| 摘要 |
<p>A disk cartridge includes a case accommodating a disk, a cover installed at the case and having an open hole open to the outside, a shutter installed to be capable of moving in the case under the disk to open/shut an open hole formed in the case, and a plurality of protruding portions provided at the shutter to support a non information area provided at an outer circumferential side of the disk and having inclined surfaces inclined at a predetermined angle. When the shutter is opened, the disk descends along the inclined surfaces and, when the shutter is shut, the disk ascends along the inclined surfaces to closely contact a portion around the open hole of the cover.</p> |
