Disk storage device with electric motor with axially deep flange
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United States of America Patent
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-
Sep 7, 1999
Issued Date -
N/A
app pub date -
Aug 20, 1997
filing date -
Jun 9, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A compact disk storage device having outer-rotor electric motor for directly driving a disk for recording and reproducing information has an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and the ball bearings of the hub are axially displaced. The hub includes a cover disk for sealing an extremity of the ball bearings and an inverted cup shape rotor providing magnetic shielding. The flange includes a mounting rim substantially aligned with the back surface of the cup-shape rotor. The facing cup-like and tank-form shapes readily enable labyrinth seals and substantial and abutting axial extents along the axis of the stationary shaft.
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