Patent ID: 7530518

Claim:
A recording tape cartridge comprising: a reel having a hub on which a recording tape is wound, and flanges holding the recording tape wound on the hub, at least one of the flanges being welded to the hub; a case accommodating the reel singly and rotatably; and a locking member configured to be able to pivot within a plane which is orthogonal to a rotation axis direction of the reel around a position which is different from a rotational center of the reel, the locking member being set at a locking position, at which the locking member is interposed on an extended line of the hub in the rotation axis direction at a side where the flange is welded and the locking member impedes movement of the reel in the rotation axis direction, and an unlocking position, at which the locking member is withdrawn from the extended line of the hub in the rotation axis direction at the side where the flange is welded and the locking member permits movement of the reel in the rotation axis direction.