Dynamic information storage or retrieval – Dynamic mechanism subsystem – Specific detail of storage medium support or motion production
Patent
1981-08-13
1983-06-28
Stephan, Steven L.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Specific detail of storage medium support or motion production
369 77, G11B 1900, G11B 1100, G11B 1700, H04N 576
Patent
active
043909795
ABSTRACT:
A rotary recording medium reproducing apparatus comprises a turntable onto which a rotary recording medium is placed, a motor for rotating the turntable, a reproducing transducer for reproducing a recorded signal from the rotary recording medium placed onto the turntable, and a clamping mechanism for clamping the rotary recording medium on the turntable. The clamping device comprises a support structure capable of unitarily rotating with the turntable and moving up and down independently with the turntable, for supporting a part in the vicinity of a center hole of the rotary recording medium when the support structure is in a raised position, an elevating mechanism for moving the support structure upwards and downwards, clamping fingers provided on the support structure for clamping the rotary recording medium on the turntable at a part in the vicinity of the center hole of the rotary recording medium when the clamping fingers are operated, where the clamping fingers are supported at positions deviated from their centers of gravity so as to rotate towards a clamping releasing direction, and a receiving and stopping member for rotating the clamping fingers towards a clamping direction opposite to the clamping releasing direction by receiving and stopping parts of the clamping fingers when the support structure is lowered. The support structure is separated from both the elevating mechanism and the receiving and stopping member when the support structure is lowered. Further, the clamping fingers are applied with a rotational force in the clamping direction due to the weight of the support structure, to press the part of the rotary recording medium in the vicinity of the center hole thereof against the turntable.
REFERENCES:
patent: 3871663 (1975-03-01), Stave
patent: 4332025 (1982-05-01), Thurston
Kishi Toru
Saito Takashi
Bernat Louis
Stephan Steven L.
Victor Company of Japan Ltd.
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