Medicament delivery device comprising an elongated housing (10) comprising a grip member (64) connected to the elongated housing and movable between a rest position in which the device has a predetermined grip size and an operation position in which the pre-determined grip size of the device is increased for providing an improved grip of the device during use.藥物輸送裝置包括一瘦長外殼(10)包括一握取構件(64)連接於瘦長外殼且在休息位置(有一預設握取尺寸)和操作位置(增加裝置的預設握取距離,以在使用過程中增進握取方式)之間移動。10‧‧‧瘦長外殼12‧‧‧近端16‧‧‧保護蓋21‧‧‧透明窗口46‧‧‧啟動鈕48‧‧‧末端64‧‧‧瘦長弧形物66‧‧‧環形部68‧‧‧末端環形部