| 摘要 |
PURPOSE: To easily assemble the rear end of a valve element to a retainer and to prevent the rear end from easily dropping off the retainer by providing taper parts which extend radially diagonally inward so as to conically narrow into place, at the front side of a locking part. CONSTITUTION: To fit a rear end of a valve element 12 to the outer periphery of a cylindrical holding part 15a of a retainer 15, taper parts 15c, 15d that conically narrowed into an end of the retainer 15 are provided. Therefore the rear end 12a can be easily assembled to the cylindrical holding part 15a. Further, by assembling the rear end 12a to the outer periphery of the cylindrical holding part 15a and providing the front side of the cylindrical holding part 15a with a locking part 15e which projects radially outwards, the rear end 12a can be prevented from dropping off the cylindrical holding part 15a by means of the locking part 15e. |
