Invention Grant
- Patent Title: Voice coil motors and magnetic circuits therefor
- Patent Title (中): 音圈电机及其磁路
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Application No.: US12051700Application Date: 2008-03-19
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Publication No.: US08194358B2Publication Date: 2012-06-05
- Inventor: Hiroyuki Yamada , Daiki Kato , Keiji Nagamiya
- Applicant: Hiroyuki Yamada , Daiki Kato , Keiji Nagamiya
- Applicant Address: JP Tokyo
- Assignee: Shin-Etsu Chemical Co., Ltd.
- Current Assignee: Shin-Etsu Chemical Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2007-072789 20070320
- Main IPC: G11B5/55
- IPC: G11B5/55 ; G11B21/08 ; G11B5/56 ; G11B21/24
Abstract:
A magnet of rectangular prism or parallelepiped prism shape is disposed on a yoke having a triangle shape or a frusto-triangular shape to construct a magnetic circuit for a voice coil motor. The magnetic circuits facilitate positioning and holding of a moving coil, and the voice coil motor is improved in positioning precision of a magnetic head.
Public/Granted literature
- US20080231997A1 VOICE COIL MOTORS AND MAGNETIC CIRCUITS THEREFOR Public/Granted day:2008-09-25
Information query
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