WO2022067988A1

WO2022067988A1 - Sound production device

Info

Publication number: WO2022067988A1
Application number: PCT/CN2020/128280
Authority: WO
Inventors: 宋威; 肖波; 令狐荣林; 孔晨亮; 章统
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: 2020-09-30
Filing date: 2020-11-12
Publication date: 2022-04-07
Also published as: CN213661916U

Abstract

The utility model provides a sound production device, comprising a vibration system and a magnetic circuit system. The vibration system comprises a diaphragm, a voice coil configured to drive the diaphragm to vibrate and produce sound, and a framework configured to fix the diaphragm to the voice coil. The framework comprises an annular framework body fixed to the diaphragm, an annular framework extension configured to bend and extend from the end of the framework body away from the diaphragm toward the voice coil, a framework fixing portion configured to bend and extend from the framework extension and fixed to the voice coil, and a framework flange configured to bend and extend from an inner periphery of the framework extension. The magnetic circuit system comprises a magnetic yoke, primary magnetic steel fixed to the magnetic yoke, and secondary magnetic steel surrounding the primary magnetic steel. The secondary magnetic steel and the primary magnetic steel are spaced apart to form a magnetic gap, and the voice coil is inserted in the magnetic gap. The framework flange and the framework fixing portion jointly enclose a hollow area, and the voice coil, the primary magnetic steel and the secondary magnetic steel are provided in the hollow area. Compared with the prior art, the sound production device is high in reliability and good in high-frequency performance.

Description

sound device

technical field

The utility model relates to the field of electro-acoustic conversion, in particular to a sound-emitting device used in electronic sound box products.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is the high-quality music function. Therefore, sound-generating devices for playing sound are widely used in smart mobile devices.

The sound-generating device of the related art includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound. A voice coil and a skeleton for fixing the diaphragm to the voice coil, the skeleton includes a skeleton body in a ring shape and fixed on the diaphragm, from the end of the skeleton body away from the diaphragm to the a ring-shaped skeleton extension part bent and extended in the direction of the voice coil and a skeleton fixing part bent and extended by the skeleton extension part and fixed to the voice coil; the skeleton extension part and the skeleton fixing part together enclose a hollow space area, which together form a hollow area, and the voice coil is arranged in the hollow area.

However, when the voice coil of the related art sound-generating device drives the diaphragm to vibrate and emit sound, since the voice coil repeatedly moves back and forth in the vibration direction of the vibration, the skeleton connected to the voice coil is easily The swing phenomenon occurs in the vibration, which directly causes the torsion phenomenon of the skeleton extension. The skeleton extension makes the sound-emitting device low in reliability and affects the sound-emitting effect of the diaphragm, resulting in poor acoustic performance of the sound-emitting device. Especially the high frequency performance is poor.

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

technical problem

The purpose of the utility model is to provide a sound-emitting device with high reliability and good high-frequency performance.

technical solutions

In order to achieve the above purpose, the present invention provides a sound-generating device, which includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate and sound, and the vibration system includes a vibrating membrane and a voice coil that drives the vibration membrane to vibrate and sound. and a skeleton for fixing the diaphragm on the voice coil, the skeleton includes a skeleton body in a ring shape and fixed on the diaphragm, and a skeleton from the end of the skeleton body away from the diaphragm to the voice coil. a ring-shaped skeleton extension part bent and extended in the direction, a skeleton fixing part bent and extended from the skeleton extension part and fixed to the voice coil, and a skeleton flange part bent and extended from the inner periphery of the skeleton extension part , the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke and a secondary magnetic steel surrounding the main magnetic steel, the secondary magnetic steel and the main magnetic steel are spaced to form a magnetic gap, so The voice coil is inserted into the magnetic gap, the skeleton flange part and the skeleton fixing part together form a hollow area, and the voice coil, the main magnetic steel and the auxiliary magnetic steel are all arranged in the hollow area .

Preferably, the frame flange portion has an arc-shaped structure and is formed by bending and extending the inner peripheral edge of the frame extending portion toward the diaphragm.

Preferably, the skeleton body is provided with a through hole passing through the position facing the skeleton flange portion.

Preferably, the skeleton flange part and the skeleton extension part are recessed together in a direction away from the auxiliary magnet to form an escape groove, and the auxiliary magnet is located in the escape groove and is spaced from the skeleton flange part set up.

Preferably, the voice coil has a rectangular structure with rounded corners; the auxiliary magnets include four, two of the auxiliary magnets are arranged at intervals on opposite sides of the long axis of the voice coil, and the other two are The auxiliary magnets are arranged at intervals on opposite sides of the short axis of the voice coil; the frame fixing parts include four, and each frame fixing part is fixed to a circle on the side of the voice coil close to the diaphragm. corner position.

Preferably, the skeleton fixing part includes a first section that is bent along the outer peripheral side of the voice coil by the skeleton extending part, and a first section that is bent and extended from the first section and is fixed to the voice coil close to the vibration coil. For the second segment on one side of the membrane, the opposite sides of the first segment are respectively connected with two adjacent flange portions of the skeleton to form an integral body.

Preferably, the magnetic circuit system further comprises a magnetic conducting plate covering the side of the main magnet steel far from the yoke, the magnetic conducting plate comprising a magnetic conducting plate body fixed on the main magnet steel, The peripheral edge of the magnetic conductive plate body is bent and extended in the direction of the magnetic yoke, and the magnetic conductive plate side wall is bent and extended from the magnetic conductive plate side wall to the direction away from the main magnet steel. The magnetic conductive plate fixing part is fixed on the side of the secondary magnetic steel away from the yoke, the diaphragm is arranged around the side wall of the magnetic conductive plate, and the inner peripheral side of the diaphragm is connected to the the side wall of the magnetic conductive plate, the fixing part of the magnetic conductive plate is located in the escape groove and is spaced from the flange part of the frame.

Preferably, the sound-generating device further includes a basin frame, the magnetic yoke is fixed to the basin frame, the diaphragm is annular, the outer peripheral side of the diaphragm is fixed to the basin frame, and the diaphragm includes An annular first folded ring portion, an annular second folded ring portion surrounding the first folded ring portion and spaced apart from each other, from the outer peripheral side of the first folded ring portion to the second folded ring a first vibrating part that is bent and extended from the inner circumference of the second folded ring part; a first fixed part bent and extended from the side, a second fixed part bent and extended from the outer peripheral side of the second folded ring part, and covered respectively on the side of the first vibration part close to the yoke and on the side of the yoke The second vibration part is close to the top of the ball on one side of the yoke, the first fixed part is fixed to the magnetic circuit system, the frame body is fixed to the top of the ball, and the second fixed part is fixed to the a basin frame; the first vibrating part is connected to the second vibrating part.

Preferably, the skeleton further includes a skeleton reinforcement portion bent and extended from the side of the skeleton body away from the magnetic yoke, and the skeleton reinforcement portion is fixed on the top of the ball.

Preferably, the vibration system further includes an elastic support assembly spaced from the diaphragm; one end of the elastic support assembly is fixed to the basin frame, and the other end of the elastic support assembly is fixed to the frame extension portion.

beneficial effect

Compared with the related art, the sound-emitting device of the present invention forms a skeleton flange portion by bending and extending the inner periphery of the annular skeleton extension portion of the skeleton, so that the skeleton flange portion forms a ring-shaped flanging structure, The skeleton flange part, the skeleton extension part and the skeleton body form a U-shaped structure, which avoids the vibration of the skeleton connected by the voice coil, which directly causes the torsion of the skeleton extension part, and the U-shaped structure formed by the skeleton flange part. The shape structure improves the reliability of the sound-emitting device, and makes the sound-emitting effect of the diaphragm, thereby improving the acoustic performance of the sound-emitting device, especially the high-frequency performance of the sound-emitting device.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the stereoscopic structure schematic diagram of the sound-emitting device of the present invention;

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

Fig. 3 is a sectional view along line A-A in Fig. 1;

Fig. 4 is the enlarged view of the part shown in B in Fig. 3;

5 is a schematic three-dimensional structure diagram of the skeleton of the sound-emitting device of the present invention;

FIG. 6 is a schematic diagram of the three-dimensional structure assembly of the skeleton, the voice coil, the main magnetic steel and the auxiliary magnetic steel of the sound-emitting device of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, but not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIGS. 1-6 at the same time, the present invention provides a sound-generating device 100, the sound-generating device 100 includes a basin frame 1, a vibration system 2 respectively fixed to the basin frame 1, and driving the vibration system 2 to vibrate and emit sound The magnetic circuit system 3. The magnetic circuit system 3 has a magnetic gap 30 and a magnetic yoke 31 fixed to the basin frame 1 .

The vibration system 2 includes a diaphragm 21 , a voice coil 22 , a frame 23 and an elastic support component 24 .

The diaphragm 21 is annular and is arranged around the magnetic circuit system 3 . The outer peripheral side of the diaphragm 21 is fixed to the basin frame 1 . The inner peripheral side of the diaphragm 21 surrounds and is connected to the magnetic circuit system 3 .

Specifically, the diaphragm 21 includes an annular first folded ring portion 211, an annular second folded ring portion 212 that surrounds the first folded ring portion 211 and is spaced from each other, and is formed by the first folded ring portion 212. The first vibrating portion 213 , the outer peripheral side of the ring portion 211 is bent and extended toward the second folding ring portion 212 , and the first vibration portion 213 is bent and extended from the inner peripheral side of the second folding ring portion 212 to the first folding ring portion 211 . The second vibrating portion 215 , the first fixing portion 214 bent and extended from the inner peripheral side of the first folded ring portion 211 , and the second fixed portion folded and extended from the outer peripheral side of the second folded ring portion 212 216 and the ball top 217 covered on the first vibrating part 213 and the second vibrating part 215 respectively. The first fixing portion 214 is fixed to the magnetic circuit system 3 , and the second fixing portion 216 is fixed to the basin frame 1 .

In this embodiment, the first vibrating part 213 is connected to the second vibrating part 215 . This structure makes the first vibrating part 213 , the second vibrating part 215 and the ball top 217 form an integrated structure, so that the acoustic performance of the vibrating membrane 21 is good, and at the same time, it can prevent the vibration caused by vibration. Layered.

The voice coil 22 drives the diaphragm 21 to vibrate and produce sound. The voice coil 22 has a rectangular structure with rounded corners. The voice coil 22 is inserted into the magnetic gap 30 .

The skeleton 23 is annular. The diaphragm 21 is fixed to the voice coil 22, so that the voice coil 22 drives the diaphragm 21 to vibrate and produce sound.

Specifically, the frame 23 includes a frame body 231 , a frame extension portion 232 , a frame fixing portion 233 , a frame flange portion 234 and a frame reinforcing portion 235 .

The skeleton body 231 is annular. One end of the frame body 231 is fixed to the diaphragm 21 , and the opposite end of the frame body 231 is fixed to the elastic support component 24 . Specifically, the frame body 231 is fixed to the ball top 217 .

The skeleton extension portion 232 is annular. The frame extending portion 232 is formed by bending and extending an end of the frame body 231 away from the diaphragm 21 toward the voice coil 22 .

The frame fixing portion 233 is formed by bending and extending the frame extending portion 232 . The frame fixing portion 233 is fixed to the voice coil 22 . In this embodiment, the frame fixing portion 233 includes four, and each frame fixing portion 233 is fixed to a rounded position on the side of the voice coil 22 close to the diaphragm 21 . This structure enables the bobbin 23 to be connected to the voice coil 22 without occupying the position of the magnetic gap 30 , so that the magnetic field driving force of the magnetic circuit system 3 is strong.

The frame fixing portion 233 includes a first section 2331 that is bent along the outer circumference of the voice coil 22 by the frame extending portion 232 , and a first section 2331 that is bent and extended from the first section 2331 and is fixed near the voice coil 22 . The second segment 2332 on one side of the diaphragm 21 . This structure enables the frame fixing portion 233 to extend along the circumference of the voice coil 22 from the frame extending portion 232 and abut against the side of the voice coil 22 close to the diaphragm 21 , thereby realizing the The voice coil 22 is suspended in the magnetic gap 30 , which is beneficial to the lightweight and thin design of the sounding device 100 .

The frame flange portion 234 is formed by bending and extending the inner peripheral edge of the frame extending portion 232 . In this embodiment, the frame flange portion 234 is formed by bending and extending the inner peripheral edge of the frame extending portion 232 in the direction of the diaphragm 21 .

The opposite sides of the first segment 2331 are respectively connected with two adjacent frame flange portions 234 to form an integral body. The structure is formed such that the frame extending portion 232 forms a ring-shaped flanging structure, that is, the frame flange portion 234 is formed to form a ring-shaped flange structure. The frame flange portion 234 and the frame extending portion 232 And the skeleton body 231 forms a U-shaped structure, which prevents the skeleton 23 connected to the voice coil 22 from swinging in vibration, which directly causes the skeleton extension 232 to twist. The U-shaped structure formed by the flange portion 234 improves the reliability of the sound-emitting device 100 and enables the sound-emitting effect of the diaphragm 21 to improve the acoustic performance of the sound-emitting device 100 , especially the sound-emitting device 100 excellent high frequency performance.

In order to better enhance the torsion phenomenon of the frame flange portion 234 , in this embodiment, the frame flange portion 234 has an arc-shaped structure. When the frame flange portion 234 of the arc-shaped structure is subjected to the force of the voice coil 22 swinging, this structure effectively improves the torsion state of the frame flange portion 234 , so that the sounding device 100 is High reliability.

The frame flange portion 234 and the frame fixing portion 233 together form a hollow area 230 . The hollow area 230 is used for accommodating the voice coil 22 and the components of the magnetic circuit system 3 , so that the sound generating device 100 is light and thin.

In this embodiment, the position of the frame body 231 facing the frame flange portion 234 is provided with a through hole 2310 therethrough. The through hole 2310 balances the air pressure in the cavity formed on the side of the frame 23 close to the voice coil 22 and the air pressure in the cavity formed by the frame 23 and the basin frame 1 . In addition, the through hole 2310 and the skeleton flange portion 234 are disposed directly opposite, so that the skeleton flange portion 234 receives the deformation pressure generated by the swinging force of the voice coil 22, and can pass through the through hole The differential air pressure between the inside and outside of the 2310 is released, so that the risk of twisting of the skeleton flange portion 234 is reduced, so that the reliability of the sounding device 100 is high, and the high-frequency performance of the sounding device 100 is excellent.

The frame reinforcement portion 235 is bent and extended from the side of the frame body 231 away from the yoke 31 . The frame reinforcement portion 235 is fixed to the ball top 217 . This structure increases the bonding and fixing area of the frame 23 and the diaphragm 21 , so that the reliability of the fixing of the frame body 231 and the diaphragm 21 is higher.

The elastic support component 24 is spaced apart from the diaphragm 21 . One end of the elastic support element 24 is fixed to the basin frame 1 , and the other end is fixed to the frame 23 . The elastic support assembly 24 is used to balance the vibration of the voice coil 22 , and the support of the voice coil 22 by the elastic support assembly 24 is more stable and the vibration reliability is better. In this embodiment, the second upper folding ring portion 212 is disposed opposite to the elastic support component 24 . This structure makes the acoustic performance of the vibrating membrane 21 sound good.

In this embodiment, the elastic support components 24 include two and are respectively disposed on opposite sides of the voice coil 22. The two symmetrical elastic support components 24 support the voice coil 22 more stably, preventing The swing of the voice coil 22 is better, and the vibration reliability is better.

The magnetic circuit system 3 includes a magnetic yoke 31 , a main magnetic steel 32 , a secondary magnetic steel 33 , and a magnetic conducting plate 34 covering the side of the main magnetic steel 32 away from the magnetic yoke 31 .

The yoke 31 is fixed to the basin frame 1 .

In this embodiment, the ball tops 217 are respectively covered on the side of the first vibrating part 213 close to the yoke 31 and the side of the second vibrating part 215 close to the yoke 31 .

In this embodiment, the first folding ring portion 211 has an arc-shaped structure formed by concave in a direction away from the yoke 31 , and the second folding ring portion 212 is formed by an arc formed by a depression in a direction close to the magnetic yoke 31 . shape structure. This structure makes the arc-shaped structure of the first folded ring portion 211 and the arc-shaped structure of the second folded ring portion 212 arranged in opposite directions, so that the acoustic performance of the vibration and sound of the diaphragm 21 is good, and at the same time The risk of delamination of the first folded ring portion 211 and the second folded ring portion 212 due to too large vibration amplitude is prevented, thereby improving the reliability of the diaphragm 21 . Of course, the first folding ring portion 211 may also be an arc-shaped structure formed by concave in the direction close to the magnetic yoke 31 .

The main magnet 32 is fixed to the yoke 31 . Specifically, the main magnetic steel 32 includes an upper main magnetic steel 321 , a main pole core 322 and a lower main magnetic steel 323 stacked in sequence along the vibration direction of the diaphragm 21 , and the lower main magnetic steel 323 is fixed to the The yoke 31 is described. In this structure, the main magnetic steel 323 is set as two magnetic steel structures of the upper main magnetic steel 321 and the lower main magnetic steel 323. The arrangement of the two magnetic steel structures can enhance the driving force of the magnetic field lines of the magnetic gap 30, so that the As many magnetic lines of force of the magnetic circuit system 3 are cut as possible by the voice coil 22 to form a larger space for the magnetic circuit of the driving force. And this structure increases the depth of the magnetic gap 30 through the main pole core 322, that is, the depth of the formed magnetic gap 30 is the sum of the thicknesses of the three components of the upper main magnetic steel 321, the main pole core 322 and the lower main magnetic steel 323, thereby While ensuring the driving force of the magnetic lines of force of the magnetic gap 30 , the voice coil 22 has a wide movement range within the magnetic gap 30 , so that the sensitivity of the sounding device 100 is high, and the acoustic performance of the sounding device 100 is excellent.

In this embodiment, along the vibration direction of the diaphragm 21 , the projection of the upper main magnet 321 to the yoke 31 , the projection of the main pole core 322 to the yoke 31 , and the projection of the lower main magnet 321 to the yoke 31 The projections of the magnetic steel 323 onto the magnetic yoke 31 are completely coincident. This structure enables the main magnetic steel 32 to form an integrated structure, so that the magnetic field in the magnetic gap 30 is more balanced, and at the same time, it is easier to manufacture and assemble.

The secondary magnet 33 is fixed to the yoke 31 . The secondary magnet 33 surrounds the main magnet 32 . The secondary magnetic steel 33 is spaced apart from the main magnetic steel 32 to form a magnetic gap 30 , and the voice coil 22 is inserted into the magnetic gap 30 .

Wherein, the voice coil 22 , the main magnetic steel 32 and the secondary magnetic steel 33 are all disposed in the hollow area 230 . This structure is beneficial to the lightening and thinning of the sound-emitting device 100 .

In order to better optimize the internal space of the sound-generating device 100 and make the sound-generating device 100 lighter and thinner, in this embodiment, the skeleton flange portion 234 and the skeleton extension portion 232 together move away from the auxiliary The direction of the magnetic steel 33 is recessed to form an escape groove 2340 , and the auxiliary magnetic steel 33 is located in the escape groove 2340 and is spaced from the frame flange portion 234 . The setting of the avoidance slot 2340 can optimize the internal space optimization of the sound-emitting device 100 , so that the skeleton 23 does not affect the volume of the magnetic gap 30 , so that the magnetic driving force of the magnetic circuit system 3 is strong, thereby Therefore, the acoustic performance of the sound-emitting device 100 is good.

The magnetic conductive plate 34 is covered with the main magnetic steel 32 away from the magnetic yoke 31 .

The magnetic conductive plate 34 includes a magnetic conductive plate body 341 and a magnetic conductive plate side wall 342 that is bent and extended from the peripheral edge of the magnetic conductive plate body 341 to the direction of the magnetic yoke 31 . The diaphragm 21 is disposed around the side wall 342 of the magnetic conductive plate. The inner peripheral side of the diaphragm 21 is connected to the side wall 342 of the magnetic conductive plate.

In order to reduce the leakage of the magnetic field of the magnetic circuit system 3 , the magnetic conductive plate 34 is set in a flat plate shape, and the magnetic conductive plate 34 covers the main magnetic steel 32 and the magnetic gap 30 . The magnetic conductive plate 34 is in contact with the main magnetic steel 32 . The magnetic conductive plate 34 is attached and fixed to the side of the main magnetic steel 32 away from the magnetic yoke 31 . Specifically, the main magnetic steel 32 is attached and fixed to the magnetic conductive plate body 341 .

In order to strengthen the strength of the magnetic field in the magnetic gap 30 , in the present embodiment, the magnetic conductive plate 34 further includes a conductive plate that is bent and extended from the side wall 342 of the magnetic conductive plate in a direction away from the main magnetic steel 32 . Magnetic plate fixing part 343 . The magnetic conductive plate fixing portion 343 is fixed to the side of the secondary magnetic steel 33 away from the magnetic yoke 31 . In this structure, the main magnetic steel 32 and the auxiliary magnetic steel 33 are formed into one body by providing the magnetic conducting plate fixing portion 343 , so that the intensity of the magnetic field is higher.

The magnetic conductive plate fixing portion 343 is located in the escape groove 2340 and is spaced apart from the frame flange portion 234 . With this structure, the frame 23 does not affect the volume of the magnetic gap 30 , so that the magnetic driving force of the magnetic circuit system 3 is strong, so that the acoustic performance of the sound-emitting device 100 is good.

The diaphragm 21 is disposed around the side wall 342 of the magnetic conductive plate. The inner peripheral side of the diaphragm 21 is connected to the side wall 342 of the magnetic conductive plate.

In this embodiment, the main magnetic steel 32 has a rectangular structure. The auxiliary magnetic steels 33 include four, two of the auxiliary magnetic steels 33 are arranged on opposite sides of the long axis of the voice coil 22 at intervals, and the other two auxiliary magnetic steels 33 are arranged at intervals on the voice coil. 22 on opposite sides of the short axis. The magnetic conductive plate fixing portions 343 include four, and the magnetic conductive plate fixing portions 343 are in one-to-one correspondence with the auxiliary magnetic steel 33 .

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

Claims

A sound-generating device, which includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate and sound, the vibration system includes a vibrating membrane, a voice coil that drives the vibrating membrane to vibrate and sound, and the vibrating membrane is fixed on the A skeleton of a voice coil, the skeleton includes a skeleton body that is annular and fixed to the diaphragm, and an annular skeleton extending from the end of the skeleton body away from the diaphragm to the direction of the voice coil. a bobbin fixing part which is bent and extended from the bobbin extension part and is fixed to the voice coil; the magnetic circuit system comprises a yoke, a main magnet steel respectively fixed to the yoke and surrounding the main magnet The auxiliary magnetic steel, the auxiliary magnetic steel and the main magnetic steel are spaced apart to form a magnetic gap, and the voice coil is inserted into the magnetic gap. The skeleton flange part is folded and extended, the skeleton flange part and the skeleton fixing part together form a hollow area, and the voice coil, the main magnet steel and the auxiliary magnet steel are all arranged in the hollow area.
The sound-generating device according to claim 1, wherein the frame flange portion has an arc-shaped structure and is formed by bending and extending the inner peripheral edge of the frame extending portion toward the diaphragm.
The sound-generating device according to claim 1, characterized in that, the position of the frame body facing the flange portion of the frame is provided with a through hole penetrating therethrough.
The sound-emitting device according to claim 1, wherein the skeleton flange part and the skeleton extension part are recessed together to form an escape groove in a direction away from the auxiliary magnet, and the auxiliary magnet is located in the escape groove. in the groove and spaced apart from the flange part of the frame.
The sound-generating device according to claim 4, wherein the voice coil has a rectangular structure with rounded corners; the auxiliary magnetic steel comprises four, and the two auxiliary magnetic steels are arranged at intervals on the edge of the voice coil. On the opposite sides of the long axis, the other two auxiliary magnets are arranged at intervals on the opposite sides of the short axis of the voice coil; the frame fixing parts include four, and each frame fixing part is fixed on the The voice coil is close to the rounded corner on the side of the diaphragm.
The sound-generating device according to claim 5, wherein the skeleton fixing portion comprises a first section along the outer circumference side of the voice coil by the skeleton extending portion, and a first section folded and extended from the first section and is fixed on the second section of the voice coil on the side close to the vibrating membrane, and the opposite sides of the first section are respectively connected with two adjacent frame flanges to form an integral body.
The sound-generating device according to claim 4, wherein the magnetic circuit system further comprises a magnetic conducting plate covering a side of the main magnet steel away from the yoke, the magnetic conducting plate comprising a The magnetic conductive plate body of the main magnetic steel, the magnetic conductive plate side wall bent and extended from the periphery of the magnetic conductive plate body to the direction of the magnetic yoke, and the magnetic conductive plate side wall away from the main magnet The magnetic conductive plate fixing part is bent and extended in the direction of the steel, the magnetic conductive plate fixing part is fixed on the side of the secondary magnetic steel away from the yoke, and the vibrating film is arranged around the side wall of the magnetic conductive plate, The inner peripheral side of the diaphragm is connected to the side wall of the magnetic conductive plate, and the fixed portion of the magnetic conductive plate is located in the escape groove and is spaced from the frame flange portion.
The sound-generating device according to claim 1, wherein the sound-generating device further comprises a basin frame, the magnetic yoke is fixed to the basin frame, the diaphragm is annular, and the outer peripheral side of the diaphragm is fixed In the basin frame, the diaphragm includes an annular first folded ring portion, an annular second folded ring portion that surrounds the first folded ring portion and is spaced apart from each other, and is formed by the first folded ring portion. a first vibrating part bent and extended from the outer peripheral side of the second folding ring part to the second folding ring part; a second vibrating part which is bent and extended from the inner peripheral side of the second folding ring part to the first folding ring part, A first fixing portion bent and extended from the inner peripheral side of the first folded ring portion, a second fixed portion bent and extended from the outer peripheral side of the second folded ring portion, and covered respectively on the first vibration The first fixing part is fixed to the magnetic circuit system, and the frame body is fixed to the ball top , the second fixing part is fixed to the basin frame; the first vibrating part is connected to the second vibrating part.
The sound-generating device according to claim 8, wherein the frame further comprises a frame reinforcement part bent and extended from a side of the frame body away from the magnetic yoke, and the frame reinforcement part is fixed on the top of the ball .
The sound-generating device according to claim 1, wherein the vibration system further comprises an elastic support assembly spaced apart from the vibrating membrane; one end of the elastic support assembly is fixed to the basin frame, and the other end of the elastic support assembly is fixed on the skeleton extension.