The present disclosure relates to a safety mechanism (5) for a push-off cap of a medicament delivery device. The safety mechanism (5) includes a cap (9) and an actuator assembly (11). The cap (9) has a through-opening (9b) and is configured to be mounted to the proximal end of a medicament delivery device. The actuator assembly (11) is configured to be received by the cap (9), and extend proximally from the cap (9). The actuator assembly (11) is linearly displaceable relative to the cap (9), from a first position in which the actuator assembly (11), to a second position in which the actuator assembly (11) is displaced in the distal direction and received further by the cap relative to the first position. The actuator assembly (11) includes a guide structure configured to guide linear displacement of the actuator assembly (11) relative to the cap (9), a proximal top member (11c) and a lock structure (11d). The proximal top member (11c) is pivotally arranged relative to the guide structure (11a), between a first pivot position and a second pivot position. The lock structure (11d) extends distally, from a distal surface of the proximal top member (11c), from the proximal top member to the proximal end surface of the cap. By pivoting the proximal top member (11c) relative to the guide structure (11a), the lock structure (11d) which is pivotally fixed relative to the proximal top member, will also be pivoted. The proximal top member (11c) is pivotable from the first pivot position in which the lock structure (11d) is configured to be bear against the proximal end surface (9a) of the cap (9) to the second pivot position, in which the lock structure (11d) aligns with the through-opening (9b) of the cap (9).本揭示內容有關用於藥物輸送裝置之推離式蓋件的安全機構(5)。該安全機構(5)包括蓋件(9)及致動器組合體(11)。該蓋件(9)具有穿透開口(9b),且被建構用於安裝至藥物輸送裝置之近側端。該致動器組合體(11)被建構用於藉由該蓋件(9)所承納,且由該蓋件(9)朝近側地延伸。該致動器組合體(11)係相對該蓋件(9)由第一位置可線性地位移至第二位置、及進一步相對該第一位置被該蓋件所承納,該致動器組合體(11)在該第一位置中由該蓋件(9)朝近側地延伸,且該致動器組合體(11)係在該遠側方向中位移。該致動器組合體(11)包括導引結構,被建構用於
