Patent ID: 8555303

Claim:
A disk cartridge comprising: a case body that is capable of housing a plurality of disk-shaped recording media in an inside thereof in a manner to arrange the disk-shaped recording media in an axial direction of a central axis, and that is joined or separated by making a first shell, the first shell including a base face that is parallel to a recording face of the disk-shaped recording media, in contact with or separate from a second shell, the second shell including a base plate that is parallel to the recording face of the disk-shaped recording media, in the axial direction; and a lock lever that is rotatably supported within a face orthogonal to the axial direction and locks the first shell and the second shell in a joining manner, in the inside of the case body; wherein a supporting shaft which serves as a rotation fulcrum of the lock lever is provided to the case body, the lock lever includes a supported part that is supported by the supporting shaft and a lock part that is protruded from the supported part and locks the first shell and the second shell, a disk inserting/ejecting slot, into or from which the disk-shaped recording media are inserted or ejected with respect to the case body formed when the first shell and the second shell are separated from each other, an open/close panel that opens/closes the disk inserting/ejecting slot is provided to the first shell, the lock lever is supported on an end part, the end part being at an open/close panel side, of the case body, an insertion concave part, in which the lock part of the lock lever can be inserted and engaged, is formed within an inner face of the open/close panel, and wherein the lock lever comprises a balance part, the balance part comprising: a protrusion part protruding from the supported part in a direction approximately opposite from a direction in which the lock part protrudes from the supported part; and a regulation protrusion part protruding upwardly and downwardly from an end part of the protrusion part.