| 摘要 |
PURPOSE:To prevent an electrostriction element from being restrained from the outside, even if any deformation exists in the electrostriction element at the time of assembly, by fixing a supporting member to a body via a supporting shaft after the supporting member and the electrostriction element have been assembled to the body. CONSTITUTION:The fixed end of an electrostriction element 6 is held by a supporting member 10. Further, the supporting member 10 is rotatably journaled, in the bending direction of the electrostriction element 6 when it is operated, on a supporting shaft 11 whose both ends are fixed to a body 1 at the time of assembly. In other words, even if any deformation such a bending exists in the electrostriction element 6 in a nonelectrified condition at the time of assembly, the electrostriction element is not restrained by an external force. Accordingly, it can be naturally incorporated in the interior of the body 1 without causing internal stresses, and the valve body 7 engaged with the electrostriction element 6 is brought in such a condition as it is in close contact with the valve seat 4 only by the energizing force of a spring 9.
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