| 摘要 |
PROBLEM TO BE SOLVED: To provide a Bourdon tube pressure gauge with which it is possible to reduce a friction force between a hand spindle 18 and a hand spindle support member to stabilize the indication accuracy of a needle 17, and in which a rotation piece 13 and the hand spindle 18 do not step out and the needle 17 can indicate an accurate pressure P, even when subjected to a sudden pressure change.SOLUTION: A magnetic member 22 for reducing a force by which a permanent magnet 19 is drawn in by a permanent magnet 21 is provided on a side of the permanent magnet 19 that is opposite a side on which the permanent magnet 21 is disposed. It is thereby made possible to reduce a friction force between the hand spindle 18 and the member that supports the hand spindle, making it possible to obtain the stable and accurate indication of the needle 17. Furthermore, since gears 13a, 18a whose teeth are engaged only when a sudden displacement occurs to a Bourdon tube are formed on the outer circumference of each of the rotation piece 13 and the hand spindle 18, the loss of synchronism can be avoided due to the fact that the teeth of the gears 13a, 18a come into contact, making accurate indication possible, even when subjected to a sudden pressure change.SELECTED DRAWING: Figure 4 |
