Patent ID: 7121494

Claim:
A magnetic tape cartridge comprising a cartridge casing formed by upper and lower casing halves connected together, and a single reel around which a magnetic tape with a leader pin fixed to the leading end thereof is wound and which is contained in the cartridge casing for rotation, the leader pin being removably held in a tape draw-out opening with an axial direction of the leader pin directed in a vertical direction under urging force of a first urging means acting on an upper end portion and a lower end portion of the leader pin sideways with the upper end portion and the lower end portion received in recesses respectively formed in the upper and lower casing halves, wherein the improvement comprises a second urging means for urging downward the leader pin is provided on the upper casing half of the cartridge casing, and the maximum load point on the leader pin by the first urging means and that by the second urging means are displaced from each other in the direction of insertion of the leader pin.