The present invention relates to a medicament delivery device comprising a distal housing part (12), and a proximal housing part (10) adapted to receive a medicament container (14) comprising a movable stopper (15), wherein said housing parts are configured to be attached to each other a threaded plunger rod (22) arranged within said medicament delivery device and being movable in the longitudinal direction of the device wherein the medicament delivery device further comprises plunger force means (98) operably associated with said threaded plunger rod (22) and configured to exert both a torsion force and a tension force on said threaded plunger rod (22) for positioning the plunger rod in relation to the stopper and for avoiding drooling respectively.本發明有關藥物輸送裝置,包括遠側外殼零件(12);及近側外殼零件(10),被設計成適於承納包括可移動止擋件(15)之藥物容器(14),其中該等外殼零件被建構成將彼此附接;帶螺紋的柱塞桿(22),被配置在該藥物輸送裝置內,且係可在該裝置之縱長方向中移動;其中該藥物輸送裝置另包括柱塞力機件(98),其與該帶螺紋的柱塞桿(22)可操作地相聯,且被建構成在該帶螺紋的柱塞桿(22)上施加扭力及張力兩者,分別用以關於該止擋件定位該柱塞桿與用以避免流涎。10‧‧‧近側外殼零件、藥物容器夾具12‧‧‧遠側外殼零件14‧‧‧藥物容器15‧‧‧止擋件22‧‧‧帶螺紋的柱塞桿30‧‧‧驅動螺帽32‧‧‧遠側外殼零件之壁面38‧‧‧驅動軸桿48‧‧‧扭轉驅動彈簧50‧‧‧近側彈簧附接構件64‧‧‧導引構件72‧‧‧本體94‧‧‧彈簧96‧‧‧墊圈98‧‧‧柱塞桿控制彈簧100‧‧‧固定構件102‧‧‧旋轉器104‧‧‧支撐構件114‧‧‧環形構件116‧‧‧致動構件118‧‧‧彈簧
