Permanent magnet member for coil motor and voice coil motor

Details Permanent magnet member for coil motor and voice coil motor Permanent magnet member for coil motor and voice coil motor

2009-08-03

2010-12-28

Zarroli, Michael C (Department: 2839)

Electrical generator or motor structure

Dynamoelectric

Linear

C335S304000

Reexamination Certificate

active

07859140

ABSTRACT:
The permanent magnet member10for a voice coil motor (VCM) in accordance with the present invention comprises a magnet body1including a shorter periphery11, a longer periphery12located at a position separated from the shorter periphery11by a predetermined distance, and a pair of side peripheries13, 14connecting the shorter periphery11and longer periphery12to each other, the magnet body having a fan-shaped planar form; and a corrosion-resistant film (Ni plating film2) applied to a surface of the magnet body. The permanent magnet member10has a thickness whose maximum and minimum values yield a difference of 10 to 150 μm therebetween.

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patent: A-05-284716 (1993-10-01), None
patent: A-11-140700 (1999-05-01), None
patent: A-2002-158105 (2002-05-01), None

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