To exhibit discharge performance by preventing leakage of working fluid.
An electromagnetic pump 20 is configured as follows. The electromagnetic pump is fixed to a valve body 80, while a pump part 40 is inserted into the valve body 80 with a solenoid 30 exposed, and a pin 84 is inserted through a pin hole 82 formed in the valve body 80, so as to engage the pin 84 with a pin groove 44 inside the valve body 80. The pin groove 44 is formed at a position more distant from the solenoid 30 than a position where a discharge port 43 is formed. As a result, hydraulic oil is prevented from reaching the solenoid 30 side even if hydraulic oil leaks from the discharge port 43 into a gap between a cylinder 42 and the valve body 80, thereby preventing a drop in oil pressure.
FUJII NORIOMI
KATO KAZUHIKO
