Magnetic tape cartridge

摘要

A magnetic tape cartridge comprising a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation, and a brake means which is movable between an operative position where it prevents rotation of the reel and a retracted position where it permits rotation of the reel, characterized in that the brake means comprises a brake member which is movable between an operative position where it engages with the reel to prevent rotation of the reel and a retracted position where it is disengaged from the reel to permit rotation of the reel, an urging means which urges the brake member toward the operative position, and a brake release member which is disposed in the cartridge casing to be rotated together with the reel and moves the brake member to the retracted position in response to chucking operation of a tape drive mechanism of a tape drive system, said urging means acting on the brake member in a position near the position where the tape drive mechanism acts on the brake release member to move the brake member to the retracted position.