WO2022067973A1

WO2022067973A1 - Sound-producing device

Info

Publication number: WO2022067973A1
Application number: PCT/CN2020/127753
Authority: WO
Inventors: 宋威; 肖波; 梁平; 令狐荣林; 孔晨亮
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: 2020-11-10
Publication date: 2022-04-07
Also published as: CN213462288U

Abstract

The present utility model provides a sound-producing device, comprising a vibration system and a magnetic circuit system; the vibration system comprises an annular diaphragm, a voice coil, and an outer frame which is annular and is sandwiched and fixed between the diaphragm and a magnetic conductive plate; the magnetic circuit system comprises magnetic yokes, main magnetic steels respectively fixed to the magnetic yokes, secondary magnetic steels surrounding the main magnetic steels, and the magnetic conductive plate; the magnetic conductive plate comprises a magnetic conductive plate body fixed to the main magnetic steels, and magnetic conductive plate side walls extending, in a bending manner, from the periphery of the magnetic conductive plate body to the direction of the magnetic yokes; the diaphragm is arranged surrounding the magnetic conductive plate side walls, the inner peripheral side of the diaphragm is connected to the magnetic conductive plate side walls; the outer frame comprises an annular outer frame body, and outer frame flange portions extending, in a bending manner, from the side of the outer frame body away from the magnetic yokes; the outer frame body is fixed to the inner peripheral side of the diaphragm and is arranged surrounding the magnetic conductive plate side walls, and the outer frame flange portions are fixed to the side of the magnetic conductive plate body away from the magnetic yokes. Compared with the related art, the sound-producing device of the present utility model has a simpler structure and higher reliability.

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 emit sound. The outer frame of the diaphragm, the diaphragm and the outer frame are annular and arranged around the magnetic circuit system, the outer peripheral side of the diaphragm is fixed to the basin frame, and the inner peripheral side of the diaphragm is fixed to the The outer skeleton is fixed on the magnetic circuit system; the magnetic circuit system includes a magnetic yoke fixed on the basin frame, a main magnetic steel fixed on the magnetic yoke and a surrounding main magnetic steel The auxiliary magnetic steel and a magnetic conducting plate on the side of the main magnet far away from the yoke are covered, and the inner side of the outer frame is fixed on the magnetic conducting plate.

However, the outer frame of the sound-emitting device of the related art is fixed to the inner peripheral side of the diaphragm and the outer peripheral side of the magnetic conductive plate along the inner side and the outer side perpendicular to the vibration direction of the diaphragm, respectively, when the When the diaphragm is vibrated for a long time, the outer frame and the magnetic conductive plate are subjected to the force transmitted to the place by the vibration of the diaphragm, and this structure easily causes the risk of separation of the outer frame and the magnetic conductive plate. The reliability of the sound-emitting device is low.

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 sounding device with simple structure and high reliability.

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 ring-shaped vibrating membrane, which drives the vibrating membrane to vibrate. A voice coil that emits sound and a ring-shaped outer skeleton sandwiched and fixed between the diaphragm and the magnetic conducting plate, the magnetic circuit system includes a magnetic yoke, a main magnet steel respectively fixed to the magnetic yoke and A secondary magnetic steel surrounding the main magnetic steel and a magnetic conducting plate covering the side of the main magnetic steel away from the yoke, the secondary magnetic steel and the main magnetic steel are spaced apart to form a magnetic gap, and the sound The magnetic conductive plate includes a magnetic conductive plate body fixed to the main magnet steel and a magnetic conductive plate side bent and extended in the direction of the magnetic yoke from the peripheral edge of the magnetic conductive plate body The diaphragm 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 outer frame includes a ring-shaped outer frame body and a The outer frame body is bent and extended from the side of the outer frame body away from the magnetic yoke. The flange portion is fixed on the side of the magnetic conductive plate body away from the magnetic yoke.

Preferably, the flange portion of the outer frame is fixed to the magnetic conductive plate body by laser welding.

Preferably, the outer frame flanging portion includes a plurality of outer frame flange portions, and the plurality of outer frame flanging portions are symmetrically spaced from each other.

Preferably, the outer frame body has a rectangular structure, and the outer frame flanging parts include six, two of which are respectively located on opposite sides of the short axis of the outer frame body, and the other four Each two of the outer frame flanging parts are distributed symmetrically on opposite sides of the long axis of the outer frame body as a group; the length of the outer frame flange part located on one side of the short axis of the outer frame body It is greater than the length of the flange portion of the outer frame located on one side of the long axis of the outer frame body.

Preferably, the sounding device further includes a basin frame, the magnetic yoke is fixed to the basin frame, the outer peripheral side of the diaphragm is fixed to the basin frame, and the diaphragm includes a ring-shaped first fold ring a second folded ring part that surrounds the first folded ring part and is spaced apart from each other; part, a second vibrating part bent and extended from the inner peripheral side of the second folding ring part to the first folding ring part, and a first fixed part bent and extended from the inner peripheral side of the first folding ring part a second fixing part bent and extended from the outer peripheral side of the second folded ring part; On the ball top on one side of the yoke, the first fixing part is fixed to the outer frame body, the second fixing part is fixed to the basin frame; the first vibrating part is connected to the second vibrating part.

Preferably, the vibrating membrane further includes a ring-shaped reinforcing portion that is bent and extended from the inner peripheral edge of the first fixing portion along the extending direction of the outer frame body, and the reinforcing portion is fixed to the outer frame body. .

Preferably, the first folding ring portion has an arc-shaped structure formed by concave in a direction away from the magnetic yoke, and the second folding ring portion is formed in an arc-shaped structure formed by a depression in a direction close to the magnetic yoke.

Preferably, the vibration system further includes a ring-shaped elastic support assembly and an inner frame arranged at intervals around the magnetic circuit system, the outer peripheral side of the elastic support assembly is fixed to the basin frame; the inner frame includes a An annular inner frame body and an inner frame fixing portion extending from the inner frame body to the magnetic gap, the ball top and the inner peripheral side of the elastic support component are respectively fixed to opposite two opposite sides of the inner frame body. end, the inner frame fixing part is fixed to the voice coil.

Preferably, the main magnetic steel includes an upper main magnetic steel, a main pole core and a lower main magnetic steel stacked in sequence along the vibration direction of the diaphragm, and the lower main magnetic steel is fixed to the yoke; the The magnetic conductive plate further includes a magnetic conductive plate fixing portion bent and extended from the side wall of the magnetic conductive plate in a direction away from the main magnetic steel, and the magnetic conductive plate fixing portion is fixed to the auxiliary magnetic steel away from the magnetic steel. side of the yoke.

Preferably, the main magnetic steel has a rectangular structure, the auxiliary magnetic steel includes four, two of the auxiliary magnetic steel are respectively located on opposite sides of the long axis of the main magnetic steel, and the other two auxiliary magnetic steels The steel is respectively located on opposite sides of the long axis of the main magnetic steel; the magnetic conductive plate fixing parts include four, and the magnetic conductive plate fixing parts are in one-to-one correspondence with the auxiliary magnetic steel.

beneficial effect

Compared with the related art, the sound-generating device of the present invention has a ring-shaped outer skeleton body and an outer skeleton flanging portion that is bent and extended from the outer skeleton body away from the magnetic yoke by setting the outer skeleton in a ring shape. The outer frame body is fixed on the inner peripheral side of the diaphragm and arranged around the side wall of the magnetic conductive plate, and then the flange portion of the outer frame is fixed on the magnetic conductive plate body away from the yoke side. The flanging part of the outer frame forms a fixed structure with the main body of the magnetic conductive plate in the vibration direction of the diaphragm, and this structure effectively prevents the force point at the joint of the outer frame and the magnetic conductive plate from being affected. The effect of the force in the opposite direction when the diaphragm vibrates, so that the sound-emitting device of the present invention does not need to change the component structure and connection relationship, and effectively ensures the stability of the fixation of the outer skeleton and the magnetic conducting plate, thereby The reliability of the sound-emitting device is improved.

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 an enlarged view of the portion indicated by B in FIG. 3 .

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. 1-4 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 , an outer frame 23 , an elastic support component 24 and an inner frame 25 .

The diaphragm 21 is annular and is arranged around the magnetic circuit system 3 . The outer peripheral side of the upper diaphragm 21 is fixed to the basin frame 1 . The inner peripheral side of the upper 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. Wherein, 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 is inserted into the magnetic gap 30 .

The skeleton 23 is annular. The frame 23 is used to fix the diaphragm 21 to the magnetic circuit system 3 .

The elastic support components 24 are annular and are arranged at intervals around the magnetic circuit system 3 . The outer peripheral side of the elastic support element 24 is fixed to the basin frame 1 , and the inner peripheral side of the elastic support element 24 is fixed to the inner frame 25 . The elastic support assembly 24 is used to balance the vibration of the voice coil 22 , and the elastic support assembly 24 supports the voice coil 22 more stably and has better vibration reliability. 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.

The inner frame 25 includes a ring-shaped inner frame body 251 and an inner frame fixing portion 252 extending from the inner frame body 251 to the magnetic gap 30 . The inner peripheral sides of the ball top 217 and the elastic support component 24 are respectively fixed to opposite ends of the inner frame body 251 . The inner frame fixing portion 252 is fixed to the voice coil 22 . This structure allows the voice coil 22 to pass through. The inner frame 25 drives the diaphragm 21 to vibrate and emit sound, and at the same time is connected to the elastic support assembly 24, so that the vibration balance and feasibility are high.

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 The driving force of the magnetic lines of force of the magnetic gap 30 is ensured, and the movement range of the voice coil 22 in the magnetic gap 30 is wide, 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 .

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.

In this embodiment, the main magnetic steel 32 has a rectangular structure. The auxiliary magnetic steel 33 includes four; two auxiliary magnetic steels 33 are located on opposite sides of the long axis of the main magnetic steel 32 respectively, and the other two auxiliary magnetic steels 33 are respectively located in the main magnetic steel 33 Opposite sides of the long axis of steel 32. 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 outer frame 23 is sandwiched and fixed between the diaphragm 21 and the magnetic conducting plate 34 . The outer frame 23 includes a ring-shaped outer frame body 231 and an outer frame flange portion 232 that is bent and extended from the side of the outer frame body 231 away from the yoke 31 to a direction away from the basin frame 1 . .

The inner peripheral side of the diaphragm 21 is fixed to the outer frame body 231 . Specifically, the first fixing portion 214 is fixed to the outer frame body 231 . In this embodiment, the diaphragm 21 further includes an annular reinforcing portion 218 that is bent and extended from the inner peripheral edge of the first fixing portion 214 along the extending direction of the outer frame body 231 . The reinforcing portion 218 is fixed to the outer frame body 231 . The arrangement of the reinforcing portion 218 makes the combination area of the diaphragm 21 and the outer frame body 231 larger, the fixed combination is more reliable, and the reliability is higher.

The outer frame body 231 is disposed around the side wall 342 of the magnetic conducting plate. The flange portion 232 of the outer frame is fixed to the side of the magnetic conductive plate body 341 away from the magnetic yoke 31 . This structure realizes that the diaphragm 21 is fixed to the magnetic conductive plate 34 through the outer frame 23 .

In this embodiment, the outer frame body 231 is attached and fixed to the side wall 342 of the magnetic conductive plate. Therefore, the outer frame 23 is respectively fixed to the magnetic conductive plate 34 through the outer frame body 231 and the outer frame flange portion 232, so that the outer frame 23 and the magnetic conductive plate 34 are fixed in a stable manner. More reliable and more reliable.

In this embodiment, the outer frame flange portion 232 is fixed to the magnetic conductive plate body 341 by laser welding. The spot welding fixing structure through laser welding can make the outer frame flange part 232 and the magnetic conductive plate body 341 welded more firmly, and improve the reliability; on the other hand, the outer frame flange can be flanged The fixed area between the part 232 and the magnetic conducting plate body 341 is small, which can make the sounding device 100 lighter and thinner.

In order to make the sounding device 100 lighter and thinner, the outer frame flange portion 232 includes a plurality of. A plurality of the outer frame flanging portions 232 are symmetrically spaced from each other. In this embodiment, the outer frame body 231 has a rectangular structure. The outer frame flange portion 232 includes six. Two of the outer frame flanging portions 232 are located on opposite sides of the short axis of the outer frame body 231 respectively; and two of the other four outer frame flanging portions 232 are distributed symmetrically at intervals on the outer frame body 231 . Opposite sides of the long axis of the outer frame body 231 . The length of the outer frame flange portion 232 located on the short axis side of the outer frame body 231 is greater than the length of the outer frame flange portion 232 located on the long axis side of the outer frame body 231 . On the one hand, this structure can make the flange part 232 of the outer frame and the magnetic conductive plate body 341 welded more firmly, and improve the reliability; The length of the outer frame flange portion 232 makes the sound-emitting device 100 light and thin.

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 ring-shaped diaphragm and a voice coil that drives the diaphragm to vibrate and sound, the magnetic circuit system It includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, a secondary magnetic steel surrounding the main magnetic steel, and a magnetic conducting plate covering the side of the main magnetic steel away from the magnetic yoke. The magnetic steel is spaced from the main magnetic steel to form a magnetic gap, the voice coil is inserted into the magnetic gap, and the magnetic conductive plate includes a magnetic conductive plate body fixed on the main magnetic steel and a magnetic conductive plate body fixed on the main magnetic steel. the side wall of the magnetic conductive plate whose peripheral edge is bent and extended in the direction of the magnetic yoke, the vibrating film is arranged around the side wall of the magnetic conductive plate, and the inner peripheral side of the vibrating film is connected to the side wall of the magnetic conductive plate, It is characterized in that, the vibration system further includes a ring-shaped outer frame sandwiched and fixed between the vibrating film and the magnetic conducting plate, the outer frame includes a ring-shaped outer frame body and a The outer frame body is bent and extended from the side of the outer frame body away from the magnetic yoke. The flange portion is fixed on the side of the magnetic conductive plate body away from the magnetic yoke.
The sounding device according to claim 1, wherein the flange portion of the outer skeleton is fixed to the magnetic conductive plate body by laser welding.
The sound-generating device according to claim 1, characterized in that, the outer frame flange portion comprises a plurality of outer frame flange portions, and the plurality of outer frame flange portions are symmetrically spaced from each other.
The sound-generating device according to claim 3, wherein the outer frame body has a rectangular structure, the outer frame flange portion includes six, and two of the outer frame flange portions are respectively located on the outer frame On the opposite sides of the short axis of the body, each two of the other four outer frame flanges are distributed symmetrically on the opposite sides of the long axis of the outer frame body as a group; The length of the outer frame flange portion on the side is greater than the length of the outer frame flange portion located on one side of the long axis of the outer frame body.
The sound-generating device according to claim 3, wherein the sound-generating device further comprises a basin frame, the magnetic yoke is fixed to the basin frame, the outer peripheral side of the diaphragm is fixed to the basin frame, the The diaphragm includes an annular first folded ring portion, an annular second folded ring portion surrounding the first folded ring portion and spaced from each other, and extending from the outer peripheral side of the first folded ring portion to the first folded ring portion. A first vibrating portion bent and extended from two folded ring portions, a second vibrating portion bent and extended from the inner peripheral side of the second folded ring portion to the first folded The first fixed part bent and extended from the inner peripheral side of the second folded ring part; and the second vibration part is close to the top of the ball on the side of the yoke, the first fixed part is fixed to the outer frame body, the second fixed part is fixed to the basin frame; the first vibration The part is connected to the second vibration part.
The sound-generating device according to claim 5, wherein the diaphragm further comprises a ring-shaped reinforcing portion that is bent and extended from the inner peripheral edge of the first fixing portion along the extending direction of the outer frame body, The reinforcement portion is fixed to the outer frame body.
The sound-generating device according to claim 5, wherein the first folded ring portion has an arc-shaped structure formed by concave in a direction away from the magnetic yoke, and the second folded ring portion is formed to be close to the magnetic yoke The arc-shaped structure formed by the directional depression.
The sound-generating device according to claim 5, wherein the vibration system further comprises a ring-shaped elastic support component and an inner frame arranged at intervals around the magnetic circuit system, the outer peripheral side of the elastic support component is fixed on the the basin frame; the inner frame includes a ring-shaped inner frame body and an inner frame fixing part extending from the inner frame body to the magnetic gap, the ball top and the inner peripheral side of the elastic support assembly are respectively fixed to opposite ends of the inner frame body, and the inner frame fixing portion is fixed to the voice coil.
The sound-emitting device according to claim 1, wherein the main magnetic steel comprises an upper main magnetic steel, a main pole core and a lower main magnetic steel stacked in sequence along the vibration direction of the diaphragm, and the lower main magnetic steel is The magnetic steel is fixed on the magnetic yoke; the magnetic conductive plate further includes a magnetic conductive plate fixing portion bent and extended from the side wall of the magnetic conductive plate in a direction away from the main magnetic steel, the magnetic conductive plate fixing portion It is fixed on the side of the secondary magnet far away from the yoke.
The sound-emitting device according to claim 9, wherein the main magnetic steel has a rectangular structure, the auxiliary magnetic steel includes four, and two auxiliary magnetic steels are located at the long axis of the main magnetic steel respectively. On opposite sides, the other two secondary magnetic steels are located on opposite sides of the long axis of the main magnetic steel respectively; the magnetic conductive plate fixing parts include four, the magnetic conductive plate fixing parts and the auxiliary magnetic steel One-to-one correspondence with steel.