Mechanism for actuating a protective shutter provided on a cartr

Details Mechanism for actuating a protective shutter provided on a cartr Mechanism for actuating a protective shutter provided on a cartr

1988-12-07

1991-02-19

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360133, G11B 5012, G11B 2303

Patent

active

049949306

ABSTRACT:
A mechanism for actuating a shutter of a cartridge accommodating an optical disk so as to expose a window defined in the cartridge responsive to an insertion of the cartridge into the apparatus and so as to cover the window responsive to the withdrawal of the cartridge from the apparatus. The mechanism comprises a base provided in a body of the information recording/reproducing apparatus. The base comprises a top plate defining a space for accepting the cartridge when the cartridge is inserted into the apparatus. An arm is held in said space so as to rotate freely relative to the base in a plane generally parallel to said top plate. The arm carries a projection adapted to engage with a corresponding depression formed on a front face of the shutter located at a front side of the cartridge which enters first into the space when the cartridge is inserted. A coiled spring urges the arm in a first direction opposing the rotation of the arm when the cartridge is inserted into said space. The spring further urges the arm in a second direction towards the top plate such that the arm maintains contact with an inner surface of said top plate which faces the space.

REFERENCES:
patent: 4546397 (1985-10-01), Asami et al.
patent: 4622607 (1986-11-01), Smith, II
patent: 4688206 (1987-08-01), Nakagawa et al.
patent: 4747001 (1988-05-01), Kokubo et al.
patent: 4823214 (1989-04-01), Davis

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