| 摘要 |
PROBLEM TO BE SOLVED: To simply check the pressure maintenance of a working fluid confined within a machine without affecting the performance of the machine. SOLUTION: A first displacement body 52 forms a first base end portion 56 firmly fixed to a member displaced correspondingly to pressure fluctuation and a first displacement portion 71 disposed toward its free end side from the end portion 56, while a second displacement body part 53 forms a second base end portion 55 not displaced correspondingly to pressure fluctuation and a second displacement portion 72 disposed toward its free end side from the end portion 55. The displacement portion 71 comprises a first base-end-side displacement region 73 closer to the end portion 56 and a first free-end-side displacement portion 74 biased from the displacement portion 73 toward its free end side. When the end portion 56 is slightly displaced positionally, the displacement portions 73 and 74 having constant lengths are relatively large deformed curvilinearly to enlarge the amount of displacement, thereby enhancing the accuracy of detection on the presence of a pressure. COPYRIGHT: (C)2005,JPO&NCIPI
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