Patent ID: 6282059
Filing Date: 2001-08-28
Classification: G11B

Abstract:
A cartridge which comprises a case consisting of upper and lower shells joined and containing a recording medium therein, said case having a slot formed to expose the recording medium partly, a shutter which rests astride on one edge portion of the case and is slidable between an open position where the shutter opens the slot and a closed position where the shutter closes the slot, and a locking member which keeps the shutter in the closed position, said case having a recess formed in a portion of a peripheral edge of said case adjacent and external to the shutter, defined by a cutout across the entire thickness of the case, to receive an unlocking member from a recording-reproducing unit, said locking member having an exposed portion exposed partly in the recess for access of the unlocking member, so that when the unlocking member pushes the locking member on the exposed portion, a hooked head of the locking member is disengaged from an engaging projection formed inside an end face of the shutter.