Title:
DIAPHRAGM AND SOUND PRODUCTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/208473
Kind Code:
A1
Abstract:
A diaphragm and a sound production apparatus, the diaphragm comprising a foam rubber film layer made of foam rubber (1), said foam rubber being a foam prepared using a foaming method and having a foam pore size of 10μm to 300μm, a glass transition temperature of ≤-10°C, and a density of 0.1g/cm3 to 1.2g/cm3. Because the foam pores are uniformly distributed in the foam rubber material, overall material density is reduced, weight is reduced for identical dimensions, and the manufactured diaphragm has good resilience properties.
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/CN2020/136207
Publication Date:
October 21, 2021
Filing Date:
December 14, 2020
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R7/06; H04R7/10; H04R9/06
Foreign References:
| JPS57160300A | 1982-10-02 | |||
| JPS5950697A | 1984-03-23 | |||
| CN206365016U | 2017-07-28 | |||
| CN110708638A | 2020-01-17 | |||
| CN110691305A | 2020-01-14 | |||
| CN203851283U | 2014-09-24 | |||
| CN210327897U | 2020-04-14 |
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