Proportional solenoid control valve

Abstract

A proportional solenoid control valve comprises a flat square spring which is wide in maintaining width with respect to displacement of a spring having a greater spring constant, so that accurate control of fluid is realized. The flat square spring has four tabs and is supported with respect to a step face with outer peripheral section thereof. The valve further comprises a sealing mechanism loaded with rubber resilience compensates instability of armature construction and resilient sealing section. The spring constant of the flat square spring is improved by strengthening the magnetic force, thus hysteresis can be made to be smaller.

1 . A solenoid control valve comprising: 
 a solenoid;    a magnetic movable member having a magnetic attraction force applied by the solenoid;    a non-magnetic cylindrical member configured and arranged to guide the magnetic movable member; and    a circular flat spring with an outer periphery section directly contacting an inner diameter of the non-magnetic cylindrical member and an inner periphery section directly contacting the magnetic movable member so as to balance in power with the magnetic movable member due to the magnetic attraction force,    the circular flat spring having a plurality of cutouts, each of the cutouts being formed in a substantially spiral shape, the spiral shape including an outer arc shape, an inner arc shape and a straight shape for connecting the outer and inner arc shapes.