Invention Grant
- Patent Title: Electrodynamic electroacoustic transducer and electronic device
- Patent Title (中): 电动电声换能器和电子装置
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Application No.: US11578040Application Date: 2006-01-26
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Publication No.: US07885425B2Publication Date: 2011-02-08
- Inventor: Toshiyuki Matsumura , Shuji Saiki , Sawako Kano , Koji Sano
- Applicant: Toshiyuki Matsumura , Shuji Saiki , Sawako Kano , Koji Sano
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2005-021405 20050128; JP2005-225016 20050803; JP2005-262634 20050909
- International Application: PCT/JP2006/301240 WO 20060126
- International Announcement: WO2006/080405 WO 20060803
- Main IPC: H04R25/00
- IPC: H04R25/00

Abstract:
An electrodynamic electroacoustic transducer comprises: a first magnetic pole; a second magnetic pole that forms a magnetic gap between itself and the first magnetic pole and is arranged in a space excluding spaces in upper and lower face directions of the first magnetic pole; a yoke; a diaphragm; and a voice coil. The yoke magnetically couples one magnetic pole face of the first magnetic pole with one magnetic pole face of the second magnetic pole so as to support them. The diaphragm is arranged in a space in an upper face direction of the first magnetic pole and in a space in a lower face direction of the second magnetic pole, while its outer periphery is supported by the yoke. The voice coil is arranged in the magnetic gap and adhered to the diaphragm. At least one of the first magnetic pole part and the second magnetic pole part includes a magnet.
Public/Granted literature
- US20070165902A1 Electrodynamic electroacoustic transducer and electronic device Public/Granted day:2007-07-19
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