Sounding device

Abstract

The utility model provides a sounding device, which comprises a basin frame, a sound generating device, a sound generating device, a sound generating device, a sound generating device and a sound generating device, and is characterized in that the basin frame comprises a first basin frame and a second basin frame; a first vibration system, a second vibration system, a first clamping plate and a second clamping plate, the second clamping plate comprises an annular second clamping plate body fixed on the second basin frame, a first connecting part formed by bending and extending two opposite sides of the second clamping plate body in a direction far away from the second vibrating diaphragm, and a second connecting part formed by bending and extending the other two opposite sides of the second clamping plate body. The supporting part is parallel to the second clamping plate body and is positioned on one side, close to the first vibrating diaphragm, of the second clamping plate body; and a magnetic circuit system, the magnetic circuit system comprises a first main magnetic steel unit, a second main magnetic steel unit, a first side magnet and a second side magnet, wherein the first main magnetic steel unit and the second main magnetic steel unit are arranged side by side and fixed on one side, away from the first vibrating diaphragm, of the supporting part. Compared with the prior art, the sound production device provided by the utility model is lower in voice coil manufacturing difficulty and higher in clamping plate safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroacoustic conversion technical field especially relates to a sound production device. BACKGROUND

[0002] The sound production device is a transducer device for converting electrical signals into acoustic signals, mainly divided into single vibration system and double vibration system two modes, wherein, the sound production device of double vibration system mode mainly includes the frame, the clamping plate fixed in the frame, the first vibration system fixed in the frame for emitting sound, the second vibration system and the magnetic circuit system for driving the first vibration system and the second vibration system vibration, the magnetic circuit system is fixed on the clamping plate.

[0003] In the sound production device of the related art, the first vibration system and the second vibration system are respectively located on the opposite sides of the magnetic circuit system, the first vibration system includes the first diaphragm fixed to the frame and the first voice coil for driving the diaphragm to vibrate, and the second vibration system includes the second diaphragm fixed to the frame and the second voice coil for driving the diaphragm to vibrate, the first voice coil and the second voice coil are suspended in the magnetic gap of the magnetic circuit system, and the double vibration sound production is realized by driving the two voice coils through the magnetic circuit system. However, when the product of the sound production device has a large length-width ratio, the second voice coil on the inner side has a large process difficulty, is difficult to form or has a large forming size fluctuation; at the same time, the clamping plate has a connection point in only one direction, and when the size in the direction without the connection point is large, the deformation risk is high after the mechanical experiment.

[0004] Therefore, it is necessary to provide a new sound production device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model wants to solve the technical problem to provide a sound production device that the voice coil process difficulty is lower, and the clamping plate structure strength is higher.

[0006] To solve the above technical problem, the utility model embodiment provides a sound production device, the sound production device includes:

[0007] The frame includes a first frame and a second frame fixed to the first frame;

[0008] The first vibration system is fixed to the side of the first frame away from the second frame; the first vibration system includes a first diaphragm fixed to the first frame and a first voice coil for driving 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 for jointly driving the second diaphragm to vibrate and produce sound;

[0010] a first clamping plate in a ring shape, an outer periphery of the first clamping plate is fixed to the first yoke;

[0011] a second clamping plate, the second clamping plate comprises a second clamping plate body in a ring shape fixed to the second yoke, a first connecting part formed by bending and extending from opposite two sides of the second clamping plate body to a direction away from the second diaphragm, a second connecting part formed by bending and extending from other opposite two sides of the second clamping plate body to a direction away from the second diaphragm, and a support part arranged parallel to the second clamping plate body and located on a side of the second clamping plate body close to the first diaphragm; one end of the first connecting part away from the second clamping plate body and one end of the second connecting part away from the second clamping plate body are respectively fixed to the support part; and

[0012] a magnetic circuit system, the magnetic circuit system comprises a first main magnetic unit and a second main magnetic unit arranged side by side and fixed to a side of the support part away from the first diaphragm, a first side magnetic fixed to the second clamping plate body along a direction parallel to a long axis of the magnetic circuit system and arranged on opposite two sides of the first main magnetic unit, and a second side magnetic fixed to the second clamping plate body along a direction parallel to the long axis of the magnetic circuit system and arranged on opposite two sides of the second main magnetic unit; the first side magnetic and the second side magnetic are arranged spaced apart from the first main magnetic unit and the second main magnetic unit to form a magnetic gap, the second voice coil and the third voice coil are arranged spaced apart in the first voice coil, the first voice coil, the second voice coil and the third voice coil are respectively inserted into the magnetic gap; the first side magnetic and the second side magnetic 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 support part are integrally formed.

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

[0015] Preferably, a side of the second clamping plate body close to the second diaphragm is respectively recessed to form a first recess and a second recess, the first recess is located on opposite two sides of the second clamping plate body, and the second recess is located on other opposite two sides of the second clamping plate body;

[0016] The first connecting part comprises a first connecting part body fixed to the support part and a first step recessed from the first connecting part body to a direction away from the first diaphragm; the first step is arranged in the first recess;

[0017] The second connecting part comprises a second connecting part body fixed to the supporting part and a second step formed by recessing the second connecting part body away from the first diaphragm; the second step is arranged in the second groove.

[0018] Preferably, the first diaphragm comprises a first folded ring in a ring shape, a first fixed part formed by extending outward from the outer periphery of the first folded ring, a first vibration part formed by extending inward from the inner periphery of the first folded ring, and a first ball top fixed to the side of the first vibration part close to the second vibration system; the first fixed part is fixed to the side of the first yoke away from the second vibration system, and the first voice coil is fixed to the side of the first ball top close to the second vibration system.

[0019] Preferably, the sound generating device further comprises a first circuit board, one end of the first circuit board is fixed to the side of the first yoke close to the second yoke, and the other end of the first circuit board is fixed to the side of the first voice coil away from the side close to the second vibration system to realize electrical connection.

[0020] Preferably, the second diaphragm comprises a second folded ring in a ring shape, a second fixed part formed by extending outward from the outer periphery of the second folded ring, a second vibration part formed by extending inward from the inner periphery of the second folded ring, and a second ball top fixed to the side of the second vibration part away from the first vibration system; the second fixed part is fixed to the side of the second yoke 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 fixed part away from the second ball top.

[0021] Preferably, the sound generating device further comprises a second circuit board, the second circuit board is fixed to the side of the second yoke away from the first vibration system in a stacked manner; the second diaphragm is fixed to the side of the second circuit board away from the first yoke in a stacked manner, the second voice coil and the third voice coil are respectively fixed to the side of the second circuit board close to the first vibration system, and the second circuit board is electrically connected with the second voice coil and the third voice coil respectively.

[0022] Preferably, the first main magnetic steel unit comprises a first main magnetic steel fixed to the supporting part and a first pole core fixed to the side of the first main magnetic steel away from the first vibration system in a stacked manner; the second main magnetic steel unit comprises a second main magnetic steel fixed to the supporting part and a second pole core fixed to the side of the second main magnetic steel away from the second vibration system in a stacked manner; the first main magnetic steel and the second main magnetic steel form the magnetic gap with the first side magnet and the second side magnet respectively.

[0023] Compared with the related art, in the sound generating device, the first vibration system and the second vibration system are respectively installed on the first basket and the second basket, the second vibration system comprises a second diaphragm fixed to the second basket, and a second voice coil and a third voice coil for driving the second diaphragm to vibrate and generate sound; the outer periphery of the first clamping plate is fixed to the first basket; the second clamping plate comprises a second clamping plate body in the form of a ring fixed to the second basket, a first connecting portion formed by bending and extending from two opposite sides of the second clamping plate body away from the second diaphragm, a second connecting portion formed by bending and extending from the other two opposite sides of the second clamping plate body away from the second diaphragm, and a support portion arranged parallel to the second clamping plate body and located on the side of the second clamping plate body close 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; the magnetic circuit system comprises a first main magnetic unit and a second main magnetic unit arranged side by side and fixed to the side of the support portion away from the first diaphragm, a first side magnet fixed to the second clamping plate body on the opposite sides of the first main magnetic unit in the direction parallel to the long axis of the magnetic circuit system, and a second side magnet fixed to the second clamping plate body on the opposite sides of the second main magnetic unit in the direction parallel to the long axis of the magnetic circuit system; by arranging the opposite first connecting portion and the opposite second connecting portion in the length and width directions of the second clamping plate, the process difficulty of the voice coil of the product with a larger length-width ratio is lower, the risk of deformation of the special-shaped upper clamping plate after the mechanical experiment is greatly reduced, the safety of the clamping plate is higher, and the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 The three-dimensional structure schematic diagram of the sound generating device provided by the first embodiment of the present application;

[0026] Figure 2 The exploded schematic diagram of the sound generating device provided by the first embodiment of the present application;

[0027] Figure 3 The cross-sectional view along the line A-A in the first embodiment of the present application; Figure 1

[0028] The cross-sectional view along the line B-B in the first embodiment of the present application; Figure 4 Figure 1

[0029] Figure 5 ​​The utility model provides a structure schematic drawing of the second clamping plate of the sound production device of the first embodiment of the utility model;

[0030] Figure 6 The utility model provides a structure schematic drawing of the second clamping plate of the sound production device of the second embodiment of the utility model;

[0031] Figure 7 For Figure 6 The exploded view of schematic diagram of

[0032] Figure 8 The utility model provides a structure schematic drawing of the second clamping plate of the sound production device of the third embodiment of the utility model;

[0033] Figure 9 For Figure 8 The exploded view of schematic diagram of

[0034] In the figure, 100, sound production device, 1, basin frame, 11, first basin frame, 12, second basin frame, 2, second clamping plate, 21, second clamping plate body, 211, first recess, 212, second recess, 22, first connecting portion, 221, first connecting portion body, 222, first step, 23, second connecting portion, 231, second connecting portion body, 232, second step, 24, support portion, 3, first vibration system, 31, first diaphragm, 311, first fixed part, 312, first folded ring, 313, first vibration part, 314, first ball top, 32, first voice coil, 4, second vibration system, 41, second diaphragm, 411, second fixed part, 412, second folded ring, 413, second vibration part, 414, second ball top, 42, second voice coil, 43, third voice coil, 5, magnetic circuit system, 51, magnetic gap, 52, first main magnetic steel unit, 521, first main magnetic steel, 522, first pole core, 53, second main magnetic steel unit, 531, second main magnetic steel, 532, second pole core, 54, first side magnetic, 55, second side magnetic, 6, second circuit board, 7, first circuit board, 8, first clamping plate.

DETAILED DESCRIPTION

[0035] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0036] Embodiment one

[0037] Please refer to Figures 1-5As shown, the utility model embodiment provides a sound production device 100, sound production device 100 includes: basin frame 1, first vibration system 3, second vibration system 4 and magnetic circuit system 5.

[0038] The basin frame 1 includes a first basin frame 11 and a second basin frame 12 fixed to the first basin frame 11. Optionally, the first basin frame 11 and the second basin frame 12 are integrally formed. Of course, the first basin frame 11 and the second basin frame 12 are provided in a split structure, facilitating the assembly of the first basin frame 11 and the second basin frame 12 in the sound production device.

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

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

[0041] The second vibration system 4 is fixed to the side of the second basin frame 12 away from the first basin frame 11; the second vibration system 4 includes a second diaphragm 41 fixed to the second basin frame 12, and a second voice coil 42 and a third voice coil 43 jointly driving the second diaphragm 41 to vibrate and produce sound. The second vibration system 4 realizes double-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 production device 100 further includes a first clamping plate 8 in the form of a ring, and the outer periphery of the first clamping plate 8 is fixed to the first basin frame 11.

[0043] The second clamping plate 2 comprises a ring-shaped second clamping plate body 21 fixed to the second yoke 12, a first connecting portion 22 formed by bending and extending two opposite sides of the second clamping plate body 21 away from the second diaphragm 41, a second connecting portion 23 formed by bending and extending the other two opposite sides of the second clamping plate body 21 away from the second diaphragm 41, and a support portion 24 arranged 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; one end of the first connecting portion 22 away from the second clamping plate body 21 and one end of the second connecting portion 23 away from the second clamping plate body 21 are respectively fixed to the support portion 24. By arranging the opposite first connecting portion 22 and the opposite second connecting portion 23 in the length and width directions of the second clamping plate 2, the process difficulty of the small voice coil of the product with a large length-width ratio is lower, the risk of deformation of the second clamping plate 2 after the mechanical experiment is greatly reduced, the safety of the second clamping plate 2 is higher, and the application range is wider. The second clamping plate 2 is fixed to the second yoke 12 by injection molding, and 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 circumferential side of the second yoke 12. The first connecting portion 22 comprises two, and the two first connecting portions 22 are arranged on the opposite sides of the long axis of the second clamping plate body 21. The second connecting portion 23 comprises two, and the two second connecting portions 23 are arranged on the 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 magnetic unit 52 and a second main magnetic unit 53 arranged side by side and fixed to one side of the support portion 24 away from the first diaphragm 31, a first side magnet 54 fixed to the second clamping plate body 21 respectively and arranged on opposite sides of the first main magnetic unit 52 in a direction parallel to the long axis of the magnetic circuit system 5, and a second side magnet 55 fixed to the second clamping plate body 21 respectively and arranged on opposite sides of the second main magnetic unit 53 in a direction parallel to the long axis of the magnetic circuit system 5; the first side magnet 54 and the second side magnet 55 are arranged with a magnetic gap 51 between the first main magnetic unit 52 and the second main magnetic unit 53 respectively, and the second voice coil 42 and the third voice coil 43 are arranged with a gap in the first voice coil 31 respectively, and the first voice coil 32, the second voice coil 42 and the third voice coil 43 are inserted into the magnetic gap 51 respectively. The first side magnet 54 and the second side magnet 55 are fixed to the first clamping plate 8 respectively. The second voice coil 42 and the third voice coil 43 are arranged with a gap on the inner side of the first voice coil 32 respectively. The first main magnetic unit 52 and the second main magnetic unit 53 are fixed to one side of the support portion 24 away from the first diaphragm 31 respectively; the first side magnet 54 and the second side magnet 55 are fixed to one side of the second clamping plate body 21 away from the first diaphragm 31 respectively. The first main magnetic unit 52 and the second main magnetic unit 53 generate a magnetic field with the first side magnet 54 and the second side magnet 55 respectively, for driving 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 yoke 11 and the first clamping plate 8 are on the same plane near the side of the second diaphragm 41, the first side magnet 54 is fixed to the first yoke 11 and the first clamping plate 8 respectively; the second side magnet 55 is fixed to the first yoke 11 and the first clamping plate 8 respectively. The fixing effect of the first side magnet 54 and the second side magnet 55 is improved.

[0047] In this embodiment, the second clamping plate body 21, the first connecting portion 22, the second connecting portion 23 and the support portion 24 are integrally formed. The integral structure is convenient to form and has high structural strength. The risk of deformation of the second clamping plate 2 after mechanical experiments is reduced. At the same time, the integrally formed structure is formed by stamping and injection molding, so that the first connecting portion 22 and the second connecting portion 23 are perpendicular to the second clamping plate body 21 respectively, the support portion 24 is parallel to the second clamping plate body 21, and the forming performance of the support portion 24 and the second clamping plate body 21 is good.

[0048] The first vibrating diaphragm 31 comprises a first folded ring 312 in a ring shape, a first fixed part 311 extending outwardly from the outer periphery of the first folded ring 312, a first vibrating part 313 extending inwardly from the inner periphery of the first folded ring 312, and a first ball top 314 fixed to the first vibrating part 313 on the side close to the second vibrating system 4. The first fixed part 311 is fixed to the first yoke 11 on the side away from the second vibrating system 4, and the first voice coil 32 is fixed to the first ball top 314 on the side close to the second vibrating system 4.

[0049] The second vibrating diaphragm 41 comprises a second folded ring 412 in a ring shape, a second fixed part 411 extending outwardly from the outer periphery of the second folded ring 412, a second vibrating part 413 extending inwardly from the inner periphery of the second folded ring 412, and a second ball top 414 fixed to the second vibrating part 413 on the side away from the first vibrating system 3. The second fixed part 411 is fixed to the second yoke 12 on the side away from the first vibrating system 3, and the second voice coil 42 and the third voice coil 43 are respectively fixed to the second fixed part 411 on the side away from the second ball top 414.

[0050] The sound generating device 100 further comprises a first circuit board 7, one end of the first circuit board 7 being fixed to the first yoke 11 on the side close to the second yoke 12, and the other end of the first circuit board 7 being fixed to the first voice coil 32 on the side away from the side close to the second vibrating system 4 to realize electrical connection. The first circuit board 7 can be a FPC board to realize electrical connection. The first circuit board 7 comprises two, which are respectively arranged at opposite ends of the first voice coil 32, so as to increase the vibration intensity of the first vibrating diaphragm 31 to improve the loudness and sensitivity of sound, and prevent the first voice coil 32 from generating horizontal swing when vibrating to improve reliability.

[0051] The sound generating device 100 further comprises a second circuit board 6, the second circuit board 6 being fixed to the second yoke 12 on the side away from the first vibrating system 3. The second vibrating diaphragm 41 is fixed to the second circuit board 6 on the side away from the first yoke 11, the second voice coil 42 and the third voice coil 43 are respectively fixed to the second circuit board 6 on the side close to the first vibrating system 3, and the second circuit board 6 is electrically connected with the second voice coil 42 and the third voice coil 43. The end of the second circuit board 6 away from the second yoke 12 is used to connect an external power supply, and the second voice coil 42 and the third voice coil 43 are supplied with power through the connection of the external power supply, so that the second voice coil 42 and the third voice coil 43 are energized to drive the second vibrating diaphragm 41 to vibrate and generate sound. The second vibrating diaphragm 41 has good vibration performance by using the double-voice-coil arrangement. Optionally, the second circuit board 6 is a 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 see Figures 1-7 As shown, the structure of this second embodiment is basically the same as that of the first embodiment. The difference is 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 setup and wide applicability.

[0055] Example 3

[0056] Please see Figures 8-9 As shown, 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 production device comprises: a yoke comprising a first yoke and a second yoke fixed to the first yoke; a first vibration system fixed to a side of the first yoke away from the second yoke; the first vibration system comprising a first diaphragm fixed to the first yoke and a first voice coil driving the first diaphragm to vibrate and produce sound; a second vibration system fixed to a side of the second yoke away from the first yoke; the second vibration system comprising a second diaphragm fixed to the second yoke and a second voice coil and a third voice coil jointly driving the second diaphragm to vibrate and produce sound; a first clamping plate in the shape of a ring, an outer periphery of the first clamping plate being fixed to the first yoke; a second clamping plate comprising a second clamping plate body in the shape of a ring fixed to the second yoke, a first connecting portion formed by bending and extending two opposite sides of the second clamping plate body away from the second diaphragm, a second connecting portion formed by bending and extending the other two opposite sides of the second clamping plate body away from the second diaphragm, and a support portion arranged parallel to the second clamping plate body and located on a side of the second clamping plate body close 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 comprising a first main magnetic unit and a second main magnetic unit arranged side by side and fixed to a side of the support portion away from the first diaphragm, a first side magnet fixed to the second clamping plate body on opposite sides of the first main magnetic unit in a direction parallel to the long axis of the magnetic circuit system, and a second side magnet fixed to the second clamping plate body on opposite sides of the second main magnetic unit in a direction parallel to the long axis of the magnetic circuit system; the first side magnet and the second side magnet are arranged at intervals with the first main magnetic unit and the second main magnetic unit to form a magnetic gap, the second voice coil and the third voice coil are arranged at intervals in the first voice coil, the first voice coil, the second voice coil and the third voice coil are respectively inserted into the magnetic gap; the first side magnet and the second side magnet are respectively fixed to the first clamping plate.

2. The sound production device of claim 1, wherein, The second clamping plate body, the first connecting portion, the second connecting portion and the support portion are integrally formed.

3. The sound production device of claim 1, wherein, The first connecting portion, the second connecting portion and the support portion are integrally formed and fixedly connected with the second clamping plate body through the first connecting portion and the second connecting portion.

4. The sound production device of claim 3, wherein, A first recess and a second recess are respectively recessed on a side of the second clamping plate body close to the second diaphragm, the first recess is located on two opposite sides of the second clamping plate body, and the second recess is located on the other two opposite sides of the second clamping plate body; The first connecting portion comprises a first connecting portion body fixed to the support portion and a first step recessed from the first connecting portion body away from the first diaphragm; the first step is arranged in the first recess; The second connecting part comprises a second connecting part body fixed to the support part and a second step recessed from the second connecting part body in a direction away from the first diaphragm; and the second step is arranged in the second groove.

5. The sound production device of claim 1, wherein, The first diaphragm comprises a first ring-shaped folded ring, a first fixed part extended outward from an outer periphery of the first folded ring, a first vibration part extended inward from an inner periphery of the first folded ring, and a first ball top fixed to a side of the first vibration part close to the second vibration system; the first fixed part is fixed to a side of the first yoke away from the second vibration system, and the first voice coil is fixed to a side of the first ball top close to the second vibration system.

6. The sound production device of claim 1, wherein, The sound generating device further comprises a first circuit board, one end of the first circuit board is fixed to a side of the first yoke close to the second yoke, and the other end of the first circuit board is fixed to a side of the first voice coil away from the side close to the second vibration system to realize electrical connection.

7. The sound production device of claim 1, wherein, The second diaphragm comprises a second ring-shaped folded ring, a second fixed part extended outward from an outer periphery of the second folded ring, a second vibration part extended inward from an inner periphery of the second folded ring, and a second ball top fixed to a side of the second vibration part away from the first vibration system; the second fixed part is fixed to a side of the second yoke away from the first vibration system, and the second voice coil and the third voice coil are respectively fixed to a side of the second fixed part away from the second ball top.

8. The sound production device of claim 7, wherein, The sound generating device further comprises a second circuit board, the second circuit board is fixed to a side of the second yoke away from the first vibration system in a stacked manner; the second diaphragm is fixed to a side of the second circuit board away from the first yoke in a stacked manner, the second voice coil and the third voice coil are respectively fixed to a side of the second circuit board close to the first vibration system, and the second circuit board is electrically connected with the second voice coil and the third voice coil respectively.

9. The sound production device of claim 1, wherein, The first main magnetic steel unit comprises a first main magnetic steel fixed to the support part and a first pole core fixed to a side of the first main magnetic steel away from the first vibration system in a stacked manner; The second main magnetic steel unit comprises a second main magnetic steel fixed to the support part and a second pole core fixed to a side of the second main magnetic steel away from the second vibration system in a stacked manner; The first main magnetic steel and the second main magnetic steel form the magnetic gap with the first side magnetic and the second side magnetic respectively.

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