| 摘要 |
PROBLEM TO BE SOLVED: To prevent injection fluid from being kept injected when a needle does not close. SOLUTION: This injector includes a housing 20 having injection fluid passage parts 27, 34, 62, 212, 222, 233 in which injection fluid flows and an injection hole 28 injecting injection fluid flowing in the injection fluid passage parts formed thereon, the needle 30 opening and closing the injection hole 28, a drive part 40 driving the needle 30, and a shut off valve 95 shutting off supply of injection fluid to the injection hole 28 from the injection fluid passage parts when dynamic pressure of the injection fluid at the injection fluid passage parts become excessive. For example, the shut off valve 95 may be composed of a ball valve. COPYRIGHT: (C)2010,JPO&INPIT |
