Abstract: A disk loading mechanism for a compact disk (CD) device. It contains a frame, a CD tray, and a transmission unit. The transmission unit includes a base plate slidable within an opening of the frame. The base plate has a motor and a set of gears mounted thereon. A transversal rack is mounted on the frame which is engagable with the gear set for causing a transverse movement of the entire transmission unit, which, in turn, causes a vertical movement of the front end of a reading device. The gear set is also engagable with a substantially straight longitudinal rack formed on the CD tray so as to cause a longitudinal movement of the CD tray between a reading position and a loading/unloading position. The transmission unit also includes a vertical pin formed on the base plate which is received and slidable within a guiding path formed on the CD tray.

Abstract: An adjustment mechanism for use in a compact disc recording/reproducing device, which operates with a laser beam of a laser incident on a disc, the adjustment mechanism comprising: a base; a pick-up head, carrying the laser; a first guiding rod and a second guiding rod, guiding a movement of the pick-up head, being parallel to each other and forming a plane with an orientation with respect to the disc that determines the angle of incidence of the laser beam; and at least three supports, extending upward from the base, each holding one end of the first and second guiding rods. Each of the at least three supports comprises a main body, mounted on the base, a spring, pressing from below on the supported end, and an adjusting screw, mounted in a threaded vertical hole in the main body, leaning on the supported end from above, such that the supported end has a well-defined vertical position, which is adjusted by turning the adjusting screw.