VIBRATION DIAPHRAGM OF SOUND PRODUCING DEVICE AND SOUND PRODUCING DEVICE

WIPO Patent Application WO/2020/248718

A1

Disclosed in the present invention are a vibration diaphragm of a sound producing device and a sound producing device. The vibration diaphragm comprises at least one elastomer layer, the elastomer layer being made of a hydrogenated butyronitrile polymer, the hydrogenated butyronitrile polymer containing acrylonitrile blocks, the content of the acrylonitrile blocks in the hydrogenated butyronitrile polymer ranging from 10wt% to 70 wt%, a vulcanizing agent being added into the hydrogenated butyronitrile polymer, and the content of the vulcanizing agent being 1% to 15% of the total amount of the hydrogenated butyronitrile polymer. The vibration diaphragm of the present invention has good rebound resilience, is able to maintain high elasticity in a low-temperature environment, and is able to operate in a high-temperature environment for a long period of time. Therefore, the sound producing device can be used in an extremely harsh environment, with the acoustic performance thereof maintaining a good state.

HUI BING (CN)
WANG SHUQIANG (CN)
LING FENGGUANG (CN)
LI CHUN (CN)
LIU CHUNFA (CN)

PCT/CN2020/085753

December 17, 2020

April 21, 2020

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GOERTEK INC (CN)

H04R7/14

CN110267167A	2019-09-20
CN106957466A	2017-07-18
CN106817658A	2017-06-09
US20150208148A1	2015-07-23
US20170251307A1	2017-08-31

LI, MIN: "Study on the characteristics of hydrogenated nitrile rubber", WORLD RUBBER INDUSTRY, vol. 29, no. 1, 28 February 2002 (2002-02-28), CN, pages 2 - 13, XP009532387, ISSN: 1000-4408
See also references of EP 3985996A4

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