Patent ID: 7493635

Claim:
A disk cartridge drive apparatus, comprising: a holder configured to receive a disk cartridge therein and to hold the same, the disk cartridge including a disk, a case configured to accommodate the disk, and including an arc-shaped surface formed at an insertion direction side of the holder, and side surfaces continuing both ends of the arc-shaped surface and respectively formed as direct lines at the insertion direction, a light transparent aperture formed contiguous with one side surface of the side surfaces and configured to input a laser beam, an insertion groove formed between the arc-shaped surface and a portion at an ejection direction side of the light transparent aperture in the one side surface, and a function expansion groove formed between the arc-shaped surface and a continuous portion of the arc-shaped surface and another side surface; and a shutter opening piece provided at a position opposed to the one side surface of the disk cartridge, in the holder, wherein when the disk cartridge is inserted into the holder, if the shutter opening piece is inserted into the insertion groove, the shutter opening piece is moved to a portion of the ejection direction side of the insertion groove, and if the shutter opening piece is inserted into the function expansion groove, the shutter opening piece is contacted with an aperture edge of the function expansion groove formed at the continuous portion to thereby prevent the insertion of the disk cartridge into the holder.