Patent ID: 7290273

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 first side of the disc is exposed inside the disc window; 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 a shutter, provided on the bottom of the disc storage portion, for exposing or covering the head opening; a rotational member, which is provided over the shutter inside the disc storage portion and which is interlocked with the shutter in such a manner as to open or close the shutter when the rotational member rotates inside the disc storage portion; and a disc holder for holding the disc thereon so as not to contact with a signal recording area on the second side of the disc while the shutter is closed.