Solenoid valve

Abstract

The object of the present invention is to provide a solenoid valve which can be assembled easily and has good production efficiency. A solenoid valve comprising; a valve sleeve () of cylindrical shape having an inner passage () continuing in an axial direction, a spool () arranged in a movable manner in said axial direction at said inner passage of said valve sleeve, a center post () of cylindrical shape having a through hole () connected with said inner passage of said valve sleeve and constituted from a magnetic material, a plunger () constituted from a magnetic material and arranged in a movable manner in said axial direction against said valve sleeve and said center post by placing said center post between said spool in said axial direction, a shaft () constituted from a non-magnetic material comprising an axis part () in which one end is brought into contact with said spool and other end attached to an end face of said plunger and moves in said axial direction inside said through hole of said center post, and a collar part () formed as one body with said axis part and sandwiched between said plunger and said center post when said plunger closely approaches said center post by protruding out in a radial direction from said axial part, and a case part comprising a coil () generating a magnetic force transferring to said center post and housing said plunger and said shaft in inside.