Patent ID: 7677488
Filing Date: 2010-03-16
Classification: G11B

Abstract:
1. A recording tape cartridge which can be loaded at a drive device, the recording tape cartridge comprising: a case; a reel rotatably accommodated in the case, the reel including a hub formed in a tubular shape, and a recording tape being wound around an outer peripheral portion of the hub; an inward tooth gear disposed coaxially at an inner side of the hub, the inward tooth gear ordinarily rotating integrally with the reel; a locking member supported to be non-rotatable with respect to the case and disposed within the hub, the locking member being capable, by movement in a radial direction of the hub, of attaining a rotation-locking position, for locking rotation of the reel by meshing with the inward tooth gear, and a release position, for releasing said meshing and enabling rotation of the reel; an operable member disposed within the hub, which reciprocatingly moves along an axial direction of the reel in correspondence with an operation mechanism of the drive device; and a positive motion cam mechanism including a cam portion, which is disposed at either one of the locking member and the operable member and is inclined with respect to the axial direction of the reel, and a contact member, which is disposed at the other of the locking member and the operable member and slidably contacts the cam portion, the positive motion cam mechanism causing the locking member to move between the rotation-locking position and the release position in accordance with the reciprocating movement of the operable member.