Patent ID: 12212920

REFERENCE NUMERALS

Reference numeralsName10housing11rear acoustic cavity111bottom cavity wall112side cavity wall12upper housing121leakage hole122filling hole13lower housing20loudspeaker unit30barrier rib body31limiting surface311plane section312inclined section40sound-absorbing particles

The realization of the object, functional features and advantages of the present disclosure will be further described in conjunction with the embodiments with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, but not all embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative work fall within the protection scope of the present disclosure.

It should be noted that if there are directional indications (such as up, down, left, right, front, rear, etc.) involved in the embodiments of the present disclosure, the directional indications are only used to explain the relative position relationship and motion between components in a specific attitude (as shown in the accompanying drawings), and if the specific attitude changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of the present disclosure, these descriptions are only used for descriptive purposes, and should not be construed as indicating or implying its relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with “first” and “second” may explicitly or implicitly include at least one of such feature. In addition, the meaning of “and/or” in the full text is to include three parallel schemes. Taking “A and/or B” as an example, it includes a scheme A, a scheme B, or a scheme A and B. In addition, the technical solutions between various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or impossible to be realized, it should be considered that the combination of such technical solutions does not exist and is not within the protection scope of the present disclosure.

The present disclosure provides a loudspeaker module, which can be used for electronic apparatus such as earphones and mobile phones that can produce sound.

In an embodiment of the present disclosure, referring toFIGS.1to4, the loudspeaker module includes a housing10, a loudspeaker unit20and a barrier rib body30; the loudspeaker unit20is disposed in an inner cavity of the housing10and divides the inner cavity of the housing10into a front acoustic cavity (not shown in the figures) and a rear acoustic cavity11, the rear acoustic cavity11is filled with sound-absorbing particles40, and a cavity wall of the rear acoustic cavity11is provided with a leakage hole21. The barrier rib body30is disposed in the rear acoustic cavity11, at least a part of the barrier rib body30faces the leakage hole121, and the distance between the leakage hole121and the part of the barrier rib body30facing the leakage hole121is less than the size of the sound-absorbing particles40.

In this embodiment, the housing10includes an upper housing12and a lower housing13, wherein the upper housing12and the lower housing13enclose to form the inner cavity of the housing10, and the loudspeaker unit20and the lower housing13enclose to form the front acoustic cavity, and the loudspeaker unit20, the lower housing13and the upper housing12enclose together to form the rear acoustic cavity11. The leakage hole121is provided on the housing10and penetrates the cavity wall of the rear acoustic cavity11. The barrier rib body30and the leakage hole121may be arranged on the upper housing12or the lower housing13together, or the barrier rib body30and the leakage hole121may be respectively arranged on the upper housing12and the lower housing13, and the barrier rib body30can be matched with the leakage hole121after assembling the upper housing12and the lower housing13. Of course, in other embodiments, the housing10may also be provided in an integral housing form.

The part of the barrier rib body30facing the leakage hole121is spaced apart from the cavity wall at which the leakage hole121is located, and an orthographic projection of projecting the part of the barrier rib body30facing the leakage hole121on the cavity wall at which the leakage hole121is located, is in the leakage hole121, and a distance between the part of the barrier rib body30facing the leakage hole121and the cavity wall where the leakage hole121is located is smaller than the size of the sound-absorbing particles40. The sound-absorbing particles40may have various shapes, for example, the shape of the sound-absorbing particles40may be spherical or spheroidal, and the size of the sound-absorbing particles40is the diameter of the spherical particles or the diameter of the spheroidal particles. When the sound-absorbing particles40have block-like shape, the size of the sound-absorbing particles40is the outer size of the block-shaped particles, or the like. In addition, the diameter of the leakage hole121may be smaller than the size of the sound-absorbing particles40, or the diameter of the leakage hole121may be greater than or equal to the size of the sound-absorbing particles40. When the distance between the part of the barrier rib body30facing the leakage hole121and the leakage hole121is smaller than the size of the sound-absorbing particles40, the sound-absorbing particles40can be blocked from moving between the barrier rib body30and the cavity wall of the rear acoustic cavity11towards the leakage hole121.

In this embodiment, the loudspeaker unit20includes a vibration system (not shown in the figures) and a magnetic circuit system (not shown in the figures), and the vibration system includes a diaphragm and a voice coil fixed on one side of the diaphragm, and the diaphragm includes a central portion, a ring portion arranged around the central portion, and a fixing portion arranged around the ring portion, the diaphragm may further include a composite layer combined at the central portion. The magnetic circuit system includes a magnetic conductive yoke, an inner magnetic circuit portion and an outer magnetic circuit portion are arranged on the magnetic conductive yoke, and a magnetic gap for accommodating the voice coil is formed between the inner magnetic circuit portion and the outer magnetic circuit portion. In one case, the inner magnetic circuit portion includes a central magnet arranged at the center of the magnetic conductive yoke and a central magnetic conductive plate arranged on the central magnet, and the outer magnetic circuit portion includes a side magnet arranged at the edge of the magnetic conductive yoke and a side magnetic conductive plate arranged on the side magnet. The loudspeaker unit20may further include an auxiliary system, the auxiliary system includes a housing for accommodating and fixing the vibration system and the magnetic circuit system. In addition, the auxiliary system may further include a front cover, the front cover is combined on the housing, and the front cover and the housing enclose to form a protective frame of the loudspeaker unit20. Of course, in some cases, the loudspeaker unit20may also not include an auxiliary system.

According to the present disclosure, the barrier rib body30is provided in the rear acoustic cavity11, and at least a part of the barrier rib body30faces the leakage hole121, so as to block the sound-absorbing particles40from flowing to the leakage hole121in a direction directly opposite to the leakage hole121, and when the distance between the leakage hole121and the part of the barrier rib body30facing the leakage hole121is less than the size of the sound-absorbing particles40, the sound-absorbing particles40can be blocked from flowing to the leakage hole121from between the barrier rib body30and the cavity wall of the rear acoustic cavity11. That is, by providing the barrier rib body30, the sound-absorbing particles40can be blocked from flowing to the leakage hole121, and furthermore the sound-absorbing particles40can be spaced from the leakage hole121, so as to effectively reduce the occurrence of the situation where the sound-absorbing particles40block the leakage hole121. In addition, it will be understood that when the sound-absorbing particles40block the leakage hole121, the gas-exhaust cross section of the leakage hole121is greatly reduced, resulting in an instantaneous increase of the flow rate of gas flowing to a gap between the sound-absorbing particles40and the leakage hole121in proximity of the leakage hole121, which will further drive a large number of sound-absorbing particles40in proximity of the leakage hole121to move violently, and the sound-absorbing particles40collide with each other and produce large noise. When the sound-absorbing particles40are blocked by the barrier rib body30so that the sound-absorbing particles40are spaced from the leakage hole121, the gap between the sound-absorbing particles40and the leakage hole121can be ensured to be large, so as to effectively reduce the occurrence of the above-mentioned defects.

In an embodiment, the rear acoustic cavity11includes a bottom cavity wall111and a side cavity wall112connected to the bottom cavity wall111, the leakage hole121is provided on the side cavity wall112, and the barrier rib body30is provided to be protruded on the bottom cavity wall111. Specifically, the bottom cavity wall111and the side cavity wall112are formed on the upper housing12, the bottom cavity wall111is disposed opposite to the lower housing13, and the side cavity wall112extends along a periphery of the bottom cavity wall111to form into an annular shape, the leakage hole121is spaced apart from the bottom cavity wall111, the barrier rib body30is spaced apart from the side cavity wall112, the projection of projecting the barrier rib body30on the side cavity wall112is at least partially located in the leakage hole121, and the distance between the barrier rib body30and the side cavity wall112is smaller than the size of the sound-absorbing particles40so as to enable the sound-absorbing particles40to be spaced from the leakage hole121. Since the barrier rib body30as a whole is spaced apart from the side cavity wall112, the situation that the barrier rib body30extends into the leakage hole121to cause the gas-exhaust area of the leakage hole121to decrease can be avoided, and the gas can be ensured to flow to the leakage hole121along the periphery of the leakage hole121, and the gas circulation is relatively uniform, which is beneficial to reduce the noise caused by the gas flow. Of course, in other embodiments, the barrier rib body30may also include a connecting portion and a shielding portion, and the shielding portion is spaced apart from the side cavity wall112and at least partially facing the leakage hole121, and a gap between the shielding portion and the side cavity wall112is smaller than the size of the sound-absorbing particles40, one end of the connecting portion is connected to the side cavity wall112and the other end of the connecting portion is connected to the shielding portion.

Referring toFIGS.4to6, in an embodiment, a height of the barrier rib body30is greater than a distance between a hole edge of the leakage hole121away from the bottom cavity wall111and the bottom cavity wall111. Specifically, the height of the barrier rib body30is the distance between an upper end thereof and the bottom cavity wall111, the leakage hole121has an upper hole edge away from the bottom cavity wall111, the height of the barrier rib body30is greater than the distance between the upper hole edge of the leakage hole121and the bottom cavity wall111, therefore, when the sound-absorbing particles40are located at the upper end of the barrier rib body30, the sound-absorbing particles40are far away from the leakage hole121, that is, the distance between the sound-absorbing particles40and the leakage hole121is increased, and thereby the blocking effect on the gas flowing to the leakage hole121due to the sound-absorbing particles40can be reduced, and the gas can flow to the leakage hole121relatively evenly along the periphery of the leakage hole121. Of course, in other embodiments, the height of the barrier rib body30may also be disposed to be less than or equal to the distance between the upper hole edge of the leakage hole121and the bottom cavity wall111.

Referring toFIGS.3and7, in an embodiment, the bather rib body30has a limiting surface31, the limiting surface31faces the cavity wall of the rear acoustic cavity11provided with the leakage hole121, the limiting surface31includes a plane section311, and a distance between the plane section311and the cavity wall of the rear acoustic cavity11is smaller than the size of the sound-absorbing particles40. Specifically, the limiting surface31faces the side cavitywall112and is spaced apart from the side cavity wall112, and the plane section311has an area less than or equal to that of the limiting surface31, the plane section311is adjacent to the leakage hole121, and the distance between the plane section311and the side cavity wall112is smaller than the size of the sound-absorbing particles40, that is, the barrier rib body30blocks the movement of the sound-absorbing particles40toward the leakage hole121by the plane section311. In addition, since the flow direction and the flow velocity of the gas flowing out between each of the sound-absorbing particles40are quite different when the gas flows out from the gaps between the plurality of sound-absorbing particles40, therefore, by providing the plane section311, the distance between the sound-absorbing particles40and the leakage hole121can be increased, and furthermore the gap between the plane section311and the side cavity wall112is larger than the gaps between the plurality of sound-absorbing particles40, and when the gas flows from the gaps between the plurality of sound-absorbing particles40to the gap between the plane section311and the side cavity wall112, the gas can be buffered between the plane section311and the side cavity wall112and can flow into the leakage hole121along the periphery of the leakage hole121at a relatively gentle flow rate, which is beneficial to reduce the Reynolds number of the gas flow and reduce noise.

In an embodiment, the limiting surface31further includes an inclined section312connected with the plane section311, the inclined section312is located at a side of the plane section311away from the leakage hole121, and a distance between the inclined section312and the cavity wall of the rear acoustic cavity11gradually increases in a direction away from the leakage hole121. Specifically, the distance between the inclined section312and the side cavity wall112is greater than the distance between the plane section311and the side cavity wall112, and the inclined section312and the side cavity wall112form into a bellmouth shape with a gradually increasing gap in a direction away from the plane section311, so as to facilitate to guide the gas to flow from between the limiting surfaces31to the leakage hole121. Furthermore, by providing the limiting surface31into the form of a plane section311and an inclined section312, the overall distance between the limiting surface31and the side cavity wall112is increased, that is, the size of the bump on the mold for molding the limiting surface31during injection molding can be increased, which is beneficial to improve the strength of the mold, and thereby being capable of reducing the possibility of deformation of the bump on the mold, ensuring the molding yield of the barrier rib body30, and furthermore being capable of improving the service life of the mold and reducing the production cost.

In an embodiment, the present disclosure is provided with two bather rib bodies30, the two bather rib bodies30are arranged to be spaced from each other, and the leakage hole121is located between the two barrier rib bodies30. Specifically, the two bather rib bodies30are both disposed on the bottom cavity wall111and are arranged to be spaced apart from the side cavity wall112, and the distance between each barrier rib body30and the side cavity wall112is smaller than the size of the sound-absorbing particles40, and at least one barrier rib body30is disposed to face the leakage hole121. Compared with the case in which one barrier rib body30is provided, more sound-absorbing particles40can be blocked by providing two barrier rib bodies30, moreover, the leakage hole121is arranged between the two barrier rib bodies30so that the gas can directly flow to the leakage hole121from the gap between the two barrier rib bodies30, which can reduce the blocking effect on the gas due to the barrier rib bodies30, and the gas circulation effect is good. Of course, in other embodiments, the barrier rib body30may be provided with one or more, for example, the number of barrier rib body30may also be three or four, and so on.

Referring toFIGS.4and7, in an embodiment, a distance between ends of the two barrier rib bodies30adjacent to the leakage hole121is smaller than the size of the sound-absorbing particles40. In this way, when the sound-absorbing particles40move in the direction directly opposite to the leakage hole121, the sound-absorbing particles40can be captured between the two barrier rib bodies30so that the sound-absorbing particles40between the two barrier rib bodies30are spaced from the hole edge of the leakage hole121. It can avoid the problem that the gas around the leakage hole121may be blocked from flowing toward the leakage hole121and resulting in poor gas flow uniformity when the sound-absorbing particles40come into contact with the hole edge of the leakage hole121.

In addition, in order to ensure the flow effect of the gas, in an embodiment, a distance between the two barrier rib bodies30is configured to gradually increase in the direction away from the leakage hole121. Specifically, the surfaces facing to each other of the two barrier rib bodies30are inclined towards opposite directions in the direction away from the leakage hole121, so that the gap between the two barrier rib bodies30forms into a bellmouth shape which increases towards the direction away from the leakage hole121, and thereby being capable of reducing the blocking effect on the gas due to the barrier rib bodies30, and being capable of better guiding the gas to flow from between the two barrier rib bodies30to the leakage hole121. Of course, the other embodiments may also configured to incline only the surface of one barrier rib body30facing the other barrier rib body30.

There are various fixing methods between the barrier rib body30and the housing10. For example, in an embodiment, the barrier rib body30is integrally formed with the housing10. Specifically, the barrier rib body30is integrally injection-molded with the housing10, that is, the barrier rib body30may be formed together at the time of forming the housing10, which reduces an additional step of mounting the barrier rib body30on the housing10, and thereby can improve production efficiency. Furthermore, the connection between the barrier rib body30and the housing10is more stable, and the service life is longer. Of course, in other embodiments, the barrier rib body30may also be adhered to the housing10, or the barrier rib body30may be fixed on the housing10by bolts.

Referring toFIG.1again, in an embodiment, the upper housing12is further provided with a filling hole122communicated with the rear acoustic cavity11and a cover plate that covers the filling hole122. Specifically, after assembling the upper housing12and the lower housing13, the sound-absorbing particles40can be filled into the rear acoustic cavity11through the filling hole122, to ensure the entire rear acoustic cavity11to be filled with the sound-absorbing particles40; in addition, the cover plate closes the filling hole122to avoid the leakage of sound-absorbing particles40. Among them, the cover plate is detachably connected with the upper housing12, so as to facilitate to open the cover plate to replace the sound-absorbing particles40. In this embodiment, both the leakage hole121and the filling hole122are arranged on the upper housing12to facilitate molding.

The present disclosure also provides an electronic apparatus, which includes an apparatus body and a loudspeaker module. The specific structure of the loudspeaker module refers to the above-mentioned embodiments. Since the electronic apparatus adopts all the technical solutions of the above-mentioned embodiments, the electronic apparatus at least has all the beneficial effects obtained by the technical solutions of the above embodiments, which will not be repeated here. Wherein, the loudspeaker module is disposed on the apparatus body, and the apparatus body can produce sound through the loudspeaker module. The electronic apparatus may be mobile phones, computers, tablets or smart loudspeakers, etc.

The above are only preferred embodiments of the present disclosure, and are not intended to limit the scope of the invention. In addition, the equivalent structure transformation made by using the contents of the description and drawings of the present disclosure, or the direct/indirect applications in other relevant technical fields, are included within the protection scope of the present disclosure.