Title:
VIBRATING DIAPHRAGM AND MINIATURE SOUND PRODUCTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/208475
Kind Code:
A1
Abstract:
Disclosed are a vibrating diaphragm and a miniature sound production apparatus The vibrating diaphragm comprises a foamed rubber film layer (1) made of foamed rubber, wherein the foamed rubber is a foamed body prepared by using a foaming method; the thickness of the foamed rubber film layer (1) is 10 μm - 300 μm; and the loss factor of the foamed rubber film layer (1) is ＞0.06. The foamed rubber has excellent damping performance, and can inhibit polarization of the vibrating diaphragm during a vibration process. The vibrating diaphragm has a good comprehensive performance, and can be applied to miniature sound production apparatuses such as small speakers.
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/CN2020/136293
Publication Date:
October 21, 2021
Filing Date:
December 15, 2020
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R7/00; H04R7/02
Domestic Patent References:
| WO2004004410A1 | 2004-01-08 | |||
| WO2007083582A1 | 2007-07-26 |
Foreign References:
| CN1307437A | 2001-08-08 | |||
| CN110784805A | 2020-02-11 | |||
| CN110784806A | 2020-02-11 | |||
| CN110677789A | 2020-01-10 | |||
| CN203968355U | 2014-11-26 | |||
| EP2244488A1 | 2010-10-27 |
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