Patent ID: 7051349

Claim:
A disk cartridge comprising: a cartridge housing in which a disk compartment is formed by an upper shell and a rotary member or between said rotary member and a lower shell by combining said upper shell, said rotary member and said lower shell, said rotary member is supported by at least one of said upper shell and said lower shell so as to become freely rotatable and in which an opening portion is provided on at least one of said upper shell and said lower shell or on at least one of said upper shell and said lower shell and said rotary member; a shutter member provided on said cartridge housing so as to become movable between the opening position at which it opens said opening portion and the closing position at which it closes said opening portion in response to rotation of said rotary member; and shutter fixing means for holding said shutter member in a closed state at said closing position, a disk cartridge characterized in that said shutter member is held in the opened state at said opening position by said shutter fixing means.