CN112492469A

CN112492469A - Sound production device

Info

Publication number: CN112492469A
Application number: CN202011563425.5A
Authority: CN
Inventors: 肖波; 孔晨亮; 章统; 令狐荣林
Original assignee: AAC Optoelectronic Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; AAC Optoelectronic Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-03-12
Anticipated expiration: 2040-12-25
Also published as: CN112492469B

Abstract

The invention provides a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibration diaphragm, a voice coil, a framework and an elastic supporting assembly; the framework comprises a framework body, a first framework fixing part and a second framework fixing part; the first framework fixing part is fixed on the voice coil; one side of the elastic support component is fixed on the basin frame, and the other side of the elastic support component is fixed on the second framework fixing part; the second framework fixing part comprises a framework bending part bent and extended from the outer periphery of the framework body, a first section of flanging bent and extended from the framework bending part to the direction of the voice coil and a second section of flanging bent and extended from the first section of flanging to the direction of the elastic supporting component, and one end, away from the framework body, of the second section of flanging is fixed on the elastic supporting component. Compared with the related art, the sound production device has good acoustic performance.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of electroacoustic conversion, in particular to a sounding device applied to an electronic sound box product.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.

Related art the sound production device includes the basin frame and is fixed in the vibration system of basin frame and drive respectively the magnetic circuit of vibration system vibration sound production, vibration system is including being annular vibrating diaphragm, drive the voice coil loudspeaker voice coil, the skeleton of vibrating diaphragm vibration sound production and being located the elastic support subassembly in the outside of voice coil loudspeaker voice coil, the vibrating diaphragm with the elastic support subassembly interval sets up relatively, the vibrating diaphragm includes mutual interval setting and is annular first book ring, dome and second book ring, first book ring encircles the dome setting, the dome encircles the second book ring setting, the skeleton includes being annular skeleton body, by the interior circumference side of skeleton body to the first skeleton fixed part of the direction bending extension of voice coil loudspeaker voice coil and by the outside of skeleton body is to the direction bending extension's of keeping away from the elastic support subassembly second skeleton fixed part, the peripheral side of the first folding ring is fixed on the basin frame, the inner peripheral side of the first folding ring and the ball top are both fixed on the framework body, the first framework fixing part is fixed on the voice coil, and the second framework fixing part is fixed on the inner side of the elastic support component; the elastic support component comprises an elastic part and an auxiliary vibrating diaphragm fixed on one side, far away from the vibrating diaphragm, of the elastic part.

However, in the related art, the second frame fixing portion of the sound generating device is fixed on the inner side of the elastic support assembly, and this structure makes the adjustment of the folding ring width of the elastic support assembly limited by the folding ring width of the first folding ring, the film stiffness of the first folding ring is large, which results in poor low-frequency performance of the first folding ring, and meanwhile, the vibration of the first folding ring is also affected by the position of the elastic member, which results in poor acoustic performance of the sound generating device.

Therefore, there is a need to provide a new sound generation device to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a sound production device with good acoustic performance.

In order to achieve the above object, the present invention provides a sound generating device, which includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound, wherein the vibration system includes an annular diaphragm, a voice coil for driving the diaphragm to vibrate and generate sound, a frame, and an elastic support assembly surrounding the magnetic circuit system and spaced from the magnetic circuit system, the diaphragm includes an annular first folded ring, an annular second folded ring, and an annular vibration portion, the first folded ring is disposed around the second folded ring and spaced from the second folded ring, an outer peripheral side of the vibration portion is fixed to a side of the first folded ring close to the second folded ring, an inner peripheral side of the vibration portion is fixed to a side of the second folded ring close to the first folded ring, and an outer peripheral side of the first folded ring is fixed to the frame, the inner peripheral side of the second flange ring is fixed on the magnetic circuit system; the framework comprises an annular framework body, a first framework fixing part and a second framework fixing part, wherein the first framework fixing part is bent and extended from the inner peripheral side of the framework body to the direction of the voice coil, the second framework fixing part is bent and extended from the outer peripheral side of the framework body to the direction far away from the first folding ring, and the framework body is positioned between the first folding ring and the second folding ring and is respectively connected with the inner peripheral side of the first folding ring and the outer peripheral side of the second folding ring and used as the vibration part; the first framework fixing part is fixed on the voice coil; one side of the elastic support component, which is far away from the magnetic circuit system, is fixed on the basin frame, and one side of the elastic support component, which is close to the magnetic circuit system, is fixed on the second framework fixing part; the second framework fixing part comprises a framework bending part bent and extended along the direction of the elastic supporting component and a second section of flanging bent and extended along the direction of the elastic supporting component, wherein the framework bending part is far away from one end of the framework body, the first section of flanging is bent and extended along the direction of the voice coil, the second section of flanging is far away from one end of the framework body, and the elastic supporting component is fixed at one end of the framework body.

Preferably, the first folding ring comprises a first folding ring part in an annular shape, a first vibrating part which is bent and extended from the inner peripheral side of the first folding ring part to the direction close to the vibrating part, and a first fixing part which is bent and extended from the outer peripheral side of the first folding ring part to the direction of the basin frame, the first vibrating part is fixed on the framework body, and the first fixing part is fixed on the basin frame; the second folded ring comprises an annular second folded ring part, a second fixing part and a third fixing part, wherein the second fixing part is bent and extended in the direction that the outer peripheral side of the second folded ring part is close to the vibrating part, the third fixing part is bent and extended in the direction that the inner peripheral side of the second folded ring part is far away from the basin frame, the second fixing part is fixed on the vibrating part, and the third fixing part is fixed on the magnetic circuit system.

Preferably, the elastic support assembly includes an elastic member and an auxiliary diaphragm fixed to a side of the elastic member away from the diaphragm, the elastic member includes a first fixing arm fixed to the frame, a second fixing arm fixed to the second flanged portion, and an elastic arm connecting the second fixing arm and the first fixing arm, the auxiliary diaphragm includes an auxiliary bent portion spaced from and opposite to the elastic arm, a first auxiliary fixing portion extending from a side of the auxiliary bent portion away from the magnetic circuit system and fixed to the first fixing arm, and a second auxiliary fixing portion extending from a side of the auxiliary bent portion close to the magnetic circuit system and fixed to the second fixing arm; the first ring folding part and the auxiliary ring folding part are arranged at intervals and just opposite to each other, and the width of the first ring folding part is smaller than that of the auxiliary ring folding part.

Preferably, the first ring folding part is towards being close to the arc structure that the elastic support component direction is sunken to form, supplementary ring folding part is towards keeping away from the arc structure that the elastic support component direction is sunken to form.

Preferably, the second flange portion is an arc-shaped structure formed by sinking towards a direction away from the magnetic circuit system.

Preferably, the vibration system further includes an annular dome, the dome is clamped between the first folding ring and the second folding ring, the dome is respectively arranged at an interval with the first folding ring and the second folding ring, and the dome is fixed on one side of the skeleton body away from the magnetic circuit system.

Preferably, the voice coil is of a rectangular structure, the number of the elastic support assemblies is two, and the two elastic support assemblies are respectively located on two opposite sides of the voice coil.

Preferably, the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, an auxiliary magnetic steel surrounding the main magnetic steel, and an auxiliary magnetic steel covering the main magnetic steel and away from one side of the magnetic yoke, the auxiliary magnetic steel and the main magnetic steel forming a magnetic gap at an interval, the voice coil is inserted into the magnetic gap, the second folded ring surrounds the auxiliary magnetic steel, and the third fixing portion is connected to the auxiliary magnetic steel.

Preferably, the auxiliary magnetic steel comprises an auxiliary magnetic steel body fixed on the main magnetic steel and an auxiliary magnetic steel extension part formed by protruding the auxiliary magnetic steel body in a direction away from the magnetic yoke, the vibration system further comprises a fixing ring surrounding and fixed on the periphery of the auxiliary magnetic steel extension part, the second fold ring surrounds the fixing ring, and the third fixing part is fixed on the fixing ring.

Preferably, the magnetic circuit system further comprises a main pole core fixed to the main magnetic steel and the auxiliary magnetic steel body in a clamping manner and an auxiliary pole core fixed to one end of the auxiliary magnetic steel far away from the magnetic yoke, the auxiliary pole core comprises an annular auxiliary pole core body fixed to the auxiliary magnetic steel and an auxiliary pole core fixing portion extending from the auxiliary pole core body to the direction of the basin frame, and the auxiliary pole core fixing portion is fixed to the basin frame; the auxiliary pole core fixing parts comprise two auxiliary pole core fixing parts which are respectively located on the other two opposite sides of the voice coil.

Compared with the prior art, the sounding device has the advantages that the second framework fixing part is arranged into the framework bending part, the first section of flanging and the second section of flanging, wherein the framework bending part is formed by bending and extending the outer side of the framework body towards the direction of the elastic support component, the first section of flanging is bent and extended towards the direction of the voice coil from one end, far away from the framework body, of the framework bending part, and the second section of flanging is bent and extended towards the direction of the elastic support component from the first section of flanging; and simultaneously, one end of the second section of flanging, which is far away from the framework body, is fixed on the elastic support component. That is to say, this structure will the second skeleton fixed part to the direction of voice coil loudspeaker voice coil forms the inflection structure, makes the sound production device realize the dog-ear of first dog-ear is narrower, and nimble adjustment when guaranteeing big Standard Deviation (Sd) the width of first dog-ear has reduced the membrane rigidity of first dog-ear, thereby has improved first dog-ear low frequency performance, and this structure can also make the dog-ear of first dog-ear effectively dodges the arm of force of elastic support subassembly, thereby has improved the pure sound effect of sound production device, thereby makes the acoustic performance of sound production device is good.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic perspective view of a sound device according to the present invention;

FIG. 2 is an exploded perspective view of a sound device according to the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

FIG. 4 is an enlarged view of the portion indicated by B in FIG. 3;

FIG. 5 is a schematic perspective view of a skeleton of a sound device according to the present invention;

FIG. 6 is an exploded perspective view of a resilient support assembly of the sound device of the present invention;

fig. 7 is an assembly view of a three-dimensional structure of a diaphragm and a voice coil of a sound device according to the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a sound-producing device 100, wherein the sound-producing device 100 includes a basin frame 1, a vibration system 2 fixed to the basin frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and produce sound. The magnetic circuit system 3 has a magnetic gap 30 and a yoke 31 provided at one end of the frame 1.

The basin stand 1 is annular.

The vibration system 2 comprises an annular vibrating diaphragm 21, a voice coil 22 for driving the vibrating diaphragm 21 to vibrate and sound, a framework 23, an elastic support component 24 surrounding the magnetic circuit system 3 and arranged at an interval with the magnetic circuit system 3, and a fixing ring 25.

The diaphragm 21 and the elastic support component 24 are spaced and arranged oppositely.

Specifically, the diaphragm 21 includes a first annular edge 211, a second annular edge 212, and an annular vibrating portion 213. Wherein the first fold 211 is disposed around the second fold 212 and spaced apart from the second fold 212; the outer peripheral side of the vibration portion 213 is fixed to the first edge 211 on the side closer to the second edge 212, and the inner peripheral side of the vibration portion 213 is fixed to the second edge 212 on the side closer to the first edge 211; the outer peripheral side of the first folding ring 211 is fixed to the frame 1, and the inner peripheral side of the second folding ring 212 is fixed to the magnetic circuit system 3.

The first folding ring 211 is annular and disposed around the magnetic circuit system 3. Specifically, the first edge 211 includes a first edge 2111 having a ring shape, a first vibrating portion 2112 bent and extended in a direction close to the vibrating portion 213 from an inner peripheral side of the first edge 2111, and a first fixing portion 2113 bent and extended in a direction of the frame 1 from an outer peripheral side of the first edge 2111. The first fixing portion 2113 is fixed to the frame 1.

In this embodiment, the first fold 211 further includes a first annular reinforcing portion 2114 bent and extended from the outer peripheral edge of the first fixing portion 2113 along the outer peripheral side of the bowl frame 1. The first reinforcing portion 2114 is fixed to the frame 1. The arrangement of the first reinforcement portion 2114 increases the bonding area of the first corrugated rim 211 and the frame 1, thereby enhancing the reliability of the sound production device 100.

The second fold 212 is annular. The first folding rings 211 surround the second folding rings 212 and are spaced apart from each other. The outer peripheral side of the second edge 212 is fixed to the inner peripheral side of the vibrating portion 213, and the inner peripheral side of the second edge 212 is fixed to the magnetic circuit system 3.

Specifically, the second hinge 212 includes a second hinge portion 2121, a second fixing portion 2122, and a third fixing portion 2123.

The second collar portion 2121 is annular.

In this embodiment, the first hinge portion 2111 has an arc-shaped structure recessed toward the elastic support component 24; the second flange portion 2121 is an arc-shaped structure formed by being recessed in a direction away from the magnetic circuit system 3. This structure makes the arc structure of first collar portion 2111 and the arc structure of second collar portion 2121 be reverse setting to make the acoustic performance of the vibration sound production of vibrating diaphragm 21 is good, also prevents simultaneously that the vibration range too big from causing first collar portion 2111 with the risk of second collar portion 2121 layering, has improved the reliability of vibrating diaphragm 21. Of course, the first hinge portion 2111 may have an arc-shaped structure recessed away from the elastic support component 24.

The second fixing portion 2122 is bent and extended from the outer circumferential side of the second collar portion 2121 toward the vibrating portion 213. The second fixing portion 2122 is fixed to the vibrating portion 213. In this embodiment, the vibration part 213 is fixed to the second fixing part 2122 by gluing.

And a third fixing part 2123 bent from an inner peripheral side of the second loop part 2121 and extending in a direction away from the frame 1. The third fixing part 2123 is fixed to the magnetic circuit system 3.

The vibration portion 213 has a ring shape. The vibration portion 213 is interposed between the first fold ring 211 and the second fold ring 212; the vibration part 213 is spaced apart from the first and

second folding rings

211 and 212, respectively.

The voice coil 22 drives the diaphragm 21 to vibrate and generate sound. The voice coil 22 is inserted into the magnetic gap 30.

The frame 23 includes a frame body 231, a first frame fixing portion 232 and a second frame fixing portion 233.

The frame body 231 is annular. The inner peripheral side of the first tab 211 is fixed to the bobbin body 231. The frame body 231 is located between the first tab 211 and the second tab 212 and is connected to an inner circumferential side of the first tab 211 and an outer circumferential side of the second tab 212, respectively, to serve as the vibration portion 213. Specifically, the first vibration portion 2112 is fixed to the skeleton body 231. Thereby, the first vibration portion 2112 and the skeleton body 231 form an integral structure, so that the acoustic performance of the vibration sound production of the diaphragm 21 is good, and delamination caused by vibration can be prevented.

In this embodiment, the vibration system 2 further includes an annular dome 26, the dome 26 is sandwiched between the first folding ring 211 and the second folding ring 212, the dome 26 is respectively disposed at an interval with the first folding ring 211 and the second folding ring 212, and the dome 26 is fixed to a side of the frame body 231 away from the magnetic yoke 31. This structure makes the dome 26, the first vibration portion 2112, and the skeleton body 231 form an integrated structure, so that the acoustic performance of the vibration sound of the diaphragm 21 is good, and delamination caused by vibration can be prevented.

The first bobbin fixing portion 232 is bent and extended from the inner peripheral side of the bobbin body 231 toward the voice coil 22. The first frame fixing portion 232 is spaced apart from the magnetic circuit system 3. The first bobbin fixing portion 232 is fixed to the voice coil 22. Specifically, the first bobbin fixing portion 232 is fixed to an end of the voice coil 22 far away from the magnetic yoke 31, so that the voice coil 22 drives the diaphragm 21 to vibrate and generate sound through the first bobbin fixing portion 232 and the bobbin body 231.

The second frame fixing portion 233 is bent and extended from the outer peripheral side of the frame body 231 in a direction away from the first folding ring 211. The second frame fixing portion 233 is used for fixing the elastic support member 24. Specifically, the second frame fixing portion 233 is fixed to the inner side of the elastic support member 24.

Specifically, the second bobbin fixing portion 233 includes a bobbin bending portion 2331 bent from the outer peripheral side of the bobbin body 231 toward the elastic support member 24, a first flanged edge 2332 bent from one end of the bobbin bending portion 2331 away from the bobbin body 231 toward the voice coil 22, and a second flanged edge 2333 bent from the first flanged edge 2332 toward the elastic support member 24. The second frame fixing portion is folded inward toward the voice coil, and one end of the second section of the flange 2333, which is far away from the frame body 231, is fixed to the elastic support assembly 24. This structure can the sound production device realizes first dog-ear 211 first dog-ear portion 2111 is narrower, and nimble adjustment when guaranteeing big Standard Deviation (Standard development, Sd for short) first dog-ear 211's width has reduced first dog-ear 211's membrane rigidity, thereby has improved first dog-ear 211 low frequency performance, this structure can also make first dog-ear 211 first dog-ear portion 2111 effectively dodges the arm of force of elastic support subassembly 24, thereby has improved the pure sound effect of sound production device 100, thereby makes sound production device 100's acoustic performance is good.

The resilient support member 24 is annular. The resilient support members 24 are spaced around the magnetic circuit system 3. Specifically, the side of the elastic support assembly 24 away from the magnetic circuit system 3 is fixed to the frame 1, and the side of the elastic support assembly 24 close to the magnetic circuit system 3 is fixed to the second frame fixing portion 233, so that the elastic support assembly 24 balances the vibration of the voice coil 22.

Specifically, the elastic support assembly 24 includes an elastic member 241 and an auxiliary diaphragm 242 fixed to a side of the elastic member 241 away from the diaphragm 21.

The elastic member 241 is a flexible circuit board, and the voice coil 22 is electrically connected to the elastic member 241. This structure effectively reduces the risk that the lead wire of the voice coil is not easily broken due to vibration when vibrating, thereby improving the reliability of the sound production device 100.

Specifically, the elastic member 241 includes a first fixing arm 2411 fixed to the frame 1, a second fixing arm 2412 fixed to the second turned-over edge 2333, and a resilient arm 2413 connecting the second fixing arm 2412 and the first fixing arm 2411.

The auxiliary diaphragm 242 includes an auxiliary hinge part 2423 spaced and facing the elastic arm 2413, a first auxiliary fixing part 2421 extending from a side of the auxiliary hinge part 2423 away from the magnetic circuit system 3 and fixed to the first fixing arm 2411, and a second auxiliary fixing part 2422 extending from a side of the auxiliary hinge part 24123 close to the magnetic circuit system 3 and fixed to the second fixing arm 2412.

The first hinge portion 2111 and the auxiliary hinge portion 2423 are spaced and oppositely disposed. The width of the first hinge portion 2111 is smaller than that of the auxiliary hinge portion 2423, and this structure reduces the membrane stiffness of the first hinge 211, so that the low-frequency performance of the first hinge 211 is improved, and the acoustic performance of the vibration sound of the diaphragm 21 is good.

In this embodiment, the voice coil 22 has a rectangular structure, and the elastic support assembly 24 includes two pieces. Two of the resilient support members 24 are located on opposite sides of the voice coil 22. This structure makes the support of the voice coil 22 by the elastic support component 24 more stable, and the vibration reliability is better, so that the acoustic performance of the vibration sound production of the diaphragm 21 is good.

In this embodiment, the auxiliary loop part 2423 is an arc structure that is recessed in a direction away from the elastic support component 24, that is, the auxiliary loop part 2423 is an arc structure that is recessed in a direction close to the magnetic circuit system 3. The structure enables the arc-shaped structure of the first hinge part 2111 and the arc-shaped structure of the auxiliary hinge part 2423 to be arranged in the same direction, so that the acoustic performance of vibration sounding of the diaphragm 21 is good, meanwhile, the first hinge part 2111 is ensured to have enough vibration amplitude space, and the reliability of the diaphragm 21 is improved.

The fixing ring 25 is annular.

The fixing ring 25 is used to connect the second corrugated ring 212 to the magnetic circuit system 3. The third fixing portion 2123 is bent from the inner peripheral side of the second collar portion 2121 and extends in a direction toward the fixing ring 25. The second collar 212 is disposed around the fixed ring 25.

The second flange 212 is fixed to the fixing ring 25. The inner peripheral side of the second edge 212 is fixed to the outer peripheral side of the fixed ring 25. Specifically, the third fixing portion 2123 is fixed to the outer peripheral side of the fixing ring 25.

The fixing ring 25 is a metal ring. Wherein, the hardness of the metal material used for manufacturing the fixing ring 25 is greater than the hardness of the diaphragm 21, and the fixing ring 25 is used for fixing the diaphragm 21 to the magnetic circuit system 3.

In this embodiment, the fixing ring 25 is a steel ring. The material choice of the steel ring makes the construction simple and easy to assemble.

The magnetic circuit system 3 includes a magnetic yoke 31, a main magnetic steel 32, a sub magnetic steel 33, a sub magnetic steel 34, a fixing ring 25, a main pole core 35, and a sub pole core 36.

The magnetic yoke 31 and the diaphragm 21 are respectively located on two opposite sides of the basin stand 1.

The main magnet steel 32 is fixed to the yoke 31.

The sub magnetic steel 33 is fixed to the yoke 31. The secondary magnetic steel 33 surrounds the primary magnetic steel 32. The secondary magnetic steel 33 and the primary magnetic steel 32 are spaced to form the magnetic gap 30, and the voice coil 22 is inserted into the magnetic gap 30.

The auxiliary magnetic steel 34 covers the side of the main magnetic steel 32 far away from the magnetic yoke 31. The second fold ring 212 is disposed around the auxiliary magnetic steel 34. The third fixing part 2123 is connected to the auxiliary magnetic steel 34.

Specifically, the auxiliary magnetic steel 34 includes an auxiliary magnetic steel body 341 and an auxiliary magnetic steel extension 342.

The auxiliary magnetic steel body 341 is fixed to a side of the main magnetic steel 32 away from the magnetic yoke 31. The first frame fixing portions 232 are spaced apart from and surround the auxiliary magnetic steel body 341. The second fixing part 2122 is fixed to one side of the first frame fixing part 232 close to the auxiliary magnetic steel body 341.

The auxiliary magnetic steel extension 342 is formed by protruding the auxiliary magnetic steel body 341 in a direction away from the magnetic yoke 31.

The fixing ring 25 is used for fixing the second folding ring 212 to the auxiliary magnetic steel 34. The fixing ring 25 is sleeved on the auxiliary magnetic steel 34 and forms a fixed connection. Specifically, the fixing ring 25 is sleeved on the auxiliary magnetic steel extension portion 342 and is fixedly connected with the auxiliary magnetic steel body 341.

The main pole core 35 is fixed to the main magnet steel 32 and the auxiliary magnet steel body 341 in a sandwiched manner.

The secondary pole core 36 is fixed to an end of the secondary magnetic steel 33 away from the magnetic yoke 31.

The auxiliary pole core 36 includes an annular auxiliary pole core body 361 fixed to the auxiliary magnetic steel 33, and an auxiliary pole core fixing portion 362 extending from the auxiliary pole core body 361 to the direction of the tub frame 1, wherein the magnetic circuit system 3 is fixed to the tub frame 1. Specifically, the auxiliary pole core fixing part 362 is fixed to the frame 1. Of course, in other embodiments, the fixing of the yoke 31 to the frame 1 is also possible.

In the present embodiment, the auxiliary pole core fixing portion 362 includes two. The two auxiliary pole core fixing portions 362 are respectively located on the other opposite sides of the voice coil 22. The structure is fixed on the basin frame 1 through the two auxiliary pole core fixing parts 362, so that the reliability of the fixing structure of the magnetic circuit system 3 and the basin frame 1 is higher.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A sounding device comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate and sound,

the vibration system comprises an annular vibrating diaphragm, a voice coil for driving the vibrating diaphragm to vibrate and sound, a framework and an elastic supporting assembly which surrounds the magnetic circuit system and is arranged at an interval with the magnetic circuit system, the vibrating diaphragm comprises an annular first folding ring, an annular second folding ring and an annular vibration part, the first folding ring is arranged around the second folding ring and is mutually spaced with the second folding ring, the outer peripheral side of the vibration part is fixed on one side of the first folding ring close to the second folding ring, the inner peripheral side of the vibration part is fixed on one side of the second folding ring close to the first folding ring, the outer peripheral side of the first folding ring is fixed on the basin frame, and the inner peripheral side of the second folding ring is fixed on the magnetic circuit system;

the framework comprises an annular framework body, a first framework fixing part and a second framework fixing part, wherein the first framework fixing part is bent and extended from the inner peripheral side of the framework body to the direction of the voice coil, the second framework fixing part is bent and extended from the outer peripheral side of the framework body to the direction far away from the first folding ring, and the framework body is positioned between the first folding ring and the second folding ring and is respectively connected with the inner peripheral side of the first folding ring and the outer peripheral side of the second folding ring and used as the vibration part; the first framework fixing part is fixed on the voice coil; one side of the elastic support component, which is far away from the magnetic circuit system, is fixed on the basin frame, and one side of the elastic support component, which is close to the magnetic circuit system, is fixed on the second framework fixing part;

the voice coil is characterized in that the second framework fixing part comprises a framework bending part bent and extended along the direction of the elastic supporting component and a second section flanging bent and extended along the direction of the elastic supporting component, wherein the framework bending part is far away from one end of the framework body, the first section flanging is bent and extended along the direction of the voice coil, and the second section flanging is far away from one end of the framework body and is fixed on the elastic supporting component.

2. The sounding device according to claim 1, wherein the first corrugated rim comprises a first corrugated rim portion in a ring shape, a first vibrating portion bent and extended from an inner peripheral side of the first corrugated rim portion to a direction close to the vibrating portion, and a first fixing portion bent and extended from an outer peripheral side of the first corrugated rim portion to a direction of the frame, the first vibrating portion is fixed to the frame body, and the first fixing portion is fixed to the frame; the second folded ring comprises an annular second folded ring part, a second fixing part and a third fixing part, wherein the second fixing part is bent and extended in the direction that the outer peripheral side of the second folded ring part is close to the vibrating part, the third fixing part is bent and extended in the direction that the inner peripheral side of the second folded ring part is far away from the basin frame, the second fixing part is fixed on the vibrating part, and the third fixing part is fixed on the magnetic circuit system.

3. The sounding device according to claim 2, wherein the elastic support assembly comprises an elastic member and an auxiliary diaphragm fixed on a side of the elastic member away from the diaphragm, the elastic member comprises a first fixing arm fixed on the frame, a second fixing arm fixed on the second flanged edge, and an elastic arm connecting the second fixing arm and the first fixing arm, the auxiliary diaphragm comprises an auxiliary folded ring portion spaced and opposite to the elastic arm, a first auxiliary fixing portion extending from a side of the auxiliary folded ring portion away from the magnetic circuit system and fixed on the first fixing arm, and a second auxiliary fixing portion extending from a side of the auxiliary folded ring portion close to the magnetic circuit system and fixed on the second fixing arm; the first ring folding part and the auxiliary ring folding part are arranged at intervals and just opposite to each other, and the width of the first ring folding part is smaller than that of the auxiliary ring folding part.

4. The sounding device according to claim 3, wherein the first hinge portion is formed in an arc-shaped structure which is recessed towards the elastic support component, and the auxiliary hinge portion is formed in an arc-shaped structure which is recessed towards the elastic support component.

5. The sounding device according to claim 4, wherein the second flange portion is formed in an arc-shaped structure recessed away from the magnetic circuit system.

6. The sounding device according to claim 1, wherein the vibration system further comprises a ring-shaped dome, the dome is sandwiched between the first and second flanges, the dome is spaced apart from the first and second flanges, and the dome is fixed to a side of the frame body away from the magnetic circuit system.

7. The sounder device according to claim 2, wherein the voice coil is of a rectangular configuration, and the resilient support members comprise two, one on each of opposite sides of the voice coil.

8. The sounding device as claimed in claim 7, wherein the magnetic circuit system comprises a magnetic yoke, a main magnetic steel and a secondary magnetic steel surrounding the main magnetic steel respectively fixed to the magnetic yoke, and a secondary magnetic steel covering a side of the main magnetic steel away from the magnetic yoke, the secondary magnetic steel and the main magnetic steel being spaced to form a magnetic gap, the voice coil being inserted into the magnetic gap, the second folded ring being disposed around the secondary magnetic steel, and the third fixing portion being connected to the secondary magnetic steel.

9. The sounding device according to claim 8, wherein the auxiliary magnetic steel includes an auxiliary magnetic steel body fixed to the main magnetic steel and an auxiliary magnetic steel extension portion formed by the auxiliary magnetic steel body protruding in a direction away from the magnetic yoke, the vibration system further includes a ring-shaped fixing ring surrounding and fixed to a periphery of the auxiliary magnetic steel extension portion, the second flange is disposed around the fixing ring, and the third fixing portion is fixed to the fixing ring.

10. The sounding device according to claim 8, wherein the magnetic circuit system further comprises a main pole core sandwiched and fixed between the main magnetic steel and the auxiliary magnetic steel body, and an auxiliary pole core fixed at an end of the auxiliary magnetic steel away from the magnetic yoke, the auxiliary pole core comprises an annular auxiliary pole core body fixed to the auxiliary magnetic steel and an auxiliary pole core fixing portion extending from the auxiliary pole core body to the tub frame, and the auxiliary pole core fixing portion is fixed to the tub frame; the auxiliary pole core fixing parts comprise two auxiliary pole core fixing parts which are respectively located on the other two opposite sides of the voice coil.