| 摘要 |
A pressure switch for electric motion pump using screw shaft is provided to easily confirm setting pressure indicated by scale index piece by broadening interval of pressure display scale. A screw shaft(30) has a top male screw part(31) and a bottom male screw part(32) having different pitch. A bottom guide(60) is coupled with the bottom male screw part of the screw shaft, and is lifted according to the screw shaft when the screw shaft is rotated. A scale index piece is installed in the bottom guide. A switch(73) is installed in a top guide(70). A spring case(110) is installed in one side inside a case. A driving terminal(120) controls the switch. A switch adaptor assembly(140) is connected to a electric motion pump(P), and pushes the driving terminal into the switch by a fluid pressure supplied from the electric motion pump.
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