Patent ID: 7540007

Claim:
A disk cartridge comprising: a disk; a cartridge body including an accommodating portion in which said disk is rotatably accommodated, said cartridge body having a recording and/or reproducing window for exposing a part of said disk; a shutter mounted on said cartridge body so as to be movable between a closed position where said window is closed by said shutter and an open position where said window is opened by sliding said shutter; a shutter locking member adapted to engage a locking portion of said cartridge body when said shutter is in said closed position, thereby limiting the movement of said shutter in the direction of opening said window; a biasing member provided on and integrated with said shutter, the biasing member configured to bias said shutter locking member in the direction of engaging said shutter locking member with said locking portion of said cartridge body; and a deformation preventing member provided in said cartridge body at a position between said biasing member and the accommodating portion, to prevent the deformation of said biasing member in a direction inward of said cartridge body.