Patent ID: 6021029
Filing Date: 2000-02-01
Classification: G11B

Abstract:
A removable disc cartridge comprising a case including a top shell and a bottom shell which contains rotatable a disc, said removable disk cartridge being insertable into a disk drive and havinga curved portion formed on one side;a guide groove formed on at least one other side;an opening formed on a portion of said curved portion;at least three supports for supporting the center core of the disk provided on the inside surface of said bottom shell;a shutter for opening and closing said opening, said curved portion being asymmetrical in the left and right directions with respect to a center line along the direction of insertion into the disk drive, wherein said shutter comprises a flat plate section and a circular arc shutter member formed in the direction perpendicular to the end of the flat plate section and wherein said flat plate section is formed of metal, and said shutter member is formed of plastic; andan arm which is disposed in the guide groove for opening and closing the shutter.