Rotary actuator for disk drive

Details Rotary actuator for disk drive Rotary actuator for disk drive

1995-10-04

1997-10-07

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360105, G11B 2112, G11B 2102

Patent

active

056754558

ABSTRACT:
A rotary actuator for a disk drive having a base includes an actuator arm assembly rotatably mounted on the base. The actuator arm assembly has one end portion for supporting a head and another end portion for supporting a moving coil. The rotary actuator further includes a magnetic circuit having a yoke fixed to the base and a main magnet fixed to the yoke. The magnetic circuit constitutes a voice coil motor by combination with the moving coil. A retract magnet is fixed to the actuator arm assembly so as to be opposed to the yoke of the magnetic circuit. When the disk drive is stopped in operation, the retract magnet magnetically reacts with the yoke to retract the head to a CSS zone of a disk and lock the actuator arm assembly at this position.

REFERENCES:
patent: 5305169 (1994-04-01), Anderson et al.
patent: 5541792 (1996-07-01), Kinoshita et al.

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