Disk apparatus and actuator holding method

Details Disk apparatus and actuator holding method Disk apparatus and actuator holding method

2006-05-09

2006-05-09

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

07042671

ABSTRACT:
A magnetic disk apparatus comprises an actuator for swinging a magnetic head substantially in the radial direction of a magnetic disk. First and second magnetic bodies, which individually constitute magnetic circuits between the magnetic bodies and a permanent magnet of a VCM, are fixed to the rear end of the actuator. The first magnetic body is pulled by leakage flux from the permanent magnet to return the actuator to a parking position when the actuator is deviated from the parking position. The second magnetic body is caused by the leakage flux to act so as to return the actuator at least to a position in a range such that a tensile force acts on the first magnetic body when the actuator is moved overpassing that range.

REFERENCES:
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patent: 5768063 (1998-06-01), Suwa et al.
patent: 6252744 (2001-06-01), Kelemen
patent: 2002/0060886 (2002-05-01), Bae et al.
patent: 7-176152 (1995-07-01), None
patent: 11-096699 (1999-04-01), None
Austrian Search Report and Written Opinion dated Jul. 30, 2004, for Austrian Patent Application No. 200307638-7.
Japanese Office Action dated Mar. 22, 2005 for Appln. No. 2002-372378.

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