System for checking the opening and closing of a cassette lid

Details System for checking the opening and closing of a cassette lid System for checking the opening and closing of a cassette lid

1990-08-17

1992-08-11

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Miscellaneous

G11B 1518

Patent

active

051385120

ABSTRACT:
A cassette inspecting system for inspecting the function of a lid of a cassette which is urged toward the closed position by a lid spring inspects whether the urging force of the lid spring is between an upper limit and a lower limit. An arm is mounted on a base for rotation about an axis between its first and second end portions in a first direction and a second direction opposite to the first direction. The base is movable to move the arm together therewith substantially in the first direction, thereby causing the first end portion of the arm member to abut against the lid in the first direction and to urge the lid toward the open position. A balancer fixed to the second end portion of the arm urges the first end portion in the first direction with a force substantially equivalent to the lower limit of the urging force of the lid spring. A coil spring urges the first end portion in the first direction when the counterforce of the lid which acts on the front end portion of the arm as the base moves in the first direction overcomes the force provided by the balancer, and displaces the arm in the second direction by a predetermined angle. The sum of the urging forces of the balancer and the coil spring is substantially equivalent to the upper limit of the urging force of the lid spring. A position sensor detects the displacement of the arm in the second direction.

REFERENCES:
patent: 4899245 (1990-02-01), Kubota
patent: 4947277 (1990-08-01), Kubota
patent: 4951167 (1990-08-01), Hiramoto et al.

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