Cartridge containing disk and device for recording or reproducing signal on or from the disk

摘要

A cartridge has a shutter movable forward and rearward for exposing or alternatively enclosing a disk contained in a shell. The shell is inserted into a device provided with a tooth for opening the shutter and a spring piece fittable to the shutter and positioned at a level different from that of the tooth. The shell has a slit formed in a side face thereof in the vicinity of the shutter for permitting the tooth to advance thereinto. The shell has a corner in the vicinity of the slit and providing a contact face. The slit is provided at a front end portion thereof with a guide groove positioned in the contact face and enlarging toward the front. The contact face is in the form of a circular arc or slope and so shaped that the path of movement thereof intersects the inner end of the tooth at a location B which is positioned forwardly of a position A where the path of movement intersects the spring piece.