WO2021128333A1

WO2021128333A1 - Sound production device

Info

Publication number: WO2021128333A1
Application number: PCT/CN2019/129404
Authority: WO
Inventors: 宋威; 张帆; 金鑫
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-07-01

Abstract

The present invention provides a sound production device, comprising a basin frame, a vibration system and a magnetic circuit system; the vibration system comprises an upper vibrating diaphragm, a lower vibrating diaphragm, a voice coil, a framework and an isolation vibrating diaphragm; the upper vibrating diaphragm is fixed on one side, away from the magnetic circuit system, of the basin frame; the lower vibrating diaphragm is annular and is provided, in a spaced manner, around the magnetic circuit system, the lower vibrating diaphragm and the upper vibrating diaphragm are oppositely spaced apart, and an outer peripheral side of the lower vibrating diaphragm is fixed to the basin frame; the voice coil is connected to one side, close to the magnetic circuit system, of the upper vibrating diaphragm, and is inserted into a magnetic gap; the framework is annular and is provided, in a spaced manner, around the magnetic circuit system, the framework is respectively connected to the voice coil and the lower vibrating diaphragm, and the voice coil drives the upper vibrating diaphragm to vibrate, and drives the framework so as to drive the lower vibrating diaphragm to vibrate; the isolation vibrating diaphragm is annular and is provided, in a spaced manner, around the magnetic circuit system, the isolation vibrating diaphragm is provided, in a spaced manner, between the upper vibrating diaphragm and the lower vibrating diaphragm, an outer peripheral side of the isolation vibrating diaphragm is connected to the basin frame, and an inner peripheral side of the isolation vibrating diaphragm is connected to the framework. Compared with the related art, the sound production device of the present invention has a higher acoustic loudness level and better acoustic performance.

Description

Sound device

Technical field

The invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to electronic sound box products.

Background technique

The related art sound generating device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap. The magnetic circuit system drives the vibration system to vibrate and emit sound. The vibration system includes a frame fixed to the basin. The frame is used for vibrating and producing the diaphragm, the dome of the diaphragm is attached to the skeleton on the side close to the magnetic circuit system, and the sound inserted in the magnetic gap and connected with the skeleton to drive the diaphragm to vibrate ring.

technical problem

However, in the related art sound generating device, the vibration system and the magnetic circuit system are stacked up and down. In the sound generating device of the same height, the structure of the magnetic circuit system is limited, thereby limiting the BL value of the magnetic field; The sounding device has only one diaphragm structure, and the effective vibration area (SD) of the diaphragm is small, thereby limiting the loudness of the sounding device.

Therefore, it is necessary to provide a new sound generating device to solve the above technical problems.

Technical solutions

The purpose of the present invention is to provide a sounding device with greater loudness and better acoustic performance.

In order to achieve the above objective, the present invention provides a sound generating device, which includes a basin frame, a vibration system respectively supported on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap; The vibration system includes:

An upper diaphragm, the upper diaphragm is fixed on the side of the basin frame away from the magnetic circuit system;

The lower diaphragm, the lower diaphragm is ring-shaped and arranged at intervals around the magnetic circuit system, the lower diaphragm and the upper diaphragm are arranged opposite to each other, and the outer peripheral side of the lower diaphragm is fixed to the basin frame;

A voice coil, the voice coil is connected to a side of the upper diaphragm close to the magnetic circuit system, and is inserted in the magnetic gap to drive the upper diaphragm and the lower diaphragm to vibrate and produce sound;

The frame is ring-shaped and arranged around the magnetic circuit system at intervals, and the frame is connected to the voice coil and the lower diaphragm respectively, and the voice coil drives the upper diaphragm to vibrate and drives the A skeleton to drive the lower diaphragm to vibrate; and,

Isolation diaphragm, the isolation diaphragm is ring-shaped and arranged at intervals around the magnetic circuit system, the isolation diaphragm is arranged at intervals between the upper diaphragm and the lower diaphragm, the isolation diaphragm The outer peripheral side is connected with the basin frame, and the inner peripheral side of the isolation diaphragm is connected with the frame.

Preferably, the skeleton includes a skeleton body in a ring shape arranged around the magnetic circuit system at intervals, and a skeleton extension wall that is bent from the skeleton body to the magnetic circuit system and extends into the magnetic gap; The two opposite sides of the frame body are respectively connected with the isolation diaphragm and the lower diaphragm, and the frame extension wall is connected with the voice coil.

Preferably, the frame extension wall includes a first wall bent and extended from the frame body and an arc-shaped second wall bent and extended from the first wall; the voice coil has a rectangular shape with rounded corners. In a ring structure, the second wall is attached to the rounded corners of the outer circumference of the voice coil.

Preferably, the first wall includes four and is arranged around the voice coil at intervals, and each of the first walls is bent and extended to form a second wall, and the four second walls are respectively provided on the Describe the four rounded corners of the voice coil.

Preferably, the lower diaphragm includes a ring-shaped lower folded ring portion, a lower vibrating portion bent and extended from the inner peripheral side of the lower folded ring portion, and a lower vibration portion bent and extended from the outer peripheral side of the lower bent ring portion. The lower fixing part; the lower vibrating part is connected with the frame body, and the lower fixing part is fixed to the side of the basin frame away from the upper diaphragm.

Preferably, the lower diaphragm further includes a ring-shaped lower spherical top attached to the lower vibrating portion, the lower vibrating portion is connected to the skeleton body through the lower spherical top, and the isolation diaphragm is connected to the The tops of the lower spheres are arranged directly opposite each other, and the width of the isolation diaphragm in the vibration direction perpendicular to the upper diaphragm is smaller than the width of the tops of the lower spheres.

Preferably, the skeleton body includes a body wall, a first reinforcement wall bent and extended from an end of the body wall close to the isolation diaphragm in a direction perpendicular to the vibration direction of the upper diaphragm, and a first reinforcement wall formed by the body wall. A second reinforcing wall that is bent and extended along an end close to the lower diaphragm perpendicular to the vibration direction, the first reinforcing wall and the second reinforcing wall are respectively located on two different sides of the main body wall; The first reinforcement wall is connected to the isolation diaphragm, and the second reinforcement wall is connected to the lower vibrating part.

Preferably, the upper diaphragm includes a ring-shaped upper folded ring portion, an upper vibrating portion bent and extended from the inner circumferential side of the upper folded ring portion, and an upper vibration portion bent and extended from the outer circumferential side of the upper folded ring portion The upper fixing part is fixed to the side of the basin frame away from the lower diaphragm; the voice coil is connected to the upper vibrating part.

Preferably, the upper folding ring portion and the lower folding ring portion are arranged directly opposite to each other.

Preferably, the upper folding ring portion has an arc structure formed by recessing in a direction away from the lower folding ring portion, and the lower folding ring portion has an arc structure formed by recessing in a direction away from the upper folding ring portion.

Preferably, the basin frame includes a bottom wall that fixedly supports the magnetic circuit system, an annular side wall bent and extended from the periphery of the bottom wall, and a side wall extending from the side wall in a direction close to the magnetic circuit system The outer peripheral side of the lower diaphragm is fixed to the side wall and the lower diaphragm is spaced from the bottom wall, and the outer peripheral side of the upper diaphragm is fixed to the side One end of the wall away from the bottom wall, and the outer peripheral side of the isolation diaphragm is fixed to the supporting wall.

Preferably, the side wall includes a first side wall bent and extended from the periphery of the bottom wall and a second side wall extending from the first side wall in a direction away from the bottom wall. The second side wall is bent and extended; the outer circumferential side of the upper diaphragm is fixed to an end of the second side wall away from the bottom wall, and the outer circumferential side of the lower diaphragm is fixed to the first side Between the wall and the second side wall.

Preferably, the magnetic circuit system includes a yoke supported on the bottom wall, a main magnet fixed to the yoke, and an auxiliary magnet surrounding the main magnet, the auxiliary magnet and the The main magnetic steel is spaced to form the magnetic gap; the secondary magnetic steel is provided with a relief opening, and the upper skeleton extends into the magnetic gap through the relief opening and is connected with the voice coil.

Preferably, the auxiliary magnet includes a first auxiliary magnet arranged at intervals on opposite sides of the main magnet and a second auxiliary magnet arranged at intervals on the other opposite sides of the main magnet. The first auxiliary magnetic steel and the second auxiliary magnetic steel are spaced apart to form the relief opening.

Beneficial effect

Compared with the related art, in the sound generating device of the present invention, the vibration system includes an upper diaphragm and a lower diaphragm for vibrating and sounding respectively. The upper diaphragm is connected to the voice coil, and the voice coil is connected to the lower diaphragm through a skeleton. The relationship makes the upper diaphragm and the lower diaphragm form a linkage. During the vibration process, the voice coil drives the upper diaphragm to vibrate and produce sound, and at the same time drives the skeleton to drive the lower diaphragm to vibrate and produce sound, that is, in the above structure, the upper diaphragm and the lower diaphragm Together, the double diaphragm structure of the vibration system is formed, which effectively increases the effective vibration area (SD) of the diaphragm of the vibration system, improves the sounding loudness of the sounding device, and makes the acoustic performance of the sounding device excellent.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention;

2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention;

Figure 3 is an exploded view of the skeleton three-dimensional structure of the sound generating device of the present invention;

4 is a schematic diagram of the assembly of a part of the structure of the vibration system and the magnetic circuit system of the sound device of the present invention;

Figure 5 is an exploded view of the three-dimensional structure of Figure 4;

Figure 6 is a cross-sectional view taken along line A-A in Figure 1;

Fig. 7 is a cross-sectional view taken along the line B-B in Fig. 1.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

1-7, the present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 respectively supported on the basin frame 1, and an upper cover plate 4. The magnetic circuit system 3 has a magnetic gap 30, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.

The vibration system 2 includes an upper diaphragm 21, a lower diaphragm 22, a voice coil 23, a skeleton 24 and an isolation diaphragm 25. Wherein, the upper diaphragm 21, the isolation diaphragm 25, and the lower diaphragm 22 are sequentially spaced from top to bottom.

The outer peripheral side of the upper diaphragm 21 is fixed to the side of the basin frame 1 away from the magnetic circuit system 3. The upper diaphragm 21 and the basin frame 1 jointly enclose a receiving space 10.

The side of the upper diaphragm 21 away from the receiving space 10 communicates with the outside and serves as an upper front cavity 201 where the upper diaphragm 21 emits sound; specifically, the upper cover plate 4 is fixed to the basin The side of the frame 1 away from the magnetic circuit system 3, the outer peripheral side of the upper diaphragm 21 is clamped and fixed between the basin frame 1 and the upper cover plate 4, and the upper diaphragm 21, The basin frame 1 and the upper cover plate 4 jointly enclose the upper front cavity 201, and the upper cover plate 4 is provided with a sounding opening 40 penetrating therethrough, and the sounding opening 40 connects the upper front cavity 201 with Connect with the outside world to achieve sound.

In this embodiment, the upper diaphragm 21 includes an upper folding ring portion 211 having a ring shape, an upper vibrating portion 212 bent and extending from the inner peripheral side of the upper folding ring portion 211, and an upper vibration portion 212 formed by the upper folding ring portion 211. The upper fixing portion 213 is bent and extended on the outer peripheral side of the 211, and the upper fixing portion 213 is fixed to the side of the basin frame 1 away from the lower diaphragm 22, that is, the upper fixing portion 213 is sandwiched and fixed to the Between the basin frame 1 and the upper cover 4, the upper vibrating part 212 is used for vibrating and sounding.

The lower diaphragm 22 is ring-shaped and arranged around the magnetic circuit system 3 at intervals.

The lower diaphragm 22 is opposite to the upper diaphragm 21 and is located in the receiving space 10, and the outer peripheral side of the lower diaphragm 22 is fixed to the side of the frame 1 away from the upper diaphragm 21 . .

Specifically, the lower diaphragm 22 includes a ring-shaped lower folded ring portion 221, a lower vibrating portion 222 bent and extended from the inner peripheral side of the lower folded ring portion 221, and an outer periphery formed by the folded ring portion 221. The lower fixing portion 223 is bent and extended on the side; the lower fixing portion 223 is fixed to the side of the basin frame 1 away from the upper diaphragm 21, and the lower vibrating portion 222 is connected to the frame 24.

In this embodiment, the upper folding ring portion 211 and the lower folding ring portion 221 are arranged directly opposite to each other. More preferably, the upper folding ring portion 211 has an arc-shaped structure formed by recessing in a direction away from the lower folding ring portion 221, and the lower folding ring portion 221 is formed by being recessed in a direction away from the upper folding ring portion 211. Curved structure. This structure effectively utilizes the height space of the sound emitting device 100, so that the upper diaphragm 21 and the lower diaphragm 22 have a larger vibration space and better vibration performance.

The voice coil 23 is inserted in the magnetic gap 30 and connected to the upper diaphragm 21 on the side close to the magnetic circuit system 3 for driving the upper diaphragm 21 and the lower diaphragm 22 Vibration and sound; specifically, the end of the voice coil 23 away from the magnetic circuit system 3 is connected to the upper vibrating portion 212 to drive the upper diaphragm 21 to vibrate, and its end close to the magnetic circuit system 3 is inserted In the magnetic gap 30 and connected to the frame 24, the frame 24 drives the lower diaphragm 22 to vibrate. In the above structure, the upper diaphragm 21 and the lower diaphragm 22 together form a double-diaphragm vibration sounding structure, which effectively increases the effective vibration area (SD) of the vibration system 2 and improves the sounding loudness of the sounding device 100, thereby making sound The acoustic performance of the device 100 is excellent. In addition, while increasing the effective vibration area (SD) of the diaphragm of the sound emitting device 100, the lower diaphragm 22 is arranged around the magnetic circuit system 3, so that the lower diaphragm 22 is arranged in the housing. In the space 10, the space utilization rate inside the sounding device 100 is effectively improved, that is, when the effective vibration area (SD) of the diaphragm of the sounding device 100 is the same, the size of the sounding device 100 can be made smaller, which is beneficial to miniaturization. Chemical development.

The skeleton 24 has a ring shape, and the skeleton 24 is located in the receiving space 10 and is arranged at intervals around the magnetic circuit system 3.

The skeleton 24 is respectively connected to the voice coil 23 and the lower diaphragm 22. The voice coil 23 drives the upper diaphragm 21 to vibrate and produce sound, and at the same time drives the skeleton 24 to drive the lower diaphragm 22 to vibrate Sound, so as to realize the double-diaphragm vibration and sound structure.

The isolation diaphragm 25 is ring-shaped and arranged around the magnetic circuit system 3 at intervals.

The isolation diaphragm 25 is arranged at intervals between the upper diaphragm 21 and the lower diaphragm 22, the outer peripheral side of the isolation diaphragm 25 is connected to the basin frame 1, and the inner portion of the isolation diaphragm 25 The peripheral side is connected to the frame 24. More preferably, the upper vibrating portion 212 and the isolation diaphragm 25 are arranged directly opposite to each other and spaced apart.

The lower diaphragm 22, the frame 24, the isolation diaphragm 25, and the basin frame 1 jointly divide the receiving space 10 into a lower front cavity 202 for the lower diaphragm 22 to emit sound and The rear cavity 101 shared by the upper diaphragm 21 and the lower diaphragm 22. The basin frame 1 is provided with a sound hole 120 penetrating through it. The sound hole 120 connects the lower front cavity 202 with the outside to achieve sound. The lower diaphragm 22 and the upper diaphragm 21 share the same After the cavity 101.

That is to say, the isolation diaphragm 25 isolates the rear cavity 101 and the lower front cavity 202 from the receiving space 10, thereby avoiding acoustic short circuit between the rear cavity 101 and the lower front cavity 202.

In this embodiment, the skeleton 24 includes a skeleton body 241 and a skeleton extension wall 242.

The skeleton body 241 is ring-shaped and arranged around the magnetic circuit system 3, and the skeleton body 241 is spaced from the magnetic circuit system 3; the skeleton body 241 is on opposite sides of the vibration direction of the vibration system 2 respectively Connected to the isolation diaphragm 25 and the lower vibration portion 222 of the lower diaphragm 22, the isolation diaphragm 25, the skeleton body 241, the lower diaphragm 22 and the basin frame 1 jointly The receiving space 10 is divided into the rear cavity 101 and the lower front cavity 202.

Further, the skeleton body 241 includes a body wall 2411, a first reinforcement wall 2412 extending from the end of the body wall 2411 close to the isolation diaphragm 25 in a direction perpendicular to the vibration direction of the upper diaphragm 21, And a second reinforcing wall 2413 bent and extending perpendicular to the vibration direction from the end of the main body wall 2411 close to the lower diaphragm 22, the first reinforcing wall 2412 and the inner circumference of the isolating diaphragm 25 Side connection, the second reinforcement wall 2413 is connected to the lower vibrating portion 222 of the lower diaphragm 22.

Due to the arrangement of the first reinforcement wall 2412 and the second reinforcement wall 2413, the combined area of the frame body 241, the isolation diaphragm 25 and the lower vibrating portion 222 is effectively increased, that is, the frame body is effectively increased. The strength of the connection between the 241 and the isolation diaphragm 25 and the lower vibration portion 222 further improves the vibration reliability.

In this embodiment, the first reinforcement wall 2412 and the second reinforcement wall 2413 are respectively located on two different sides of the main body wall 2411.

More preferably, the lower diaphragm 22 further includes a ring-shaped lower dome 224 attached to the lower vibrating portion 222, and the lower vibrating portion 222 is connected to the skeleton body 241 through the lower dome 224 , The placement of the lower dome 224 effectively improves the vibration reliability of the lower diaphragm 22; more preferably, the isolation diaphragm 25 and the lower dome 224 are arranged directly opposite each other, and the isolation diaphragm 25 is arranged along the The width perpendicular to the vibration direction of the upper diaphragm 21 is smaller than the width of the lower spherical top 224. This structural arrangement prevents the excessively large width of the isolation diaphragm 25 from causing loss of the effective vibration area SD of the lower diaphragm 22 and affecting the acoustic performance.

The skeleton extension wall 242 is bent from the skeleton body 241 toward the magnetic circuit system 3 to extend into the magnetic gap 30 and is connected to the voice coil 23.

Further, the skeleton extension wall 242 includes a first wall 2421 and a second wall 2422; the first wall 2421 is bent from the skeleton body 241 toward the magnetic circuit system 3 and extends into the magnetic gap 30; The second wall 242 has an arc shape, which is bent and extended from the first wall 2421 and abuts against the voice coil 23.

It is worth mentioning that the structure of the voice coil is not limited. For example, in this embodiment, the voice coil 23 has a rectangular ring structure with rounded corners, and the second wall 2422 is attached to the voice coil. The rounded corners of the outer circumference of the ring 23.

Preferably, the first walls 2421 include four and are arranged around the voice coil 23 at intervals, and each of the first walls 2421 is bent and extended to form a second wall 2422, that is, a total of four The second wall 2422 and the four second walls 2422 are respectively provided at the four rounded corners of the voice coil. The above structure symmetrically supports the voice coil 23, the support is more stable, and the vibration reliability is better.

In this embodiment, the basin frame 1 includes a bottom wall 11 that fixedly supports the magnetic circuit system 3, a ring-shaped side wall 12 extending from the periphery of the bottom wall 11, and a side wall extending from the side wall 12 to An annular support wall 13 extending in the direction close to the magnetic circuit system 3.

The outer peripheral side of the lower diaphragm 22 is fixed to the side wall 12, specifically, the lower fixing portion 223 of the lower diaphragm 22 is fixed to the side wall 12, and makes the lower diaphragm 22 and the The bottom wall 11 is arranged at intervals to provide a vibration space for the lower diaphragm 22.

The outer peripheral side of the upper diaphragm 21 is fixed to an end of the side wall 12 away from the bottom wall 11, specifically, the upper fixing portion 213 of the upper diaphragm 21 is fixed to the side wall 12 away from the bottom wall 11. Said one end of the bottom wall 11.

The sound hole 120 penetrates the side wall 12 and is located on the side of the supporting wall 13 close to the bottom wall 11.

Specifically, the side wall 12 includes a first side wall 121 bent and extended from the periphery of the bottom wall 11 and a second side wall 122 extending from the first side wall 121 in a direction away from the bottom wall 11, The supporting wall 13 is bent and extended from the second side wall 122.

The outer circumferential side of the upper diaphragm 21, that is, the upper fixing portion 213 is fixed to the end of the second side wall 122 away from the bottom wall 11; the outer circumferential side of the lower diaphragm 22, that is, the lower fixing portion 223 It is sandwiched and fixed between the first side wall 121 and the second side wall 122. The sound hole 120 penetrates the second side wall 122 and is located on the side of the supporting wall 13 close to the bottom wall 11.

The outer peripheral side of the isolation diaphragm 25 is fixed to the supporting wall 13 of the basin frame 1. At this time, the lower diaphragm 22, the skeleton 24, the isolation diaphragm 25, and the second side wall 122 collectively enclose the lower front cavity 202 for the lower diaphragm 22 to emit sound.

The magnetic circuit system 3 includes a magnetic yoke 31 supported on the bottom wall 11, a main magnetic steel 32 fixed to the magnetic yoke 31 and a secondary magnetic steel 33 surrounding the main magnetic steel 32 respectively. The secondary magnet 33 is spaced from the main magnet 32 to form the magnetic gap 30.

The auxiliary magnet 33 is provided with a relief opening 330, and the skeleton 24 extends into the magnetic gap 30 through the relief opening 330 and is connected with the voice coil 23. Specifically, the first wall 2412 of the skeleton 24 extends into the magnetic gap 30 through the relief opening 330.

More preferably, the auxiliary magnet 33 includes first auxiliary magnets 331 arranged at intervals on opposite sides of the main magnet 32 and second auxiliary magnets 331 arranged at intervals on the other opposite sides of the main magnet 32. 332. The adjacent first secondary magnet 331 and the second secondary magnet 332 are arranged at intervals to form the relief opening 330.

Compared with the related art, in the sound generating device of the present invention, the vibration system is provided with an upper diaphragm and a lower diaphragm for vibrating sound. The upper diaphragm and the lower diaphragm together form a double diaphragm structure of the vibration system, so that the upper diaphragm The diaphragm and the lower diaphragm emit sound through the upper front cavity and the lower front cavity respectively and share the same rear cavity. This structure effectively increases the effective vibration area (SD) of the diaphragm of the vibration system, improves the sounding loudness of the sounding device, and makes the sound The acoustic performance of the device is excellent.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A sound-producing device, comprising a basin frame, a vibration system respectively supported on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap, characterized in that the vibration system include:

An upper diaphragm, the upper diaphragm is fixed on the side of the basin frame away from the magnetic circuit system;

The lower diaphragm, the lower diaphragm is ring-shaped and arranged at intervals around the magnetic circuit system, the lower diaphragm and the upper diaphragm are arranged opposite to each other, and the outer peripheral side of the lower diaphragm is fixed to the basin frame;

A voice coil, the voice coil is connected to a side of the upper diaphragm close to the magnetic circuit system, and is inserted in the magnetic gap to drive the upper diaphragm and the lower diaphragm to vibrate and produce sound;

The frame is ring-shaped and arranged around the magnetic circuit system at intervals, and the frame is connected to the voice coil and the lower diaphragm respectively, and the voice coil drives the upper diaphragm to vibrate and simultaneously drives the The frame to drive the lower diaphragm to vibrate; and,

Isolation diaphragm, the isolation diaphragm is ring-shaped and arranged at intervals around the magnetic circuit system, the isolation diaphragm is arranged at intervals between the upper diaphragm and the lower diaphragm, the isolation diaphragm The outer peripheral side is connected with the basin frame, and the inner peripheral side of the isolation diaphragm is connected with the frame.
The sounding device according to claim 1, wherein the frame includes a frame body in a ring shape arranged around the magnetic circuit system at intervals, and the frame body is bent and extended to the magnetic circuit system. The skeleton extension wall in the magnetic gap; the opposite sides of the skeleton body are respectively connected with the isolation diaphragm and the lower diaphragm, and the skeleton extension wall is connected with the voice coil.
The sounding device according to claim 2, wherein the frame extension wall comprises a first wall bent and extended from the frame body and a second wall bent and extended from the first wall and in an arc shape The voice coil is a rectangular ring structure with rounded corners, and the second wall is attached to the rounded corners on the outer peripheral side of the voice coil.
4. The sound emitting device according to claim 3, wherein the first wall comprises four and is arranged around the voice coil at intervals, and each of the first walls is bent and extended to form the second wall, The four second walls are respectively arranged at the four round corners of the voice coil.
The sounding device according to claim 2, wherein the lower diaphragm includes a ring-shaped lower ring portion, a lower vibration portion bent and extended from the inner peripheral side of the lower ring portion, and The outer peripheral side of the lower folding ring portion is a lower fixing portion that is bent and extended; the lower vibrating portion is connected to the frame body, and the lower fixing portion is fixed on the side of the basin frame away from the upper diaphragm.
The sounding device according to claim 5, wherein the lower diaphragm further comprises a ring-shaped lower spherical top attached to the lower vibrating part, and the lower vibrating part passes through the lower spherical top and the The frame body is connected, the isolation diaphragm and the top of the lower sphere are arranged directly opposite each other, and the width of the isolation diaphragm in the vibration direction perpendicular to the upper diaphragm is smaller than the width of the top of the lower sphere.
The sounding device according to claim 5 or 6, wherein the skeleton body comprises a body wall, and an end of the body wall close to the isolation diaphragm is bent along a vibration direction perpendicular to the upper diaphragm An extended first reinforcing wall, and a second reinforcing wall bent and extending from an end of the main body wall close to the lower diaphragm in a direction perpendicular to the vibration direction, the first reinforcing wall and the second reinforcing wall They are respectively located on different sides of the body wall; the first reinforcement wall is connected to the isolation diaphragm, and the second reinforcement wall is connected to the lower vibrating part.
The sound generating device according to claim 5, wherein the upper diaphragm includes an upper folded ring portion having a ring shape, an upper vibrating portion bent and extended from the inner peripheral side of the upper folded ring portion, and The upper fixing portion is bent and extended on the outer circumference of the upper ring portion, and the upper fixing portion is fixed on the side of the basin frame away from the lower diaphragm; the voice coil is connected to the upper vibrating portion.
8. The sound generating device according to claim 8, wherein the upper folding ring portion and the lower folding ring portion are arranged directly opposite to each other.
The sounding device according to claim 9, wherein the upper folding ring portion is in an arc-shaped structure formed by recessing in a direction away from the lower folding ring portion, and the lower folding ring portion is in a direction away from the upper folding ring. An arc-shaped structure formed by a recess in the direction of the ring.
The sounding device according to claim 10, wherein the basin frame includes a bottom wall that fixedly supports the magnetic circuit system, a ring-shaped side wall bent and extended from the periphery of the bottom wall, and a side wall formed by the side The wall is a ring-shaped support wall extending in the direction close to the magnetic circuit system; the outer peripheral side of the lower diaphragm is fixed to the side wall so that the lower diaphragm is spaced from the bottom wall, and the upper The outer peripheral side of the diaphragm is fixed to an end of the side wall away from the bottom wall, and the outer peripheral side of the isolation diaphragm is fixed to the supporting wall.
The sounding device according to claim 11, wherein the side wall comprises a first side wall bent and extended from the periphery of the bottom wall and a first side wall extending from the first side wall in a direction away from the bottom wall. The second side wall, the support wall is bent and extended by the second side wall; the outer peripheral side of the upper diaphragm is fixed to the end of the second side wall away from the bottom wall, and the lower diaphragm The outer peripheral side is sandwiched and fixed between the first side wall and the second side wall.
The sounding device according to claim 12, wherein the magnetic circuit system includes a yoke supported on the bottom wall, a main magnet fixed to the yoke, and an auxiliary magnet surrounding the main magnet. The magnetic steel, the secondary magnetic steel is separated from the main magnetic steel to form the magnetic gap; the secondary magnetic steel is provided with a relief opening, and the upper skeleton extends into the magnetic gap through the relief opening and Connect with the voice coil.
The sounding device according to claim 13, wherein the auxiliary magnets include first auxiliary magnets spaced apart on opposite sides of the main magnet and spaced apart on the other opposite sides of the main magnet. The second secondary magnetic steel, the adjacent first secondary magnetic steel and the second secondary magnetic steel are spaced apart to form the relief opening.