DISK CARTRIDGE

摘要

A disk cartridge does not require a plate supporter for holding a chucking plate on an upper shell. In this disk cartridge, a chucking plate (5) for chucking a disk (4) on a turntable (41) driven by a spindle motor is not supported by an upper shell (2) but placed on the middle of the disk (4) so as to be vertically movable together with the disk (4), and a peripheral cylindrical rib (6) being not in contact with the disk (4) and functioning as positioning means for limiting movement of the chucking plate (5) in the direction of its diameter while permitting the vertical movement of the chucking plate (5) is molded integral with the lower surface of the upper shell (2). <IMAGE>