The present invention is generally directed to a spring arrangement for use in a drug delivery device and a drug delivery device comprising such a spring arrangement. The spring arrangement comprises a clutch spring (130) which is located axially interposed between a stationary housing component (10) and an axially movable sleeve (40), which sleeve (40) comprises clutch features (43) adapted to engage corresponding clutch features (121) of a clutch element (120). The clutch spring (130) biases the clutch features (43) and the corresponding clutch features (121) into engagement. The sleeve (40) is coupled to a button (70) such that upon actuation of the button (70) the sleeve (40) is translated against the bias of the clutch spring (130) from a proximal position in which the sleeve (40) is rotationally locked to the housing component (10) into a distal position in which the sleeve (40) is rotationally un-locked from the housing component (10). Upon release of the button (70) the clutch spring (130) translates the sleeve (40) and the button (70) into the proximal position.本發明大體涉及一種用於藥物輸送裝置中的彈簧裝置以及包括這種彈簧裝置的藥物輸送裝置。彈簧裝置包括離合彈簧(130)，離合彈簧(130)沿軸向定位，介於固定殼體部件(10)和可軸向移動的套筒(40)之間，套筒(10)包括離合特徵(43)，該離合特徵(43)適合於接合離合元件(120)的對應的離合特徵(121)。離合彈簧(130)使離合特徵(43)和對應的離合特徵(121)偏向成進行接合。套筒(40)耦合到按鈕(70)，使得在按鈕(70)啟動時，套筒(40)克服離合彈簧(130)的偏壓，從套筒(40)旋轉地鎖定於殼體部件(10)的近側位置平移到套筒(40)從殼體部件(10)上旋轉地解鎖的遠側位置。在釋放按鈕(70)時，離合彈簧(130)使套筒(40)和按鈕(70)平移到近側位置。
