Magnetic disk cartridge with shutter spring engaging portion and

Details Magnetic disk cartridge with shutter spring engaging portion and Magnetic disk cartridge with shutter spring engaging portion and

1996-08-26

1998-03-03

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

057242178

ABSTRACT:
A magnetic disk cartridge has a magnetic head access opening formed in one side surface of a flat cassette shell having a top surface, a bottom surface and side surfaces. A shutter member provided to be slidable on the cassette shell for opening and closing the magnetic head access opening is constituted as a sectionally U-shaped member formed by an upper wing, a shutter section having a window and a lower wing that are interconnected and extend respectively along the top surface, one side surface and the bottom surface. A shutter closing spring is provided for biasing the shutter member in the closing direction. The shutter section of the shutter member is provided at a lateral end portion thereof with a spring engaging portion for engaging one end of the shutter closing spring and between the spring engaging portion and the shutter window with at least one guide projection projecting toward the one side surface. The structure eliminates the problem of powder being produced owing to abrasion of the cassette shell because of unbalanced biasing of the shutter member by the shutter closing spring and ensures smooth sliding of the shutter member at all times.

REFERENCES:
patent: 4714973 (1987-12-01), Kato
patent: 4717981 (1988-01-01), Nigan

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