Shutter plate control device in a disc playback device

Details Shutter plate control device in a disc playback device Shutter plate control device in a disc playback device

1985-09-30

1987-02-24

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Adjuncts or adapters

206444, 360 97, 360133, 369 772, G11B 1724, G11B 2304

Patent

active

046462856

ABSTRACT:
A shutter plate control device in a disc playback device energizes a shutter plate in a disc magazine case with opening and closing members provided in a main body of the disc playback device. The opening member engages with a shutter lever provided on the shutter plate in loading of the disc magazine case to move the shutter plate in a direction for opening an aperture formed in the disc magazine case for exposing the disc to a pickup head to enable the pickup head to read date recorded on the disc. The closing member engages with the shutter lever in loading of the disc magazine case to be displaced by the shutter lever and thereby permit the shutter lever to pass by without moving the shutter plate while it engages with the shutter lever in ejecting of the disc magazine case to move the shutter plate in a direction for closing the aperture.

REFERENCES:
patent: 4399480 (1983-08-01), Edwards
patent: 4410973 (1983-10-01), Saito et al.
patent: 4471397 (1984-09-01), Cloutier
patent: 4525758 (1985-06-01), Nakagawa et al.
patent: 4573572 (1986-03-01), Kato et al.
Shutter Mechanism for Flexible Disk Cartridge, IBM Technical Disclosure Bulletin, vol. 27, No. 1A, 6/84, pp. 40-41.

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