A kind of rotary type safety syringe-drum,Include an outer cylinder,One needle holder,And an injection putter,One end of outer cylinder has an inward flange,Needle holder has the stop section of single order slot and an adjacent rank slot,Needle holder abuts the inward flange of what outer cylinder when assembling what outer cylinder by rank slot,When syringe needle seat one first position of what,The inward flange of the stop section clamping what outer cylinder of needle holder,When syringe needle seat one second position of what,It is mutually staggered between the stop section of needle holder and the inward flange of outer cylinder,Injection putter is movably worn in what outer cylinder and separably attached what needle holder,Needle holder is turned to the second position from first position,Enable needle holder to be injected push rod to be returned in outer cylinder,The safety of Hou is finished in injection to increase.一種轉動式安全針筒，包含有一外筒、一針頭座，以及一注射推桿，外筒之一端具有一內凸緣，針頭座具有一階槽與一鄰接階槽之擋止部，針頭座在組裝於外筒時藉由階槽抵接於外筒之內凸緣，當針頭座位於一第一位置時，針頭座之擋止部卡接於外筒之內凸緣，當針頭座位於一第二位置時，針頭座之擋止部與外筒之內凸緣之間相互錯開，注射推桿可移動地穿設於外筒內且可分離地連接於針頭座，用以將針頭座從第一位置轉動至第二位置，使針頭座能被注射推桿拉回至外筒內，以增加在注射完畢後的安全性。
