Sound production device

Abstract

Provided in the present utility model is a sound production device, comprising: a basket; a vibration system comprising a diaphragm having an outer periphery fixed to the basket, and a first voice coil and a second voice coil; and a magnetic circuit system, the first voice coil being inserted and suspended in a first magnetic gap, and the second voice coil being inserted and suspended in a 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 spaced apart from each other, a first auxiliary magnetic steel and a second auxiliary magnetic steel which are stacked and fixed on the lower clamping plate, and a specially-shaped edge magnetic steel which is stacked and fixed on the lower clamping plate. The specially-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 central magnetic steel and the second central magnetic steel; and the first auxiliary magnetic steel is located on the side of the first central magnetic steel away from the specially-shaped edge magnetic steel, and the second auxiliary magnetic steel is located on the side of the second central magnetic steel away from the specially-shaped edge magnetic steel. Compared with the prior art, the sound production device of the present utility model has a good acoustic performance.

Description

Sound-generating device 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. Technical issues

[0003] In related art sound-generating devices using a single vibration system, the vibration system includes a diaphragm fixed to a frame and a voice coil that drives the diaphragm. The voice coil is suspended within a magnetic gap in a magnetic circuit system, which drives the voice coil to vibrate and produce sound. Therefore, related art sound-generating devices achieve sound production through a one-to-one correspondence between the diaphragm and the voice coil. However, in related art sound-generating devices, the driving force of a single voice coil is weakened, resulting in reduced acoustic performance.

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

[0005] The purpose of the utility model is to provide a sound-generating device with dual voice coils that can be connected in series or in parallel to obtain a greater driving force and improve acoustic performance.

[0006] In order to achieve the above object, the present invention provides a sound-generating device, which includes:

[0007] basin rack;

[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 produce sound; and

[0009] a magnetic circuit system, the magnetic circuit system being fixed to the basin frame, and having a first magnetic gap and a second magnetic gap spaced apart on a side of the magnetic circuit system close to the vibration system; the first voice coil being inserted and suspended in the first magnetic gap, and the second voice coil being inserted and suspended in the second magnetic gap;

[0010] The magnetic circuit system includes 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 apart 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 includes 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 on the lower clamping plate, a second pole core stacked and fixed on the second main magnetic steel, and a second magnetic member stacked and fixed on 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 vibrating portion, an outer folding ring extending from the outer periphery of the vibrating portion to form an annular shape, a fixing portion extending from the outer periphery of the outer folding ring and fixed to the basin frame, a first and a second paving hole formed through the vibrating portion and spaced apart from each other, a first inner folding ring extending from the inner periphery of the first paving hole to form an annular shape, a second inner folding ring extending from the inner periphery of the second paving hole to form an annular shape, a first supporting portion extending from the inner periphery of the first inner folding ring, and a second supporting portion extending from the inner periphery of the second inner folding ring; the first supporting portion is stacked and fixed to a side of the first magnetic component body close to the diaphragm, and the second supporting portion is stacked and fixed to a side of the second magnetic component 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 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.

[0019] Preferably, the sound-generating device further comprises a skeleton, through which a first through hole and a second through hole arranged opposite to each other are formed, 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 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 the 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 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.

[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 the side of the elastic member away from the vibration system. Beneficial effects

[0023] Compared with the prior art, in the sound-generating device of the present invention, corresponding first and second voice coils are arranged through a single diaphragm, and the first and second voice coils can be connected in series or parallel; the special-shaped edge magnet is arranged between the first central magnet and the second central magnet, the first secondary magnet is located on the side of the first central magnet away from the special-shaped edge magnet, and the second secondary magnet is located on the side of the second central magnet away from the special-shaped edge magnet; the edge magnet bodies of the special-shaped edge magnet are arranged between the first central magnet and the second central magnet, the first edge magnet is located on the same side of the first central magnet and the second central magnet, and the second edge magnet is located on the opposite side of the first central magnet and the second central magnet; the edge magnet body, the first edge magnet, the first secondary magnet and the first central magnet together form a first magnetic gap; the edge magnet body, the second edge magnet, the second secondary magnet and the second central magnet together form a second magnetic gap; the first and second voice coils are driven respectively by the corresponding first central magnet and second central magnet of the magnetic circuit system, thereby obtaining a greater driving force and improving 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 invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0025] FIG1 is a schematic diagram of the three-dimensional structure of a sound-generating device provided in an embodiment of the present utility model;

[0026] FIG2 is an exploded schematic diagram of FIG1 ;

[0027] FIG3 is a cross-sectional view along line AA in FIG1 ;

[0028] FIG4 is a schematic structural diagram of a skeleton provided in an embodiment of the present invention;

[0029] FIG5 is a schematic diagram of the three-dimensional structure of a sound-generating device provided in another embodiment of the present invention;

[0030] FIG6 is an exploded schematic diagram of FIG5 ;

[0031] FIG7 is a cross-sectional view along line BB in FIG5 ;

[0032] FIG8 is a graph showing the acoustic performance of the sound-generating device according to an embodiment of the present invention. Modes for Carrying Out the Invention

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

[0034] 1 to 8 , an embodiment of the present invention provides a sound-generating device 100 , which includes a frame 1 , a vibration system 2 , and a magnetic circuit system 3 ;

[0035] The basin frame 1 is used to fix and support 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 frame 1, and a first voice coil 22 and a second voice coil 23 that drive the diaphragm 21 to vibrate and produce sound. The first and second voice coils 22, 23 can be connected in series or in parallel to achieve greater driving force and improve vibration performance. Preferably, the first and second voice coils 22, 23 are arranged along the long axis of the sound-generating device 100, or along the short axis 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 the 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 magnetic steel 36. 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 magnetic steel 36. The first and second central magnetic steels 32, 33, the first secondary magnetic steel 34, the second secondary magnetic steel 35, and the special-shaped magnetic steel 36 generate a magnetic field to drive the first and second voice coils 22, 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 and second central magnets 32 and 33 of the magnetic circuit system 3 drive the first and second voice coils 22 and 23, respectively, thereby generating greater driving force and improving the acoustic performance of the sound-generating device 100. This system has a wide range of applications, with the volume V of the back cavity of the sound-generating device being less than 8 cm³. The first and second edge magnets 362 and 363 are located on either side of the short axis of the first and second central magnets 32 and 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 to the first pole core 322, and a first magnetic steel extension portion 3232 extending from a side of the first magnetic member body 3231 away from the first pole core 322 to form a boss. The second magnetic member 333 includes a second magnetic member body 3331 stacked and fixed to the second pole core 332, and a second magnetic steel extension portion 3332 extending from a side of the second magnetic member body 3331 away from the second pole core 332 to form a boss.

[0043] In this embodiment, the diaphragm 21 includes a vibrating portion 213, an outer folding ring 212 extending from the outer periphery of the vibrating portion 213 to form an annular shape, a fixing portion 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 vibrating portion 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 portion 216 extending from the inner periphery of the first inner folding ring 214, and a second supporting portion 217 extending from the inner periphery of the second inner folding ring 215; the first supporting portion 216 is stacked and fixed on a side of the first magnetic member body 3231 close to the diaphragm 21, and the second supporting portion 217 is stacked and fixed on a side of the second magnetic member body 3331 close to the diaphragm 21.

[0044] A first clearance space 4 is formed through the first support portion 216, and a second clearance space 5 is formed through the second support portion 217. The first magnetic steel extension 3232 and the second magnetic steel extension 3332 are respectively disposed within the first clearance space 4 and the second clearance space 5. This facilitates the installation of the first and second magnetic steel units, increases the magnetic field performance of the magnetic circuit system 3, and further provides greater driving force, 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 having a first through-hole 65 and a second through-hole 66 formed therethrough, oppositely disposed therethrough. The side of the frame 6 proximal to the vibration system 2 is fixed to the diaphragm 21. The first voice coil 22 and the second voice coil 23 are both fixed to the side of the frame 6 distal from the diaphragm 21 and disposed around the first through-hole 65 and the second through-hole 66, respectively. The first central magnet 32 ​​and the second central magnet 33, on the side proximal to the vibration system 2, pass through the first through-hole 65 and the second through-hole 66, respectively. This facilitates the installation and fixation of the first and second voice coils 22, 23, so that they are suspended within the first and second magnetic gaps 37, 38. The dual arrangement of the first and second through-holes 65, 66 on the frame 6 facilitates the installation of the first and second magnetic units, saving installation space for the magnetic circuit system 3 while also providing 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 extending direction of the minor axis of the skeleton 6 .

[0049] In this embodiment, the skeleton 6 includes a skeleton body 61 having a first through hole 65 and a second through hole 66, and a first fixing portion 63 and a second fixing portion 64 that bend and extend from the walls of the first through hole 65 and the second through hole 66 toward the side closer 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 fixed to the first fixing portion 63 and the second fixing portion 64, respectively, on the side closer to the magnetic circuit system 3. This facilitates the suspension of the first and second voice coils 22 and 23 within the first and second magnetic gaps 37 and 38, thereby improving the driving effect of the magnetic circuit system 3.

[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, and the other end of the elastic member 71 is fixed to the extension portion 62. 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 this 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. 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, corresponding first and second voice coils are arranged through a single diaphragm, and the first and second voice coils can be connected in series or parallel; the special-shaped edge magnet is arranged between the first central magnet and the second central magnet, the first secondary magnet is located on the side of the first central magnet away from the special-shaped edge magnet, and the second secondary magnet is located on the side of the second central magnet away from the special-shaped edge magnet; the edge magnet bodies of the special-shaped edge magnet are arranged between the first central magnet and the second central magnet, the first edge magnet is located on the same side of the first central magnet and the second central magnet, and the second edge magnet is located on the opposite side of the first central magnet and the second central magnet; the edge magnet body, the first edge magnet, the first secondary magnet and the first central magnet together form a first magnetic gap; the edge magnet body, the second edge magnet, the second secondary magnet and the second central magnet together form a second magnetic gap; the first and second voice coils are driven respectively by the corresponding first central magnet and second central magnet of the magnetic circuit system, thereby obtaining a greater driving force and improving the acoustic performance of the sound-generating device.

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

Claims

1. A sounding device, the sounding device comprising: A chassis; A vibration system, the vibration system comprising a diaphragm with an outer periphery fixed to the chassis, and a first voice coil and a second voice coil for driving the diaphragm to vibrate and generate sound; And A magnetic circuit system, the magnetic circuit system being fixed to the chassis, and a first magnetic gap and a second magnetic gap being spaced apart 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; characterized in that The magnetic circuit system comprises a lower clamping plate, a first central magnet and a second central magnet which are stacked and fixed to the lower clamping plate and are spaced apart from each other, a first auxiliary magnet and a second auxiliary magnet which are stacked and fixed to the lower clamping plate, and a special-shaped edge magnet which is stacked and fixed to the lower clamping plate; the special-shaped edge magnet is arranged between the first central magnet and the second central magnet, the first auxiliary magnet is located on a side of the first central magnet away from the special-shaped edge magnet, and the second auxiliary magnet is located on a side of the second central magnet away from the special-shaped edge magnet; The special-shaped edge magnet comprises an edge magnet body, a first edge magnet and a second edge magnet which are respectively bent and extended from two ends of the edge magnet body, the edge magnet body is spaced apart between the first central magnet and the second central magnet, the first edge magnet is located on the same side of the first central magnet and the second central magnet, and the second edge magnet is located on the other same side opposite to the first central magnet and the second central magnet; the edge magnet body, the first edge magnet, the first auxiliary magnet and the first central magnet jointly enclose the first magnetic gap; the edge magnet body, the second edge magnet, the second auxiliary magnet and the second central magnet jointly enclose the second magnetic gap.

2. The sound generating device according to claim 1, wherein, The first central magnet comprises a first main magnet stacked and fixed to the lower clamping plate, a first pole core stacked and fixed to the first main magnet, and a first magnetic member stacked and fixed to the first pole core; The second central magnet comprises a second main magnet stacked and fixed to the lower clamping plate, a second pole core stacked and fixed to the second main magnet, 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 magnet extension portion in the shape of a convex platform protruding and extending from a side of the first magnetic member body away from the first pole core; The second magnetic member comprises a second magnetic member body stacked and fixed to the second pole core, and a second magnet extension portion in the shape of a convex platform 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, wherein, The diaphragm includes a vibrating portion, an outer folding ring formed by extending from the outer peripheral edge of the vibrating portion and having an annular shape, a fixing portion formed by extending from the outer peripheral edge of the outer folding ring and fixed to the chassis, a first relief hole and a second relief hole formed through the vibrating portion and spaced apart from each other, a first inner folding ring formed by extending from the inner peripheral edge of the first relief hole and having an annular shape, a second inner folding ring formed by extending from the inner peripheral edge of the second relief hole and having an annular shape, a first support portion formed by extending from the inner peripheral edge of the first inner folding ring, and a second support portion formed by extending from the inner peripheral edge of the second inner folding ring; the first support portion is stacked and fixed on one side of the first magnetic member body close to the diaphragm, and the second support portion is stacked and fixed on one side of the second magnetic member body close to the diaphragm; A first relief space is formed through the first support portion, and a second relief space is formed through the second support portion; the first magnet extension portion and the second magnet extension portion are respectively disposed in the first relief space and the second relief space.

5. The sound generating device according to claim 1, characterized in that The magnetic circuit system further includes an upper clamping plate, and the upper clamping plate is stacked and fixed on one side of the shaped-edge magnet close to the vibration system.

6. The sound generating device according to claim 1, wherein, The sound generating device further includes a skeleton, and a first through hole and a second through hole are formed through the skeleton and are oppositely arranged. One side of the skeleton close to the vibration system is fixed to the diaphragm, and the first voice coil and the second voice coil are both fixed on the side of the skeleton away from the diaphragm and are respectively arranged around the first through hole and the second through hole; one side of the first central magnet and the second central magnet close to the vibration system respectively passes through the first through hole and the second through hole.

7. The sound generating device according to claim 6, wherein 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 the 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 on the 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, wherein, The sound generating device further includes an elastic support assembly. The skeleton further includes extension portions bent and extended from opposite sides of the skeleton body toward the side close to the magnetic circuit system. One end of the elastic support assembly is fixed to the chassis, and the other end of the elastic support assembly is fixed to the extension portion.

9. The sound generating device according to claim 8, wherein, The elastic support assembly includes an elastic member and an auxiliary diaphragm. One end of the elastic member is fixed to the chassis, the other end of the elastic member is fixed to the extension portion, and the auxiliary diaphragm is attached and fixed to the side of the elastic member away from the vibration system.

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