Disc for recording information signals and disc chucking device

Details Disc for recording information signals and disc chucking device Disc for recording information signals and disc chucking device

G - Physics

11

B

G11B 7/24 (2006.01) G11B 7/0037 (2006.01) G11B 11/105 (2006.01) G11B 17/022 (2006.01) G11B 17/028 (2006.01) G11B 23/00 (2006.01)

Patent

CA 2060923

A recording disc for information signals includes a disc substrate carrying a signal recording section on at least its one surface, a positioning reference plane at a central region of one of surfaces of the disc substrate, and an upright wall portion for integrally connecting the reference plane to the signal recording section. A chucking device for chucking the recording disc to a disc rotating unit includes a disc table having a disc setting portion and integrally mounted on a rotating shaft of a spindle motor, a centering member reciprocably mounted on the disc table and abutted against an inner surface of the reference plane of the recording disc for centering the recording disc, and a magnet mounted at the foremost part of the disc setting unit inwardly of the centering member and adapted for attracting a magnetic plate provided on the recording disc set on the disc table.

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