Disk cartridge with shutter biasing device

Details Disk cartridge with shutter biasing device Disk cartridge with shutter biasing device

1988-02-12

1989-07-25

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

048519480

ABSTRACT:
A disk cartridge comprises a cartridge casing having a head entry aperture, a disk recording medium rotatably accommodated in the cartridge casing, a shutter for opening/closing the head entry aperture, and a spring member for resiliently biasing the shutter in the closing direction. The spring member includes a proximal end portion engaged with the cartridge casing, a resilient end portion engaged with the shutter, and an intermediate engaging portion provided between the proximal end portion and the resilient end portion, a displacement-preventing portion is provided in an area where the intermediate engaging portion is passed upon an opening/closing operation of the shutter, and the intermediate engaging portion is adapted to be brought into contact with the displacement-preventing portion, thereby canceling a force of the spring member to spring out or fall in, and enabling to enhance reliability.

REFERENCES:
patent: 4589105 (1986-05-01), Nemoto

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