Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1998-07-27
2000-10-24
Miller, Brian E.
Dynamic magnetic information storage or retrieval
Record medium
In container
2423432, G11B 23087
Patent
active
061376531
ABSTRACT:
When a guide wall formed in the lower casing of a tape cassette housing for guiding a brake release member is extended upward into the upper casing, the corresponding part of the upper casing must be cut off to provide a recess. The recess, located in the central part of the upper casing, reduces the structural strength of the upper casing. Also there are problems of deformation of the cassette wall parts subject to the urging of the spring member and development of a gap between the mating edges of the upper and lower casings during storage at elevated temperature. The present invention is directed to the solution of the problems.
In a tape cassette which includes a housing comprised of upper and lower casings, a pair of tape reels turnably held in the housing, and a brake mechanism comprising reel brake members and a brake release member all of which are located in the front part of the housing and between the pair of tape reels, in an arrangement such that, when the cassette is not in use, the brake members are urged by a spring member in directions where they are in mesh with serrated flange peripheries of the reels and, when the cassette is used, the release member is forced upward against the spring force by a brake release pin and the brake members cooperatively swing out of mesh with the serrated flange peripheries of the reels, setting the tape reels free to turn; a guide wall for guiding the release member for upward and downward movement is formed in one piece with the lower casing, with the upper part of the guide wall being overlapped with a corresponding part of the upper casing. A solid joint part for securing the upper and lower casings together is provided in the vicinity of the region where the release lever moves upward and downward along the front wall.
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patent: 5576917 (1996-11-01), Shimokuni
Hashizume Kenji
Kaneda Hiroshi
Momoi Akio
Okamura Masatoshi
Miller Brian E.
TDK Corporation
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