The present invention relates to a medicament delivery device comprising a housing (10), which housing is arranged to accommodate a medicament container (20) a power unit (88) comprising: a drive force element (98), an actuation unit (90, 102) operably connected to said drive force element (98) which actuation unit (90, 102) is movable, upon activation of said drive force element (98), for expelling a dose of medicament from said medicament container (20) a monitoring unit (130) provided with an electrical power source (140) for operating said monitoring unit (130). The invention is characterised in that the medicament delivery device further comprises an activation element (160) operably connected to said actuation unit (90, 102), to said monitoring unit (130) and to said electrical power source (140), wherein said activation element (160) is arranged to allow connection between said electrical power source (140) and said monitoring unit (130) when said actuation unit (98, 102) is moved.本發明有關藥物輸送裝置,包含外殼(10),該外殼被配置來容納藥物容器(20);電源單元(88),包含:驅動力元件(98);作動單元(90、102),可操作地連接至該驅動力元件(98);該作動單元(90、102)係可於該驅動力元件(98)之啟動時運動,用於由該藥物容器(20)排出一劑量的藥物;監視單元(130),設有用於操作該監視單元(130)之電源(140)。本發明的特徵在於該藥物輸送裝置另包含啟動元件(160),其可操作地連接至該作動單元(90、102)、至該監視單元(130)、及至該電源(140),其中該啟動元件(160)被配置來當該作動單元(90、102)運動時,允許該電源(140)及該監視單元(130)間之連接。10‧‧‧外殼12‧‧‧遠側端14‧‧‧近側端16‧‧‧開口18‧‧‧藥物容器夾具20‧‧‧藥物容器22‧‧‧塞子26‧‧‧硬式針屏蔽件28‧‧‧中心通道30‧‧‧藥物輸送構件防護件32‧‧‧彈性元件34‧‧‧支柱44‧‧‧轉子88‧‧‧電源單元114‧‧‧移除器116‧‧‧抓握部份130‧‧‧監視單元
