Patent ID: 6700741
Filing Date: 2004-03-02
Classification: G11B

Abstract:
A disk cartridge comprising:a cartridge housing in which a disk compartment is formed between an upper shell and a middle shell or between said middle shell and a lower shell by overlapping said upper shell, said middle shell and said lower shell and in which said middle shell is rotatably supported by said upper shell and said lower shell; a disk shaped recording medium stored within said disk compartment so as to become freely rotatable; a pair of shutter members attached to said middle shell in such a manner that they can be moved in a flat surface direction on the same plane; a shutter opening and closing mechanism for opening and closing a portion to be opened by moving said pair of shutter members based on the rotation of said middle shell; and wherein said pair of shutter members are comprised of a combination of two substantially semicircular same plate materials and said shutter members are symmetrically disposed on one surface side of said middle shell across said portion to be opened.