WO2022000778A1

WO2022000778A1 - Sound production device

Info

Publication number: WO2022000778A1
Application number: PCT/CN2020/114320
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: 2020-06-30
Filing date: 2020-09-10
Publication date: 2022-01-06
Also published as: CN212811995U

Abstract

Disclosed is a sound production device. The sound production device comprises a frame and a vibrating diaphragm fixed on the frame. The vibrating diaphragm comprises a dome and a folding ring arranged around the dome. The folding ring comprises a connecting part connected to the dome, a folding ring part, which is bent and extends outwards from the periphery of the connecting part, and a fixing part, which extends towards the frame from the folding ring part. The fixing part comprises a top wall extending from the folding ring part, and an outer peripheral wall extending from a side of the top wall that is away from the folding ring part along the outer peripheral side of the frame; and the fixing part further comprises an inner peripheral wall extending from the top wall along the inner peripheral side of the frame, the inner peripheral wall and the outer peripheral wall being arranged in a spaced manner. A fixing slot is jointly defined by the top wall, the inner peripheral wall and the outer peripheral wall, at least part of the frame is inserted into the fixing slot and abuts against and is fixed to the top wall, the periphery of the portion of the frame inserted into the fixing slot is bonded and fixed to the outer peripheral wall, and the inner periphery of the portion of the frame inserted into the fixing slot is bonded and fixed to the inner peripheral wall. Compared with the prior art, the sound production device of the present application has good 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 and a vibrating membrane fixed on the basin frame; the vibrating membrane includes a connecting portion, a folded ring portion extending outward from the periphery of the connecting portion, and a ring portion formed by the folded ring portion. A fixing portion extending in the direction of the basin frame, and the fixing portion is glued and fixed to the basin frame. For good gluing effect, the fixing parts are respectively glued and fixed to one end of the basin frame and the outer side surface connected to the end.

technical problem

However, in the sound-generating device in the related art, in order to have a larger internal space in the miniaturized sound-generating device, so as to realize larger internal components and magnetic circuits, the basin frame is usually made of a steel ring. The side width of the structure using the steel ring is narrower than that of the traditional basin frame, and the width limit of the steel ring is generally about 0.1 to 0.3 mm. Therefore, the use of the structural synchronization of the steel ring brings the risk that the diaphragm and the steel ring are not firmly glued. The results of the reliability experiments show that the steel ring and the front face of the diaphragm are easy to open and separate, resulting in the collision of the diaphragm and the steel ring to generate noise, thereby causing the failure of the sounding device.

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

technical solutions

The purpose of the utility model is to provide a sound-emitting device with good reliability.

In order to achieve the above purpose, the present invention provides a sound-generating device, which includes a basin frame and a diaphragm fixed on the basin frame, the diaphragm includes a spherical top and a fold ring arranged around the spherical top, the The folded ring includes a connection part connected with the dome, a folded ring part bent and extended outward from the peripheral edge of the connection part, and a fixed part extended from the folded ring part to the direction of the basin frame. The portion includes a top wall extending from the folded ring portion, an outer peripheral wall extending along an outer peripheral side of the basin frame from a side of the top wall away from the folded ring portion, and an outer peripheral wall extending from the top wall along the basin frame The inner peripheral wall extending from the inner peripheral side of the inner peripheral wall, the inner peripheral wall and the outer peripheral wall are arranged at intervals, the top wall, the inner peripheral wall and the outer peripheral wall together form a fixing groove, and the basin frame is at least partially inserted into the The fixing groove is abutted and fixed on the top wall, the basin frame is inserted into the outer periphery of the fixing groove portion and is bonded and fixed to the outer peripheral wall, and the basin frame is inserted into the inner periphery of the fixing groove portion and the inner periphery of the fixing groove. The peripheral wall is glued and fixed.

Preferably, the inner peripheral wall is a rectangular structure with rounded corners, the inner peripheral wall includes four rounded corner portions and four straight edge portions respectively connected with two adjacent rounded corner portions, the rounded corners The thickness of the portion is greater than the thickness of the straight edge portion.

Preferably, the thickness of the straight edge portion gradually decreases from the portion connected with the top wall to the direction away from the top wall.

Preferably, the top wall is arranged perpendicular to the inner peripheral wall and the outer peripheral wall, respectively.

Preferably, the pot frame is bonded and fixed with the inner peripheral wall and the outer peripheral wall by injecting glue at the same time.

Preferably, the diaphragm is made of polymer material.

Preferably, the diaphragm is made of silica gel or rubber.

Preferably, the thickness of the basin frame ranges from 0.1 mm to 0.3 mm.

Preferably, the basin frame is made of an annular steel ring.

Preferably, the connecting portion is provided with a through hole therethrough, and the dome is attached and fixed to the connecting portion and covers the through hole.

beneficial effect

Compared with the related art, the sound-emitting device of the present invention will set the fixed part of the diaphragm with a fixed groove, and the fixed groove is jointly surrounded by the top wall, the inner peripheral wall and the outer peripheral wall of the fixed part, and at least partially insert the basin frame. The fixing groove is abutted on the top wall, and the outer periphery of the fixing groove part is inserted into the basin frame and fixed to the outer peripheral wall, and the inner periphery of the basin frame is inserted into the fixing groove part to be glued and fixed to the inner peripheral wall. This structure effectively increases the adhesive contact surface between the diaphragm and the basin frame, improves the bonding strength, thereby reducing the risk of separation and opening of the adhesive surface of the diaphragm and the basin frame; in addition, from the perspective of mold structure design, this structure can reduce the size of the basin in the integral molding. Risk of glue spilling on the inside of the rack. To sum up the above, the sound-emitting device of the present invention has good reliability.

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 C in Fig. 3;

Fig. 5 is a sectional view along line B-B in Fig. 1;

Fig. 6 is the enlarged view of the part shown in D in Fig. 5;

7 is a schematic three-dimensional structure diagram of the vibrating membrane of the sound-emitting device of the present invention;

8 is a schematic diagram of the three-dimensional assembly structure of the vibrating membrane and the basin frame 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.

Please refer to FIGS. 1-8 at the same time, the present invention provides a sound-emitting device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 respectively supported on the basin frame 1, and the magnetic circuit system 3 drives the The vibration system 2 vibrates and emits sound.

In this embodiment, the thickness of the basin frame 1 ranges from 0.1 mm to 0.3 mm. The side width of the steel ring structure using this thickness range is narrower than that of the traditional basin frame structure, which is more beneficial to make the internal space of the sound generating device 100 larger.

More preferably, the basin frame 1 is made of an annular steel ring. It is beneficial for the internal space in the sound generating device 100 to be larger, so as to realize larger internal components and magnetic circuits.

The vibration system 2 is fixed to the basin frame 1 . Specifically, the vibration system 2 includes a diaphragm 4 fixed to the basin frame 1 and a voice coil 5 that drives the diaphragm 4 to vibrate and produce sound.

The diaphragm 4 includes a dome 6 and a ring 7 arranged around the dome 6 .

The folded ring 7 includes a connection portion 71 connected to the dome 6 , a folded ring portion 72 bent and extended outward from the peripheral edge of the connection portion 71 , and a folded ring portion 72 to the basin frame 1 . The fixed portion 73 extending in the direction.

The connecting portion 71 is provided with a through hole 710 therethrough, and the dome 6 is attached and fixed to the connecting portion 71 and covers the through hole 710 . The spherical top 6 is beneficial to increase the rigidity of the connecting portion 71 .

The fixing portion 73 includes a top wall 731 extending from the ring portion 72 , an outer peripheral wall 732 extending along the outer peripheral side of the basin frame 1 from the side of the top wall 731 away from the ring portion 72 , and An inner peripheral wall 733 extending from the top wall 731 along the inner peripheral side of the basin frame 1 .

The top wall 731 is fixed to one end of the basin frame 1 . Specifically, the top wall 731 is fixed to the end of the basin frame 1 away from the magnetic circuit system 3 . The outer peripheral wall 732 is glued and fixed to the outside of the basin frame 1 . The inner peripheral wall 733 is glued and fixed to the inner side of the basin frame 1 .

Specifically, the inner peripheral wall 733 is spaced apart from the outer peripheral wall 732 . The top wall 731 , the inner peripheral wall 733 and the outer peripheral wall 732 together define a fixing groove 730 . The basin frame 1 is at least partially inserted into the fixing groove 730 and abutted and fixed on the top wall 731 . The outer periphery of the portion of the pot holder 1 inserted into the fixing groove 730 is bonded and fixed to the outer peripheral wall 732 , and the inner periphery of the portion of the pot holder 1 inserted into the fixing groove 730 is bonded and fixed to the inner peripheral wall 733 . That is to say, the opposite sides of the portion of the basin frame 1 inserted into the fixing groove 730 are glued and fixed to the inner peripheral wall 733 and the outer peripheral wall 732 respectively. This structure effectively increases the gluing contact surface between the diaphragm 4 and the pot frame 1, improves the gluing strength, thereby reducing the risk of separation and opening of the diaphragm 4 and the gluing surface of the pot frame 1; in addition, from the perspective of mold structure design In other words, this structure can reduce the risk of glue spilling on the inner side of the basin frame 1 during the integral molding, so that the reliability of the sound-emitting device 100 is good.

In this embodiment, the basin frame 1 is bonded and fixed to the inner peripheral wall 733 and the outer peripheral wall 732 by injecting glue at the same time. This process makes the assembly of the sound-emitting device 100 simpler, so that the reliability of the sound-emitting device 100 is good.

In this embodiment, the inner peripheral wall 733 is a rectangular structure with rounded corners. Specifically, the inner peripheral wall 733 includes four rounded corner portions 7331 and four straight edge portions 7332 respectively connected with two adjacent rounded corner portions 7331 . The thickness of the rounded portion 7331 is greater than the thickness of the straight edge portion 7332 . The overall thickened structure of the rounded portion 7331 can increase the stiffness of the diaphragm 4, thereby increasing the stiffness of the sound-generating device 100 and improving the performance of the sound-generating device 100; and simultaneously reducing the vibration At the position of the rounded corners 7331 , the membrane 4 has a risk of membrane rupture, thereby improving the reliability of the sound-emitting device 100 .

In order to increase the internal volume of the sound-emitting device 100 , the components and magnetic circuits inside the sound-emitting device 100 are made larger. In this embodiment, the thickness of the straight edge portion 7332 gradually decreases from the portion connecting with the top wall 731 to the direction away from the top wall 731 . In this embodiment, the straight edge portion 7332 is designed in an inverted right triangle shape.

In order to simplify the processing and assembly of the sound-emitting device 100, and improve reliability. In this embodiment, the top wall 731 is arranged perpendicular to the inner peripheral wall 733 and the outer peripheral wall 732 respectively. This structure makes the inner peripheral wall 733 and the outer peripheral wall 732 parallel to each other, so that the basin frame 1 can be easily inserted into the fixing groove 730, and it is convenient for the subsequent adjustment of the inner peripheral wall 733 and the outer peripheral wall 732. And, the opposite sides of the portion of the basin frame 1 inserted into the fixing groove 730 are glued and fixed.

In this embodiment, the diaphragm 4 is made of a polymer material. Specifically, the diaphragm 4 is made of silicone or rubber. The use of this material for the diaphragm 4 not only ensures the acoustic performance, but also facilitates processing and assembly.

The magnetic circuit system 3 includes a magnetic yoke 31 fixed to the basin frame 1 and disposed on the opposite side of the upper diaphragm 4 , and a main magnetic steel 32 and a secondary magnetic steel 33 respectively fixed to the magnetic yoke 31 . The secondary magnetic steel 33 is disposed on opposite sides of the main magnetic steel 32 and is spaced from the main magnetic steel 32 to form the magnetic gap 30 .

The voice coil 5 is inserted into the magnetic gap 30 , and the magnetic circuit system 3 drives the voice coil 5 through the magnetic gap 30 to drive the diaphragm 4 to vibrate and produce sound.

In this embodiment, the magnetic circuit system 3 further includes a ring-shaped clamping plate 34 stacked on the secondary magnetic steel 33 . The clamping plate 34 is supported and fixed to the yoke 31 . One end of the basin frame 1 away from the diaphragm 4 is fixed to the splint 34 . This structure enables the magnetic circuit system 3 to be fixed to the basin frame 1 .

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 comprising a basin frame and a vibrating membrane fixed to the basin frame, the vibrating membrane comprising a dome and a fold ring arranged around the sphere, the fold ring comprising a A connection part, a folded ring part bent and extended outward from the peripheral edge of the connection part, and a fixing part extended from the folded ring part to the direction of the basin frame, the fixing part includes a folded ring part extending from the A top wall and an outer peripheral wall extending from the side of the top wall away from the folded ring portion along the outer peripheral side of the basin frame, characterized in that, the fixing portion further comprises a side extending from the top wall along the basin frame The inner peripheral wall extending from the inner peripheral side of the inner peripheral wall, the inner peripheral wall and the outer peripheral wall are spaced apart, the top wall, the inner peripheral wall and the outer peripheral wall together form a fixing groove, and the basin frame is at least partially inserted into the The fixing groove is abutted and fixed on the top wall, the basin frame is inserted into the outer periphery of the fixing groove portion and is bonded and fixed to the outer peripheral wall, and the basin frame is inserted into the inner periphery of the fixing groove portion and the inner periphery of the fixing groove. The peripheral wall is glued and fixed.
The sound-emitting device according to claim 1, wherein the inner peripheral wall is a rectangular structure with rounded corners, and the inner peripheral wall comprises four rounded corners and is respectively connected with two adjacent rounded corners The thickness of the rounded corners is greater than the thickness of the straight edges.
The sound-emitting device according to claim 2, wherein the thickness of the straight edge portion gradually decreases from the portion connected with the top wall to a direction away from the top wall.
The sound-generating device according to claim 1, wherein the top wall is perpendicular to the inner peripheral wall and the outer peripheral wall, respectively.
The sound-generating device according to claim 1, wherein the basin frame is bonded and fixed with the inner peripheral wall and the outer peripheral wall by injecting glue.
The sound-generating device according to claim 1, wherein the diaphragm is made of a polymer material.
The sound-generating device according to claim 6, wherein the diaphragm is made of silicone or rubber.
The sound-generating device according to claim 1, wherein the thickness of the basin frame ranges from 0.1 mm to 0.3 mm.
The sounding device according to claim 8, wherein the basin frame is made of a rectangular steel ring.
The sound-emitting device according to claim 1, wherein the connecting portion is provided with a through hole penetrating therethrough, and the dome is attached and fixed to the connecting portion and covers the through hole.