Provided is a medicament delivery device (100) comprising a tubular housing (110), having a proximal The present invention relates to a medicament delivery device comprising a tubular housing arranged to accommodate a medicament container； a dose setting member being rotatable in relation to the housing for setting a dose to be expelled； a plunger rod arranged to act on a stopper inside said medicament container such that a translational movement of the plunger rod in a proximal direction causes the dose to be expelled； a drive means for converting a rotational movement of the dose setting member into translational movement of the plunger rod； a clock spring arranged transversal in relation to the longitudinal direction of the device and having a first end connected to the dose setting member and a second end connected to a drive member which is interactively connected to the plunger rod, such that the clock spring is tensioned upon rotation of the dose setting member； and a hold and release member releasably connected to the drive member for holding and -releasing the clock spring in-from a tensioned state； wherein the device further comprises activation means having a distal end protruding through a distal passage of the dose setting member, and being interactively connected to the hold and release member such that when said activation means is pushed in the proximal direction, the hold and release member is proximally moved whereby the clock spring is released from its tensioned state forcing said drive member to rotate.本發明係關於一藥物輸送裝置包括一管狀外殼用來容納一藥物容器；一劑量設定構件可相對於外殼旋轉以設定一排出劑量；一柱塞桿被用來作用於該藥物容器內的瓶塞，以致一柱塞桿向近端的橫向移動造成藥劑被排出；一驅動裝置用來將劑量設定構件的旋轉移動轉換成柱塞桿的平移；一時鐘彈簧相對於該藥物輸送裝置的縱方向橫向置放，且有一第一端連接於藥劑設定構件和一第二端連接於一驅動構件(可互動地連接於柱塞桿)，以致時鐘彈簧藉由劑量設定構件被壓縮；和一支托和鬆開構件可鬆開地連接於驅動構件以支托時鐘彈簧於壓縮狀態和從壓縮狀態鬆開；其中該藥物輸送裝置又包括啟動裝置有一末端突出於劑量設定構件的末端通道，且可互動地連接於支托和鬆開構件，以致當該啟動裝置被推向近端時，支托和鬆開構件被向近端移動，藉此時鐘彈簧被從壓縮狀態鬆開，迫使驅動裝置轉動。
