BONE CONDUCTION MICROPHONE AND MOBILE TERMINAL

WIPO Patent Application WO/2022/062001

A1

Provided in the present utility model are a bone conduction microphone and a mobile terminal. The microphone comprises a first base plate, a second base plate, a cover plate, a backing plate, a first diaphragm, and a housing, which are stacked in sequence. The first base plate, the second base plate, and the cover plate enclose to form a rear cavity. The cover plate, the backing plate, and the first diaphragm enclose to form a middle cavity. The first diaphragm and the housing enclose form a front cavity. The first diaphragm is provided with a first vent hole, and the position on the cover plate corresponding to the first vent hole is provided with a second vent hole. The microphone also comprises an inverted tube that penetrates through the backing plate and is connected the first vent hole and the second vent hole, as well as a MEMS chip that is located in the rear cavity and is provided on an inner side of the cover plate. The MEMS chip has a back cavity and a second diaphragm. A vent hole connecting the back cavity and the rear cavity is formed on the second diaphragm, and an acoustic hole is provided on the cover plate in correspondence with the back cavity. The present utility model can effectively improve the sensitivity of a bone conduction microphone.

ZHANG JINYU (CN)

PCT/CN2020/121815

March 31, 2022

October 19, 2020

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AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)

H04R19/04

CN110300364A	2019-10-01
CN110300362A	2019-10-01
CN101959107A	2011-01-26
CN210579224U	2020-05-19
CN209526834U	2019-10-22
KR101222922B1	2013-01-17
JP2017183859A	2017-10-05
US20170359648A1	2017-12-14

HENSEN INTELLECTUAL PROPERTY FIRM (CN)

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