Abstract: In the present invention, a molding process of keptops is performed by inserting a previously silk-printed thin film into a mold. Therefore, it is possible to implement a small sized and light product by connecting a plurality of keytops using a film, and a tactile feel of a user is increased. In addition, in the present invention, since a silk printing process is not required, the productivity of a keytop sheet is enhanced, and it is possible to decrease the defect rate of the product compared to the conventional art.

Abstract: A pressure control valve for a power steering apparatus comprises a pin extending along the movement of a spool and contacting on a solenoid with one end of the pin, a bore provided slidably in the spool and having a longer length than the pin, a first annular groove communicated with an oil passage change valve, and a second annular groove communicated with a reaction chamber as well as the first groove, and the second groove communicating with the bore.

Abstract: A setting apparatus of an antenna for satellite broadcasting in a satellite broadcasting system includes a receiving device coated with a fluorescent material whose color varies depending on a level of a voltage applied thereto, for receiving a satellite broadcast signal; and a controlling unit coupled to the receiving device for applying a driving power source to the fluorescent material of the receiving device, depending on a level of the satellite broadcast signal received in the receiving device.

Abstract: A power assistance steering system for use in a vehicle comprises a restricting mechanism including a cylindrical reaction piston having a reaction surface on which said reaction pressure is applied in order to cause said reaction piston to be biased downwardly, and at least one reversed V-shaped depression formed on a bottom skirt, the cylindrical reaction piston adapted to be held on the input shaft in such a way that said reaction piston can longitudinally and slidably reciprocate with respect to the input shaft, while circumferentially locked to the input shaft, and at least one semi-spherical protrusion formed on a middle end surface of said output shaft so as to be retained within the reversed V-shaped depression.