The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 1997
Filed:
Jul. 14, 1995
Osamu Taguchi, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a reel lock mechanism for a tape cassette in which a ratchet opening spring can be easily attached to reel lock ratchets, the ratchet opening spring (14) includes two coil portions (14a, 14b) mounted on shaft portions (20d, 20d) of a pair of reel lock ratchets (12, 13) and a pair of ratchet opening arms (14d, 14e) for spring-biasing ratchet portions (20c, 20c) toward ratchet wheels (8, 8) on the tape reels (2a, 3a). The pair of reel lock ratchets (12, 13) include a ratchet-side stopper (20f) and a reel lock body (11) includes a body-side stopper (11e) which can be engaged with the ratchet-side stopper (20f). When the ratchet-side stopper (20f) and the body-side stopper (11e) are engaged with each other, the ratchet opening spring (14) generates a spring force to bias the pair of reel lock ratchets (12, 13) under such spring force.