Rotary actuator for disk drive

Details Rotary actuator for disk drive Rotary actuator for disk drive

1990-11-19

1992-06-02

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

310 36, G11B 2108

Patent

active

051192535

ABSTRACT:
Described herein is a moving coil type rotary actuator for a disk drive, which essentially includes: a rotary arm supporting transducer means at one end thereof, and rotatably supported for rotation about an axis; a first york arranged in a first plane perpendicular to the rotational axis; a second york arranged in a second plane in a spaced relation parallel with the first york and perpendicular to the rotational axis; a first permanent magnet mounted on the surface of the first york to produce a first magnetic field between the second york and itself; a second permanent magnet mounted on one surface of the second york in staggered relation with the first magnet on the first york to produce a second magnetic field between the first york and itself; and a moving coil supported by the rotary arm at the other end thereof and having first and second coil portions positioned within the first and second magnetic fields, respectively.

REFERENCES:
patent: 4835643 (1989-05-01), Schulze

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