Title:
VIBRATING DIAPHRAGM AND SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/208471
Kind Code:
A1
Abstract:
Disclosed are a vibrating diaphragm and a sound production device. The vibrating diaphragm comprises a foamed thermoplastic polyester elastomer film layer (1), wherein the foamed thermoplastic polyester elastomer is made from a copolymer composed of a polyester hard segment A and a polyether or aliphatic polyester soft segment B by means of a foaming method; and the foamed thermoplastic polyester elastomer has a cell size of 30-150 µm, a density of 0.1-1 g/cm3 ～1g/cm 3, and a porosity of 10-90%. The vibrating diaphragm has a small mass and a high loudness, and also has a stronger structural strength.
Inventors:
HUI BING (CN)
LING FENGGUANG (CN)
LI CHUN (CN)
LIU CHUNFA (CN)
LING FENGGUANG (CN)
LI CHUN (CN)
LIU CHUNFA (CN)
Application Number:
PCT/CN2020/136115
Publication Date:
October 21, 2021
Filing Date:
December 14, 2020
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R7/02; H04R7/04; H04R7/06
Foreign References:
| CN211982127U | 2020-11-20 | |||
| CN1516521A | 2004-07-28 | |||
| CN108551640A | 2018-09-18 | |||
| CN110493686A | 2019-11-22 | |||
| CN101935405A | 2011-01-05 | |||
| US10425720B1 | 2019-09-24 | |||
| JP2003309895A | 2003-10-31 |
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