Magnetic disc drive motor having disc securely fixed to loading

Details Magnetic disc drive motor having disc securely fixed to loading Magnetic disc drive motor having disc securely fixed to loading

1993-10-12

1995-09-12

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9908, G11B 17028

Patent

active

054502616

ABSTRACT:
A magnetic disc drive motor is provided. It includes a frame, a fixed shaft mounted on the frame upper and lower ball bearings. Inner rings of the upper and lower ball bearings are mounted on the fixed shaft. A rotor is fixed to outer rings of the upper and the lower of the ball bearings. The rotor is provided with a loading surface on an inner portion of its upper surface. The motor also includes a motor member for rotating the rotor disposed between the rotor and the frame. An upper portion of the upper ball bearing projects upward from the loading surface of the rotor and is fitted in the center hole of a magnetic disc, and the inner edge portion of the magnetic disc is fixed to the loading surface of the rotor.

REFERENCES:
patent: 4737870 (1988-04-01), Okita
patent: 4965476 (1990-10-01), Lin
patent: 5128818 (1992-07-01), Koizumi et al.
patent: 5200866 (1993-04-01), Fruge et al.
patent: 5214326 (1993-05-01), Yonei
patent: 5296981 (1994-03-01), Ogawa

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