WO2020113738A1

WO2020113738A1 - Sound-emitting device and processing method used for diaphragm assembly of sound-emitting device

Info

Publication number: WO2020113738A1
Application number: PCT/CN2018/125544
Authority: WO
Inventors: 郭晓冬; 孙雅静
Original assignee: 歌尔股份有限公司
Priority date: 2018-12-07
Filing date: 2018-12-29
Publication date: 2020-06-11
Also published as: CN109511079A

Abstract

Disclosed by the present invention are a sound-emitting device and a processing method used for a diaphragm assembly of a sound-emitting device, wherein the sound-emitting device comprises: a casing; a metal ring, which is fixed at an end of the casing and which comprises a circular main body and a raised edge, the circular main body extending along the circumference of the casing, and the raised edge being connected to the circular main body and extending along the periphery of the circuit main body; and a diaphragm, which comprises a central part, a folding ring part that is disposed surrounding the central part and an edge part that is disposed surrounding the folding ring part; the edge part comprises a first fixed part and a second fixed part, the first fixed part being disposed surrounding the folding ring part and being fixed on a surface of the circular main body that deviates from the casing, and the second fixed part being connected to the periphery of the first fixed part and being fixed at a side surface of the raised edge. The technical solution of the present invention avoids the influence on the vibration of a diaphragm while guaranteeing the stable adhesion of the diaphragm and a metal ring.

Description

Sounding device and processing method of diaphragm assembly for sounding device

Technical field

The invention relates to the technical field of sound energy conversion, in particular to a sound generating device and a processing method of a diaphragm assembly used for the sound generating device.

Background technique

In the sound-generating device, since the diaphragm is soft and easily deformed, in order to facilitate the installation of the diaphragm, a steel ring is usually added, the diaphragm is first bonded to the steel ring, so that the periphery of the diaphragm is fixed, and then the The steel ring is fixed with the shell. Generally, the bonding area between the steel ring and the diaphragm needs to be large to ensure a stable bonding between the diaphragm and the steel ring, but an excessively large bonding area means that the width of the steel ring needs to be large, and The outer diameter of the steel ring is usually fixed according to the overall shape of the sounding device, so it is only possible to increase the bonding area of the steel ring by reducing the inner diameter of the steel ring, which causes the inner surface of the steel ring to be closer to the vibration The folded part of the membrane causes the effective vibration area of the diaphragm to decrease, which in turn affects the sound effect.

Summary of the invention

The main purpose of the present invention is to propose a sound-generating device, which aims to ensure the stable adhesion of the diaphragm and the metal ring while avoiding the impact on the vibration of the diaphragm.

In order to achieve the above object, the sound generating device proposed by the present invention includes:

shell;

A metal ring is fixed to one end of the casing, the metal ring includes a ring-shaped body and a convex edge, the ring-shaped body extends along the circumferential direction of the shell, the convex edge is connected to the ring-shaped body, and Extending along the circumference of the annular body; and

The diaphragm includes a central portion, a folded ring portion disposed around the central portion, and an edge portion disposed around the folded ring portion, the edge portion includes a first fixing portion and a second fixing portion, the first fixing portion It is arranged around the folded ring portion and fixed to the surface of the ring-shaped body facing away from the housing, the second fixing portion is connected to the outer edge of the first fixing portion, and is fixed to the side of the convex edge .

Optionally, the protrusion is protrudingly provided toward the housing, and the second fixing portion is fixed to the outer side of the protrusion.

Optionally, a gap is provided between the surface of the housing facing the diaphragm and the outer peripheral surface, and the convex edge extends into the gap.

Optionally, the protrusion is protrudingly provided in a direction away from the housing, and the second fixing portion is fixed to the inner side of the protrusion.

Optionally, the ring-shaped body is provided with two convex edges, and the two convex edges are provided on two opposite sides of the ring-shaped body; the edge portion includes two of the second fixing portions and two The second fixing portion is provided on two opposite sides of the first fixing portion.

Optionally, the inner side of the convex edge is flush with the inner circumferential surface of the ring-shaped body, and/or the outer side of the convex edge is flush with the outer circumferential surface of the ring-shaped body.

Optionally, both the convex edge and the second fixing portion are ring-shaped.

Optionally, the first fixing portion and the second fixing portion are respectively bonded to the metal ring.

Optionally, the width of the annular body is greater than or equal to 0.2 mm; and/or, the height of the convex edge is greater than or equal to 0.15 mm.

The present invention also proposes a processing method for a diaphragm assembly of a sound-emitting device. The processing method includes:

Bend the edges of the ring-shaped metal sheet integrally to form a convex edge;

The diaphragm is fixed to the metal sheet, an edge portion of the diaphragm is bent and extended along the side of the convex edge to form a second fixing portion, and the second fixing portion is fixed to the convex edge side;

Among them, the bent metal sheet forms a metal ring;

Alternatively, the processing method includes:

Fix the diaphragm and the ring-shaped metal sheet to form the diaphragm assembly;

Bending the edge of the diaphragm assembly to form a bent portion;

Wherein, the diaphragm on the bent portion constitutes a second fixing portion, the metal sheet on the bent portion constitutes a convex edge, and the bent metal sheet constitutes a metal ring.

In the present invention, because the convex edge is additionally added, the second fixing portion of the diaphragm can be fixed to the side surface of the convex edge, and the fixing surface on the metal ring for fixing the diaphragm changes from the end surface of the original annular body to a convex The side surface and the end surface of the ring-shaped body provide a part of the fixing surface for the fixing of the diaphragm, so that the width of the ring-shaped body can be reduced while ensuring the reliable fixing of the diaphragm and the metal ring, that is, The inner circumferential size of the ring-shaped body can be increased, so that the inner circumferential surface of the ring-shaped body is arranged more outward than the folded ring portion, so that the effective vibration area of the diaphragm can be increased, so that the sound effect of the sound generating device is improved. Alternatively, the height of the convex edge can be increased to make the fixing surface between the convex edge and the diaphragm larger, thereby improving the connection stability between the diaphragm and the metal ring. Furthermore, the provision of the convex edge can play a role in strengthening the structural strength of the metal ring.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained according to the structures shown in these drawings.

FIG. 1 is a schematic structural diagram of an embodiment of a sound-generating device of the present invention;

2 is a schematic plan view of the sounding device in FIG. 1;

3 is a schematic cross-sectional view at A-A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 3;

5 is a schematic diagram of the assembly of the diaphragm and the metal ring in FIG. 1;

6 is a schematic diagram of the structure of the diaphragm in FIG. 5;

7 is a schematic diagram of the structure of the metal ring in FIG. 5;

8 is a schematic structural view of the housing in FIG. 1;

9 is a schematic cross-sectional view of another embodiment of the sound emitting device of the present invention;

FIG. 10 is an enlarged view at C in FIG. 9;

11 is a schematic diagram of the assembly of the diaphragm and the metal ring in FIG. 9;

12 is a schematic flowchart of an embodiment of a method for processing a diaphragm assembly of the present invention;

13 is a schematic flowchart of another embodiment of a processing method of a diaphragm assembly of the present invention.

Description of drawings

标号Label	名称 name	标号Label		名称name
1010	外壳shell	22twenty two	折环部 Fold ring
1111	让位缺口Yield gap	23twenty three	中心部 Center
2020	振膜 Diaphragm	3030	金属环metal ring

21twenty one	边缘部Fringe	3131	环状本体 Ring body
211211	第一固定部First fixed part	3232	凸沿Convex edge
212212	第二固定部Second fixed part	A	A

The implementation, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings.

detailed description

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

It should be noted that if there is a directional indicator (such as up, down, left, right, front, back, etc.) in the embodiment of the present invention, the directional indicator is only used to explain a specific posture (as shown in the drawings) The relative positional relationship, movements, etc. of the components below, if the specific posture changes, then the directional indication changes accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are for descriptive purposes only, and cannot be understood as instructions or hints Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined with "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the meaning of “and/or” appearing throughout the text is to include three parallel plans, taking “A and/or B as an example”, including plan A, or plan B, or plans that both A and B satisfy. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to realize. When the combination of technical solutions contradicts or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the protection scope claimed by the present invention.

The present invention provides a sound-generating device. The sound-generating device may be a speaker unit, a speaker module, or a terminal electronic device, such as an earphone, a mobile phone, or a tablet.

In an embodiment of the present invention, please refer to FIGS. 1 to 4. The sound-emitting device includes a housing 10, a vibration system, and a magnetic circuit system. The housing 10 is used to house a fixed vibration system and a magnetic circuit system. The vibration system includes a diaphragm 20 including a central portion 23, a folded ring portion 22 disposed around the central portion 23, and an edge portion 21 disposed around the folded ring portion 22. In addition, the diaphragm 20 may further include a center Part 23 of the composite layer. In addition, the sound-emitting device may further include a front cover (not shown in the figure), the front cover is combined above the housing 10, and the front cover and the housing 10 enclose a protective frame. Of course, in some cases, the sound emitting device may not include the front cover.

Referring to FIG. 6 together, in this embodiment, the edge portion 21 of the diaphragm 20 includes a first fixing portion 211 and a second fixing portion 212 connected to each other. The first fixing portion 211 is disposed around the folded ring portion 22 and is connected to the folded ring The second fixing portion 212 is connected to the outer edge of the first fixing portion 211, and the second fixing portion 212 is bent toward one side relative to the first fixing portion 211, for example, the second fixing portion 212 faces the folding ring portion 22 The side where it is located is bent, or the second fixing portion 212 is bent away from the folding ring portion 22.

Referring to FIG. 7, further, the sound-emitting device further includes a metal ring 30 fixed to one end of the housing 10 (this end refers to the open end of the housing 10, and the open end is located near the diaphragm 20), The metal ring 30 includes a ring-shaped body 31 and a protruding edge 32. The ring-shaped body 31 extends along the circumferential direction of the housing 10. The protrusion 32 is connected to the ring-shaped body 31 and extends along the circumference of the ring-shaped body 31. The first fixing portion 211 is fixed to the surface of the ring-shaped body 31 facing away from the housing 10, and the second fixing portion 212 is fixed to the side surface of the convex edge 32. In this embodiment, the ring-shaped body 31 may be generally arranged in a square ring shape, but it is not limited to a square ring here, and may also be a ring or a ring of other shapes, which is specifically set according to the outer shape of the sound emitting device. Optionally, the metal ring 30 is a steel ring or other materials can also be used. Optionally, the first fixing portion 211 and the second fixing portion 212 are respectively bonded to the metal ring 30. Of course, the first fixing portion 211 and the second fixing portion 212 can also be welded and fixed to the metal ring 30 respectively.

In the present invention, if the diaphragm 20 is directly bonded to the housing 10, since the folded portion 22 and the edge portion 21 of the diaphragm 20 are both thin-film structures, the strength is low, and the center cannot be supported by the edge portion 21 placed on the housing 10 When the weight of the portion 23 and the folded ring portion 22 is not solidified, the edge portion 21 is easily pulled and deformed by the weight of the center portion 23 and the folded ring portion 22 pulling the edge portion 21. In the present invention, by additionally providing a metal ring 30, the diaphragm 20 and the metal ring 30 can be fixed first, and the diaphragm 20 can be supported by other supporting structures during the fixing process to avoid the central portion 23 and The weight of the folded ring portion 22 causes the edge portion 21 to be pulled. After the adhesive is dried, the diaphragm assembly composed of the diaphragm 20 and the metal ring 30 is fixed to the housing 10, so that deformation of the diaphragm 20 can be avoided The bonding is unstable. At the same time, due to the additional protrusion 32, the second fixing portion 212 of the diaphragm 20 can be fixed to the side of the protrusion 32, and the fixing surface of the metal ring 30 for fixing the diaphragm 20 is formed by the original ring body 31 The end surface, the side surface that becomes the convex edge 32, and the end surface of the ring-shaped body 31. Since the increase of the convex edge 32 provides a part of the fixing surface for fixing the diaphragm 20, it can ensure that the diaphragm 20 and the metal ring 30 are reliably fixed At the same time, by reducing the width of the ring-shaped body 31, the inner circumference of the ring-shaped body 31 can be increased, so that the inner circumferential surface of the ring-shaped body 31 is arranged more outward than the folded ring portion 22, which can increase vibration The effective vibration area of the membrane 20 improves the sound effect of the sounding device. Alternatively, the height of the convex edge 32 may be increased to make the fixing surface between the convex edge 32 and the diaphragm 20 larger, thereby improving the connection stability between the diaphragm 20 and the metal ring 30. Furthermore, the arrangement of the convex edge 32 can play a role in strengthening the structural strength of the metal ring 30.

Please refer to FIGS. 1 to 8. In one embodiment, the convex edge 32 protrudes toward the housing 10, that is, the convex edge 32 is provided on the surface of the ring-shaped body 31 facing the housing 10, and the second fixing portion 212 is fixed On the outer side of the convex edge 32. In this embodiment, the ring-shaped body 31 is in contact with the upper surface of the housing 10, the protruding edge 32 is located on the outer peripheral surface of the housing 10, which is equivalent to inverting the metal ring 30 on the housing 10, and the protruding edge 32 and the outer peripheral surface of the housing 10 The abutment plays a positioning role, preventing the metal ring 30 from translating on the housing 10. Optionally, the connection between the upper surface of the housing 10 (that is, the surface of the housing 10 facing the diaphragm 20) and the outer peripheral surface is provided with a notch 11, and the convex edge 32 extends into the notch 11 and outside the second fixing portion 212 The side surface may be flush with the outer peripheral surface of the housing 10. The placement of the notch 11 can prevent the diaphragm 20 and the metal ring 30 from being placed beyond the outer peripheral surface of the housing 10. Furthermore, the height of the convex edge 32 can also be accommodated, so as to avoid the arrangement of the convex edge 32 from affecting the overall height of the sound generating device Increase. Optionally, the second fixing portion 212 is flush with the bottom surface of the convex edge 32, so as to ensure that the second fixing portion 212 makes full use of the outer side of the convex edge 32 to achieve effective fixing.

9 to FIG. 11, in one embodiment, the convex edge 32 protrudes away from the housing 10, that is, the convex edge 32 is provided on the surface of the ring-shaped body 31 facing away from the housing 10, and the second fixing portion 212 It is fixed to the inner side of the convex edge 32. In this embodiment, the entire lower surface of the ring-shaped body 31 is in contact with the upper surface of the housing 10, so that the contact area between the two is larger, which facilitates better fixing between the two. Optionally, the second fixing portion 212 is flush with the upper surface of the convex edge 32, so as to ensure that the second fixing portion 212 makes full use of the inner side of the convex edge 32 to achieve effective fixing.

Please refer to FIGS. 5 to 7 again. In one embodiment, the ring body 31 is provided with two convex edges 32. The two convex edges 32 are located on opposite sides of the ring body 31; correspondingly, the edge portion 21 The two second fixing portions 212 are arranged on two opposite sides of the first fixing portion 211. The two second fixing portions 212 are connected to the two convex edges 32 in one-to-one correspondence. In this embodiment, by arranging the two convex edges 32 on the opposite sides of the ring-shaped body 31, the force of the two convex edges 32 on the diaphragm 20 is the same, so that the diaphragm 20 can be symmetrically fixed, so the force is more Uniform and better stability. Optionally, the inner side surface of the convex edge 32 is flush with the inner circumferential surface of the ring-shaped body 31, and/or the outer side surface of the convex edge 32 is flush with the outer circumferential surface of the ring-shaped body 31. In one embodiment, the inner side of the convex edge 32 is flush with the inner circumferential surface of the annular body 31, and the outer side of the convex edge 32 is flush with the outer circumferential surface of the annular body 31, which is equivalent to the width of the convex edge 32 and Since the width of the ring-shaped body 31 is the same, the protrusion 32 can be prevented from exceeding the inner circumferential surface of the ring-shaped body 31 and occupying the vibration area of the diaphragm 20, and at the same time, the protrusion 32 can be prevented from exceeding the outer circumferential surface of the ring-shaped body 31 and causing sound The outer circumference of the device is too large. In addition, in the embodiment where the protruding edge 32 protrudes away from the housing 10, the first fixing portion 211 is adhesively fixed to the position of the annular body 31 where the protruding edge 32 is not provided, while the protruding edge is provided At the position 32, the first fixing portion 211 is exposed in the inner hole of the ring-shaped body 31 because the convex edge 32 blocks the ring-shaped body 31. In addition, in one embodiment, the inner side of the convex edge 32 is flush with the inner circumferential surface of the ring-shaped body 31, or the outer side of the convex edge 32 is flush with the outer circumferential surface of the ring-shaped body 31. Furthermore, in other embodiments, the convex edge 32 and the second fixing portion 212 are both ring-shaped, so that any position of the diaphragm 20 in the circumferential direction can be fixed to the convex edge 32, greatly improving the fixation of the two stability.

Optionally, the width of the ring-shaped body 31 is greater than or equal to 0.2 mm; and/or, the height of the convex edge 32 is greater than or equal to 0.15 mm. For example, the width of the ring-shaped body 31 is 0.2 mm or 0.3 mm, and the height of the convex edge 32 is 0.15 mm or 0.2 mm. It is assumed that before the convex edge 32 is not provided, the width of the metal ring 30 is 0.35 mm, that is, the width of the coated tape of the diaphragm 20 corresponds to 0.35 mm; and after the convex edge 32 is provided, the width of the ring-shaped body 31 can be reduced to 0.2mm, the height of the convex edge 32 is 0.15mm, the width of the coated tape on the diaphragm 20 is unchanged, it is still 0.35mm, so that under the condition that the fixed area of the diaphragm 20 and the metal ring 30 is unchanged, it can be reduced The width of the small metal ring 30 increases the effective vibration area of the diaphragm 20. In addition, after the convex edge 32 is provided, the height of the convex edge 32 can be set larger, and the width of the coated tape on the diaphragm 20 is correspondingly increased, thereby increasing the effective width of the coated tape on the diaphragm 20 and increasing the stability of the product connection Sex.

Referring to FIG. 12 together, the present invention also proposes a processing method for a diaphragm assembly of a sound-emitting device. The processing method includes:

Step S10, bending the edges of the ring-shaped metal sheet integrally to form a convex edge;

Step S20, the diaphragm is fixed to the metal sheet, the edge of the diaphragm is bent and extended along the side of the convex edge to form a second fixing portion, and the second fixing portion is fixed to the side of the convex edge;

The bent metal sheet constitutes a metal ring 30, and the metal ring 30 includes an annular body 31 and a protruding edge 32, and the diaphragm 20 is fixed to the annular body 31.

In this embodiment, the metal sheet is first processed into a ring shape, that is, a through hole is formed in the middle of the metal sheet, and then the edge of the metal sheet is bent. The bent portion forms the convex edge 32 of the metal ring 30. The unbent portion constitutes the annular body 31 of the metal ring 30. After the metal ring 30 is formed, the diaphragm 20 and the metal ring 30 are bonded together.

Referring to FIG. 13 together, the present invention also proposes a processing method for a diaphragm assembly of a sound-emitting device. The processing method includes:

Step S30, fixing the diaphragm and the ring-shaped metal sheet to form a diaphragm assembly;

Step S40, bending the edge of the diaphragm assembly to form a bent portion;

The diaphragm 20 on the bent portion constitutes the second fixing portion 212, the metal sheet on the bent portion constitutes the convex edge 32, and the bent metal sheet constitutes the metal ring 30.

In this embodiment, the metal sheet is processed into a ring shape, that is, a through hole is formed in the middle of the metal sheet, and then the diaphragm 20 and the metal sheet are bonded and fixed, and finally the two are bent and formed at the same time.

The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made by the description and drawings of the present invention under the inventive concept of the present invention, or directly/indirectly used in other Related technical fields are included in the patent protection scope of the present invention.

Claims

A sounding device, characterized in that it includes:

shell;

A metal ring is fixed to one end of the housing, the metal ring includes a ring-shaped body and a convex edge, the ring-shaped body extends along the circumferential direction of the shell, the convex edge is connected to the ring-shaped body, and Extending along the circumference of the annular body; and

The diaphragm includes a central portion, a folded ring portion disposed around the central portion, and an edge portion disposed around the folded ring portion, the edge portion includes a first fixing portion and a second fixing portion, the first fixing portion It is arranged around the folded ring part and fixed to the surface of the ring-shaped body facing away from the casing, the second fixing part is connected to the outer edge of the first fixing part, and fixed to the side of the convex edge .
The sound generating device according to claim 1, wherein the protrusion is protrudingly provided toward the housing, and the second fixing portion is fixed to an outer surface of the protrusion.
The sound-generating device according to claim 2, characterized in that a recess is provided between the surface of the housing facing the diaphragm and the outer peripheral surface, and the convex edge extends into the recess.
The sound generating device according to claim 1, wherein the protrusion is protrudingly provided in a direction away from the housing, and the second fixing portion is fixed to an inner surface of the protrusion.
The sound generating device according to claim 1, wherein the ring-shaped body is provided with two protruding edges, and the two protruding edges are disposed on two opposite sides of the ring-shaped body; the edge portion includes Two of the second fixing parts, two of the second fixing parts are provided on two opposite sides of the first fixing part.
The sound generating device according to claim 5, wherein the inner side surface of the convex edge is flush with the inner circumferential surface of the annular body, and/or, the outer side surface of the convex edge is equal to the annular shape The outer peripheral surface of the body is flush.
The sound emitting device according to claim 1, wherein both the convex edge and the second fixing portion have a ring shape.
The sound emitting device according to claim 1, wherein the first fixing portion and the second fixing portion are respectively bonded to the metal ring.
The sound generating device according to any one of claims 1 to 8, wherein the width of the ring-shaped body is greater than or equal to 0.2 mm; and/or, the height of the convex edge is greater than or equal to 0.15 mm.
A processing method of a diaphragm assembly for a sound-emitting device, characterized in that the processing method includes:

Bend the edge of the ring-shaped metal sheet integrally to form a convex edge;

The diaphragm is fixed to the metal sheet, an edge portion of the diaphragm is bent and extended along the side of the convex edge to form a second fixing portion, and the second fixing portion is fixed to the convex edge side;

Among them, the bent metal sheet forms a metal ring;

Alternatively, the processing method includes:

Fix the diaphragm and the ring-shaped metal sheet to form the diaphragm assembly;

Bending the edge of the diaphragm assembly to form a bent portion;

Wherein, the diaphragm on the bent portion constitutes a second fixing portion, the metal sheet on the bent portion constitutes a convex edge, and the bent metal sheet constitutes a metal ring.