WO2022110430A1

WO2022110430A1 - Sound production device

Info

Publication number: WO2022110430A1
Application number: PCT/CN2020/139073
Authority: WO
Inventors: 金鑫; 钟志威
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: 2020-11-30
Filing date: 2020-12-24
Publication date: 2022-06-02
Also published as: CN214177550U

Abstract

Provided is a sound production device, comprising a cone frame, a vibrating system and a magnetic circuit system, wherein the vibrating system comprises a vibrating diaphragm and a voice coil; the magnetic circuit system comprises a magnetic bowl and magnetic steel; the magnetic bowl comprises a magnetic bowl body, and a magnetic bowl side wall, which is bent and extends from the periphery of the magnetic bowl body in the direction of the vibrating diaphragm; the magnetic steel is fixed to the magnetic bowl body and is spaced apart from the magnetic bowl side wall; the magnetic bowl side wall is fixed to the cone frame; the cone frame comprises an annular cone frame body, a cone frame fixing portion extending from the cone frame body in the direction of the magnetic bowl side wall, and a cone frame positioning portion formed in such a manner that same protrudes from the cone frame fixing portion in a direction away from the cone frame body; a magnetic bowl slot is formed in such a manner that the side of the magnetic bowl side wall that is away from the magnetic bowl body is recessed in the direction of the magnetic bowl body, and the magnetic bowl slot matches the cone frame positioning portion; and the cone frame positioning portion is inserted into the magnetic bowl slot, and a fixed connection is formed between the cone frame fixing portion and the magnetic bowl side wall. Compared with the related art, the sound production device has a simple structure and great strength, can be easily assembled and positioned, and has a high 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 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 utility model 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 purpose, 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 A bowl body and a magnetic bowl side wall that is bent and extended from the periphery of the magnetic bowl body to the direction of the diaphragm, the magnetic steel is fixed to the magnetic bowl body and is spaced from the magnetic bowl side wall to form a magnetic gap , the side wall of the magnetic bowl is fixed on the bowl frame, the voice coil is inserted into the magnetic gap, and the bowl frame includes a ring-shaped bowl frame body, which is connected to the magnetic bowl from the bowl frame body A basin frame fixing part extending in the direction of the side wall and a basin frame positioning part protruding from the basin frame fixing part in a direction away from the basin frame body; the side of the magnetic bowl side wall away from the magnetic bowl body A magnetic bowl notch is formed by recessing in the direction of the magnetic bowl body, and the magnetic bowl notch is matched with the basin frame positioning part; the basin frame positioning part is inserted into the magnetic bowl notch, and the basin frame fixing part is connected to the bowl frame. The side walls of the magnetic bowl form a fixed connection.

Preferably, the pot frame is made of metal material, and the pot frame fixing portion is fixed to the side wall of the magnetic bowl by laser welding.

Preferably, the basin frame has a rectangular structure, the basin frame fixing portion includes two basin frame fixing portions, and the two basin frame fixing portions are respectively located on opposite sides of the long axis of the basin frame.

Preferably, the basin frame positioning parts include four, and each of the four basin frame positioning parts is a set of two symmetrically distributed on opposite sides of the long axis of the basin frame.

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 connecting portion is fixed In the basin frame body, the folded ring portion is an arc-shaped structure formed by concave toward the magnetic bowl, and is disposed opposite to the basin frame fixing portion, and the folding ring portion and the basin frame fixing portion The distance is greater than the maximum vibration amplitude of the ring part.

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

Preferably, one end of the voice coil away from the magnetic circuit system is fixed to the vibration part.

Preferably, the vibration system further includes 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, and the two elastic support assemblies are respectively located in the On the opposite sides of the short axis of the basin frame, one end of the elastic support component is fixed to the basin frame body, and the other end is fixed to 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 vibration part, a first skeleton fixing part extending from the outer periphery of the skeleton body toward the elastic support component, and a a second frame fixing portion whose inner peripheral edge extends 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 part, the elastic support component is electrically connected with the voice coil.

Preferably, the second frame fixing portion includes at least two, and the adjacent second frame fixing portions are arranged at intervals to form leakage channels.

beneficial effect

Compared with the related art, the sounding device of the present invention extends the basin frame body of the basin frame out of the basin frame fixing part, and at the same time extends the basin frame fixing part out of the basin frame positioning part, The magnetic bowl side wall of the magnetic bowl is provided with the magnetic bowl notch; the basin frame positioning part is inserted into the magnetic bowl notch, and the basin frame fixing part is fixed with the magnetic bowl side wall. The structure uses the position of the magnetic bowl notch as the height positioning surface of the magnetic bowl, so that the magnetic circuit system and the basin frame are assembled and positioned accurately, and at the same time, sufficient vibration space for the vibration system is reserved. At the same time, the outer side of the side wall of the magnetic bowl is fixed with the inner side of the fixing part of the basin frame. The structure is simple, and the movement of the basin frame and the magnetic bowl is not easy to occur. The stability of the fixation of the 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 drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

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

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

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

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

FIG. 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.

BEST MODE FOR CARRYING OUT THE 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. 1-5 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 on the basin frame 1, and a vibration system 2 that drives the vibration system 2 to vibrate and emit sound. Magnetic circuit system 3.

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 body 11 , a basin frame fixing portion 12 and a basin frame positioning portion 13 .

The basin frame body 11 has an annular structure. The basin frame body 11 is used for fixing the vibration system 2 .

The basin frame fixing portion 12 is formed by extending the basin frame body 11 . The basin frame fixing portion 12 is used for fixing with the magnetic circuit system 3 by laser welding.

The basin holder positioning portion 13 is formed by protruding from the basin holder fixing portion 12 in a direction away from the basin holder body 11 . The basin frame positioning portion 13 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.

The vibration system 2 includes a 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 bowl frame body 11 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 basin frame body 11 .

The folded ring portion 212 has an arc-shaped structure formed by concave in the direction close to the magnetic bowl 31 , and is disposed opposite to the basin frame fixing portion 12 . The distance between the folded ring portion 212 and the basin frame fixing portion 12 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 basin frame body 11 , the diaphragm 21 further includes a bending part formed by the outer periphery of the connecting portion 213 along the extending direction of the basin frame body 11 . Fold and extend the annular reinforcing portion 214 . The reinforcing portion 214 is fixed to the basin frame body 11 . When the diaphragm 21 vibrates and emits sound, this structure prevents the diaphragm 21 from falling off from the basin frame body 11 , 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. In this embodiment, 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 . The elastic support assembly 23 is electrically connected to the voice coil 22 . Specifically, one end of the elastic support component 23 is fixed to the basin frame body 11 , 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 part 211 , a first frame fixing part 242 extending from the outer periphery of the frame body 241 toward the elastic support assembly 23 , and a The inner peripheral edge of the frame body 241 is a second frame fixing portion 243 extending in the direction of 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.

In this embodiment, the second frame fixing portion 243 includes at least two. Leakage channels 2430 are formed adjacent to the second frame fixing portions 243 at intervals. The structure of the leakage channel 2430 is beneficial to balance the air pressure inside and outside the voice coil 22 , so that the voice coil 22 has a good effect of driving the diaphragm 21 to vibrate and produce sound, so that the acoustic effect of the sound producing device 100 is good.

Of course, it is also possible for the voice coil 22 to directly drive the diaphragm 21 . In another embodiment, the second frame fixing portion 243 may not be provided. The specific structure is that the voice coil 22 is fixed to the vibration part 211 . One end of the voice coil 22 away from the magnetic circuit system 3 is fixed to the vibration part 211 . In this structure, the second frame fixing portion 243 is not provided, the structure is simple, and it is easy to manufacture and assemble.

The magnetic circuit system 3 includes a magnetic bowl 31 fixed to the basin frame 1 and a magnetic steel 32 accommodated in the magnetic bowl 31 .

The magnetic bowl 31 includes a magnetic bowl body 311 and a magnetic bowl side wall 312 that is bent and extended from the periphery of the magnetic bowl body 311 toward the diaphragm 21 .

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 first frame fixing portion 242 extends from the frame body 241 to the magnetic bowl body 311 .

The side wall 312 of the magnetic bowl is fixed to the basin frame 1 . The side of the magnetic bowl side wall 312 away from the magnetic bowl body 311 is recessed toward the magnetic bowl body 311 to form a magnetic bowl gap 310 . The magnetic bowl notch 310 is matched with the basin frame positioning portion 13 . The pot holder fixing portion 12 is formed by extending from the pot holder body 11 to the direction of the magnetic bowl side wall 312 .

When the sounding device 100 is assembled, the basin frame positioning portion 13 is inserted into the magnetic bowl notch 310, and the basin frame fixing portion 12 forms a fixed connection with the magnetic bowl side wall 312. This structure is used for the The magnetic circuit system 3 is assembled and positioned with the basin frame 1 . In this structure, the position of the magnetic bowl notch 310 is used as the height positioning surface of the magnetic bowl 31, so that the magnetic circuit system 3 and the basin frame 1 are assembled and positioned accurately, and at the same time, sufficient vibration is reserved. The vibration space of the system 2 , that is, the structure ensures that the distance between the folded ring portion 212 and the basin frame fixing portion 12 is greater than the maximum vibration amplitude of the folded ring portion 212 .

In this embodiment, the basin frame fixing portion 12 is fixed to the magnetic bowl side wall 312 by laser welding. Fixing by laser welding, on the one hand, the pot frame fixing part 12 and the magnetic bowl side wall 312 can be welded more firmly, and the reliability is improved; To operate with the outer side of the magnetic bowl 31, the laser oblique welding operation is simple, which is beneficial to the production and assembly of the sounding device 100, and is beneficial to mass production.

A fusion point 4 is provided on the side of the magnetic bowl side wall 312 that is close to the pot frame fixing portion 12 and/or the side of the pot frame fixing portion 12 that is adjacent to the magnetic bowl side wall 312 . The metal material of the pot frame fixing part 12 and the material of the magnetic bowl side wall 312 are fused to form the fusion point 4 by laser oblique welding, so that the laser welding can pass through the outside of the pot frame 1 and all the The operation is performed on the outer side of the magnetic bowl 31, and the laser oblique welding operation is simple, which is beneficial to the production and assembly of the sound-emitting device 100, and is beneficial to mass production. The side wall 312 of the magnetic bowl and the fixing portion 12 of the bowl frame are fixed by welding through the fusion point 4 . The fusion point 4 is located at the magnetic bowl side wall 312 close to the connection between the magnetic bowl side wall 312 and the basin frame fixing portion 12 .

In this embodiment, the fusion point 4 includes a plurality of fusion points 4 , and the plurality of fusion points 4 are symmetrically distributed on the magnetic bowl side wall 312 and the basin frame fixing portion 12 at intervals. Symmetrically distributed spot welding forms a plurality of the fusion points 4 , this structure makes the assembly process simple, and makes the pot frame fixing part 12 and the magnetic bowl side wall 312 welded more firmly, improving the sounding device 100 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 and suspended in the magnetic gap 30 . The frame fixing portion 242 extends from the frame body 241 to the magnetic gap 30 .

In this embodiment, the magnetic bowl 31 has a rectangular structure. The basin frame fixing parts 12 include two, and the two basin frame fixing parts 12 are respectively located on opposite sides of the long axis of the basin frame 1 . The symmetrically arranged basin frame fixing parts 12 make the basin frame fixing part 12 and the magnetic bowl side wall 312 welded and combined more firmly, which improves the reliability of the sounding device 100 .

More preferably, the basin frame positioning portions 13 include four, and each of the four basin frame positioning portions 13 is a set of two symmetrically distributed on opposite sides of the long axis of the basin frame 1 . The symmetrically arranged basin frame positioning portions 13 make the basin frame 1 and the magnetic bowl 31 combine more firmly, improve the reliability of the sounding device 100, and at the same time make the magnetic circuit system 3 and the 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.

Wherein, the elastic support components 23 include two, and the two elastic support components 23 are respectively located on opposite sides of the short axis of the basin frame 1, and the two elastic support components 23 symmetrically distributed are opposite to the voice coil. The support of 22 is more stable and the vibration reliability is better.

Compared with the related art, the sound-emitting device of the present invention extends the basin frame body of the basin frame out of the basin frame fixing part, and at the same time extends the basin frame fixing part from the basin frame positioning part, and the magnetic bowl side wall of the magnetic bowl is provided with the magnetic bowl notch; the basin frame positioning part is inserted into the magnetic bowl notch, and the basin frame fixing part is fixed with the magnetic bowl side wall The structure uses the position of the magnetic bowl gap as the height positioning surface of the magnetic bowl, so that the magnetic circuit system and the basin frame can be assembled and positioned accurately, and at the same time, sufficient vibration space for the vibration system is reserved. At the same time, the outer side of the side wall of the magnetic bowl is fixed with the inner side of the fixing part of the basin frame. The structure is simple, and the movement of the basin frame and the magnetic bowl is not easy to occur, which effectively ensures the connection between the basin frame and the magnetic bowl The stability of the fixation of the bowl, thereby improving the reliability of the sound-emitting device.

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 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. In the basin frame, the voice coil is inserted into the magnetic gap, and it is characterized in that:

The basin frame includes a ring-shaped basin frame body, a basin frame fixing portion extending from the basin frame body to the direction of the side wall of the magnetic bowl, and a basin frame fixing portion extending away from the basin frame body from the basin frame fixing portion. The direction protrudes to form the basin frame positioning part;

The side of the side wall of the magnetic bowl away from the magnetic bowl body is recessed toward the magnetic bowl body to form a magnetic bowl gap, and the magnetic bowl gap is matched with the basin frame positioning portion;

The basin frame positioning part is inserted into the magnetic bowl gap, and the basin frame fixing part forms a fixed connection with the side wall of the magnetic bowl at the same time.
The sound-generating device according to claim 1, wherein the basin frame is made of a metal material, and the basin frame fixing portion is fixed to the side wall of the magnetic bowl by laser welding.
The sound-generating device according to claim 1, wherein the basin frame has a rectangular structure, the basin frame fixing portion includes two basin frame fixing portions, and the two basin frame fixing portions are respectively located at the long axis of the basin frame. opposite sides.
The sound-generating device according to claim 3, wherein the basin frame positioning portion comprises four, and each two of the four basin frame positioning portions is a set of spaced symmetrically distributed on the long axis of the basin frame. opposite sides.
The sound-generating device according to claim 4, 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 connecting part is fixed on the body of the basin frame, the folding 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, so The distance between the folded ring part and the basin frame fixing part is greater than the maximum vibration amplitude of the folded ring 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 outer periphery of the connecting portion along the extending direction of the basin frame body, and the The reinforcing part is fixed on the basin frame body.
The sound-generating device according to claim 5, wherein one end of the voice coil away from the magnetic circuit system is fixed to the vibration part.
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 assemblies are respectively located on opposite sides of the short axis of the pot frame, one end of the elastic support assembly is fixed to the pot frame body, and the other end of the elastic support assembly is fixed to the frame; the voice coil passes through the frame. The frame is connected to the diaphragm.
The sound-generating device according to claim 8, wherein the frame comprises a ring-shaped frame body fixed on the vibrating part, and a first frame extending from the outer periphery of the frame body toward the elastic support assembly. A frame fixing portion and a second frame fixing portion extending from the inner periphery of the frame body toward the voice coil, the elastic support component is connected to the end of the first frame fixing portion away from the frame body, so The voice coil is connected to the second frame fixing portion.
The sound-generating device according to claim 9, wherein the second frame fixing portion comprises at least two, and the adjacent second frame fixing portions are arranged at intervals to form a leakage channel.