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Composite vibrating diaphragm of sound production device and sound production device

A technology of sound-emitting device and rubber layer, which is applied in the direction of diaphragm structure, synthetic resin layered products, chemical instruments and methods, etc., to achieve the effect of satisfying the degree of tolerance and meeting the needs of experience.

Pending Publication Date: 2020-11-13
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 composite diaphragm of a sound generating device and a sound generating device, so as to improve the reliability of the existing composite diaphragm structure, and prevent delamination or even membrane rupture after long-term vibration problems while significantly improving the overall temperature resistance of the diaphragm

Method used

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  • Composite vibrating diaphragm of sound production device and sound production device
  • Composite vibrating diaphragm of sound production device and sound production device

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preparation example Construction

[0056] In a second aspect, a method for preparing a composite diaphragm of a sounding device is provided, comprising the following steps:

[0057] A rubber layer is provided, wherein, the rubber layer is prepared by: forming a film body through a film-forming process, and drying the film body at a low temperature to form an uncrosslinked rubber layer or a semi-crosslinked rubber layer;

[0058] Laminating the rubber layer and the thermoplastic elastomer layer to form a composite film;

[0059] The composite film is molded to form a vibrating film.

[0060] In the embodiment of the present application, the drying process of the rubber layer adopts a low-temperature drying method so that it does not produce chemical crosslinking or semi-chemical crosslinking; then the rubber layer and the thermoplastic elastomer layer are bonded to form a composite film, and the composite film is The diaphragm is chemically cross-linked and set during molding. The composite diaphragm prepared ...

Embodiment 1

[0067] Such as figure 1 As shown, a composite diaphragm of a sounding device is composed of a layer of thermoplastic elastomer layer 101 and a layer of rubber layer 102. The rubber layer 102 is made of ethylene-vinyl acetate rubber; the rubber layer 102 The thickness is 30 μm.

[0068] The ethylene-vinyl acetate rubber is formed by copolymerization of ethylene and vinyl acetate, and the content of the vinyl acetate is 40% of the total amount of the ethylene-vinyl acetate rubber.

[0069] The hardness of the rubber layer 102 is 30A; the dissipation factor of the rubber layer 102 is greater than 0.05 at room temperature.

[0070] The thickness of the thermoplastic elastomer layer 101 is 15 μm; the material of the thermoplastic elastomer layer 101 is selected from TPEE (polyester elastomer).

Embodiment 2

[0072] Such as figure 2 As shown, a composite diaphragm of a sounding device includes a first thermoplastic elastomer layer 201, a rubber layer 202 and a second thermoplastic elastomer layer 203 laminated in sequence, and the rubber layer 202 is made of ethylene-vinyl acetate rubber ; The thickness of the rubber layer 202 is 15 μm.

[0073] The ethylene-vinyl acetate rubber is formed by copolymerization of ethylene and vinyl acetate, and the content of the vinyl acetate is 60% of the total amount of the ethylene-vinyl acetate rubber.

[0074] The hardness of the rubber layer 202 is 65A; the dissipation factor of the rubber layer 202 is greater than 0.1 at room temperature.

[0075] The thickness of the first thermoplastic elastomer layer 201 is 15 μm; the material of the first thermoplastic elastomer layer 201 is selected from TPEE (polyester elastomer).

[0076] The thickness of the second thermoplastic elastomer layer 203 is 15 μm; the material of the second thermoplastic...

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Abstract

The invention discloses a composite vibrating diaphragm of a sound production device and the sound production device, the composite vibrating diaphragm comprises at least one thermoplastic elastomer layer and at least one rubber layer, the rubber layer is made of ethylene-vinyl acetate rubber, and the thickness of the rubber layer is 10-120 [mu]m. The composite vibrating diaphragm generates complementary functions and synergistic interaction, an unexpected technical effect is achieved, compared with the prior art, the bonding force between the thermoplastic elastomer layer and the rubber layeris increased, the reliability of the existing composite vibrating diaphragm structure is improved, the problems of layering and even diaphragm breaking after long-term vibration are avoided, the overall temperature resistance of the vibrating diaphragm is remarkably improved, and the problems of product breakage, collapse and the like after high power, large amplitude or high voltage are solved.

Description

technical field [0001] The invention relates to the field of acoustic products, in particular to a composite diaphragm of a sound generating device and the sound generating 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] The diaphragms of existing sounding devices are mostly composite diaphragms, especially the composite diaphragms of thermoplastic elastomer layers and adhesive film layers (such as acrylic glue, silica gel, etc.), which have high damping properties , Resilience. With the improvement...

Claims

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Application Information

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IPC IPC(8): B32B25/14B32B25/08B32B27/36H04R7/02H04R31/00
CPCB32B25/08B32B25/14B32B27/36H04R7/02H04R31/003
Inventor 闫付臻周厚强李春
Owner GOERTEK INC
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