Apparatus for centering the magnetic disc in a magnetic disc dri

Details Apparatus for centering the magnetic disc in a magnetic disc dri Apparatus for centering the magnetic disc in a magnetic disc dri

1989-09-08

1992-06-09

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9912, 360 9904, 360 9905, G11B 17028

Patent

active

051212722

ABSTRACT:
A disc drive for a disc including a disc rotating apparatus comprising a rotating shaft for being received within a first aperture of the disc. A spindle is affixed to the shaft. The spindle has a surface disposed in a plane perpendicular to the shaft, for supporting the disc. A disc driving means includes a position controlling member received in a second aperture of the disc, a rigid member for controlling the position of the position controlling member, and a biasing member for urging the rigid member in at least one direction so that the position controlling member engages the disc. A centering force to center the disc on the disc rotating apparatus is produced due to the action of the position controlling member on the disc. The biasing member may be configured so as to act upon the rigid member in an additional direction to produce an additional centering force component when the position controlling member engages the disc, thus urging sides of the first aperture of the disc against the rotating shaft. The rigid member has a first portion pivotally attached to the disc rotating means at a point removed from the rotating shaft and a second portion for supporting the position controlling member. The second portion of the position controlling member is configured to support the position controlling member so that it is angled forward with respect to the direction of rotation of the disc, to aid in holding the disc firmly on the spindle.

REFERENCES:
patent: 4152740 (1979-05-01), Stratton
patent: 4445155 (1984-04-01), Takahashi et al.
patent: 4445157 (1984-04-01), Takahashi
patent: 4517617 (1985-05-01), Tsusi et al.
patent: 4613921 (1986-09-01), Holmes
patent: 4672486 (1987-06-01), Bettini
patent: 4697216 (1987-09-01), Tsukahara
patent: 4825314 (1989-04-01), Maekawa et al.
patent: 4903155 (1990-02-01), Maekawa et al.

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