Patent ID: 8209712

Claim:
A disk cartridge comprising first and second disk storage portions, each having a space to partially store a disk with at least one data storage side, wherein when closed up, the first and second disk storage portions enclose the disk entirely, a supporting base member with a disk storage portion rotation supporting portion that supports rotatably the first and second disk storage portions so as to make or cover an opening with respect to the disk, the opening being used to get the disk chucked externally and to allow a head to access the data storage side of the disk and read and/or write data from/on that side, and at least one locking member for locking the first and second disk storage portions closed and preventing the first and/or second disk storage portion(s) from rotating with respect to the supporting base member, wherein at least a portion of the supporting base member overlaps with the first and second disk storage portions so as to prevent the first and second disk storage portions from moving perpendicularly to the disk, and wherein the first and second disk storage portions assume either a first opened state in which the disk is not removable or a second opened state in which the disk is removable.