Patent ID: 7739702

Claim:
An optical disk device comprising: an optical pick-up module including: a rotating portion that rotates an optical disk when the optical disk is mounted thereon; a carriage mounting at least a light source and being provided movably within the optical pick-up module; and a cover having an opening formed thereon, a light being radiated from said light source through the opening toward the outside of the cover; and a tray supporting the optical pick-up module, wherein: the tray includes an optical disk attachment region portion opposed to the optical disk and an outside portion provided on an outside of the optical disk attachment region portion, the outside portion has a ledge along its portion adjacent to at least a portion of a circular perimeter of the optical disk when the optical disk is mounted on the rotating portion, the ledge having first and second opposing surfaces, the optical disk, when mounted on the rotating portion, lies entirely between a first plane defined by the surface of the cover and a second plane defined by said first opposing surface, said first opposing surface being closer to the surface of the cover than is said second opposing surface, and a concave portion is provided on a back face side of the outside portion.