Hard disk drive device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 29, 2003
Grant Date -
Mar 6, 2003
app pub date -
Sep 23, 2002
filing date -
Feb 19, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The object of the present invention is to provide a hard disk drive device having a bearing device of larger size and sufficient strength, improved impact resistance, high accuracy of rotation, and high reliability. In accordance with the present invention, a hard disk drive device comprises a motor including: a rotor or hub having around an outer periphery thereof a downwardly depending flange, wherein the hub is journalled rotatably on a base by way of a bearing; the hub provided with a magnet on the inner peripheral surface of the downwardly depending flange; a stator provided on the base so as to be opposed face to face with the magnet, the stator including coils; and a magnetic disk or disks having a central aperture to be fitted around the outer peripheral surface of flange provided around the hub of the motor, the magnetic disk adapted to be rotated by the motor; wherein the inner diameter of the downwardly depending flange of the hub of the motor is enlarged, so that the outer and inner diameters of the magnet confined within the downwardly depending flange, and the outer and inner diameters of the stator are also enlarged to allow the outer diameter of the bearing device to be enlarged.
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