Patent ID: 7345846
Filing Date: 2008-03-18
Classification: G11B

Abstract:
1. A tape cartridge comprising: a reel hub unit, for winding a tape-shaped recording medium on its periphery, rotatably accommodated in said tape cartridge; and a leader member for holding and fixing a leading edge of the tape-shaped recording medium, wherein said leader member includes a pin member having a pair of collar portions between which the tape-shaped recording medium is positioned, and a clamp member fitted in between said collar portions from through an opening so formed in a longitudinal direction of a cylindrical body as to extend to end surfaces on both sides of said cylindrical body, and clamping the tape-shaped recording medium between said pin member and said clamp member itself, and chamfered portions are provided at edge portions of the opening of said clamp member, said chamfered portions each comprising a planar surface completely enclosed by three edges, a first of said three edges being formed between the planar surface of the chamfered portion and an end surface of said cylindrical body facing one of said collar portions, the second of said three edges being formed between the planar surface of the chamfered portion and a side surface of said cylindrical body extending in the longitudinal direction of said opening, and the third of said three edges being formed between the planar surface of the chamfered portion and an outer peripheral surface of said cylindrical body.