Patent ID: 7484232
Filing Date: 2009-01-27
Classification: G11B

Abstract:
1. A disc cartridge comprising: a body having a disc housed rotatably therein; a driving aperture through which a disc rotation driving mechanism to rotate the disc accesses the disc in the cartridge body and a write and/or read aperture though which information signals are to be written to or read from the disc, both apertures being formed at one side of the cartridge body; a shutter member including a shutter plate portion to open and close the write and/or read aperture, movement guide piece formed to rise from the shutter plate portion, support pieces provided in a plurality of places spaced from each other in a sliding direction of the shutter plate portion and which are bent from the movement guide piece and supported on a sliding guide portion of the disc cartridge, and engagement pieces projected toward the support pieces to the shutter plate portion to hold the sliding guide portion between themselves and the support pieces; the sliding guide portion including a guide recess in which the support pieces of the shutter member are to be inserted to be slidable and a guide rail portion on which the engagement pieces are fitted and which supports the shutter member to be slidable; and a cut formed in the guide recess formed to have such a taper that a depth thereof at an upstream side in a direction to open the write and/or read aperture is larger than that at a downstream side.