| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive syringe 1 preventing an erroneous puncture accident. <P>SOLUTION: An outer hub 5 is mounted on the distal end of the barrel 2 of the syringe 1, an inner hub 7 on which a cannula 6 is mounted is provided in the outer hub 5 so as to be moved back and forth, and a spring 8 is elastically equipped between the inner hub 7 and the outer hub 5. A through-hole is formed from the outer peripheral surface to the inner peripheral surface on the outer hub 5, the engagement pin of an engagement member is inserted into the through-hole, the engagement pin is mutually engaged with a recessed part formed on the inner hub 7 and the inner hub 7 is held at the position of being moved forward against the energizing force of the spring 8. After using the syringe 1, by pulling out the engagement member 9, the engagement pin and the inner hub 7 are disengaged, and the inner hub 7 is moved back by the energizing force of the spring 8 and is housed inside the barrel 2 together with the cannula 6. <P>COPYRIGHT: (C)2008,JPO&INPIT |
