The present invention relates to a medicament delivery device comprising a distal housing part (10) a proximal housing part (12), said proximal housing part being arranged to accommodate a multi-compartment medicament container (34), wherein said housing parts are designed and arranged to be movable in relation to each other from a first position in which said housing parts are partially extended in relation to each other, to a second position in which said housing parts are partially retracted in relation to each other a drive mechanism arranged in said distal housing part (10) comprising a plunger rod (44) and an auto mixing mechanism configured to hold said housing parts in the first position and to lock said housing parts in the second position wherein said auto mixing mechanism comprises a mixing force member (30) operably arranged between said housing parts, such that manual activation of said auto mixing mechanism allows said mixing force member (30) to cause the two housing parts to move from the first position to the second position whereby said plunger rod (44) acts on said multi-chamber medicament container (34) to perform a mixing of a medicament contained in said multi-compartment medicament container (34).本發明相關藥物輸送裝置,包括遠側外殼零件(10);近側外殼零件(12),該近側外殼零件被配置來容納多隔室藥物容器(34),其中該等外殼零件被設計及配置成可關於彼此由第一位置運動至第二位置,該等外殼零件在該第一位置中係關於彼此局部地延伸,且該等外殼零件在該第二位置中係關於彼此局部地縮回;驅動機件,被配置在包括柱塞桿(44)的遠側外殼零件(10)中;及自動混合機件,被建構成將該等外殼零件固持於該第一位置中,並將該等外殼零件鎖定於該第二位置中;其中該自動混合機件包括一可操作地配置於該等外殼零件之間的混合力量構件(30),使得該自動混合機件之手動啟動允許該混合力量構件(30)造成該二外殼零件由該第一位置運動至該第二位置,藉此該柱塞桿(44)作用在該多室藥物容器(34)上,以施行該多隔室藥物容器(34)中所裝盛之藥物的混合。12‧‧‧近側外殼零件26‧‧‧突出部份28‧‧‧凸部30‧‧‧混合力量構件32‧‧‧突出部份34‧‧‧藥物容器44‧‧‧柱塞桿46‧‧‧驅動力機構48‧‧‧近側端壁面50‧‧‧遠側端表面52‧‧‧啟動構件54‧‧‧導引桿80‧‧‧按鈕82‧‧‧內表面
