Title:
SOUND PRODUCING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/107618
Kind Code:
A1
Abstract:
A sound producing device comprises: a magnetic circuit system (19) configured to form a magnetic field; and a vibration system comprising a voice coil (16), a diaphragm (11), and a reinforcement layer (15). One end of the voice coil (16) is connected to a center portion of the diaphragm (11), and the other end is located in a magnetic field. The reinforcement layer (15) is disposed in the center portion, and comprises a carbon fiber prepreg layer (26). The diameter of carbon fibers in the carbon fiber prepreg layer (26) is less than or equal to 7 μm. The carbon fibers located in the same layer are unidirectional and disposed side by side.
Inventors:
LI MEILING (CN)
LING FENGGUANG (CN)
ZHENG ZEDONG (CN)
ZHANG CHENGFEI (CN)
LI CHUN (CN)
LING FENGGUANG (CN)
ZHENG ZEDONG (CN)
ZHANG CHENGFEI (CN)
LI CHUN (CN)
Application Number:
PCT/CN2018/124938
Publication Date:
June 04, 2020
Filing Date:
December 28, 2018
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R9/02; H04R9/06
Domestic Patent References:
| WO2014141389A1 | 2014-09-18 |
Foreign References:
| CN207968945U | 2018-10-12 | |||
| CN109660919A | 2019-04-19 | |||
| CN109672965A | 2019-04-23 | |||
| CN206433152U | 2017-08-22 | |||
| CN207124752U | 2018-03-20 | |||
| CN207475855U | 2018-06-08 |
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