Invention Grant
- Patent Title: Speaker
- Patent Title (中): 扬声器
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Application No.: US11447332Application Date: 2006-06-06
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Publication No.: US07864976B2Publication Date: 2011-01-04
- Inventor: Hideo Kitazawa , Akinori Ushikoshi , Takamasa Kaneko , Kenji Yokoyama
- Applicant: Hideo Kitazawa , Akinori Ushikoshi , Takamasa Kaneko , Kenji Yokoyama
- Applicant Address: JP
- Assignee: Nidec Pigeon Corporation
- Current Assignee: Nidec Pigeon Corporation
- Current Assignee Address: JP
- Agency: Cantor Colburn LLP
- Priority: JP2005-167530 20050607
- Main IPC: H04R1/00
- IPC: H04R1/00 ; G01R3/00
Abstract:
A speaker may include a voice coil bobbin and a center pole. The voice coil bobbin may include a nonmetallic pipe body as a base of the voice coil bobbin, a first nonmagnetic and electric conductor film which is formed on an inner peripheral face of the pipe body, and a second electric conductor film which is formed on an outer peripheral face of the pipe body such that the first electric conductor film is covered by the second electric conductor film through the pipe body. An electrostatic capacity that is formed between the voice coil bobbin and the center pole is detected and outputted as an electric signal.
Public/Granted literature
- US20060290481A1 Speaker Public/Granted day:2006-12-28
Information query
