Disk drive apparatus

Details Disk drive apparatus Disk drive apparatus

1992-07-28

1994-03-22

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360106, G11B 702

Patent

active

052969819

ABSTRACT:
A disk drive apparatus includes a magnetic disk, a spindle motor for rotating the magnetic disk, a magnetic head for writing data on and/or reading out data from the magnetic disk, a support arm for supporting the magnetic head, and a voice coil motor for pivoting the support arm. The spindle motor has a hub on which the magnetic disk is mounted, a rotor magnet mounted on the hub, and a stator disposed opposite to the rotor magnet. The stator includes a stator core around which an armature coil is wound. Teeth portions of the stator core are disposed substantially equiangularly in a circumferential direction while at least part of a plurality of coil winding portions are disposed non-uniformly in the circumferential direction, whereby the armature coils wound around the plurality of coil winding portions are retracted from a path in which the support arm is moved.

REFERENCES:
patent: 4359763 (1982-11-01), Hoffman
patent: 4620301 (1986-10-01), Koide
patent: 4686592 (1987-08-01), Carroll et al.
patent: 4864443 (1989-09-01), Peterson
patent: 4881140 (1989-11-01), Ghose et al.
patent: 5025335 (1991-06-01), Stefansky

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