Patent ID: 6603725
Filing Date: 2003-08-05
Classification: G11B

Abstract:
A disk recording/reproducing apparatus for selectively installing therein a first disk cartridge having a first detection hole and being of a first thickness and a second disk cartridge smaller than said first disk cartridge, being of a second thickness less than the first thickness, and having a second detection hole, where a mis-erase protecting plug is slidably positioned between an upper shell and a lower shell of the first disk cartridge and the second disk cartridge, respectively, and opens and closes a mis-erase preventing detection hole of each of the first disk cartridge and the second disk cartridge, where a respective portion of the mis-erase protecting plug disposed through the mis-erase preventing detection hole of each of the first disk cartridge and the second disk cartridge is used as the detection surface for the mis-erase preventing detection hole, the apparatus comprising:a turntable; an optical pickup; a first positioning pin having a first height-positioning base, the first positioning pin being for engagement with a positioning aperture provided on said first cartridge for positioning said first disk cartridge; and a second positioning pin having a second height-positioning base, the second positioning pin being for engagement with a second positioning aperture provided on said second cartridge for positioning said second disk cartridge; and a common detection switch for detecting said first detection hole and said second detection hole, wherein a height of said first detection hole when said first disk cartridge is installed and a height of said second detection hole when said second disk cartridge is installed are the same, wherein said second positioning pin is located at a position outside of a periphery of a disk included in said first disk cartridge.