Disc cartridge loading and unloading apparatus with a holder and holder arm

Claim 1

A disc device comprising: a floating base supported by a chassis through a plurality of elastic members; a holder arm rotatably supported on said floating base; and a holder, which is rotatably engaged with said holder arm, and into which a disc cartridge is inserted, wherein when replaying the disc cartridge held in said holder, the disc cartridge which is being held in said holder is loaded onto said floating base by rotating said holder with respect to said holder arm and rotating said holder arm with respect to said floating base, said holder including a pair of projecting portions, said holder arm including a pair of circle-shaped notches that engage said projecting portions, wherein said holder is rotatably supported by said holder arm by inserting said pair of projecting portions of said holder into said pair of circle-shaped notches of said holder arm at a first rotational position between said holder and said holder arm and then rotating said holder with respect to said holder arm to a second rotational position different than the first rotational position, wherein a width of the circle-shaped notches is smaller than a longitudinal dimension of said projecting portions, each of said projecting portions having a waist portion of a dimension less than a remainder of said projecting portions in a longitudinal direction, wherein the longitudinal direction is substantially parallel to a loading/unloading direction, said circle-shaped notches having a width less than the longitudinal dimension of said projecting portions such that said circle-shaped notches pivot on said waist portions and are prevented from being disengaged from said projecting portions at the second rotational position.