Sound producing device

Abstract

The present application provides a sound producing device. The sound producing device comprises: a basket, the basket comprising a first basket and a second basket fixed to the first basket; a first vibration system, a second vibration system, a first clamping plate, and a second clamping plate, the second clamping plate comprising a ring-shaped second clamping plate body fixed to the second basket, a first connecting portion formed by bending and extending from one pair of opposite sides of the second clamping plate body in a direction away from a second diaphragm, a second connecting portion formed by bending and extending from the other pair of opposite sides of the second clamping plate body, and a supporting portion arranged parallel to the second clamping plate body and located on the side of the second clamping plate body close to a first diaphragm; and a magnetic circuit system, the magnetic circuit system comprising a first main magnet unit and a second main magnet unit arranged side by side and fixed to the side of the supporting portion away from the first diaphragm, a first side magnet, and a second side magnet. Compared with the related technology, a voice coil manufacturing process of the sound producing device of the present application is less difficult, and clamping plate safety thereof is higher.

Description

Sound generating device 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] A sound-generating device is a transducer that converts electrical signals into sound signals. It is mainly divided into two modes: single vibration system and dual vibration system. The dual vibration system mode of the sound-generating device mainly includes a frame, a clamp fixed to the frame, a first vibration system and a second vibration system fixed to the frame for emitting sound, and a magnetic circuit system for driving the first vibration system and the second vibration system to vibrate. The magnetic circuit system is fixed to the clamp. Technical issues

[0003] In related sound-generating devices, a first vibration system and a second vibration system are located on opposite sides of a magnetic circuit system. The first vibration system includes a first diaphragm fixed to the frame and a first voice coil that drives the diaphragm to vibrate. The second vibration system includes a second diaphragm fixed to the frame and a second voice coil that drives the diaphragm to vibrate. The first and second voice coils are suspended within the magnetic gap of the magnetic circuit system, and the two voice coils are driven by the magnetic circuit system to achieve dual vibration sound generation. However, when the aspect ratio of the sound-generating device is large, the manufacturing process of the inner second voice coil is difficult, resulting in difficulty in molding or large fluctuations in the molded dimensions. At the same time, the clamping plate has a connection point in only one direction. When the dimension in the direction without the connection point is large, the risk of deformation after mechanical testing is high.

[0004] Therefore, it is necessary to provide a new sound-generating device to solve the above problems. Technical solutions

[0005] The technical problem to be solved by this utility model is to provide a sound-generating device with a lower difficulty in voice coil manufacturing and a higher strength in clamping plate structure.

[0006] To solve the above-mentioned technical problems, this utility model provides a sound-generating device, the sound-generating device comprising:

[0007] A basin stand, the basin stand comprising a first basin stand and a second basin stand fixed to the first basin stand;

[0008] A first vibration system is fixed to the side of the first trough away from the second trough; the first vibration system includes a first diaphragm fixed to the first trough and a first voice coil that drives the first diaphragm to vibrate and produce sound.

[0009] The second vibration system is fixed to the side of the second frame away from the first frame; the second vibration system includes a second diaphragm fixed to the second frame, and a second voice coil and a third voice coil that jointly drive the second diaphragm to vibrate and produce sound.

[0010] A first clamping plate in the shape of a ring, the outer periphery of which is fixed to the first basin frame;

[0011] The second clamping plate includes an annular second clamping plate body fixed to the second diaphragm, a first connecting portion formed by bending and extending from opposite sides of the second clamping plate body in a direction away from the second diaphragm, a second connecting portion formed by bending and extending from the other opposite sides of the second clamping plate body in a direction away from the second diaphragm, and a support portion disposed parallel to the second clamping plate body and located on the side of the second clamping plate body closer to the first diaphragm; one end of the first connecting portion away from the second clamping plate body and one end of the second connecting portion away from the second clamping plate body are respectively fixed to the support portion; and

[0012] A magnetic circuit system includes a first main magnet unit and a second main magnet unit arranged side-by-side and fixed to the side of the support portion away from the first diaphragm; first side magnets fixed to the second clamping plate body along a direction parallel to the long axis of the magnetic circuit system and disposed on opposite sides of the first main magnet unit; and second side magnets fixed to the second clamping plate body along a direction parallel to the long axis of the magnetic circuit system and disposed on opposite sides of the second main magnet unit. The first side magnets and the second side magnets are respectively spaced apart from the first main magnet unit and the second main magnet unit to form magnetic gaps. The second voice coil and the third voice coil are respectively spaced apart within the first voice coil. The first voice coil, the second voice coil, and the third voice coil are respectively inserted into the magnetic gaps. The first side magnets and the second side magnets are respectively fixed to the first clamping plate.

[0013] Preferably, the second clamping plate body, the first connecting part, the second connecting part, and the supporting part are integrally formed.

[0014] Preferably, the second clamping plate body, the first connecting part, the second connecting part and the supporting part are integrally formed, and are fixedly connected to the second clamping plate body through the first connecting part and the second connecting part.

[0015] Preferably, the second clamping plate body has a first groove and a second groove respectively recessed on the side near the second diaphragm, the first groove is located on one of the opposite sides of the second clamping plate body, and the second groove is located on the other opposite sides of the second clamping plate body;

[0016] The first connecting portion includes a first connecting portion body fixed to the support portion and a first step formed by the first connecting portion body recessed in a direction away from the first diaphragm; the first step is disposed in the first groove;

[0017] The second connecting portion includes a second connecting portion body fixed to the support portion and a second step formed by the second connecting portion body recessed in a direction away from the first diaphragm; the second step is disposed in the second groove.

[0018] Preferably, the first diaphragm includes a first ring-shaped fold, a first fixing portion extending outward from the outer periphery of the first ring, a first vibrating portion extending inward from the inner periphery of the first ring, and a first dome fixed to the side of the first vibrating portion near the second vibration system; the first fixing portion is fixed to the side of the first frame away from the second vibration system, and the first voice coil is fixed to the side of the first dome near the second vibration system.

[0019] Preferably, the sound-generating device further includes a first circuit board, one end of which is fixed to the side of the first frame near the second frame, and the other end of which is fixed to the side of the first voice coil away from and near the second vibration system to achieve electrical connection.

[0020] Preferably, the second diaphragm includes a second ring-shaped fold, a second fixing portion extending outward from the outer periphery of the second ring, a second vibrating portion extending inward from the inner periphery of the second ring, and a second dome fixed to the side of the second vibrating portion away from the first vibration system; the second fixing portion is fixed to the side of the second frame away from the first vibration system, and the second voice coil and the third voice coil are respectively fixed to the side of the second fixing portion away from the second dome.

[0021] Preferably, the sound-generating device further includes a second circuit board, which is stacked and fixed on the side of the second frame away from the first vibration system; the second diaphragm is stacked and fixed on the side of the second circuit board away from the first frame; the second voice coil and the third voice coil are respectively fixed on the side of the second circuit board close to the first vibration system; and the second circuit board is electrically connected to the second voice coil and the third voice coil respectively.

[0022] Preferably, the first main magnet unit includes a first main magnet fixed to the support portion and a first pole core stacked and fixed on the side of the first main magnet away from the first vibration system; the second main magnet unit includes a second main magnet fixed to the support portion and a second pole core stacked and fixed on the side of the second main magnet away from the second vibration system; the first main magnet and the second main magnet respectively form the magnetic gap with the first side magnet and the second side magnet. Beneficial effects

[0023] Compared with the prior art, in the sound-generating device of this utility model, a first vibration system and a second vibration system are respectively installed on a first basin frame and a second basin frame. The second vibration system includes a second diaphragm fixed to the second basin frame, and a second voice coil and a third voice coil that jointly drive the second diaphragm to vibrate and generate sound. The outer periphery of the first clamping plate is fixed to the first basin frame. The second clamping plate includes a ring-shaped second clamping plate body fixed to the second basin frame, a first connecting portion formed by bending and extending from opposite sides of the second clamping plate body in a direction away from the second diaphragm, a second connecting portion formed by bending and extending from the other opposite sides of the second clamping plate body in a direction away from the second diaphragm, and a support portion disposed parallel to the second clamping plate body and located on the side of the second clamping plate body closer to the first diaphragm. The first connecting portion is away from the first diaphragm. One end of the second clamping plate body and the other end of the second connecting part away from the second clamping plate body are respectively fixed to the support part; the magnetic circuit system includes a first main magnet unit and a second main magnet unit arranged side by side and fixed to the side of the support part away from the first diaphragm, a first side magnet fixed to the second clamping plate body and arranged on opposite sides of the first main magnet unit along the long axis direction parallel to the magnetic circuit system, and a second side magnet fixed to the second clamping plate body and arranged on opposite sides of the second main magnet unit along the long axis direction parallel to the magnetic circuit system; by providing opposite first connecting parts and opposite second connecting parts in both the length and width directions of the second clamping plate, the manufacturing difficulty of the voice coil with a large length-to-width ratio and small product is reduced, greatly reducing the risk of deformation of the irregular upper clamping plate after mechanical experiments, the clamping plate is safer, and the application range is wider. Attached Figure Description

[0024] 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:

[0025] Figure 1 is a three-dimensional structural diagram of the sound-generating device provided in Embodiment 1 of this utility model;

[0026] Figure 2 is an exploded view of the sound-generating device provided in Embodiment 1 of this utility model;

[0027] Figure 3 is a cross-sectional view along line AA in Figure 1;

[0028] Figure 4 is a cross-sectional view along line BB in Figure 1;

[0029] Figure 5 is a schematic diagram of the structure of the second clamping plate of the sound-generating device provided in Embodiment 1 of this utility model;

[0030] Figure 6 is a schematic diagram of the structure of the second clamping plate of the sound-generating device provided in Embodiment 2 of this utility model;

[0031] Figure 7 is a schematic diagram of the decomposition of Figure 6;

[0032] Figure 8 is a schematic diagram of the structure of the second clamping plate of the sound-generating device provided in Embodiment 3 of this utility model;

[0033] Figure 9 is a schematic diagram of the decomposition of Figure 8.

[0034] In the diagram, 100 is the sound-generating device; 1 is the basin frame; 11 is the first basin frame; 12 is the second basin frame; 2 is the second clamping plate; 21 is the body of the second clamping plate; 211 is the first groove; 212 is the second groove; 22 is the first connecting part; 221 is the body of the first connecting part; 222 is the first step; 23 is the second connecting part; 231 is the body of the second connecting part; 232 is the second step; 24 is the support part; 3 is the first vibration system; 31 is the first diaphragm; 311 is the first fixing part; 312 is the first folding ring; 313 is the first vibrating part; 314 is the first dome. 2. First voice coil; 4. Second vibration system; 41. Second diaphragm; 411. Second fixing part; 412. Second surround; 413. Second vibration part; 414. Second dome; 42. Second voice coil; 43. Third voice coil; 5. Magnetic circuit system; 51. Magnetic gap; 52. First main magnet unit; 521. First main magnet; 522. First pole core; 53. Second main magnet unit; 531. Second main magnet; 532. Second pole core; 54. First side magnet; 55. Second side magnet; 6. Second circuit board; 7. First circuit board; 8. First clamping plate. Embodiments of the present invention

[0035] 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.

[0036] Example 1

[0037] Please refer to Figures 1-5. This embodiment of the present invention provides a sound-generating device 100, which includes: a frame 1, a first vibration system 3, a second vibration system 4, and a magnetic circuit system 5.

[0038] The basin stand 1 includes a first basin stand 11 and a second basin stand 12 fixed to the first basin stand 11. Optionally, the first basin stand 11 and the second basin stand 12 are integrally formed. Of course, the first basin stand 11 and the second basin stand 12 are separately configured to facilitate the assembly of the first basin stand 11 and the second basin stand 12 in the sound-generating device.

[0039] The first basin stand 11 is used to install and fix the first vibration system 3. The second basin stand 12 is stacked and fixed to the first basin stand 11.

[0040] The first vibration system 3 is fixed to the side of the first diaphragm 11 away from the second diaphragm 12; the first vibration system 3 includes a first diaphragm 31 fixed to the first diaphragm 11 and a first voice coil 32 that drives the first diaphragm 31 to vibrate and produce sound.

[0041] The second vibration system 4 is fixed to the side of the second frame 12 away from the first frame 11. The second vibration system 4 includes a second diaphragm 41 fixed to the second frame 12, and a second voice coil 42 and a third voice coil 43 that jointly drive the second diaphragm 41 to vibrate and produce sound. The second vibration system 4 achieves dual-drive sound production through the second voice coil 42 and the third voice coil 43, and has good vibration performance.

[0042] In this embodiment, the sound-generating device 100 further includes a first annular clamping plate 8, the outer periphery of which is fixed to the first basin frame 11.

[0043] The second clamping plate 2 includes a ring-shaped second clamping plate body 21 fixed to the second frame 12, a first connecting portion 22 formed by bending and extending from one of the opposite sides of the second clamping plate body 21 in a direction away from the second diaphragm 41, a second connecting portion 23 formed by bending and extending from the other opposite sides of the second clamping plate body 21 in a direction away from the second diaphragm 41, and a support portion 24 disposed parallel to the second clamping plate body 21 and located on the side of the second clamping plate body 21 close to the first diaphragm 31; the end of the first connecting portion 22 away from the second clamping plate body 21 and the end of the second connecting portion 23 away from the second clamping plate body 21 are respectively fixed to the support portion 24. By providing opposite first connecting portions 22 and opposite second connecting portions 23 in both the length and width directions of the second clamping plate 2, the manufacturing process of small voice coils for products with large length-to-width ratios is made easier, greatly reducing the risk of deformation of the irregularly shaped second clamping plate 2 after mechanical experiments, making the second clamping plate 2 safer and more widely applicable. The second clamping plate 2 is fixed to the second basin frame 12 by injection molding. The material of the second clamping plate 2 is SPCC material, which has high structural strength.

[0044] Optionally, the second clamping plate 2 is fixed to the inner circumference of the second basin frame 12. Two first connecting portions 22 are provided on opposite sides of the long axis of the second clamping plate body 21. Two second connecting portions 23 are provided on opposite sides of the short axis of the second clamping plate body 21.

[0045] The magnetic circuit system 5 is fixed to the second clamping plate 2. The magnetic circuit system 5 includes a first main magnet unit 52 and a second main magnet unit 53 arranged side by side and fixed to the side of the support 24 away from the first diaphragm 31; a first side magnet 54 fixed to the second clamping plate body 21 along a direction parallel to the long axis of the magnetic circuit system 5 and disposed on opposite sides of the first main magnet unit 52; and a second side magnet 55 fixed to the second clamping plate body 21 along a direction parallel to the long axis of the magnetic circuit system 5 and disposed on opposite sides of the second main magnet unit 53. The first side magnet 54 and the second side magnet 55 are respectively spaced apart from the first main magnet unit 52 and the second main magnet unit 53 to form a magnetic gap 51. The second voice coil 42 and the third voice coil 43 are respectively spaced apart within the first voice coil 31, and the first voice coil 32, the second voice coil 42, and the third voice coil 43 are respectively inserted into the magnetic gap 51. The first side magnet 54 and the second side magnet 55 are respectively fixed to the first clamping plate 8. The second voice coil 42 and the third voice coil 43 are respectively located at intervals inside the first voice coil 32. The first main magnet unit 52 and the second main magnet unit 53 are fixed at intervals on the side of the support portion 24 away from the first diaphragm 31; the first side magnet 54 and the second side magnet 55 are respectively fixed on the side of the second clamping plate body 21 away from the first diaphragm 31. The first main magnet unit 52 and the second main magnet unit 53 generate magnetic fields with the first side magnet 54 and the second side magnet 55 respectively, which are used to drive the first voice coil 32, the second voice coil 42 and the third voice coil 43 to vibrate and produce sound.

[0046] Optionally, when the first basin frame 11 and the first clamping plate 8 are both on the same plane near the side of the second diaphragm 41, the first side magnet 54 is fixed to the first basin frame 11 and the first clamping plate 8 respectively; the second side magnet 55 is fixed to the first basin frame 11 and the first clamping plate 8 respectively. This improves the fixing effect of the first side magnet 54 and the second side magnet 55.

[0047] In this embodiment, the second clamping plate body 21, the first connecting portion 22, the second connecting portion 23, and the supporting portion 24 are integrally formed. This integral structure is easy to form and has high structural strength, reducing the risk of deformation of the second clamping plate 2 after mechanical testing. Furthermore, the integral structure is formed by stamping and injection molding, ensuring that the first connecting portion 22 and the second connecting portion 23 are perpendicular to the second clamping plate body 21, and the supporting portion 24 is parallel to the second clamping plate body 21. This results in good forming performance for both the supporting portion 24 and the second clamping plate body 21.

[0048] In this embodiment, the first diaphragm 31 includes a first ring-shaped fold 312, a first fixing portion 311 extending outward from the outer periphery of the first ring 312, a first vibrating portion 313 extending inward from the inner periphery of the first ring 312, and a first dome 314 fixed to the side of the first vibrating portion 313 near the second vibration system 4; the first fixing portion 311 is fixed to the side of the first frame 11 away from the second vibration system 4, and the first voice coil 32 is fixed to the side of the first dome 314 near the second vibration system 4.

[0049] In this embodiment, the second diaphragm 41 includes a second ring 412 in the shape of an annular shape, a second fixing part 411 extending outward from the outer periphery of the second ring 412, a second vibrating part 413 extending inward from the inner periphery of the second ring 412, and a second dome 414 fixed to the side of the second vibrating part 413 away from the first vibration system 3; the second fixing part 411 is fixed to the side of the second frame 12 away from the first vibration system 3, and the second voice coil 42 and the third voice coil 43 are respectively fixed to the side of the second fixing part 411 away from the second dome 414.

[0050] In this embodiment, the sound-generating device 100 further includes a first circuit board 7. One end of the first circuit board 7 is fixed to the side of the first frame 11 near the second frame 12, and the other end of the first circuit board 7 is fixed to the side of the first voice coil 32 away from and near the second vibration system 4 to achieve electrical connection. The first circuit board 7 can be an FPC board for conductive connection. Two first circuit boards 7 are included, respectively disposed at opposite ends of the first voice coil 32, which can increase the vibration intensity of the first diaphragm 31 to improve sound loudness and sensitivity; prevent lateral oscillation when the first voice coil 32 vibrates, and improve reliability.

[0051] In this embodiment, the sound-generating device 100 further includes a second circuit board 6, which is stacked and fixed on the side of the second frame 12 away from the first vibration system 3. The second diaphragm 41 is stacked and fixed on the side of the second circuit board 6 away from the first frame 11. The second voice coil 42 and the third voice coil 43 are respectively fixed on the side of the second circuit board 6 close to the first vibration system 3. The second circuit board 6 is electrically connected to the second voice coil 42 and the third voice coil 43. The end of the second circuit board 6 away from the second frame 12 is used to connect to an external power source. By connecting to an external power source, power is provided to the second voice coil 42 and the third voice coil 43, causing them to drive the second diaphragm 41 to vibrate and produce sound. The use of a dual voice coil configuration ensures good vibration performance of the second diaphragm 41. Optionally, the second circuit board 6 is an FPC board.

[0052] In this embodiment, the first main magnet unit 52 includes a first main magnet 521 fixed to the support portion 24 and a first pole core 522 stacked and fixed to the side of the first main magnet 521 away from the first vibration system 3; the second main magnet unit 53 includes a second main magnet 531 fixed to the support portion 24 and a second pole core 532 stacked and fixed to the side of the second main magnet 531 away from the second vibration system 4; the first main magnet 521 and the second main magnet 531 respectively form the magnetic gap 51 with the first side magnet 54 and the second side magnet 55.

[0053] Example 2

[0054] Please refer to Figures 1-7. The structure of this second embodiment is basically the same as that of the first embodiment. The difference lies in that, in this embodiment, the first connecting part 22, the second connecting part 23, and the supporting part 24 are integrally formed and are fixedly connected to the second clamping plate body 21 through the first connecting part 22 and the second connecting part 23. This achieves a split structure, allowing the structural size and shape of the supporting part 24 to be arbitrarily adjusted, facilitating flexible design and broad applicability.

[0055] Example 3

[0056] Please refer to Figures 8 and 9. The structure of this embodiment 3 is basically the same as that of embodiment 2. The difference is that in this embodiment, the second clamping plate body 21 is recessed on the side near the second diaphragm 41 to form a first groove 211 and a second groove 212. The first groove 211 is located on one of the opposite sides of the second clamping plate body 21, and the second groove 212 is located on the other opposite sides of the second clamping plate body 21.

[0057] The first connecting portion 22 includes a first connecting portion body 221 fixed to the support portion 24 and a first step 222 formed by recessing the first connecting portion body 221 in a direction away from the first diaphragm 31; the first step 222 is disposed within the first groove 211. The second connecting portion 23 includes a second connecting portion body 231 fixed to the support portion 24 and a second step 232 formed by recessing the second connecting portion body 231 in a direction away from the first diaphragm 31; the second step 232 is disposed within the second groove 212. The first step 222 and the first groove 211 cooperate, and the second step 232 and the second groove 212 cooperate, making it convenient to install and fix the first connecting portion 22 and the second connecting portion 23 to the second clamping plate body 21, saving assembly space.

[0058] Optionally, two of each of the first groove 211 and the second groove 212 are provided. The first groove 211 is located along the long axis of the second clamping plate body 21, and the second groove 212 is located along the short axis of the second clamping plate body 21. Two of each of the first step 222 and the second step 232 are also provided. The first step 222 and the second step 232 are respectively engaged and fixed with the first groove 211 and the second groove 212.

[0059] Compared with related technologies, in the sound-generating device of this utility model, a first vibration system and a second vibration system are respectively installed on a first basin frame and a second basin frame. The second vibration system includes a second diaphragm fixed to the second basin frame, and a second voice coil and a third voice coil that jointly drive the second diaphragm to vibrate and generate sound. The outer periphery of the first clamping plate is fixed to the first basin frame. The second clamping plate includes a ring-shaped second clamping plate body fixed to the second basin frame, a first connecting portion formed by bending and extending from opposite sides of the second clamping plate body in a direction away from the second diaphragm, a second connecting portion formed by bending and extending from the other opposite sides of the second clamping plate body in a direction away from the second diaphragm, and a support portion disposed parallel to the second clamping plate body and located on the side of the second clamping plate body closer to the first diaphragm. The first connecting portion is away from the first diaphragm. One end of the second clamping plate body and the other end of the second connecting part away from the second clamping plate body are respectively fixed to the support part; the magnetic circuit system includes a first main magnet unit and a second main magnet unit arranged side by side and fixed to the side of the support part away from the first diaphragm, a first side magnet fixed to the second clamping plate body and arranged on opposite sides of the first main magnet unit along the long axis direction parallel to the magnetic circuit system, and a second side magnet fixed to the second clamping plate body and arranged on opposite sides of the second main magnet unit along the long axis direction parallel to the magnetic circuit system; by providing opposite first connecting parts and opposite second connecting parts in both the length and width directions of the second clamping plate, the manufacturing difficulty of the voice coil with a large length-to-width ratio and small product is reduced, greatly reducing the risk of deformation of the irregular upper clamping plate after mechanical experiments, the clamping plate is safer, and the application range is wider.

[0060] 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 producing device, characterized by, The sound-generating device includes: A basin stand, the basin stand comprising a first basin stand and a second basin stand fixed to the first basin stand; A first vibration system is fixed to the side of the first trough away from the second trough; the first vibration system includes a first diaphragm fixed to the first trough and a first voice coil that drives the first diaphragm to vibrate and produce sound. The second vibration system is fixed to the side of the second frame away from the first frame; the second vibration system includes a second diaphragm fixed to the second frame, and a second voice coil and a third voice coil that jointly drive the second diaphragm to vibrate and produce sound. A first clamping plate in the shape of a ring, the outer periphery of which is fixed to the first basin frame; The second clamping plate includes an annular second clamping plate body fixed to the second diaphragm, a first connecting portion formed by bending and extending from opposite sides of the second clamping plate body in a direction away from the second diaphragm, a second connecting portion formed by bending and extending from the other opposite sides of the second clamping plate body in a direction away from the second diaphragm, and a support portion disposed parallel to the second clamping plate body and located on the side of the second clamping plate body closer to the first diaphragm; one end of the first connecting portion away from the second clamping plate body and one end of the second connecting portion away from the second clamping plate body are respectively fixed to the support portion; and A magnetic circuit system includes a first main magnet unit and a second main magnet unit arranged side-by-side and fixed to the side of the support portion away from the first diaphragm; first side magnets fixed to the second clamping plate body along a direction parallel to the long axis of the magnetic circuit system and disposed on opposite sides of the first main magnet unit; and second side magnets fixed to the second clamping plate body along a direction parallel to the long axis of the magnetic circuit system and disposed on opposite sides of the second main magnet unit. The first side magnets and the second side magnets are respectively spaced apart from the first main magnet unit and the second main magnet unit to form magnetic gaps. The second voice coil and the third voice coil are respectively spaced apart within the first voice coil. The first voice coil, the second voice coil, and the third voice coil are respectively inserted into the magnetic gaps. The first side magnets and the second side magnets are respectively fixed to the first clamping plate.

2. The sound-generating device according to claim 1, characterized in that, The second clamping plate body, the first connecting part, the second connecting part and the supporting part are integrally formed.

3. The sound-generating device according to claim 1, characterized in that, The first connecting part, the second connecting part, and the supporting part are integrally formed and are fixedly connected to the second clamping plate body through the first connecting part and the second connecting part.

4. The sound-generating device according to claim 3, characterized in that, The second clamping plate body has a first groove and a second groove respectively recessed on one side near the second diaphragm. The first groove is located on one opposite side of the second clamping plate body, and the second groove is located on the other opposite side of the second clamping plate body. The first connecting portion includes a first connecting portion body fixed to the support portion and a first step formed by the first connecting portion body recessed in a direction away from the first diaphragm; the first step is disposed in the first groove; The second connecting portion includes a second connecting portion body fixed to the support portion and a second step formed by the second connecting portion body recessed in a direction away from the first diaphragm; the second step is disposed in the second groove.

5. The sound-generating device according to claim 1, characterized in that, The first diaphragm includes a first ring-shaped fold, a first fixing portion extending outward from the outer periphery of the first ring, a first vibrating portion extending inward from the inner periphery of the first ring, and a first dome fixed to the side of the first vibrating portion near the second vibration system; the first fixing portion is fixed to the side of the first frame away from the second vibration system, and the first voice coil is fixed to the side of the first dome near the second vibration system.

6. The sound-generating device according to claim 1, characterized in that, The sound-generating device also includes a first circuit board, one end of which is fixed to the side of the first frame near the second frame, and the other end of which is fixed to the side of the first voice coil away from the side near the second vibration system to achieve electrical connection.

7. The sound-generating device according to claim 1, characterized in that, The second diaphragm includes a second ring-shaped fold, a second fixing portion extending outward from the outer periphery of the second ring, a second vibrating portion extending inward from the inner periphery of the second ring, and a second dome fixed to the side of the second vibrating portion away from the first vibration system; the second fixing portion is fixed to the side of the second frame away from the first vibration system, and the second voice coil and the third voice coil are respectively fixed to the side of the second fixing portion away from the second dome.

8. The sound-generating device according to claim 7, characterized in that, The sound-generating device further includes a second circuit board, which is stacked and fixed on the side of the second frame away from the first vibration system; the second diaphragm is stacked and fixed on the side of the second circuit board away from the first frame; the second voice coil and the third voice coil are respectively fixed on the side of the second circuit board close to the first vibration system; and the second circuit board is electrically connected to the second voice coil and the third voice coil respectively.

9. The sound-generating device according to claim 1, characterized in that, The first main magnet unit includes a first main magnet fixed to the support portion and a first pole core stacked and fixed to the side of the first main magnet away from the first vibration system; The second main magnet unit includes a second main magnet fixed to the support and a second pole core stacked and fixed to the side of the second main magnet away from the second vibration system; The first main magnet and the second main magnet form the magnetic gap with the first side magnet and the second side magnet, respectively.

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