Vibrating diaphragm of sound production device and preparation method thereof, and sound production device

A sound-generating device and combined technology, applied to chemical instruments and methods, flat products, and other household appliances, can solve problems such as difficulty in demoulding

Active Publication Date: 2021-01-26
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the defects of the prior art, the main purpose of the present invention is to propose a diaphragm of a sounding device and its preparation method, and a sounding device to improve the difficulty of demolding a single-layer ethylene-propylene rubber diaphragm during the molding process, reduce the The diaphragm product is warped and deformed, and at the same time, the sensitivity of the diaphragm is effectively improved

Method used

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  • Vibrating diaphragm of sound production device and preparation method thereof, and sound production device
  • Vibrating diaphragm of sound production device and preparation method thereof, and sound production device
  • Vibrating diaphragm of sound production device and preparation method thereof, and sound production device

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preparation example Construction

[0036] In a first aspect, a method for preparing a diaphragm of a sounding device is provided, comprising the following steps:

[0037] Combine the ethylene-propylene rubber layer and the engineering plastic layer together to form a composite film;

[0038] Air pressure forming is performed on the composite film, and in the air pressure forming, the engineering plastic layer is pasted on the die head.

[0039] In the embodiment of the present application, the ethylene-propylene rubber layer is made of ethylene-propylene-diene rubber or ethylene-propylene-diene rubber.

[0040] The binary ethylene-propylene rubber is formed by polymerization of two monomers, which are ethylene monomer and propylene monomer respectively; the molecular structural formula of the binary ethylene-propylene rubber can be as follows:

[0041]

[0042] Among them, m and n are natural numbers.

[0043] The EPDM rubber is formed by polymerization of three monomers, which are ethylene monomer, propyl...

Embodiment 1

[0091] Such as figure 1 As shown, a diaphragm of a sound-generating device includes an engineering plastic layer 101 and an ethylene-propylene rubber layer 102 stacked in sequence.

[0092] The preparation method of the diaphragm comprises the following steps:

[0093] S1. The ethylene-propylene rubber layer 102 and the engineering plastic layer 101 are bonded together by thermal bonding to form a composite film; wherein, the ethylene-propylene rubber layer 102 is made of EPDM; the EPDM Formed by polymerization of three monomers, the three monomers are ethylene monomer, propylene monomer and non-conjugated diene monomer, and the non-conjugated diene monomer is ethylidene norbornene (ENB); The ethylene-propylene rubber layer 102 is formed by a calendering process; the surface of the engineering plastic layer 101 undergoes surface activation treatment before compounding;

[0094] S2. Perform air pressure forming on the composite film, and in the air pressure forming, the engin...

Embodiment 2

[0099] Such as figure 2 As shown, a diaphragm of a sound generating device includes a first engineering plastic layer 201 , an ethylene-propylene rubber layer 202 and a second engineering plastic layer 203 stacked in sequence.

[0100] The preparation method of the diaphragm comprises the following steps:

[0101] S1. The first engineering plastic layer 201, the ethylene-propylene rubber layer 202 and the second engineering plastic layer 203 are bonded together by thermal bonding to form a composite film; wherein, the ethylene-propylene rubber layer 202 is made of EPDM rubber into; the EPDM rubber is formed by polymerization of three monomers, the three monomers are respectively ethylene monomer, propylene monomer and non-conjugated diene monomer, and the non-conjugated diene monomer adopts bicyclic Pentadiene (DCPD); the ethylene-propylene rubber layer 202 is formed by a coating process; the surfaces of the first engineering plastic layer 201 and the second engineering plas...

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Abstract

The invention discloses a vibrating diaphragm of a sound production device and a preparation method thereof, and the sound production device. The preparation method comprises the following steps thatan ethylene propylene rubber layer and an engineering plastic layer are compounded together to form a composite diaphragm; and the composite diaphragm is subjected to air pressure forming treatment, and in the air pressure forming process, the engineering plastic layer is attached to a die head. According to the vibrating diaphragm, the vibrating diaphragm compounds the ethylene propylene rubber layer and the engineering plastic layer to form a composite structure, and the inventor accidentally finds that the composite structure generates function complementation and synergistic interaction, achieves unexpected technical effects, and effectively improves sensitivity; and the vibrating diaphragm is prepared in an air pressure forming mode, in the air pressure forming process, the engineering plastic layer is attached to the die head, the rubber layer is arranged on the engineering plastic layer, through the arrangement, the problem that the single-layer ethylene propylene rubber vibrating diaphragm is difficult to demold in the forming process is solved, buckling deformation of a vibrating diaphragm product is reduced, and the boundary dimension of the vibrating diaphragm is ensuredto meet design and use requirements.

Description

technical field [0001] The invention relates to the field of acoustic products, in particular to a diaphragm of a sounding device, a preparation method thereof, and a sounding device. Background technique [0002] With the rapid development of electronic information technology, more and more sound generating devices are applied to various electronic products, especially mobile communication equipment widely used by people. People not only care about its miniaturization and multi-function, but also require its voice effect High quality, no distortion. The diaphragm is the core component of the sound-generating device, and its design directly affects the performance of the acoustic device. [0003] Among the existing sounding devices, compared with the multi-layer composite structure diaphragm, the single-layer vulcanized rubber diaphragm has a simple production process and good comprehensive performance, and is becoming popular; while the single-layer ethylene-propylene rubb...

Claims

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Application Information

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IPC IPC(8): B29D7/01B32B25/16B32B25/08B32B27/28B32B27/36B32B27/34B32B33/00
CPCB29D7/01B32B25/16B32B25/08B32B27/288B32B27/36B32B27/34B32B27/286B32B33/00B32B2250/24
Inventor周厚强李春
OwnerGOERTEK INC