Magnetic disk drive and voice coil motor

Details Magnetic disk drive and voice coil motor Magnetic disk drive and voice coil motor

2009-01-16

2011-11-22

Mai, Son (Department: 2827)

Dynamic magnetic information storage or retrieval

Head mounting

For shifting head between tracks

C360S264800

Reexamination Certificate

active

08064171

ABSTRACT:
Embodiments of the present invention help to reduce out-of-plane excitation force exerted on a coil in a voice coil motor of a magnetic disk drive, so that vibration of a magnetic head is suppressed. According to one embodiment, a voice coil motor has a flat magnet that faces a coil, and generates a magnetic field, and yokes that apply the magnetic field generated by the magnet to the coil. The magnet is provided with a magnetic flux guiding section, absorbing leakage flux from the magnet, on a most distal end of the magnet as viewed from a pivot axis. A most distal part of the coil as viewed from the pivot axis, may be situated in an outer side with respect to the most distal end of the magnet, and the magnetic flux guiding section is provided between the most distal end of the magnet and the most distal part of the coil.

REFERENCES:
patent: 6421208 (2002-07-01), Oveyssi
patent: 6529351 (2003-03-01), Oveyssi et al.
patent: 7652850 (2010-01-01), Suzuki et al.
patent: 05-122917 (1993-05-01), None

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