Head access door, opening mechanism and method of sealing

Details Head access door, opening mechanism and method of sealing Head access door, opening mechanism and method of sealing

1981-03-30

1983-08-16

Kilgore, Robert M.

Dynamic magnetic information storage or retrieval

Record medium

In container

242199, 360105, G11B 2302, G11B 1532, G03B 104, G01D 1524

Patent

active

043994806

ABSTRACT:
A head access door mechanism for a cartridge containing a magnetic disc is described. The mechanism employs a bellcrank, located inside the cartridge, to which the door for the head access opening is coupled. The door slides in grooves located along the top and bottom of the side of the cartridge. The bellcrank is spring-loaded and forces the door closed and inward against a seal located around the head access opening. An interfering lip located along the inside of the groove slightly beyond the end of the door when the door is in the closed position interferes with the door so that it cannot be opened by a force applied directly to the door at the head access opening which would tend to slide the door within the groove. When inserted into a disc-drive assembly, a pin in the disc-drive assembly exerts a force on the second arm of the bellcrank to overcome the spring-loading. This causes the door the move away from the sealing surface surrounding the head access opening and outward past the interfering lip, permitting the door to slide open.

REFERENCES:
patent: 3759465 (1973-09-01), Janssen
patent: 4021006 (1977-05-01), Morimoto
patent: 4045821 (1977-08-01), Fujikura
patent: 4093149 (1978-06-01), Shroff
patent: 4173319 (1979-11-01), Umeda
patent: 4235395 (1980-11-01), Wardenaar
patent: 4315289 (1982-02-01), Holecek

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