Disc clamping mechanism
AssigneeTokyo Parts Industrial Co., Ltd.
InventorMasahiro NISHIDATE
Life of this patent
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Abstract
A cylindrical member is fixed to an upper portion of a rotary shaft and a clamper presses an optical disc in contact with the top of a turntable. The structure is such that a first bottom face of the cylindrical member that faces a clamping magnet in the axial direction is positioned below an opposite face of the clamper that faces the clamping magnet in the axial direction.
Claims9
A disc clamping mechanism comprising with a spindle motor having a turntable on which a disc is placed and which rotates united with a rotary shaft, a clamper which is positioned on an upper portion of said spindle motor, a disc guide that guides an inner edge of said disc;
- a clamping magnet which is disposed in an inner diameter of said disc guide,
- a cylindrical member which is fixed to an upper portion of said rotary shaft,
- wherein said cylindrical member has a first bottom face that faces said clamping magnet in the axial direction with a first gap therebetween, and
- said first bottom face, in a state in which said clamper presses a disc in contact with the top of said turntable, is positioned below a facing part of said clamper which faces said clamping magnet in the axial direction.
Dependencies are inferred from the claim text.