Patent ID: 7802272
Filing Date: 2010-09-21
Classification: G11B

Abstract:
1. A chucking device for allowing a disc having a central opening space so as to rotate around a predetermined rotation axis, or two of such discs pasted to one another, to be attached thereto and removed therefrom, the device comprising: a loading section for loading thereon the disc; a substantially cylinder shaped centering case section for inserting through the central opening space and loading thereon the disc; and an aligning claw for making contact with the disc, elastically bending in a radial manner and aligning a center of a rotation of the disc and the rotation axis, wherein: the aligning claw comprises a retainer section for making contact with an inner surface of the central opening space of the disc so as to align the disc with the chucking device and retain the disc, the retainer section having a first upper surface; a guiding section, located axially above the retainer section, for guiding the disc to the retainer section, the guiding section having a second upper surface; and a supporter section, for supporting the guiding section and the retainer, the supporter section having a third upper surface, wherein the first upper surface is extended radially outside from the second upper surface, wherein the second upper surface is extended radially outside from the third upper surface, wherein the first upper surface and the second upper surface extend downward, wherein the first upper surface forms an acute angle relative to the second upper surface, and the second upper surface forms an acute angle relative to the third upper surface.