Abstract: A disk drive includes a chassis and an upper case forming a disk drive body, a door element, and a moving-side cam mechanism being a door-element moving unit. The chassis has an opening portion through which a disk is loaded or unloaded and which is formed in a loading/unloading direction of the disk. The door element is supported by the disk drive body so as to be movable in the loading/unloading direction with respect to the opening portion and is supported by the chassis so as to be movable in an opening/closing direction of opening or closing the opening portion. The moving-side cam mechanism moves the door element blocking the opening portion, in the unloading direction of the loading/unloading direction and moves the door element separated from the opening portion, in a direction of opening the opening portion, in association with an unloading operation of the disk.

Abstract: A relative-moving-side projection is formed on a front surface and a fixed-side groove that can engage with a fixed-side projection is formed on a rear surface of a tray. The fixed-side projection is formed on a bottom surface of a chassis. A relative-moving-side groove that can engage with the relative-moving-side projection is formed on a ceiling surface of an upper case. When the tray is moved from a disk loading position to a disk reproducing position, a state where the relative-moving-side projection and the fixed-side projection respectively engage with the relative-moving-side groove and the fixed-side groove is maintained. The relative-moving-side projection moves with respect to the fixed-side projection while the tray is moved.

Abstract: A loading apparatus is provided with: a roller device capable of abutting on a recording medium from the side of one surface of the recording medium, which is inserted through an insertion slot, and rotating to carry the recording medium in a carrying direction; and at least one arm device which is constructed such that the end portion thereof abuts on one portion of a peripheral portion of the recording medium on the other surface, to press the recording medium onto said roller device from the other surface side, and that a portion including the end portion evacuates from a space to which the recording medium will be carried, by the end portion being moved along the peripheral portion as the recording medium is carried in the carrying direction.