Patent ID: 7216357

Claim:
A disc cartridge comprising: a cartridge body including a disc storage portion, a chucking opening and a head opening, wherein the disc storage portion has a disc window and a bottom and stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion and that the first side of the disc is exposed; the chucking opening is formed on the bottom of the disc storage portion so as to get the disc chucked externally; and the head opening is also formed on the bottom of the disc storage portion so as to allow a head, which reads and/or writes a signal from/on the second side of the disc, to access the second side of the disc; at least one shutter which is supported to, and movable with respect to, the cartridge body so as to expose or cover at least the head opening; and a disc holding member for holding and releasing the disc onto/from the cartridge body, wherein the disc holding member holds the disc by pressing at least an outer periphery and its surrounding portion of the second side of the disc toward the bottom of the disc storage portion.