Abstract: The wire harness 11 disclosed by the present specification includes: a sheet-shaped base member 12; and a plurality of covered electric wires W fixed side by side along the base member 12, in which the transverse cross-sectional area of at least one of the plurality of covered electric wires W is different from the transverse cross-sectional area of another covered electric wire W, and the thickness of the covered electric wire W is substantially the same as the thickness of the covered electric wire W adjacent thereto.

Abstract: The disk drive unit is capable of restraining deformation and vibrations of a disk medium without enlarging size and increasing weight. The disk drive unit, which rotates the disk medium so as to read data from and/or write data in the disk medium, comprises: a pick-up for reading data from and/or write data in the disk medium, the pick-up moving in a prescribed direction; and a top case for covering over an upper face of the disk medium, the top case having an inner face, from which a projection is projected toward the disk medium in the direction perpendicular to the prescribed direction.

Abstract: In the disk drive unit of the present invention, an eject button for ejecting and retracting a tray can be easily pushed while the tray is ejected, and the tray can be ejected and retracted by same action. The disk drive unit comprises: a main body; a tray for holding an optical disk, the tray retracted into and ejected from the main body; a moving mechanism for moving the tray, the moving mechanism including a motor for retracting the tray into and ejecting the same from the main body; and an eject button actuating the moving mechanism so as to eject the tray into and eject the same from the main body, the eject button provided in a front face of the tray.

Abstract: In the disk drive unit of the present invention, an eject button for ejecting and retracting a tray can be easily pushed while the tray is ejected, and the tray can be ejected and retracted by same action. The disk drive unit comprises: a main body; a tray for holding an optical disk, the tray retracted into and ejected from the main body; a moving mechanism for moving the tray, the moving mechanism including a motor for retracting the tray into and ejecting the same from the main body; and an eject button actuating the moving mechanism so as to eject the tray into and eject the same from the main body, the eject button provided in a front face of the tray.