PROBLEM TO BE SOLVED: To provide a medicine injection tool which can inject a medicine rapidly and precisely with relatively small operating physical force when injecting a medicine into an objective injection space.SOLUTION: A medicine injection tool 10A comprises: a hollow-shaped cylindrical body 12 having a medicine discharge opening at a tip a first plunger 14 liquid-tightly inserted in the hollow of the cylindrical body 12 and having a through-hole 30 passing through in an axis direction a feed screw structure 44 displacing the first plunger 14 in the axis direction with respect to the cylindrical body 12 with rotation of the first plunger 14 with respect to the cylindrical body 12 and a second plunger 16 inserted in the through-hole which can liquid-tightly slide in the axis direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】薬剤を目的の被注入空間に注入する際に、比較的小さな操作力で、迅速かつ精密に注入できる薬剤注入具を提供する。【解決手段】薬剤注入具10Aは、先端に薬剤吐出口を有する中空状の筒体12と、筒体12の中空部に液密に挿入され、軸線方向に貫通する貫通孔30を有する第1押し子14と、第1押し子14の筒体12に対する回転に伴って第1押し子14を筒体12に対して軸線方向に変位させる送りネジ構造44と、貫通孔に軸線方向に液密に摺動可能に挿通された第2押し子16とを備える。【選択図】図2
