WO2022000782A1

WO2022000782A1 - Sound production device

Info

Publication number: WO2022000782A1
Application number: PCT/CN2020/114328
Authority: WO
Inventors: 梁平; 赵彬
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: 2020-07-02
Filing date: 2020-09-10
Publication date: 2022-01-06
Also published as: CN212812014U

Abstract

Provided is a sound production device, comprising a ring-shaped basket and a vibration system and a magnetic circuit system which are separately fixed on the basket. The vibration system comprises a diaphragm fixed on one end of the basket; the magnetic circuit system is fixed on the end of the basket away from the diaphragm and is arranged opposite to the diaphragm; the sound production device further comprises a ring-shaped seal member attached to the basket; the seal member is compressed and clamped between the basket and the magnetic circuit system to achieve seal between the basket and the magnetic circuit system. Compared with the related technology, the present sound production device has good sealing performance.

Description

sound device

technical field

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

A related art sound-generating device includes a basin frame, a vibration system and a magnetic circuit system respectively fixed to the basin frame, the vibration system including a diaphragm fixed to the basin frame, and the magnetic circuit system fixed to the basin The frame is away from the side of the diaphragm; the sealing between the basin frame and the magnetic circuit system is realized by gluing.

technical problem

However, in the related art, under the influence of the external environment, it is easy to cause the glue to dissolve or be damaged by oxidation, so that its performance becomes invalid, which in turn affects the poor sealing reliability of the glue, resulting in poor sealing performance of the sound-emitting device.

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

technical solutions

The purpose of this utility model is to provide a sounding device with good sealing performance.

In order to achieve the above purpose, the present invention provides a sound-generating device, which comprises a ring-shaped basin frame, a vibration system and a magnetic circuit system respectively fixed to the basin frame, and the vibration system includes a a diaphragm, the magnetic circuit system is fixed on the end of the basin frame away from the vibrating diaphragm and is arranged opposite to the diaphragm; the sound-emitting device further includes a ring-shaped sealing member attached to the basin frame , the sealing member is compressed and clamped between the basin frame and the magnetic circuit system to achieve sealing between the basin frame and the magnetic circuit system.

Preferably, the sealing member and the basin frame are fixed by spot welding.

Preferably, the basin frame includes a top surface and a bottom surface that are relatively spaced apart along the vibration direction of the vibrating membrane, and a side wall connecting the top surface and the bottom surface, the vibrating membrane is fixed on the top surface, so The sealing element includes an annular first wall, the first wall is attached and fixed to the bottom surface, and is compressed and clamped between the bottom surface and the magnetic circuit system.

Preferably, the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, and a first auxiliary magnetic steel fixed to the magnetic yoke and spaced from the main magnetic steel; the basin frame is far away from the main magnetic steel. One end of the diaphragm is fixed to the first auxiliary magnet, and the first wall is compressed and clamped between the first auxiliary magnet and the basin frame.

Preferably, the sealing member is made of foam material.

Preferably, the sealing member further includes a second wall bent and extended from the first wall toward the diaphragm along the vibration direction, and the second wall is attached to the side wall.

Preferably, the first wall and the second wall form a fixed seal with the basin frame by gluing or hot pressing.

Preferably, the side wall includes an inner side wall close to the magnetic circuit system and an outer side wall opposite to the inner side wall, and the second wall includes an edge bent from the first wall close to the inner side wall an extended second inner wall and a second outer wall bent and extended from the edge of the first wall close to the outer side wall, the second inner wall is attached to the inner side wall, and the second outer wall is attached to the outer side wall.

Preferably, the diaphragm includes a spherical top located in a middle position, a ring portion extending from the outer peripheral edge of the spherical top in a direction away from the spherical top, and a ring portion extending away from the spherical top from the outer peripheral edge of the ring portion. A fixing portion extending in the direction of the dome, the fixing portion is fixed on the top surface, the second inner wall extends to connect with the edge of the fixing portion close to the folded ring portion, and the second outer wall extends to connect with the edge of the fixing portion. The fixing portion is connected away from the edge of the folded ring portion, and the first wall, the second inner wall, the second outer wall and the fixing portion together wrap the basin frame.

Preferably, the sealing member is made of silicone material, and the sealing member and the diaphragm are integrally formed.

beneficial effect

Compared with the prior art, in the sound-generating device of the present invention, a ring-shaped sealing member is attached to the basin frame, and the sealing member is compressed and clamped between the basin frame and the magnetic circuit system to The sealing between the basin frame and the magnetic circuit system is realized, and the sealing reliability between the basin frame and the magnetic circuit system is effectively improved by the arrangement of the sealing element, so that the overall sealing performance of the sounding device is good.

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:

1 is a schematic three-dimensional structure diagram of Embodiment 1 of the sound-emitting device of the present invention;

2 is an exploded view of the three-dimensional structure of Embodiment 1 of the sound-emitting device of the present invention;

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

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

5 is a schematic cross-sectional view of Embodiment 2 of the sound-emitting device of the present invention;

6 is a schematic cross-sectional view of Embodiment 3 of the sound-emitting device of the present invention.

Embodiments of the present invention

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

Embodiment 1

Referring to FIGS. 1-4 , the present invention provides a sounding device 100 , which includes a basin frame 1 , a vibration system 2 , a magnetic circuit system 3 and a sealing member 4 .

The basin frame 1 is used for fixedly supporting the vibration system 2 and the magnetic circuit system 3 .

In this embodiment, the basin frame 1 is a ring-shaped steel ring structure, which includes a top surface 11 and a bottom surface 12 that are relatively spaced apart and a side wall 13 connecting the top surface 11 and the bottom surface 12 .

The vibration system 2 includes a diaphragm 21 fixed on one end of the basin frame 1 and a voice coil 22 that drives the diaphragm 21 to vibrate and emit sound. Specifically, the diaphragm 21 is fixed on the top surface 11; the The bottom surface 12 and the side wall 13 are relatively spaced apart along the vibration direction of the diaphragm 21 .

The magnetic circuit system 3 is fixed to the end of the basin frame 1 away from the diaphragm 21 and is disposed opposite to the diaphragm 21 , and has a magnetic gap 30 , and the voice coil 22 is inserted into the magnetic gap 30 Inside.

Further, the diaphragm 21 includes a spherical top 211 located in the middle position for vibrating and sounding, a ring portion 212 bent and extended from the outer periphery of the spherical top 211 in a direction away from the spherical top 211, and a ring portion 212 formed by the The outer peripheral edge of the folded ring portion 212 is a fixing portion 213 that is bent and extended in a direction away from the dome 211 , and the fixing portion 213 is fixed to the top surface 11 of the basin frame 1 .

More preferably, in order to improve the reliability of fixing and sealing between the diaphragm 21 and the basin frame 1 , in other embodiments, the side wall 13 includes an inner side wall 131 close to the magnetic circuit system 3 . and an outer side wall 132 opposite to the inner side wall 131; the fixing portion 213 includes a first fixing wall 2131 bent and extending from the folded ring portion 212, and a first fixing wall 2131 extending from the first fixing wall 2131 to the side wall The second fixing wall 2132 extending from the outer side wall 132 of The outer side wall 132 is sealed and fixed.

In this embodiment, the magnetic circuit system 3 includes a magnetic yoke 31 , a main magnetic steel 32 fixed to the magnetic yoke 31 , and fixed to the magnetic yoke 31 and disposed on opposite sides of the main magnetic steel 32 at intervals. The two first auxiliary magnetic steels 33, the two second auxiliary magnetic steels 34 fixed on the yoke 31 and arranged at intervals on the other opposite sides of the main magnetic steel 32, and the cover fixed on the first auxiliary magnetic steel The upper clamping plate 35 on the side of the magnetic steel 33 and the second auxiliary magnetic steel 34 is away from the magnetic yoke 31 .

The two first auxiliary magnetic steels 33 and the two second auxiliary magnetic steels 34 and the main magnetic steel 32 are spaced apart from each other to form the magnetic gap 30 , and the upper clamping plate 35 includes a main body portion 351 and a The inner side of the main body portion 351 protrudes and extends and covers the secondary pole cores 352 fixed on the first secondary magnetic steel 33 and the second secondary magnetic steel 34; the main body portion 351 includes two The first segment 3511 corresponding to the secondary magnetic steel 33 and the second segment 3512 corresponding to the two second secondary magnetic steels 34 are respectively provided.

The sealing member 4 is in the shape of an annular shape, which is attached to the basin frame 1 and is compressed and clamped between the basin frame 1 and the magnetic circuit system 3; The first wall 41 is affixed and fixed to the bottom surface 12 and compressed and clamped between the bottom surface 12 and the magnetic circuit system 3; Limited, it can be set according to the actual use situation, in the first embodiment, the sealing member 4 is preferably made of foam material; of course, in other embodiments, it is also feasible to select other waterproof materials for the sealing member of.

Further, one end of the basin frame 1 away from the diaphragm 21 is fixed to the first secondary magnetic steel 33 , and the first wall 41 is compressed and clamped to the first secondary magnetic steel 33 and the basin frame. between 1.

It is worth mentioning that the structural form of the first wall 41 is not limited, and it can be specifically set according to the actual situation. For example, in the first embodiment, the first wall 41 is described as a rectangle. , the first wall 41 includes two long-axis sides 411 arranged at opposite intervals and two short-axis sides 412 arranged at opposite intervals and connecting the two long-axis sides 411 respectively; the long-axis sides 411 are compressed and clamped Between the bottom surface 12 of the basin frame 1 and the first secondary magnetic steel 33 , the short-axis side 412 is spaced from the second secondary magnetic steel 34 and is compressed and clamped to the bottom surface 12 of the basin frame 1 . and the second segment 3512.

In the above structure, the sealing member 4 and the magnetic circuit system 3 are fixed by spot welding, and the sealing member 4 and the magnetic circuit system 3 form an interference fit to realize the connection between the basin frame 1 and the magnetic circuit system 3. The sealing between the magnetic circuit system 3, compared with the simple way of sealing the basin frame 1 and the magnetic circuit system 3 by gluing, the structure of the sealing member 4 is not easily affected by the temperature and humidity environment. The change avoids the problem that the sealing performance is degraded due to glue dissolution or oxidation damage, and effectively improves the sealing reliability between the basin frame 1 and the magnetic circuit system 3, so that the overall sealing performance of the sounding device 100 is good. Of course, more preferably, a small amount of glue can be added at the position where the sealing element 4 is arranged, so as to better improve the overall sealing performance.

More preferably, the vibration system 2 can also add an elastic support component 23 disposed on the side of the basin frame 1 away from the diaphragm 21 and opposite to the diaphragm 21, and the voice coil 22 is far away from the diaphragm 21. One side of the diaphragm 21 is connected to the elastic support component 23; the elastic support component 23 is used to improve the reliability of the vibration of the vibration system 2. In the first embodiment, the elastic support component 23 includes two , the two elastic support assemblies 23 are respectively fixedly connected to the two second segments 3512 of the upper splint 35 and are spaced apart from the two second secondary magnets 34 respectively, through the two elastic support assemblies 23 The setting of the double elastic support assembly forms a symmetrical structure, which makes the support effect of the voice coil 22 more stable, better prevents the lateral swing of the voice coil 22, and improves the vibration reliability of the vibration system 2. higher, thereby making the sound-emitting device 100 more reliable.

It should be noted that, in other embodiments, it is also feasible not to provide the upper splint and the second secondary magnetic steel, and it is possible to directly set four first secondary magnetic steels arranged around the main magnetic steel. At this time, the seal is compressed and clamped between the bottom surface of the basin frame and the four first pair of magnets.

Embodiment 2

Please refer to FIG. 5 , which is a schematic cross-sectional view of Embodiment 2 of the sound-emitting device of the present invention. The sound-emitting device 100a of the second embodiment is a derivative implementation of the sound-emitting device of the first embodiment. The structures of the sound-emitting devices of the two embodiments are basically the same, and the same parts will not be repeated one by one. The following mainly describes the sound of the second embodiment. The main differentiating points of device 100a are:

The sealing member 4a also includes a second wall 42a that is bent and extended from the first wall 41a to the diaphragm 21a along the vibration direction of the diaphragm 21a. The second wall 42a is attached to the side wall 13a; the second wall 42a includes two opposite walls The two second walls 42a are arranged at intervals, and the two second walls 42a are respectively attached to the inner side wall 131a and the outer side wall 132a of the side wall 13a; further, the second wall 42a and the main body 351a of the upper splint are in an interference fit to realize the gap between the two. fixed.

Further, each of the second walls 42a includes a second inner wall 421a bent and extended from the edge of the first wall 41a close to the inner side wall 131a and an edge from the first wall 41a close to the outer side wall 132a The second outer wall 422a is bent and extended, the second inner wall 421a is attached to the inner side wall 131a, and the second outer wall 422a is attached to the outer side wall 132a.

It is worth mentioning that the first wall 41a and the second wall 42a form a fixed seal with the basin frame 1a by gluing or thermoforming; the material of the sealing member 4a is not limited, it is made of rubber material.

In the above structure, the disposition of the second wall 42a effectively increases the contact area between the sealing member 4a and the basin frame 1a, and better improves the sealing performance between the two.

More preferably, the second fixed wall 2132a of the diaphragm 21a abuts against the second wall 42a located on the outer side wall 132a of the side wall 13a to form a fixed seal, so that the outer side wall 132a of the basin frame 1a is surrounded by the second wall 42a and the second wall 42a. The fixed wall 2132a is completely wrapped, which improves the sealing performance of the basin frame 1a with the diaphragm 21a and the sealing member 4a, respectively.

Embodiment 3

Please refer to FIG. 6 , which is a schematic cross-sectional view of Embodiment 3 of the sound-emitting device of the present invention. The sound-emitting device 100b of the third embodiment is a derivative implementation of the sound-emitting device of the second embodiment. The structures of the sound-emitting devices of the two embodiments are basically the same, and the same parts will not be repeated one by one. The following mainly describes the sound of the third embodiment. The main differentiating points of device 100b are:

In order to improve the sealing between the second wall 42b and the diaphragm 21b, in the third embodiment, the second inner wall 421b extends to connect with the edge of the fixing portion close to the ring portion 212b, and the second outer wall 422b extends to connect with the fixing portion 213b is connected away from the edge of the folded ring portion 212b, and the first wall 41b, the second inner wall 2131b, the second outer wall 2132b and the fixing portion 213b together wrap the basin frame 1b. This arrangement effectively improves the sealing between the sealing member 4b and the diaphragm 21b.

More preferably, the sealing member 4b is made of silicone material, and the sealing member 4b and the diaphragm 21b are integrally formed. The assembly process between the basin frame 1b, the diaphragm 21b and the sealing member 4b is omitted, and the integrated structure is more conducive to the sealing performance between the three.

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 sounding device includes a ring-shaped basin frame, a vibration system and a magnetic circuit system respectively fixed to the basin frame, the vibration system including a vibrating membrane fixed to one end of the basin frame, the magnetic circuit system It is fixed on the end of the basin frame away from the vibrating membrane and is arranged opposite to the vibrating membrane. The parts are compressed and clamped between the basin frame and the magnetic circuit system to achieve sealing between the basin frame and the magnetic circuit system.
The sound-generating device according to claim 1, wherein the sealing member and the basin frame are fixed by spot welding. .
The sound-generating device according to claim 1, wherein the basin frame comprises a top surface and a bottom surface that are relatively spaced apart along the vibration direction of the diaphragm, and a side wall connecting the top surface and the bottom surface, so The diaphragm is fixed on the top surface, and the sealing member includes a ring-shaped first wall. The first wall is attached and fixed to the bottom surface and is compressed and clamped between the bottom surface and the magnetic circuit system. between.
The sound-emitting device according to claim 3, wherein the magnetic circuit system comprises a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, and a magnetic steel fixed to the magnetic yoke and spaced from the main magnetic steel. The first secondary magnetic steel; the end of the basin frame away from the diaphragm is fixed to the first secondary magnetic steel, and the first wall is compressed and clamped between the first secondary magnetic steel and the basin frame .
The sound-generating device according to claim 3, wherein the sealing member is made of foam material.
The sound-generating device according to claim 3, wherein the sealing member further comprises a second wall that is bent and extended from the first wall toward the diaphragm along the vibration direction, and the second wall is attached to the diaphragm. on the side wall.
The sound-generating device according to claim 6, wherein the first wall and the second wall form a fixed seal with the basin frame by gluing or hot pressing.
The sound-generating device according to claim 6, wherein the side wall comprises an inner side wall adjacent to the magnetic circuit system and an outer side wall opposite to the inner side wall, and the second wall comprises a A second inner wall bent and extended from the edge of the inner side wall and a second outer wall bent and extended from the edge of the first wall near the outer side wall, the second inner wall is attached to the inner side wall , the second outer wall is attached to the outer side wall.
The sound-generating device according to claim 6, wherein the diaphragm comprises a spherical top located in a middle position, a ring portion extending from the outer peripheral edge of the spherical top in a direction away from the spherical top, and a ring portion formed by the spherical top. The outer peripheral edge of the folded ring portion is a fixing portion extending in a direction away from the dome, the fixing portion is fixed on the top surface, and the second inner wall extends to a position where the fixing portion is close to the foldable ring portion. edge connection, the second outer wall extends to connect with the edge of the fixing part away from the folded ring part, the first wall, the second inner wall, the second outer wall and the fixing part together wrap the basin shelf.
The sound-emitting device according to claim 9, wherein the sealing member is made of silicone material, and the sealing member and the diaphragm are integrally formed.