Described is an autoinjector (1) comprising a case (2) including a rib (2.3), a needle shroud (7) telescopically coupled to the case (2) and movable between a first extended position (FEP), a retracted position (RP) and a locked second extended position (SEP), a carrier (8) slidably arranged in the case (2), adapted to hold a medicament container, and movable from a first axial position to a second axial position relative to the case (2), a collar (16) rotatably and slidably disposed in the case (2) and coupled to the needle shroud (7) and the carrier (8), and a trigger button (13) operably coupled to the carrier (8). The carrier (8) abuts the rib (2.3) in the first axial position and the needle shroud (7) is in the first extended position (FEP) and disengages the rib (2.3) when the needle shroud (7) is in the retracted position (RP) and the trigger button (13) is pressed to advance the carrier (8) to the second axial position.本發明係關於一種自動注射器(1),其係包括:包含一肋條(2.3)的一外殼(2);一針罩(7),其係可伸縮地耦合至該外殼(2)並可在一第一伸出位置(FEP)、一縮回位置(RP)及一鎖定第二伸出位置(SEP)之間移動;一載具(8),其係可滑動地設置於該外殼(2)中及適用保持一藥劑容器,以及相對於該外殼(2)可從一第一軸向位置移到一第二軸向位置;一軸環(16),其係可旋轉及可滑動地配置於該外殼(2)中並耦合至該針罩(7)及該載具(8);以及一觸發按鈕(13),其係可操作地耦合至該載具(8)。該載具(8)在該第一軸向位置時抵接該肋條(2.3),以及該針罩(7)處於該第一伸出位置(FEP)並在該針罩(7)處於該縮回位置(RP)及該觸發按鈕(13)壓下時脫離該肋條(2.3)以推進該載具(8)至該第二軸向位置。1‧‧‧自動注射器2‧‧‧外殼2.1‧‧‧前外殼2.2‧‧‧後外殼2.3‧‧‧肋條2.4‧‧‧窄區段2.5‧‧‧寬區段3‧‧‧針筒4‧‧‧針5‧‧‧保護針套6‧‧‧止動件7‧‧‧針罩7.1‧‧‧斜坡特徵8‧‧‧針筒載具8.1‧‧‧近端部份8.2‧‧‧柔性第一長條8.3‧‧‧柔性第二長條8.4‧‧‧第一凸部9‧‧‧控制彈簧10‧‧‧驅動彈簧11‧‧‧可移除帽蓋12‧‧‧柱塞13‧‧‧觸發按鈕14‧‧‧按鈕鎖定機構15‧‧‧柱塞釋放機構16‧‧‧軸環D‧‧‧遠端方向M‧‧‧藥劑P‧‧‧近端方向FEP‧‧‧第一伸出位置
