| 摘要 |
PROBLEM TO BE SOLVED: To provide a syringe needle that raises safety in health and life of personnel involved in medical treatment such as doctors, nurses and the like. SOLUTION: The syringe needle is formed with composition including an outer shell 1, a metal needle head 2, a plastic needle head 3 and an outer cover 4. The slidable metal needle head 2 is fit in the outer shell 1, possible to extend and retract with respect to the outer shell 1, and the both outer shell 1 and metal needle 2 can be set at the prescribed position. With push and pull actions of a push block 24 of an upper spring plate 23 at the top of the metal needle head 2, whole of the head 2 can be inserted into the outer shell 1. And a hard needle 22 never escapes from the outer shell 1 when a projecting block of a lower spring plate fits a stopper groove 15. Accordingly, fear that the hard needle 22 of the metal needle head 2 injures hand or finger of clinical personnel by careless handling is reduced. |
