Patent ID: 6892974
Filing Date: 2005-05-17
Classification: G11B

Abstract:
1. A recording tape cartridge comprising: a substantially rectangular accommodating case for rotatably accommodating a single reel on which a recording tape is wound, the accommodating case having an opening which is formed by cutting off a corner portion of the accommodating case on a side thereof that is inserted into a drive device, and which is used to pull out a leader member attached to an end portion of the recording tape; a shielding member that slidably moves to open and close the opening; a guide wall portion which is provided parallel to an inner surface of the accommodating case and which guides the movement of the shielding member; and a friction-reducing device which is provided so as to protrude from the shielding member, which abuts a guide surface of the guide wall portion, and which reduces friction between the shielding member and the guide surface, wherein the shielding member slidably moves in an arc-shaped locus, and wherein a portion of the shielding member other than an opening-blocking portion thereof is formed lower in height than the opening-blocking portion.