Patent ID: 6779191
Filing Date: 2004-08-17
Classification: G11B

Abstract:
A data storage disk rotating apparatus, comprising:a drive motor having a rotary shaft; a turntable firmly fixed on said rotary shaft; a disk holding member for holding a disk mounted on said turntable cooperative with said turntable; a first magnetic member provided in one of said turntable and said disk holding member; a second magnetic member provided in the other of said turntable and said disk holding member and to be attracted by said first magnetic member during a use; at least one annular groove formed on an underside surface of said turntable and open to said drive motor; a plurality of balance correcting balls accommodated in said annular groove; and fall preventative means for operably contacting and preventing said balls in said annular groove from falling out of said at least one annular groove during said use and away from said underside surface of said turntable, whereby during an unbalanced-state of use or when deviation from a center of gravity occurs at least one of said plurality of balance correcting balls is moved to a position opposite said center of gravity by a centrifugal force and thereby reduces said unbalanced state.