PNEUMATIC PRESSURE CONTROL DEVICE FOR REGULATING PNEUMATIC PRESSURE PRECISELY AND EASILY BY SUPPLYING AND SHUTTING OFF COMPRESSED AIR WITH MICRO-SWITCH

摘要

PURPOSE: A pneumatic pressure control device is provided to correct the error of elastic force of the spring, and to regulate the range of pneumatic pressure easily by adjusting the gap between the piston shaft and the button unit of the micro-switch finely with the spring supporting unit and the micro-switch position adjusting unit. CONSTITUTION: A micro-switch(24) is turned on and off by a piston shaft(14) combined with a piston(12) reciprocating in a cylinder to supply and shut off compressed air. A first cylinder(10) is composed of an air inlet(11) flowing compressed air in, the piston inserting a sealing rubber ring(13), the piston shaft combined with the piston and a spring supporting unit(16) with sliding, and a spring(15) inserted to the piston shaft and elastically installed between the piston and the spring supporting unit. A second cylinder(20) is connected to the first cylinder, and a micro-switch adjusting unit(22) for fixing the micro-switch with a guide rail groove(23) is inserted to the second cylinder. An adjusting screw(27) with a recess(29) is combined with the second cylinder, and inserted to the micro-switch adjusting unit. A recess fitting screw(28) is fitted to the recess of the adjusting screw.