WO2021232487A1

WO2021232487A1 - Sound production device and electronic device having same

Info

Publication number: WO2021232487A1
Application number: PCT/CN2020/093729
Authority: WO
Inventors: 张古清; 毛远翔
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: 2020-05-21
Filing date: 2020-06-01
Publication date: 2021-11-25
Also published as: CN212392983U

Abstract

The present application provides a sound production device and an electronic device having same. The sound production device comprises a dome, a vibrating diaphragm, a pad edge and a waterproof ring, wherein the pad edge is of a frame structure, the dome is arranged in the pad edge, the vibrating diaphragm is arranged between the dome and the pad edge, the waterproof ring is arranged on the circumferential outer side of the pad edge, and the dome, the pad edge, the vibrating diaphragm and the waterproof ring are integrally configured via injection molding. The sound production device and the electronic device having same in the present application can solve the problem of low waterproof reliability of a sound production device in the prior art.

Description

Sound generating device and electronic equipment with the same

Technical field

This application relates to the field of sound and electricity, and in particular to a sound-producing device and electronic equipment with the same.

Background technique

With the advent of the mobile Internet era, the number of portable smart mobile devices continues to increase. Portable smart mobile devices enable users to obtain a large amount of information from anywhere through the interaction of text, images, and sound, which greatly facilitates the lives of users. As the main equipment for transmitting sound information, sound-producing devices form an important part of portable smart mobile devices.

technical problem

Among the prior art sounding devices, the sounding device includes a basin frame, a vibration system fixed to the basin frame, a magnetic circuit system that drives the vibration system to vibrate and emit sound, and a front cover that covers the basin frame. The vibration system includes a vibrator for vibrating and sounding. The diaphragm, a cushion edge used for fixing the diaphragm, and the cushion edge can be set on the basin frame and fix the diaphragm.

However, in order to achieve waterproofing, the diaphragm and the cushion edge are glued and glued in the prior art, but after the bonding surface is in contact with water for a long time, the glue on the bonding surface is likely to fail, destroying the connection between the diaphragm and the cushion edge And destroy the water resistance of the device.

Therefore, it is necessary to provide a new sound generating device and an electronic device with the same to solve the above technical problems.

Technical solutions

The purpose of this application is to provide a sounding device and an electronic device with the same, which are used to solve the problem of low waterproof reliability of the sounding device in the prior art.

The technical solution of the present application is as follows: in order to solve the above problems, the present application provides a sound emitting device, the sound emitting device includes a dome, a diaphragm, a cushion edge and a waterproof ring, the cushion edge is a frame structure, and the dome is arranged in the cushion edge. The diaphragm is arranged between the dome and the cushion edge, the waterproof ring is arranged on the circumferential outer side of the cushion edge, and the dome, the cushion edge, the diaphragm and the waterproof ring are integrally formed by injection molding.

Further, the diaphragm includes a diaphragm body, a bending portion, and a connecting portion. The dome has a first surface and a second surface opposite to each other. The diaphragm body covers the first surface of the dome, and the connecting portion is connected with the cushion edge. The part is arranged between the diaphragm body and the connecting part.

Further, the vibrating membrane further includes a lip portion, the lip portion is arranged on the bending portion and is attached to the second surface of the dome.

Further, the lip is attached to the second surface of the dome along the edge of the dome.

Further, the side of the cushion edge facing the connecting portion is provided with a first step surface, and the connecting portion is provided with a second step surface adapted to the first step surface.

Further, the first step surface is gradually protruded and then gradually recessed from the first surface of the dome to the second surface of the dome.

Further, the side of the cushion edge facing the waterproof ring is provided with a third stepped surface, and the waterproof ring is provided with a fourth stepped surface adapted to the third stepped surface.

Further, the material of the diaphragm and/or the waterproof ring is silica gel.

Further, the side of the cushion edge facing the diaphragm has a rough surface or a porous structure, and/or the side of the cushion edge facing the waterproof ring has a rough surface or a porous structure.

On the other hand, this application also provides an electronic device, including a housing and a sounding device, the sounding device can be arranged in the housing, the sounding device is a sounding device containing all or part of the above technical structure, and the waterproof ring of the sounding device is located at A sealing structure is formed between the cushion edge of the sounding device and the shell.

Beneficial effect

The beneficial effects of the present application are that the dome, the cushion, the diaphragm and the waterproof ring are integrally formed. Firstly, it avoids the failure of the glue caused by the liquid infiltration of the contacting surface in the traditional connection method, and the resulting dome and pad The problem of separation between the edge and the diaphragm. Second, the integrated connection method reduces the connection gaps between the dome, cushion, diaphragm and waterproof ring caused by the traditional connection method, thereby effectively avoiding the penetration of liquid through the connection gaps between the components. To the inside of the generating device, the conductive parts in the sound generating device are effectively protected. Third, when the sound emitting device is placed in the shell, the waterproof ring can fill the gap between the cushion edge and the shell, and play a waterproof and sealing effect, preventing liquid from entering the shell and entering the sound emitting device from other directions. .

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic diagram of the three-dimensional structure of the sound generating device of this application;

FIG. 2 is a schematic top view of the structure of the sound emitting device of FIG. 1;

Fig. 3 is a schematic diagram of the A-A cross-sectional structure of the sound emitting device of Fig. 2; and

FIG. 4 is a schematic diagram of a partial enlarged structure at B of the sound emitting device of FIG. 3.

The above drawings contain the following reference signs:

10. Dome; 20. Diaphragm; 21. Diaphragm body; 22. Bending part; 23. Connecting part; 24. Lip; 25. Second step surface; 30. Edge cushion; 31. First step surface 32, the third step surface; 40, the waterproof ring; 41, the fourth step surface; 60, the voice coil; 71, the main pole core; 72, the secondary pole core; 81, the main magnet; 82, the auxiliary magnet; 90 , Basin frame.

Embodiments of the present invention

In order to facilitate the understanding of the application, the application will be described in a more comprehensive manner with reference to the relevant drawings. The preferred embodiments of the application are shown in the accompanying drawings. However, this application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of this application more thorough and comprehensive.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or a central element may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terms used in the specification of the application herein are only for the purpose of describing specific embodiments, and are not intended to limit the application. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

As shown in Figures 1 to 4, the sounding device of this embodiment includes a dome 10, a diaphragm 20, a cushion 30, a waterproof ring 40, and a basin frame 90. The basin frame 90 is a box-like structure with an opening and has a housing Cavity, the containing cavity is used to place magnets, pole cores and other structures. Specifically, as shown in FIG. 3, the magnetic steel includes a main magnetic steel 81 and a sub-magnet 82, and the sub-magnet 82 is arranged to surround the main magnet 81 and spaced from the main magnet 81 by a certain distance to form a magnetic gap. The pole core includes a main pole core 71 and a secondary pole core 72. The main pole core 71 is stacked on the main magnetic steel 81, the secondary pole core 72 is stacked on the secondary magnetic steel 82, and the voice coil 60 is arranged in the magnetic gap.

The cushion 30 has a frame structure and can be arranged on the side wall of the basin frame 90. The dome 10 is set at the center of the cushion 30. The diaphragm 20 is connected between the dome 10 and the cushion 30. The dome 10, vibration The membrane 20 and the cushion 30 can close the opening of the basin frame 90. The waterproof ring 40 is arranged on the circumferential outer side of the cushion edge 30. When the sound emitting device is placed in the housing, the waterproof ring 40 is located between the cushion edge 30 and the housing and forms a sealing structure. Specifically, the dome 10, the cushion edge 30, the diaphragm 20 and the waterproof ring 40 of this embodiment are integrally formed.

Applying the technical solution of this embodiment, the dome 10, the cushion edge 30, the diaphragm 20 and the waterproof ring 40 are integrally formed. First, it avoids that the liquid in the traditional connection method penetrates into the mutually contacting surfaces and causes the glue to fail. The dome 10, the cushion edge 30 and the diaphragm 20 are separated. Second, the integral connection method reduces the connection gaps between the dome 10, the cushion 30, the diaphragm 20 and the waterproof ring 40 caused by the traditional connection method, thereby effectively preventing the liquid from penetrating between the components. The connecting gaps penetrate into the sound-producing device, thereby effectively protecting the conductive parts in the sound-producing device. Third, when the sound emitting device is placed in the shell, the waterproof ring 40 can fill the gap between the cushion edge 30 and the shell, and play a waterproof and sealing effect, preventing liquid from entering the shell and entering the sound from other directions. In the device.

The dome 10 has opposite first and second surfaces. The dome 10 and the diaphragm 20 can vibrate and emit sound. As shown in FIGS. 3 and 4, the diaphragm 20 of this embodiment includes a diaphragm body 21, a curved The folding portion 22 and the connecting portion 23, the diaphragm body 21 covers the first surface of the dome 10, the connecting portion 23 is connected with the cushion 30, and the bending portion 22 is arranged between the diaphragm body 21 and the connecting portion 23. When the dome 10 and the diaphragm body 21 are driven by an external force to leave the original position, the bending portion 22 can deform and provide a force to return to the original position, thereby realizing the vibration and sound of the dome 10 and the diaphragm body 21 .

Furthermore, as shown in FIGS. 3 and 4, the diaphragm 20 of this embodiment further includes a lip 24, which is disposed on the bending part 22 and is attached to the second surface of the dome 10. The lip 24 protrudes from the edge of the dome 10 to the center of the dome 10 for a certain distance, and the lip 24 is attached to the second surface of the dome 10. The lip 24 and the diaphragm body 21 are respectively attached to the two opposite surfaces of the dome 10, which will not affect the vibration of the dome 10 under external force driving, and can also improve the stability of the combination of the dome 10 and the diaphragm body 21.

Preferably, in this embodiment, the dome 10 and the cushion edge 30 can be placed in a preset mold, and then liquid silicone material is injected into the mold to fill the space between the dome 10, cushion edge 30 and the mold. It is shaped into the diaphragm 20, and the space between the cushion edge 30 and the mold is shaped into a waterproof ring 40, so that the dome 10, the cushion edge 30, the diaphragm 20 and the waterproof ring 40 are integrally formed.

Compared with conventional composite membranes, the diaphragm 20 made of silica gel is thicker, has higher stability, and has better resilience, and is less likely to be deformed after being in contact with water, which can effectively improve the waterproof reliability of the sound generating device.

In order to improve the connection reliability between the cushion edge 30 and the diaphragm 20, as shown in FIGS. 3 and 4, the cushion edge 30 of the present embodiment is provided with a first step surface 31 on the side facing the connecting portion 23, corresponding to it Ground, the connecting portion 23 is provided with a second step surface 25 that is adapted to the first step surface 31. The first step surface 31 and the second step surface 25 form a concave-convex matching structure between the connecting portion 23 and the cushion edge 30, increase the area of the joint surface between the connecting portion 23 and the cushion edge 30, improve the bonding strength of the two, and strengthen Waterproof reliability.

Further, the first step surface 31 of the present embodiment gradually protrudes from the first surface of the dome 10 to the second surface of the dome 10, and then is gradually recessed. As shown in FIGS. 3 and 4, the first step surface 31 is composed of four stepped surfaces. In the direction from top to bottom in the figure (that is, the direction in which the first surface of the dome 10 faces the second surface of the dome 10), the second step surface protrudes from the first step surface and The third stepped surface, the third stepped surface protrudes from the fourth stepped surface, so that the first stepped surface 31 as a whole forms a shape in which the middle part protrudes from both sides, and the second stepped surface 25 on the connecting portion 23 and the first stepped surface The surface 31 fits. The above structure can make the connecting portion 23 appear as a wrapper 30 as a whole, which avoids the possibility of a single change trend that is obviously separated to one side when the overall change trend of the step surface gradually protrudes or is gradually recessed.

Similar to the first step surface 31 and the second step surface 25, in order to improve the reliability of the connection between the cushion edge 30 and the waterproof ring 40, as shown in FIGS. 3 and 4, the cushion edge 30 faces the side of the waterproof ring 40 A third step surface 32 is provided. Correspondingly, a fourth step surface 41 adapted to the third step surface 32 is provided on the waterproof ring 40. The third step surface 32 and the fourth step surface 41 form a concave-convex matching structure between the waterproof ring 40 and the cushion edge 30, increase the area of the joint surface between the waterproof ring 40 and the cushion edge 30, improve the bonding strength of the two, and strengthen Waterproof reliability.

In order to make the connection relationship between the waterproof ring 40 and the bedding 30 reliable and stable, the bedding 30 of this embodiment has been roughened toward the surface of the waterproof ring 40 to increase the contact between the bedding 30 and the waterproof ring 40 The area improves the reliability of the connection relationship between the waterproof ring 40 and the cushion edge 30. In the same way, in order to make the connection relationship between the diaphragm 20 and the cushion edge 30 reliable and stable, the cushion edge 30 of this embodiment has been roughened toward the surface of the diaphragm 20 to increase the difference between the cushion edge 30 and the diaphragm 20. The contact area between the two improves the reliability of the connection relationship between the diaphragm 20 and the edge pad 30.

In other embodiments not shown in the figure, a porous structure layer may also be provided on the side of the cushion edge 30 facing the waterproof ring 40, and a porous structure layer may be disposed on the side of the cushion edge 30 facing the diaphragm 20. During injection molding, the silica gel The liquid can penetrate into the porous structure layer, and after curing, the cured silica gel is interwoven with the porous structure, which can also enhance the reliability of the connection.

The present application also provides an electronic device. The electronic device (not shown in the figure) according to this embodiment includes a housing and a sounding device, and the sounding device is arranged in the housing. Specifically, the sound emitting device is a sound emitting device that includes all or part of the above technical features. The electronic equipment of this embodiment has the advantages of high waterproof reliability of the sound generating device and not easy to fail due to water ingress.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these all belong to this application. The scope of protection.

Claims

A sounding device, characterized in that the sounding device includes a dome, a diaphragm, a cushion edge and a waterproof ring, the cushion edge is a frame structure, the dome is arranged in the cushion edge, and the diaphragm It is arranged between the dome and the cushion, the waterproof ring is arranged on the circumferential outer side of the cushion, and the dome, the cushion, the diaphragm and the waterproof ring are integrally injected Set in molding.
The sounding device according to claim 1, wherein the diaphragm comprises a diaphragm body, a bending portion and a connecting portion, the dome has a first surface and a second surface opposite to each other, and the diaphragm body Covering the first surface of the dome, the connecting portion is connected with the cushion edge, and the bending portion is arranged between the diaphragm body and the connecting portion.
3. The sound emitting device according to claim 2, wherein the diaphragm further comprises a lip, and the lip is arranged on the bent portion and is attached to the second surface of the dome.
The sound emitting device according to claim 3, wherein the lip is attached to the second surface of the dome along the edge of the dome.
The sounding device according to claim 2, wherein the side of the cushion edge facing the connecting portion is provided with a first stepped surface, and the connecting portion is provided with a first stepped surface adapted to the first stepped surface. The second step surface.
5. The sounding device according to claim 5, wherein the first step surface is gradually protruded and then gradually recessed from the first surface of the dome to the second surface of the dome.
The sounding device according to claim 1, wherein the side of the cushion edge facing the waterproof ring is provided with a third step surface, and the waterproof ring is provided with a third step surface that is adapted to the third step surface. The fourth step surface.
The sound emitting device according to claim 1, wherein the material of the diaphragm and/or the waterproof ring is silica gel.
The sounding device according to claim 1, wherein the side of the cushion edge facing the diaphragm has a rough surface or a porous structure, and/or the side of the cushion edge facing the waterproof ring has a rough surface or a porous structure. Rough surface or porous structure.
An electronic device, comprising a housing and a sounding device, the sounding device can be arranged in the housing, characterized in that the sounding device is the sounding device of any one of claims 1 to 9, so The waterproof ring of the sound emitting device is located between the cushion edge of the sound emitting device and the housing and forms a sealing structure.