Title:
VIBRATING DIAPHRAGM FOR MINIATURE SOUND-PRODUCING DEVICE AND MINIATURE SOUND-PRODUCING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/216179
Kind Code:
A1
Abstract:
Disclosed are a vibrating diaphragm for a miniature sound-producing device and a miniature sound-producing device. The vibrating diaphragm for the miniature sound-producing device is made of a polyacrylate copolymer. The polyacrylate copolymer is mixed with a plasticizer. The plasticizer comprises at least one of aliphatic diacid esters, phthalic acid esters, phenyl polyacid esters, benzoates, polyhydric alcohol esters, chlorinated hydrocarbons, epoxides, citrates and polyesters. The glass transition temperature of the vibrating diaphragm is in the range of -70°C to 0°C. The vibrating diaphragm is configured such that the adhesive force between the vibrating diaphragm and the adhesive layer during assembly is greater than 100 g/25 mm (180° peeling). The vibrating diaphragm provided by the present invention has better acoustic performance.
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| WO/2009/137495 | ELECTROSTATIC LOUDSPEAKER SYSTEM |
Inventors:
HUI BING (CN)
LING FENGGUANG (CN)
WANG TING (CN)
LI CHUN (CN)
LIU CHUNFA (CN)
LING FENGGUANG (CN)
WANG TING (CN)
LI CHUN (CN)
LIU CHUNFA (CN)
Application Number:
PCT/CN2020/085641
Publication Date:
October 29, 2020
Filing Date:
April 20, 2020
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R7/10; H04R9/02; H04R9/06
Domestic Patent References:
| WO2016027767A1 | 2016-02-25 | |||
| WO2017136280A1 | 2017-08-10 |
Foreign References:
| CN103080260A | 2013-05-01 | |||
| CN103756602A | 2014-04-30 | |||
| CN102732176A | 2012-10-17 |
Other References:
FANG YI: "The Study of Preparation and Application on Heat Resisting Water Swelling Rubber Material", CHINA MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING TECHNOLOGY, no. 4, 15 April 2018 (2018-04-15), pages 1 - 74, XP055867747
See also references of EP 3962109A4
See also references of EP 3962109A4
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