Patent ID: 6909580

Claim:
A disk cartridge capable of rotatably accommodating therein a disk so as to be loaded into a disk driving apparatus, the disk cartridge comprising: a body case ( 11 ) capable of rotatably accommodating the disk therein; a window ( 14 ) opened in the body case so as to expose that surface of the accommodated disk which is to be or has been recorded with a piece of information; a shutter ( 26 ) provided in the body case in a manner capable of opening/closing the window; a rotating body ( 30 ) rotatably provided within the body case and being contacted with and rotated by the disk driving apparatus, in a state where the disk cartridge is loaded in the disk driving apparatus or in the course of loading movement of the disk cartridge into the disk driving apparatus; and shutter driver provided within the body case and for moving the shutter by the rotation of the rotating body to thereby open/close the window, wherein the rotating body comprises a gear, and the rotating body is disengageably contacted with and rotated by a rotating structure provided in the disk driving apparatus.