| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve structure wherein a valve can be closed more reliably even when a valve element is poorly thrusted against a valve seat. SOLUTION: A shaft portion is provided at the front end of a moving member 10. It consists of a first shaft portion 20 having a smaller diameter than the moving member 10, and a second shaft portion 30 provided on the side of the front end beyond the first shaft portion 20 and having a larger diameter than the first shaft portion 20 and a spherical front end face 31. The valve element 40 has a fitting hole 41 to be fitted to the second shaft portion 30 while forming a gap G between the outer peripheral face of the second shaft portion 30 and itself at a position where it does not hit the moving member 10. On a hole bottom 41a of the fitting hole 41, a planar bottom face is provided on which the front end face 31 of the second shaft portion 30 abuts. On the opening end side of the fitting hole 41, an engaging portion is provided which engages with the whole periphery of an outer peripheral edge 32 of the second shaft portion 30 on the side of the moving member 10. COPYRIGHT: (C)2007,JPO&INPIT
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