Title:
DIAPHRAGM APPLICABLE TO SOUND GENERATING DEVICES, AND SOUND GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/253106
Kind Code:
A1
Abstract:
The present invention relates to a diaphragm applicable to sound generating devices, and a sound generating device. The diaphragm applicable to sound generating devices comprises a thermoplastic polyester elastomer film layer formed by means of copolymerization of a polynaphthalate hard segment and a polyether and/or aliphatic polyester soft segment, wherein the diaphragm has a thickness of 10-200 μm, and the thermoplastic polyester elastomer film layer has a loss factor of 0.1-0.3 in an environment at 23ºC. The sound generating device comprises a vibration system and a magnetic circuit system coordinated with the vibration system, wherein the vibration system comprises the diaphragm and a voice coil attached to one side of the diaphragm. By means of the present invention, the problem of poor resistance of existing elastomers to high and low temperatures is solved, both the stiffness and the resilience required by the vibration of the diaphragm are well achieved, and the basic problems of damping, etc. are well overcome, so that the diaphragm has lower distortion and greatly improved acoustic performance.
Inventors:
WANG TING (CN)
LI CHUN (CN)
LI CHUN (CN)
Application Number:
PCT/CN2022/095312
Publication Date:
December 08, 2022
Filing Date:
May 26, 2022
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R9/02; H04R31/00; H04R9/04; H04R9/06
Foreign References:
| CN113490125A | 2021-10-08 | |||
| JP2003179993A | 2003-06-27 | |||
| CN109005487A | 2018-12-14 | |||
| CN112468937A | 2021-03-09 | |||
| CN206658291U | 2017-11-21 |
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