Patent ID: 7227722
Filing Date: 2007-06-05
Classification: G11B

Abstract:
1. A recording tape cartridge comprising: a case body formed by joining together an upper half and a lower half; a tape reel which is accommodated in the case body and around which a recording tape is wound; a fitting shaft portion rotatably fitted onto a center rod standing upright on an inner surface of said upper half; reel lock member formed by providing radially on an outer peripheral surface of said fitting shaft portion a brake releasing arm portion and a brake arm portion having at its top end a braking claw to be engaged with an engagement tooth formed in a peripheral edge of an upper flange of said tape reel; and reel lock member urging means which is provided so as to extend between an anchoring portion standing upright on the inner surface of said upper half and said brake arm portion and which is adapted to urge said reef lock member so as to cause said braking claw to be engaged with said engagement tooth, wherein said anchoring portion comprises two rib portions connected therebetween by a bridge portion, and said reel lock member urging means is fitted to said bridge portion and said brake arm portion respectively.