Title:
【発明の名称】ムービング磁石構造を有する電気-音響変換器及びその変換方法
Document Type and Number:
Japanese Patent JP3421654
Kind Code:
B2
Abstract:
Disclosed is an electric-acoustic transducer comprising at least one fixed coil adapted to generate alternating magnetic field upon externally receiving an electrical drive signal, a frame having a recessed structure for centrally receiving and supporting the fixed coil, at least one moving permanent magnet disposed over the fixed coil while being spaced from the fixed coil by a desired vertical distance in such a fashion that it is vertically movable, the moving permanent magnet serving to generate non-alternating magnetic field, and a vibrating diaphragm supported by an upper end of the frame at a peripheral portion thereof, the vibrating diaphragm supporting the permanent magnet by a central portion thereof, whereby the vibrating diaphragm vibrates vertically in accordance with an interaction between the alternating magnetic field generated from the fixed coil and the non-alternating magnetic field generated from the permanent magnet.
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Inventors:
Yoo, Dong Ok
Yoo, Ok Jun
Yoo, Ok Jun
Application Number:
JP2000584722A
Publication Date:
June 30, 2003
Filing Date:
November 19, 1999
Export Citation:
Assignee:
Microtech-Corporation
International Classes:
G10K9/12; G10K9/13; H04R11/02; H04R13/00; (IPC1-7): H04R11/02; G10K9/12; G10K9/13; H04R13/00
Domestic Patent References:
| JP227896A | ||||
| JP58138199A |
Attorney, Agent or Firm:
Takehiko Suzue (5 outside)
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