CHARGING CASES FOR EARPHONES

The present disclosure is related primarily to a charging case for earphones. The earphones may include a core module and a hook structure connected to the core module. The charging case may include a lower housing assembly provided with a profiling groove for accommodating the earphones, the profiling groove includes a first profiling groove region corresponding to the core module and a second profiling groove region corresponding to the hook structure; when the earphones are accommodated in the profiling groove, in an extension direction of the hook structure, a movable gap between a portion of the hook structure away from the core module and a side wall of the second profiling groove region is greater than a movable gap between the core module and a side wall of the first profiling groove region. With such arrangement, a success rate of the earphones entering the charging case can be improved.

TECHNICAL FIELD

The present disclosure relates to the technical field of electronic devices, and in particular, to charging cases for earphones.

BACKGROUND

With the increasing popularity of electronic devices, the electronic devices have become indispensable social and entertainment tools in people's daily life, and people's requirements for the electronic devices are also increasing. The electronic devices (e.g., earphones) have also been widely used in people's daily life, which can be used in conjunction with terminal devices (e.g., mobile phones, computers, etc.) to provide users with an auditory feast. According to the working principle of the earphones, the earphones can generally be divided into gas-conducting earphones and bone-conducting earphones. According to the way that the user wears the earphones, the earphones can generally be divided into headset earphones, ear-hanging earphones, and in-ear earphones. According to the interaction between the earphones and the electronic devices, the earphones can generally be divided into wired earphones and wireless earphones. Furthermore, when the power of the earphones is low or the earphones are not in use, the earphones can be accommodated in corresponding charging cases for charging and storing. In related techniques, there is a technical issue with the low success rate of earphones entering the charging case during the insertion process.

SUMMARY

The present disclosure provides a charging case for earphones, including a core module and a hook structure connected to the core module. The charging case may include a lower housing assembly provided with a profiling groove for accommodating the earphones. The profiling groove may include a first profiling groove region corresponding to the core module and a second profiling groove region corresponding to the hook structure. When the earphones are accommodated in the profiling groove, in an extension direction of the hook structure, a movable gap between a portion of the hook structure away from the core module and a side wall of the second profiling groove region may be greater than a movable gap between the core module and the side wall of the first profiling groove region.

In some embodiments, a dimension of the movable gap between the portion of the hook structure away from the core module and the side wall of the second profiling groove region may be within a range of 0.5 mm to 1.5 mm, a dimension of the movable gap between the core module and the side wall of the first profiling groove region may be within a range of 0.05 mm to 0.2 mm.

In some embodiments, the portion of the hook structure away from the core module may include a battery housing, and a movable gap between the battery housing and the side wall of the second profiling groove region may be greater than the movable gap between the core module and the side wall of the first profiling groove region.

In some embodiments, the hook structure may include an elastic part. The elastic part may connect the core module and the battery housing. When the earphones are accommodated in the profiling groove, a movable gap between the elastic part and the side wall of the second profiling groove region may be greater than the movable gap between the core module and the side wall of the first profiling groove region.

In some embodiments, the hook structure may further include a rigid part connecting the core module and the elastic part. When the earphones are accommodated in the profiling groove, the movable gap between the elastic part and the side wall of the second profiling groove may be greater than a movable gap between the rigid part and the side wall of the second profiling groove region.

In some embodiments, the core module may be provided with a first magnetic suction member, and the lower housing assembly may be provided with a first magnetic suction structure that cooperates with the first magnetic suction member. When the earphones are accommodated in the profiling groove, the first magnetic suction member may cooperate magnetically with the first magnetic suction structure.

In some embodiments, the hook structure may be provided with a second magnetic suction member, and the lower housing assembly may be further provided with a second magnetic suction structure that cooperates with the second magnetic suction member. When the earphones are accommodated in the profiling groove, the second magnetic suction member may cooperate magnetically with the second magnetic suction structure.

In some embodiments, the lower housing assembly may further include a first electrode terminal disposed between the first magnetic suction structure and the second magnetic suction structure. After the earphones are placed into the profiling groove, a first magnetic suction matching pair may be formed by the first magnetic suction structure and the first magnetic suction member within the earphones. A second magnetic suction matching pair may be formed by the second magnetic suction structure and the second magnetic suction member within the earphones, and the first magnetic suction matching pair and the second magnetic suction matching pair may make the first electrode terminal to be in contact with a second electrode terminal of the earphones in a one-to-one correspondence.

In some embodiments, the lower housing assembly may be provided with two profiling grooves. Two second profiling groove regions of the two profiling grooves may be disposed intersecting with each other, so that when the two profiling grooves accommodate the earphones, respectively, two hook structures of the earphones may overlap with each other and form two overlapping points.

In some embodiments, regions of the two second profiling groove regions that are located between the two overlapping points and surrounded by the two hook structures may be merged into a whole region.

In some embodiments, regions of the two second profiling groove regions that are located between the two overlapping points and surrounded by the hook structures may include an isolated island, and a movable gap between each of the hook structures and a side wall of the isolated island may be greater than the movable gap between the core module and the side wall of the first profiling groove region.

In some embodiments, the charging case may include an electrode terminal at least used for charging. The electrode terminal is disposed at a region outside where the battery housing is located in the profiling groove.

According to some embodiments of the present disclosure, when the earphones are placed into the profiling grooves, by disposing the movable gap between the portion of the hook structure away from the core module and the side wall of the second profiling groove region in the extension direction of the hook structure to be greater than the movable gap between the core module and the side wall of the first profiling groove region, the first profiling groove region can allow the core module to be placed smoothly. Meanwhile, the second profiling groove region can provide a greater movable space for the hook structure, thereby improving the success rate of the earphones entering the charging case and a stability of the placement.

DETAILED DESCRIPTION

The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, and not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present disclosure.

Reference herein to the term “embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The occurrences of the term in various places in the present disclosure are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

FIG.1is a schematic diagram illustrating an exemplary anterior side profile of an ear of a user according to some embodiments of the present disclosure. Referring toFIG.1, an ear100of a user may include physiological parts, such as an external ear canal101, a cavity of auricular concha102, a cymba of auricular concha103, a triangular fossa104, an antihelix105, a scapha106, a helix107, and a tragus108. Although the external ear canal101has a certain depth and extends to a tympanic membrane of the ear100, for the convenience of description and in combination withFIG.1, unless otherwise specified, the external ear canal101refers to an entrance (i.e., an aperture) of the external ear canal101that is away from the tympanic membrane in the present disclosure. In some embodiments, the physiological parts (e.g., the cavity of auricular concha102, the cymba of auricular concha103, the triangular fossa104, etc.) have a certain volume and depth, and the cavity of auricular concha102is directly connected to the external ear canal101, which can be simply regarded as that the aperture is located at a bottom of the cavity of auricular concha102.

In some embodiments, there may be individual differences between different users, resulting in dimensional differences (e.g., different shapes, sizes, etc.) of ears. For the convenience of description and to reduce (or even eliminate) the individual differences between the users, a simulator (e.g., GRAS 45BC KEMAR) including a head and (left and right) ears of the head may be produced based on the ANSI: S3.36, S3.25 and IEC: 60318-7 standards. Therefore, in the present disclosure, embodiments such as “a user wears earphones,” “the earphones are in a wearing state,” “in the wearing state,” etc., may refer to the earphones of the present disclosure being worn on the ears of the simulator. Due to the individual differences between different users, there may be certain differences when the earphones are worn by different users and when the earphones are worn on the ears of the simulator, but the differences should be tolerated.

It should be noted that in the fields of medicine, anatomy, etc., three basic sections (i.e., a sagittal plane, a coronal plane, and a horizontal plane) and three basic axes (i.e., a sagittal axis, a coronal axis, and a vertical axis) of a human body may be defined. The sagittal plane refers to a section perpendicular to the ground made along anterior and posterior directions of the human body, which divides the human body into left and right parts. The coronal plane refers to a section perpendicular to the ground made along left and right directions of the human body, which divides the human body into anterior and posterior parts. The horizontal plane refers to a section parallel to the ground made along upper and lower directions of the human body, which divides the human body into upper and lower parts. Correspondingly, the sagittal axis refers to an axis along an anterior-posterior direction of the human body and perpendicular to the coronal plane, the coronal axis refers to an axis along a left-right direction of the human body and perpendicular to the sagittal plane, and the perpendicular axis refers to an axis along an upper-lower direction of the human body and perpendicular to the horizontal plane. In some embodiments, an “anterior side of the ear” of the present disclosure is a concept with respect to a “posterior side of the ear.” The anterior side refers to a side of the ear away from the head, and the posterior side refers to a side of the ear facing the head, both of which are directed toward the ear of the user. By observing the ear of the simulator along a direction where the coronal axis of the human body is located, a schematic diagram of an anterior side profile of the ear100can be obtained as shown inFIG.1.

In some embodiments, in combination withFIGS.2-5, each of at least one earphone10may include a core module11and a hook structure12connected to the core module11. The core module11may be disposed on an anterior side of an ear in a wearing state, and at least a portion of the hook structure12may be disposed on a posterior side of the ear in the wearing state, so as to dispose the earphone10on the ear in the wearing state. The core module11may include a connection end CE connected to the hook structure12and a free end FE not connected to the hook structure12. In some embodiments, the core module11may be disposed not to block an external ear canal in the wearing state, so that the earphone10serves as an “open earphone.” Due to individual differences between different users, when the earphone10is worn by different users, the core module11may partially block the external ear canal, but the external ear canal may remain unblocked.

In order to improve the stability of the earphone10in the wearing state, one or more following manners may be used in the earphone10. Firstly, at least a portion of the hook structure12may be disposed as a profiling structure that fits with at least one of the posterior side of the ear and the head to increase a contact area between the hook structure12and the ear and/or the head, thereby increasing a resistance of the earphone10from falling off from the ear. Secondly, at least a portion of the hook structure12may be disposed as an elastic structure to have a certain amount of deformation in the wearing state, so as to increase a positive pressure of the hook structure12on the ear and/or the head, thereby increasing the resistance of the earphone10from falling off from the ear. Thirdly, at least a portion of the hook structure12may be disposed to abut against the head in the wearing state to form a counterforce that presses on the ear, so as to press the core module11on the anterior side of the ear, thereby increasing the resistance of the earphone10from falling off from the ear. Fourthly, the core module11and the hook structure12may be disposed to clamp physiological part(s) (e.g., a region where an antihelix is located, a region where a cymba of auricular concha is located, etc.) from the anterior and posterior sides of the ear in the wearing state, thereby increasing the resistance of the earphone10from falling off from the ear. Fifthly, at least a portion of the core module11or an auxiliary structure connected to the core module11may be disposed to extend into the physiological part(s) (e.g., the cavity of auricular concha, a cymba of auricular concha, a triangular fossa, a scapha, etc.), thereby increasing the resistance of the earphone10from falling off from the ear.

In some embodiments, in combination withFIG.3, in the wearing state, the free end FE of the core module11may extend into the cavity of auricular concha. The core module11and the hook structure12may be disposed to jointly clamp anterior and posterior sides of an ear region corresponding to the cavity of auricular concha, so as to increase the resistance of the earphone10from falling off from the ear, thereby improving the stability of the earphone10in the wearing state. For example, the free end FE may press into the cavity of auricular concha in a thickness direction X. As another example, the free end FE may abut against the cavity of auricular concha in a length direction Y and a width direction Z.

It should be noted that in the wearing state, in addition to extending into the concha cavity, the free end FE of the core module11can not only be projected orthogonally on the antihelix, but also can be projected orthogonally on left and right sides of the head and be located at a position of the anterior side of the ear on the sagittal axis of the human body. In other words, the hook structure12may support the core module11to be worn to wearing positions of the cavity of auricular concha, the antihelix, the anterior side of the ear, etc.

In some embodiments, in combination withFIGS.3and4, in the wearing state, the core module11may include an inner side surface IS facing the ear along the thickness direction X, an outer side surface OS away from the ear along the thickness direction X, and a connection surface connecting the inner side surface IS and the outer side surface OS. The thickness direction X may be defined as a direction in which the core module11approaches or moves away from the ear in the wearing state. In some embodiments, at least a portion of the connection surface may be disposed within the cavity of auricular concha in the wearing state, and form a first contact region with the anterior side of the ear. The hook structure12may form a second contact region with the posterior side of the ear in the wearing state. The second contact region and the first contact region may at least partially overlap along the thickness direction of the ear region. In this way, not only the core module11and the hook structure12can jointly clamp the ear from the anterior and posterior sides of the ear, but also a clamping force formed can be mainly manifested as a compressive stress, which improves the stability and comfort of the earphone10in the wearing state.

It should be noted that in the wearing state and viewed along a direction where the coronal axis is located, the core module11may be disposed as a shape, such as a circle, an oval, a rounded square, a rounded rectangle, etc. When the core module11is disposed as a shape, such as the circle, the oval, etc., the connection surface may refer to a curved side surface of the core module11. When the core module11is disposed as a shape, such as the rounded corner square, the rounded corner rectangle, etc., the connection surface may include a lower side surface LS, an upper side surface US, and a rear side surface RS as mentioned later. In some embodiments, the core module11may have the length direction Y and the width direction Z perpendicular to the thickness direction X, and the length direction Y and the width direction Z may be orthogonal to each other. The length direction Y may be defined as a direction in which the core module11approaches or moves away from the back of the user's head in the wearing state, and the width direction Z may be defined as a direction in which the core module11approaches or moves away from the top of the user's head in the wearing state. Therefore, for the convenience of description, the core module11being disposed as the rounded rectangle may be taken as an example for illustration in the present embodiment. A length of the core module11along the length direction Y may be greater than a width of the core module11along the width direction Z.

In some embodiments, in combination withFIGS.2,3, and5, in the wearing state and viewed along the direction where the coronal axis of the human body is located, the connection end CE may be closer to the top of the head than the free end FE, so as to facilitate the free end FE to extend into the cavity of auricular concha. Based on this, an included angle between the length direction Y and a direction where the sagittal axis of the human body is located may be within a range of 15 degrees to 60 degrees. If the included angle is too small, the free end FE may be unable to extend into the cavity of auricular concha, and a sound outlet hole111aon the core module11may be too far away from the external ear canal. If the included angle is too large, the free end FE may also be unable to extend into the cavity of auricular concha, and the external ear canal may be blocked by the core module11. In other words, by disposing the included angle in such a manner, not only the free end FE can be able to extend into the cavity of auricular concha, but also a suitable distance between the sound outlet hole111aon the core module11and the external ear canal can be disposed, so that sound waves generated by the core module11that the user can hear are increased when the external ear canal is not blocked.

In some embodiments, in combination withFIG.4, an orthographic projection of the hook structure12on a reference plane (e.g., an XZ plane inFIG.4) perpendicular to the length direction Y may partially overlap with an orthographic projection of the free end FE on the same reference plane. An overlapping region formed by the orthographic projection of the hook structure12on the reference plane and the orthographic projection of the free end FE on the same reference plane may be located between the inner side surface IS and the outer side surface OS in the thickness direction X. In this way, not only the core module11and the hook structure12can jointly clamp the ear from the anterior and posterior sides of the ear, but also the clamping force formed may be mainly manifested as the compressive stress, which improves the stability and comfort of the earphone10.

In some embodiments, in combination withFIGS.2,4,5, and9, the hook structure12may include an elastic metal wire121connected to the core module11and a battery housing123connected to an end of the elastic metal wire121away from the core module11. A battery14coupled to the core module11may be disposed in the battery housing123. An orthographic projection of the battery housing123on the reference plane may partially overlap with the orthographic projection of the free end FE on the same reference plane. In this way, when the free end FE abuts against the cavity of auricular concha, the battery housing123can support the ear from the posterior side of the ear, which improves the stability of the earphone10in the wearing state. The battery housing123may include a housing cover1231connected to the elastic metal wire121and a battery compartment1232connected to the housing cover1231. The battery compartment1232and the housing cover1231may cooperate with each other to form a chamber structure for accommodating the battery14.

In some embodiments, in combination withFIG.5, in the wearing state, the core module11may include the upper side surface US away from the external ear canal along the width direction Z, the lower side surface LS facing the external ear canal along the width direction Z, and the rear side surface RS connecting the upper side surface US and the lower side surface. The rear side surface RS may be disposed at an end of the length direction Y facing the back of the head in the wearing state, and at least a portion of the rear side surface RS may be disposed within the cavity of auricular concha. An edge of an orthographic projection of the hook structure12on a reference plane (e.g., a YZ plane inFIG.5) perpendicular to the thickness direction X facing the core module11may be divided into a first section S1and a second section S2in a continuous arcuate transition. A demarcation point DP between the first section S1and the second section S2may be a location where the edge is furthest away from the upper side surface US along the width direction Z. In some embodiments, an overall degree of curvature of the hook structure12in the first section S1may be greater than an overall degree of curvature of the hook structure12in the second section S2. In this way, not only the free end FE can be allowed to extend into the cavity of auricular concha, but also the hook structure12can cooperate with the core module11to provide a suitable clamping force.

It should be noted that the above overall degree of curvature may be used to qualitatively characterize a degree of curvature of different sections of the hook structure12. A radius of curvature of each section may be a constant value or be continuously varied. Therefore, there may be at least one point within the first section S1having a radius of curvature that is less than a radius of curvature of any point within the second section S2. In some embodiments, the overall degree of curvature may also be quantitatively characterized by an average radius of curvature. That is, radii of curvature of N points on each section may be determined, and then averaged to obtain an average radius of curvature of each section.

In some embodiments, a length of the second section S2may be greater than a length of the first section S1in an extension direction of the hook structure12, so as to facilitate the clamping of the ear by the hook structure12together with the core module11, and to increase a contact area between the hook structure12and the user's skin, thereby improving the stability of the earphone10in the wearing state.

In some embodiments, the earphone10may include a first reference line section RL1parallel to the width direction Z. A starting point of the first reference line section RL1may be a point where the first reference line section RL1intersects with the upper side surface US, and an ending point of the first reference line section RL1may be the demarcation point DP. A second reference line section RL2, a third reference line section RL3, and a fourth reference line section RL4as mentioned later may be sequentially increasingly farther away from the starting point of the first reference line section RL1in the width direction Z. In some embodiments, a length of the first reference line section RL1may be within a range of 13 millimeters (mm) to 20 mm. If the length of the first reference line section RL1is too small, the free end FE may be unable to extend into the cavity of auricular concha, and a sound outlet hole111aon the core module11may be too far away from the external ear canal. If the length of the first reference line section RL1is too large, the free end FE may also be unable to extend into the cavity of auricular concha, and the external ear canal may be blocked by the core module11. In other words, by disposing the length of the first reference line section RL1in such a manner, not only the free end FE can be able to extend into the cavity of auricular concha, but also the suitable distance between the sound outlet hole111aon the core module11and the external ear canal can be disposed, so that sound waves generated by the core module11that the user can hear are increased when the external ear canal is not blocked.

In some embodiments, the second reference line section RL2passing ¼ of the first reference line section RL1and parallel to the length direction Y may intersect with the first section S1and the second section S2at a first intersection point P1and a second intersection point P2, respectively. A distance between the first intersection point P1and the starting point of the first reference line section RL1may be within a range of 9 mm to 15 mm, and a distance between the second intersection point P2and the starting point of the first reference line section RL1may be within a range of 12 mm to 19 mm. The third reference line section RL3passing through ½ of the first reference line section RL1and parallel to the length direction Y may intersect with the first section S1and the second section S2at a third intersection point P3and a fourth intersection point P3, respectively. A distance between the third intersection point P3and the starting point of the first reference line section RL1may be within a range of 11 mm to 18 mm, and a distance between the fourth intersection point P4and the starting point of the first reference line section RL1may be within a range of 12 mm to 19 mm. The fourth reference line section RL4passing through ¾ of the first reference line section RL1and parallel to the length direction Y may intersect with the first section S1and the second section S2at a fifth intersection point P5and a sixth intersection point P6, respectively. A distance between the fifth intersection point P5and the starting point of the first reference line section RL1may be within a range of 12 mm to 19 mm, and a distance between the sixth intersection point P6and the starting point of the first reference line section RL1may be within a range of 12 mm to 19 mm. In this way, when the free end FE extends into the cavity of auricular concha, and the suitable distance between the sound outlet hole111aon the core module11and the external ear canal is disposed, the hook structure12can be better fit with the ear.

In some embodiments, there may be a fifth reference line section RL5with a shortest spacing along the length direction Y between the second section S2and the rear side surface RS. A length of the fifth reference line section RL5may be within a range of 2 mm to 3 mm. If the length of the fifth reference line section RL5is too small, the clamping force provided by the core module11and the hook structure12on the ear may be too large, causing wearing discomfort. If the length of the fifth reference line section RL5is too large, the clamping force provided by the core module11and the hook structure12on the ear may be too small, causing wearing instability. In other words, by disposing the length of the fifth reference line section RL5in such a manner, the stability and comfort of the earphone10in the wearing state can be considered.

In some embodiments, the fifth reference line section RL5may be defined by designating a point where the fifth reference line section RL5intersects with the rear side surface RS as a starting point of the fifth reference line section RL5, and designating a point where the fifth reference line section RL5intersects with the second section S2as an ending point of the fifth reference line section RL5. An orthographic projection of an intersection point between the first reference line section RL1and the upper side surface US along the length direction Y may intersect with the second section S2at a seventh intersection point P7, and an orthographic projection of an intersection point between an extension line of the first reference line section RL1and the lower side surface LS along the length direction Y may intersect with the second section S2at an eighth intersection point P8. A distance between the seventh intersection point P7and the starting point of the fifth reference line section RL5may be within a range of 5 mm to 9 mm, and a distance between the eighth intersection point P8and the starting point of the fifth reference line section RL5may be within a range of 5 mm to 9 mm. In this way, the hook structure12can be better fit with the ear while the stability and comfort of the earphone10in the wearing state can be considered.

In some embodiments, in combination withFIGS.7,8, and5, the core module11may include a core housing111connected to the hook structure12and a loudspeaker112disposed within the core housing111. An inner side surface (e.g., the inner side surface IS) of the core housing111facing the ear in the wearing state may be disposed with the sound outlet hole111a, and the sound waves generated by the loudspeaker112may be propagated out through the sound outlet hole111a, so as to be easily transmitted into the external ear canal. It should be noted that, the sound outlet hole111amay also be disposed on a side of the core housing111corresponding to the lower side surface LS, and may also be disposed at a corner between the inner side surface and the lower side surface LS. In some embodiments, the loudspeaker112may include a magnetic circuit system, a voice coil extending into the magnetic circuit system, and a diaphragm connected to the voice coil. A magnetic field generated by the voice coil after being energized may interact with a magnetic field formed by the magnetic circuit system to drive the diaphragm to generate mechanical vibrations, and then a sound may be generated by propagating the mechanical vibrations through media, such as air, etc.

In some embodiments, in combination withFIGS.7-9, the earphone10may include a main control circuit board13disposed within the core housing111and the battery14disposed at one end of the hook structure12away from the core module11. The battery14and the loudspeaker112may be coupled to the main control circuit board13, respectively, to allow the battery14to power the loudspeaker112under the control of the main control circuit board13. In some embodiments, both the battery14and the loudspeaker112may also be disposed within the core housing111, and the battery14may be located closer to the connection end CE while the loudspeaker112may be located closer to the free end FE.

In some embodiments, in combination withFIGS.3and1, since the cavity of auricular concha has a certain volume and depth, after the free end FE is extended into the cavity of auricular concha, there may be a certain spacing between the inner side surface IS of the core housing111and the cavity of auricular concha. In other words, the core module11may cooperate with the cavity of auricular concha in the wearing state to form an auxiliary chamber that is connected to the external ear canal, and at least a portion of the sound outlet hole111amay be located within the auxiliary chamber. In this way, in the wearing state, the sound waves generated by the loudspeaker112and propagated through the sound outlet hole111amay be limited by the auxiliary chamber. That is, the auxiliary chamber can aggregate the sound waves so that more of the sound waves can be propagated into the external ear canal, which increases the volume and sound quality of the sound heard by the user in a near field, thereby improving the acoustic effectiveness of the earphone10. In some embodiments, since the core module11can be disposed not to block the external ear canal in the wearing state, the auxiliary chamber may be disposed in a semi-open arrangement. In this way, most of the sound waves generated by the speaker112and propagated through the sound outlet111amay be propagated to the external auditory canal, and a small portion of the sound waves may be propagated to the earphone10and outside the ear via a gap between the core module11and the ear (e.g., a portion of the cavity of auricular concha that is not covered by the core module11), thereby forming a first sound leakage in a far field. At the same time, the core module11is generally disposed with an acoustic hole (e.g., a pressure relief hole111cas mentioned later), and sound waves propagated through the acoustic hole generally form a second sound leakage in the far field. A phase of the first sound leakage and a phase of the second sound leakage are (proximity) opposite to each other, so that the two sound leakages can be canceled out in the far field inversely, thereby reducing the sound leakage of the earphone10in the far field.

In some embodiments, the earphone10may include an adjusting mechanism connecting the core module11and the hook structure12. Different users can adjust a relative position of the core module11on the ear in the wearing state through the adjusting mechanism, so as to cause the core module11to be located at a suitable position, thereby causing the core module11to form the auxiliary chamber with the cavity of auricular concha. Besides, due to the presence of the adjusting mechanism, the user can adjust the earphone10to be worn in a more stable and comfortable position.

In some embodiments, in combination withFIG.6, the earphone10was first worn on the simulator, a position of the core module11was adjusted on an ear of the simulator, and then a frequency response curve of the earphone10was measured by a detector (e.g., a microphone) disposed within an external ear canal (e.g., a position of a tympanic membrane, i.e., a listening position) of the simulator, so as to simulate a listening effectiveness of the user after wearing the earphone10. The frequency response curve may be used to characterize a changing relationship between a vibration magnitude and a frequency. A horizontal coordinate of the frequency response curve may be denoted as a frequency in hertz (Hz), and a vertical coordinate of the frequency response curve may be denoted as a vibration magnitude in decibels (dB). As illustrated inFIG.6, a curve6_1may represent a frequency response curve when the core module11is in the wearing state without forming the auxiliary chamber with the cavity of auricular concha, and a curve6_2may represent a frequency response curve when the core module11is in the wearing state with forming the auxiliary chamber with the cavity of auricular concha. Based on this, it can be directly and unquestionably concluded from a comparison diagram of the frequency response curves shown inFIG.6that the curve6_2is located overall above the curve6_1. That is, compared with the core module11not forming the auxiliary chamber with the cavity of auricular concha in the wearing state, the core module11forming the auxiliary chamber with the cavity of auricular concha in the wearing state can improve the acoustic effectiveness of the earphone10.

In some embodiments, in combination withFIGS.7,9, and11, the core module11may include a flexible insert1131disposed outside the core housing111. A hardness of the flexible insert1131may be smaller than a hardness of the core housing111. The core housing111may be a plastic component. The flexible insert1131may be made of silicone, rubber, etc., and may be formed on a predetermined region of the core housing111by injection molding. In some embodiments, at least a portion of the flexible insert1131may cover a region of the core housing111corresponding to the free end FE, such that at least a portion of the core module11abuts against the cavity of auricular concha through the flexible insert1131. In other words, the portion of the core housing111that extends into the cavity of auricular concha and is in contact with the cavity of auricular concha may be covered by the flexible insert1131. In this way, when the core module11abuts against the cavity of auricular concha, for example, when the core module11and the hook structure12are disposed to jointly clamp the ear from the anterior and posterior sides of the ear region corresponding to the cavity of auricular concha of the ear, the flexible insert1131may serve as a cushioning effect between the core housing111and the ear (e.g., the ear region) to relieve a pressure of the earphone10on the ear, thereby improving the comfort of the earphone10in the wearing state.

In some embodiments, the flexible insert1131may successively cover at least a portion of regions of the core housing111corresponding to the rear side surface RS, the upper side surface US, and the lower side surface LS. For example, a region of the core housing111corresponding to the rear side surface RS may be covered more than 90% by the flexible insert1131, and regions of the core housing111corresponding to the upper side surface US and the lower side surface LS may be respectively covered about 30% by the flexible insert1131. In this way, the comfort of the earphone10in the wearing state and the need for structural components such as the loudspeaker112disposed in the core housing111may be considered.

In some embodiments, the flexible insert1131may have a U-shape viewed along the thickness direction X.

In some embodiments, a portion of the flexible insert1131corresponding to the lower side surface LS may abut against the tragus. A thickness of a portion of the flexible insert1131corresponding to the rear side surface RS may be smaller than a thickness of a portion of the flexible insert1131corresponding to the upper side surface US and a thickness of the portion of the flexible insert1131corresponding to the lower side surface LS, respectively, which provides good comfort even when the core module11abuts against an uneven position within the cavity of auricular concha.

In some embodiments, in combination withFIGS.7and8, the core housing111may include a core inner housing1111and a core outer housing1112snap-fit with each other along the thickness direction X. The core inner housing1111may be closer to the ear than the core outer housing1112in the wearing state. A parting surface111bbetween the core outer housing1112and the core inner housing1111may be inclined toward a side where the core inner housing1111is located in a direction close to the free end FE, which causes the flexible insert1131to be disposed in the region of the core housing111corresponding to the free end FE as much as possible. For example, in combination withFIG.11, the whole flexible insert1131may be disposed in the region of the core housing111corresponding to the free end FE to simplify a structure of the core module11and reduce a processing cost.

In some embodiments, in combination withFIGS.7,8, and11, the core module11may include a flexible coating1132. A hardness of the flexible coating1132may be smaller than the hardness of the core housing111. The core housing111may be a plastic fabrication. The flexible coating1132may be made of silicone, rubber, etc., and may be formed on the predetermined region of the core housing111by injection molding, glue connection, etc. In some embodiments, the flexible coating1132may integrally cover at least a portion of an outer surface of the flexible insert1131and at least a portion of an outer surface of the core outer housing1112that is not covered by the flexible insert1131, which improves the consistency of the core module11in appearance. In some embodiments, the flexible coating1132may further cover an outer surface of the core inner housing1111. The hardness of the flexible insert1131may be smaller than the hardness of the flexible coating1132to allow the flexible insert1131to be soft enough. Besides, the flexible coating1132can also improve the comfort of the earphone10in the wearing state and have a certain structural strength to protect the flexible insert1131. In some embodiments, an area of the outer surface of the flexible insert1131may be within a range of 126 square millimeters (mm2) to 189 mm2. If the area is too small, the comfort of the core module11in the wearing state can be reduced. If the area is too large, the volume of core module11can be too large, and an area of the flexible insert1131not against the cavity of auricular concha can be too large, which deviates from an original purpose of disposing the flexible insert1131. In some embodiments, a thickness of the flexible coating1132may be smaller than a thickness of the core outer housing1112.

In some embodiments, in combination withFIGS.11and9, the core module11may include a metallic function pattern, such as an antenna pattern1141and/or a touch pattern1142disposed between the core outer housing1112and the flexible coating1132. The antenna pattern1141may be molded on an outer side of the core outer housing1112using a laser-direct-structuring (LDS) technique. The touch pattern1142may be molded on the outer side of the core outer housing1112using the LDS technique, or may be a flexible touch circuit board attached to the outer side of the core outer housing1112. In some embodiments, the core outer housing1112may be disposed with metalized holes connected to the antenna pattern1141and the touch pattern1142, respectively. At this time, since the main control circuit board13is disposed in the core housing111(e.g., the main control circuit board13is connected to the core outer housing1112), the main control circuit board13may be in contact with an inner wall of a corresponding metalized hole through an elastic metal component (e.g., a pogo-PIN, a metal shrapnel, etc.). For example, the antenna pattern1141and the touch pattern1142may be connected to a pogo-PIN131and a pogo-PIN132soldered on the main control circuit board13, respectively. Correspondingly, the loudspeaker112may be disposed on a side of the main control circuit board13away from the core outer housing1112. In this way, compared to the antenna pattern1141and the touch control pattern1142being disposed on an inner side of the core outer housing1112facing the loudspeaker112, respectively, the antenna pattern1141may be disposed on the outer side of the core outer housing1112, which can increase a spacing between the antenna pattern1141and the main control circuit board13. That is, an antenna headroom region can be improved, thereby increasing the interference immunity of the antenna pattern1141. By disposing the touch pattern1142on the outer side of the core outer housing1112, a spacing between the touch pattern1142and an external signal trigger source (e.g., a user's finger) may be shortened. That is, a touch spacing can be reduced, thereby increasing the sensitivity of the touch pattern1142to be triggered by the user.

In some embodiments, the antenna pattern1141may surround a periphery of the touch pattern1142to make full use of a space of the outer side of the core outer housing1112. The antenna pattern1141may have a U-shape, and the touch pattern1142may have a square shape.

In some embodiments, the core module11may include a microphone133soldered on the main control circuit board13. The microphone133may pick up a user voice and environment sound through a sound pickup through hole disposed in the core outer housing1112. When the main control circuit board13is connected to the core outer housing1112, the microphone133may be further pressed against the core outer housing1112.

In some embodiments, in combination withFIGS.10and11, the core inner housing1111may include a bottom wall1113and a first side wall1114connected to the bottom wall1113, and the core outer housing1112may include a top wall1115and a second side wall1116connected to the top wall1115. The second side wall1116and the first side wall1114may be snap-fit to each other along the parting surface111b, and may support each other. Viewed along the width direction Z and in a reference direction (e.g., an opposite direction of an arrow Y inFIGS.10and11) that the connection end CE points to the free end FE, a portion of the first side wall1114near the free end FE may be progressively closer to the bottom wall1113in the thickness direction X, and a portion of the second side wall1116near the free end FE may be progressively farther away from the top wall1115in the thickness direction X, such that the parting surface111bis inclined toward the side where the core inner housing1111is located in the direction close to the free end FE. At this point, at least a portion of the flexible insert1131may be disposed on an outer side of the second side wall1116. For example, in combination withFIGS.11and9, a portion of the flexible insert1131may be disposed on an outer side of the top wall1115in addition to being disposed on the outer side of the second side wall1116. Correspondingly, the sound outlet hole111amay be disposed on the bottom wall1113. In some embodiments, the sound outlet hole111amay also be disposed on a side of the first side wall1114corresponding to the lower side surface LS, and may also be disposed at a corner between the first side wall1114and the bottom wall1113. In some embodiments, the antenna pattern1141, the touch pattern1142, and their respective metalized holes may be disposed on the top wall1115, and the sound pickup through hole of the microphone133may also be disposed on the top wall1115.

In some embodiments, in combination withFIGS.7and11, the core outer housing1112may be disposed with an embedding groove at least partially disposed on the second side wall1116. The flexible insert1131may be embedded in the embedding groove, resulting in a continuous transition between an outer surface of a region of the core outer housing1112that is not covered by the flexible insert1131and the outer surface of the flexible insert1131. A region where the flexible insert1131is located inFIG.7may be simply regarded as the embedding groove. In this way, it is not only beneficial for the flexible insert1131to be stacked on the core outer housing1112during the injection molding to avoid the flexible insert1131from overflowing, but is also beneficial to improve the appearance quality of the core module11to avoid the core module11from having a pitted surface.

In some embodiments, the second side wall1116may include a first sub-side wall segment1117and a second sub-side wall segment1118connected to the first sub-side wall segment1117. The first sub-side wall segment1117may be closer to the top wall1115in the thickness direction X than the second sub-side wall segment1118, and the second sub-side wall segment1118may protrude toward the outer side of the core housing111than the first sub-side wall segment1117. In short, the second side wall1116may have a step-like structure. In this way, it is not only beneficial for the flexible insert1131to be stacked on the core outer housing1112during the injection molding to avoid the flexible insert1131from overflowing, but is also beneficial for the core module11to abut against the cavity of auricular concha through the flexible insert1131, thereby improving the comfort of the earphone10in the wearing state.

In some embodiments, the main control circuit board13may be connected to the core outer housing1112(e.g., fixed to a heat stack connected to the top wall1115), and may partially overlap with the first sub-side wall segment1117in the thickness direction X. The loudspeaker112may partially overlap with the second sub-side wall segment1118in the thickness direction X. In this way, a size of the loudspeaker112can be disposed in the core housing111, thereby enhancing a volume of the sound generated by the earphone10.

In some embodiments, in combination withFIGS.10and8, the core housing111may be disposed with the pressure relief hole111c. The pressure relief hole111cmay be configured to connect a space on a side of the loudspeaker112facing the main control circuit board13and the external environment. That is, air can freely move in and out of the space. In this way, a resistance of the diaphragm of the loudspeaker112can be reduced during vibration. The pressure relief hole111cmay face the top of the head in the wearing state, which prevents the sound waves propagated through the pressure relief hole111cfrom forming a sound leakage (i.e., the second sound leakage) and being heard. Based on a Helmholtz resonance cavity, an aperture of the pressure relief hole111cmay be as large as possible to shift a resonance frequency of the second sound leakage as much as possible towards relatively high frequency bands (e.g., a frequency range larger than 4 kilohertz (kHz)), which further avoids the second sound leakage from being heard.

In some embodiments, the core housing111may be disposed with a tuning hole111d. The tuning hole111dmay be used to shift the resonant frequency of the second sound leakage as much as possible towards the relatively high frequency bands (e.g., the frequency range larger than 4 kHz), which further prevents the second sound leakage from being heard. An area of the tuning hole111dmay be smaller than an area of the pressure relief hole111cto allow the space on the side of the loudspeaker112facing the main control circuit board13to be more connected to the external environment through the pressure relief hole111c. In some embodiments, a spacing between the sound outlet hole111aand the pressure relief hole111cin the width direction Z may be greater than a spacing between the sound outlet hole111aand the tuning hole111din the width direction Z, so as to avoid sound waves respectively propagating through the sound outlet hole111aand the pressure relief hole111cto be canceled out in the near field inversely, thereby increasing the volume of the sound propagated through the sound outlet hole111aheard by the user. Correspondingly, the tuning hole111dmay be closer to the connection end CE than the sound outlet hole111ato increase a spacing between the tuning hole111dand the sound outlet hole111ain the length direction Y, so as to avoid the sound waves respectively propagating through the sound outlet hole111aand the tuning hole111dto be canceled in the near field inversely, thereby increasing the volume of the sound propagated through the sound outlet hole111aheard by the user.

In some embodiments, in combination withFIG.10, the sound outlet hole111a, the pressure relief hole111c, and the tuning hole111dmay be disposed on the core inner housing1111. For example, the sound outlet hole111amay be disposed on the bottom wall1113, and the pressure relief hole111cand the tuning hole111dmay be disposed on the first side wall1114, respectively. For instance, the pressure relief hole111cand the tuning hole111dmay be disposed on opposite sides of the first side wall1114along the width direction Z, respectively. In this way, since the sound outlet hole111a, the pressure relief hole111c, and the tuning hole111dare disposed on the core inner housing1111, the structure of the core outer housing1112can be simplified, thereby reducing the processing cost. In addition, since the pressure relief hole111cand the tuning hole111dare respectively disposed on the opposite sides of the first side wall1114along the width direction Z, the parting surface111bmay be symmetrically disposed with respect to a reference plane perpendicular to the width direction Z, thereby improving the appearance quality of the core module11.

In some embodiments, in combination withFIGS.7and8, the core module11may include a bracket115disposed within the core housing111. The bracket115and the loudspeaker112may be surrounded to form an acoustic chamber116to separate the acoustic chamber116from other structures (e.g., the main control circuit board13, etc.) within the core housing111, thereby improving the acoustic performance of the core module11. The core housing111may be disposed with an acoustic hole. For example, the acoustic hole may include at least one of the pressure relief hole111cor the tuning hole111d. The bracket115may be disposed with an acoustic channel1151connecting the acoustic hole and the acoustic chamber116, so as to allow the acoustic chamber116to be connected to the external environment. That is, air can freely move in and out of the acoustic chamber116. In this way, the resistance of the diaphragm of the loudspeaker112can be reduced during vibration.

In some embodiments, the bracket115may cooperate with the core housing111to form a first glue accommodation groove1171surrounding at least a portion of the acoustic hole. The first glue accommodation groove1171may accommodate first glue for sealing an assembly gap between the bracket115and the core housing111. That is, the first glue may be used for waterproof sealing, which avoids external sweat, rain, etc. from intruding into a space where the main control circuit board13is located in the movement housing111. In this way, based on the Helmholtz resonance cavity, compared to a related technique that a silicone sleeve is pressed on the core housing111through the bracket115for waterproof sealing, the waterproof sealing through the first glue in the present disclosure may eliminate the silicone sleeve in the related technique, which shortens a length of a connection portion (including the acoustic channel1151and the acoustic hole) between the acoustic chamber116and the external environment, so as to shift the resonant frequency of the sound leakage (i.e., the second sound leakage) propagated out through the pressure relief hole111cas much as possible towards the relatively high frequency bands (e.g., the frequency range larger than 4 kHz), which further avoids the second sound leakage from being heard.

It should be noted that when the acoustic hole includes the pressure relief hole111c, the first glue accommodation groove1171may surround at least a portion of the pressure relief hole111c. When the acoustic hole includes the tuning hole111d, the first glue accommodation groove1171may surround at least a portion of the tuning hole111d. When the acoustic hole includes the pressure relief hole111cand the tuning hole111d, the first glue accommodation groove1171may surround at least a portion of the pressure relief hole111cand the tuning hole111d, respectively. For the convenience of description and in combination withFIGS.8,10, and12, the acoustic hole including the pressure relief hole111cand the sound tuning hole111d, and the first glue accommodation groove1171respectively surrounding at least a portion of the pressure relief hole111cand tuning hole111dare taken as an example in the present disclosure. In some embodiments, if a gap between the bracket115and the core housing111(e.g., the bottom wall1113) is sufficiently large, or if the bottom wall1113and the first side wall1114in the core housing111are not an integrally molded structural member (i.e., two separate structural members), the first glue accommodation groove1171may surround the whole acoustic hole. That is, the first glue accommodation groove1171may be an integrally ring-shaped structure.

In some embodiments, in combination withFIGS.12and10, the bracket115may include an annular body part1152and a docking part1153connected to the annular body part1152. The annular body part1152may be sleeved on the periphery of the loudspeaker112to form the acoustic chamber116. The acoustic channel1151may penetrate through the docking part1153and the annular body part1152. In some embodiments, the docking part1153may be disposed between the annular body part1152and the core housing111, and surround at least a portion of the acoustic hole. The docking part1153may cooperate with the core housing111to form the first glue accommodation groove1171. Since the acoustic hole may include the pressure relief hole111cand the tuning hole111d, two docking parts1153may be accordingly disposed, and two first glue-holding grooves1171may be accordingly disposed. Correspondingly, the docking part1153may cooperate with the first side wall1114to form the first glue-holding groove1171. In this way, since the bracket115has an annular shape, a side of the loudspeaker112facing the main control circuit board13may be exposed, which reduces the thickness of the core module11in the thickness direction X.

In some embodiments, in combination withFIGS.10and8, an inner side of the core housing111may be disposed with a depression region1119. The acoustic hole may be disposed on a bottom of the depression region1119. The core module11may include a sound barrier mesh118disposed within the depression region1119. The docking part1153may press the sound barrier mesh118on the bottom of the depression region1119. In this way, not only the bracket115can be avoided from scraping the sound barrier mesh118during the assembly, but also assembly gaps can be narrowed between the bracket115, the sound barrier mesh118, and the core inner housing1111, thereby preventing the sound barrier mesh118from wobbling. The sound barrier mesh118may be pre-fixed to the bottom of the depression region1119through double-sided tape or glue. Alternatively, the sound barrier mesh118may be pre-fixed to a protective steel mesh, and then the protective steel mesh may be pre-fixed to the bottom of the depression region1119through the double-sided tape or glue. Correspondingly, since the acoustic hole may include the pressure relief hole111cand the tuning hole111d, two depression regions1119may be accordingly disposed, and two sound barrier meshes118may be accordingly disposed.

In some embodiments, the first glue may be further used to seal the assembly gap between the bracket115and the sound barrier mesh118and/or the assembly gap between the sound barrier mesh118and the core housing111(e.g., a side wall of the depression region1119), thereby further improving waterproof sealing.

In some embodiments, in combination withFIGS.8,10, and12, the docking part1153may be used to form a bottom wall and a side groove wall of the first glue accommodation groove1171, and the core housing111may be used to form another side groove wall of the first glue-holding groove1171. The side groove wall on the core housing111may be disposed opposite to the side groove wall on the docking part1153, so that the first glue accommodation groove1171has a certain width and depth. In some embodiments, the docking part1153may be used to form the side groove wall of the first glue accommodation groove1171, and the core housing111may be used to form the bottom wall and another side groove wall of the first glue accommodation groove1171. Alternatively, the docking part1153may be used to form the side groove wall and a portion of the bottom wall of the first glue accommodation groove1171, and the core housing111may be used to form another side groove wall and another portion of the bottom wall of the first glue accommodation groove1171.

In some embodiments, in combination withFIGS.12-14, the loudspeaker112may include a body1121and an annular bearing platform1122disposed along a circumferential direction of the body1121. A lower end of the bracket115may be supported on the annular bearing platform1122. A side of the acoustic channel1151facing the annular bearing platform1122may be openly disposed, and the annular bearing platform1122may further seal the open portion of the acoustic channel1151. At this point, the first glue accommodation groove1171may be simply regarded as surrounding a portion of the acoustic hole, so as to facilitate subsequent filling of the first glue accommodation groove1171with glue through, for example, a dispensing operation.

In some embodiments, the annular bearing platform1122may include a first annular platform surface1123and a second annular platform surface1124disposed in a stepped manner. The second annular platform surface1124may be disposed around a periphery of the first annular platform surface1123. A portion of the lower end of the bracket115may be supported on the first annular platform surface1123, and another portion of the lower end of the bracket115may form a spacing region with the second annular platform surface1124, so that the bracket115, the annular bearing platform1122, and the core housing111may cooperate with each other to form a second glue accommodation groove1172. The second glue accommodation groove1172may accommodate second glue used for sealing assembly gaps between any two of the bracket115, the annular bearing table1122, and the core housing111, thereby performing corresponding waterproof sealing.

In some embodiments, an upper end of the bracket115may be lapped on the body1121, and cooperate with the body1121to form a third glue accommodation groove1173. The third glue accommodation groove1173may accommodate third glue used for sealing an assembly gap between the bracket115and the body1121, thereby performing corresponding waterproof sealing.

It is to be noted that a specific assembly process of the core module11may include following processing operations, and a sequence of the processing operations may be adjusted as needed. In operation1) the sound barrier mesh118may be pre-fixed to the bottom of the depression region1119through the double-sided tape. In operation2) the loudspeaker112may be fixed to the bottom wall1113, and glue may be dispensed into an assembly gap between the loudspeaker112and the bottom wall1113. A portion of the corresponding glue may be stacked on the second annular platform surface1124of the loudspeaker112. In operation3) before the glue in operation2) is cured, the bracket115may be fixed to the loudspeaker112. The lower end of the bracket115may be supported on the first annular platform surface1123of the loudspeaker112, so that a region between the lower end of the bracket115and the second annular platform surface1124is also filled with the glue. The docking part1153of the bracket115may be pressed on the sound barrier mesh118and cooperate with the first side wall1114to form the first glue accommodation groove1171. The upper end of the bracket115may be lapped on the body1121and cooperate with the body1121to form the third glue accommodation groove1173. In operation4) the first glue accommodation groove1171, the third glue accommodation groove1173, the assembly gap between the lower end of the bracket115and the loudspeaker112, and the assembly gap between the lower end of the bracket115and the core inner housing1111may be dispensed with the glue. Since the assembly gap between the lower end of the bracket115and the loudspeaker112and the assembly gap between the lower end of the bracket115and the core inner housing1111are close to the first glue accommodation groove1171, the assembly gap between the lower end of the bracket115and the loudspeaker112and the assembly gap between the lower end of the bracket115and the core inner housing1111may be simply regarded as continuations of the first glue accommodation groove1171. That is, the first glue accommodation groove1171and the second glue accommodation groove1172may be connected.

In some embodiments, in combination withFIGS.15,18, and7, the hook structure12may include an adapter housing122connected to the core module11. The adapter housing122may be pre-disposed with an accommodation chamber124, and the earphone10may include an electronic component15that is subsequently installed in the accommodation chamber124. The connection between the adapter housing122and the core module11may include a snap-fit connection, a soldered connection, a glued connection, a threaded connection, a screw connection, or the like, or any combination thereof. In this way, compared to a related technique that the electronic component15is disposed in the core module11, the electronic component15is installed in the accommodation chamber124pre-disposed in the hook structure12in the present disclosure, which saves the space of the core module11to make the core module11more compact and smaller in structure. At the same time, the structure of the core module11can be simplified, and relative positions of various structural components in the earphone10can be reasonably arranged, which can improve the utilization of the core module11and the hook structure12.

It should be noted that the adapter housing122pre-disposed with the accommodation chamber124refers to that the accommodation chamber124is formed at the same time as the adapter housing122is molded, rather than being processed and formed after the adapter housing122is molded. For example, the adapter housing122may be a plastic housing, and the corresponding accommodation chamber124may be obtained after the plastic housing is injection molded by disposing a corresponding mold core. Correspondingly, the subsequent installation of the electronic component15in the accommodation chamber124refers to that the electronic component15and the adapter housing122are not integrally molded structural members. For example, the adapter housing122may be a plastic housing, and the electronic component15may not be integrally injection molded into the plastic housing by way of an insert. Based on this, later descriptions that the adapter housing122is pre-disposed with a through hole1251, a blind hole1252, and a through hole1253, etc., in the present disclosure are the same as or similar to this, which will not be repeated herein. In some embodiments, the accommodation chamber124may also be obtained through a drilling operation after the adapter housing122has been molded, and the through hole1251, the blind hole1252, the through hole1253, etc., may also be obtained through the drilling operation after the adapter housing122has been molded.

In some embodiments, in combination withFIG.7, the electronic component15may be coupled to the main control circuit board13, so that the hook structure12can be electrically connected to the core module11. The adapter housing122may be plugged and fixed with the core housing111to realize a structural connection between the hook structure12and the core module11, which is simple and reliable. The plugging and fixing refers to that a portion of one of the adapter housing122and the core housing111is first inserted into the other along an assembly direction, and then plugged and fixed with the help of other limitation structures such as pins. An assembly direction of the limitation structure may not be parallel to the assembly direction. Alternatively, the plugging and fixing also refers to that one of the adapter housing122and the core housing111can be plugged and fixed without the aid of the limitation structure when a portion of one of the adapter housing122and the core housing111is extended into the other.

In some embodiments, in combination withFIGS.7,10, and16, the adapter housing122may be disposed with a first snap structure1221, and the core housing111may be disposed with a second snap structure1222. The first snap structure1221may extend into the core housing111, and snap with the second snap structure1222, so that the adapter housing122and the core housing111are snap-fixed. The first snap structure1221and the second snap structure1222may be directly plugged and fixed without the aid of other restriction structures, which is simple and reliable. In some embodiments, two first snap structures1221may be integrally disposed on the adapter housing122, and may be spaced apart in the thickness direction X. Two second snap structures1222may be integrally disposed on the core inner housing1111, and may be disposed in one-to-one correspondence with the two first snap structures1221.

In some embodiments, in combination withFIG.7, the earphone10may include a flexible circuit board16. A portion of the flexible circuit board16may be disposed within the accommodation chamber124to be connected to the electronic component15and extend into the core housing111, which in turn allows the electronic components15to be connected to the main control circuit board13through the flexible circuit board16. For example, the electronic component15may be soldered to one end of the flexible circuit board16through surface mounted technology (SMT), and another end of a circuit board of the flexible circuit board16and the main control circuit board13may be snapped through a board to board (BTB) connector. The loudspeaker112may be disposed to be connected to the flexible circuit board16in an extension path of the flexible circuit board16. For example, leads of the loudspeaker112may be soldered to a corresponding region of the flexible circuit board16. Therefore, the loudspeaker112may also be connected to the main control circuit board13through the flexible circuit board16, so that the leads of the loudspeaker112do not need to be extended to connect to the main control circuit board13, which simplifies an alignment structure of the earphone10, reducing the production cost.

In some embodiments, in combination withFIGS.16and15, the adapter housing122may be pre-disposed with the through hole1251in communication with the accommodation chamber124. The electronic component15may include an electrode terminal151. At least a portion of the electrode terminal151may be disposed within the through hole1251, and the electrode terminal151may include a retractable elastic component (e.g., a pogo-PIN) or a non-retractable rigid component (e.g., a metal pillar). An aperture of the through hole1251may be larger than an outer diameter of the electrode terminal151to facilitate subsequent installation of the electrode terminal151. In some embodiments, the electrode terminal151may also be integrally molded with the adapter housing122in the form of an insert. In some embodiments, the electrode terminal151may face the ear in the wearing state. Therefore, by making the electrode terminal151invisible in the wearing state, the appearance quality of the earphone10in the wearing state can be improved.

It should be noted that when the electrode terminal151is disposed as the retractable elastic component, such as the pogo-PIN, an extension direction of the electrode terminal151may be a direction where the electrode terminal151retracts. When the electrode terminal151is disposed as the non-retractable rigid component, such as the metal pillar, the extension direction may be a direction where an axis of the electrode terminal151is located.

In some embodiments, multiple electrode terminals151may be disposed according to actual use requirements, such as for charging, detecting, etc.

In some embodiments, the electrode terminal151may include a charging positive terminal1511and a charging negative terminal1512spaced apart from each other. The charging positive terminal1511and the charging negative terminal1512may be disposed within corresponding through holes1251, respectively, so as to facilitate the charging of the earphone10through the electrode terminal151. In some embodiments, only one of the charging positive terminal1511and the charging negative terminal1512may also be disposed on the adapter housing122, and the other may be disposed on another housing in the hook structure12(e.g., the battery housing123) or disposed on the core inner housing1111.

In some embodiments, the electrode terminal151may include a detection terminal1513spaced apart from the charging positive terminal1511and the charging negative terminal1512. The detection terminal1513may be used to perform detection functions, such as a charging detection, a detection of putting the earphone10into or out of the charging case, etc. In some embodiments, the detection terminal1513may also be replaced by an electronic component, such as a Hall sensor.

In some embodiments, viewed along the extension direction of the electrode terminal151, lines connecting each two of the charging positive terminal1511, the charging negative terminal1512, and the detecting terminal1513may form a triangle, such as a positive triangle.

In some embodiments, viewed along the extension direction of the electrode terminal151, the charging positive terminal1511, the charging negative terminal1512, and the detection terminal1513may be spaced apart from each other to arrange in a line section, such as a straight line section. A spacing between the charging positive terminal1511and the charging negative terminal1512may be larger than a spacing between the charging negative terminal1512and the detection terminal1513. For example, the charging negative terminal1512may be disposed between the charging positive terminal1511and the detection terminal1513, and the spacing between the charging positive terminal1511and the charging negative terminal1512may be larger than the spacing between the charging negative terminal1512and the detection terminal1513. As another example, the detection terminal1513may be disposed between the charging positive terminal1511and the charging negative terminal1512. In this way, when a space on the adapter housing122for disposing the electrode terminal151is limited, the spacing between the charging positive terminal1511and the charging negative terminal1512can be increased as much as possible to avoid short circuits between the charging positive terminal1511and the charging negative terminal1512.

In some embodiments, in combination withFIG.15, an outer side of the adapter housing122may be disposed with a boss126. The through hole1251may further penetrate through the boss126, so that the multiple electrode terminals151are exposed at the boss126, respectively. In this way, a localization of the adapter housing122that is not flat due to having a certain curvature can be made flat through the boss126to facilitate the dispose of the electrode terminals151. The charging positive terminal1511, the charging negative terminal1512, and the detecting terminal1513may be sequentially disposed at intervals along a length direction of the boss126.

In some embodiments, in combination withFIGS.15-17, the hook structure12may include a magnet127. The magnet127and the electrode terminal151may be exposed on a same side of the adapter housing122. That is, the magnet127and the electrode terminal151may be visible on the same side of the adapter housing122to make the magnet127closer to the outside world where an exposed end of the electrode terminal151faces, thereby shortening a spacing between the magnet127and a magnetic suction structure used to cooperate with the magnet127in a charging device (e.g., the charging case), or a spacing between the magnet127and the Hall sensor used to cooperate with the magnet127, which improves the reliability of functions, such as charging, detection, etc. The magnet127and the electrode terminal151may be disposed adjacent to each other to allow the magnet127to cooperate with the magnetic suction structure in the charging device (e.g., the charging case), such that the electrode terminal151cooperates with an electrode terminal in the charging device to facilitate charging. Correspondingly, the boss126may protrude out of the adapter housing122around the magnet127. That is, the magnet127may be lower than the boss126, so that the electrode terminal151is in contact with the electrode terminal in the charging device (e.g., the charging case). In the embodiment that the magnet127is used for detection in combination with the Hall sensor in the charging device (e.g., the charging case), the magnet127may be disposed adjacent to the electrode terminal151. Alternatively, the electrode terminal in the charging device (e.g., the charging case) used to cooperate with the electrode terminal151may be disposed adjacent to the Hall sensor, which reduces an area of the charging device (e.g., the charging case) used for carrying the electrode terminal and the Hall sensor.

In some embodiments, the hook structure12may include a flexible coating128. A hardness of the flexible coating128may be smaller than a hardness of the adapter housing122. The adapter housing122may be a plastic fabrication. The flexible coating128may be made of silicone, rubber, etc., and may be formed on the adapter housing122by injection molding, glue connection, etc. In some embodiments, the flexible coating128may cover the adapter housing122and the magnet127, such that the magnet127is not exposed and the electrode terminal151is exposed. That is, the magnet127may be invisible and the electrode terminal151may be visible. In this way, not only use needs of the electrode terminal151can be satisfied, but also the magnet127can be shielded from being worn out or affecting the appearance quality due to the exposure of the magnet127. In addition, the flexible coating128can be used to improve the comfort of the earphone10in the wearing state. A thickness of the flexible coating128may be smaller than a thickness of the adapter housing122.

In some embodiments, in combination withFIG.16, the adapter housing122may be pre-disposed with the blind hole1252. The blind hole1252may not be connected to the accommodation chamber124to increase the waterproof and dustproof performance of the accommodation chamber124. The magnet127may be disposed at least within the blind hole1252, and exposed through an open end of the blind hole1252. In this way, not only the thickness of the adapter housing122in a region where the magnet127is located can be reduced, but also the appearance quality of the earphone10in the region where the magnet127is located can be improved. In some embodiments, the blind hole1252may also be disposed as a through hole.

In some embodiments, in combination withFIG.15, viewed in the extension direction of the electrode terminal151, the multiple electrode terminals151may be spaced apart from each other in a line section, such as a straight line section or a zigzag segment. The magnet127may be located on either side of the line section. Alternatively, the magnet127may intersect with the line section, and at least a portion of the magnet127may be located between any two adjacent electrode terminals151. For example, a count of the magnet127may be one, and the magnet127may be integrally located on one side of the line section. Alternatively, the magnet127may intersect with the line section, and be integrally located between any two adjacent electrode terminals151. As another example, the count of the magnet127may be two. One magnet127may be integrally located on one side of the line section, and the other magnet127may be integrally located on the other side of the line section. As still another example, the count of the magnet127may be one. A portion of the magnet127may intersect with the line section and be located between any two adjacent electrode terminals151, and another portion may be located below the electrode terminal151in the extension direction.

In some embodiments, in combination withFIG.15, the multiple electrode terminals151may include the charging positive terminal1511, the charging negative terminal1512, and the detecting terminal1513arranged in the straight line section. The magnet127may be located on one side of the straight line section. In some embodiments, viewed along the extension direction of the electrode terminal151, a center of the magnet127may have a first distance, a second distance, and a third distance from centers of the charging positive terminal1511, the charging negative terminal1512, and the detection terminal1513, respectively. The third distance may be larger than the first distance and the second distance, respectively, so as to prioritize the charging reliability. It should be noted that in the embodiment that the hook structure12is disposed with the flexible coating128, in order to conveniently determine a relative position relationship between the magnet127, the charging positive terminal1511, the charging negative terminal1512, and the detection terminal1513, the flexible coating128can be removed first.

In some embodiments, in combination withFIGS.16-18, the electronic component15may include the electrode terminal151and a microphone152. The adapter housing122may be pre-disposed with the accommodation chamber124, the through hole1251, and the through hole1253. The through hole1251and the through hole1253may be in communication with the accommodation chamber124, respectively. Due to different roles of the electrode terminal151and the microphone152, the through hole1251and the through hole1253may be disposed on different side walls of the adapter housing122. Based on this, at least a portion of the electrode terminal151may be disposed within the through hole1251. The microphone152may be disposed within the accommodation chamber124and pick up sounds (e.g., user voice, environmental sounds) outside the earphone10through the through hole1253. In this way, by reasonably arranging a relative position between the electrode terminal151and the microphone152, a space of the accommodation chamber124can be fully used, thereby causing the structure of the earphone10to be more compact and smaller. In some embodiments, the earphone10may include a support assembly17. At least a portion of the support assembly17disposed within the accommodation chamber124. The support assembly17may support and fix the electrode terminal151and the microphone152on the side walls corresponding to the through hole1251and the through hole1253, respectively. In this way, the electrode terminal151and the microphone152can be prevented from separating from the adapter housing122. The waterproof and dustproof performance of the electronic component15can be improved, and the structure can be simple and reliable.

In some embodiments, in combination withFIG.18, the flexible circuit board16may include a first circuit board part161, a second circuit board part162, and a third circuit board part163of an integrated structure. The electrode terminal151may be soldered on the first circuit board part161, the second circuit board part162may be bent with respect to the first circuit board part161, and the microphone152may be soldered to the third circuit board part163and bent with respect to the second circuit board part162. In other words, after the flexible circuit board16has been bent twice, the first circuit board part161, the second circuit board part162, and the third circuit board part163may correspond to three sides of a six-sided structure, and each two of the three sides may be adjacent. An end of the second circuit board part162away from the third circuit board part163may be connected to the first circuit board part161, and other portions of the second circuit board part162may not be connected to the first circuit board part161. In this way, after the flexible circuit board16and the electrode terminal151and microphone152thereon are assembled in the adapter housing122, an operator can be allowed to first press the end of the second circuit board part162connected to the first circuit board part161, so that the second circuit board part162can flush with the first circuit board part161as much as possible to avoid the support assembly17subsequently assembled.

In some embodiments, the adapter housing122may include two housings whose parting surfaces are perpendicular to the extension direction of the electrode terminal151. The two housings may be snapped with each other to form the accommodation chamber124. The support assembly17may be integrally molded with one of the two housings, so as to support (or press) the electrode terminal151and the microphone152, respectively, when the two housings are snapped together. Alternatively, at least one of a first support member for supporting the electrode terminal151and a second support member for supporting the microphone152in the support assembly17may be independent of the adapter housing122, so as to support (or press) the electrode terminal151and the microphone152, respectively, when the two housings are snapped together. Alternatively, after the two housings are snapped together, the support assembly17may be assembled to support (or press) the electrode terminal151and microphone152, respectively.

In some embodiments, at least a portion of the adapter housing122corresponding to the accommodation chamber124may be an integral housing structure. At least one of the first support member for supporting the electrode terminal151and the second support member of the support assembly17for supporting the microphone152in the support assembly17may be independent of the adapter housing122to at least facilitate the assembly of the electrode terminal151.

In some embodiments, in combination withFIG.18, the support assembly17may be independent of the adapter housing122, and inserted into the accommodation chamber124. In this way, since the support assembly17, the electrode terminal151, and the microphone152are independent of the adapter housing122, the support assembly17, the electrode terminal151, and the microphone152may be assembled according to a certain sequence, which avoids unnecessary interference in structure, thereby improving the assembly efficiency.

In some embodiments, the first support member for supporting the electrode terminal151and the second support member for supporting the microphone152in the support assembly17may be independent of the adapter housing122, respectively. That is, the first support member and the second support member may be independent of each other to support (or press) the electrode terminal151and the microphone152, respectively. Therefore, the first support member and the second support member in the support assembly17can be designed differently according to actual needs.

In some embodiments, the support assembly17may be an integrally molded structural member. That is, the first support member for supporting the electrode terminal151and the second support member for supporting the microphone152in the support assembly17may be connected to each other, which simplifies the structure of the support assembly17, and avoids the first support member and the second support member being too small and difficult to assemble. The support assembly17may be fixed in a tight fit with a chamber wall of the accommodation chamber124after the support assembly17is inserted into place. That is, a process of insertion or extraction of the support assembly17may have a certain degree of damping, and the structure may be simple and reliable. Correspondingly, the chamber wall of the accommodation chamber124may be disposed with a guiding groove and a limitation groove which are fit with the support assembly17. In some embodiments, the support assembly17may be further in a glue connection to the chamber wall of the accommodation chamber124through the dispensing operation.

In some embodiments, in combination withFIGS.17and18, dimensions of at least a portion of the support assembly17and the accommodation chamber124in at least one reference direction perpendicular to an insertion direction (e.g., a direction indicated by arrows inFIGS.17and18) of the support assembly17with respect to the accommodation chamber124may be disposed to progressively reduce along the insertion direction, so that the support assembly17inserts into an interval region between the electrode terminal151and the microphone152. In other words, the dimension of at least a portion of the support assembly17in the at least one reference direction perpendicular to the insertion direction may be disposed to progressively reduce along the insertion direction, and the dimension of at least a portion of the accommodation chamber124in the same reference direction may be disposed to progressively reduce along the insertion direction. Trends of reduction of the support assembly17and the accommodation chamber124may be the same or similar, which facilitates the support assembly17to be tightly fitted and fixed with the chamber wall of the accommodation chamber124after being inserted in place.

In some embodiments, in combination withFIGS.16-18, the chamber wall of the accommodation chamber124may include a first chamber wall1241, a second chamber wall1242, and a third chamber wall1243. The first chamber wall1241and the second chamber wall1242may be disposed side by side with each other and spaced apart, and the third chamber wall1243may be used to connect the first chamber wall1241and the second chamber wall1242. The through hole1251may be disposed on the first chamber wall1241, and the through hole1253may be disposed on the third chamber wall1243. Correspondingly, the support assembly17may include a bottom plate171and a first side plate172connected to the bottom plate171. For example, the support assembly17may have an L-shaped structure. A main surface on one side of the bottom plate171may be disposed opposite the first chamber wall1241, and support the electrode terminal151. A main surface on one side of the first side plate172may be disposed opposite the third chamber wall1243, and support the microphone152. In this way, after the electrode terminal151and the microphone152are assembled in place, the support assembly17can be inserted into the accommodation chamber124along the insertion direction. After the support assembly17is inserted in place, the support assembly17can support the electrode terminal151and the microphone152through the bottom plate171and the first side wall, respectively.

In some embodiments, an orthographic projection of the microphone152on the first chamber wall1241may cover at least a portion of the electrode terminal151. For example, the microphone152may cover a portion of the charging positive terminal1511, which facilitates the structure to be more compact.

In some embodiments, dimensions of at least a portion of the bottom plate171and the accommodation chamber124in a first reference direction RD1that is perpendicular to the insertion direction and parallel to the main surface on the one side of the bottom plate171may be disposed to progressively reduce along the insertion direction. That is, one of a front end and a rear end of the bottom plate171in the insertion direction or a localization between the front end and the rear end may be disposed along the insertion direction, such that dimensions in the first reference direction RD1remain unchanged. Dimensions of the first side plate172and the accommodation chamber124in a second reference direction RD2that is perpendicular to the insertion direction and parallel to the main surface on the one side of the first side plate172may be disposed to remain unchanged along the insertion direction.

In some embodiments, dimensions of at least a portion of the first side plate172and the accommodation chamber124in the second reference direction RD2that is perpendicular to the insertion direction and parallel to the main surface on the one side of the first side plate172may be disposed to progressively reduce along the insertion direction. That is, one of a front end and a rear end of the first side plate172in the insertion direction or a localization between the front end and the rear end may be disposed along the insertion direction, such that dimensions in the second reference direction RD2remain unchanged. The dimensions of the bottom plate171and the accommodation chamber124in the first reference direction RD1that is perpendicular to the insertion direction and parallel to the main surface on the one side of the bottom plate171may be disposed to remain unchanged along the insertion direction.

It should be noted that for the support assembly17, the dimension of the bottom plate171in the first reference direction RD1may be simply regarded as a width of the bottom plate171, and the dimension of the first side plate172in the second reference direction RD2may be simply regarded as a height of the first side plate172.

In some embodiments, in combination withFIGS.16-18, the support assembly17may include a second side plate173connected to the bottom plate171. The second side plate173and the first side plate172may be disposed side by side with each other and spaced apart on a same side of the bottom plate171. The second side plate173may abut against the second chamber wall1242to provide a support force facing the electrode terminal151for the bottom plate171, which improves the support effectiveness of the support assembly17on the electrode terminal151. In the embodiment that the electrode terminal151includes the charging positive terminal1511and the charging negative terminal1512spaced apart from each other along a direction perpendicular to the insertion direction, the second side plate173may be disposed between the charging positive terminal1511and the charging negative terminal1512, so that the force on each part of the electrode terminal151is uniform, further improving the support effectiveness of the support assembly17on the electrode terminal151.

In some embodiments, in combination withFIGS.16-18, the chamber wall of the accommodation chamber124may include a fourth chamber wall1244. The fourth chamber wall1244may connect the first chamber wall1241and the second chamber wall1242, and be opposite to the third chamber wall1243. The first chamber wall1241and the second chamber wall1242may be disposed substantially as planar structures parallel to each other, and the third chamber wall1243and the fourth chamber wall1244may be disposed substantially as curved structures flared out from each other, so as to maximize a volume of the accommodation chamber124when a volume of the adapter housing122is limited. Correspondingly, the support assembly17may include a third side plate174connected to the bottom plate171. The first side plate172and the third side plate174may be respectively located on edges of two sides of the bottom plate171in a direction perpendicular to the insertion direction. The second side plate173may be located between the first side plate172and the third side plate174. The third side plate174may abut against the fourth chamber wall1244to provide a support force facing the microphone152for the first side plate172, thereby improving the support effectiveness of the support assembly17on the microphone152.

In some embodiments, with respect to the bottom plate171, a height of the second side plate173may be larger than the height of the first side plate172and a height of the third side plate174, respectively, so that the second side plate173abuts against the second chamber wall1242, and the third side plate174abuts against the fourth chamber wall1244. Since the second side plate173and the third side plate174are not in direct contact with either of the electrode terminal151and the microphone152, the second side plate173and the third side plate174may be used for guiding during the process that the support assembly17is inserted into the accommodation chamber124. Correspondingly, since the height of the second side plate173is relatively the highest, the support assembly17may include a reinforcement175connecting the second side plate173to the bottom plate171. The reinforcement175may be disposed on opposite sides of the second side plate173facing the first side plate172and the third side plate174.

In some embodiments, in combination withFIGS.15-17and9, the hook structure12may include an elastic metal wire121, the adapter housing122, the battery housing123, and a conductor129. Two ends of the elastic metal wire121and the conductor129may be connected to the adapter housing122and the battery housing123, respectively, so that the conductor129extends along the elastic metal wire121and is threaded within the adapter housing122and the battery housing123. In some embodiments, the conductor129may also be threaded within a predetermined threading channel after the elastic metal wire121is connected to the adapter housing122and the battery housing123. The battery14may be disposed within the battery housing123, and may be connected to the flexible circuit board16through the conductor129, which in turn allows the battery14to be connected to the main control circuit board13through the flexible circuit board16, which simplifies the alignment structure of the earphone10, thereby reducing the production cost. In other words, components (e.g., the electrode terminal151, the microphone152, the battery14, etc.) in the hook structure12may be connected to the main control circuit board13through the flexible circuit board16.

In some embodiments, the flexible coating128may at least further cover an exposed portion of the elastic metal wire121and the conductor129, and at least a portion of the battery123, so as to expose the conductor129, which can improve the appearance quality of the earphone10.

It should be noted that the adapter housing122may also be a portion of the core housing111. For example, the adapter housing122may be integrally molded with the core inner housing1111. As another example, a portion of the adapter housing122may be integrally molded with the core inner housing1111, and a remaining portion of the adapter housing122may be integrally molded with the core outer housing1112. A portion (e.g., an end of the elastic metal wire121away from the battery housing123, the battery housing123, etc.) of the hook structure12other than the adapter housing122may be fixedly connected (e.g., through a plug-in fixation) with the core module11having the adapter housing122at the adapter housing122. Correspondingly, positions of structural components (e.g., the electrode terminal151, the microphone152, the magnet127, etc.) are consequently adjusted, which will not be repeated herein.

Based on the relative descriptions, the present disclosure provides a housing assembly. The housing assembly may include a plastic housing, a metallic function pattern, and a silicone coating. The metallic function pattern may be disposed on an outer side of the plastic housing, and the silicone coating may be covered on a side of the metallic function pattern back from the plastic housing and a portion of the plastic housing that is not covered by the metallic function pattern by injection molding, glue connection, etc. In this way, compared to the metallic function pattern being disposed on an inner side of the plastic housing away from the silicone coating, the metallic function pattern can be disposed on the outer side of the plastic housing facing the silicone coating, so as to make the metallic function pattern farther away from the interference of other electronic components in the housing assembly or closer to a signal trigger source outside the housing assembly, thereby increasing the anti-interference and sensitivity of the metallic function pattern. A structure of the plastic housing may be the same as or similar to that of the core housing111or the core outer housing1112of the core housing111, and a structure of the silicone coating may be the same as or similar to that of the flexible coating1132, which will not be repeated herein.

In some embodiments, the metallic function pattern may be disposed as the antenna pattern1141or the touch pattern1142. The antenna pattern1141may be disposed on the outer side of the plastic housing, which may increase a spacing between the antenna pattern1141and other electronic components in the plastic housing. That is, the antenna headroom region can be increased, thereby increasing the interference immunity of the antenna pattern1141. By disposing the touch pattern1142on the outer side of the plastic housing, a spacing between the touch pattern1142and an external signal trigger source (e.g., the user's finger) may be shortened. That is, a touch spacing can be reduced, thereby increasing the sensitivity of the touch pattern1142to be triggered by the user.

In some embodiments, the metal functional pattern may include the antenna pattern1141and the touch pattern1142. The antenna pattern1141may surround the periphery of the touch pattern1142to make full use of the space of the outer side of the core outer housing1112. The antenna pattern1141may have the U-shape, and the touch pattern1142may have the square shape.

In some embodiments, a thickness of the silicone coating may be smaller than a thickness of the plastic housing, so as to further increase the interference immunity and sensitivity of the metal functional pattern and reduce the volume of the housing assembly while blocking the silicone coating and protecting the metal functional pattern.

In some embodiments, the housing assembly may serve as the core housing that accommodates the loudspeaker112. A relative position relationship between the plastic housing and the silicone coating may be the same or similar to that between the core housing111and the flexible coating1132, which will not be repeated herein.

In some embodiments, the housing assembly may be applied to other electronic devices, such as smart glasses, in addition to the earphone10. The electronic device may include the core module disposed with the loudspeaker112, the main control circuit board13, and the loudspeaker112and the battery14coupled to the main control circuit board13, respectively. The housing assembly may be used to accommodate at least one of the electronic components, such as the loudspeaker112, the main control circuit board13, the battery14, etc. The housing assembly may also be used to support the loudspeaker112in the electronic device to be a corresponding wearing position. It should be noted that for electronic devices based on a principle of bone conduction, such as earphones, smart glasses, etc., the loudspeaker112may be adaptively adjusted to be a bone-conducting loudspeaker, and a basic structure of the bone-conducting loudspeaker is well known to those skilled in the art, which will not be repeated herein.

The present disclosure provides a housing assembly. The housing assembly may include a first housing, the electrode terminal151, the magnet127, and the flexible coating128. The electrode terminal151and the magnet127may be exposed on a same side of the first housing. The hardness of the flexible coating128may be smaller than a hardness of the first housing, and the flexible coating may cover the first housing and the magnet127, such that the magnet127is not exposed and the electrode terminal151is exposed. In this way, compared to the magnet127being disposed in the first housing, the magnet127can be closer to the outside world where the exposed end of the electrode terminal151faces in the present disclosure, thereby shortening the spacing between the magnet127and the magnetic suction structure used to cooperate with the magnet127in the charging device (e.g., the charging case), or the spacing between the magnet127and the Hall sensor used to cooperate with the magnet127, which improves the reliability of functions, such as charging, detection, etc. Therefore, the housing assembly may be applied to a powered device, such as the earphone10, the smart glasses, etc., and may be applied to the charging device, such as the charging case. In other words, the electronic device may include both the powered device and the charging device. For the convenience of description, the first housing may be the adapter housing122.

In some embodiments, the first housing may be disposed with the through hole1251and the blind hole1252. At least a portion of the electrode terminal151may be disposed within the through hole1251, and at least a portion of the magnet127may be disposed within the blind hole1252and exposed through the open end of the blind hole1252. In this way, not only the thickness of the adapter housing122in a region where the magnet127is located can be reduced, but also the appearance quality of the earphone10in the region where the magnet127is located can be improved. In some embodiments, the blind hole1252may also be disposed as a through hole.

In some embodiments, the outer side of the first housing may be disposed with the boss126. The boss126may be disposed adjacent to the magnet127, and protrude out of the first housing around the magnet127. The through hole1251may further penetrate through the boss126, so that the multiple electrode terminals151are exposed at the boss126, respectively. In this way, a localization of the adapter housing122that is not flat due to having a certain curvature can be made flat through the boss126to facilitate the disposal of the electrode terminals151. The boss126may have a long strip shape, with a simple and reliable structure.

In some embodiments, the housing assembly may include the flexible circuit board16. The electrode terminal151may be connected to the flexible circuit board16to simplify the alignment of the electrode terminal151. The first housing may be disposed with the accommodation chamber124. At least a portion of the flexible circuit board16may be disposed within the accommodation chamber124. The through hole1251may be connected to the accommodation chamber124, and the blind hole1252may not be connected to the accommodation chamber124, so as to improve the waterproof and dustproof performance of the first housing.

In some embodiments, the housing assembly may include a second housing, the elastic metal wire121, and the conductor129. Two ends of the elastic metal wire121and the conductor129may be connected to the first housing and second housing, respectively, such that the conductor129extends along the elastic metal wire121and is threaded within the first housing and the second housing. For the convenience of description, the second housing may be the battery housing123. In some embodiments, the battery14may be disposed in the second housing, and the battery14may be connected to the flexible circuit board16through the conductor129. That is, both the battery14and the electrode terminal151may be connected to the flexible circuit board16to simplify the alignment. Correspondingly, the flexible coating128may at least further cover the elastic metal wire121and the conductor129, so as to expose the conductor129.

In some embodiments, the housing assembly may be used for the earphone10, and may include a third housing for accommodating the loudspeaker112. The third housing may be plugged and fixed to the first housing. For the convenience of description, the third housing may be the core housing111.

The present disclosure provides a housing assembly. The housing assembly may include the first housing, the electrode terminal151, the microphone152, and the support assembly17. The first housing may be disposed with the accommodation chamber124, the through hole1251, and the through hole1253. The through hole1251and the through hole1253may be in communication with the accommodation chamber124, respectively. The through hole1251and the through hole1253may be disposed on different side walls of the first housing. At least a portion of the electrode terminal151may be disposed within the through hole1251. The microphone152may be disposed within the accommodation chamber124, and pick up the sounds outside the housing assembly through the through hole1253. In some embodiments, the support assembly17may be disposed within the accommodation chamber124. The support assembly17may support and fix the electrode terminal151and the microphone152on the side walls corresponding to the through hole1251and the through hole1253, respectively. In this way, the electrode terminal151and the microphone152can be prevented from separating from the adapter housing122. The waterproof and dustproof performance of the electronic component15can be improved, and the structure can be simple and reliable. For the convenience of description, the first housing may be either the adapter housing122, or the core housing111, or a housing structure integrally molded by the core housing111and the adapter housing122.

In some embodiments, the support assembly17may be independent of the first housing and inserted in the accommodation chamber124.

In some embodiments, the support assembly17may be an integrally molded structural member.

In some embodiments, the housing assembly may be used for the earphone10, and may include the third housing for accommodating the loudspeaker112. The third housing may be plugged and fixed to the first housing. The first housing may be the adapter housing122, and the third housing may be the core housing111.

In some embodiments, the housing assembly may be applied to other electronic devices, such as smart glasses, in addition to the earphone10. The electronic device may include the main control circuit board13, and the loudspeaker112and the battery14coupled to the main control circuit board13, respectively. The housing assembly may be used to accommodate at least one of the electronic components, such as the loudspeaker112, the main control circuit board13, the battery14, etc. The housing assembly may also be used to support the loudspeaker112in the electronic device to be a corresponding wearing position. It should be noted that for electronic devices based on a principle of bone conduction, such as earphones, smart glasses, etc., the loudspeaker112may be adaptively adjusted to be a bone-conducting loudspeaker, and a basic structure of the bone-conducting loudspeaker is well known to those skilled in the art, which will not be repeated herein.

In some embodiments, in combination withFIGS.19and20, each of two earphones10may include the core module11and the hook structure12connected to the core module11. The hook structure12may be a structure bent or curved into a hook shape. Alternatively, the hook structure12may be a rod structure that is not parallel to an extension direction of the core module11, and the rod structure may cooperate with the core module11to play a “hook” role that the earphone can be worn in the human ear. Correspondingly, the charging case20may include a lower housing assembly21. The lower housing assembly21may be disposed with two profiling grooves211for accommodating the two earphones10. Each profiling groove211may include a first profiling groove region2111corresponding to the core module11and a second profiling groove region2112corresponding to the hook structure12. Second profiling groove regions2112of the two profiling grooves211may be disposed intersecting with each other. In this way, when the two profiling grooves211are accommodating the two earphones10, respectively, the hook structures12of the two earphones10may overlap with each other, e.g., stacked on top and bottom, which can reduce a volume of the charging case20and make the charging case20compact, thereby being convenient for the user to carry. It should be noted that overlapping with each other refers to that there is at least an overlapping region between each other, including partial overlapping and complete overlapping.

In some embodiments, in combination withFIG.19, a projection of the first profiling groove region2111along a first reference direction may overlap with a projection of the second profiling groove region2112along the first reference direction, and a projection of the first profiling groove region2111along a second reference direction may overlap with a projection of the second profiling groove region2112along the second reference direction. The first reference direction may be perpendicular to the second reference direction. In this way, when the earphones10are placed into the profiling grooves211, a projection length of the charging case20occupied by the second profiling groove region2112along the first reference direction can overlap a projection length of the charging case20occupied by the first profiling groove region2111along the first reference direction, and a projection length of the charging case20occupied by the second profiling groove region2112along the second reference direction can overlap a projection length of the charging case20occupied by the first profiling groove region2111along the second reference direction. Therefore, the volume of the charging case20can be accordingly reduced, which is convenient for the user to carry. A reduction amount of the volume of the charging case20may relate to the projection length in the first reference direction and an overlapping degree of projections in the second reference direction. In other words, when each earphone10is placed in each profiling groove211, a projection of the core module11of the earphone10in the first reference direction may overlap with a projection of the hook structure12in the first reference direction, and a projection of the core module11in the second reference direction may overlap with the projection of the hook structure12in the second reference direction. It should be noted that the first reference direction and the second reference direction are two directions orthogonal to each other and are perpendicular to a thickness direction of the charging case20. The first reference direction in the present disclosure may have a plurality of different implementations. Descriptions of different implementations of the first reference direction are provided below. The implementation of the first reference direction may be at least one of the following implementations, which will not be repeated.

Implementation 1), in some embodiments, when the two profiling grooves211are spaced apart in the lower housing assembly21, the first reference direction may be an arrangement direction (i.e., a connecting line of geometrical centers of the two profiling grooves211) of the two profiling grooves211or a direction perpendicular to the arrangement direction.

Implementation 2), in some embodiments, when an upper housing assembly24opens or closes the charging case20by rotating with respect to the lower housing assembly21, the first reference direction may refer to a direction perpendicular or parallel to a rotation axis of the upper housing assembly24with respect to the lower housing assembly21.

Implementation 3), in some embodiments, when the two profiling grooves211are disposed asymmetrically, the first reference direction may be a direction perpendicular or parallel to a symmetry axis of the two profiling grooves211.

In some embodiments, the first reference direction may also be a direction of a connecting line of same feature points of the two profiling grooves211or a direction perpendicular to the direction of the connecting line.

It should be noted that the charging case20includes a thickness direction and the profiling grooves211include a depth direction, in combination withFIG.24, the thickness direction of the charging case20and the depth direction of the profiling grooves211in the present disclosure may refer to a direction perpendicular to a contact plane between the charging case20and a horizontal platform surface after the charging case20is placed smoothly on the horizontal platform surface. The thickness direction of the charging case20and the depth direction of the profiling grooves211in the following embodiments may be the same, which will not be repeated. It should be noted that in an actual manufacturing process, there is an error in verticality due to process reasons. In other words, in an actual product, two objects in the present disclosure being perpendicular to each other refers to that a perpendicularity between the two objects is within an allowable tolerance range. The perpendicularity is a positional tolerance, and the specific tolerance range may be determined by referring to relevant national standards. The symmetry is similar to the perpendicularity, which will not be repeated. On the other hand, the projection overlap in the present disclosure includes complete projection overlap and partial projection overlap.

In some embodiments, in combination withFIG.19, a projection of a first portion2112aof the second profiling groove region2112in the first reference direction and the projection of the first profiling groove region2111in the first reference direction may overlap. In this way, when the earphones10are placed into the profiling grooves211, a dimension of the charging case20occupied by the first portion2112aof the second profiling groove region2112and a dimension of the charging case20occupied by the first profiling groove region2111may overlap. In other words, the charging case20can accommodate the first portion2112aof the second profiling groove region2112and the first profiling groove region2111in the second reference direction in a first dimension. The first dimension may be smaller than a sum of a dimension of the first portion2112aof the second profiling groove region2112in the second reference direction and a dimension of the first profiling groove region2111in the second reference direction. Therefore, on the premise that the charging case20can accommodate the earphones10, the dimension of the charging case20in the second reference direction can be reduced, which is convenient for the user to carry.

In some embodiments, in the second reference direction perpendicular to the first reference direction, a projection of a second portion2112bof the second profiling groove region2112and the projection of the first profiling groove region2111may overlap. In this way, when the earphones10are placed into the profiling grooves211, a dimension of the charging case20occupied by the second portion2112bof the second profiling groove region2112and the dimension of the charging case20occupied by the first profiling groove region2111may overlap. In other words, the charging case20can accommodate the second portion2112bof the second profiling groove region2112and the first profiling groove region2111in the first reference direction in a second dimension. The second dimension may be smaller than a sum of a dimension of the second portion2112bof the second profiling groove region2112in the first reference direction and the dimension of the first profiling groove region2111in the first reference direction. Therefore, on the premise that the charging case20can accommodate the earphones10, the dimension of the charging case20in the first reference direction can be reduced, which is convenient for the user to carry.

In some embodiments, the projection of the first profiling groove region2111in the first reference direction and the projection of the first portion2112aof the second profiling groove region2112in the first reference direction may overlap, and the projection of the first profiling groove region2111in the second reference direction and the projection of the second portion2112bof the second profiling groove region2112in the second reference direction may overlap. In this way, by adjusting an overlapping ratio of the projections of the first profiling groove region2111and the second profiling groove region2112in the first reference direction and an overlapping ratio of the projections of the first profiling groove region2111and the second profiling groove region2112in the second reference direction, the reasonableness of the dimensions of the charging case20occupied in the first reference direction and the second reference direction can be improved, so that a shape of the charging case20can be relatively square, which not only can improve the appearance of the charging case20, but also can allow the charging case20to be stored more easily in a pocket or backpack by the user.

For instance, in some embodiments, the first portion2112aof the second profiling groove region2112may correspond to the battery housing123in the hook structure12, and the second part2112bof the second profiling groove region2112may correspond to an elastic part of the hook structure12. The projection of the first profiling groove region2111in the first reference direction overlapping with the projection of the first portion2112aof the second profiling groove region2112in the first reference direction refers to that when the earphones10are placed into the profiling grooves211, a projection of the battery housing123in the first reference direction overlaps with a projection of the core module11in the first reference direction. The projection of the second portion2112bof the second profiling groove region2112overlapping with the projection of the first profiling groove region2111refers to that when the earphones10are placed into the profiling grooves211, a projection of the elastic part in the second reference direction overlaps with a projection of the core module11in the second reference direction.

In some embodiments, in the second reference direction, the second portion2112bof the second profiling groove region2112may be disposed on a side of the first profiling groove region2111away from an edge of the lower housing assembly21that is adjacent to the first profiling groove region2111. In other words, the second profiling groove regions2112of the two profiling groove regions211may be disposed close to each other. In this way, when the two earphones10are accommodated, the hook structures12in the two earphones10may be disposed close to each other compared with a portion of the core module11with a relatively small thickness. The second profiling groove regions2112of the two profiling grooves211may be disposed intersecting with each other, so that when the two profiling grooves211accommodate the earphones10, respectively, the hook structures12of the two earphones10overlap with each other. Since the hook structures12of the earphones10are thinner than the core module11, after the two hook structures12are close to each other and overlap with each other, the utilization of the space of the charging case20can be further improved, which can reduce the volume of the charging case20.

In some embodiments, in combination withFIG.20, the hook structure12may include the battery housing123and an elastic part connecting the battery housing123and the core module11. When the two second profiling groove regions2112are disposed for accommodating the two earphones10, elastic parts of the earphones10may overlap with each other. Since the elastic part is thinner than the battery housing123, by overlapping the elastic parts of the two earphones10, a space occupied by the hook structure12in the thickness direction of the charging case20can be reduced, which reduces the volume of the charging case20. The two elastic parts may have a plurality of overlapping manners. For example, edges of the two elastic parts that are close to each other may overlap to form an overlapping region. Alternatively, each elastic part may have a curved shape, and the two elastic parts may overlap with each other. Since each of the two elastic parts has a certain volume, two disjointed overlapping regions may be formed, and geometric centers of the two overlapping regions may form two overlapping points. In some embodiments, the two profiling grooves211may be mirror symmetrical with a line connecting the two overlapping points as an axis of symmetry. A direction of the line connecting the two overlapping points may be parallel to the first reference direction or the second reference direction.

In some other embodiments, the second profiling groove regions2112of the two profiling grooves211may be disposed independently to each other. In this way, the two earphones10can be relatively independently accommodated in the charging case20, and the use of the two earphones10will not be affected by each other, which facilitates to use of the two earphones10by the user individually.

In some embodiments, the charging case20may include a main control circuit board221disposed within the lower housing assembly21and electrode terminals222disposed on the main control circuit board221. A plurality of sets (e.g., two sets) of electrode terminals222may be disposed according to need(s). Correspondingly, when either earphone10is placed into the charging case20, the electrode terminal151in the earphone10may be in one-to-one contact with the electrode terminals222in the charging case20to satisfy requirement(s) of functions, such as charging, detection, etc. Correspondingly, the electrode terminals222may include a power supply positive terminal and a power supply negative terminal, and may further include a detection terminal. Lines connecting each two of the power supply positive terminal, the power supply negative terminal, and the detection terminal may form a triangle, such as a positive triangle. Alternatively, the power supply positive terminal, the power supply negative terminal, and the detection terminal may be spaced apart along a straight line, such as spaced apart from each other and be collinear.

In some embodiments, in combination withFIGS.7and24, an electrode terminal in the charging case20may be a first electrode terminal (i.e., the electrode terminal222), and an electrode terminal in the earphone10may be a second electrode terminal (i.e., the electrode terminal151). The first electrode terminal may be exposed in the profiling groove211. When the earphone10is accommodated in the profiling groove211, the second electrode terminal may be connected to the first electrode terminal.

For instance, in some embodiments, the first electrode terminal may be disposed in the first profiling groove region2111, and the second electrode terminal may be disposed on the core module11. Since the core module11is a rigid structure with respect to the hook structure12, and a hardness of the core module11is relatively high, a relatively smooth and stable contact surface can be provided for the connection of the first electrode terminal and the second electrode terminal, thereby improving the stabilization degree of the connection of the first electrode terminal and the second electrode terminal. In some embodiments, the core module11may include a magnetic member (e.g., a first magnetic suction member in the other embodiments disclosed herein), and the charging case20may include a magnetic suction structure that cooperates with the magnetic member in the core module11. The stabilization degree of the connection between the first electrode terminal and the second electrode terminal may be improved under the magnetic suction cooperation between the magnetic member in the core module11and the magnetic suction structure in the charging case20.

In some embodiments, the hook structure12may include the elastic part and a rigid part connecting the core module11and the elastic part. The elastic part may at least include the elastic metal wire121, and the elastic part may have an elastic deformation. The rigid part may include the adapter housing122and the electrode terminal151, the magnet127, etc., in the adapter housing122. The first electrode terminal may be exposed to the second profiling groove region2112, and the second electrode terminal may be disposed on an inner side of the rigid part (a side surface of the rigid part facing the profiling groove211when the earphone10is accommodated in the profiling groove211, referring to MS inFIG.7). With such arrangement, the second electrode terminal and related mechanical and circuit structures can be disposed in the hook structure12, simplifying the structure of the core module11. A hardness of the rigid part may be larger than a hardness of the elastic part. By disposing the second electrode terminal in the rigid part, the success rate and stability of the connection between the second electrode terminal and the first electrode terminal can be improved when the earphones10are accommodated in the charging case20.

In some embodiments, the inner side of the core module11(referring to IS inFIG.7) and the inner side of the rigid part (referring to MS inFIG.7) may be inclined to each other. By setting the inner side of the core module11and the inner side of the rigid part to be inclined to each other, the adaptation of the earphones10to human ears can be improved. For instance, with such arrangement, the rigid part can bypass the tragus to connect with the elastic part disposed at a rear side of the ear while enabling the core module11to extend into the cavity of auricular concha, thereby reducing the interference between the earphone10and the ear, and increasing the comfort of the earphone10in the wearing state. In some embodiments, the profiling groove211of the charging case20may be disposed so that a region of the first profiling groove region2111for accommodating the core module11and a region of the second profiling groove region2112for accommodating the rigid part are inclined towards each other, thereby improving the adaptability with the earphone10. Viewed in the thickness direction of the charging case20, compared to setting the region of the first profiling groove region2111for accommodating the core module11and the region of the second profiling groove region2112for accommodating the rigid part to be parallel to each other, by disposing the region of the first profiling groove region2111for accommodating the core module11and the region of the second profiling groove region2112for accommodating the rigid part to be inclined to each other, a dimension of a projection of the charging case20in the thickness direction can be reduced, which is convenient to carry. Compared to setting the region of the first profiling groove region2111for accommodating the core module11and the region of the second profiling groove region2112for accommodating the rigid part to be perpendicular to each other, by disposing the region of the first profiling groove region2111for accommodating the core module11and the region of the second profiling groove region2112for accommodating the rigid part to be inclined to each other, a required dimension of the charging case20in the thickness direction can be reduced, and the user's operability in storage of the earphones10can be improved at the same time. In summary, by disposing the region of the first profiling groove region2111for accommodating the core module11and the region of the second profiling groove region2112for accommodating the rigid part to be inclined to each other, the adaptability between the charging case20and the earphone10can be improved. In some embodiments, the thickness dimension, the length dimension, and the width dimension of the charging case20may be optimized, so that the charging case20can be easily carried by the user, and ergonomic requirements of the charging case20can be satisfied.

In some embodiments, referring toFIG.24, an extension direction of the first electrode terminal may be inclined with respect to the thickness direction of the charging case20(referring to an angle β inFIG.24). With such arrangement, on the one hand, a space occupied by the first electrode terminal in the thickness direction of the charging case20can be decreased, which reduces the volume of the charging case20. On the other hand, when the earphones10are accommodated in the profiling grooves211, the extension direction of the first electrode terminal may match with an extension direction of the second electrode terminal, thereby increasing the success rate of the connection between the first electrode terminal and the second electrode terminal. In some embodiments, the angle β may be within a range of 10 degrees to 45 degrees. For example, the angle β may be within a range of 30 degrees to 40 degrees. As another example, the angle β may be within a range of 15 degrees to 25 degrees. As still another example, the angle β may be 20 degrees.

In some embodiments, a normal direction of the inner side surface IS of the core module11and the extension direction of the second electrode terminal may be inclined to each other, which can facilitate the connection of the first electrode terminal and the second electrode terminal, thereby improving the success rate of the connection.

For instance, when the earphone10is placed into the profiling groove211, the extension direction of the first electrode terminal may be inclined with respect to the thickness direction of the charging case20, which causes a contact area between the first electrode terminal and the second electrode terminal to gradually increase with the placement of the earphone10, so that the change of the contact area between the first electrode terminal and the second electrode terminal is not instantaneous. Therefore, the success rate of the connection of the first electrode terminal and the second electrode terminal can be improved, and the stability of the first electrode terminal and the second electrode terminal after the connection can be improved.

In some embodiments, a depth of the first profiling groove region2111may gradually increase in a direction away from the first electrode terminal. When the earphone10is placed into the profiling groove211, the core module11may fit with a depth variation region of the first profiling groove region2111, which can guide and position the core module11, thereby facilitating the core module11to be placed into the first profiling groove region2111.

In some embodiments, the first electrode terminal may be exposed at an end of the second profiling groove region2112near the first profiling groove region2111. A depth of the region of the second profiling groove region2112for accommodating the rigid part in a direction away from the first profiling groove region2111may gradually increase. Therefore, the first profiling groove region2111and the region of the second profiling groove region2112for accommodating the rigid part may form a conical structure with a certain angle matching with the rigid part of the earphone10and the core module11in the thickness direction of the charging case20, so as to serve as a guide to facilitate the fit of the earphone10with the profiling groove211when the earphone10is placed into the charging case20. When the earphone10is accommodated in the profiling groove211, the conical structure may be used to limit the earphone10, for example, limit the movement of the earphone10with respect to the profiling groove211, thereby improving the stability of the earphone10when the earphone10is accommodated in the charging case20.

In some embodiments, a first support platform2113may be disposed at a bottom of the second profiling groove region2112, and the first electrode terminal may be disposed on the first support platform2113. The earphone10may be disposed with a second support platform176, and the second electrode terminal may be disposed on the second support platform176. Merely by way of example, as shown inFIG.7, the second support platform176may be disposed on a rigid part of the earphone10. The second support platform176may also be disposed at other positions of the core module11or the hook structure12, which is not limited herein. When the earphone10is accommodated in the profiling groove211, the second support platform176and the first support platform2113may abut against each other to cooperate. By disposing the first support platform2113and the second support platform176, a structural strength of the earphone10at the second electrode terminal and a structural strength of the profiling groove211at the first electrode terminal can be increased, thereby improving the stability of the connection of the first electrode terminal and the second electrode terminal. At the same time, when the first electrode terminal and the second electrode terminal are connected, the first support platform2113and the second support platform176can bear more wear, which reduces the wear of the first electrode terminal, the second electrode terminal, and other parts during repeated use of the earphone10, thereby improving the service life of the earphones10and the charging case20.

In some embodiments, a contact surface between the first support platform2113and the second support platform176may be a plane. In some embodiments, a normal direction of the contact surface may be inclined with respect to the thickness direction of the charging case20. In this way, after the first support platform2113and the second support platform176abut against each other to cooperate, the first electrode terminal and the second electrode terminal can also be connected more smoothly. With such arrangement, a contact area between the first support platform2113and the second support platform176can gradually increase with the placement of the earphone10, so that the change of the contact area between the first support platform2113and the second support platform176is not instantaneous the first support platform2113and the second support platform176, thereby improving the stability of the abutting and cooperation between the first support platform2113and the second support platform176, and improving the success rate of the connection of the first electrode terminal and the second electrode terminal. In some embodiments, the contact surface between the first support platform2113and the second support platform176and a bottom wall of the second profiling groove region2112may be inclined to each other, so that the first support platform2113and the second support platform176form a step structure, thereby facilitating the abutting and cooperation between the first support platform2113and the second support platform176.

In some other embodiments, a normal direction of the contact surface between the first support platform2113and the second support platform176may be parallel to the extension direction of the first electrode terminal. With such arrangement, the contact surface between the first electrode terminal and the second electrode terminal can be parallel to the contact surface between the first support platform2113and the second support platform176, and in the process of gradually placing the earphone10into the profiling groove211, the connection between the first electrode terminal and the second electrode terminal can be relatively smooth, thereby reducing the sense of damping in the process of cooperation between the two support platforms.

In some other embodiments, the normal direction of the contact surface between the first support platform2113and the second support platform176may be inclined with respect to the extension direction of the first electrode terminal. In this way, the contact surface between the first electrode terminal and the second electrode terminal may form a step structure with respect to the contact surface between the first support platform2113and the second support platform176, so as to position and limit during the process of cooperation between the first electrode terminal and the second electrode terminals, thereby improving the stability of the connection between the first electrode terminal and the second electrode terminal.

In some embodiments, in combination withFIGS.20and9, the hook structure12may include the elastic part. The elastic part may connect the core module11and the battery housing123. The elastic part may be a portion of the elastic metal wire121exposed to the adapter housing122and the battery housing123. The two second profiling groove regions2112may be disposed such that the elastic parts of the two earphones10overlap with each other. In this way, after one of the two earphones10is first placed into the profiling groove211, the other one may also be placed into the profiling groove211. The earphone10that is placed in first may undergo a certain degree of deformation to enable the earphone10that is placed in later to be better placed into the lower housing assembly21.

In some embodiments, viewed directly above the charging case20, such as by placing the charging case20on a desktop first and then viewing the charging case20from a top view, the elastic part of the hook structure12may have an arc shape. The elastic parts of the two earphones10may overlap with each other to form two overlapping points (e.g., as shown by OP1and OP2inFIG.20), and the two profiling grooves211may be mirror symmetrical with a line connecting the two overlapping points (i.e., a line section OP1OP2) as the axis of symmetry, so as to improve the reasonableness of the distribution of the two profiling grooves211, thereby improving the appearance quality of the charging case20.

In some embodiments, regions of the two second profiling groove regions2112located between the two overlapping points may be a portion of the lower housing assembly21. That is, the two second profiling groove regions2112may form an isolated island at their confluence, which limits the degree of freedom of either earphone10when placed into the profiling groove211. In other words, the regions of the two second profiling groove regions2112that are surrounded by the hook structure12and located between the two overlapping points may form the isolated island.

In some embodiments, two earphones10may be used to be worn on left and right ears of the user, respectively. The core modules11of the two earphones10may be disposed on both sides of the first reference direction, respectively. With such arrangement, viewed from the first reference direction (i.e., a direction where the user opens the charging case20in a positive direction), the earphone10for wearing on the left ear may be accommodated in the left side with respect to the user, and the earphone10for wearing on the right ear may be accommodated on the right side with respect to the user to facilitate the user to use and accommodate the earphones10within the charging case20. In some embodiments, the two profiling grooves211may be mirror symmetrical with the line connecting the two overlapping points as an axis of symmetry. The direction of the line connecting the two overlapping points may be parallel to the first reference direction.

In some embodiments, the regions of the two second profiling groove regions2112that are surrounded by the hook structure12located between the two overlapping points may integrate with each other. That is, the isolated island may not exist, so that the two second profiling groove regions2112integrate with each other at a convergence, which facilitates the earphones10to be easily placed into the corresponding profiling grooves211.

In some embodiments, in combination withFIGS.20and9, the hook structure12may include the rigid part disposed between the elastic part and the core module11. The rigid part may connect the core module11and the elastic part, and the rigid part may include the adapter housing122and the electrode terminal151, the magnet127, etc. in the adapter housing122. Correspondingly, the lower housing assembly21may include a limiting structure212, and the limiting structure212may be disposed within or adjacent to the profiling groove211. After either earphone10is placed into the profiling groove211, the limiting structure212may form a pressing force facing a bottom of the profiling groove211on the rigid part of the earphone10, so as to maintain a relative position between the earphone10and the lower housing assembly21. At least a portion of the elastic part of the same earphone10may form a cantilevered structure with respect to an action point of the limiting structure212on the rigid part. That is, at least a portion of the earphone10may not be in contact with the bottom of the profiling groove211(in particular, the second profiling groove region2112). In this way, after one of the two earphones10is placed into the profiling groove211first, when the other earphone10is placed into the profiling groove211later, the elastic part of the first-placed earphone10can be more likely to deform to a certain extent, which facilitates the earphones10to be easily placed into the corresponding profiling grooves211.

In some embodiments, the limiting structure212may be a bump that interferes with the rigid part of the earphone10when either earphone10is placed into the profiling groove211and taken out of the profiling groove211. The bump may be disposed adjacent to the profiling groove211.

In some embodiments, a count of the bump may be two, and the two bumps may be disposed on opposing sides of the profiling groove211. During a process of placing either earphone10into the profiling groove211, the rigid part of the earphone10may be clamped into a space between the two bumps under a pressing force applied by the user.

In some embodiments, the charging case20may include a first magnetic suction structure231and a second magnetic suction structure232disposed within the lower housing assembly21. The electrode terminal222may be disposed between the first magnetic suction structure231and the second magnetic suction structure232. After either earphone10is placed into the profiling groove211, the first magnetic suction structure231and a first magnetic suction member within the earphone10may form a first magnetic suction matching pair, and the second magnetic suction structure232and a second magnetic suction member within the earphone10may form a second magnetic suction matching pair. The first magnetic suction matching pair and the second magnetic suction matching pair may cause the electrode terminals222and the electrode terminals151in one-to-one contact. In this way, since the electrode terminal222and the electrode terminal151are located between the first magnetic suction matching pair and the second magnetic suction matching pair after being paired up, the contact between the earphone10and the charging case20can be improved. It should be noted that with the action of the limiting structure212, the contact between the earphone10and the charging case20can be further ensured.

In some embodiments, the limiting structure212may be a position limiting groove in communication with the profiling groove211. The hook structure12may be further moved into the position limiting groove after either earphone10is placed into the profiling groove211. That is, the earphone10may have a certain displacement as a whole. The position limiting groove may be disposed within the profiling groove211.

In some embodiments, the charging case20may include the first magnetic suction structure231disposed within the lower housing assembly21. After either earphone10is placed into the profiling groove211, the first magnetic suction structure231and the first magnetic suction member within the earphone10may form the first magnetic suction matching pair (e.g., two magnets of opposite sex attracting each other), so as to guide the hook structure of the earphone10to further move into the position limiting groove. The bottom of the profiling groove211may be disposed with a guiding surface used for guiding the hook structure of the earphone10to the position limiting groove. For example, a depth of a section of the second profiling groove region2112near the first profiling groove region2111may be larger than a depth of the first profiling groove region2111. That is, there is a height difference between the section of the second profiling groove region2112and the first profiling groove region2111, and the profiling groove211may be disposed as an inclined plane in a region having the height difference for transition, so as to form the guiding surface. Correspondingly, the position limiting groove may also be located in the section of the second profiling groove region2112near the first profiling groove region2111.

In some embodiments, the charging case20may include the second magnetic suction structure232disposed within the lower housing assembly21, and the electrode terminal222may be disposed between the first magnetic suction structure231and the second magnetic suction structure232. After either earphone10is placed into the profiling groove211, the second magnetic suction structure232and the second magnetic suction member within the earphone10may form the second magnetic suction matching pair, (e.g., two magnets of opposite sex attracting each other), so as to guide the hook structure of the earphone10together with the first magnetic suction matching pair to further move into the position limiting groove, and increase the power for further moving the earphone10into the position limiting groove. Similarly, the first magnetic suction matching pair and the second magnetic suction matching pair may cause the electrode terminals222and the electrode terminals151in one-to-one contact. In this way, since the electrode terminal222and the electrode terminal151are located between the first magnetic suction matching pair and the second magnetic suction matching pair after being paired up, the contact between the earphone10and the charging case20can be improved. It should be noted that with the action of the limiting structure212, the contact between the earphone10and the charging case20can be further ensured.

It is to be noted that the first magnetic suction member may be the loudspeaker112within the core module11, for instance, a magnetic circuit system of the loudspeaker112. The second magnetic suction member may be the magnet127disposed on the rigid part of the earphone10.

Usually, when the earphone10is placed into the charging case20, the success rate of the earphone10into the charging case20may be reduced if the hook structure12deforms or affects the stability of the placement of the earphone10. For example, the core module11of the earphone10may be accommodated in the first profiling groove region2111, and the hook structure12may be accommodated in the second profiling groove region2112. However, since the hook structure12has elasticity, during the process of placing the hook structure12into the second profiling groove region2112, the hook structure12may not correspond well to a shape of the second profiling groove region2112due to previously existing deformation of the use or action deformation under the action of inertial force, so that the hook structure12is not easily placed into the profiling groove region211. At the same time, a placement relationship between the core module11and the first profiling groove region2111may be unstable. To improve the above technical problems, the following embodiments may be provided.

In some embodiments, in combination withFIG.20, by disposing a certain movable gap between the core module11and a side wall of the first profiling groove region2111, and a certain moveable gap between the hook structure12and a side wall of the second profiling groove region2112, the profiling groove211may provide a sufficient space to allow the hook structure12to exist or deform to a certain extent during the process of placing the earphone10into the profiling groove211, which ensures that the core module11and the hook structure12are smoothly placed into the first profiling groove region2111and the second profiling groove region2112, respectively, with less intervention by the user, thereby improving the success rate and the placement stability of the earphone into the charging case20. In some embodiments, since one end of the hook structure12is connected to the core module11, and another end is disposed in a cantilever state, a portion of the hook structure12away from the core module11may be regarded as a distal end of a cantilever beam. Considering that the portion of the hook structure12away from the core module11generates a larger deformation than other portions during the process of placing the earphone10into the profiling groove211, and the core module11only needs a smaller movable gap than the hook structure12at the same time, the core module11can be only placed into the first profiling groove region2111. An excessively large movable gap may not be conducive to the optimization of the size of the charging case20, and may cause the placement of the core module11in the charging case to be unstable and prone to wobbling and rattling.

In some embodiments, when the earphone10is placed into the profiling groove211, by disposing a movable gap between the portion of the hook structure12away from the core module11and the side wall of the second profiling groove region2112(referring to a side wall2111cinFIG.20) to be larger than the movable gap between the core module11and the side wall of the first profiling groove region2111, the first profiling groove region2111can be placed into the core module11smoothly, and the second profiling groove region2112can provide a larger movable space for the hook structure12, thereby further improving the success rate of the earphone10being placed into the charging case20and the stability of the placing of the earphone10, and facilitating the optimization of the dimension of the charging case20. When the hook structure12is accommodated in the second profiling groove region2112, deformation may still occur due to wobbling or stress, and a dimension of the movable gap between the hook structure12and the side wall of the second profiling groove region2112may change. However, the change may not result in the disappearance of the movable gap. In some embodiments, the dimension of the movable gap between the portion of the hook structure12away from the core module11and the side wall of the second profiling groove region2112may be within a range of 0.5 to 1.5 mm. For example, the dimension of the movable gap may be within a range of 1 to 1.3 mm. For instance, the dimension of the movable gap may be 1.2 mm. By disposing the dimension of the movable gap in such a manner, the success rate of placing the hook structure12into the second profiling groove region2112can be increased, and a relatively small impact can be applied to the dimension of the charging case20.

In some embodiments, the dimension of the movable gap between the core module11and the side wall of the first profiling groove region2111may be within a range of 0.05 to 0.2 mm. For example, the dimension of the movable gap may be within a range of 0.07 to 0.15 mm. For instance, the dimension of the movable gap may be 0.1 mm. By disposing the dimension of the movable gap in such a manner, the core module11can be stably accommodated in the first profiling region2111, which can position and limit the accommodation of the earphone10in the profiling groove211, and improve the contact stability of the electrode terminal.

In some embodiments, the portion of the hook structure12away from the core module11may include the battery housing123for housing the battery. The battery housing123may be disposed in the portion of the hook structure12away from the core module11. The hook structure12may also include the elastic part connecting the core module11and the battery housing123. The battery housing123may have a larger size than the elastic part, so that the elastic part can surround the user's ear to hang the earphone10, and the battery housing123may support the ear from the rear side of the ear, thus improving the stability of the earphone10in the wearing state. The movable gap between the battery housing123and the side wall of the second profiling groove region2112may be larger than the movable gap between the core module11and the side wall of the first profiling groove region2111, which can increase the success rate of placing the battery housing123into the second profiling groove region2112, and facilitate the accommodation of the earphone10. In some embodiments, when the earphone10is accommodated in the profiling groove211, a movable gap between the elastic part and the side wall of the second profiling groove region2112may be larger than the movable gap between the core module11and the side wall of the first profiling groove region2111, which can improve the success rate of placing the elastic part into the second profiling groove region2112, and facilitate the accommodation of the earphone10.

In some embodiments, the hook structure12may further include the rigid part connecting the elastic part and the core module11. Since the rigid part may be used to dispose the electrode terminal151or the second magnetic suction member, the hardness of the rigid part may be larger than the hardness of the elastic part, and the rigid part may have a relatively high requirement for the stability. When the earphone10is accommodated in the profiling groove211, the movable gap between the elastic part and the side wall of the second profiling groove region2112may be larger than a movable gap between the rigid part and the side wall of the second profiling groove region2112. In this way, the elastic part can be placed into the second profiling groove region2112, and the stability of the rigid part accommodated in the second profiling groove region2112can be improved, so that the rigid part can cooperate with the core module11, thereby increasing the stability of the earphone10accommodated within the profiling groove211, and improving the stability and reliability of the second magnetic suction member or the contact of the electrode terminals.

In some embodiments, the charging case20may at least include an electrode terminal for charging, and the electrode terminal may not be disposed on the battery housing123. It can be understood that the battery housing123is at an end of the hook structure12, which generates a relatively great degree of deformation. The electrode terminal disposed on the battery housing123is not favorable for matching with the electrode terminal in the lower housing assembly21. For instance, the electrode terminal may not be disposed on the battery housing123, but may be disposed on a structure on the earphone10that generates a relatively small degree of deformation, for example, the core module11or the rigid part, which facilitates the matching between the electrode terminals.

In some embodiments, in combination withFIG.19, the lower housing assembly21may be disposed with the limiting structure. During the process of placing the earphone10into the profiling groove211, the core module11may be accommodated in the first profiling groove region2111through the limiting structure. For example, the limiting structure may be a clamping structure, and the core module11may be accommodated in the first profiling groove region2111by means of a clamping cooperation with the limiting structure. As another example, the limiting structure may be a magnetic suction structure, and the core module11may be placed into the first profiling groove region2111by means of a magnetic cooperation with the limiting structure. For instance, the first profiling groove region2111may also be disposed with the first magnetic suction structure231, and the core module11may be disposed with the first magnetic suction member. When the core module is placed into the first profiling groove region2111, the first magnetic suction member and the first magnetic suction structure231may magnetically cooperate with each other. The placement of the core module11within the first profiling groove region2111through the magnetic suction may be found in the descriptions of the above embodiments, which will not be repeated herein. The core module11can be stably accommodated in the first profiling groove region2111in the manner described above, which can limit the movement of the earphone10within the charging case20, and improve the stability of the matching between the electrode terminals.

In some embodiments, in combination withFIGS.25and26, the charging case20may further include an upper housing assembly24. When the charging case20is in a closed state, the upper housing assembly24may cooperate with the lower housing assembly21. The upper housing assembly24may be disposed with a limiting member245. The limiting member245may abut against the charging case20when the charging case20is in the closed state. In this way, when the charging case20is closed, the limiting member245can apply a pressure on the hook structure12, thereby limiting the movement of the hook structure12in the thickness direction of the charging case20. In some embodiments, a friction may also be generated between the limiting member245and the hook structure12, thereby limiting the movement of the hook structure12in other directions to reduce abnormal noise due to the movement of the hook structure12while reducing the wear of the earphone10and the charging case20.

A count of limiting members245may be one, two, or multiple. In some embodiments, the count of limiting members245may be one, and the limiting member245may abut against the hook structures12of the two earphones10when the charging case20is closed. In this way, the movements of the two hook structures12can be simultaneously limited by one limiting member245. In some embodiments, the count of limiting members245may be two, and two limiting members245may limit the movements of the two hook structures12of the earphones10, respectively, when the charging case20is closed.

In some embodiments, the hook structure12may include the battery housing123for housing the battery. The limiting member245may abut against the battery housing123when the charging case20is closed. The battery housing123may be a relatively large portion of the hook structure12. The limiting member245may improve the stability of the hook structure12when accommodated in the charging case20by limiting the movement of the battery housing123. In some embodiments, the core module11may be accommodated in the first profiling groove region2111by means of clamping, magnetic suction, etc., to limit the degree of freedom of the core module11. In this way, when the earphone10is accommodated in the profiling groove211, the degrees of freedom of both the core module11and the hook structure12of the earphone10may be limited, which limits the degree of freedom of the movement of the earphone10to a relatively great extent, thereby preventing the earphone10from wobbling inside the charging case20. In some embodiments, wear of the charging case20and the earphone10can be avoided, improving the service life of the charging case20and the earphone10.

In some other embodiments, the movable gap between the battery housing123and the side wall of the second profiling groove region2112may be larger than the movable gap between the core module11and the side wall of the first profiling groove region2111. The beneficial effect resulting from such a setting can be found in the description of the above embodiments, which will not be repeated herein. With a relatively large movable gap between the battery housing123and the side wall of the second profiling groove region2112, the success rate of placing the earphone10into the charging case20can become relatively high. However, the hook structure12may be caused to be more susceptible to wobbling. On this basis, in some embodiments, by disposing the limiting member245to abut against the battery housing123when the charging case20is closed, the success rate of placing the earphone10can be improved, and the wobbling of the hook structure12can be reduced.

In some embodiments, when the earphone10is accommodated in the profiling groove211of the charging case20, the first magnetic suction member of the core module11may cooperate with the first magnetic suction structure of the lower housing assembly21, which can limit the degree of freedom of the core module11, thereby reducing the wobbling of the core module11. Furthermore, by disposing the limiting member245to abut against the hook structure12, the wobbling of the hook structure12can be reduced, thereby reducing the overall wobbling of the earphone10.

In some embodiments, the lower housing assembly21may include the position limiting structure212, and the limiting structure212may be disposed within or adjacent to the profiling groove211. After either earphone10is placed into the profiling groove211, the limiting structure212may form a pressing force facing a bottom of the profiling groove211on the rigid part of the earphone10, so as to maintain a relative position between the earphone10and the lower housing assembly21, thereby limiting the degree of freedom of the earphone10and reducing the wobbling of the earphone10within the charging case20. Furthermore, by disposing the limiting member245to abut against the hook structure12, the wobbling of the hook structure12can be reduced, thereby reducing the overall wobbling of the earphone10.

In some embodiments, the limiting member245may be a flexible structure. For example, a material of the limiting member245may include a material such as silicone or rubber. Shore hardness of the limiting member245may be within a range of 20 to 50. With such arrangement, the limiting member245can deform when abutting against the hook structure12. On the one hand, the wear of the limiting member245on the hook structure12can be reduced. On the other hand, the force applied by the limiting member245on the hook structure12can be more uniform, so that the limiting member245can be more fit to the shape of the hook structure12, thereby further limiting the hook structure12from moving in a plurality of directions, reducing the wobbling of the earphone10within the profiling groove211, and reducing abnormal noise due to the movement.

In some other embodiments, the limiting member245may include an abutting part and a retracting part. The retracting part may connect the abutting part and the upper housing assembly24. When the charging case20is closed, the retracting part may cause the abutting part to abut against the hook structure12through elastic expansion and contraction. In other words, the retracting part can provide an elastic force when the abutting part abuts against the hook structure12, so that the abutting part can apply a pressure on the hook structure12to limit the wobbling of the hook structure12. For instance, the retracting part may include a structure such as a spring, a torsion spring, etc.

In some embodiments, a thickness of the limiting member245may be within a range of 1.2 to 2 mm. For example, the thickness of the limiting member245may be 1.2 mm, 1.5 mm, or 2 mm. If the thickness of the limiting member245is less than 1.2 mm, the limiting member245may not be able to sufficiently interfere with the hook structure12to generate sufficient pressure to limit the movement of the hook structure12. If the thickness of the limiting member245is larger than 2 mm, the limiting member245may generate too much pressure on the hook structure12, so that the hook structure12continues to deform when the hook structure12is accommodated, which in turn causes the hook structure12to lose its original shape, affecting the user's wearing experience.

In some embodiments, the first portion2112aof the second profiling groove region2112may be used to accommodate a portion (e.g., the battery housing123) of the hook structure12. When the charging case20is in the closed state, projections of the first portions2112aof the two second profiling groove regions2112in the thickness direction of the charging case20may at least partially cover a projection of the limiting member245in the thickness direction of the charging case20. With such arrangement, at least a portion of the limiting member245can abut against the hook structure, and a limiting region of the limiting member245can not extend beyond a region where the first portion2112aof the second profiling groove region2112is located, which can reduce redundancy that may be generated by the limiting member245, thereby reducing the cost.

In some embodiments, in combination withFIG.26, the limiting member245may be a single arcuate structure that abuts against the two hook structures12. A length (referring to L inFIG.26) of a projection of the limiting member245in the first reference direction perpendicular to an axis of a shaft mechanism25may be within a range of 20 to 24 mm. For example, the length of the projection of the limiting member245in the first reference direction may be within a range of 21 to 23 mm. As another example, the length of the projection of the limiting member245in the first reference direction may be within a range of 22 to 22.5 mm. If the length of the projection of the limiting member245in the first reference direction is less than 20 mm, a contact area between the limiting member245and each of the hook structures12may be reduced, which may even cause the limiting member245to be unable to simultaneously abut against the two hook structures12, resulting in the loss of the limiting capability of the limiting member245to limit the two hook structures12at the same time. If the length of the projection of the limiting member245in the first reference direction is larger than 24 mm, the limiting member245may still have redundancy in the length except for the portion of the limiting member245that abuts against the two hook structures12, and the redundancy in the length may increase the production cost.

In some embodiments, a length (referring to H inFIG.26) of a projection of the limiting member245in the second reference direction perpendicular to the first reference direction may be within a range of 3 to 7 mm. For example, the length of the projection of the limiting member245in the second reference direction may be within a range of 3 to 6 mm. As another example, the length of the projection of the limiting member245in the second reference direction may be within a range of 5 to 6 mm. If the length of the projection of the limiting member245in the second reference direction is less than 3 mm, an area where the limiting member245abuts against the two hook structures12may be reduced, which weakens the ability of the limiting member245to limit the movement of the hook structure12. If the length of the projection of the limiting member245in the second reference direction is larger than 7 mm, the area of the limiting member245in contact with the hook structure12may be relatively large, which can excessively increase the pressure on the hook structure12, causing the hook structure12to deform other than desired.

In some embodiments, the upper housing assembly24may be disposed with an accommodation groove244for accommodating the earphone10when the charging case20is closed. The accommodation groove244may accommodate a portion of the earphone10that is not accommodated by the profiling grooves211when the upper housing assembly24is closed on the lower housing assembly21, thereby allowing the upper housing assembly24to close tightly with the lower housing assembly21. When the charging case20is in the closed state, side walls of the accommodation groove244may also limit the position of the earphone10to limit the movement of the earphone10within the charging case20. In some embodiments, the limiting member245may be disposed within the accommodation groove244. The limiting member245may cooperate with the accommodation groove244, such that when the earphone10is accommodated in both the profiling groove211and the accommodation groove244, the limiting member245can apply the pressure on the hook structure12to limit the hook structure12from moving, reducing the generation of the wobbling and abnormal noise of the hook structure12.

In some embodiments, in combination withFIG.20, the second profiling groove regions2112of the two profiling grooves211are disposed intersecting with each other, so that when the two profiling grooves211accommodate the earphones10, respectively, the hook structures12of the two earphones10overlap with each other, and form a first overlapping point OP1near the shaft mechanism25and a second overlapping point OP2away from the shaft mechanism25. With such arrangement, the hook structures12of the two earphones10can be placed overlappingly, which reduces the dimension of the charging case20. In a direction of a line connecting the first overlapping point OP1and the second overlapping point OP2, regions where the limiting member245abuts against the hook structures12may be located in a direction where the second overlapping point OP2is back from the first overlapping point OP1. The hook structures12may overlap with each other when the hook structures12are accommodated in the profiling groove211, and the overlapping portion may limit the degree of freedom of the movement of a portion of the hook structures12. By disposing the regions where the limiting member245abuts against the hook structures12on a side where the second overlapping point OP2is back from the first overlapping point OP1, the degree of freedom of the hook structures12can be further reduced, thereby further limiting the movement of the hook structures12. In some embodiments, when the charging case20is closed, the limiting member245may abut against a portion corresponding to the second overlapping point OP2of the hook structures12. In this way, since the hook structures12overlap with each other at the second overlapping point OP2, thicknesses of the two hook structures12can be superimposed. The limiting member245can abut against the portion corresponding to the second overlapping point OP2, so that the hook structures12can have a relatively small thickness and the production costs can be reduced while limiting the degree of freedom of the hook structures12.

In some embodiments, when the charging case20is in the closed state, a distance between the limiting member245and a side wall of the upper housing assembly24near the second overlapping point OP2may be within a range of 15 to 20 mm. With such arrangement, the limiting member245can abut against the portion of the hook structures12near the second overlapping point OP2. Regions of the two hook structures12near the second overlapping point OP2may have an overlapping portion, so that the region has a relatively high height in the thickness direction of the charging case20, thereby reducing the thickness of the limiting member245. If a distance between the limiting member245and an edge of the lower housing assembly21near the second overlapping point OP2is less than 15 mm, the limiting member245may be relatively far away from the second overlapping point OP2, and the thickness of the limiting member245needs to be increased to be able to abut against the hook structures12. If the distance between the limiting member245and the edge of the lower housing assembly21near the second overlapping point OP2is larger than 20 mm, the area of the limiting member245that abuts against the hook structures12may be reduced, thereby weakening the limiting effectiveness.

In some embodiments, in combination withFIGS.21and22, the charging case20may include the upper housing assembly24and the shaft mechanism25connecting the upper housing assembly24and the lower housing assembly21to enable the charging case20to be opened or closed. The shaft mechanism25may include a lower fixing seat251integrally molded with the lower housing assembly21, an upper fixing seat252integrally molded with the upper housing assembly24, and a shaft253. The lower fixing seat251may extend into the upper housing assembly24, which in turn is pivotally connected to the upper fixing seat252through the shaft253. In some embodiments, the shaft mechanism25may include a reinforcement member254connected to the lower fixing seat251. A structural strength of the reinforcement member254may be larger than that of the lower fixing seat251. The shaft253may be further penetrated through the reinforcement member254to provide structural reinforcement to the shaft mechanism25. The reinforcement member254and the lower fixing seat251may be an integrally molded structural member, such as integrally molded by a metal insert injection molding operation. Alternatively, the reinforcement member254and the lower fixing seat251may be two separate structural members and connected by a glue connection, a screw connection, a clamping connection, or the like, or any combination thereof.

In some embodiments, the shaft mechanism25may include an elastic member255. One end of the elastic member255may be connected to the lower housing assembly21, for example, connected to the lower fixing seat251. Another end of the elastic member255may be connected to the upper housing assembly24, so as to maintain the charging case20in the open state or the closed state. During the opening or closing process of the charging case20, the elastic member255may be elastically deformed to provide a certain sense of damping. A portion of the sense of damping may originate from a frictional resistance of the shaft253when the shaft253rotates with a structure connected to the shaft253.

In some embodiments, in combination withFIG.21, the elastic member255may be disposed as a Z-type torsion spring. A basic structure of the Z-type torsion spring is well known to those skilled in the art, which will not be repeated herein. One of the lower fixing seat251or the upper housing assembly24may be disposed with a mounting hole2411, and the other may be disposed with a mounting groove2511. For example, the mounting hole2411may be disposed on an upper housing body241and located between two upper fixing seats252in an extension direction of the shaft253, and the mounting groove2511may be disposed on the lower fixing seat251and located between two sleeve parts2542in the extension direction of the shaft253. In this way, during the process of installing the elastic member255, one end of the elastic member255can extend into the mounting hole2411along an axial direction of the mounting hole2411firstly, and then another end of the elastic member255can be inserted into the mounting groove2511along a direction perpendicular to an axial direction of the mounting groove2511, so as to reduce an amount of deformation of the elastic member255in the process of installing, thereby maintaining the reliability of the elastic member255. In some embodiments, the mounting hole2411and the mounting groove2511may be disposed in a through-hole structure along their axial directions, respectively.

In some embodiments, in combination withFIG.21, two upper fixing seats252may be spaced apart along the extension direction of the shaft253. The lower fixing seat251may be disposed between the two upper fixing seats252, and respectively spaced apart from the two upper fixing seats252, which can support the shaft253. The reinforcement member254may include a connecting portion2541connected to the lower fixing seat251and two sleeve parts disposed at intervals along the extension direction of the shaft253. The two sleeve parts2542may be disposed in a spacing region between the lower fixing seat251and the two upper fixing seats252, respectively. Correspondingly, the shaft253may be inserted within the lower fixing seat251, the two sleeve parts2542, and the two upper fixing seats252.

In some embodiments, in combination withFIG.22, the lower housing assembly21may include a lower housing body213and a lower housing liner214disposed on an inner side of the lower housing body213. The lower fixing seat251and the lower housing body213may be integrally molded plastic parts, and the reinforcement member254may be a metal part. The connecting portion2541may be disposed between the lower housing body213and the lower housing liner214, such that the reinforcement member254is not exposed at least when the charging case20is in the closed state. Correspondingly, the profiling groove211, the limiting structure212, etc., may be disposed on the lower housing liner214. The main control circuit board221(and the electrode terminals222, the first magnetic suction structure231, and the second magnetic suction structure232, etc., on the main control circuit board221) may be disposed between the lower housing body213and the lower housing liner214. In some embodiments, the upper housing assembly24may include an upper housing body241and an upper housing liner242disposed on an inner side of the upper housing body241. The upper fixing seat252and the upper housing body241may be an integrally molded plastic part.

Compared to the related technique that the upper housing assembly24is connected to the lower housing assembly21through a metal connecting member (i.e., the upper housing assembly24and the lower housing assembly21can not be connected together after the removal of the metal connecting member, and the metal connecting member must be exposed), in the present disclosure, the upper housing assembly24and the lower housing assembly21can be still connected together after the removal of the reinforcement member254, and the reinforcement member254is not exposed, which can reduce the cost of the charging case20and maintain the consistency of the appearance.

In some embodiments, in combination withFIGS.28-31, the charging case20may include the upper housing assembly24and the shaft mechanism25connecting the upper housing assembly24and the lower housing assembly21, so as to open or close the charging case20. The charging case20may further include a position limiting mechanism. The position limiting mechanism may be used to limit a rotation angle of the upper housing assembly24with respect to the lower housing assembly21when the charging case20is in the open state. In other words, the position limiting mechanism can limit a further relative rotation of the upper housing assembly24with respect to the lower housing assembly21when the upper housing assembly24is rotated to a predetermined angle. It should be noted that an angle at which the upper housing assembly24opens with respect to the lower housing assembly21refers to an angle (referring to an angle α inFIG.27) between a lower surface of the lower housing assembly21and an upper surface of the upper housing assembly24. By disposing the position limiting mechanism, the angle at which the upper housing assembly24opens with respect to the lower housing assembly21can be limited, thereby reducing the risk of damage to a housing structure of the charging case20due to over-rotation of the upper housing assembly24, the wear on a surface of the charging case20caused by the housing being abutted, etc.

In some embodiments, the position limiting mechanism may be connected to the upper housing assembly24and the lower housing assembly21, respectively, thereby limiting the angle at which the upper housing assembly24opens with respect to the lower housing assembly21. For example, the position limiting mechanism may include two connecting rods. The two connecting rods may be hinged connected to each other, and hinged connected to the upper housing assembly24and the lower housing assembly21, respectively. When the upper housing assembly24is rotated to the predetermined angle with respect to the lower housing assembly21, the two connecting rods may be located in a straight line, thereby limiting the further rotation of the upper housing assembly24with respect to the lower housing assembly21. The two connecting rods may be rotated with respect to each other when the charging case20is transformed from the open state to the closed state, and a portion connected to the upper housing assembly24and a portion connected to the lower housing assembly21may be close to each other. In other words, the two connecting rods can limit the rotation of the upper housing assembly24with respect to the lower housing assembly21toward the open state, and but do not limit the rotation toward the closed state.

In some embodiments, the position limiting mechanism may include a first position limiting member271and a second position limiting member272. The second position limiting member272may be connected to the upper housing assembly24, and may follow the movement of the upper housing assembly24. The first position limiting member271may be connected to the lower housing assembly21, and may follow the movement of the lower housing assembly21. The first position limiting member271and the second position limiting member272may abut against each other when the upper housing assembly24is rotated to the predetermined angle with respect to the lower housing assembly21, thereby limiting the further rotation of the upper housing assembly24with respect to the lower housing assembly21. In some embodiments, the predetermined angle may be within a range of 90 degrees to 110 degrees. If the predetermined angle is less than 90 degrees (i.e., if an angle between the upper housing assembly24and the lower housing assembly21is an acute angle), the upper housing assembly24may tend to reclose under the action of gravity or an elastic member of the shaft mechanism25, which is not conducive for the user to take and store the earphones10. In addition, the predetermined angle less than 90 degrees may cause the user to interfere with the upper housing assembly24when the user takes and stores the earphone10, affecting the using experience of the user. If the predetermined angle is larger than 110 degrees, the angle at which the upper housing assembly24opens with respect to the lower housing assembly21may be too large, which enhances a strength requirement for the shaft mechanism25and the position limiting mechanism. If the angle at which the upper housing assembly24opens with respect to the lower housing assembly21is too large, a length of the charging case20when opened may be increased. The length of the charging case20when opened refers to a distance between a farthest end of the upper housing assembly24from the shaft mechanism and a farthest end of the lower housing assembly21from the shaft mechanism. For example, in an extreme operating condition where the charging case20is dropped or squeezed, a relatively long length of the charging case20when opened can enhance a moment being applied to the upper housing assembly24and the lower housing assembly21, thereby improving the risk of damage to the charging case20.

In some embodiments, the upper housing assembly24may be disposed with a slot247on an edge near the lower housing assembly21. The shaft mechanism25may include the shaft253bridged at two ends of the slot247. The upper housing assembly24may rotate around the shaft253with respect to the lower housing assembly21. In some embodiments, the predetermined angle described above may be less than the angle at which the upper housing assembly24opens with respect to the lower housing assembly21when an edge of the slot247abuts against an outer wall of the lower housing assembly21. It can be understood that the slot247can facilitate the rotation of the upper housing assembly24with respect to the lower housing assembly21. The rotation of the upper housing assembly24with respect to the lower housing assembly21may also be limited when the edge of the slot247abuts against the outer wall of the lower housing assembly21. However, due to materials and structures of the upper housing assembly24and the lower housing assembly21, the abutting and limiting manner of the edge of the slot requires a relatively high structural strength of the housing of the charging case20, which raises the costs of the process and material. By adding the position limiting mechanism, the angle at which the upper housing assembly24opens with respect to the lower housing assembly21can be limited, which can increase a position limiting strength, while reducing the requirement for the structural strength of the charging case and the costs.

In some embodiments, when the edge of the slot247abuts against the outer wall of the lower housing assembly21, pressure may be applied on the outer wall of the lower housing assembly21, so that the outer wall of the lower housing assembly21is easily indented, which affects the appearance. In addition, an abutment region of the lower housing assembly21where the indentation of the outer wall of the lower housing assembly21occurs may have a stress concentration when subjected to a force, and a strength of the lower housing assembly21may be affected. In order to avoid the stress concentration in the abutment region, the predetermined angle may be disposed to be less than the angle at which the upper housing assembly24opens with respect to the lower housing assembly21when the edge of the slot247abuts against the outer wall of the lower housing assembly21. Therefore, when the upper housing assembly24is opened to the predetermined angle with respect to the lower housing assembly21, the further rotation may be limited by the position limiting mechanism, avoiding the abutment of the edge of the slot247with the outer wall of the lower housing assembly21. For example, the angle at which the upper housing assembly24opens with respect to the lower housing assembly21when the edge of the slot247abuts against the outer wall of the lower housing assembly21may be 120 degrees, and the predetermined angle may be 110 degrees. When the angle at which the upper housing assembly24opens with respect to the lower housing assembly21is 110 degrees, the position limiting mechanism may limit the further rotation of the upper housing assembly24, thereby avoiding the abutment of the edge of the slot247with the outer wall of the lower housing assembly21.

In some embodiments, the shaft mechanism25may include a first fixing seat256mounted to the lower housing assembly21and a second fixing seat257mounted to the upper housing assembly24. The shaft253may be threaded through the first fixing seat256and the second fixing seat257. By disposing the first fixing seat256and the second fixing seat257, the strength of the shaft mechanism25can be increased. The position limiting mechanism may include the first position limiting member271connected to the first fixing seat256and the second position limiting member272connected to the second fixing seat257. The first position limiting member271and the second position limiting member272may abut against each other when the upper housing assembly24is rotated to the predetermined angle with respect to the lower housing assembly21, thereby limiting the further rotation of the upper housing assembly24with respect to the lower housing assembly21.

In some embodiments, in combination withFIGS.28and29, an extension direction of the first position limiting member271and an extension direction of the second position limiting member272may be perpendicular to each other. With such arrangement, the success rate of the first position limiting member271and the second position limiting member272abutting against each other can be increased. In some embodiments, the extension direction of one of the first position limiting member271or the second position limiting member272may be disposed along an axial direction of the shaft253, and the extension direction of the other may be disposed along a radial direction of the shaft253. In this way, a relative rotation between the first position limiting member271and the second position limiting member272can match with the rotations of the upper housing assembly24and the lower housing assembly21with respect to the shaft253, so that the first position limiting member271and the second position limiting member272can limit the rotations of the upper housing assembly24and the lower housing assembly21with respect to the shaft253.

In some embodiments, the first position limiting member271and the first fixing seat256may be an integrally molded metal part. Alternatively, the second position limiting member272and the second fixing seat257may be an integrally molded metal part. Alternatively, the first position limiting member271and the first fixing seat256may be an integrally molded metal part, and the second position limiting member272and the second position limiting member257may be an integrally molded metal part. By disposing the first fixing seat256and the second fixing seat257as a metal part, volumes of the first fixing seat256and the second fixing seat257can be relatively small while the strength of the first fixing seat256and the second fixing seat257can be sufficient, which can reduce the occupation of space in the charging case20, thereby reducing the dimension of the charging case20. Since the first position limiting member271is integrally molded with the first fixing seat256or the second position limiting member272is integrally molded with the second fixing seat257, when the first position-limiting member271and the second position-limiting member272resist the force, torques of the members may be transmitted to the charging case20through the first fixing seat256or the second fixing seat257. A connection structure of the first fixing seat256and the second fixing seat257with the charging case20may have a high connection strength. Therefore, the first position limiting member271being integrally molded with the first fixing seat256or the second position limiting member272being integrally molded with the second fixing seat257can increase the stability when the first position limiting member271and the second position limiting member272are abutting.

In some embodiments, in combination withFIGS.30-32, one of the first position limiting member271or the second position limiting member272may be disposed with a position limiting groove2721, and another of the first position limiting member271or the second position limiting member272may cooperate with the position limiting groove2721when the charging case20is opened to limit the rotation of the upper housing assembly24with respect to the lower housing assembly21. In some embodiments, the second position limiting member272may be disposed with the position limiting groove2721, and the first position limiting member271may extend into the position limiting groove2721after the upper housing assembly24is opened to a first angle with respect to the lower housing assembly21. The first angle may be less than the predetermined angle. When the upper housing assembly24is rotated to the predetermined angle with respect to the lower housing assembly21, the first position limiting member271may abut against a wall of the position limiting groove2721. Through the abutment cooperation between the first position limiting member271and the position limiting groove2721, when the position limiting mechanism is subjected to a force in another direction, the wall of the position limiting groove2721can also limit the first position limiting member271, thereby increasing the strength and reliability of the position limiting mechanism. When the charging case20is rotated from the open state to the closed state, the first position limiting member271may be separated from the position limiting groove2721, thereby reducing the charging case20from being affected by the position limiting mechanism when the charging case20is closed. In some other embodiments, the first position limiting member271may be disposed with the position limiting groove2721, and the second position limiting member272may extend into the position limiting groove2721after the upper housing assembly24is opened to the first angle with respect to the lower housing assembly21.

In some embodiments, with the charging case20is in the open state, an included angle between the extension direction of the first position limiting member271and the extension direction of the second position limiting member272may be an obtuse angle. With such arrangement, when a length of the position limiting groove2721is relatively short, the first position limiting member271or the second position limiting member272can smoothly extend into and separate from the position limiting groove2721. If the included angle between the extension direction of the first position limiting member271and the extension direction of the second position limiting member272is a right angle or an acute angle, the length of the position limiting groove2721needs to be relatively long to ensure that the first position limiting member271or the second position limiting member272can smoothly separate from the position limiting groove2721, which increases an overall volume of the shaft mechanism25, thereby occupying more space in the charging case20.

In some embodiments, the connection and fit of the lower housing assembly21, the position limiting mechanism, and the shaft mechanism25may be found in the following exemplary descriptions. The lower housing assembly21may include two first support parts215spaced apart along an axial direction of the shaft253and a first reinforcement part216disposed between the two first support parts215. The first reinforcement part216refers to a reinforcement rib structure or a structure with a thickness that is thicker than other side walls of the charging case20. The first reinforcement part216may be used to enhance the structural strength of the charging case20, so that the charging case20may stably carry the shaft mechanism25and the position limiting mechanism. Each of the two first support parts215may be disposed with a first inset groove2151. The first fixing seat256may include a first plate-like body2561. A lower edge of the first plate-like body2561towards the lower housing assembly21may be inserted the first inset grooves2151of the two first support parts215, and the first plate-like body2561may abut against the first reinforcement part216. The first reinforcement part216can increase the structural strength of the lower housing assembly21itself, and the strength of the cooperation between the shaft mechanism25and the lower housing assembly21can be increased through the cooperation between the first fixing seat256and the first reinforcement part216, so that the shaft mechanism25can be easily assembled with the lower housing assembly21. In some embodiments, the lower housing assembly21may include the lower housing body213and the lower housing liner214. The first support part215, the first reinforcement part216, and the first fixing seat256may be disposed between the lower housing body213and the lower housing liner214.

In some embodiments, the first fixing seat256may further include two first extension parts2562. The two first extension parts2562may extend from the first plate-like body2561in a direction toward the first reinforcement part216. The first reinforcement part216may be disposed between the two first extension parts2562. The first extension parts2562may protrude from an upper edge of the first plate-like body2561and disposed with first shaft holes for the shaft253to pass through. The first position limiting member271may be disposed at an end of the first extension part2562away from the first plate-like body2561. With such arrangement, the stability of the cooperation between the first fixing seat256and the first reinforcement part216can be increased, and the structural strength of the first position limiting member271and the first fixing seat256can be increased to improve the stability of the charging case20in the open state.

In some embodiments, the connection and fit of the upper housing assembly24, the position limiting mechanism, and the shaft mechanism25may be found in the following exemplary descriptions. The upper housing assembly24may include two second support parts243spaced apart along an axial direction of the shaft253. The two second support parts243may be disposed with a second inset groove2431. The second fixing seat257may include a second plate-like body2571and two second extension parts2572. An upper edge of the second plate-like body2571toward the upper housing assembly24may be inserted into the second inset groove2431of the two second support parts243. The second extension parts2572may be connected to the second plate-like body2571and extend toward the slot247. The second extension parts2572may be disposed with second shaft holes for the shaft253to pass through. The first position limiting member271may be disposed on the second extension parts2572. With such arrangement, the strength of the cooperation between the shaft mechanism25and the upper housing assembly24can be increased, and the shaft mechanism25can be easily assembled with the upper housing assembly24.

In some embodiments, the upper housing assembly24may include second reinforcement parts246disposed at two ends of the slot247. Each of the second extension parts2572may include a first sub-extension part2572adisposed between the two second reinforcement parts246and a second sub-extension part2572bconnected to the first sub-extension part2572aand extending along an axial direction of the shaft253. The second sub-extension part2572bmay be further connected to the second reinforcement part246. For example, the second sub-extension part2572bmay cooperate with the second reinforcement part246through a fastening member, such as a screw, a rivet, etc., so as to increase the strength and stability of the cooperation between the first fixing seat256and the upper housing assembly24.

In some embodiments, in combination withFIG.22, the charging case20may include a magnetic guide member261disposed within the lower housing assembly21, and a permanent magnet262disposed within the upper housing assembly24. For example, the magnetic guide member261may be fixed to an inner side of the lower housing liner214away from the upper housing assembly24, and the permanent magnet262may be fixed to an inner side of the upper housing liner242away from the lower housing assembly21, which reduces a spacing between the magnetic guide member261and the permanent magnet262in the charging case20after the charging case20is closed. The main control circuit board221may be disposed with the Hall sensor223. That is, the Hall sensor223may be directly fixed to the main control circuit board221, and the Hall sensor223may be disposed adjacent to the magnetic guide member261. In this way, during a process of switching between the open state and the closed state of the charging case20, the permanent magnet262may magnetize the magnetic guide member261to different degrees, and the Hall sensor223may sense a magnetic field of the magnetic guide member261to detect the open state or the closed state. In other words, in the closed state, the magnetic guide member261can cause the magnetic field generated by the permanent magnet262to converge more towards the Hall sensor223, thereby increasing the reliability of the detection by the Hall sensor223and reducing a dimension of the permanent magnet262.

Compared to a related technique that the Hall sensor223is fixed to the inner side of the lower housing liner214and is connected to the main control circuit board221through wires, the Hall sensor223can be directly fixed to the main control circuit board221in the present disclosure, thereby simplifying the alignment of the charging case20.

In some embodiments, in combination withFIGS.22and23, an orthographic projection of each profiling groove211and an orthographic projection of the magnetic guide member261on the main control circuit board221may be staggered to allow the magnetic guide member261to be as close as possible to the permanent magnet262after the charging case20is closed. For example, viewed directly above the charging case20, the magnetic guide member261may be located in any one of a first position (e.g., as shown by a dashed box P1inFIG.23), a second position (e.g., as shown by a dashed box P2inFIG.23), or a third position (e.g., as shown by a dashed box P3inFIG.23) at a periphery of the two profiling grooves211.

In some embodiments, in combination withFIG.23, viewed directly above the charging case20, the two profiling grooves211may be mirror symmetrical about a symmetry axis (e.g., as shown by a dotted line SA inFIG.23) to allow the two earphones10to be neatly placed and accommodated within the charging case20. The magnetic guide member261may be disposed on the symmetry axis SA and away from the shaft mechanism25. In this way, the amount of difference in the magnetic field of the magnetic guide member261in the open state and the closed state that is sensed by the Hall sensor223, respectively, can be increased, so as to increase the reliability of the detection of the Hall sensor223. It should be noted that the symmetry axis SA may be parallel to the line section OP1OP2, and the symmetry axis SA may also coincide with the line section OP1OP2.

In some embodiments, in combination withFIG.22, orthographic projections of the magnetic guide member261and the Hall sensor223on the main control circuit board221may be at least partially overlapped, which reduces a magnetic gap between the magnetic guide member261and the Hall sensor223, thereby allowing more of the magnetic field generated by the permanent magnet262to converge toward the Hall sensor223, especially in the closed state. The Hall sensor223may be disposed on a side of the main control circuit board221toward the magnetic guide member261to reduce the magnetic gap between the magnetic guide member261and the Hall sensor223. The Hall sensor223and the magnetic guide member261may be spaced apart in a normal direction of the main control circuit board221to reduce the risk of collision between the magnetic guide member261and the Hall sensor223, especially under extreme working conditions such as when the charging case20is dropped, etc.

In some embodiments, in combination withFIG.33,FIG.33is a schematic diagram illustrating a sectional structure of the charging case20when the charging case20is closed according to some embodiments of the present disclosure. The charging case20may include the lower housing assembly21, the upper housing assembly24, the main control circuit board221and the magnetic suction structure disposed within the lower housing assembly21, and an upper housing magnet disposed within the upper housing assembly24. The upper housing magnet may be the permanent magnet262. The Hall sensor223may be disposed in the lower housing assembly21, and the Hall sensor223may be electrically connected to the main control circuit board221. A magnetic structure may be used to magnetically maintain the placement of the earphones10within the charging case20. On this basis, during a process of closing the upper housing assembly24, the Hall sensor223can further detect the closing of the upper housing assembly24by detecting the proximity of the upper housing magnet. A type of the Hall sensor223may include an S-pole-triggered unipolar Hall switch or an N-pole-triggered unipolar Hall switch, which is not limited herein. The Hall sensor223being the S-pole-triggered unipolar Hall switch may be taken as an example in the latter present disclosure for illustration. When the Hall sensor223is the N-pole-triggered unipolar Hall switch, the principle is the same, which will not be repeated. It should be understood that those skilled in the art can adjust relevant magnetic pole characteristics when the Hall sensor223is the N-pole-trigger unipolar Hall switch according to the relevant principles later described when the Hall sensor223is the S-pole-triggered unipolar Hall switch, thereby achieving the same or similar technical effectiveness. Therefore, the technical solution when the Hall sensor223is the N-pole-triggered unipolar Hall switch is also included in the scope of the present disclosure.

It should be noted that the Hall sensor223has two output states, which can output a high level and a low level, respectively. The Hall sensor223may have an inductive surface. A component of the magnetic field at the Hall sensor223along a direction that is perpendicular to the inductive surface of the Hall sensor223and is in a positive direction toward the inductive surface may act on carriers of the Hall sensor223, which causes the carriers to deviate, thereby changing the output state of the Hall sensor223. The specific principle at least refers to the prior art, which will not be repeated. Taking the Hall sensor223being the N-pole-triggered unipolar Hall switch as an example, during a process that an S-pole of the magnet is gradually approached to the Hall sensor223, the component of the magnetic field at the Hall sensor223generated by the magnet in a direction perpendicular to a positive direction of the inductive surface of the Hall sensor223may be gradually increased. When the component exceeds a certain threshold value (e.g., when a strength of the magnetic field is 2 millitesla (mT) or 3 mT), the Hall sensor223may be transformed from the high level to the low level.

In related techniques, the charging case20may also include an auxiliary magnet that cooperates with the earphone10to form a magnetic suction structure or plays an auxiliary role in the closing of the charging case20. In addition to the magnetic field of the upper housing magnet when the upper housing magnet is close to act on the Hall sensor, magnetic fields of components (e.g., the magnetic suction structure, the auxiliary magnet, etc.) within the charging case20may also have some effect on the Hall sensor. For example, the magnetic suction structure disposed within the lower housing assembly21may affect the Hall sensor. However, since a size of the magnetic suction structure is relatively small, the effect on the Hall sensor223can be negligible. In other words, a strength of the magnetic field of the magnetic suction structure acting on the Hall sensor223may not reach a threshold value for changing the output state of the Hall sensor223(i.e., the presence or absence of the magnetic suction structure does not change the output state of the Hall sensor223). In this way, the reason for the change in the state of the Hall sensor223is mainly due to the proximity of the upper housing magnet. Taking the Hall sensor223being the N-pole-triggered unipolar Hall switch as an example, when a volume of the magnetic suction structure is relatively small, the output state of the Hall sensor223does not change due to the magnetic field of the magnetic suction structure. When the upper housing assembly24is closed, the S pole of the upper housing magnet may be close to the Hall sensor223, and the Hall sensor223may be subjected to the magnetic field of the upper housing magnet. When the strength of the magnetic field reaches the threshold value for changing the output state, the output state may be changed. For example, the change of the output state of the Hall sensor223may be a change from the high level to the low level, and a circuit in the main control circuit board may be designed to determine that the charging case20is closed when the circuit detects the output of the Hall sensor223is the low level.

In some embodiments, due to a weak suction force on the earphone10generated by the magnetic suction structure with a relatively small volume, which is not conducive to the placement of the earphones10inside the charging case20, the suction force on the earphone10needs to be enhanced by increasing the volume of the magnetic suction structure, so as to improve the stability of the placement of the earphones10. For example, the first magnetic suction structure may adopt a magnet with a diameter of 8-15 mm and a thickness of 2-4 mm. However, the increase in the size of the magnetic suction structure may result in that the effect on the Hall sensor223from the magnetic field generated by the magnetic suction structure can not be ignored. That is, the strength of the magnetic field of the magnetic suction structure at the Hall sensor223may have reached the threshold value where the Hall sensor223changes the output state, resulting in that the magnetic field of the magnetic suction structure can change the output state of the Hall sensor223when the charging case20is not closed. For example, in the case where the upper housing magnet described above is disposed with the S-pole facing downward, if the component of the magnetic field of the magnetic suction structure in the direction that is perpendicular to the inductive surface of the Hall sensor223is oriented to the positive direction of the inductive surface and exceeds the threshold value for changing the output state of the Hall sensor, when the upper housing magnet approaches the Hall sensor223, since a direction of the component corresponding to the upper housing magnet at the Hall sensor223in the direction that is perpendicular to the inductive surface is the same as a direction of the component corresponding to the magnetic suction structure at the Hall sensor223in the direction that is perpendicular to the inductive surface, the magnetic field at the Hall sensor223may be enhanced, but the output state of the Hall sensor223may fail to be changed, resulting in a detection failure of the opening and closing the charging case20. In order to improve the above technical problem, the present disclosure may provide the following embodiments.

In some embodiments, a cooperation relationship between the magnetic suction structure, the upper housing magnet, and the Hall sensor223may be disposed such that when the upper housing assembly24is in the open state with respect to the lower housing assembly21, the Hall sensor223is in a first state under an action of the magnetic field of the magnetic suction structure, and when the upper housing assembly24is in the closed state with respect to the lower housing assembly21, the upper housing magnet counteracts the action of the magnetic field of the magnetic suction structure on the Hall sensor223, and the Hall sensor223is switched into a second state different from the first state. The first state refers to one of states in which the Hall sensor223outputs the high level or the Hall sensor223outputs the low level, and the second state refers to another state different from the first state in which the Hall sensor223outputs the high level or the Hall sensor223outputs the low level. In other words, by disposing the cooperation relationship between the magnetic suction structure, the upper housing magnet, and the Hall sensor223, the Hall sensor223can change the output state under the action of the upper housing magnet when the charging case20is closed.

The above embodiments are described for illustration by taking the S-pole-triggered unipolar Hall switch as an example. When the magnetic field of the magnetic suction structure at the Hall sensor223reaches the threshold value for the Hall sensor223to change the output state (compared to the state of the Hall sensor223completely unperturbed by the magnetic field, i.e., the presence or absence of the magnetic suction structure affects the output state of the Hall sensor223), e.g., the magnetic field is larger than 3 mT, the Hall sensor223may be in the first state and output the low level. In this case, in order to ensure the validity of the closure detection, when the upper housing assembly24is closed, the upper housing magnet is close to the Hall sensor223, and it is necessary to change the magnetic field at the Hall sensor223to cause the Hall sensor223to be in the second state (i.e., to output the high level). In this way, by disposing the circuit in the main control circuit board to determine that the charging case20is closed when the circuit detects that the Hall sensor223outputs the high level, the closure detection can be achieved. For instance, when the upper housing assembly24is in the closed state with respect to the lower housing assembly21, magnetic poles of the magnetic suction structure toward the upper housing assembly24may be opposite polarity to magnetic poles of the upper housing magnet toward the lower housing assembly21. For example, with the S pole of the magnetic suction structure facing the upper housing assembly24, and an included angle between the inductive surface of the Hall sensor223and a line connecting the magnetic suction structure and the Hall sensor223being less than 45 degrees, a component of the magnetic field of the magnetic suction structure perpendicular to the inductive surface of the Hall sensor223facing the positive direction of the inductive surface can trigger the Hall sensor223to the first state (i.e., the low level). The N-pole of the upper housing magnet may be disposed toward the lower housing assembly21when the charging case20is closed. With such arrangement, when the charging case20is closed, the component of the upper housing magnet perpendicular to the inductive surface at the Hall sensor223may be in a negative direction of the inductive surface. In other words, when the charging case20is closed, magnetic fields of the upper housing magnet and the magnetic suction structure at the Hall sensor223may cancel with each other, so that the component of a composite magnetic field perpendicular to the inductive surface of the magnetic suction structure and the upper housing magnet at the Hall sensor223is less than the triggering threshold value of the Hall sensor223(even if the component of the composite magnetic field perpendicular to the inductive surface is facing the negative direction of the inductive surface), thereby triggering the Hall sensor223to the second state (i.e., a state of the high level). The main control circuit board221can detect whether the charging case20is closed or not by detecting the output state of the Hall sensor223. Through the above manner, the closure detection can be performed on the charging case20even when the Hall sensor223is interfered by the magnetic suction structure.

In some embodiments, a magnetic field distribution of the upper housing magnet at the Hall sensor223may be adjusted to cooperate with a magnetic field distribution of the magnetic suction structure at the Hall sensor223, so that a direction of a total magnetic field acting on the Hall sensor223may be changed when the upper housing magnet is close to the Hall sensor223. Differences in the magnetic field distribution of the upper housing magnet at the Hall sensor223may be represented by differences in physical parameters of the upper housing magnet.

In some embodiments, a diameter of the upper housing magnet may be within a range of 4 to 6 mm, and a thickness of the upper housing magnet may be within a range of 1 to 8 mm. For instance, referring toFIG.34,FIG.34is a schematic diagram illustrating an exemplary simulation result of a magnetic field at the Hall sensor223for upper cover magnets with different thicknesses according to some embodiments of the present disclosure.FIG.34(a)is a schematic diagram illustrating exemplary simulation results of the magnetic field at the Hall sensor223when the charging case20in the open state and the closed state, respectively, and the earphones10are not accommodated.FIG.34(b)is a schematic diagram illustrating exemplary simulation results of the magnetic field at the Hall sensor223when the charging case20is in the open state and the closed state, respectively, and the earphones10are accommodated. The positive and negative of values inFIG.34represent positive and negative directions of the total magnetic field near the Hall sensor with respective to an inductive surface, respectively. For example, in the case where the magnetic suction structure uses a permanent magnet with a diameter of 10 mm and a thickness of 2.5 mm, and no earphone10is placed in the charging case20, the magnetic suction structure generates a magnetic field at the Hall sensor223in a direction toward the positive direction of the inductive surface of the Hall sensor223and a magnetic field strength of 6.5 mT. At this time, the Hall sensor223is in a low level state under the influence of the magnetic field of the magnetic suction structure. After the upper housing assembly24is closed, the upper housing magnet cancels the magnetic field generated by the magnetic attraction structure at the Hall sensor223and flips the magnetic field, so that the direction of the magnetic field at the Hall sensor223faces the negative direction of the inductive surface and the magnetic field strength becomes 5.1 mT. At this time, the Hall sensor223is in a high level state. When dimensions of the upper cover magnet are different, effects on the Hall sensor223are also different. For example, when the diameter of the upper housing magnet is 5 mm, with the increase in the thickness of the upper housing magnet, the magnetic field strength of the Hall sensor223after flip is gradually increased.

In some embodiments, the earphone10may be further disposed with the first magnetic suction member that cooperates with the magnetic suction structure. The first magnetic suction member may be disposed such that when the earphone10is accommodated within the charging case20and the upper housing assembly24is in an open state, the Hall sensor223is in the first state. The first magnetic suction member may be disposed such that when the earphone10is accommodated within the charging case20and the upper housing assembly24is in the closed state, the Hall sensor223is in the second state. When the earphone10is placed in the charging case20, the first magnetic suction member disposed in the earphone10may also have an effect on the magnetic field at the Hall sensor223that is distinct from that of the magnetic suction structure. The component at the Hall sensor223perpendicular to the inductive surface may be oriented in the positive direction of the inductive surface or in the negative direction of the inductive surface. However, the first magnetic suction member may be disposed to have an effect only on a magnitude of the magnetic field perpendicular to the inductive surface at the Hall sensor223, and not on a direction of the total magnetic field there. In other words, the placement of the earphone10may have no effect on the output state of the Hall sensor223. For example,FIG.34(b)is a schematic diagram illustrating exemplary simulation results in the case where the earphone10is placed inside the charging case20. The schematic diagram was made in the case that the magnetic suction structure uses a permanent magnet with a diameter of 10 mm and a thickness of 2.5 mm, and the upper housing magnet uses a permanent magnet with a diameter of 5 mm and a thickness of 2 mm. When the earphone10is placed inside the charging case20, the magnetic field at the Hall sensor223may be a magnetic field with the magnetic field direction facing the positive direction of the inductive surface and with a magnetic field strength of 7.1 mT. At this time, the Hall sensor223outputs the low level. After the upper housing assembly24is closed, the upper housing magnet flips the magnetic field at the Hall sensor223to a magnetic field with the magnetic field direction facing the negative direction of the inductive surface and with a magnetic field strength of 4.5 mT. At this time, the Hall sensor223outputs the high level.

In some embodiments, the earphone10may further include the second magnetic suction member that is independent of the first magnetic suction member. The magnetic suction structure may include the second magnetic suction structure that magnetically cooperates with the second magnetic suction member. The first magnetic suction structure231and the first magnetic suction member within the earphone10may form the first magnetic suction matching pair, and the second magnetic suction structure232and the second magnetic suction member within the earphone10may form the second magnetic suction matching pair. The first magnetic suction matching pair and the second magnetic suction matching pair may cause the electrode terminals222and the electrode terminals151in one-to-one contact. In this way, since the electrode terminal222and the electrode terminal151are located between the first magnetic suction matching pair and the second magnetic suction matching pair after being paired up, the contact between the earphone10and the charging case20can be improved. Volumes of the second magnetic suction member and the second magnetic suction structure may be smaller than volumes of the first magnetic suction member and the first magnetic suction structure231, and a distance between the Hall sensor223and the first magnetic suction structure231may be smaller than a distance between the Hall sensor223and the second magnetic suction structure. With such arrangement, the influence of the second magnetic suction structure on the magnetic field at the Hall sensor223can be reduced, thereby reducing the interference on the output state of the Hall sensor223.

In some embodiments, the magnetic guide member261may also be disposed within the lower housing assembly21. The magnetic guide member261can change the magnetic field distribution of the upper housing magnet so as to be able to converge the magnetic field of the upper housing magnet to increase the effect of the upper housing magnet on the Hall sensor223. When the upper housing assembly24is closed, as the upper housing magnet gradually approaches to the magnetic guide member261, the magnetic field of the upper housing magnet may magnetize the magnetic guide member261, which can affect the magnetic field distribution at the Hall sensor223. Furthermore, the magnetic field generated by the magnetic guide member261may counteract the magnetic field effect of the magnetic suction structure on the Hall sensor223, which causes the Hall sensor223to switch to a second state different from the first state. During a process of switching the charging case20between the open state and the closed state, the upper housing magnet may magnetize the magnetic guide member261to different degrees, and the Hall sensor223may sense the magnetic field of the magnetic guide member261to detect the open state or the closed state. In other words, in the closed state, the magnetic guide member261may cause the magnetic field generated by the upper housing magnet to converge more towards the Hall sensor223, thereby increasing the reliability of the detection by the Hall sensor223and reducing the dimension of the upper housing magnet. Through the above manner, compared to the related technique that the Hall sensor223is fixed to the inner side of the lower housing liner214and is connected to the main control circuit board221through wires, the Hall sensor223can be directly fixed to the main control circuit board221in the present disclosure, thereby simplifying the alignment of the charging case20.

In some embodiments, by disposing a distance between the Hall sensor223and the magnetic guide member261to be less than a distance between the Hall sensor223and the magnetic suction structure, the magnetic field converged by the magnetic guide member261can be closer to the Hall sensor223. At the same time, the magnetic field of the magnetic suction structure that is converged by the magnetic guide member261is limited, so as to strengthen the effect of the magnetic field converged by the magnetic guide member261on the Hall sensor223, and reduce the magnetic field influence of the magnetic suction structure, which is conducive to the flip of the magnetic field at the Hall sensor223.

In some embodiments, in the thickness direction of the charging case20, when the upper housing assembly24is in the closed state, orthographic projections of the upper housing magnet and the magnetic guide member261may be disposed to at least partially overlap in the thickness direction. In this way, a distance between the upper housing magnet and the magnetic guide member261in the first reference direction or the second reference direction can be adjusted. By shortening the distance between the upper housing magnet and the magnetic guide member261in the first reference direction or the second reference direction, the magnetic gap between the upper housing magnet and the magnetic guide member261can be reduced, so as to cause the magnetic field generated by the permanent magnet262to converge more towards the Hall sensor223, especially in the closed state, so that the upper housing magnet with a relatively small volume also can generate a sufficiently strong magnetic field at the Hall sensor223. In some embodiments, when the upper housing assembly24is in the closed state, centroids of the orthographic projections of the upper housing magnet and the magnetic guide member261in the thickness direction may be disposed to coincide.

In some embodiments, when the upper housing assembly24is in the closed state, by disposing a relative position between the magnetic guide member261and the upper housing magnet mounted within the charging case20, the distance between the upper housing magnet and the magnetic guide member261in the thickness direction can be adjusted. By shortening the distance between the upper housing magnet and the magnetic guide member261in the thickness direction, the magnetic gap between the upper housing magnet and the magnetic guide member261can be decreased, so as to enhance the ability of the magnetic guide member261to converge the magnetic field of the upper housing magnet, which causes the magnetic field generated by the permanent magnet262to converge more towards the Hall sensor223. With such arrangement, when the charging case20is closed, the upper housing magnet may have a relatively small volume under the premise of ensuring that the upper housing magnet is able to change the output state of the Hall sensor223, thereby reducing the volume of the charging case20. In some embodiments, when the upper housing assembly24is in the closed state, a distance between surfaces of the magnetic guide member261and the upper housing magnet that are close to each other may be disposed to be less than or equal to 5 mm. With such arrangement, a certain gap can be between the upper housing magnet and the magnetic guide member, so that a side wall of the upper housing assembly and a side wall of the lower housing assembly (i.e., the upper housing liner242and the lower housing liner214) can space and cover the upper housing magnet and the magnetic guide member261, so that the upper housing magnet and the magnetic guide member261can not be exposed between the upper housing assembly24and the lower housing assembly21, and no additional holes need to be opened on the upper housing liner242and the lower housing liner214, which increases the structural strength of the charging case20and improves the appearance of the charging case20. In some other embodiments, when the upper housing assembly24is in the closed state, an end of the magnetic guide member261away from the Hall sensor223may be disposed to directly abut against a bottom surface of the upper housing magnet, so as to increase the magnetization of the upper housing magnet to the magnetic guide member261. Therefore, the magnetic field of the upper housing magnet may be converged more towards the Hall sensor223.

In the thickness direction of the charging case20, the lower housing assembly21may be disposed with the profiling grooves211for accommodating the earphones10, respectively. The orthographic projections of the profiling grooves211on the main control circuit board221may be staggered from the orthographic projections of the Hall sensors223and the upper housing magnet on the main control circuit board221. With such arrangement, the Hall sensor223can be disposed outside the profiling groove211, which enables the Hall sensor223to be closer to the upper housing magnet, and is conducive for the upper housing magnet to change the output state of the Hall sensor223.

In some embodiments, the auxiliary magnet may also be disposed within the lower housing assembly21. For example, the auxiliary magnet may be a magnet that assists the magnetic cooperation between the upper housing assembly24and the lower housing assembly21. Alternatively, the auxiliary magnet may be a magnet that assists the cooperation between the earphone10and the profiling groove211. The auxiliary magnet may be disposed while the Hall sensor223is in the first state when the upper housing assembly24is in the open state, and the Hall sensor223is in the second state when the upper housing assembly24is in the closed state. In other words, the auxiliary magnet may not have an effect on the output state of the Hall sensor223that is different from the effect of the magnetic suction structure on the output state of the Hall sensor223.

The above descriptions are only a portion of embodiments of the present disclosure, and are not intended to limit the scope of the present disclosure. Any equivalent device or equivalent process transformed using the contents of the specification of the present disclosure and the accompanying drawings, or directly or indirectly applied in other related technical fields, are all included in the scope of the present disclosure.