Patent ID: 7506348

Claim:
A disk cartridge comprising: a disk; a cartridge body having the disk encased rotatably therein and having formed therein a write and/or read opening through which a part of the disk, ranging from the inner to outer radius, is exposed to outside; a shutter member including a shutter that covers and uncovers the write and/or read opening and a movement guide piece opposite to one side of the cartridge body, and installed to the cartridge body to be movable between a position to cover the write and/or read opening and a position to uncover the write and/or read opening; a pressing portion installed to the shutter member to face a window formed in the movement guide piece opposite to the one side of the cartridge body; a coupling arm extending from one side of the shutter member; an elastic moving piece installed to the shutter member to force the pressing portion to outside of the cartridge body; said elastic moving piece extending along the coupling arm, the elastic moving piece being located in a plane offset from a plane of the coupling arm, and a shutter movement limiter provided on the shutter member and that is engaged on a movement limiter provided on the cartridge body, when the shutter member is in a position to cover the write and/or read opening, to limit the shutter member from moving in a direction of uncovering the write and/or read opening, and moves in a direction in which it is disengaged from the movement limiter when the pressing portion is pressed inwardly of the cartridge body.