| 摘要 |
PURPOSE: To make it possible to prevent an infection by extrication of an injection needle by preventing the backward extrication of an injecting and sucking rod and an injector by contact of this injecting and sucking rod with a hollow disk or projection disposed in the rear part of an injection cylinder at the time of withdrawing the injecting and sucking rod into the rear part of the injection cylinder after the use of the injector. CONSTITUTION: A part 3A to be engaged and an engaging part 2B are engaged by rotating both and the engagement of the part 3B to be engaged and the engaging part 1B is released by further rotating both after use of the injection needle. The injecting and sucking rod 2 is then withdrawn backward, by which the injection needle 4 is withdrawn into the injection cylinder 1. At this time, a packing 2A comes into contact with the hollow disk 1A disposed at the rear end of the injection cylinder 1, by which the backward extrication of a needle holding member 3 and the injection needle 4 from the injection cylinder 1 is prevented. |
