Abstract: A device housing for example a CD-ROM player, which includes a rack having two recessed seats bilaterally disposed at one side and two cushions at the recessed seats; a slide, the slide having a sliding rack meshed with a reducing gear, two longitudinal tracks at two opposite lateral sides, and two calibration members for guiding linear motion of the slide, the calibration members each having a bottom coupling flange respectively coupled to the tracks, two mounting lugs at one side, and a horizontal bottom bearing flange, the horizontal bottom bearing flange defining a receiving space for receiving said tracks; a casing, the casing having two mounting holes bilaterally disposed near a rear side thereof, and two pairs of side holes disposed at two opposite vertical side walls thereof and respectively fastened to the mounting lugs at the calibration members; and a suspension plate connected between the rack and the casing, the suspension plate having two first mounting holes disposed at two opposite ends thereo