Disk cartridge

Details Disk cartridge Disk cartridge

1995-09-12

1998-12-15

Cao, Allen T.

Dynamic information storage or retrieval

Storage medium structure

Adjuncts or adapters

360133, G11B 370, G11B 2303

Patent

active

058503846

ABSTRACT:
A disk cartridge including a housing which rotatably accommodates therein a disk, such as a magneto-optic disk, which has a main recording surface and a protective surface. The housing is formed of upper and lower halves with the upper half having a first opening capable of exposing the protective layer to a magnetic-field application head of the disk unit and the lower half having a second opening capable of exposing the main recording surface to an objective lens assembly of the disk unit when the disk cartridge is inserted into the disk unit. The first and second openings are provided at a cartridge insertion end of the cartridge and are each of a defined width measured in the lateral direction of the cartridge and are designed such that the defined width of one of the first and second openings is smaller than the defined width of the other of the first and second openings. In this disk cartridge, the upper and lower halves respectively include first and second bridge portions provided at the cartridge insertion end with the first and second bridge portions interconnecting respectively first and second pairs of opposed side edges of the first and second openings. In order to enhance the rigidity of both of the bridge portions, the thickness of one of the first and second bridge portions is greater than the thickness of the other of the first and second bridge portions.

REFERENCES:
patent: 5040167 (1991-08-01), Tanaka et al.
patent: 5043974 (1991-08-01), Nakagawa
patent: 5045959 (1991-09-01), Ishimatsu
patent: 5051857 (1991-09-01), Akiyama
patent: 5077625 (1991-12-01), Shiba et al.
patent: 5084861 (1992-01-01), Takahashi
patent: 5237560 (1993-08-01), Tani et al.
patent: 5381293 (1995-01-01), Akiyama et al.

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