Patent ID: 7175124
Filing Date: 2007-02-13
Classification: G11B

Abstract:
1. A recording tape cartridge comprising: a case at which a ceiling plate and a floor plate are connected by a peripheral wall; a reel around which a recording tape is wound, the reel accommodated within the case so as to be able to approach and move away from the floor plate; an engaging portion provided at the reel, and facing the ceiling plate; a rotation locking member provided so as to be unable to rotate with respect to the case and so as to be able to approach and move away from the ceiling plate, and when the recording tape cartridge is not in use, the rotation locking member engages with the engaging portion of the reel which is abutting the floor plate and impedes rotation of the reel, and the rotation locking member is operated by a drive device and moves away from the engaging portion and allows the reel to rotate and to move away from the floor plate; and a spacer member provided between the ceiling plate and the rotation locking member, and when the recording tape cartridge is not in use, the spacer member fills-in a gap between the ceiling plate and the rotation locking member, and before the rotation locking member is operated by the drive device, the spacer member is operated by the drive device and is pulled-out from the gap.