Patent ID: 6820275
Filing Date: 2004-11-16
Classification: G11B

Abstract:
A disc cartridge having:a case which is formed by joining a top shell and a bottom shell, and which rotatably accommodates a disc-shaped disc medium which can be recorded on at least one time and at which recorded/unrecorded regions can be visually identified; an opening, provided in the case, for access to the disc medium; a shutter portion which is provided at an outer side of the case and at a disc medium recording surface side of the case, and which opens and closes the opening; and a covering plate portion in which an opening for access to the disc medium is formed, the shutter portion being movably accommodated between the covering plate portion and the case, wherein a transparent window portion, which enables visual recognition of the recorded/unrecorded regions of the disc medium, is provided respectively at a region of the covering plate portion which region is other than a region where the shutter portion is disposed when the opening is closed, and in a portion of at least one of the top shell and the bottom shell which portion corresponds to the region of the covering plate portion at which the transparent window is provided, the transparent window having a surface area which is less than a surface area of a full side of the disk medium.