CN209897260U

CN209897260U - Electroacoustic device

Info

Publication number: CN209897260U
Application number: CN201920467010.4U
Authority: CN
Inventors: 胡洪建; 吴树文
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2020-01-03
Anticipated expiration: 2029-04-04

Abstract

The utility model discloses an electroacoustic device, including the basin frame and be fixed in the vibration system and the magnetic circuit of basin frame respectively, vibration system is including being fixed in the vibrating diaphragm of basin frame, and the elastic support subassembly and the elasticity that set up in the vibrating diaphragm below are hung with the vibrating diaphragm relatively and the interval. Wherein, the elastic support component comprises an elastic part fixed on the basin frame and an auxiliary vibrating diaphragm fixed on one side of the elastic part, which deviates from the vibrating diaphragm. The elastic component comprises a first arm fixed on the basin frame, a second arm fixed on one side of the diaphragm and an elastic arm extending towards the second arm from the first arm and fixed on the second arm, wherein the second arm is fixed on the voice coil, and the elastic arm comprises a bending unit protruding towards the direction close to the diaphragm. The elastic arm comprises a plurality of elastic arms, and a space is formed between the adjacent elastic arms. In the electroacoustic device of this application, bullet arm length increases, the life-span extension. The arrangement of the edge magnetic steel in the interval between the elastic arms improves the driving performance of the magnetic circuit system and improves the sensitivity of the electroacoustic device.

Description

Electroacoustic device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic device especially relates to an electroacoustic device of application on portable electronic product.

[ background of the invention ]

In the process of rapid development of portable devices such as mobile phones, people have increasingly strong requirements on the functionality of products, and especially have more requirements on the sound production performance of products, so that the development of speakers applied to the products is also increasing.

The loudspeaker of the related art comprises a frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the frame; the vibration system comprises a first vibrating diaphragm fixed on the basin frame, a voice coil inserted in the magnetic gap to drive the first vibrating diaphragm to vibrate and sound, and an elastic part fixed on the basin frame and fixed on the basin frame opposite to the first vibrating diaphragm. The elastic piece comprises a first arm fixed on the basin frame, a second arm fixed on one side of the voice coil, a spring arm connected with the first arm and the second arm, wherein the second arm is far away from the vibrating diaphragm.

However, in the speaker structure of the related art, the elastic member is a planar structure, the first arm, the second arm and the elastic arm are in the same plane, and the extension length of the elastic arm is limited, so that the fatigue fracture resistance of the elastic arm is weak, the life of the elastic member is reduced, and the reliability of the electroacoustic device is reduced.

Therefore, there is a need to provide a new technical solution to overcome the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a good reliability, sensitivity height and good electroacoustic device of acoustic performance.

The technical scheme of the utility model as follows: the utility model provides an electroacoustic device, its includes the basin frame and is fixed in respectively the vibration system and the magnetic circuit of basin frame, vibration system is including being fixed in the vibrating diaphragm of basin frame, with relative just elastic support subassembly and the elasticity suspension that the interval set up of vibrating diaphragm in the voice coil loudspeaker voice coil of vibrating diaphragm below, wherein, elastic support subassembly is including being fixed in the elastic component of basin frame, the elastic component is including being fixed in the first arm of basin frame, being fixed in the voice coil loudspeaker voice coil deviates from the second arm of vibrating diaphragm one side and certainly first arm is just right the second arm direction is extended and is fixed in the bullet arm of second arm, it includes to being close to play the arm the convex unit of buckling of vibrating diaphragm direction, it includes a plurality ofly and adjacent to play the arm form the interval between the arm.

Preferably, it is characterized in that: the basin frame is including the relative first lateral wall that sets up and connection the second lateral wall of first lateral wall, first arm is including being fixed in the first fixed arm of first lateral wall and certainly first fixed arm is close to the one end of second lateral wall to the first extension arm that the slope of second lateral wall extends, the second arm is including being fixed in the voice coil loudspeaker voice coil deviates from the second fixed arm of vibrating diaphragm one side and certainly the second fixed arm is close to the one end of second lateral wall to the second extension arm that the second lateral wall extends, it connects and is fixed in to play the arm first fixed arm with the second fixed arm.

Preferably, the bending unit is in the shape of an arc sheet.

Preferably, the bending unit comprises a first protrusion extending from the first fixing arm to the second arm in a bending manner, and a second protrusion extending from the second fixing arm to the first arm in a bending manner, and the elastic arm further comprises an arc-shaped connecting portion connecting the first protrusion and the second protrusion.

Preferably, a first notch is formed at a position of the first arm corresponding to the gap, and the first notch is communicated with the gap.

Preferably, a second notch is formed at a position of the second arm corresponding to the gap, and the gap, the first notch and the second notch are communicated.

Preferably, the magnetic circuit system comprises a magnetic yoke fixed on the basin frame, main magnetic steels fixed on the magnetic yoke, and edge magnetic steels respectively arranged at intervals on two opposite sides of the main magnetic steels and forming magnetic gaps with the main magnetic steels, the voice coil is inserted into the magnetic gaps, and the edge magnetic steels are fixed on the magnetic yoke and extend to between the elastic arms.

Preferably, the elastic support component is further fixed in the elastic component is kept away from the auxiliary diaphragm on one side of the diaphragm, the auxiliary diaphragm is fixed in the first arm is kept away from the first fixed part on one side of the diaphragm, the second arm is kept away from the second fixed part on one side of the diaphragm and the second fixed part is connected with the ring folding part of the first fixed part and the second fixed part, the elastic arm is arranged right at intervals with the ring folding part, and the ring folding part is bent and protruded towards the direction of the elastic component.

Preferably, the auxiliary diaphragm is provided with a through hole at a position corresponding to the side magnetic steel, and the side magnetic steel extends into the gap through the through hole.

Preferably, the through hole corresponds to the space, the first notch and the second notch, and the edge magnetic steel extends into the first notch towards the first arm.

Preferably, the voice coil is in a round-corner rectangular structure, and the elastic support assemblies are symmetrically arranged on two sides of a short shaft of the voice coil.

Preferably, the magnetic circuit system further comprises auxiliary magnetic steels spaced from the main magnetic steel, and the auxiliary magnetic steels are located on two sides of the long axis of the voice coil.

Preferably, an avoiding groove is formed in a concave manner in a direction of one side of the magnetic yoke close to the auxiliary diaphragm and far away from the auxiliary diaphragm, and the position of the avoiding groove corresponds to the position of the auxiliary diaphragm.

Preferably, the avoiding groove is further recessed towards a direction away from the auxiliary diaphragm to form a recessed portion, and the recessed portion corresponds to a position where the amplitude of the auxiliary diaphragm is maximum.

The beneficial effects of the utility model reside in that: because the elastic arm of the elastic part is bent to form a bending unit which protrudes towards the direction close to the vibrating diaphragm, the length of the elastic arm is increased, and the fatigue fracture resistance of the elastic part is improved; moreover, the elastic arms of the elastic part comprise a plurality of elastic arms, and compared with the situation of a single elastic arm, the arrangement of the plurality of elastic arms can further disperse the stress generated on the elastic part when the voice coil vibrates, so that the anti-fracture capability of the elastic part is improved, the service life of the elastic part is further prolonged, and the good reliability of the electroacoustic device in the vibration process is ensured;

in addition, the elastic arm is bent towards the vibrating diaphragm direction, so that the interference between the auxiliary vibrating diaphragm and the elastic part in the vibrating process of the vibrating system is avoided, and the good acoustic performance of the electroacoustic device is ensured; furthermore, the arrangement of the edge magnetic steel between the adjacent elastic arms further improves the driving performance of the magnetic circuit system and improves the sensitivity of the electroacoustic device; meanwhile, the elastic support assembly elastically suspends the voice coil in the magnetic gap of the magnetic circuit system, so that the swinging of the voice coil during vibration is effectively improved, and the reliability of an electroacoustic device is improved.

[ description of the drawings ]

Fig. 1 is a three-dimensional structure diagram of the electroacoustic device of the present invention.

Fig. 2 is an exploded view of the stereo structure of the electroacoustic device of the present invention.

Fig. 3 is a partial sectional view taken along a-a of fig. 1.

Fig. 4 is a combination diagram of a part of the structure of the electroacoustic device of the present invention.

Fig. 5 is an exploded perspective view of the elastic support assembly of the electroacoustic device of the present invention.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

As shown in fig. 1-2. The utility model provides an electroacoustic device 10 includes basin frame 1, is fixed in vibration system 2 and the magnetic circuit 3 of basin frame 1 respectively.

The vibration system 2 comprises a vibrating diaphragm 21 fixed on the frame 1, an elastic supporting component 22 opposite to the vibrating diaphragm 21 and arranged at an interval, and a voice coil 23 elastically suspended below the vibrating diaphragm 21 through the elastic supporting component 22, wherein the elastic supporting component 22 is fixed at one end of the voice coil 23 far away from the vibrating diaphragm 21.

The diaphragm 21 includes a dome 211 at a central position, and a corrugated rim 212 surrounding the dome 211 and fixedly connected to the dome 211. The corrugated rim 212 includes a middle portion 212a connected to the dome 211, an edge portion 212b surrounding the middle portion 212a and extending away from the middle portion 212a, and a fixing portion 212c surrounding the edge portion 212b and extending away from the edge portion 212b and fixed to the frame 1. In other preferred embodiments of the present application, the edge portion 212b may also be curved and convex in a direction away from the voice coil 23.

Fig. 3 is a half of the sectional view taken along the direction a-a of fig. 1, and the omitted half is symmetrical to the sectional view of fig. 3. As shown in fig. 2-5, the resilient support assembly 22 includes a resilient member 24 secured to the frame 1. The elastic member 24 includes a first arm 241 fixed to the frame 1, a second arm 242 fixed to a side of the voice coil 23 away from the diaphragm 21, and an elastic arm 243 extending from the first arm 241 toward a direction opposite to the second arm 242 and fixed to the second arm 242. The elastic arm 243 includes a bending unit 244 bending and protruding toward the diaphragm 21. So make the length of bullet arm obtain extending in the space between limited basin frame and voice coil loudspeaker voice coil, the increase of bullet arm length has further promoted the anti fatigue fracture ability of elastic component, has guaranteed the good reliability of electroacoustic device vibration in-process. Further, the elastic arms 243 include a plurality and a space 245 is formed between adjacent elastic arms 243. The stress that produces the elastic component when the condition of a single bullet arm of a plurality of settings of bullet arm comparison can further disperse the voice coil loudspeaker voice coil vibration to promote the anti fracture ability of elastic component, further improve the life-span of elastic component, guarantee the good reliability of electroacoustic device vibration in-process.

In this embodiment, the bending unit 244 has an arc-shaped sheet shape. Of course, the bending shape of the bending unit is not limited thereto, and all bending shapes capable of increasing the length of the elastic arm belong to the protection scope of the present invention.

Specifically, the frame 1 includes a first side wall 11 and a second side wall 12 connected to the first side wall 11, the first arm 241 includes a first fixing arm 241a fixed to the first side wall 11 and a first extension arm 241b extending from an end of the first fixing arm 241a close to the second side wall 12 in an inclined manner. The second wall 242 includes a second fixing arm 242a fixed to a side of the voice coil 23 facing away from the diaphragm 21, and a second extension arm 242b extending from an end of the second fixing arm 242a near the second side wall 12 toward the second side wall 12. The elastic arm 243 is connected and fixed to the first fixing arm 241a and the second fixing arm 242 a. In the present embodiment, the first fixing arm 241a and the second fixing arm 242a are disposed in parallel with each other.

Further, the bending unit 244 includes a first protrusion 244a bent and extended from the first fixing arm 241a to the second arm 242, and a second protrusion 244b bent and extended from the second fixing arm 242a to the first arm 241. The elastic arm 243 further includes an arc-shaped connection portion 246 connecting the first protrusion 244a and the second protrusion 244 b. Wherein the first and

second protrusions

244a and 244b are curved and convex toward the diaphragm 21. In the present embodiment, the projection of the elastic arm 243 to the diaphragm 21 along the vibration direction of the vibration system 2 is rectangular. However, the projected shape of the elastic arm is not limited to this, and may be other polygonal shapes such as a square, a trapezoid, etc., or an irregular pattern structure.

As shown in fig. 2-5, the elastic support assembly 22 further includes an auxiliary diaphragm 25 fixed to the side of the elastic member 24 away from the diaphragm 21. The auxiliary diaphragm 25 includes a first fixing portion 251 fixed to a side of the first arm 241 away from the diaphragm 21, a second fixing portion 252 fixed to a side of the second arm 242 away from the diaphragm 21, and a corrugated portion 253 connecting the first fixing portion 251 and the second fixing portion 252. The elastic arm 243 is opposite to the folded ring portion 253 at an interval, and the folded ring portion 253 bends and protrudes in a direction away from the elastic piece 24. Since the bending direction of the corrugated portion 253 of the auxiliary diaphragm is opposite to that of the bending unit 244 of the elastic arm 243, the interference between the auxiliary diaphragm 25 and the elastic member 24 during the vibration of the vibration system 2 is better avoided.

The utility model discloses a voice coil loudspeaker voice coil is fillet rectangle structure, and elastic support subassembly 22 symmetry sets up in the minor axis both sides of voice coil loudspeaker voice coil 23. Wherein, the elastic arm 243 of the elastic member 24 comprises a plurality of elastic arms 243, and a space 245 is formed between adjacent elastic arms 243, further, a first gap 247 is formed at a position of the first arm 241 of the elastic member 24 corresponding to the space 245, and the first gap 247 is communicated with the space 245. Preferably, the second arm 242 has a second gap 248 formed at a position corresponding to the space 245, and the space 245, the first gap 247 and the second gap 248 communicate with each other. Thus, the gap 245, the first gap 247 and the second gap 248 separate the elastic members located on the same side of the voice coil 23 as the short axis. In the present embodiment, the elastic member 24 located on the same side of the voice coil 23 as the short shaft is divided into two parts by the space 245, the first gap 247, and the second gap 248, which are communicated with each other.

In the structure, the length of the elastic arm is increased by arranging the bending unit of the elastic arm, so that the fatigue fracture resistance of the elastic part is improved, and the service life of the elastic support assembly is further prolonged; meanwhile, the elastic arms are bent towards the vibrating diaphragm direction, so that the interference of the auxiliary vibrating diaphragm and the elastic part in the vibrating process of the vibrating system is avoided, the good acoustic performance of the electroacoustic device is guaranteed, in addition, the stress generated by the elastic part when the voice coil is vibrated can be further dispersed by comparing the conditions of the single elastic arms in the arrangement of the elastic arms, the fracture resistance of the elastic part is improved, and the good reliability of the electroacoustic device in the vibrating process is guaranteed.

As shown in fig. 2-4, the magnetic circuit system 3 includes a magnetic yoke 31 fixed to the frame 1, a main magnetic steel 32 fixed to the magnetic yoke 31, and side magnetic steels 34 respectively disposed at opposite sides of the main magnetic steel 32 with a gap 33 therebetween and forming a magnetic gap with the main magnetic steel 32. The voice coil 23 is elastically suspended below the diaphragm 21 by the elastic support member 22 and is inserted in the magnetic gap 33. Wherein, the side magnetic steel 34 is fixed to the yoke 31 and extends into the space 245 between the elastic arms 243.

Specifically, in the present embodiment, through holes 254 are formed in the positions of the auxiliary diaphragm 25 corresponding to the side magnetic steels 34, and the side magnetic steels 34 extend into the space 245 through the through holes 254. The through hole 254 corresponds to the space 245, the first gap 247, and the second gap 248, and the side magnetic steel 34 further extends into the first gap 247 toward the direction opposite to the first arm 241. In this embodiment, as preferred, through-hole 254 and interval 245, correspond and the opening size is the same in first breach 247 and the second breach 248 position, so, the elastic support subassembly that is located voice coil 23 homonymy minor axis is all separated for two of symmetry, four elastic support subassembly's symmetrical structure sets up, make the better elasticity of voice coil 23 hang in vibrating diaphragm 21 below, provide more stable supporting effect for voice coil 23, better prevent the horizontal swing of voice coil 23, guarantee the good performance of vibration system, thereby further improve the sound production performance of electroacoustic device. Of course, the number and location of the resilient support members 22 is not so limited; for example, two or four elastic support members 22 may be disposed on two sides of the long axis of the voice coil 23, and the positions and the number thereof may be optimized according to the actual application requirements.

It is worth mentioning that the elastic member 24 is a flexible circuit board electrically connected to the voice coil 23. On the one hand, the voice coil 23 is supported, and on the other hand, external electric signals are introduced into the voice coil 23, so that the problem that the external electric signals are easily broken when being introduced into the voice coil 23 through a lead is solved, and the reliability of the voice coil 23 is improved.

Furthermore, the side magnetic steel 34 is fixed to the yoke 31 and passes through the through hole 254, the space 245 and the first gap 247, and is disposed between the two elastic support members 22 of the short shaft on the same side as the voice coil 23. The position of the basin frame 1 corresponding to the side magnetic steel 34 is provided with a groove 26 which is sunken towards the direction of the diaphragm 21 and is used for avoiding the side magnetic steel 34. On the basis of guaranteeing the good performance of elastic support component 22, this application can make full use of the space between basin frame 1 and voice coil 23 and set up limit magnet steel 34 and promote magnetic circuit 3's drive performance, improve the sensitivity of electroacoustic device 10.

In addition, the magnetic circuit system 3 further includes a secondary magnetic steel 35 spaced apart from the primary magnetic steel 32, and the secondary magnetic steel 35 is located on both sides of the long axis of the voice coil 23. Make magnetic circuit 3 further optimize to set up to five magnet steel magnetic circuit structures, it is better to compare three magnet steel magnetic circuit structures drive performance, and the acoustics performance of electroacoustic device 10 further obtains promoting.

In order to further improve the performance of the magnetic circuit system 3, the magnetic lines of force of the magnetic circuit system 3 are cut by the voice coil 23 as much as possible to form a larger driving force, the magnetic circuit system 3 further comprises a main pole core 36 covering the main magnetic steel 32 and an upper clamping plate 37 fixed on the basin stand 1. Wherein, the upper plate 37 includes a fixing ring 371 fixed on the basin frame 1 and having a ring shape, and an auxiliary pole core 372 respectively extending from the fixing ring 371 to the side magnetic steel 34 and the auxiliary magnetic steel 35, and the auxiliary pole core 372 covers the side magnetic steel 34 and the auxiliary magnetic steel 35 respectively. By arranging the main pole core 36 and the upper clamping plate 37, the magnetic lines of force of the magnetic circuit system 3 are more concentrated, and the magnetic performance of the magnetic circuit system 3 is further optimized, so that the acoustic performance of the electroacoustic device 10 is further improved.

Further, a side of the yoke 31 close to the auxiliary diaphragm 25 is recessed to a direction away from the auxiliary diaphragm 21 to form a relief groove 311, and the position of the relief groove 311 corresponds to the auxiliary diaphragm 25. In addition, the avoiding groove 311 is further recessed toward a direction away from the auxiliary diaphragm 25 to form a recessed portion 312, and the recessed portion 312 corresponds to a position where the amplitude of the auxiliary diaphragm 25 is maximum. Through avoiding the setting of groove 311 and last further depressed part 312 for yoke 31 lets the position for the vibration of supplementary vibrating diaphragm 25, has guaranteed sufficient vibration space under the supplementary vibrating diaphragm large amplitude, and supplementary vibrating diaphragm 25 can not bump with the yoke at the vibration in-process, thereby has further optimized the acoustic performance of electroacoustic device 10.

Compared with the prior art, in the electroacoustic device, the elastic arm of the elastic part is bent to form the bending unit which protrudes towards the direction close to the vibrating diaphragm, so that the length of the elastic arm is increased, and the fatigue fracture resistance of the elastic part is improved, thereby further prolonging the service life of the elastic supporting component; in addition, the elastic arms of the elastic part comprise a plurality of elastic arms, and compared with the situation of a single elastic arm, the arrangement of the elastic arms can further disperse the stress generated on the elastic part when the voice coil vibrates, improve the anti-fracture capability of the elastic part, further improve the service life of the elastic part and ensure the good reliability of the electroacoustic device in the vibration process;

meanwhile, the elastic arm is bent towards the vibrating diaphragm direction, so that the interference between the auxiliary vibrating diaphragm and the elastic part in the vibrating process of the vibrating system is avoided; furthermore, the elastic support assemblies positioned on the same side are divided into two symmetrical elastic support assemblies, the side magnetic steel is arranged between the adjacent elastic support assemblies, and the magnetic circuit system is optimized and set to be a five-magnetic-steel magnetic circuit structure by matching with the auxiliary magnetic steel on the other two sides of the voice coil, so that the driving performance is better compared with that of a three-magnetic-steel magnetic circuit structure, and the acoustic performance of an electroacoustic device is further improved; in addition, the avoidance groove and the concave part on the magnetic yoke further provide vibration avoidance for the auxiliary vibrating diaphragm, so that enough vibration space under large amplitude of the auxiliary vibrating diaphragm is ensured, the auxiliary vibrating diaphragm cannot collide with the magnetic yoke in the vibration process, and good acoustic performance of the electroacoustic device is ensured; further, the elastic support subassembly of this application hangs voice coil loudspeaker voice coil elasticity in magnetic gap of magnetic circuit, provides more stable supporting effect for the voice coil loudspeaker voice coil, the better lateral vibration who prevents the voice coil loudspeaker voice coil to the reliability of electroacoustic device has further been promoted.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. The utility model provides an electroacoustic device, its includes the basin frame and is fixed in respectively the vibration system and the magnetic circuit of basin frame, vibration system including be fixed in the vibrating diaphragm of basin frame, with relative just elasticity supporting component and the elasticity suspension that the interval set up of vibrating diaphragm in the voice coil loudspeaker voice coil of vibrating diaphragm below, its characterized in that: the elastic support assembly comprises a fixing part and an elastic part, the elastic part comprises a fixing part and is fixed on a first arm of the basin frame, a fixing part and a voice coil, the voice coil deviates from a second arm on one side of the vibrating diaphragm and is right opposite to the first arm in the direction of the second arm, the elastic arm extends and is fixed on the elastic arm of the second arm, the elastic arm comprises a plurality of bending units close to the direction of the vibrating diaphragm, and the elastic arm comprises a plurality of bending units and is adjacent to the bending units and forms a gap between the elastic arms.

2. The electroacoustic device of claim 1, wherein: the basin frame is including the relative first lateral wall that sets up and connection the second lateral wall of first lateral wall, first arm is including being fixed in the first fixed arm of first lateral wall and certainly first fixed arm is close to the one end of second lateral wall to the first extension arm that the slope of second lateral wall extends, the second arm is including being fixed in the voice coil loudspeaker voice coil deviates from the second fixed arm of vibrating diaphragm one side and certainly the second fixed arm is close to the one end of second lateral wall to the second extension arm that the second lateral wall extends, it connects and is fixed in to play the arm first fixed arm with the second fixed arm.

3. The electroacoustic device of claim 2, wherein: the bending unit is arc-shaped and flaky.

4. The electroacoustic device of claim 3, wherein: the unit of buckling includes certainly first arch and certainly the second fixed arm to the second arm direction is buckled and is extended first arch and certainly the second fixed arm to the first arm direction is buckled and is extended the second arch, the bullet arm still including connecting first arch with the bellied arc connecting portion of second.

5. The electroacoustic device of claim 1, wherein: the first arm forms a first gap corresponding to the position of the interval, and the first gap is communicated with the interval.

6. The electroacoustic device of claim 5, wherein: and a second gap is formed at the position of the second arm corresponding to the gap, and the gap, the first gap and the second gap are communicated.

7. The electroacoustic device of claim 6, wherein: the magnetic circuit system comprises a magnetic yoke fixed on the basin frame, main magnetic steel fixed on the magnetic yoke and edge magnetic steel which is arranged on two opposite sides of the main magnetic steel at intervals and forms a magnetic gap with the main magnetic steel respectively, the voice coil is inserted into the magnetic gap, and the edge magnetic steel is fixed on the magnetic yoke and extends to the position between the elastic arms.

8. The electroacoustic device of claim 7, wherein: the elastic support component further comprises an auxiliary vibrating diaphragm fixed on one side of the vibrating diaphragm and kept away from the elastic piece, the auxiliary vibrating diaphragm comprises a first arm, a first fixing portion and a second fixing portion, the first fixing portion is fixed on one side of the vibrating diaphragm, the second arm is kept away from the second fixing portion on one side of the vibrating diaphragm, the first fixing portion is connected with a ring folding portion of the second fixing portion, the elastic arm is arranged opposite to the ring folding portion in a spaced mode, and the ring folding portion is bent and protruded towards the direction of the elastic piece.

9. The electroacoustic device of claim 8, wherein: the auxiliary vibrating diaphragm is provided with a through hole corresponding to the position of the edge magnetic steel, and the edge magnetic steel extends into the gap through the through hole.

10. The electroacoustic device of claim 9, wherein: the through holes correspond to the intervals, the first gaps and the second gaps, and the edge magnetic steel extends into the first gaps towards the first arm.

11. The electroacoustic device of claim 7, wherein: the voice coil is round corner rectangle structure, the elastic support subassembly symmetry set up in the minor axis both sides of voice coil loudspeaker voice coil.

12. The electroacoustic device of claim 11, wherein: the magnetic circuit system further comprises auxiliary magnetic steels arranged at intervals with the main magnetic steel, and the auxiliary magnetic steels are located on two sides of the long shaft of the voice coil.

13. The electroacoustic device of claim 8, wherein: and an avoiding groove is formed in the magnetic yoke in a concave manner in the direction away from the auxiliary diaphragm, and the position of the avoiding groove corresponds to that of the auxiliary diaphragm.

14. The electro-acoustic device of claim 13, wherein: the avoidance groove is further recessed towards the direction far away from the auxiliary diaphragm to form a recessed part, and the recessed part corresponds to the maximum amplitude position of the auxiliary diaphragm.