| 摘要 |
PROBLEM TO BE SOLVED: To prevent the easy detachment of a needle cap when not in use. SOLUTION: A small bore cylindrical part 4 is provided at the front end of an injector body 1 and a needle mounting member 5 with a needle 9 attached in such a state as projected forward is detachably fitted to the small bore cylindrical part 4. Also, a needle cap 12 fitted to the needle mounting member 5 for covering the needle 9 is provided and the needle mounting member 5 and the needle cap 12 are provided with a locking means such as a projection row 13 for mutual locking in a fitted state. The needle mounting member 5 is provided with slopes 15 and 10 having step 16 and 11 directed forward and backward and inclined inversely from each other for displacement in axial and peripheral directions. The needle cap 12 is provided with a slope 18 having a step 19 capable of coming in contact with the front stepped slope in such a state as fitted to the needle mounting member 5. Also, the small bore cylindrical part 4 of the injector body 1 is provided with a slope 7 having a step 8 capable of coming in contact with the rear stepped slope with the needle mounting member 5 coupled. |
