Disc cartridge for a plurality of discs

A disc cartridge comprising:

• a case body in which a plurality of disc-shaped recording media can be stored being arranged in an axial direction of a central shaft inside the case body and which includes a first shell having a base face portion parallel to a recording face of the disc-shaped recording media and a second shell having a basal plane portion parallel to the recording face of the disc-shaped recording media, wherein the first and second shells move toward or away from each other in the axial direction, thereby being combined with or separated from each other,
• wherein the second shell is provided with a pair of side face portions which are orthogonal to the basal plane portion, protrude in the axial direction from both end portions of the basal plane portion, extend in a second direction along the end portions of the basal plane portion, and are situated lacing each other, wherein the second direction is substantially perpendicular to the axial direction,
• wherein the basal plane portion comprises an elongated thin-walled portion extending in the second direction a distance greater than a distance the thin-walled portion extends in a third direction and having a thinner thickness than the other portions of the basal plane portion, wherein the elongated thin-walled portion is formed at a central portion between the pair of side face portions in the basal plane portion, wherein the third direction is substantially perpendicular to the axial direction and the second direction, and
• a bridge member which is attached to span the pair of side face portions is provided, wherein the pair of side face portions are connected to one another by the bridge member.