The present invention relates to a medicament delivery device comprising a housing (10) adapted to receive a medicament container (24) an actuation member(48) movable from a first position to a second position, such that the medicament is allowed to be expelled through the delivery member (28)an interlock member (46) movable between a locking position, and a releasing position, the device having an indicator to show that it has been used provided by the actuation member (48) being retained in its second position. The invention is characterised in that the actuation member comprises at least one latching projection (58) and the drive mechanism comprises corresponding latching surfaces(64) against which the latching projections(58) latch when the actuation member (48) is in its second position.本發明有關藥物輸送裝置,包括外殼(10),被設計成適於承納藥物容器(24);作動構件(48),可由第一位置運動至第二位置,使得該藥物被允許經過該輸送構件(28)排出;互鎖構件(46),可於鎖定位置及釋放位置之間運動,該裝置具有一指示器,以顯示其已被使用,該顯示藉由被保留於其第二位置中之作動構件(48)所提供。本發明之特徵為該作動構件包括至少一閂扣突出部份(58),且該驅動機件包括對應閂扣表面(64),當該作動構件(48)係在該第二位置中時,該閂扣突出部份(58)閂扣抵靠著該對應閂扣表面(64)。10‧‧‧外殼14‧‧‧防護件15‧‧‧支臂16‧‧‧舌片18‧‧‧防護件彈22‧‧‧藥物容器夾具24‧‧‧藥物容器28‧‧‧藥物輸送構件30‧‧‧鎖定機件32‧‧‧樑片36‧‧‧作動鎖定構件38‧‧‧環形構件39‧‧‧穿透孔40‧‧‧舌片42‧‧‧支臂44‧‧‧溝槽46‧‧‧互鎖構件47‧‧‧溝槽48‧‧‧作動構件50‧‧‧作動機件52‧‧‧突出部份54‧‧‧按鈕60‧‧‧支臂66‧‧‧溝槽70‧‧‧固持構件74‧‧‧驅動彈簧76‧‧‧信號產生構件78‧‧‧支臂79‧‧‧突出部份80‧‧‧鉤子90‧‧‧驅動機件
