Title:
DIAPHRAGM THAT MAY BE USED IN SOUND GENERATING DEVICE AND PREPARATION METHOD THEREFOR, AND SOUND GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/247911
Kind Code:
A1
Abstract:
The present invention relates to a diaphragm that may be used in a sound generating device and a preparation method therefor, and a sound generating device. A diaphragm that may be used in a sound generating device has a multi-layer composite structure, and at least one surface layer is a thermoplastic polyester elastomer film; the thermoplastic polyester elastomer is formed by the copolymerization of a polyester hard segment obtained by reacting an aromatic dicarboxylic acid with a diol and a soft segment containing an aliphatic polycarbonate; and the thickness of the diaphragm is 10-200 μm, and the loss factor of the thermoplastic polyester elastomer film in a 23°C environment is 0.1-0.3. The thermoplastic polyester elastomer of the present invention is composed of a polyester hard segment and an aliphatic polycarbonate soft segment. Said material not only solves the problems in existing thermoplastic elastomers of poor high temperature resistance and chemical resistance, but also improves sensitivity; meanwhile, said material also balances very well basic properties such as stiffness, resilience, and damping which are required for the vibration of a diaphragm.
Inventors:
WANG TING (CN)
LI CHUN (CN)
WEI QIULIN (CN)
LI CHUN (CN)
WEI QIULIN (CN)
Application Number:
PCT/CN2022/095296
Publication Date:
December 01, 2022
Filing Date:
May 26, 2022
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R31/00; H04R9/06
Foreign References:
| CN113490124A | 2021-10-08 | |||
| CN113490126A | 2021-10-08 | |||
| CN108551640A | 2018-09-18 | |||
| CN101605833A | 2009-12-16 | |||
| JP2005191993A | 2005-07-14 |
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