Disc cartridge and disc drive apparatus using the same

A disc drive apparatus which performs a recording and reproduction operation by receiving a disc cartridge having a case, which accommodates a disc, in a holder and loading the disc cartridge, comprising:

• first flat surface portions formed on both first side end portions of the case parallel to a direction in which the cartridge is inserted in the holder;
• second flat surface portions formed on both second side end portions of the case perpendicular to the direction;
• a step portion formed on one of the first flat surface portions to protrude outwardly and having a thickness less than that of the case corresponding to the one of the first flat surface portions;
• inner walls formed on sides of the holder to support the disc cartridge to be inserted into the holder while having surface contact with the first flat surface portions;
• and
• a slot portion formed on one of the inner walls into which the step portion is inserted when the case is inserted into the holder.

A disc drive apparatus to perform a recording and reproduction operation by receiving a disc cartridge having a case, which accommodates a disc, using a holder, and loading the disc cartridge, comprising:

• first flat surface portions respectively formed on both first side end portions of the case perpendicular to a direction in which the cartridge is inserted in the holder;
• second flat surface portions respectively formed on both second side end portions of the case parallel to the direction in which the cartridge is inserted in the holder;
• and
• a step portion formed on one of the first flat surface portions to protrude outwardly from the one of the first flat surface portions and having a thickness less than that of the case corresponding to the one of the first flat surface portions;
• inner walls provided on both sides of the holder to support the disc cartridge to be inserted into the holder while having surface contact with the second flat surface portions;
• wherein an interval between the inner walls of the holder is less than a sum of a length between the first flat surface portions and a protruding length of the step portion.