Rotary actuator in disk drive

Details Rotary actuator in disk drive Rotary actuator in disk drive

1997-04-14

1998-06-16

Cao, Allen

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

057680639

ABSTRACT:
Disclosed herein is a rotary actuator having a retractor mechanism which can retract magnetic heads to a CSS zone of magnetic disks only by a mechanical bias force in stopping a magnetic disk drive at any cylinder position of the heads. The rotary actuator includes an actuator arm assembly rotatably mounted on a base of the magnetic disk drive, an FPC mounted on one side surface of the actuator arm assembly, and a magnetic circuit constituting a voice coil motor by combination with a moving coil supported to the actuator arm assembly. A retractor plate is fixed to the actuator arm assembly at a position opposite to a mounting position of the FPC with respect to the center of rotation of the actuator arm assembly. The retractor plate functions to retract the magnetic heads to the CSS zone of the magnetic disks by magnetic reaction with a magnetic flux in the magnetic circuit.

REFERENCES:
patent: 5113099 (1992-05-01), Wong et al.
patent: 5117318 (1992-05-01), Immler et al.
patent: 5202804 (1993-04-01), Takekado
patent: 5608592 (1997-03-01), Mizoshita et al.

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