Reel lock mechanism of tape cassette, and tape cassette

Details Reel lock mechanism of tape cassette, and tape cassette Reel lock mechanism of tape cassette, and tape cassette

2005-08-30

2005-08-30

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Record medium

In container

Reexamination Certificate

active

06937437

ABSTRACT:
Each lock portion (15) has a front portion (23) including an anchoring pawl (24) and a back portion (25) extending in a direction opposite to the front portion. Therefore, when a slider (14) withdraws, each back portion comes into contact with the inside surface of a back wall (10) of a cassette shell (4) and each lock portion rotates in an unlocking direction.A bottom surface (109) defining each recess between engaging teeth (107) has a central portion which protrudes in a chevron shape. A corner of each protrusion has tapered surfaces (110′) and (110″). An anchoring pawl of each lock portion has a flat surface that comes into contact with one inclined surface (109′) of a chevron-shaped portion of any one of the recesses and one tapered surface (110′) of a protrusion disposed behind the adjacent recess.

REFERENCES:
patent: 5255144 (1993-10-01), Iwahashi et al.
patent: 5433398 (1995-07-01), Sawada
patent: 5449124 (1995-09-01), Fujii
patent: 5506739 (1996-04-01), Iwahashi
patent: 5852534 (1998-12-01), Ozue et al.
patent: 6515828 (2003-02-01), Ashikawa
patent: 4-265587 (1992-09-01), None
patent: 9-161439 (1997-06-01), None
patent: 2001-23339 (2001-01-01), None

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