| 摘要 |
PURPOSE:To make a feed performance variable by forming fittably a spacer which regulates a gap between a link-stopping potion and a main-driving-body, between the link-stopping portion of a main-shaft moving responsively to the displacement of the pressure-receiving portion of a pressure-switch and the main-driving-body having an annular main-driving-magnet. CONSTITUTION:A pressure-switch 8 which opens/closes the electric circuit of a pump 2 processes a driven-body 19 and a main-driving-body 17 having a pressure-receiving portion 12, a main-shaft 14 and an annular main-driving- magnet 16. If a nut 24 is tightened up, the push-pressing force of a spring 26 which push-pressure the main-shaft 14 to the pressure receiving portion 12 can be regulated. A spacer 28 is made to be interposed atachably and detachably between a step-portion 14A and the main-driving-body 17. Accordingly, the pressure regulation range of the pressure switch can be made wider, and a pliable counter-move under a variety of using conditions in which a suction- height is different is possible.
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