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AssigneeTDK Corporation
InventorsTakeshi Sakamoto, Tomomi Yamamoto, Tatsuhiro Iwai, Yasuyuki Nakayama
Estimating the term…
The permanent magnet member 10 for a voice coil motor (VCM) in accordance with the present invention comprises a magnet body 1 including a shorter periphery 11, a longer periphery 12 located at a position separated from the shorter periphery 11 by a predetermined distance, and a pair of side peripheries 13, 14 connecting the shorter periphery 11 and longer periphery 12 to each other, the magnet body having a fan-shaped planar form; and a corrosion-resistant film (Ni plating film 2) applied to a surface of the magnet body. The permanent magnet member 10 has a thickness whose maximum and minimum values yield a difference of 10 to 150 μm therebetween.
A permanent magnet member for a voice coil motor, the permanent magnet member being a planar permanent magnet member and comprising a magnet body and a corrosion-resistant film formed on a surface of the magnet body, the permanent magnet member having a top surface and a bottom surface opposing each other;
A voice coil motor comprising:
Dependencies are inferred from the claim text.