Patent ID: 12218557

Reference signs are listed as follows:terminal device100; accommodating cavity C1;screen101; light-transmitting cover plate101a; display101b;middle frame102; bezel1021; middle plate1022; first surface1022a; second surface1022b; recess1022c; first avoiding hole1023;back cover103; primary circuit board104; secondary circuit board105; connection component106; battery107;vibration motor108;housing1; accommodating space1a;first wall plate11; first short side111; second short side112; first long side113; second long side114; first protruding portion115; first accommodating compartment115a; first top wall1151; first encircling wall1152; flanging portion1153; first side wall1154; second side wall1155; communication opening116; supporting portion117; first wall plate body11a; extension plate11b;second wall plate12; third protruding portion121; second top wall1211; second encircling wall1212; second accommodating compartment121a;side frame13; first side plate131; second side plate132; third side plate133; fourth side plate134; blocking plate135; avoiding opening135a;mass block2; mounting slot21; second protruding portion22;elastic assembly3;first elastic part31; first fixing portion311; second fixing portion312; first connection portion313;second elastic part32; third fixing portion321; fourth fixing portion322; second connection portion323;driving assembly4;magnet assembly41; first magnet411; second magnet412; magnetoconductive part413; magnetic gap K;coil42;damping structure5;electrical connection structure6; first segment61; second segment62; third segment63; positive terminal64; negative terminal65;adhesive109;limiting structure110; limiting portion110a; connection lug110b; second avoiding hole110c;limiting space C2; andbuffer part200.

DESCRIPTION OF EMBODIMENTS

In embodiments of this application, the terms “first”, “second”, “third”, and “fourth” are merely intended for a purpose of description, and shall not be understood as an indication or implication of relative importance or an implicit indication of a quantity of indicated technical features. Therefore, a feature preceded by “first”, “second”, “third”, or “fourth” may explicitly or implicitly include one or more features.

In the embodiments of this application, the terms “comprise” and “include” or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, a method, an article, or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or elements inherent to the process, method, article, or apparatus. In absence of more constraints, an element preceded by “includes a . . . ” does not preclude the existence of another identical element in a process, a method, an article, or an apparatus that includes the element.

In the embodiments of this application, “and/or” indicates merely an association relationship for describing associated objects and represents the presence of three relationships. For example, A and/or B may represent the presence of three cases: only A, both A and B, and only B. In addition, the character “/” in this specification generally represents an “or” relationship between associated objects.

This application provides a terminal device. The terminal device is provided with a vibration motor inside, capable of vibrating to implement functions such as notification of incoming calls, messages, SMS messages, weather, or news, and haptic feedback for trigger or accidental trigger.

To overcome a technical bottleneck that the vibration motor restrains further thinning of the terminal device, in this application, a housing of the vibration motor is provided with partial protrusions (for example, a first protruding portion and a third protruding portion in the following), so that some structures (structures such as a coil, a mass block, a magnet assembly, and a damping structure) inside the vibration motor are accommodated in space in the partial protrusions; in addition, components such as a middle frame and a limiting structure inside the terminal device are provided with corresponding avoiding holes (for example, a first avoiding hole and a second avoiding hole in the following), so that the partial protrusions are accommodated in the avoiding holes, thereby reducing space occupied by the partial protrusions.

In the improvement solution of this application, because some structures such as the coil, the mass block, the magnet assembly, and the damping structure of the vibration motor can be accommodated in the partial protrusions and the partial protrusions can be accommodated in the avoiding holes in the components such as the middle frame and the limiting structure, volumes of the structures such as the mass block, the coil, and the magnet assembly inside the vibration motor can be increased without increasing overall space occupied by the vibration motor, so that overall performance of the vibration motor can be improved without increasing thickness of the terminal device. Moreover, while the volumes of the structures inside the vibration motor are kept unchanged, that is, while original performance of the vibration motor is maintained, a mounting height of the vibration motor can be reduced, so that the space occupied by the vibration motor can be reduced, thereby thinning the terminal device.

A terminal device100provided in this application may be but is not limited to a tablet terminal or a foldable terminal. The tablet terminal may be but is not limited to a phablet, a tablet personal computer (tablet personal computer), a tablet laptop computer (laptop computer), a tablet personal digital assistant (personal digital assistant, PDA), a tablet vehicle-mounted device, a tablet wearable device, or the like. The foldable terminal may be but is not limited to a foldable mobile phone or a foldable computer.

Referring toFIG.1andFIG.2,FIG.1is a schematic diagram of a structure of the terminal device100according to some embodiments of this application, andFIG.2is an exploded view of the terminal device100shown inFIG.1. The terminal device100shown inFIG.1is described by using the phablet as an example. In this embodiment, the terminal device100includes a screen101, a middle frame102, a back cover103, a primary circuit board104, a secondary circuit board105, a battery107, and a vibration motor108.

It can be understood thatFIG.1,FIG.2, and the following related accompanying drawings merely show examples of some components included in the terminal device100. Actual shapes, actual sizes, actual positions, and actual structures of these components are not limited byFIG.1,FIG.2, or any of the following accompanying drawings. In addition, when the terminal device100is a device in some other forms, the terminal device100may alternatively not include the screen101.

In the embodiment shown inFIG.1, the terminal device100is in the shape of a rectangular flat plate. For ease of description of the following embodiments, an XYZ coordinate system is established. Specifically, a width direction of the terminal device100is defined as an X-axis direction, a length direction of the terminal device100is defined as a Y-axis direction, and a thickness direction of the terminal device100is defined as a Z-axis direction. It can be understood that the coordinate system of the terminal device100may be flexibly set based on an actual requirement. This is not specifically limited herein. In some other embodiments, the terminal device100may be alternatively in the shape of a square flat plate, a round flat plate, an elliptical flat plate, or the like.

The screen101is configured to display images, videos, and the like. Referring toFIG.2, the screen101includes a light-transmitting cover plate101aand a display101b(English name: panel, also referred to as display panel). The light-transmitting cover plate101aand the display101bare stacked and fixedly connected through adhesion or the like. The light-transmitting cover plate101ais mainly configured to provide protection and dustproofing functions for the display101b. A material of the light-transmitting cover plate101aincludes but is not limited to glass. The display101bmay be a flexible display or a rigid display. For example, the display101bmay be an organic light-emitting diode (organic light-emitting diode, OLED) display, an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display, a mini light-emitting diode (mini organic light-emitting diode) display, a micro light-emitting diode (micro organic light-emitting diode) display, a micro organic light-emitting diode (micro organic light-emitting diode) display, a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display, a liquid crystal display (liquid crystal display, LCD), or the like.

Referring toFIG.2andFIG.3,FIG.3is a sectional view along line A-A inFIG.1. The middle frame102includes a bezel1021and a middle plate1022. The bezel1021is in the shape of a rectangular ring. The middle plate1022is fixed to an inner surface of the bezel1021around its perimeter. In other words, the bezel1021encircles an outer edge of the middle plate1022. For example, the middle plate1022may be fixed to the bezel1021through welding, or the middle plate1022and the bezel1021may be an integrally formed structure. The screen101is fixed to the bezel1021, and the bezel1021may encircle an edge of the screen101. Specifically, the light-transmitting cover plate101ais fixed to the bezel1021. In some embodiments, the light-transmitting cover plate101amay be fixed to the bezel1021through adhesion.

It can be understood that, in other embodiments, the bezel1021may be alternatively disposed only on one side edge, two adjacent side edges, two opposite side edges, or three side edges of the middle plate1022. This is not specifically limited herein.

The back cover103is located on a side of the middle plate1022farther away from the screen101, and the back cover103is fixed to the bezel1021. For example, the back cover103may be fixedly connected to an end face of an end of the bezel1021farther away from the screen101through adhesion. Alternatively, the back cover103and the bezel1021may be an integrally formed structure, that is, the bezel1021and the back cover103are an integral structure. An accommodating cavity C1is surrounded by the back cover103and the middle frame102. The primary circuit board104, the secondary circuit board105, the battery107, and the vibration motor108may be accommodated in the accommodating cavity C1.

The primary circuit board104is configured to integrate a control chip. The control chip may be, for example, an application processor (application processor, AP), a double data rate (double data rate, DDR) synchronous dynamic random access memory, or a universal flash storage (universal flash storage, UFS). In some embodiments, the primary circuit board104is electrically connected to the display101b, and the primary circuit board104is configured to control the display101bto display images or videos.

The primary circuit board104may be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The primary circuit board104may be an FR-4 dielectric slab, a Rogers (Rogers) dielectric slab, a hybrid FR-4/Rogers dielectric slab, or the like. Herein, FR-4 is a code of a flame-retardant material level, and the Rogers dielectric slab is a high-frequency board.

The secondary circuit board105is configured to integrate electronic components such as a radio frequency front-end of an antenna (for example, a5G antenna) and a universal serial bus (universal serial bus, USB) device. The secondary circuit board105may be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The secondary circuit board105may be an FR-4 dielectric slab, a Rogers (Rogers) dielectric slab, a hybrid FR-4/Rogers dielectric slab, or the like.

The secondary circuit board105is connected to the primary circuit board104via a connection component106, to implement data and signal transmission between the secondary circuit board105and the primary circuit board104. The connection component106may be a flexible circuit board (flexible printed circuit, FPC). In another embodiment, the connection component106may be alternatively a conducting wire or an enamelled wire.

The battery107is located between the primary circuit board104and the secondary circuit board105. The battery107is configured to supply power to electronic components such as the display101b, the primary circuit board104, and the secondary circuit board105in the terminal device100.

The vibration motor108is configured to implement functions such as notification of incoming calls, messages, SMS messages, weather, or news, and haptic feedback for trigger or accidental trigger.

Referring toFIG.3, the vibration motor108is located in the accommodating cavity C1. There may be one or more vibration motors108disposed in the terminal device100. This is not specifically limited herein.

Specifically, the vibration motor108may be fixed to a surface of the side of the middle plate1022farther away from the screen101. Referring toFIG.4,FIG.4is a stereogram of the vibration motor108in the terminal device100shown inFIG.3. A coordinate system inFIG.4is the same as the coordinate system inFIG.1. In other words, position relationships between all components in the vibration motor108inFIG.4in the coordinate system shown inFIG.4are the same as position relationships between all the components in the vibration motor108in the coordinate system shown inFIG.1when the vibration motor108is applied to the terminal device100shown inFIG.1.

The vibration motor108includes a housing1. The housing1is approximately in the shape of a cuboid. The housing1is provided with an accommodating space inside. The accommodating space is used to accommodate components such as a mass block and a driving assembly of the vibration motor108. A height direction of the housing1is parallel to the Z-axis direction. A length direction of the housing1is parallel to the X-axis direction. A width direction of the housing1is parallel to the Y-axis direction. Certainly, in another embodiment, alternatively, a length direction of the housing1may be parallel to the Y-axis direction, and a width direction of the housing1is parallel to the X-axis direction.

Referring toFIG.5,FIG.5is a schematic diagram of an assembly structure between the vibration motor108shown inFIG.4, and the middle frame102and the back cover103. The housing1is bonded to the middle plate1022of the middle frame102via an adhesive109. In another embodiment, the housing1may be alternatively fixed to the middle plate1022of the middle frame102through clamping, threaded connection, or the like. On this basis, to ensure connection stability between the housing1and the middle frame102, a side of the housing1farther away from the middle plate1022is further provided with a limiting structure110. The limiting structure110is fixedly connected to the middle frame102. The limiting structure110is configured to prevent the housing1from moving in a direction leaving the middle plate1022. In this embodiment, a mounting height h of the vibration motor108on the middle frame102is a sum of a thickness of the adhesive109, a height by which the vibration motor108protrudes from the middle plate1022, and a thickness of the limiting structure110.

It can be understood that, on condition that thicknesses of the screen101, the middle frame102, and the back cover103are fixed, a height by which the housing1of the vibration motor108protrudes from the middle plate1022is an important factor that affects a thickness of the terminal device100. In the foregoing embodiment, the housing1of the vibration motor108is in the shape of a cuboid, and when the vibration motor108is mounted on the middle plate1022of the middle frame102, the housing1entirely protrudes from the middle plate1022in the height direction of the housing1. In this case, if the terminal device100is to be further thinned, a height of the housing1needs to be reduced, and volumes of structures such as the mass block, a magnet assembly, a coil, and a damping structure inside the housing1also need to be correspondingly reduced, which has considerable impact on performance of the vibration motor108.

To resolve the contradiction between the thickness of the terminal device100and the performance of the vibration motor108, referring toFIG.6andFIG.7a,FIG.6is a stereogram of the vibration motor108according to some embodiments of this application, andFIG.7ais an exploded view of the housing1of the vibration motor108shown inFIG.6.

Specifically, referring toFIG.6, the vibration motor108includes the housing1, where the housing1is configured to perform waterproofing and dustproofing protection on structures inside the vibration motor108. A material of the housing1is metal, for example, stainless steel. In this way, a thickness of the housing1can be designed to be comparatively small on condition that structural strength is ensured. This helps reduce a thickness and volume of the vibration motor108. In some embodiments, the housing1is made of a metallic material having a magnetic insulation property. In this way, the housing1can prevent a magnetic field inside the vibration motor108from affecting performance of an antenna that is located around the vibration motor108and that is in the terminal device100.

Referring toFIG.6andFIG.7a, the housing1includes a side frame13, a first wall plate11, and a second wall plate12. The side frame13is in the shape of a rectangular ring. The side frame13includes a first side plate131and a second side plate132that are disposed opposite each other, and a third side plate133and a fourth side plate134that are disposed opposite each other. The first side plate131, the third side plate133, the second side plate132, and the fourth side plate134are sequentially connected end to end, thereby forming the side frame13through enclosure. The first wall plate11and the second wall plate12are disposed at two ends of the side frame13and opposite each other. An accommodating space1ais limited between the first wall plate11, the side frame13, and the second wall plate12. It can be understood that, in another embodiment, the side frame13may be alternatively in the shape of a circular ring or an elliptical ring.

In some embodiments, the housing1is formed by assembling two or more parts together, or may be formed as a whole through folding. For example, in some embodiments, the side frame13and the second wall plate12are an integral structure, and the first wall plate11is fixedly connected to the side frame13through screwing, adhesion, welding, or the like. In some other embodiments, the side frame13and the first wall plate11are an integral structure, and the second wall plate12is fixedly connected to the side frame13through screwing, adhesion, welding, or the like. In some still other embodiments, the side frame13is an integral structure, and the first wall plate11and the second wall plate12are fixedly connected to the side frame13through screwing, adhesion, welding, or the like. In some still other embodiments, the first wall plate11and part of the side frame13constitute a first part of the housing1, and the second wall plate12and part of the side frame13constitute a second part of the housing1, where the first part and the second part are fixedly connected to each other through screwing, adhesion, welding, or the like. Optionally, the first part is an integral structure, and the second part is an integral structure.

Specifically, referring toFIG.7a, the first wall plate11is in the shape of a flat plate. For example, the first wall plate11is a rectangular plate structure. A length direction of the first wall plate11is parallel to the X-axis direction. A width direction of the first wall plate11is parallel to the Y-axis direction. The first wall plate11has a first short side111and a second short side112that are opposite each other, and a first long side113and a second long side114that are opposite each other. An outer surface of the first wall plate11is provided with a first protruding portion115that protrudes in a direction leaving the accommodating space Ta. The first protruding portion115is hollow inside so that a first accommodating compartment115ais formed. The first accommodating compartment115acommunicates with the accommodating space Ta. In this way, some internal structures such as a coil42and a driving assembly4of the vibration motor108can be accommodated in the first accommodating compartment115a.

The “outer surface of the first wall plate11” is a surface of a side of the first wall plate11farther away from the accommodating space Ta, that is, a surface of a side of the first wall plate11farther away from the second wall plate12.

Still referring toFIG.7a, the first wall plate11is provided with a through communication opening116, the first protruding portion115is disposed at the communication opening116, and the first accommodating compartment115ain the first protruding portion115communicates with the accommodating space Ta in the housing1through the communication opening116. Specifically, the first protruding portion115includes a first top wall1151and a first encircling wall1152. The first encircling wall1152is in the shape of a ring. The first encircling wall1152encircles an outer edge of the first top wall1151. The first accommodating compartment115ais limited between the first top wall1151and the first encircling wall1152. An end of the first encircling wall1152farther away from the first top wall1151is fixedly connected to the first wall plate11. Optionally, the first encircling wall1152is perpendicular to the first top wall1151.

In some embodiments, an inner surface of the first encircling wall1152is level with an inner surface of the communication opening116. Specifically, an orthographic projection of the first protruding portion115on a plane in which the first wall plate11is located is a first projection, and an outline of the first projection coincides with an outline of the communication opening116. In another embodiment, referring toFIG.7b,FIG.7bis a sectional view of the housing1of the vibration motor108according to some other embodiments of this application. The first encircling wall1152of the first protruding portion115may alternatively surround an outer side of the communication opening116. In other words, the outline of the first projection is located on an outer side of the outline of the communication opening116.

In some embodiments, the outline of the orthographic projection of the first protruding portion115on the first wall plate11is in the shape of a circle, a rectangle, a rounded rectangle, a runway, an ellipse, or an irregular figure. A specific shape of the outline of the first projection may be adjusted and designed based on a shape of a specific component accommodated in the first accommodating compartment115a. This is not specifically limited in this application.

Referring toFIG.8,FIG.8is a schematic diagram of a partial structure of the middle plate1022of the middle frame102according to some embodiments of this application. The middle plate1022has a first surface1022aand a second surface1022bthat are opposite each other. The first surface1022afaces the back cover103. The second surface1022bfaces the screen101. The first surface1022ais provided with a recess1022crecessed toward the second surface1022b. An opening of the recess1022cfaces away from the screen101. In other words, the surface of the side of the middle plate1022farther away from the screen101is provided with the recess1022c. A bottom wall of the recess1022cis provided with a first avoiding hole1023. In this embodiment, the first avoiding hole1023is a through hole that penetrates the bottom wall of the recess1022c. In another embodiment, the first avoiding hole1023may be alternatively a blind hole. The “bottom wall of the recess1022c” is a wall face of the recess1022copposite the opening of the recess1022c.

Referring toFIG.9,FIG.9is a schematic diagram of assembly of the vibration motor108shown inFIG.6and the middle plate1022of the middle frame102shown inFIG.8. The vibration motor108is disposed in the recess1022c. Specifically, part of the vibration motor108may be accommodated in the recess1022c, and the other part of the vibration motor108is located outside the recess1022c. In another embodiment, alternatively, the entire vibration motor108may be disposed in the recess1022c. In this way, as at least part of the vibration motor108is disposed in the recess1022c, the height by which the vibration motor108protrudes from the middle plate1022can be reduced, thereby thinning the terminal device100and ensuring overall structural strength of the middle frame102.

In another embodiment, alternatively, the middle plate1022may be provided with no recess1022c. In this case, the first avoiding hole1023is directly formed in the middle plate1022.

Still referring toFIG.9, the outer surface of the first wall plate11faces the middle frame102, and the first protruding portion115is accommodated in the first avoiding hole1023. In some embodiments, the outer surface of the first wall plate11is fixedly connected to the bottom wall of the recess1022cvia the adhesive109.

Therefore, the first wall plate11is provided with the first protruding portion115that is hollow inside, so that some components such as the coil and the mass block of the vibration motor108can be accommodated in the first accommodating compartment115ain the first protruding portion115; in addition, the middle frame102is provided with the first avoiding hole1023corresponding to the first protruding portion115, so that the first protruding portion115is accommodated in the first avoiding hole1023. In this way, the height by which the vibration motor108protrudes from the middle plate1022can be reduced, thereby reducing the mounting height of the vibration motor108. Therefore, volumes of structures such as the mass block, the coil, the magnet assembly, and the damping structure inside the vibration motor108can be increased without increasing overall space occupied by the vibration motor108, so that overall performance of the vibration motor108can be improved without increasing the thickness of the terminal device100. Moreover, while the volumes of the structures inside the vibration motor108are kept unchanged, that is, while original performance of the vibration motor108is maintained, the mounting height of the vibration motor108can be reduced, so that the space occupied by the vibration motor108can be reduced, thereby thinning the terminal device100.

Referring toFIG.9, in this embodiment, a distance between an end of the first protruding portion115farther away from the first wall plate11and the outer surface of the first wall plate11is a first distance d1, and a distance between the second surface1022b(namely, a surface of a side of the middle plate1022closer to the screen101) of the middle plate1022and the outer surface of the first wall plate11is a second distance d2. The first distance d1is less than the second distance d2. In another embodiment, alternatively, the first distance d1may be equal to the second distance d2. In this way, the first protruding portion115can be prevented from extending out of the first avoiding hole1023, thereby avoiding interference between the first protruding portion115and a component such as the screen101of the terminal device100.

Based on the foregoing embodiment, to increase connection strength between the first protruding portion115and the first wall plate11and simplify a processing process, the first protruding portion115and the first wall plate11are an integral structure. For example, the first protruding portion115may be formed through stamping by using a stamping process.

In another embodiment, alternatively, the first protruding portion115and the first wall plate11may be separated in structure. In this case, the first protruding portion115may be fixedly connected to the first wall plate11through adhesion, welding, clamping, screwing, or the like. On this basis, to increase a contact area between the first protruding portion115and the first wall plate11and reduce assembly difficulty, referring toFIG.10a,FIG.10ais a sectional view of the housing1of the vibration motor108according to some other embodiments of this application. The first protruding portion115in this embodiment further includes a flanging portion1153in addition to the first encircling wall1152and the first top wall1151of the first protruding portion115shown inFIG.9.

Referring toFIG.10a, one end of the flanging portion1153is fixedly connected to the end of the first encircling wall1152farther away from the first top wall1151, and the other end of the flanging portion1153extends in a direction leaving the first encircling wall1152. Optionally, the flanging portion1153is parallel to the plane in which the first wall plate11is located. The first protruding portion115may be fixedly connected to the first wall plate11via the flanging portion1153.

For example, in the embodiment shown inFIG.10a, the flanging portion1153is fixedly connected to the outer surface of the first wall plate11. In some other embodiments, referring toFIG.10b,FIG.10bis a sectional view of the housing1of the vibration motor108according to some still other embodiments of this application. In the embodiments, the flanging portion1153is fixedly connected to an inner surface of the first wall plate11. In some still other embodiments, referring toFIG.10c,FIG.10cis a sectional view of the housing1of the vibration motor108according to some still other embodiments of this application. In the embodiments, part of the flanging portion1153is fixedly connected to an inner surface of the first wall plate11, and the other part of the flanging portion1153is fixedly connected to the outer surface of the first wall plate11.

The following describes an internal structure of the vibration motor108in some embodiments of this application. There are a plurality of types of internal structures of the vibration motor108.

For example, referring toFIG.11toFIG.13,FIG.11is an exploded view of the vibration motor108shown inFIG.6,FIG.12is a top view of the vibration motor108shown inFIG.6, andFIG.13is a sectional view along line B-B inFIG.12. In addition to the housing1, the vibration motor108further includes a mass block2, an elastic assembly3, a driving assembly4, a damping structure5, and an electrical connection structure6. It should be noted thatFIG.11toFIG.13merely show an example of some components included in the vibration motor108. Actual shapes, actual sizes, actual positions, and actual structures of these components are not limited byFIG.11toFIG.13.

The mass block2is located in the housing1. The mass block2is in the shape of a cuboid. In some other embodiments, the mass block2may be alternatively in the shape of a cube, a sphere, an ellipsoid, an irregular shape, or the like. As a vibration body in the vibration motor108, the mass block2can reciprocatively vibrate in a plane that is parallel to the plane in which the first wall plate11is located. Specifically, in the plane that is parallel to the plane in which the first wall plate11is located, a vibration path of the mass block2may be a straight line or a curve.

Referring toFIG.11andFIG.13, the vibration path of the mass block2is a straight line. Specifically, the mass block2may reciprocatively vibrate along a direction A1. In other words, the vibration motor108is a transverse linear motor. When the vibration motor108is applied to the terminal device100, a vibration direction of the mass block2is perpendicular to the thickness direction of the terminal device100. This helps reduce the mounting height of the vibration motor108in the terminal device100. In some other embodiments, alternatively, a vibration direction of the mass block2may be perpendicular to the plane in which the first wall plate11is located. In this case, the vibration motor108is a longitudinal linear motor. When the vibration motor108is applied to the terminal device100, the vibration direction of the mass block2is the same as the thickness direction of the terminal device100. In some still other embodiments, the vibration motor108may be alternatively a rotor motor.

In some embodiments, the vibration motor108may be an X-axis vibration motor, and the mass block2vibrates along the X-axis direction, so that the terminal device100generates vibration in the X-axis direction. It can be understood that the vibration direction of the mass block2may be set based on an actual requirement. This is not limited in this application. All of the following embodiments are described based on the case that the vibration motor108is the X-axis vibration motor, which shall not be considered as a special limitation on this application.

The elastic assembly3is configured to elastically support the mass block2in the housing1, and the elastic assembly3allows the mass block2to reciprocatively vibrate along the direction A1in the housing1. In some embodiments, referring toFIG.11andFIG.13, the elastic assembly3includes a first elastic part31and a second elastic part32. The first elastic part31and the second elastic part32are both spring plates. An arrangement direction of the first elastic part31, the mass block2, and the second elastic part32is parallel to the vibration direction A1of the mass block2.

Referring toFIG.11andFIG.13, the first elastic part31includes a first fixing portion311, a first connection portion313, and a second fixing portion312that are sequentially connected. The first fixing portion311is connected to the mass block2, where manners of the connection include but are not limited to welding and bonding. The second fixing portion312is connected to the first side plate131of the side frame13in the housing1, where manners of the connection include but are not limited to welding and bonding. The first connection portion313is approximately n-shaped. An arching direction A2of the first connection portion313is parallel to the plane in which the first wall plate11is located, and the arching direction A2of the first connection portion313is perpendicular to the vibration direction A1of the mass block2.

Still referring toFIG.11andFIG.13, the second elastic part32includes a third fixing portion321, a second connection portion323, and a fourth fixing portion322that are sequentially connected. The third fixing portion321is connected to the mass block2, where manners of the connection include but are not limited to welding and bonding. The fourth fixing portion322is connected to the second side plate132of the side frame13in the housing1, where manners of the connection include but are not limited to welding and bonding. The second connection portion323is approximately n-shaped. An arching direction A3of the second connection portion323is opposite to the arching direction A2of the first connection portion313.

In this way, the first elastic part31and the second elastic part32are both capable of deforming along a direction parallel to the vibration direction A1of the mass block2. When the mass block2vibrates in a direction approaching the first side plate131, an included angle between two arm portions of the first connection portion313is reduced, and an included angle between two arm portions of the second connection portion323is increased. When the mass block2vibrates in a direction approaching the second side plate132, the included angle between the two arm portions of the first connection portion313is increased, and the included angle between the two arm portions of the second connection portion323is reduced. Such a structure is simple and easy to implement.

It should be noted that, on condition of ensuring that the elastic assembly3can elastically support the mass block2in the housing1and the elastic assembly3allows the mass block2to reciprocatively vibrate along the direction A1in the housing1, the elastic assembly3may be alternatively designed into another structural form, which is not specifically limited herein.

The driving assembly4is configured to drive the mass block2to reciprocatively vibrate in the plane that is parallel to the plane in which the first wall plate11is located. In some embodiments, referring toFIG.11, the driving assembly4includes a magnet assembly41and a coil42. The magnet assembly41is fixed to the mass block2. The coil42is configured to cooperate with the magnet assembly41to drive the mass block2to reciprocatively vibrate relative to the housing1in the plane that is parallel to the plane in which the first wall plate11is located. Specifically, the coil42and the magnet assembly41cooperate to generate a Lorentz force, and the Lorentz force can drive the mass block2to reciprocatively vibrate in the plane that is parallel to the plane in which the first wall plate11is located.

In some embodiments, referring toFIG.13andFIG.14,FIG.14is a stereogram of the mass block2in the vibration motor108shown inFIG.11. The mass block2is provided with a mounting slot21, and the magnet assembly41is accommodated and fixed in the mounting slot21. Specifically, one end of the mounting slot21is open, and the open end of the mounting slot21faces the first wall plate11. In this way, an overall height of the vibration motor108can be reduced. Certainly, in some other embodiments, both ends of the mounting slot21may be open. Alternatively, in another embodiment, the mass block2may be provided with no mounting slot21. In this case, the magnet assembly41may be disposed on an outer surface of the mass block2.

The coil42and the magnet assembly may be arranged in the height direction of the housing1. Specifically, the coil42is located on a side of the magnet assembly41closer to the first wall plate11.

Referring toFIG.13andFIG.15,FIG.15is an exploded view of the magnet assembly41in the vibration motor108shown inFIG.11. Specifically, the magnet assembly41includes a first magnet411, a second magnet412, and a magnetoconductive part413. The first magnet411and the second magnet412are arranged at an interval in a direction parallel to the first wall plate11. Specifically, the first magnet411and the second magnet412are arranged at an interval in the direction A1. The first magnet411and the second magnet412may be iron magnets or steel magnets. A magnetization direction of the first magnet411and a magnetization direction of the second magnet412are both perpendicular to the plane in which the first wall plate11is located, and the magnetization direction of the first magnet411is opposite to the magnetization direction of the second magnet412. The magnetization direction is a direction from the north pole (namely, the N pole) to the south pole (namely, the S pole).

The magnetoconductive part413is located between the first magnet411and the second magnet412. Specifically, the first magnet411and the second magnet412are fixedly connected to two opposite side faces of the magnetoconductive part413, respectively. The magnetoconductive part413may be a yoke made of stacked silicon steel sheets. Therefore, the magnetoconductive part413is disposed between the first magnet411and the second magnet412, so that magnetic current strength between the first magnet411and the second magnet412can be increased, thereby increasing strength of driving the mass block2. In this way, a vibration effect is good, and magnetic leakage can be reduced, thereby increasing energy utilization. In addition, the first magnet411and the second magnet412may be integrated by using the magnetoconductive part413, thereby facilitating overall assembly of the magnet assembly41.

For example, referring toFIG.15andFIG.13, an end of the first magnet411farther away from the first wall plate11is the S pole and an end of the first magnet411closer to the first wall plate11is the N pole, whereas an end of the second magnet412farther away from the first wall plate11is the N pole and an end of the second magnet412closer to the first wall plate11is the S pole. In some other embodiments, alternatively, an end of the first magnet411farther away from the first wall plate11may be the N pole and an end of the first magnet411closer to the first wall plate11is the S pole, in which case an end of the second magnet412farther away from the first wall plate11is the S pole and an end of the second magnet412closer to the first wall plate11is the N pole.

When the coil42is powered on, the first magnet411and the second magnet412generate Lorentz forces F1and F2whose directions are parallel to the direction A1. The direction of F1is the same as that of F2. A combination of F1and F2can drive the mass block2to unidirectionally move in the plane that is parallel to the plane in which the first wall plate11is located. On this basis, the mass block2can be driven to reciprocatively vibrate through current commutation of the coil42. In some other embodiments, the magnet assembly41may alternatively include only one of the first magnet411and the second magnet412, so that one of F1and F2drives the mass block2to move in the plane that is parallel to the plane in which the first wall plate11is located.

It can be understood that, in some other embodiments, the magnet assembly41may alternatively include only the first magnet411and the second magnet412and be provided with no magnetoconductive part413. In some still other embodiments, alternatively, a third magnet rather than the magnetoconductive part413may be disposed between the first magnet411and the second magnet412, where the third magnet is an iron magnet or a steel magnet. A Halbach array is formed between the first magnet411, the second magnet412, and the third magnet, so that magnetic forces can be concentrated toward the mass block2, thereby increasing strength of driving the mass block2. The Halbach array is a permanent-magnet arrangement manner, where permanent magnets with different magnetization directions are arranged in a specific order, so that a magnetic field on one side of the Halbach array is significantly strengthened and a magnetic field on the other side of the Halbach array is significantly weakened.

The electrical connection structure6is configured to lead an electrode of the coil42out of the housing1. The electrical connection structure6may be but is not limited to a printed circuit board (printed circuit board, PCB), a flexible circuit board (flexible printed circuit board, FPC), or a structure formed by connecting a plurality of conducting wires via a flexible structure.

Referring toFIG.16,FIG.16is a stereogram of the electrical connection structure6in the vibration motor108shown inFIG.11. The electrical connection structure6includes a first segment61, a second segment62, and a third segment63that are sequentially connected. Referring toFIG.17,FIG.17is a schematic diagram of assembly of the electrical connection structure6shown inFIG.16and the first wall plate11. The first segment61is fixed to a compartment bottom wall of the first accommodating compartment115a, and the second segment62is fixed to an inner side wall of the first accommodating compartment115a. In other words, the first segment61is fixed to an inner surface of the first top wall1151, and the second segment62is fixed to an inner surface of the first encircling wall1152. The coil42is fixed to the first segment61and electrically connected to the first segment61. An extension path of the third segment63is parallel to the plane in which the first wall plate11is located, and part of the third segment63is located outside the housing1. The part of the third segment63located outside the housing1is provided with a positive terminal64and a negative terminal65. The electrical connection structure6may be electrically connected to the primary circuit board104or the secondary circuit board105via the positive terminal64and the negative terminal65, thereby implementing an electrical connection between the coil42and the primary circuit board104or the secondary circuit board105.

Based on the foregoing embodiment, to support and fix the part of the electrical connection structure6located outside the housing1, in some embodiments, referring toFIG.17, the first wall plate11is provided with a supporting portion117. The supporting portion117and the first wall plate11are coplanar. The part of the electrical connection structure6located outside the housing1is fixedly connected to the supporting portion117.

Optionally, the supporting portion117and the first wall plate11are an integral structure. In other words, the supporting portion117and the first wall plate11are integrated. This can simplify a processing process of the vibration motor108, reduce processing costs, and increase connection strength between the supporting portion117and the first wall plate11.

It can be understood that, in another embodiment, the first wall plate11may be alternatively provided with no supporting portion117. In the embodiment, when the vibration motor108is applied to the terminal device100, the third segment63of the electrical connection structure6may be fixed and supported via the middle frame102. In other words, when the vibration motor108is applied to the terminal device100, the third segment63of the electrical connection structure6is attached and fixed to the middle frame102, thereby fixing and supporting the third segment63via the middle frame102.

In the embodiment, referring toFIG.13, part of the coil42may be located in the first accommodating compartment115a, and the other part of the coil42is located in the accommodating space Ta. In this way, the accommodating space Ta occupied by the coil42in the housing1can be reduced. In another embodiment, alternatively, the entire coil42may be accommodated in the first accommodating compartment115a. Optionally, a shape of the first accommodating compartment115ais adapted to a shape of the coil42. In this way, space utilization in the first accommodating compartment115acan be maximized, and assembly difficulty of the coil42can be reduced.

On this basis, to make a structure of the vibration motor108more compact, still referring toFIG.13, an end of the coil42farther away from the first wall plate11is accommodated in the mounting slot21. In this case, part of the coil42may be accommodated in the first accommodating compartment115a, and the other part of the coil42may be accommodated in the mounting slot21.

The damping structure5is configured to provide damping for the mass block2so as to implement a function of quickly stopping vibration of the mass block2. In some embodiments, the damping structure5and the coil42cooperate to provide electromagnetic damping for the mass block2. Referring toFIG.11andFIG.13, the damping structure5forms a plate structure, and the damping structure5may be located on a side of the magnet assembly41farther away from the coil42. In other words, the damping structure5and the coil42are respectively located on two sides of the magnet assembly41. In another embodiment, alternatively, the damping structure5and the coil42may be located on one side of the magnet assembly41. Specifically, referring toFIG.13, the damping structure5may be bonded or welded to an inner surface of the second wall plate12.

To ensure a damping effect of the damping structure5, the damping structure5may be made of a material whose resistivity is low. For example, the damping structure5may be a metal piece such as an iron piece, an aluminum piece, a copper piece, or a silver piece. On this basis, to reduce costs of the damping structure5in addition to ensuring the damping effect of the damping structure5, the damping structure5may be a ring-shaped damping copper plate.

When the coil42is powered on, the coil42generates a changing electromagnetic field, and the magnet assembly41is subject to a magnetic field force. Under the action of the magnetic field force, the mass block2performs simple harmonic motion between the first elastic part31and the second elastic part32. Meanwhile, a magnetic line of the magnet assembly41cuts a magnetic induction line of the damping copper plate, and an induced current and an induced electromotive force are to be generated in the damping copper plate. When the coil42is powered off, a magnetic field force generated by the induced current of the damping copper plate obstructs motion of the mass block2, so that the mass block2can quickly stop vibrating.

In some other embodiments, the damping structure5may be alternatively a magnetic liquid. The magnetic liquid is a colloidal substance having a magnetic property. For example, outer layers of nanometric-scale magnetic particles (for example, nickel, cobalt, or iron oxides) are wrapped with a long-chain surfactant, and then the particles are evenly dispersed in a base fluid such as water, organic solvent, or oil, thereby forming a homogeneous and stable colloidal liquid. For example, a region between the magnet assembly41and the coil42may be filled with the magnetic liquid. Specifically, the magnetic liquid may adhere to an outer surface of the magnet assembly41. When the mass block2is vibrating, the magnetic liquid is compressed, and can generate a damping effect on the mass block2due to comparatively large viscosity resistance of the magnetic liquid.

In another embodiment, the damping structure5may be alternatively a magnetic liquid, a silica gel, a foam, or the like.

In the foregoing embodiments, as the first segment61of the electrical connection structure6and part of the coil42are accommodated in the first accommodating compartment115a, the accommodating space1aoccupied by the electrical connection structure6and the coil42in the housing1can be reduced, so that the structure of the vibration motor108is more compact; in addition, the volumes of the structures such as the mass block2and the magnet assembly41of the vibration motor108can be increased without increasing the overall mounting height of the vibration motor108, so that the overall performance of the vibration motor108can be improved without increasing the thickness of the terminal device100. Furthermore, while the volumes of the structures inside the vibration motor108are kept unchanged, that is, while the volumes of the magnet assembly41, the mass block2, and the like are not reduced and therefore the original performance of the vibration motor108is maintained, the mounting height of the vibration motor108can be reduced, thereby thinning the terminal device100.

It can be understood that, in another embodiment, alternatively, another structure in the vibration motor108may be disposed in the first accommodating compartment115a.

For example, in some other embodiments, referring toFIG.18,FIG.18is a sectional view of the vibration motor108according to some other embodiments of this application. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.13lies in that, in the vibration motor108in the embodiment shown inFIG.13, the first segment61of the electrical connection structure6and part of the coil42are disposed in the first accommodating compartment115a, whereas in the vibration motor108in this embodiment, only the first segment61of the electrical connection structure6is disposed in the first accommodating compartment115aand the entire coil42is located in the accommodating space Ta. In this way, the electrical connection structure6can be prevented from occupying the accommodating space1ain the housing1, so that the structure of the vibration motor108can also be more compact. In some still other embodiments, referring toFIG.19,FIG.19is a schematic diagram of assembly of the vibration motor108and the middle frame102according to some still other embodiments of this application. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.18lies in that the damping structure5of the vibration motor in this embodiment is disposed in the first accommodating compartment115a, the first segment61of the electrical connection structure6is fixed to an inner surface of the second wall plate12, and the coil42is fixedly connected to the first segment61of the electrical connection structure6. On this basis, to increase sensitivity of cooperation between the coil42and the magnet assembly41, an opening of the mounting slot21of the mass block2in this embodiment faces the second wall plate12. In other words, the mass block2in this embodiment is rotated by 180° relative to the mass block2in the vibration motor108shown inFIG.18.

In some still other embodiments, referring toFIG.20a,FIG.20ais a schematic diagram of assembly of the vibration motor108and the middle frame102according to some still other embodiments of this application. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.19lies in that, in the vibration motor108in this embodiment, not only the damping structure5but also part of the mass block2is disposed in the first accommodating compartment115a. Specifically, referring toFIG.20aandFIG.20b,FIG.20bis a stereogram of the mass block2in the vibration motor108shown inFIG.20a. The mass block2in this embodiment is provided with a second protruding portion22. The damping structure5and the second protruding portion22are both accommodated in the first accommodating compartment115a.

On this basis, to avoid interference between the second protruding portion22and the first encircling wall1152of the first protruding portion115during motion of the mass block2, an outer encircling wall of the second protruding portion22and the first encircling wall1152of the first protruding portion115need to be disposed at an interval, and a vibration stroke of the mass block2needs to be reserved.

In some still other embodiments, referring toFIG.21,FIG.21is a schematic diagram of assembly of the vibration motor108and the middle frame102according to some still other embodiments of this application. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.20alies in that, in the vibration motor108in this embodiment, the mass block2is provided with a second protruding portion22, where only the second protruding portion22of the mass block2is accommodated in the first accommodating compartment115a, and the damping structure5(not shown inFIG.21) is disposed in a position other than the first accommodating compartment115a. The damping structure5in this embodiment may be a magnetic liquid, a silica gel, a foam, or the like.

Therefore, volumes of structures such as the mass block2of the vibration motor108can be further increased without increasing the overall space occupied by the vibration motor108, so that the overall performance of the vibration motor108can be improved without increasing the thickness of the terminal device100. Moreover, while the volumes of the structures inside the vibration motor108are kept unchanged, that is, while the original performance of the vibration motor108is maintained, the mounting height of the vibration motor108can be reduced, so that the space occupied by the vibration motor108can be reduced, thereby thinning the terminal device100.

It can be understood that, based on any one of the foregoing embodiments, on condition of ensuring that the magnet assembly41can cooperate with the coil42to drive the mass block2to reciprocatively vibrate along the direction A1in the housing1, structures of the magnet assembly41and the coil42may be alternatively designed into other structural forms.

For example, referring toFIG.22toFIG.24,FIG.22is an exploded view of the vibration motor108according to some still other embodiments of this application,FIG.23is atop view of assembly of the vibration motor108shown inFIG.22and the middle plate1022of the middle frame102, andFIG.24is a sectional view along line C-C inFIG.23. A structure of the driving assembly4of the vibration motor108in this embodiment is different from that of the driving assembly4of the vibration motor108shown inFIG.13. The magnet assembly41and the coil42of the driving assembly4shown inFIG.13are disposed at an interval in the height direction of the housing1, whereas the magnet assembly41and the coil42in this embodiment are arranged in a direction parallel to the first wall plate11. Specifically, referring toFIG.22, the magnet assembly41and the coil42in this embodiment are arranged in the Y-axis direction. The magnet assembly41includes a first magnet411and a second magnet412that are spaced apart in the direction A2. A magnetic gap K (also referred to as “magnetic gap”) is formed between the first magnet411and the second magnet412. The coil42is disposed in the magnetic gap K. In this way, sizes of the coil42and the magnet assembly41in the height direction of the housing1can be set to comparatively large values.

Referring toFIG.24, same as that in the vibration motor108in the embodiment shown inFIG.13, the first segment61of the electrical connection structure6and part of the coil42are disposed in the first accommodating compartment115ain this embodiment.

In another embodiment, based on an actual requirement, alternatively, only the first segment61of the electrical connection structure6may be disposed in the first accommodating compartment115a; or the mass block2is provided with a second protruding portion22, where the second protruding portion22is disposed in the first accommodating compartment115a; or the damping structure5is disposed in the first accommodating compartment115a; or the mass block2is provided with a second protruding portion22, where the second protruding portion22and the damping structure5are both disposed in the first accommodating compartment115a. In addition, part of the magnet assembly41may be disposed in the first accommodating compartment115a.

Based on any one of the foregoing embodiments, to increase space in the first accommodating compartment115aand reduce processing difficulty of the vibration motor108, referring toFIG.25atoFIG.26,FIG.25ais a stereogram of the vibration motor108according to some other embodiments of this application,FIG.25bis an enlarged view of a region A inFIG.25a, andFIG.26is an exploded view of the vibration motor108shown inFIG.25a. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.6lies in that a side wall of the first protruding portion115in the vibration motor108shown inFIG.6is in the shape of a ring, whereas a side wall of the first protruding portion115in this embodiment includes a first side wall1154and a second side wall1155that are opposite each other. Specifically, the first side wall1154and the second side wall1155are disposed opposite each other in the X-axis direction. Two ends of the first side wall1154in a length direction of the first side wall1154both extend to be level with the outer edge of the first wall plate11. Two ends of the second side wall1155in a length direction of the second side wall1155both extend to be level with the outer edge of the first wall plate11. In this way, a processing process of the first protruding portion115can be simplified, and accommodating space in the first accommodating compartment115acan be increased. It can be understood that, in another embodiment, the first side wall1154and the second side wall1155may be alternatively disposed opposite each other in the Y-axis direction.

Optionally, a length of the first side wall1154is equal to a length of the first short side111of the first wall plate11, and a length of the second side wall1155is equal to the length of the first short side111of the first wall plate11.

It can be understood that, as the two ends of the first side wall1154in the length direction of the first side wall1154both extend to be level with the outer edge of the first wall plate11and the two ends of the second side wall1155in the length direction of the second side wall1155both extend to be level with the outer edge of the first wall plate11, referring toFIG.27a,FIG.27ais an exploded view of the housing1of the vibration motor108shown inFIG.25a. Notches are formed at both ends of the first accommodating compartment115ain a length direction of the first accommodating compartment115a. To increase airtightness of the housing1, blocking plates135are disposed on the side frame13in positions corresponding to the notches. The blocking plates135block the notches. On this basis, to avoid addition of heights of the third segment63of the electrical connection structure6and the housing1, the blocking plate135is provided with an avoiding opening135a, and the third segment63of the electrical connection structure6is disposed in the avoiding opening135ain a passing-through manner.

Referring toFIG.25atoFIG.26, for ease of supporting and fixing the part of the third segment63of the electrical connection structure6located outside the housing1, the supporting portion117may be disposed on the first top wall1151of the first protruding portion115.

Based on the foregoing embodiment, referring toFIG.27b,FIG.27bis a schematic diagram of assembly of the vibration motor108shown inFIG.26and the middle frame102. The first avoiding hole1023is a blind hole. In this way, airtightness of the middle frame102can be ensured, thereby increasing reliability of the terminal device100.

In some embodiments, when the first avoiding hole1023is formed as a through hole, to increase airtightness between the vibration motor108and the middle plate1022and ensure an effect between the vibration motor108and the middle plate1022, referring toFIG.27candFIG.27d,FIG.27cis an exploded view of the vibration motor108and the middle frame102according to some other embodiments of this application.

A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.6lies in that, in this embodiment, the first wall plate11of the vibration motor108includes a first wall plate body11aand an extension plate11b. The extension plate11bis disposed on an outer edge of the first wall plate body11a, and the extension plate11band the first wall plate body11aare coplanar.

Referring toFIG.27d,FIG.27dis a schematic diagram of a position relationship between an outline of an orthographic projection of the first avoiding hole1023on the plane in which the first wall plate11of the vibration motor shown inFIG.27cis located and the first wall plate11. The orthographic projection of the first avoiding hole1023on the plane in which the first wall plate11is located is a second projection S. The outline of the second projection S is located on the inner side of the outer edge of the first wall plate11, and the outline of the second projection S and the outer edge of the first wall plate11are spaced apart. The extension plate11bmay be in the shape of an arc, a polygon, or the like. In this way, as the first wall plate11is provided with the extension plate11b, a contact area between the first wall plate11and the middle plate1022can be increased, so that a sealing part can be disposed between the first wall plate11and the middle plate1022to improve a sealing effect between the first wall plate11and the first avoiding hole1023.

Optionally, the sealing part is the adhesive109. In this way, the sealing effect between the first wall plate11and the first avoiding hole1023can be ensured, and furthermore, the first wall plate11can be fixedly connected to the middle plate1022via the adhesive109, thereby simplifying the structure of the vibration motor108.

Based on any one of the foregoing embodiments, to limit a position of the vibration motor108and prevent the vibration motor108from moving in the direction leaving the middle plate1022, the terminal device100further includes the limiting structure110. A limiting space C2is limited between the limiting structure110and the middle plate1022. The vibration motor108is disposed in the limiting space C2.

Referring toFIG.28,FIG.28is a stereogram of assembly of the limiting structure110, the vibration motor108, and the middle frame102in the terminal device100according to some embodiments of this application. The limiting structure110includes a limiting portion110aand a connection lug110b. Specifically, the limiting portion110ais opposite the second wall plate12of the vibration motor108, the limiting portion110ais in the shape of a long strip, and a length direction of the limiting portion110ais parallel to the X-axis direction. The limiting portion110acan limit the position of the vibration motor108and prevent the vibration motor108from moving in the direction leaving the middle plate1022.

The connection lug110bis fixedly connected to the limiting portion110a. The limiting structure110is fixedly connected to the middle frame102via the connection lug110b. Specifically, there may be one or more connection lugs110b. The term “a plurality of” in this application means two or more. For example, referring toFIG.28, there are two connection lugs110b. The two connection lugs110bare fixedly connected to two ends of the limiting portion110ain a length direction of the limiting portion110a, respectively. The limiting structure110is fixedly connected to the middle frame102via the two connection lugs110b. For example, the connection lug110bmay be fixedly connected to the middle plate1022through screwing, adhesion, clamping, or the like. In this way, the limiting structure110can limit the position of the vibration motor108and prevent the vibration motor108from moving in a direction leaving the middle frame102.

Optionally, the limiting portion110aand the connection lug110bare an integral structure. This can simplify a processing process of the limiting structure110and reduce processing costs.

In some embodiments, a material of the limiting structure110is metal, for example, stainless steel. In this way, the thickness of the limiting structure110can be designed to be comparatively small on condition that structural strength is ensured. This helps reduce space occupied by the limiting structure110.

Based on the foregoing embodiment, to avoid friction noise between the housing1of the vibration motor108and the limiting structure110, referring toFIG.29andFIG.30,FIG.29is a top view of the vibration motor108shown inFIG.28, andFIG.30is a sectional view along line D-D inFIG.29. A buffer part200is disposed between the vibration motor108and the limiting structure110. Optionally, the buffer part200is a foam, a silica gel, or the like.

It can be understood that, in another embodiment, the limiting structure110may be alternatively another structure, provided that the structure can prevent the vibration motor108from moving in the direction leaving the middle plate1022.

On this basis, to further thin the terminal device100while ensuring vibration performance of the vibration motor108or further improve the overall performance of the vibration motor108without increasing the thickness of the terminal device100, in some other embodiments, referring toFIG.31,FIG.31is a stereogram of assembly of the vibration motor108, the middle frame102, and the limiting structure110in the terminal device100according to some other embodiments of this application. A difference between the terminal device100in this embodiment and the terminal device100shown inFIG.28lies in that, in the vibration motor108in this embodiment, not only the first wall plate11of the housing1is provided with the first protruding portion115, but also the second wall plate12of the housing1is provided with a third protruding portion121, and in addition, the limiting portion110aof the limiting structure110is provided with a second avoiding hole110ccorresponding to the third protruding portion121, so that the third protruding portion121is accommodated in the second avoiding hole110c.

Specifically, referring toFIG.32andFIG.33,FIG.32is an exploded view of the vibration motor108and the limiting structure110in the stereogram of assembly shown in FIG.31; andFIG.33is a stereogram of the side frame13and the second wall plate12of the housing1in the vibration motor108shown inFIG.32, viewed from the inside to the outside. The second wall plate12is in the shape of a rectangular flat plate. The second wall plate12is opposite the first wall plate11, and the second wall plate12is parallel to the first wall plate11. The second wall plate12is provided with the third protruding portion121that protrudes in a direction leaving the accommodating space Ta. The third protruding portion121is hollow inside so that a second accommodating compartment121ais formed. The second accommodating compartment121acommunicates with the accommodating space Ta. In this way, structures inside the vibration motor108can be accommodated in the second accommodating compartment121a.

Referring toFIG.32andFIG.33, the third protruding portion121includes a second top wall1211and a second encircling wall1212. The second encircling wall1212is in the shape of a ring. The second encircling wall1212encircles an outer edge of the second top wall1211. The second accommodating compartment121ais limited between the second top wall1211and the second encircling wall1212. Optionally, an outline of an orthographic projection of the second protruding portion22on the second wall plate12is in the shape of a circle, a rectangle, a rounded rectangle, a runway, an ellipse, or an irregular figure. A specific shape of the outline of the orthographic projection of the second protruding portion22on the second wall plate12may be adjusted and designed based on a shape of a specific component accommodated in the second accommodating compartment121a. This is not specifically limited in this application.

Referring toFIG.31andFIG.32, the second avoiding hole110cis a through hole formed in the limiting portion110a. In another embodiment, the second avoiding hole110cmay be alternatively a blind hole. On this basis, the buffer part200between the vibration motor108and the limiting structure110is in the shape of a ring.

In the embodiment, the first wall plate11is provided with the first protruding portion115that is hollow inside and the middle frame102is provided with the first avoiding hole1023corresponding to the first protruding portion115, so that the first protruding portion115is accommodated in the first avoiding hole1023; in addition, the second wall plate12is provided with the second protruding portion22that is hollow inside and the limiting structure110is provided with the second avoiding hole110ccorresponding to the second protruding portion22, so that the second protruding portion22is accommodated in the second avoiding hole110c. In this way, not only some of the structures in the vibration motor108can be disposed in the first accommodating compartment115ain the first protruding portion115, but also some of the structures in the vibration motor108can be disposed in the second accommodating compartment121ain the second protruding portion22. Hence, the terminal device100can be further thinned while the vibration performance of the vibration motor108is ensured. Moreover, the overall performance of the vibration motor108can be further improved without increasing the thickness of the terminal device100.

The following describes layout of the structures inside the vibration motor108having the hollow first protruding portion115and the hollow second protruding portion22.

Referring toFIG.34andFIG.35,FIG.34is a top view of the stereogram of assembly shown inFIG.31, andFIG.35is a sectional view along line E-E inFIG.34. Structures of the mass block2, the elastic assembly3, the driving assembly4, the damping structure5, and the electrical connection structure6of the vibration motor108in this embodiment are the same as those of the mass block2, the elastic assembly3, the driving assembly4, the damping structure5, and the electrical connection structure6of the vibration motor108shown inFIG.13.

In this embodiment, the first segment61of the electrical connection structure6and part of the coil42are disposed in the first accommodating compartment115a, and the damping structure5is disposed in the second accommodating compartment121a. Specifically, the damping structure5may be fixed to an inner surface of the second top wall1211. Therefore, the volumes of the structures such as the mass block2, the coil42, and the magnet assembly41inside the vibration motor108can be increased without increasing the overall space occupied by the vibration motor108, so that the overall performance of the vibration motor108can be improved without increasing the thickness of the terminal device100. Moreover, while the volumes of the structures inside the vibration motor108are kept unchanged, that is, while the original performance of the vibration motor108is maintained, the mounting height of the vibration motor108can be reduced, so that the space occupied by the vibration motor108can be reduced, thereby thinning the terminal device100.

In some still other embodiments, referring toFIG.36,FIG.36is a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle plate1022of the middle frame102according to some still other embodiments of this application. A difference between this embodiment and the embodiment shown inFIG.35lies in that the mass block2in this embodiment is provided with a second protruding portion22that protrudes toward the limiting structure110, where the damping structure5and the second protruding portion22are both accommodated in the second accommodating compartment121a.

Based on the foregoing embodiment, to avoid interference between an outer encircling wall of the second protruding portion22and the second encircling wall1212of the third protruding portion121during motion of the mass block2, the outer encircling wall of the second protruding portion22and the second encircling wall1212of the third protruding portion121need to be disposed at an interval, and a vibration stroke of the mass block2needs to be reserved.

In some still other embodiments, referring toFIG.37,FIG.37is a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle plate1022of the middle frame102according to some still other embodiments of this application. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.36lies in that, in this embodiment, only the second protruding portion22of the mass block2is accommodated in the second accommodating compartment121a, and the damping structure5(not shown inFIG.37) is disposed in a position other than the second accommodating compartment121a. The damping structure5in this embodiment may be a magnetic liquid, a silica gel, a foam, or the like.

In some still other embodiments, referring toFIG.38a,FIG.38ais a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle plate1022of the middle frame102according to some still other embodiments of this application. Same as those of the vibration motor108in the embodiment shown inFIG.24, the magnet assembly41and the coil42of the vibration motor108in this embodiment are arranged in a direction parallel to the first wall plate11. On this basis, in this embodiment, the first segment61of the electrical connection structure6and the coil42may be disposed in the first accommodating compartment115a, and the mass block2is provided with a second protruding portion22, where the second protruding portion22and the damping structure5are accommodated in the second accommodating compartment121a.

Certainly, in another embodiment, alternatively, the first segment61of the electrical connection structure6and the coil42may be disposed in the first accommodating compartment115a, and only the damping structure5or the second protruding portion22is accommodated in the second accommodating compartment121a.

For example, referring toFIG.38b,FIG.38bis a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle plate1022of the middle frame102according to some still other embodiments of this application. In the embodiments, the first segment61of the electrical connection structure6and the coil42are disposed in the first accommodating compartment115a, and only the damping structure5is accommodated in the second accommodating compartment121a.

For another example, referring toFIG.38c,FIG.38cis a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle plate1022of the middle frame102according to some still other embodiments of this application. In the embodiments, the first segment61of the electrical connection structure6and the coil42are disposed in the first accommodating compartment115a, and the second protruding portion22is accommodated in the second accommodating compartment121a.

In addition, when the magnet assembly41and the coil42are arranged in the direction parallel to the first wall plate11, referring toFIG.39a,FIG.39ais a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle plate1022of the middle frame102according to some still other embodiments of this application. A difference between this embodiment and the terminal device100shown inFIG.38blies in that the mounting slot21in the mass block2in this embodiment forms a through slot whose two ends are open, the magnet assembly41is fixed in the mounting slot21, and an end of the magnet assembly41farther away from the first wall plate11is accommodated in the second accommodating compartment121a. Specifically, the end of the magnet assembly41farther away from the first wall plate11may pass through the mounting slot21and be accommodated in the second accommodating compartment121a. An end of the coil42farther away from the first wall plate11is accommodated in the second accommodating compartment121a. The end of the coil42farther away from the first wall plate11may pass through the mounting slot21and be accommodated in the second accommodating compartment121a. Certainly, in another embodiment, referring toFIG.39b, alternatively, only the end of the magnet assembly41farther away from the first wall plate11may be accommodated in the second accommodating compartment121a, and the end of the coil42farther away from the first wall plate11is not accommodated in the second accommodating compartment121a. Alternatively, referring toFIG.39c, only the end of the coil42farther away from the first wall plate11may be accommodated in the second accommodating compartment121a, and the end of the magnet assembly41farther away from the first wall plate11is not accommodated in the second accommodating compartment121a.

It can be understood that, in any one of the foregoing embodiments, a component disposed in the first accommodating compartment115aand a component disposed in the second accommodating compartment121aare interchangeable.

In another embodiment, alternatively, only the second wall plate12may be provided with a third protruding portion121whereas the first wall plate11is provided with no first protruding portion115, and the limiting structure110is provided with a second avoiding hole110ccorresponding to the third protruding portion121, so that the third protruding portion121is accommodated in the second avoiding hole110c. In this way, the volumes of the structures such as the mass block2, the coil42, and the magnet assembly41inside the vibration motor108can also be increased without increasing the overall space occupied by the vibration motor108, so that the overall performance of the vibration motor108can be improved without increasing the thickness of the terminal device100. Moreover, while the volumes of the structures inside the vibration motor108are kept unchanged, that is, while the original performance of the vibration motor108is maintained, the mounting height of the vibration motor108can be reduced, so that the space occupied by the vibration motor108can be reduced, thereby thinning the terminal device100.

The following describes layout of the structures inside the vibration motor108in which only the second wall plate12is provided with the third protruding portion121whereas the first wall plate11is provided with no first protruding portion115.

Referring toFIG.40,FIG.40is a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle frame102according to some still other embodiments of this application. Structures of the mass block2, the elastic assembly3, the driving assembly4, the damping structure5, and the electrical connection structure6of the vibration motor108in this embodiment are the same as those of the mass block2, the elastic assembly3, the driving assembly4, the damping structure5, and the electrical connection structure6of the vibration motor108shown inFIG.35. A difference between the vibration motor108in this embodiment and the vibration motor108in the embodiment shown inFIG.35lies in that, in the vibration motor108in this embodiment, because only the second wall plate12is provided with the hollow third protruding portion121whereas the first wall plate11is provided with no first protruding portion115, during assembly, the damping structure5is disposed in the second accommodating compartment121ain the second protruding portion22and the electrical connection structure6is directly fixedly connected to the inner surface of the first wall plate11. Specifically, in this embodiment, the first segment61and the second segment62of the electrical connection structure6are located in a same plane, and the first segment61and the second segment62of the electrical connection structure6are both fixed to the inner surface of the first wall plate11.

Referring toFIG.41,FIG.41is a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle frame102according to some still other embodiments of this application. A difference between the terminal device100in this embodiment and the terminal device100inFIG.40lies in that, in this embodiment, the damping structure5is disposed in the second accommodating compartment121a, and the mass block2is further provided with a second protruding portion22, where the second protruding portion22is accommodated in the second accommodating compartment121a.

On this basis, referring toFIG.42,FIG.42is a schematic diagram of assembly of the limiting structure110, the vibration motor108, and the middle frame102according to some still other embodiments of this application. In this case, alternatively, only the second protruding portion22of the mass block2may be accommodated in the second accommodating compartment121a, and the damping structure5(not shown inFIG.42) is disposed in a position other than the second accommodating compartment121a.

It can be understood that, when the magnet assembly41and the coil42are arranged in the direction parallel to the first wall plate11, alternatively, the damping structure5and/or the second protruding portion22may be disposed in the second accommodating compartment121a. In addition, when the magnet assembly41and the coil42are arranged in the direction parallel to the first wall plate11, the magnet assembly41and the coil42may also be disposed in the second accommodating compartment121a.

Referring toFIG.43,FIG.43is a sectional view of the vibration motor108according to some still other embodiments of this application. The magnet assembly41and the coil42in this embodiment are arranged in the direction parallel to the first wall plate11, and the through mounting slot21is formed in the mass block2in this embodiment, that is, both ends of the mounting slot21are open. An end of the magnet assembly41closer to the second wall plate12passes through the mounting slot21and is accommodated in the second accommodating compartment121a. An end of the coil42closer to the second wall plate12passes through the mounting slot21and is accommodated in the second accommodating compartment121a.

Certainly, in another embodiment, alternatively, only the end of the coil42closer to the second wall plate12may pass through the mounting slot21and be accommodated in the second accommodating compartment121a.

Referring toFIG.44,FIG.44is a sectional view of the vibration motor108according to some still other embodiments of this application. A difference between the vibration motor108in this embodiment and the vibration motor108shown inFIG.40lies in that, in the vibration motor108in this embodiment, the first segment61of the electrical connection structure6and the coil42are disposed in the second accommodating compartment121a. On this basis, to increase sensitivity of cooperation between the coil42and the magnet assembly41, the mass block2in this embodiment may be rotated by 180° relative to the mass block2in the vibration motor108shown inFIG.40.

The specific features, structures, materials, or characteristics described in this specification may be combined in a suitable manner in any one or more embodiments or examples.

In conclusion, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of this application, but not for limiting this application. Although this application is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of this application.