Patent ID: 6698676
Filing Date: 2004-03-02
Classification: G11B

Abstract:
A magnetic tape cartridge comprising:a cartridge case having upper and lower cases fastened together; a single reel, rotatably housed within said cartridge case, which has magnetic tape wound thereon; a leader pin, coupled with a leading end of said magnetic tape, which has upper and lower flange portions at both ends; upper and lower pin retaining spring members which elastically engage the upper and lower flange portions of said leader pin so that with an axis of said leader pin directed in a vertical direction, said leader pin is detachably retained between said upper and lower cases; said leader pin being constructed so that said leader pin is caught by a pin catching member of a recording-reproducing unit and moved out of said cartridge case and so that said leader pin is returned into said cartridge case by said pin catching member; wherein said upper and lower pin retaining members have different spring characteristics so that when said leader pin is returned into said cartridge case, one of the pin retaining members starts engaging with the flange portion of said leader pin earlier than the other.