Invention Grant
- Patent Title: Electroacoustic transducer
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Application No.: US16831245Application Date: 2020-03-26
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Publication No.: US11178493B2Publication Date: 2021-11-16
- Inventor: Hidetoshi Hiraoka , Yoshinobu Tsujii , Keita Sakakibara , Ken Nakano
- Applicant: PANASONIC CORPORATION , KYOTO UNIVERSITY , National University Corporation YOKOHAMA National University
- Applicant Address: JP Osaka; JP Kyoto; JP Kanagawa
- Assignee: PANASONIC CORPORATION,KYOTO UNIVERSITY,National University Corporation YOKOHAMA National University
- Current Assignee: PANASONIC CORPORATION,KYOTO UNIVERSITY,National University Corporation YOKOHAMA National University
- Current Assignee Address: JP Osaka; JP Kyoto; JP Kanagawa
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JPJP2017-189165 20170928
- Main IPC: H04R9/04
- IPC: H04R9/04 ; H04R7/12 ; H04R7/18 ; H04R9/02 ; H04R9/06
Abstract:
An electroacoustic transducer includes: a diaphragm; a magnetic circuit having a magnetic gap; a frame that holds the diaphragm and the magnetic circuit; a voice coil having one end portion positioned within the magnetic gap and the other end portion coupled to the diaphragm; and a low friction material that is disposed in a sliding portion formed by the voice coil and the magnetic circuit, and includes polymer compounds swollen with liquid.
Public/Granted literature
- US20200228900A1 ELECTROACOUSTIC TRANSDUCER Public/Granted day:2020-07-16
Information query
