US Patent 7600235 Optical disk device

According to the invention, case members each include a main surface and side surfaces provided at ends of the main surface. At a corner where a pair of side surfaces in at least one of the case members adjoin, an integral part having at least one pair of continuously integrated side surfaces is provided. Therefore, the corners of the case members can be prevented from bending or deforming, and the mechanical strength of the main surface can be improved. Therefore, the shock resistance can be improved, and the thickness of the case members can be reduced in order to reduce the size and weight of the device.