Sound production device

Abstract

This invention provides a sound-generating device, comprising: a frame; a vibration system including a diaphragm and a voice coil; and a magnetic circuit system including a yoke, a main magnet and a secondary magnet stacked and fixed on the side of the yoke near the diaphragm; the secondary magnet and the main magnet are spaced apart to form a magnetic gap; the sound-generating device also includes an elastic support member located outside the voice coil; the elastic support member includes a first connecting portion, a second connecting portion, and an elastic portion elastically connecting the first connecting portion and the second connecting portion; the first connecting portion and the second connecting portion are respectively disposed on opposite sides of the secondary magnet along the vibration direction, the first connecting portion is fixed on the side of the secondary magnet away from the diaphragm along the vibration direction, and the second connecting portion is fixed on the side of the diaphragm near the magnetic circuit system along the vibration direction and electrically connected to the voice coil; the elastic portion has a U-shaped structure. Compared with related technologies, the sound-generating device of this invention has a long service life, saves installation space, and has excellent acoustic performance.

Description

[Technical Field]

[0001] This utility model relates to the field of electroacoustic conversion technology, and in particular to a sound-generating device. [Background Technology]

[0002] With the development of electronic technology, portable consumer electronics products are becoming increasingly popular, such as mobile phones, handheld game consoles, navigation devices, and handheld multimedia entertainment devices. These electronic products generally use sound-generating devices for system feedback, such as call alerts, message alerts, and navigation prompts on mobile phones, and vibration feedback on game consoles. The sound-generating device used in mobile phones has become one of the most important components.

[0003] The sound-generating device of the related technology includes a basket frame, a vibration system fixed to the basket frame, and a magnetic circuit system for driving the vibration system to vibrate. The vibration system includes a diaphragm fixed to the basket frame and a voice coil that drives the diaphragm to vibrate and generate sound. The sound-generating device also includes an elastic connection structure, one end of which is fixed to the basket frame, and the other end extends to one side of the voice coil and is electrically connected to the voice coil.

[0004] However, the lever arm of the elastic connection structure of the sound-generating device in the related technology is a planar structure. When vibrating, the connection is maintained by shear deformation of the excess linear lever arm. The planar structure deformable lever arm will not only have internal stress, but also shear stress of deformation, resulting in poor vibration performance.

[0005] Therefore, it is necessary to provide a new sound-generating device to solve the above-mentioned technical problems. [Utility Model Content]

[0006] The purpose of this invention is to provide a sound-generating device that has a long service life, saves installation space, and has excellent acoustic performance.

[0007] To achieve the above objectives, this utility model provides a sound-generating device, the sound-generating device comprising:

[0008] Sink stand;

[0009] A vibration system, comprising a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound; and,

[0010] A magnetic circuit system comprising a magnetic yoke fixed to the side of the frame away from the vibrating system, a main magnet stacked and fixed to the side of the magnetic yoke near the diaphragm, and a secondary magnet stacked and fixed to the side of the magnetic yoke near the diaphragm, wherein the secondary magnet and the main magnet are spaced apart to form a magnetic gap; the voice coil is inserted into the magnetic gap; characterized in that...

[0011] The sound-generating device also includes an elastic support member located outside the voice coil;

[0012] The elastic support includes a first connecting portion, a second connecting portion, and an elastic portion that elastically connects the first connecting portion and the second connecting portion; the first connecting portion and the second connecting portion are respectively disposed on opposite sides of the auxiliary magnet along the vibration direction, the first connecting portion is fixed to the side of the auxiliary magnet away from the diaphragm along the vibration direction, and the second connecting portion is fixed to the side of the diaphragm close to the magnetic circuit system along the vibration direction and is electrically connected to the voice coil; the elastic portion has a U-shaped structure and is spaced apart from the auxiliary magnet.

[0013] Preferably, the voice coil includes a rectangular voice coil body and two first recesses formed by recesses on opposite sides of the voice coil body in a direction that brings them closer to each other;

[0014] The main magnet includes a rectangular main magnet body and two second recesses formed by recesses on opposite sides of the main magnet body moving toward each other; the voice coil body surrounds the outer periphery of the main magnet body, and the first recess is disposed within the second recess; the projection of the second connecting portion along the vibration direction falls into the first recess.

[0015] Preferably, the auxiliary magnet includes a ring-shaped auxiliary magnet body stacked and fixed to the magnetic yoke, two protrusions formed by opposite sides of the auxiliary magnet body protruding towards each other, and the second connecting portion is spaced apart from the protrusions along the vibration direction.

[0016] Preferably, the protrusion is recessed on the side away from the voice coil to form a groove;

[0017] The elastic part includes a first elastic arm, a second elastic arm, and an arc-shaped structure that fixes the first elastic arm and the second elastic arm together; the first elastic arm is fixedly connected to the first connecting part, the second elastic arm is fixedly connected to the second connecting part, and the arc-shaped structure is disposed in the groove and spaced apart from the magnetic circuit system.

[0018] Preferably, the elastic support includes two members, and the two elastic portions of the two elastic supports are respectively disposed in the two grooves, and the opening directions of the two elastic portions are arranged facing each other along the short axis direction of the main magnet body.

[0019] Preferably, the sound-generating device further includes an annular sub-core, which is stacked and fixed on the side of the sub-magnet near the diaphragm. The projection of the sub-core along the vibration direction completely overlaps with the main magnet. The sub-core is provided with a relief groove that is recessed from the surface facing the diaphragm away from the vibration direction. The relief groove is spaced apart from the second spring arm along the vibration direction.

[0020] Preferably, the magnetic yoke includes a magnetic yoke body fixed to the basin frame and a clearance groove formed through the magnetic yoke body, the clearance groove communicating with the groove;

[0021] The sound-generating device also includes a sealing cover, which is disposed in the clearance groove along with the first connecting part. The sealing cover is fixedly placed in the groove.

[0022] Preferably, the sealing cover includes a sealing body and a limiting portion formed by bending and extending the sealing body from one end away from the main magnet toward the diaphragm; the sealing body is disposed in the clearance groove, and the limiting portion is fixed to the auxiliary magnet.

[0023] Preferably, the sound-generating device further includes a boss recessed on the side of the protrusion away from the voice coil, the boss being located within the groove; the limiting portion is disposed within the boss.

[0024] Preferably, the elastic support includes a spring sheet electrically connected to the voice coil and an adapter assembly electrically connected to the spring sheet and fixed to the auxiliary magnet on the side away from the diaphragm along the vibration direction. The adapter assembly includes a conductive connector electrically connected to the spring sheet and a molding compound injection-molded into the conductive connector. The spring sheet includes a second connecting portion, the elastic portion, and a connecting end that electrically connects the elastic portion to the conductive connector. The connecting end and the adapter assembly form the first connecting portion.

[0025] Preferably, the molding compound is fixed within the clearance groove, and the side of the molding compound closest to the sealing cap abuts against the sealing cap.

[0026] Preferably, the magnetic yoke further includes a protrusion formed by the sidewall of the clearance groove extending toward each other, and the molding compound is integrally injection molded with the protrusion.

[0027] Compared with related technologies, the sound-generating device of this utility model has an elastic support located outside the voice coil. The elastic support includes a first connecting part, a second connecting part, and an elastic part that elastically connects the first connecting part and the second connecting part. The first connecting part and the second connecting part are respectively disposed on opposite sides of the auxiliary magnet along the vibration direction. The first connecting part is fixed to the side of the auxiliary magnet away from the diaphragm along the vibration direction, and the second connecting part is fixed to the side of the diaphragm close to the magnetic circuit system along the vibration direction and electrically connected to the voice coil. The elastic part has a U-shaped structure. The elastic part is spaced apart from the auxiliary magnet. This significantly reduces the stress received by the elastic part during vibration compared to a planar structure, and greatly improves the vibration life of the elastic support. At the same time, the overall planar space occupied is greatly reduced, which can be used to increase the volume of other components and improve the acoustic performance of the product. In addition, placing the elastic support outside the voice coil avoids the three-dimensional elastic support passing through the magnetic circuit, reducing the manufacturing difficulty. Furthermore, the main magnet contributes more to the performance than the auxiliary magnet. The design outside the voice coil makes full use of the outer space, and the main magnet, which contributes more, remains intact and has better performance. [Attached Image Description]

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of the sound-generating device provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a schematic diagram of the internal structure of the sound-generating device provided in Embodiment 1 of this utility model;

[0031] Figure 3 This is an exploded structural diagram of the sound-generating device provided in Embodiment 1 of this utility model;

[0032] Figure 4 for Figure 1 AA-line sectional view;

[0033] Figure 5 This is a schematic diagram of the structure of the auxiliary magnet of the sound-generating device provided in Embodiment 1 of this utility model;

[0034] Figure 6 A schematic diagram of the elastic part of the sound-generating device provided in Embodiment 1 of this utility model;

[0035] Figure 7 A partially exploded structural diagram of the sound-generating device provided in Embodiment 1 of this utility model;

[0036] Figure 8 This is a schematic diagram of the structure of the sound-generating device provided in Embodiment 2 of this utility model;

[0037] Figure 9 for Figure 8 BB line section view;

[0038] Figure 10 This is an exploded structural diagram of the sound-generating device provided in Embodiment 2 of this utility model.

[0039] In the diagram, 100 is the sound-generating device; 1 is the frame; 2 is the vibration system; 21 is the diaphragm; 211 is the fixing part; 212 is the surround; 213 is the vibrating part; 214 is the dome; 22 is the voice coil; 221 is the voice coil body; 222 is the first recess; 3 is the magnetic circuit system; 31 is the main magnet; 311 is the main magnet body; 312 is the second recess; 32 is the auxiliary magnet; 321 is the auxiliary magnet body; 322 is the protrusion; 323 is the groove; 324 is the boss; and 33 is the main pole core. 34. Secondary pole core; 341. Relief groove; 35. Magnetic yoke; 351. Magnetic yoke body; 352. Relief groove; 353. Protrusion; 36. Magnetic gap; 4. Elastic support; 41. First connecting part; 42. Second connecting part; 43. Elastic part; 431. First elastic arm; 432. Second elastic arm; 433. Arc-shaped structure; 44. Adapter assembly; 441. Plastic seal; 442. Conductive connector; 45. Spring; 5. Sealing cap; 51. Sealing body; 52. Limiting part.

Detailed Implementation Methods

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] Example 1

[0042] Please see Figures 1-7 As shown, this utility model embodiment provides a sound generating device 100, which includes: a frame 1, a vibration system 2, and a magnetic circuit system 3.

[0043] The frame 1 is used to support and fix the vibration system 2 and the magnetic circuit system 3, providing support performance.

[0044] Vibration system 2, which includes a diaphragm 21 fixed to the frame 1 and a voice coil 22 for driving the diaphragm 21 to vibrate and produce sound.

[0045] The magnetic circuit system 3 includes a magnetic yoke 35 fixed to the side of the frame 1 away from the vibration system 2, a main magnet 31 stacked and fixed to the side of the magnetic yoke 35 near the diaphragm 21, and a secondary magnet 32 ​​stacked and fixed to the side of the magnetic yoke 35 near the diaphragm 21. The secondary magnet 32 ​​and the main magnet 31 are spaced apart to form a magnetic gap 36. The voice coil 22 is inserted into the magnetic gap 36. When the voice coil 22 is energized through the magnetic gap 36 formed by the main magnet 31 and the secondary magnet 32, it drives the diaphragm 21 to vibrate and produce sound, thereby improving the acoustic performance of the sound-producing device 100.

[0046] The sound-generating device 100 further includes an elastic support 4 located outside the voice coil 22. The elastic support 4 includes a first connecting portion 41, a second connecting portion 42, and an elastic portion 43 that elastically connects the first connecting portion 41 and the second connecting portion 42. The first connecting portion 41 and the second connecting portion 42 are respectively disposed on opposite sides of the auxiliary magnet 32 ​​along the vibration direction. The first connecting portion 41 is fixed to the side of the auxiliary magnet 32 ​​away from the diaphragm 21 along the vibration direction, and the second connecting portion 42 is fixed to the side of the diaphragm 21 near the magnetic circuit system 3 along the vibration direction and electrically connected to the voice coil 22. The elastic portion 43 has a U-shaped structure and is spaced apart from the auxiliary magnet 32. This allows the first connecting portion 41 and the second connecting portion 42 to open and close vertically during vibration of the sound-generating device 100. Compared to a planar structure, the stress received by the elastic portion 43 is significantly reduced, and the vibration life of the elastic support 4 is greatly improved. Meanwhile, the overall planar space occupied is significantly reduced, which can be used to increase the volume of other components and improve the acoustic performance of the product. In addition, placing the elastic support 4 on the outside of the voice coil 22 avoids the need for a three-dimensional elastic support 4 to pass through the magnetic circuit, reducing the manufacturing difficulty. Furthermore, the main magnet 31 contributes more to the performance than the auxiliary magnet 32. The design on the outside of the voice coil 22 makes full use of the outer space, while the main magnet 31, which contributes more, remains intact and has better performance. Optionally, the elastic support 4 can be an FPC circuit board, which has good conductivity and elastic recovery.

[0047] Optionally, the magnetic yoke 35 may also be provided with a perforation to facilitate the first connecting part 41 to be exposed outside the magnetic bowl 35 for welding with an external circuit to achieve electrical connection.

[0048] The device utilizes a three-dimensional elastic conductive element in conjunction with a single voice coil 22, with the elastic conductive element positioned on the outer side of the voice coil 22. Various materials and three-dimensional shapes of the elastic conductive element, along with corresponding shapes of the voice coil 22 and magnetic circuit structures, are all included.

[0049] In this embodiment, the U-shaped structure also includes V-shaped and C-shaped structures, but is not limited to these. As long as it is arc-shaped or similar to an arc shape, and thus has the function of elastically opening and closing up and down along the vibration direction, it is the U-shaped structure described in this embodiment. It connects the first connecting part 41 and the second connecting part 42, which are not on the same plane, and provides elastic support force.

[0050] In this embodiment, the voice coil 22 includes a rectangular voice coil body 221 and two first recesses 222 formed by recesses on opposite sides of the voice coil body 221 that move closer to each other. Optionally, the first recesses 222 are located along the long axis of the voice coil body 221.

[0051] The main magnet 31 includes a rectangular main magnet body 311 and two second recesses 312 formed by recesses on opposite sides of the main magnet body 311 moving closer to each other; the voice coil body 221 surrounds the outer periphery of the main magnet body 311, and the first recesses are disposed within the second recesses 312. The projection of the second connecting portion 42 along the vibration direction falls into the first recess 222. Optionally, the second recesses 312 are located along the long axis of the main magnet body 311.

[0052] In this embodiment, the auxiliary magnet 32 ​​includes a ring-shaped auxiliary magnet body 321 stacked and fixed to the magnetic yoke 35, and two protrusions 322 formed by the opposite sides of the auxiliary magnet body 321 protruding in a direction that approaches each other. The second connecting part 42 is arranged at intervals relative to the protrusions 322 along the vibration direction.

[0053] In this embodiment, the protrusion 322 is recessed on the side away from the voice coil 22 to form a groove 323. The auxiliary magnet body 321 and the two protrusions are respectively spaced apart from the main magnet body 311 and the two second recesses 312 to form the magnetic gap. The elastic part 43 includes a first elastic arm 431, a second elastic arm 432, and an arc-shaped structure 433 that fixes the first elastic arm 431 and the second elastic arm 432 together. The first elastic arm 431 is fixedly connected to the first connecting part, and the second elastic arm 432 is fixedly connected to the second connecting part. The arc-shaped structure 433 is disposed within the groove 323 and spaced apart from the magnetic circuit system 3. This allows the elastic support 4 to be positioned on the outside of the voice coil 22, avoiding the need for a three-dimensional elastic support 4 to pass through the magnetic circuit, thus reducing manufacturing difficulty. Furthermore, the main magnet 31 contributes more to the performance than the auxiliary magnet 32. The design on the outside of the voice coil 22 fully utilizes the outer space, allowing the higher-contributing main magnet 31 to remain intact and perform better. Optionally, two protrusions 322 are formed on the long axis of the secondary magnet body 321. Of course, in some configurations, the two protrusions 322 are formed on the short axis of the secondary magnet body 321, producing the same effect.

[0054] In this embodiment, the elastic support member 4 includes two members, and the two elastic portions 43 of the two elastic support members 4 are respectively disposed in the two grooves 323, and the opening directions of the two elastic portions 43 are arranged facing each other along the minor axis direction of the auxiliary magnet 32. The two elastic support members 4 can further enhance the elastic support capacity of the diaphragm 21, thereby increasing the service life of the elastic support members 4.

[0055] In this embodiment, the sound-generating device 100 further includes a ring-shaped secondary pole core 34. The secondary pole core 34 is stacked and fixed on the side of the secondary magnet 32 ​​near the diaphragm 21. The projection of the secondary pole core 34 along the vibration direction completely overlaps with the main magnet 31. The secondary pole core 34 is provided with a relief groove 341 that is recessed from the surface facing the diaphragm 21 away from the vibration direction. The relief groove 341 is spaced apart from the second elastic arm 432 along the vibration direction. This facilitates the installation space of the elastic part 43, and the secondary pole core 34 can also improve the magnetic field performance of the secondary magnet 32.

[0056] In this embodiment, the sound-generating device 100 further includes a main pole core 33, which is stacked and fixed on the side of the main magnet 31 near the diaphragm 21. The main pole core 33 guides the magnetic field of the main magnet 31, thereby facilitating the enhancement of the overall magnetic field strength of the main magnet 31.

[0057] In this embodiment, the magnetic yoke 35 includes a magnetic yoke body 351 fixed to the frame 1 and a clearance groove 352 formed through the magnetic yoke body 351, the clearance groove 352 communicating with the groove 323. The sound-generating device 100 also includes a sealing cover 5, the sealing cover 5 and the first connecting part 41 are respectively disposed in the clearance groove 352, and the sealing cover 5 is fixedly placed in the groove 323. This allows the sealing cover 5 to pass through the clearance groove 352 and be fixedly placed in the groove 323, sealing the groove 323 and providing overall protection. Simultaneously, a portion of the clearance groove 352 covers the groove 323, and the first connecting parts 41 are installed on both sides of the groove 323, facilitating the connection of the first connecting parts 41 to an external power source. Electrical signals are sequentially conducted to the second connecting part 42 through the first connecting part 41, the elastic part 43, and the second connecting part 42, facilitating the connection of the second connecting part 42 to the voice coil 22 to provide power.

[0058] In this embodiment, the sealing cover 5 includes a sealing body 51 and a limiting part 52 formed by bending and extending one end of the sealing body 51 away from the main magnet 31 toward the direction close to the diaphragm 21; the sealing body 51 is disposed in the clearance groove 352, and the limiting part 52 is fixed to the auxiliary magnet 32.

[0059] In this embodiment, the sound-generating device 100 further includes a boss 324 recessed on the side of the protrusion 322 away from the voice coil 22, the boss 324 being located within the groove 323; the limiting part 52 is disposed within the boss 324. This improves the installation and fixing effect of the limiting part 52, while further enhancing its sealing performance.

[0060] In this embodiment, the diaphragm 21 includes an annular folded ring 212, a fixing portion 211 extending from the outer periphery of the folded ring 212 toward the direction close to the frame 1, a vibrating portion 213 extending from the inner periphery of the folded ring 212 toward the direction away from the frame 1, and a dome 214 fixed to the vibrating portion 213 on the side close to the magnetic circuit system 3; the voice coil 22 is fixed to the dome 214 on the side close to the magnetic circuit system 3; and the second connecting portion 42 is fixed to the dome 214 on the side close to the magnetic circuit system 3.

[0061] Example 2

[0062] Please see Figures 8-10As shown, the structure of this embodiment 2 is basically the same as that of embodiment 1. The difference is that in this embodiment, the elastic support member 4 includes a spring piece 45 electrically connected to the voice coil 22 and an adapter assembly 44 electrically connected to the spring piece 45 and fixed to the auxiliary magnet 32 ​​on the side away from the diaphragm 21 along the vibration direction. The adapter assembly 44 includes a conductive connector 442 electrically connected to the spring piece 45 and a molding compound 441 injected into the conductive connector 442. The spring piece 45 includes a second connecting part 42, an elastic part 43, and a connecting end that electrically connects the elastic part 43 to the conductive connector 442. The connecting end and the adapter assembly 44 form the first connecting part 41.

[0063] In this embodiment, the molding compound 441 is fixed within the clearance groove 352, and the side of the molding compound 441 closest to the sealing cover 5 abuts against the sealing cover 5. By installing the molding compound 441 within the clearance groove 352 and then fixing the conductive connector 442 to the molding compound 441, signal interference is avoided caused by the conductive connector 442 contacting the magnetic yoke 35. The conductive connector 442 is connected to the first connecting portion of the elastic conductive member, facilitating its extension to an external power source for powering the voice coil 22.

[0064] In this embodiment, the magnetic yoke 35 further includes a protrusion 353 extending from the sidewall of the clearance groove 352 toward a closer side, and the molding compound 441 is integrally injection molded with the protrusion 353. This facilitates the filling of the clearance groove 352 by the molding compound 441, resulting in a good overall seal for the sound-generating device 100.

[0065] Compared with related technologies, the sound-generating device of this utility model has an elastic support located outside the voice coil. The elastic support includes a first connecting part, a second connecting part, and an elastic part that elastically connects the first connecting part and the second connecting part. The first connecting part and the second connecting part are respectively disposed on opposite sides of the auxiliary magnet along the vibration direction. The first connecting part is fixed to the side of the auxiliary magnet away from the diaphragm along the vibration direction, and the second connecting part is fixed to the side of the diaphragm close to the magnetic circuit system along the vibration direction and electrically connected to the voice coil. The elastic part has a U-shaped structure. The elastic part is spaced apart from the auxiliary magnet. This significantly reduces the stress received by the elastic part during vibration compared to a planar structure, and greatly improves the vibration life of the elastic support. At the same time, the overall planar space occupied is greatly reduced, which can be used to increase the volume of other components and improve the acoustic performance of the product. In addition, placing the elastic support outside the voice coil avoids the three-dimensional elastic support passing through the magnetic circuit, reducing the manufacturing difficulty. Furthermore, the main magnet contributes more to the performance than the auxiliary magnet. The design outside the voice coil makes full use of the outer space, and the main magnet, which contributes more, remains intact and has better performance.

[0066] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A sound-generating device, the sound-generating device comprising: Sink stand; A vibration system, the vibration system comprising a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound; as well as, A magnetic circuit system comprising a magnetic yoke fixed to the side of the frame away from the vibrating system, a main magnet stacked and fixed to the side of the magnetic yoke near the diaphragm, and a secondary magnet stacked and fixed to the side of the magnetic yoke near the diaphragm, wherein the secondary magnet and the main magnet are spaced apart to form a magnetic gap; the voice coil is inserted into the magnetic gap; characterized in that... The sound-generating device also includes an elastic support member located outside the voice coil; The elastic support includes a first connecting portion, a second connecting portion, and an elastic portion that elastically connects the first connecting portion and the second connecting portion; the first connecting portion and the second connecting portion are respectively disposed on opposite sides of the auxiliary magnet along the vibration direction, the first connecting portion is fixed to the side of the auxiliary magnet away from the diaphragm along the vibration direction, and the second connecting portion is fixed to the side of the diaphragm close to the magnetic circuit system along the vibration direction and is electrically connected to the voice coil; the elastic portion has a U-shaped structure and is spaced apart from the auxiliary magnet.

2. The sound-generating device according to claim 1, characterized in that, The voice coil includes a rectangular voice coil body and two first recesses formed by recesses on opposite sides of the voice coil body that move closer to each other. The main magnet includes a rectangular main magnet body and two second recesses formed by recesses on opposite sides of the main magnet body moving toward each other; the voice coil body surrounds the outer periphery of the main magnet body, and the first recess is disposed within the second recess; the projection of the second connecting portion along the vibration direction falls into the first recess.

3. The sound-generating device according to claim 2, characterized in that, The auxiliary magnet includes a ring-shaped auxiliary magnet body stacked and fixed to the magnetic yoke, and two protrusions formed by opposite sides of the auxiliary magnet body protruding towards each other. The second connecting part is arranged at intervals relative to the protrusions along the vibration direction.

4. The sound-generating device according to claim 3, characterized in that, The protrusion is recessed on the side away from the voice coil to form a groove; The elastic part includes a first elastic arm, a second elastic arm, and an arc-shaped structure that fixes the first elastic arm and the second elastic arm together; the first elastic arm is fixedly connected to the first connecting part, the second elastic arm is fixedly connected to the second connecting part, and the arc-shaped structure is disposed in the groove and spaced apart from the magnetic circuit system.

5. The sound-generating device according to claim 2, characterized in that, The elastic support includes two members, and the openings of the two elastic portions are arranged facing each other.

6. The sound-generating device according to claim 2, characterized in that, The sound-generating device also includes an annular sub-core, which is stacked and fixed on the side of the sub-magnet close to the diaphragm. The projection of the sub-core along the vibration direction completely overlaps with the main magnet. The sub-core is provided with a relief groove that is recessed from the surface facing the diaphragm away from the vibration direction. The relief groove is spaced apart from the second spring arm along the vibration direction.

7. The sound-generating device according to claim 2, characterized in that, The magnetic yoke includes a magnetic yoke body fixed to the basin frame and a clearance groove formed through the magnetic yoke body, the clearance groove communicating with the groove. The sound-generating device also includes a sealing cover, which is disposed in the clearance groove along with the first connecting part. The sealing cover is fixedly placed in the groove.

8. The sound-generating device according to claim 7, characterized in that, The sealing cover includes a sealing body and a limiting portion formed by bending and extending the sealing body from one end away from the main magnet toward the diaphragm; the sealing body is disposed in the clearance groove, and the limiting portion is fixed to the auxiliary magnet.

9. The sound-generating device according to claim 8, characterized in that, The sound-generating device further includes a boss recessed on the side of the protrusion away from the voice coil, the boss being located within the groove; the limiting portion is disposed within the boss.

10. The sound-generating device according to claim 9, characterized in that, The elastic support includes a spring sheet electrically connected to the voice coil and an adapter assembly electrically connected to the spring sheet and fixed to the auxiliary magnet on the side away from the diaphragm along the vibration direction. The adapter assembly includes a conductive connector electrically connected to the spring sheet and a plastic encapsulation part injection molded onto the conductive connector. The spring sheet includes a second connecting portion, the elastic portion, and a connecting end that electrically connects the elastic portion to the conductive connector. The connecting end and the adapter assembly form the first connecting portion.

11. The sound-generating device according to claim 10, characterized in that, The molding compound is fixed in the clearance groove, and the side of the molding compound near the sealing cap abuts against the sealing cap.

12. The sound-generating device according to claim 10, characterized in that, The magnetic yoke also includes a protrusion formed by the sidewall of the clearance groove extending toward each other, and the molding compound is integrally injection molded with the protrusion.

Images