| 摘要 |
A disc cleaner includes: a supporting body 11 including a first holding plane 12 a, a disc supporting plane 13 and a convex portion 14 , where the first holding plane 12 a holds a first type of disc cartridge, which exposes one side of a disc therein and which includes a rotational member for opening and closing shutters, such that the exposed side of the disc faces the first holding plane 12 a, the disc supporting plane 13 is located higher than the first holding plane 12 a and contacts with a non-storage region of the disc around its center hole, thereby supporting the disc thereon, and the convex portion 14 fits into the center hole of the disc so as to stick out of the center hole; a shutter driving member 31 for turning the rotational member of the first type of disc cartridge; and a rotary knob 21 including a contact plane that contacts with the non-storage region of the disc around its center hole and a concave portion that fits the convex portion so as to turn against the convex portion.
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