Sounding device

Abstract

The utility model provides a sound production device. The sound production device comprises a basin stand; the vibration system comprises a vibrating diaphragm, a first voice coil and a second voice coil, wherein the outer periphery of the vibrating diaphragm is fixed on the basin frame; the first voice coil is inserted and suspended in the first magnetic gap, and the second voice coil is inserted and suspended in the second magnetic gap; the magnetic circuit system comprises a lower clamping plate, a first central magnetic steel and a second central magnetic steel which are stacked and fixed on the lower clamping plate and are mutually spaced, a first auxiliary magnetic steel and a second auxiliary magnetic steel which are stacked and fixed on the lower clamping plate, and a special-shaped edge magnetic steel which is stacked and fixed on the lower clamping plate; the special-shaped edge magnetic steel comprises an edge magnet body, a first edge magnet and a second edge magnet, the edge magnet body is arranged between the first center magnetic steel and the second center magnetic steel, the first auxiliary magnetic steel is located on the side, away from the special-shaped edge magnetic steel, of the first center magnetic steel, and the second auxiliary magnetic steel is located on the side, away from the special-shaped edge magnetic steel, of the second center magnetic steel. Compared with the prior art, the sounding device provided by the utility model has good acoustic performance.

Description

Technical Field

[0001] The utility model relates to the field of electroacoustic conversion, in particular to a sound-generating device. Background Art

[0002] A sound-generating device is a transducer device that converts electrical signals into sound signals. It is mainly divided into two modes: a single vibration system and a double vibration system. Among them, the sound-generating device in the single vibration system mode mainly includes a basin frame, a vibration system fixed to the basin frame for emitting sound, and a magnetic circuit system for driving the vibration system to vibrate.

[0003] In the sound-generating device of the single vibration system mode of the related art, the vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate. The voice coil is suspended in the magnetic gap of the magnetic circuit system, and the magnetic circuit system drives the voice coil to vibrate and produce sound. Therefore, the sound-generating device of the related art achieves the effect of sound generation by setting the diaphragm and the voice coil in a one-to-one correspondence. However, in the sound-generating device of the related art, the driving force of the single voice coil is weakened, so that the acoustic performance of the sound-generating device is reduced.

[0004] Therefore, it is necessary to provide a new sound-generating device to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a sound-generating device which can connect double voice coils in series or in parallel to obtain a greater driving force and improve the acoustic performance.

[0006] In order to achieve the above object, the utility model provides a sound-generating device, the sound-generating device comprising:

[0007] basin stand;

[0008] A vibration system, the vibration system comprising a diaphragm whose outer periphery is fixed to the basin frame and a first voice coil and a second voice coil that drive the diaphragm to vibrate and generate sound; and,

[0009] A magnetic circuit system, wherein the magnetic circuit system is fixed to the basin frame, and a first magnetic gap and a second magnetic gap are arranged at intervals on a side of the magnetic circuit system close to the vibration system; the first voice coil is inserted and suspended in the first magnetic gap, and the second voice coil is inserted and suspended in the second magnetic gap;

[0010] The magnetic circuit system comprises a lower clamping plate, a first central magnetic steel and a second central magnetic steel stacked and fixed to the lower clamping plate and spaced from each other, a first secondary magnetic steel and a second secondary magnetic steel stacked and fixed to the lower clamping plate, and a special-shaped edge magnetic steel stacked and fixed to the lower clamping plate; the special-shaped edge magnetic steel is arranged between the first central magnetic steel and the second central magnetic steel, the first secondary magnetic steel is located on a side of the first central magnetic steel away from the special-shaped edge magnetic steel, and the second secondary magnetic steel is located on a side of the second central magnetic steel away from the special-shaped edge magnetic steel;

[0011] The special-shaped edge magnet includes an edge magnet body, a first edge magnet and a second edge magnet formed by bending and extending the two ends of the edge magnet body respectively, the edge magnet body is arranged between the first center magnet and the second center magnet, the first edge magnet is located on the same side of the first center magnet and the second center magnet, and the second edge magnet is located on the other same side of the first center magnet and the second center magnet; the edge magnet body, the first edge magnet, the first secondary magnet and the first center magnet together form the first magnetic gap; the edge magnet body, the second edge magnet, the second secondary magnet and the second center magnet together form the second magnetic gap.

[0012] Preferably, the first central magnetic steel comprises a first main magnetic steel stacked and fixed to the lower clamping plate, a first pole core stacked and fixed to the first main magnetic steel, and a first magnetic member stacked and fixed to the first pole core;

[0013] The second central magnetic steel includes a second main magnetic steel stacked and fixed to the lower clamping plate, a second pole core stacked and fixed to the second main magnetic steel, and a second magnetic member stacked and fixed to the second pole core.

[0014] Preferably, the first magnetic member comprises a first magnetic member body stacked and fixed to the first pole core and a first magnetic steel extension portion in the shape of a boss formed by extending from a side of the first magnetic member body away from the first pole core;

[0015] The second magnetic member includes a second magnetic member body stacked and fixed on the second pole core and a second magnetic steel extension portion in a boss shape extending from a side of the second magnetic member body away from the second pole core.

[0016] Preferably, the diaphragm includes a vibration part, an outer folding ring extending from the outer periphery of the vibration part to form an annular shape, a fixing part extending from the outer periphery of the outer folding ring and fixed to the basin frame, a first clearance hole and a second clearance hole formed through the vibration part and spaced from each other, a first inner folding ring extending from the inner periphery of the first clearance hole to form an annular shape, a second inner folding ring extending from the inner periphery of the second clearance hole to form an annular shape, a first supporting part extending from the inner periphery of the first inner folding ring, and a second supporting part extending from the inner periphery of the second inner folding ring; the first supporting part is stacked and fixed to a side of the first magnetic part body close to the diaphragm, and the second supporting part is stacked and fixed to a side of the second magnetic part body close to the diaphragm;

[0017] A first avoidance position is formed through the first support portion, and a second avoidance position is formed through the second support portion; the first magnetic steel extension portion and the second magnetic steel extension portion are respectively arranged in the first avoidance position and the second avoidance position.

[0018] Preferably, the magnetic circuit system further comprises an upper clamping plate, and the upper clamping plate is stacked and fixed on a side of the special-shaped edge magnetic steel close to the vibration system.

[0019] Preferably, the sound-generating device also includes a skeleton, through which a first through hole and a second through hole are formed opposite to each other, the side of the skeleton close to the vibration system is fixed to the diaphragm, the first voice coil and the second voice coil are both fixed to the side of the skeleton away from the diaphragm and are respectively arranged around the first through hole and the second through hole; the first center magnet and the second center magnet respectively pass through the first through hole and the second through hole on the side close to the vibration system.

[0020] Preferably, the skeleton includes a skeleton body provided with the first through hole and the second through hole, and a first fixing portion and a second fixing portion respectively bent and extended from the hole walls of the first through hole and the second through hole toward a side close to the magnetic circuit system; the skeleton body is fixed to the diaphragm, and the first voice coil and the second voice coil are respectively fixed to a side of the first fixing portion and the second fixing portion close to the magnetic circuit system.

[0021] Preferably, the sound-generating device also includes an elastic support component, and the skeleton also includes an extension portion formed by bending and extending the opposite sides of the skeleton body in a direction close to the magnetic circuit system, one end of the elastic support component is fixed to the basin frame, and the other end of the elastic support component is fixed to the extension portion.

[0022] Preferably, the elastic support assembly includes an elastic member and an auxiliary diaphragm, one end of the elastic member is fixed to the basin frame, the other end of the elastic member is fixed to the extension portion, and the auxiliary diaphragm is fixed to a side of the elastic member away from the vibration system.

[0023] Compared with the prior art, in the sound-generating device of the present invention, a corresponding first voice coil and a second voice coil are arranged through a single diaphragm, and the first voice coil and the second voice coil can be connected in series or in parallel; the special-shaped edge magnetic steel is arranged between the first central magnetic steel and the second central magnetic steel, the first secondary magnetic steel is located on the side of the first central magnetic steel away from the special-shaped edge magnetic steel, and the second secondary magnetic steel is located on the side of the second central magnetic steel away from the special-shaped edge magnetic steel; the edge magnetic body of the special-shaped edge magnetic steel is arranged between the first central magnetic steel and the second central magnetic steel at intervals, the first edge magnetic steel is located on the same side of the first central magnetic steel and the second central magnetic steel, and the second edge magnetic steel is located on the other same side of the first central magnetic steel and the second central magnetic steel; the edge magnetic body, the first edge magnetic steel, the first secondary magnetic steel and the first central magnetic steel together form the first magnetic gap; the edge magnetic body, the second edge magnetic steel, the second secondary magnetic steel and the second central magnetic steel together form the second magnetic gap; the first voice coil and the second voice coil are driven respectively by the first central magnetic steel and the second central magnetic steel corresponding to the magnetic circuit system, so as to obtain a greater driving force and improve the acoustic performance of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a sound-generating device provided in an embodiment of the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the decomposition of

[0027] Figure 3 For along Figure 1 The cross-section diagram of the AA line;

[0028] Figure 4 A schematic diagram of the structure of a skeleton provided in an embodiment of the utility model;

[0029] Figure 5 A schematic diagram of the three-dimensional structure of a sound-generating device provided in another embodiment of the utility model;

[0030] Figure 6 for Figure 5 Schematic diagram of the decomposition of

[0031] Figure 7 For along Figure 5 Cross-sectional view of the middle BB line;

[0032] Figure 8 This is a graph showing the acoustic performance of the sound-generating device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Combination Figures 1 to 8 As shown, the embodiment of the utility model provides a sound-generating device 100, and the sound-generating device 100 includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3;

[0035] The basin frame 1 is used for fixing and supporting the installation of the magnetic circuit system 3 and the vibration system 2 .

[0036] The vibration system 2 includes a diaphragm 21 whose outer periphery is fixed to the basin frame 1, and a first voice coil 22 and a second voice coil 23 for driving the diaphragm 21 to vibrate and produce sound. The first voice coil 22 and the second voice coil 23 can be connected in series or in parallel to obtain a greater driving force and good vibration performance. Preferably, the first voice coil 22 and the second voice coil 23 are arranged along the long axis direction of the sound-generating device 100, or the first voice coil 22 and the second voice coil 23 are arranged along the short axis direction of the sound-generating device 100.

[0037] The magnetic circuit system 3 is fixed to the basin frame 1, and a first magnetic gap 37 and a second magnetic gap 38 are arranged on one side of the magnetic circuit system 3 close to the vibration system 2; the first voice coil 22 is inserted and suspended in the first magnetic gap 37, and the second voice coil 23 is inserted and suspended in the second magnetic gap 38.

[0038] The magnetic circuit system 3 includes a lower clamping plate 31, a first central magnetic steel 32 and a second central magnetic steel 33 stacked and fixed on the lower clamping plate 31 and spaced from each other, a first secondary magnetic steel 34 and a second secondary magnetic steel 35 stacked and fixed on the lower clamping plate 31, and a special-shaped edge magnetic steel 36 stacked and fixed on the lower clamping plate 31; the special-shaped edge magnetic steel 36 is arranged between the first central magnetic steel 32 and the second central magnetic steel 33, the first secondary magnetic steel 34 is located on the side of the first central magnetic steel 32 away from the special-shaped edge magnetic steel 36, and the second secondary magnetic steel 35 is located on the side of the second central magnetic steel 33 away from the special-shaped edge magnetic steel 36.

[0039] The first secondary magnetic steel 34 is located on the long axis side of the first central magnetic steel 32 and away from the side of the special-shaped side magnetic steel 36, and the second secondary magnetic steel 35 is located on the long axis side of the second central magnetic steel 33 and away from the side of the special-shaped side magnetic steel 36. The first central magnetic steel 32 and the second central magnetic steel 33, the first secondary magnetic steel 34, the second secondary magnetic steel 35 and the special-shaped side magnetic steel 36 generate a magnetic field for driving the first voice coil 22 and the second voice coil 23 to vibrate and produce sound.

[0040] The special-shaped edge magnet 36 includes an edge magnet body 361, a first edge magnet 362 and a second edge magnet 363 formed by bending and extending the two ends of the edge magnet body 361, the edge magnet body 361 is arranged between the first center magnet 32 ​​and the second center magnet 33, the first edge magnet 362 is located on the same side of the first center magnet 32 ​​and the second center magnet 33, and the second edge magnet 363 is located on the other same side of the first center magnet 32 ​​and the second center magnet 33; the edge magnet body 361, the first edge magnet 362, the second edge magnet 363, the first secondary magnet 34 and the first center magnet together form the first magnetic gap 37; the edge magnet body 361, the second edge magnet 363, the second secondary magnet 35 and the second center magnet 33 together form the second magnetic gap 38. The first central magnetic steel 32 and the second central magnetic steel 33 of the magnetic circuit system 3 drive the first voice coil 22 and the second voice coil 23 respectively, thereby obtaining a greater driving force and improving the acoustic performance of the sound device 100. Wide range of applications, the volume of the BOX back cavity of the sound device V<8cm 3 The first edge magnet 362 and the second edge magnet 363 are located at two sides of the short axis of the first central magnetic steel 32 and the second central magnetic steel 33 respectively.

[0041] In this embodiment, the first central magnetic steel 32 includes a first main magnetic steel 321 stacked and fixed to the lower clamping plate 31, a first pole core 322 stacked and fixed to the first main magnetic steel 321, and a first magnetic member 323 stacked and fixed to the first pole core 322. The second central magnetic steel 33 includes a second main magnetic steel 331 stacked and fixed to the lower clamping plate 31, a second pole core 332 stacked and fixed to the second main magnetic steel 331, and a second magnetic member 333 stacked and fixed to the second pole core 332.

[0042] In this embodiment, the first magnetic member 323 includes a first magnetic member body 3231 stacked and fixed on the first pole core 322 and a first magnetic steel extension portion 3232 formed by extending from one side of the first magnetic member body 3231 away from the first pole core 322 and forming a boss-shaped first magnetic steel extension portion 3232. The second magnetic member 333 includes a second magnetic member body 3331 stacked and fixed on the second pole core 332 and a second magnetic steel extension portion 3332 formed by extending from one side of the second magnetic member body 3331 away from the second pole core 332 and forming a boss-shaped second magnetic steel extension portion 3332.

[0043] In this embodiment, the diaphragm 21 includes a vibration part 213, an outer folding ring 212 extending from the outer periphery of the vibration part 213 to form an annular shape, a fixing part 211 extending from the outer periphery of the outer folding ring 212, a first clearance hole 218 and a second clearance hole 219 formed through the vibration part 213 and spaced apart from each other, a first inner folding ring 214 extending from the inner periphery of the first clearance hole 218 to form an annular shape, a second inner folding ring 215 extending from the inner periphery of the second clearance hole 219 to form an annular shape, a first supporting part 216 extending from the inner periphery of the first inner folding ring 214, and a second supporting part 217 extending from the inner periphery of the second inner folding ring 215; the first supporting part 216 is stacked and fixed on a side of the first magnetic part body 3231 close to the diaphragm 21, and the second supporting part 217 is stacked and fixed on a side of the second magnetic part body 3331 close to the diaphragm 21.

[0044] The first support portion 216 is formed through a first avoidance position 4, and the second support portion 217 is formed through a second avoidance position 5; the first magnetic steel extension portion 3232 and the second magnetic steel extension portion 3332 are respectively arranged in the first avoidance position 4 and the second avoidance position 5. The first magnetic steel unit and the second magnetic steel unit are conveniently installed, the magnetic field performance of the magnetic circuit system 3 is increased, and a greater driving force is further provided, thereby improving the acoustic performance of the sound-generating device 100.

[0045] In this embodiment, the magnetic circuit system 3 further includes an upper clamping plate 39 , which is stacked and fixed on a side of the special-shaped edge magnetic steel 36 close to the vibration system 2 , thereby improving the magnetic field performance of the magnetic circuit system 3 .

[0046] In this embodiment, the sound-generating device 100 further includes a frame 6, on which a first through hole 65 and a second through hole 66 are formed to be oppositely arranged. The side of the frame 6 close to the vibration system 2 is fixed to the diaphragm 21, and the first voice coil 22 and the second voice coil 23 are fixed to the side of the frame 6 away from the diaphragm 21 and are arranged around the first through hole 65 and the second through hole 66 respectively; the side of the first central magnetic steel 32 and the second central magnetic steel 33 close to the vibration system 2 passes through the first through hole 65 and the second through hole 66 respectively. It is convenient to install and fix the first voice coil 22 and the second voice coil 23, so that the first voice coil 22 and the second voice coil 23 are suspended in the first magnetic gap 37 and the second magnetic gap 38. The double hole arrangement of the first through hole 65 and the second through hole 66 on the frame 6 facilitates the installation of the first magnetic steel unit and the second magnetic steel unit, saves the installation space of the magnetic circuit system 3, and can also obtain greater driving force, thereby improving the acoustic performance of the sound-generating device 100.

[0047] Preferably, the first through hole 65 and the second through hole 66 are arranged relatively spaced apart along the extending direction of the long axis of the skeleton 6 .

[0048] Preferably, the first through hole 65 and the second through hole 66 are arranged relatively spaced apart along the extension direction of the minor axis of the skeleton 6 .

[0049] In this embodiment, the skeleton 6 includes a skeleton body 61 provided with the first through hole 65 and the second through hole 66, and a first fixing portion 63 and a second fixing portion 64 respectively bent and extended by the hole walls of the first through hole 65 and the second through hole 66 toward a side close to the magnetic circuit system 3; the skeleton body 61 is fixed to the diaphragm 21, and the first voice coil 22 and the second voice coil 23 are respectively fixed to a side of the first fixing portion 63 and the second fixing portion 64 close to the magnetic circuit system 3. It is convenient to suspend the first voice coil 22 and the second voice coil 23 in the first magnetic gap 37 and the second magnetic gap 38, and the driving effect of the magnetic circuit system 3 is better.

[0050] In this embodiment, the sound-generating device 100 also includes an elastic support component 7, and the skeleton 6 also includes an extension portion 62 formed by bending and extending the opposite sides of the skeleton body 61 in a direction close to the magnetic circuit system 3, one end of the elastic support component 7 is fixed to the basin frame 1, and the other end of the elastic support component 7 is fixed to the extension portion 62.

[0051] The elastic support assembly 7 includes an elastic member 71 and an auxiliary diaphragm 72, one end of the elastic member 71 is fixed to the basin frame 1, the other end of the elastic member 71 is fixed to the extension portion 62, and the auxiliary diaphragm 72 is fixed to the side of the elastic member 71 away from the vibration system 2. The elastic member 71 can be an FPC, in which case the voice coil can be electrically connected to the FPC, and can also be used to introduce electrical signals to the voice coil to avoid wire breakage through the lead wire. The elastic member 71 can also be directly connected to the voice coil, or indirectly connected to the voice coil through the skeleton 6. The auxiliary diaphragm 8 is fixed to the side of the basin frame 1 away from the diaphragm. The auxiliary diaphragm 8 increases the vibration intensity of the diaphragm 21 to improve the sound loudness and sensitivity; it prevents lateral swing when the voice coil vibrates and improves reliability.

[0052] In this embodiment, the bending direction of the auxiliary diaphragm 8 is the same as the bending direction of the outer fold ring 212 .

[0053] In this embodiment, when the frequency of the sound-generating device 100 is within 10000 Hz, its sensitivity is significantly higher than that of the sound-generating device in the related art, and its sound-generating performance is good.

[0054] Compared with the prior art, in the sound-generating device of the present invention, a corresponding first voice coil and a second voice coil are arranged through a single diaphragm, and the first voice coil and the second voice coil can be connected in series or in parallel; the special-shaped edge magnetic steel is arranged between the first central magnetic steel and the second central magnetic steel, the first secondary magnetic steel is located on the side of the first central magnetic steel away from the special-shaped edge magnetic steel, and the second secondary magnetic steel is located on the side of the second central magnetic steel away from the special-shaped edge magnetic steel; the edge magnetic body of the special-shaped edge magnetic steel is arranged between the first central magnetic steel and the second central magnetic steel at intervals, the first edge magnetic steel is located on the same side of the first central magnetic steel and the second central magnetic steel, and the second edge magnetic steel is located on the other same side of the first central magnetic steel and the second central magnetic steel; the edge magnetic body, the first edge magnetic steel, the first secondary magnetic steel and the first central magnetic steel together form the first magnetic gap; the edge magnetic body, the second edge magnetic steel, the second secondary magnetic steel and the second central magnetic steel together form the second magnetic gap; the first voice coil and the second voice coil are driven respectively by the first central magnetic steel and the second central magnetic steel corresponding to the magnetic circuit system, so as to obtain a greater driving force and improve the acoustic performance of the sound-generating device.

[0055] The above is only an implementation method of the present invention. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the protection scope of the present invention.

Claims

1. A sound-generating device, comprising: basin stand; A vibration system, the vibration system comprising a diaphragm whose outer periphery is fixed to the basin frame, and a first voice coil and a second voice coil that drive the diaphragm to vibrate and generate sound; as well as, A magnetic circuit system, wherein the magnetic circuit system is fixed to the basin frame, and a first magnetic gap and a second magnetic gap are arranged at intervals on one side of the magnetic circuit system close to the vibration system; the first voice coil is inserted and suspended in the first magnetic gap, and the second voice coil is inserted and suspended in the second magnetic gap; characterized in that: The magnetic circuit system comprises a lower clamping plate, a first central magnetic steel and a second central magnetic steel stacked and fixed to the lower clamping plate and spaced from each other, a first secondary magnetic steel and a second secondary magnetic steel stacked and fixed to the lower clamping plate, and a special-shaped edge magnetic steel stacked and fixed to the lower clamping plate; the special-shaped edge magnetic steel is arranged between the first central magnetic steel and the second central magnetic steel, the first secondary magnetic steel is located on a side of the first central magnetic steel away from the special-shaped edge magnetic steel, and the second secondary magnetic steel is located on a side of the second central magnetic steel away from the special-shaped edge magnetic steel; The special-shaped edge magnet includes an edge magnet body, a first edge magnet and a second edge magnet formed by bending and extending the two ends of the edge magnet body respectively, the edge magnet body is arranged between the first center magnet and the second center magnet, the first edge magnet is located on the same side of the first center magnet and the second center magnet, and the second edge magnet is located on the other same side of the first center magnet and the second center magnet; the edge magnet body, the first edge magnet, the first secondary magnet and the first center magnet together form the first magnetic gap; the edge magnet body, the second edge magnet, the second secondary magnet and the second center magnet together form the second magnetic gap.

2. The sound-generating device according to claim 1, characterized in that: The first central magnetic steel comprises a first main magnetic steel stacked and fixed to the lower clamping plate, a first pole core stacked and fixed to the first main magnetic steel, and a first magnetic member stacked and fixed to the first pole core; The second central magnetic steel includes a second main magnetic steel stacked and fixed to the lower clamping plate, a second pole core stacked and fixed to the second main magnetic steel, and a second magnetic member stacked and fixed to the second pole core.

3. The sound-generating device according to claim 2, characterized in that: The first magnetic member comprises a first magnetic member body stacked and fixed to the first pole core and a first magnetic steel extension portion in the shape of a boss extending from a side of the first magnetic member body away from the first pole core; The second magnetic member includes a second magnetic member body stacked and fixed on the second pole core and a second magnetic steel extension portion in a boss shape extending from a side of the second magnetic member body away from the second pole core.

4. The sound-generating device according to claim 3, characterized in that: The diaphragm includes a vibration part, an outer folding ring extending from the outer periphery of the vibration part to form an annular shape, a fixing part extending from the outer periphery of the outer folding ring and fixed to the basin frame, a first and a second folding holes formed through the vibration part and spaced from each other, a first inner folding ring extending from the inner periphery of the first folding hole to form an annular shape, a second inner folding ring extending from the inner periphery of the second folding hole to form an annular shape, a first supporting part extending from the inner periphery of the first inner folding ring, and a second supporting part extending from the inner periphery of the second inner folding ring; the first supporting part is stacked and fixed on a side of the first magnetic part body close to the diaphragm, and the second supporting part is stacked and fixed on a side of the second magnetic part body close to the diaphragm; A first avoidance position is formed through the first support portion, and a second avoidance position is formed through the second support portion; the first magnetic steel extension portion and the second magnetic steel extension portion are respectively arranged in the first avoidance position and the second avoidance position.

5. The sound-generating device according to claim 1, characterized in that: The magnetic circuit system also includes an upper clamping plate, which is stacked and fixed on a side of the special-shaped edge magnetic steel close to the vibration system.

6. The sound-generating device according to claim 1, characterized in that: The sound-generating device also includes a frame, through which a first through hole and a second through hole are formed opposite to each other, the side of the frame close to the vibration system is fixed to the diaphragm, the first voice coil and the second voice coil are both fixed to the side of the frame away from the diaphragm and are respectively arranged around the first through hole and the second through hole; the first center magnetic steel and the second center magnetic steel respectively pass through the first through hole and the second through hole on the side close to the vibration system.

7. The sound-generating device according to claim 6, characterized in that: The skeleton includes a skeleton body provided with the first through hole and the second through hole, and a first fixing portion and a second fixing portion respectively bent and extended from the hole walls of the first through hole and the second through hole toward a side close to the magnetic circuit system; the skeleton body is fixed to the diaphragm, and the first voice coil and the second voice coil are respectively fixed to a side of the first fixing portion and the second fixing portion close to the magnetic circuit system.

8. The sound-generating device according to claim 7, characterized in that: The sound-generating device also includes an elastic support component, and the skeleton also includes an extension portion formed by bending and extending the opposite sides of the skeleton body toward the direction close to the magnetic circuit system, one end of the elastic support component is fixed to the basin frame, and the other end of the elastic support component is fixed to the extension portion.

9. The sound-generating device according to claim 8, characterized in that: The elastic support assembly includes an elastic member and an auxiliary diaphragm, one end of the elastic member is fixed to the basin frame, the other end of the elastic member is fixed to the extension portion, and the auxiliary diaphragm is fixed to a side of the elastic member away from the vibration system.

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