| 摘要 |
The present invention suppresses air from flowing into a high pressure chamber while reducing the number of parts. A plunger (14) is slidably fitted into a body (13). A reservoir (24) is formed in the plunger (14), and a communication hole (25) that establishes communication between the inside and outside is formed in a head part (19) of the plunger (14). A high pressure chamber (28) is formed in the body (13) between a plunger bottom part (20) and a portion of the body, and an oil supply hole (40) is formed in a plunger circumferential wall part (21). A return spring (41) is interposed between the body (13) and the plunger (14), and a valve mechanism (42) is provided on the plunger bottom part (20). In an inner circumferential surface of the plunger (14), an inclined surface part (51b), which is a portion with which a jet (ji) of oil that is jetted from the oil supply hole (40) collides, is inclined so as to slope toward an oil jetting direction as the inclined surface part approaches the plunger head part (19). |
