| 摘要 |
PROBLEM TO BE SOLVED: To provide a dwelling needle assembly to be easily produced, by which a medical staff member easily store an inner needle into a needle guard by one hand even when a long dwelling needle is used or when a medical staff member with a small hand use the assembly. SOLUTION: The dwelling needle assembly 1 is provided with an outer needle hub 3 where an outer needle 2 is fixed to its tip part, an inner needle hub 5 where the inner needle 4 is fixed to its tip part and the needle guard 6 for storing the inner needle 4 and the inner needle hub 5 inside. The assembly 1 is characterized in such a way that the needle guard 6 is provided with a multiplex structure consisting of pluralities of cylindrical bodies, the needle guard 6 and the inner needle hub 5 are respectively provided with magnets 81 and 82 so as to move the inner needle hub 5 in the needle guard 6 to the base end side by the repulsion force and to successively pull out the cylindrical bodies for extending the needle guard and, then, a locking means 7 is arranged, by which the inner needle hub 5 and the needle guard 6 are held against the repulsion force of the magnets. |
