| 摘要 |
PROBLEM TO BE SOLVED: To provide an injector for vein that can eliminate a deviation thoroughly, prevent liquid medicine from being leaked and a needle from dropping out from a sheath and simultaneously prevent the needle from being hanged before completing of an injection by mistake while the needle can be pulled back easily into the sheath. SOLUTION: The injector 20 for vein consists of a sheath 21, a plunger 22, a needle 24, a needle holder 23, a guiding structure and a structure for pulling out the needle. In this composition, the guiding structure 25 made between the needle holder 23 and the plunger 22 prevents the plunger 22 from rotating as it only be expanded and shrunk toward the direction of the axis in the sheath 21 and it can be hanged by the first part 48 and the second part 49 for pulling a needle out that are automatically hooked. The first part 48 for pulling a needle out that is made at the needle holder 23 or the plunger 23 have a hooking board that can be moved toward one direction. The first part 48 for pulling needle out that is made on the plunger 22 or the needle holder 23 has a hook. |
