Patent ID: 6826767
Filing Date: 2004-11-30
Classification: G11B

Abstract:
A cartridge having a shutter (61) movable forward and rearward for exposing or alternatively enclosing a disk (60) contained in a shell (9), the shell (9) being insertable into a device provided with a tooth (31) for opening the shutter (61) and a spring piece (37) fittable to the shutter (61) and positioned at a level different from that of the tooth (31), the tooth (31) having an inner end positioned inwardly of the spring piece (37), the shell (9) having a slit (5) formed in a side face thereof in the vicinity of the shutter (61) for permitting the tooth (31) to advance thereinto, the cartridge being characterized in that:the shell (9) has a corner in the vicinity of the slit (5) and providing a contact face (90), the slit (5) being provided at a front end portion thereof with a guide groove (50) positioned in the contact face (90) and enlarging toward the front, the contact face (90) being in the form of a circular arc or slope and so shaped that when the shell (9) is inserted into the device, the contact face (90) comes into contact with the inner end of the tooth (31) at a location B which is positioned forwardly of a position A where the contact face (90) comes into contact with the spring piece (37), a horizontal groove (51) of the slit (5) having a lower end portion extending to the vicinity of the location A, the guide groove (50) enlarging toward the front and being provided forwardly of the vicinity of the location A.