WO2021134251A1

WO2021134251A1 - Diaphragm forming mold

Info

Publication number: WO2021134251A1
Application number: PCT/CN2019/130022
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: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-08

Abstract

The present application provides a diaphragm forming mold, characterized by comprising a base body and a folding-ring forming portion provided on the base body; the folding-ring forming portion comprises edge portions and corner portions, two ends of each corner portion are respectively connected to the edge portions, and the height of the middle part of each corner portion relative to the base body is not equal to the heights of two ends of the corner portion connected to edge portions relative to the base body. Two ends of a corner portion are respectively connected to the edge portions, and the height of the middle part of the corner portion is set to be greater than the heights of two ends of the corner portion connected to the edge portions, and thus with regard to a diaphragm material having a relatively large shrinkage rate, the height of the middle part of a corner portion of a folding-ring formed after shrinkage is equal to the heights of two ends of the corner portion; and a diaphragm formed by the diaphragm forming mold in this embodiment has good pure tone, symmetrical amplitude, and excellent performance.

Description

Diaphragm forming mold

Technical field

This application relates to the field of electroacoustics, and in particular to a diaphragm forming mold.

Background technique

In today's mobile Internet era, the number of smart mobile terminal devices continues to increase, and the requirements for mobile terminals are also getting higher and higher, one of which is the requirement for high-quality sound quality functions.

The diaphragm is an important component of the speaker, and it plays a vital role in the sound reproduction performance of the speaker. It determines the conversion quality of the speaker from electricity to sound. The forming of the diaphragm is usually by placing the material of the diaphragm in a mold and then forming it by high temperature pressure.

technical problem

The structure of the conventional diaphragm forming mold is designed to have the same height of the entire folding ring forming part. This structure is aimed at the diaphragm material with a large shrinkage rate after molding, which will cause the diaphragm formed by the existing diaphragm forming mold to become weak. The height of the middle part of the corner of the folded ring is not equal to the height of the two ends of the corner. For conventional products, this will cause problems such as asymmetric amplitude and poor performance.

Therefore, it is necessary to provide a new type of diaphragm forming mold to solve the above-mentioned problems.

Technical solutions

The purpose of the present application is to provide a diaphragm forming mold that can make the heights of the middle and both ends of the corners of the formed folding ring consistent with better performance.

The technical solution of the present application is as follows: a diaphragm forming mold, comprising a seat body and a folding ring forming part provided on the seat body, the folding ring forming part includes a side part and a corner part, two of the corner part The ends are respectively connected to the side portions, and the height of the middle portion of the corner portion relative to the seat body is not equal to the height of the two ends of the corner portion relative to the seat body.

As an improvement, the height of the middle portion of the corner portion relative to the seat body is higher than the height of the two ends of the corner portion connected with the side portion relative to the seat body.

As an improvement, the height of the corner relative to the seat body is gradually increased in the direction from the two ends of the corner portion connected with the adjacent side portion to the middle portion of the corner portion.

As an improvement, the height of the middle portion of the corner portion relative to the seat body is lower than the height of the two ends of the corner portion connected with the side portion relative to the seat body.

As an improvement, the height of the corner relative to the seat body is gradually reduced in the direction from the two ends of the corner portion connected with the adjacent side portion to the middle portion of the corner portion.

As an improvement, the two ends connected with the corner portion and the side portion have the same height relative to the seat body.

As an improvement, the height of the side portion relative to the seat body is equal to the height of the two ends of the corner portion relative to the seat body.

As an improvement, the side portion includes a long side portion disposed oppositely and a short side portion disposed oppositely, and two ends of the corner portion are respectively connected to the long side portion and the short side portion.

As an improvement, a wrinkle groove is provided on the folding ring forming part.

Beneficial effect

The beneficial effect of the present application is that the two ends of the corner are respectively connected to the side, and the height of the middle of the corner is set to be unequal to the height of the two ends of the corner, and then for the diaphragm material with a larger shrinkage rate, after shrinking The height of the middle part of the corner of the formed folding ring can be made equal to the height of the two ends of the corner. The diaphragm formed by the diaphragm molding die in this embodiment has better pure sound, more symmetrical amplitude, and better performance.

Description of the drawings

Fig. 1 is a schematic diagram of the overall structure of a mold holder according to an embodiment of the application;

Figure 2 is a cross-sectional view taken along the line A-A shown in Figure 1;

3 is a schematic side view of the mold base facing the long side portion of an embodiment of the application;

4 is a schematic side view of the mold base facing the short side portion of an embodiment of the application;

FIG. 5 is a schematic diagram of the overall structure of a mold holder according to another embodiment of the application;

Figure 6 is a cross-sectional view taken along the line B-B shown in Figure 5;

FIG. 7 is a schematic side view of the mold base facing the long side portion according to another embodiment of the application; FIG.

FIG. 8 is a schematic side view of the mold base facing the short side of another embodiment of the application;

FIG. 9 is a schematic diagram of the overall structure of the diaphragm formed by the diaphragm forming mold of the embodiment of the application.

Embodiments of the present invention

The application will be further described below in conjunction with the drawings and implementations.

1 and 9, an embodiment of the present application provides a diaphragm forming mold. The diaphragm forming mold of this embodiment includes a mold base 100 and a mold head matched with the mold base 100. Specifically, in the mold base The material of the vibrating membrane 300 is placed between 100 and the die head, the mold base 100 and the die head are closed, and the vibrating membrane 300 is formed after high temperature pressure molding.

For some diaphragms 300, which are made of single-layer or multi-layer polymer materials, the diaphragm 300 is a relatively flexible structure, which is easy to shrink and deform after being formed under high-temperature pressure and cooled.

1, the mold seat 100 in this embodiment includes a seat body 110 and a folding ring forming part 120. The folding ring forming part 120 is disposed on the upper surface 101 of the seat body 110. Preferably, the upper surface 101 is a flat surface. In some embodiments, the upper surface 101 of the seat body 110 may also be a curved surface. Preferably, the folding ring forming part 120 and the seat body 110 are integrally formed.

1 to 8, in this embodiment, the upper surface 101 is a flat surface, and the folded ring forming part 120 includes a side 121 and a corner 122. The two ends of the corner 122 are respectively connected to the adjacent side 121, and the corner 122 The height H of the middle part relative to the base 110 is not equal to the height M of the two ends of the corner 122 relative to the base 110. It should be noted that the height relative to the base 110 in this embodiment refers to The height of the upper surface 101 of the base 110.

In order to realize the technical solution of this embodiment, there are two solutions that can be implemented. The first solution is to make a compensation setting in the middle of the corner 122, so that the height H of the middle of the corner 122 with respect to the base 110 is equal to the height H of the corner 122. The height M of the end relative to the base 110 is not equal. The second solution is to make compensation settings at both ends of the corner 122, for example, slotting at both ends of the corner 122, etc. Through the second solution, the height M of the two ends of the corner 122 relative to the base 110 and the corner can be made. The height H of the middle portion of 122 relative to the base 110 is not equal.

In the existing diaphragm forming mold, the height of the folding ring forming part 120 is equal to the height of the base 110. However, for the material of the part of the diaphragm 300, the shrinkage rate after molding is relatively large, which causes the molded diaphragm 300 to become thinner. The height of each position of the corner 301 of the folded ring is not consistent,

The diaphragm molding die in this embodiment sets the height H of the middle of the corner 122 to be different from the height M of the two ends of the corner 122, and for the diaphragm 300 material with a large shrinkage rate, it can be molded after shrinking. The height of the middle portion of the corner portion 301 of the folding ring is equal to the height of the two ends of the corner portion 122. The diaphragm 300 formed by the diaphragm molding die in this embodiment has better pure sound, more symmetrical amplitude, and better performance.

Figures 1 to 4 are the first embodiment provided by this application. In this embodiment, the height H of the middle of the corner 122 relative to the base 110 is higher than the height M of the two ends of the corner 122 relative to the base 110 .

In this embodiment, from the two ends of the corner 122 to the middle of the corner 122, the height of the corner 122 relative to the base 110 is gradually increased.

In some embodiments, from the two ends of the corner 122 to the middle of the corner 122, the height of the corner 122 relative to the base 110 gradually increases, but the height of the corner 122 relative to the base 110 increases. There are differences. Preferably, the closer to the middle of the corner 122, the greater the height of the corner 122 relative to the base 110. Compared with some materials of the diaphragm 300, the closer to the middle of the corner 122, the greater the shrinkage rate. In this embodiment, the height of each position of the corner 301 of the fold ring of the diaphragm 300 after the diaphragm molding die is formed More consistent.

Preferably, the height M of the two ends connected with the corner 122 and the side 121 relative to the base 110 is equal.

5-8 is another embodiment of this application. In another embodiment, the center of the folding ring corner 301 of the diaphragm 300 formed by other existing diaphragm forming molds is relative to the base 110 The height is higher than the height of its ends. In order to solve this problem, the height H1 of the middle portion of the corner portion 122 relative to the seat body in this embodiment is lower than the height M1 of the two ends of the corner portion and the side portion connected to the seat body. Furthermore, for the diaphragm 300 material with a large shrinkage rate, after shrinking, the height H1 of the middle portion of the corner portion 301 of the molded ring can be made equal to the height M1 of the two ends of the corner portion 122. The diaphragm molding die in this embodiment is molded The pure tone of the diaphragm 300 is better, the amplitude is more symmetrical, and the performance is better.

Preferably, from the two ends of the corner to the middle of the corner, the height of the corner relative to the seat body is gradually reduced.

Preferably, the height M1 of the two ends connected with the corner portion and the side portion relative to the seat body is equal.

1 to 8, the height of each position of the side 121 relative to the base 110 in this embodiment is the same.

1 to 4, in some embodiments, the height L of the side 121 relative to the base 110 is lower than the height h of the middle portion of the corner 122 relative to the base 110.

Preferably, the height L of the side 121 relative to the base 110 is equal to the height M of the two ends of the corner 122 relative to the base 110.

5-8, in another embodiment, the height L1 of the side 121 relative to the base 110 is higher than the height H1 of the middle portion of the corner 122 relative to the base 110.

Preferably, the height L1 of the side 121 relative to the base 110 is equal to the height M1 of the two ends of the corner 122 relative to the base 110.

1 to 8, in this embodiment, the side 121 includes a long side 121a and a short side 121b, both ends of the corner 122 are connected to the long side 121a and the short side 121b, preferably, the side 121 has two opposite long side portions 121 a and two opposite short side portions 121 b, and the long side portion 121 a and the short side portion 121 b are connected by a corner portion 122. Preferably, the long side portion 121a is a straight side, and the short side portion 121b is a straight side. In this embodiment, the long side portion 121a, the short side portion 121b, and the corner portion 122 form a rectangle-like shape, that is, the The folded ring forming part 120 is set in a shape similar to a rectangle. Of course, the folded ring forming part 120 in this embodiment can also be set in an elliptical, square or other shape.

In other embodiments, the long side 121a can also be an arc-shaped side, and the short side 121b can also be an arc-shaped side. Of course, the long side 121a and the short side 121b can also be other non-straight sides. The shape is also within the protection scope of this embodiment.

It should be noted that the shape of the side 121 in this embodiment is not limited, and it may be an arc-shaped side, a straight side, etc., or other shapes.

Preferably, the height of the long side portion 121a relative to the base 110 and the height of the short side portion 121b relative to the base 110 are equal. Of course, in some embodiments, the long side portion 121a and or the short side portion 121b can also be compensated for height increase or height reduction, depending on the nature of the material of the diaphragm 300.

In other embodiments, for some materials of the diaphragm 300, these materials will shrink slightly after molding, so that the existing diaphragm molding mold forms the middle of the corner 301 of the fold ring of the diaphragm 300 after molding. The height of is not equal to the height of the two ends of the corner and the height of the edge 302 of the folding ring. In this embodiment, the middle of the corner of the folding ring of the diaphragm forming mold of this embodiment is set relative to the height of the seat 110 It is not equal to the height of the two ends of the corner, so that the folding ring of the diaphragm 300 formed by the diaphragm forming mold in this embodiment has the height of the two ends of the corner relative to the height of the base 110 and the middle of the corner relative to The height of the base 110 is equal.

1-9, the folding ring forming part 120 in this embodiment is provided with a plurality of fold grooves 123. Preferably, the plurality of fold grooves 123 are evenly spaced on the folding ring forming part 120. Of course, it can also be related to folding. The center of the ring forming part 120 is symmetrically arranged, or it may be arranged irregularly. By providing the corrugated grooves 123, a corrugated part 303 can be formed on the folded ring of the molded diaphragm 300, and the corrugated part 303 can further strengthen the diaphragm 300. The strength of the folding ring increases the service life.

9, FIG. 9 is the diaphragm 300 formed by the diaphragm molding die in this embodiment. The heights of the corners 301 of the fold ring of the diaphragm 300 are equal, and the corners 301 of the fold ring have the same height. The height is equal to the height of the edge 302 of the folding ring. Furthermore, the height W of each position of the folding ring of the diaphragm 300 is the same. The pure sound of the diaphragm 300 formed by the diaphragm forming mold in this embodiment is better , The amplitude is more symmetrical, and the performance is better.

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 diaphragm forming mold, characterized in that it comprises a seat body and a folding ring forming part arranged on the seat body, the folding ring forming part includes a side part and a corner part, and both ends of the corner part are connected with each other respectively. The adjacent side portions are connected, and the height of the middle portion of the corner portion relative to the seat body is not equal to the height of the two ends of the corner portion relative to the seat body.
The diaphragm forming mold according to claim 1, wherein the height of the middle portion of the corner portion relative to the seat body is higher than the two ends of the corner portion connected with the side portion relative to the seat body. The height of the body.
The diaphragm molding die according to claim 2, wherein the direction from the two ends of the corner portion connected with the adjacent side portion to the middle portion of the corner portion, the corner portion is relative to the The height of the seat body is gradually increased.
The diaphragm forming mold according to claim 1, wherein the height of the middle portion of the corner portion relative to the seat body is lower than the two ends of the corner portion connected with the side portion relative to the seat body. The height of the body.
The diaphragm molding die according to claim 4, wherein the direction from the two ends of the corner portion connected with the adjacent side portion to the middle portion of the corner portion, the corner portion relative to the The height of the seat body is gradually reduced.
5. The diaphragm forming mold according to any one of claims 1 to 5, wherein the two ends connected with the corner portion and the side portion have the same height relative to the base.
7. The diaphragm forming mold according to claim 6, wherein the height of the side portion relative to the seat body is equal to the height of the two ends of the corner portion relative to the seat body.
The diaphragm forming mold according to any one of claims 1 to 5, wherein the side portion includes a long side portion disposed oppositely and a short side portion disposed oppositely, and both ends of the corner portion are connected to each other. The long side portion and the short side portion are connected.
5. The diaphragm forming mold according to any one of claims 1 to 5, wherein the folding ring forming part is provided with a wrinkle groove.