| 摘要 |
PROBLEM TO BE SOLVED: To prevent the accident of piercing the hand, etc., of user and further to prevent the infection of disease by hiding the tip of needle at the time other than the time of practical use for injecting medicine or sampling blood. SOLUTION: The existence of ampule or holder is similar to the conventional case. When a piston cock B is pushed while abutting top ends 4b, 4b... of cylinder 4 on the target spot to pierce a main body 1 of injection needle, the cylinder 4 receives pressure between its tips 4b, 4b... and a joint cup 2 and the opening of cylinder 4 is expanded by the existence of slits 4a, 4a... so that the tip of main body 1 of injection needle can be pierced through the target spot. In this case, the expanding margin of cylinder 4 is estimated to be almost 1/3 of the whole. When the main body 1 of injection needle is pulled out of the target spot after usage, the cylinder 4 is returned into original state by elastic force of the slits 4a, 4a... and the tip of main body 1 of injection needle can be hidden. |
