WO2022110505A1

WO2022110505A1 - Sound generating device

Info

Publication number: WO2022110505A1
Application number: PCT/CN2020/142284
Authority: WO
Inventors: 金鑫; 张帆; 钟志威
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-11-30
Filing date: 2020-12-31
Publication date: 2022-06-02
Also published as: CN112584285A

Abstract

The present invention provides a sound generating device, comprising a basket, a vibration system, and a magnetic circuit system. The vibration system comprises a diaphragm and a voice coil; the magnetic circuit system comprises a magnetic bowl and a magnetic steel; the basket comprises a basket top wall used for supporting and fixing the diaphragm, and a basket bottom wall; the basket bottom wall comprises a basket fixing portion recessed from the basket bottom wall to a position close to the diaphragm and a basket positioning portion extending from the basket bottom wall to a position close to the magnetic bowl; the magnetic bowl comprises a magnetic bowl body, a magnetic bowl sidewall bending and extending from the magnetic bowl body, a magnetic bowl extension portion bending and extending from the magnetic bowl sidewall, and a magnetic bowl fixing portion protruding and extending from the magnetic bowl extension portion; the magnetic steel is fixed to the magnetic bowl body; the magnetic bowl sidewall is fixed to the basket; the magnetic bowl extension portion matches the basket positioning portion to position the magnetic bowl in a vibration direction perpendicular to the diaphragm; and the magnetic bowl fixing portion is fixedly connected to the basket fixing portion. Compared with the related art, the sound generating device of the present invention is simple in structure, high in strength, easy to assemble and position, and high in reliability.

Description

sound device

technical field

The invention 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 magnetic circuit system includes a magnetic bowl fixed to the basin frame and a magnetic circuit system. The magnetic steel accommodated in the magnetic bowl is glued and fixed with the basin frame.

However, the basin frame of the sound-emitting device in the related art is generally made of plastic, and the strength of the plastic is not easy to cause deformation of the sound-emitting device. In addition, since the magnetic bowl and the basin frame are glued and fixed, the magnetic bowl and the basin frame are easy to move when the glue is fixed, which makes the positioning of the magnetic circuit system difficult, resulting in low reliability of the sounding device.

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

technical problem

The purpose of the present invention is to provide a sounding device with simple structure, high strength, easy assembly and positioning, and high reliability.

technical solutions

In order to achieve the above object, the present invention provides a sound-generating device, which includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and sound, and the vibration system includes a vibration system fixed to the basin frame. The vibrating membrane of the basin frame and the voice coil that drives the vibrating membrane to vibrate, the magnetic circuit system includes a magnetic bowl fixed on the basin frame and a magnetic steel accommodated in the magnetic bowl, and the magnetic bowl includes a magnetic bowl a main body and a magnetic bowl side wall bent and extended from the periphery of the magnetic bowl main body to the direction of the vibrating film, the magnetic steel is fixed on the magnetic bowl main body and is spaced apart from the magnetic bowl side wall to form a magnetic gap, The side wall of the magnetic bowl is fixed on the basin frame, the voice coil is inserted into the magnetic gap, and the basin frame includes a basin frame top wall for supporting and fixing the diaphragm, and a basin frame top wall for supporting and fixing the diaphragm. The bottom wall of the basin frame with opposite walls, the bottom wall of the basin frame includes a basin frame fixing part formed by concave from the bottom wall of the basin frame to the direction close to the vibrating membrane, A basin frame positioning portion extending from the magnetic bowl; the magnetic bowl further includes a magnetic bowl extension portion bent and extended from the magnetic bowl sidewall toward the basin frame, and a magnetic bowl extension portion extending from the magnetic bowl extension portion to the basin frame The magnetic bowl fixing part protrudes and extends in the direction of the fixing part; the magnetic bowl extension part cooperates with the basin frame positioning part to locate the magnetic bowl along the vibration direction perpendicular to the diaphragm, the magnetic bowl The fixing part is fixedly connected with the fixing part of the basin frame.

Preferably, the pot frame is made of metal material, and the part of the side of the magnetic bowl fixing portion away from the side wall of the magnetic bowl that is in contact with the pot frame fixing portion is welded by laser.

Preferably, the basin frame fixing parts include two, the two basin frame fixing parts are respectively located on opposite sides of the long axis of the basin frame, and the basin frame positioning parts include two, each of the basin frame The positioning part is located on the same side of the long axis of the basin frame as the adjacent one of the basin frame fixing parts; the magnetic bowl is in a rectangular structure, and the magnetic bowl fixing parts include two, two magnetic bowl fixing parts They are respectively located on opposite sides of the long axis of the magnetic bowl, and the magnetic bowl fixing parts are in one-to-one correspondence with the basin frame fixing parts.

Preferably, the vibrating membrane includes a vibrating portion, a ring portion bent and extended from the outer periphery of the vibrating portion, and a connecting portion bent and extended from the ring portion to the basin frame, and the voice coil is fixed In the vibrating part, the connecting part is fixed on the top wall of the basin frame, the folded ring part has an arc-shaped structure formed by concave in the direction close to the magnetic bowl, and is arranged opposite to the fixing part of the basin frame, The distance between the folded ring portion and the basin frame fixing portion is greater than the maximum vibration amplitude of the folded ring portion.

Preferably, the diaphragm further includes a ring-shaped reinforcing portion which is bent and extended from the outer periphery of the connecting portion along the extending direction of the top wall of the basin frame, and the reinforcing portion is fixed on the top wall of the basin frame .

Preferably, the vibration system further includes an elastic support assembly and a skeleton fixed on the side of the vibration part close to the magnetic circuit system, the elastic support assembly includes two, and the two elastic support assemblies are respectively located in the On the opposite sides of the short axis of the magnetic bowl, one end of the elastic support component is fixed on the top wall of the basin frame, and the other end is fixed on the frame; the voice coil is connected to the diaphragm through the frame.

Preferably, the skeleton includes a ring-shaped skeleton body fixed on the vibrating portion, a first skeleton fixing portion extending from the outer peripheral edge of the skeleton body to the magnetic gap, and an inner perimeter of the skeleton body A second frame fixing portion extending toward the voice coil, the elastic support component is connected to an end of the first frame fixing portion away from the frame body, and the voice coil is connected to the second frame fixing portion.

beneficial effect

Compared with the related art, the sound-emitting device of the present invention divides the basin frame structure into a basin frame top wall and a basin frame bottom wall which are oppositely arranged, and then sets the basin frame bottom wall from the basin frame bottom wall to the vicinity of the basin frame. A basin frame fixing part formed by the concave direction of the vibrating membrane and a basin frame positioning part extending from the bottom wall of the basin frame to the magnetic bowl; meanwhile, the magnetic bowl is arranged from the side wall of the magnetic bowl to the basin frame The magnetic bowl extension part is bent and extended in the direction of the magnetic bowl extension part and the magnetic bowl fixing part which protrudes and extends from the magnetic bowl extension part to the direction of the basin frame fixing part, and then the magnetic bowl extension part is positioned with the basin frame The magnetic bowl is positioned along the vibration direction perpendicular to the vibrating membrane, the magnetic bowl fixing part is fixedly connected with the basin frame fixing part, and the structure uses the position of the magnetic bowl fixing part as the The height positioning surface of the magnetic bowl makes the assembly and positioning of the magnetic circuit system and the basin frame accurate, and at the same time ensures that sufficient vibration space for the vibration system is reserved; The basin frame positioning part is matched, and the structure utilizes the setting of the basin frame positioning part to position the magnetic circuit system along the vibration direction perpendicular to the diaphragm, that is, the long axis and the short axis of the basin frame. The positioning of the axes is accurate in both dimensions. In addition, the fixed connection between the magnetic bowl and the bowl frame makes the structure simple, and the movement of the bowl frame and the magnetic bowl is not easy to occur, which effectively ensures the stability of the fixation of the bowl frame and the magnetic bowl. , thereby improving the reliability 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 accompanying drawings in the following description are only some embodiments of the present invention. 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 three-dimensional 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;

4 is a schematic diagram of the three-dimensional structure assembly of the magnetic bowl and the basin frame of the sound-emitting device of the present invention;

5 is a schematic diagram of the three-dimensional structure assembly of the magnetic bowl and the basin frame of the sound-emitting device of the present invention at another angle;

FIG. 6 is a schematic three-dimensional structure diagram of the basin frame of the sound-emitting device of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

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

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 fixed to the basin frame 1, and a magnet for driving the vibration system 2 to vibrate and emit sound. Road system 3. Wherein, the vibrating system 2 includes a vibrating membrane 21 for producing sound.

In this embodiment, the basin frame 1 is made of metal. The basin frame 1 made of metal has relatively high hardness and is not easy to be deformed during use and assembly, thereby improving the reliability of the sound-emitting device 100 .

Specifically, the basin frame 1 includes a basin frame top wall 11 and a basin frame bottom wall 12 disposed opposite to the basin frame top wall 11 .

The basin frame 1 has a rectangular structure. The top wall 11 of the basin frame is used for fixing the vibration system 2 . Specifically, the top wall 11 of the basin frame is used to support and fix the diaphragm 21 .

The basin frame bottom wall 12 includes a basin frame fixing portion 121 recessed from the basin frame bottom wall 12 to the direction close to the diaphragm 21 and extending from the basin frame bottom wall 12 to the magnetic bowl 31 . The basin frame positioning part 122.

In this embodiment, the basin frame fixing portion 121 is used for fixing with the magnetic circuit system 3 by laser welding.

In this embodiment, the basin frame fixing portion 121 includes two. The two basin frame fixing portions 121 are respectively located on opposite sides of the long axis of the basin frame 1 .

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

The diaphragm 21 is fixed on the side of the top wall 11 of the basin frame away from the magnetic bowl 31 .

The vibrating membrane 21 includes a vibrating portion 211 , a ring portion 212 bent and extended from the outer periphery of the vibrating portion 211 , and a connecting portion 213 bent and extended from the ring portion 212 to the basin frame 1 .

The connecting portion 213 is fixed to the top wall 11 of the basin frame.

The folded ring portion 212 is in an arc-shaped structure formed by being recessed toward the magnetic bowl 31 , and is disposed opposite to the basin frame fixing portion 121 . The distance between the folded ring portion 212 and the basin frame fixing portion 121 is greater than the maximum vibration amplitude of the folded ring portion 212 .

In this embodiment, in order to enhance the fixing strength of the diaphragm 21 and the top wall 11 of the basin frame, the diaphragm 21 further includes a diaphragm 21 extending along the top wall 11 of the basin frame by the outer periphery of the connecting portion 213 . The annular reinforcing portion 214 is bent and extended in the direction. The reinforcing portion 214 is fixed to the top wall 11 of the basin frame. When the diaphragm 21 vibrates and emits sound, this structure prevents the diaphragm 21 from falling off from the top wall 11 of the basin frame, resulting in poor acoustic effect of the sound-emitting device 100 , thereby making the sound-emitting device 100 highly reliable. .

The voice coil 22 is used to drive the diaphragm 21 to vibrate and produce sound. The voice coil 22 is fixed to the vibration part 211 . Specifically, the voice coil 22 is connected to the diaphragm 21 through the frame 24 .

The elastic support assembly 23 is fixed to the basin frame 1 . Specifically, one end of the elastic support component 23 is fixed to the top wall 11 of the basin frame, and the other end is fixed to the frame 24 . The elastic support assembly 23 is used to balance the vibration of the voice coil 22 , and the support of the voice coil 22 by the elastic support assembly 23 is more stable and the vibration reliability is better.

The frame 24 is fixed to the side of the vibrating portion 211 close to the magnetic circuit system 3 . The frame 24 includes a ring-shaped frame body 241 fixed to the vibration portion 211 , a frame fixing portion 242 extending from the outer periphery of the frame body 241 to the voice coil 22 , and a frame body 241 . The inner peripheral edge of the second frame fixing portion 243 extends toward the voice coil 22 . The elastic support component 23 is connected to an end of the first frame fixing portion 242 away from the frame body 241 , and the voice coil 22 is connected to the second frame fixing portion 243 . This structure enables the voice coil 22 to drive the diaphragm 21 to vibrate and produce sound through the skeleton 24, and at the same time connect the elastic support component 23 to make the vibration balance and feasibility high.

The magnetic circuit system 3 includes a magnetic bowl 31 and a magnetic steel 32 accommodated in the magnetic bowl 31 .

The magnetic bowl 31 is fixed to the basin frame 1 . Specifically, the magnetic bowl 31 includes a magnetic bowl body 311 , a magnetic bowl side wall 312 bent and extended from the periphery of the magnetic bowl body 311 to the direction of the diaphragm 21 , and a magnetic bowl side wall 312 extending from the magnetic bowl side wall 312 to the direction of the diaphragm 21 . The magnetic bowl extension portion 313 bent and extended in the direction of the bowl frame 1 and the magnetic bowl fixing portion 314 protruded and extended in the direction of the bowl frame fixing portion 121 from the magnetic bowl extension portion 313 .

The magnetic bowl body 311 is used for fixing the magnetic steel 32 . The magnetic bowl body 311 and the diaphragm 21 are respectively located on opposite sides of the sound generating device 100 .

The side wall 312 of the magnetic bowl is fixed to the basin frame 1 .

The magnetic bowl extension 313 is used for assembling and positioning the magnetic circuit system 3 , and at the same time, it also ensures that sufficient vibration space for the vibration system 2 is reserved.

In this embodiment, the basin frame positioning portion 122 includes two, each of the basin frame positioning portions 122 and the adjacent one of the basin frame fixing portions 12 are located on the same side of the long axis of the basin frame 1 . The provision of the two basin frame positioning portions 122 is conducive to the assembly and positioning of the magnetic circuit system 3 and the basin frame 1 .

The magnetic bowl extending portion 313 cooperates with the basin frame positioning portion 122 to position the magnetic bowl 31 in a direction perpendicular to the vibration direction of the diaphragm 21 , and the magnetic bowl fixing portion 314 is fixed to the basin frame. This structure is used for the assembly and positioning of the magnetic circuit system 3 and the basin frame 1. Specifically, this structure uses the position of the magnetic bowl fixing portion 314 as the height positioning surface of the magnetic bowl 31. The magnetic circuit system 3 and the basin frame 1 are assembled and positioned accurately, and at the same time, sufficient vibration space for the vibration system 2 is reserved, that is, the structure ensures that the ring portion 212 is connected to the basin frame. The distance of the fixing portion 121 is greater than the maximum vibration amplitude of the ring portion 212 . At the same time, the magnetic bowl extension portion 313 is sandwiched in the basin frame positioning portion 122 matched with the magnetic bowl extension portion 313 . The diaphragm 21 is positioned in the vibration direction, so that the magnetic circuit system 3 can be positioned accurately in the two dimensions of the long axis and the short axis of the basin frame 1 .

In this embodiment, the side of the magnetic bowl fixing portion 314 away from the magnetic bowl side wall 312 is in contact with the bowl frame fixing portion 121 by laser welding. By fixing by laser welding, on the one hand, the pot frame fixing part 121 and the magnetic bowl fixing part 314 can be welded more firmly, and the reliability is improved; The outer side and the outer side of the magnetic bowl 31 are operated, and the laser oblique welding operation is simple, which is conducive to the production and assembly of the sound-emitting device 100 and is conducive to mass production.

The side of the magnetic bowl fixing portion 314 away from the magnetic bowl side wall 312 and the side of the magnetic bowl fixing portion 314 close to the bowl frame fixing portion 121 are provided with fusion protrusions 4 . The fusion protrusion 4 is formed by fusing the metal material of the pot frame fixing portion 121 and the material of the magnetic bowl fixing portion 314 by laser welding. The magnetic bowl fixing portion 314 and the bowl frame fixing portion 121 are welded and fixed by the fusion protrusion 4 . The fusion protrusion 4 is located at the connection between the magnetic bowl fixing portion 314 and the basin frame fixing portion 121 .

In this embodiment, the fusion protrusions 4 include a plurality of fusion protrusions 4, and the plurality of fusion protrusions 4 are symmetrically distributed on the magnetic bowl fixing portion 314 and the basin frame fixing portion 312 at intervals. Symmetrically distributed spot welding forms a plurality of the fusion protrusions 4. This structure makes the assembly process simple, and makes the pot frame fixing part 121 and the magnetic bowl fixing part 314 welded more firmly, which improves the sound generation device. 100 reliability.

In this embodiment, the fusing protrusions 4 include a first fusing protrusion 41 located at the fixing portion 121 of the bowl frame and a second fusing protrusion 42 located in the magnetic bowl extending portion 313 . The first fusion protrusion 41 and the second fusion protrusion 42 are connected to form an integrated structure. On the one hand, this structure makes full use of the simple operation of laser oblique welding, which is conducive to the production and assembly of the sounding device 100 and is conducive to mass production. On the other hand, the basin frame fixing part 121 and the magnetic bowl fixing part can be The 314 is soldered more strongly and improves reliability.

The magnetic steel 32 is fixed to the magnetic bowl body 311 and is spaced apart from the magnetic bowl side wall 312 to form a magnetic gap 30 . The voice coil 22 is inserted into the magnetic gap 30 . The first frame fixing portion 242 extends from the outer periphery of the frame body 241 to the magnetic gap 30 .

In this embodiment, the magnetic bowl 31 has a rectangular structure. The magnetic bowl fixing portion 314 includes two, and the two magnetic bowl fixing portions 314 are respectively located on opposite sides of the long axis of the magnetic bowl 31 . The symmetrically arranged magnetic bowl fixing parts 314 make the basin frame 1 and the magnetic bowl 31 more solidly combined, improve the reliability of the sounding device 100, and at the same time make the magnetic circuit system 3 and the magnetic bowl 31 more solid. The assembling and positioning of the basin frame 1 is more precise, which ensures the reliability of the folding ring portion 312 under the condition of maximum vibration. More preferably, the magnetic bowl fixing portions 314 are in one-to-one correspondence with the basin frame fixing portions 121 . The symmetrically arranged basin frame fixing parts 121 make the basin frame fixing part 121 and the magnetic bowl fixing part 314 welded and combined more firmly, which improves the reliability of the sounding device 100 .

The two elastic support assemblies 23 are located on opposite sides of the short axis of the magnetic bowl 31 respectively, and the two elastic support assemblies 23 are symmetrically distributed to the voice coil. 22 has more stable support and better vibration reliability.

The above are only the embodiments of the present invention. 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 invention, but these belong to the present invention. scope of protection.

Claims

A sound-generating device, which includes a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound, the vibration system includes a vibrating membrane fixed on the basin frame and drives the A voice coil vibrating with a diaphragm, the magnetic circuit system includes a magnetic bowl fixed on the basin frame and a magnetic steel accommodated in the magnetic bowl, the magnetic bowl includes a magnetic bowl body and a magnetic bowl formed by the magnetic bowl body. The sidewall of the magnetic bowl is bent and extended from the periphery to the direction of the diaphragm, the magnetic steel is fixed on the body of the magnetic bowl and is spaced from the sidewall of the magnetic bowl to form a magnetic gap, and the sidewall of the magnetic bowl is fixed on the magnetic bowl. The basin frame, wherein the voice coil is inserted into the magnetic gap, is characterized in that, the basin frame comprises a basin frame top wall for supporting and fixing the diaphragm and a basin arranged opposite to the basin frame top wall The bottom wall of the pot frame, the bottom wall of the pot frame includes a pot frame fixing part formed by concave from the bottom wall of the pot frame to the direction close to the diaphragm, and a pot extending from the bottom wall of the pot frame to the direction close to the magnetic bowl a frame positioning part; the magnetic bowl further includes a magnetic bowl extension part bent and extended from the magnetic bowl side wall in the direction of the basin frame, and a protrusion from the magnetic bowl extension part in the direction of the basin frame fixing part an extending magnetic bowl fixing part; the magnetic bowl extending part cooperates with the basin frame positioning part to position the magnetic bowl in the vibration direction perpendicular to the diaphragm, and the magnetic bowl fixing part and the The basin frame fixing part is fixedly connected.
The sound-generating device according to claim 1, wherein the pot frame is made of a metal material, and a side of the magnetic bowl fixing portion away from the side wall of the magnetic bowl is in contact with the pot frame fixing portion By laser welding.
The sound-generating device according to claim 1, wherein the basin frame fixing parts comprise two, and the two basin frame fixing parts are respectively located on opposite sides of the long axis of the basin frame, and the basin frame is positioned Each of the basin frame positioning parts and the adjacent one of the basin frame fixing parts are located on the same side of the long axis of the basin frame; the magnetic bowl has a rectangular structure, and the magnetic bowl fixing part includes Two, the two magnetic bowl fixing parts are respectively located on opposite sides of the long axis of the magnetic bowl, and the magnetic bowl fixing parts are in one-to-one correspondence with the basin frame fixing parts.
The sound-generating device according to claim 3, wherein the vibrating membrane comprises a vibrating part, a ring part bent and extended from the outer periphery of the vibrating part, and a ring part bent toward the basin frame by the ring part The connecting part is folded and extended, the voice coil is fixed on the vibration part, the connecting part is fixed on the top wall of the basin frame, and the folding ring part has an arc structure formed by concave in the direction close to the magnetic bowl. It is disposed opposite to the basin frame fixing part, and the distance between the folding ring part and the basin frame fixing part is greater than the maximum vibration amplitude of the folding ring part.
The sound-generating device according to claim 4, wherein the diaphragm further comprises a ring-shaped reinforcing portion bent and extended from the outer periphery of the connecting portion along the extending direction of the top wall of the basin frame, so The reinforcing part is fixed on the top wall of the basin frame.
The sound-generating device according to claim 5, wherein the vibration system further comprises an elastic support assembly and a skeleton fixed on a side of the vibration part close to the magnetic circuit system, the elastic support assembly includes two, The two elastic support components are respectively located on opposite sides of the short axis of the magnetic bowl, one end of the elastic support components is fixed on the top wall of the basin frame, and the other end is fixed on the frame; the voice coil passes through The skeleton is connected to the diaphragm.
The sound-generating device according to claim 6, wherein the skeleton comprises a ring-shaped skeleton body fixed to the vibrating part, and a first skeleton extending from the outer peripheral edge of the skeleton body to the magnetic gap a fixing part and a second skeleton fixing part extending from the inner periphery of the skeleton body to the voice coil; the elastic support component is connected to an end of the first skeleton fixing part away from the skeleton body; the voice coil connected to the second frame fixing portion.