ELECTRO-PNEUMATIC AIR PRESSURE REGULATOR, ESPECIALLY IMPROVING RELIABILITY AND RESOLUTION WITHOUT PREVENTING RIGIDITY OF WIRE MEMBER FROM INFLUENCING FLAPPER

摘要

PURPOSE: An electro-pneumatic air pressure regulator is provided to improve connection structure between a coil wire and a coil lead line and to improve reliability of an electric supply unit. CONSTITUTION: The electro-pneumatic air pressure regulator comprises the primary pressure input unit(12) and the secondary pressure exhaustion unit(13) and a main valve(15) for opening and closing between the primary pressure input unit and the secondary pressure exhaustion unit. A flow piston (20) opens and closes the main valve as moving in correspondence to pressure difference between the secondary pressure exhaustion unit and a pilot pressure room(30). A nozzle path connects the pilot pressure room to the atmosphere. A flapper(40) has a leaf spring (41) and a coil(43) installed on the leaf spring. The position of the leaf spring as to the open aperture of the nozzle path is changed according to the amplitude of an analog input signal flowing through the coil of the flapper. A pair of coil wires are guided around the center of the coil on the leaf spring and a diameter direction of the coil is guided in a reverse direction each other, and a pair of lead lines of the coil are guided to the center and then are connected to the pair of coil wires.