Flexible disk drive having a position detection unit for detecti

Details Flexible disk drive having a position detection unit for detecti Flexible disk drive having a position detection unit for detecti

1997-12-18

2000-01-25

Miller, Brian E.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 7811, G11B 555, G11B 5596

Patent

active

06018440&

ABSTRACT:
In a position detection unit having a scale and a photointerrupter and using in a magnetic disk drive, the scale has a plurality of slits which are equally spaced along a direction in parallel with a predetermined radial direction and a clipped section which is clipped out of the scale. The photointerrupter has a first light-emitting section and a first light-receiving section which are opposed to each other with the slits put therebetween. The photointerrupter has a second light-emitting section and a second light-receiving section which are opposed to each other at a position corresponding to the clipped section. The scale is mounted on a carriage at a side opposed to a main surface of a main frame. The carriage supports a magnetic head of the magnetic disk drive. And the photointerrupter is mounted on a substrate located close to the main frame.

REFERENCES:
patent: 4992893 (1991-02-01), Kanai et al.
patent: 5177648 (1993-01-01), Inoue
patent: 5270886 (1993-12-01), Nigam
patent: 5305159 (1994-04-01), Sakai et al.
patent: 5587852 (1996-12-01), Yoshiura et al.

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