Disc clamping device for a disc cartridge player

Details Disc clamping device for a disc cartridge player Disc clamping device for a disc cartridge player

1985-12-26

1989-01-31

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369271, 369290, G11B 2504

Patent

active

048021580

ABSTRACT:
In a disc cartridge player of a type in which a cartridge housing the disc is loaded in the player for playback of the disc, a disc clamping device for clamping the disc on a turntable of the player includes a magnetic attraction generating device which is constructed by forming at least a part of either one of a disc stabilizer provided in the disc cartridge on the turntable from a magnet and the other from a magnetic substance. The magnetic attraction generating device can also be constructed by forming at least a part of both the disc stabilizer and the turntable respectively from a magnet. The provision of the magnetic attraction generating device enables reduction of a force of a spring urging a clamper for pressing the disc stabilizer with resulting reduction of a drive force for operating the clamper in a release direction in an eject mode and, in some case, even obviates the necessity for providing the clamper itself.

REFERENCES:
patent: 1499573 (1925-02-01), Mernaga
patent: 4351047 (1982-09-01), Redlich et al.
patent: 4402405 (1983-09-01), Fullalove
patent: 4477894 (1984-10-01), Clurman
patent: 4498165 (1985-02-01), Wilkinsen
patent: 4535434 (1985-08-01), Kishi
patent: 4571718 (1986-02-01), Cahill et al.
patent: 4587647 (1986-05-01), Mak et al.
patent: 4669278 (1987-06-01), Ogusu

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