| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the detection of a differential pressure.SOLUTION: In a substantially cylindrical case there is formed a substantially cylindrical hole whose center axis is substantially parallel to the center axis of the case. Inside the hole, a substantially cylindrical spool that divides the hole into a first space that is on a low-pressure side and a second space that is on a high-pressure side is slidably provided. Inside the case, a substantially cylindrical reed switch is provided on a side opposite to the spool across the bottom of the hole so that the center axis is substantially parallel to the center axis. The spool is provided with an elastic member for urging a force in a direction heading from the first space toward the second space, and a magnet disposed on the center axis of the reed switch on a surface facing the reed switch. The case and the spool have a rotation stopping mechanism for restraining the spool from rotating relative to the case.SELECTED DRAWING: Figure 3 |
