Activation mechanism for a medicament delivery device comprising a housing 20 elongated along a generally longitudinal axis, a spring-biased drive member 30, a locking unit 70, movable from a locked position, preventing longitudinal movement of said drive member 30, to an unlocked position, a first activation member 60 movable relative to the housing 20 a second activation member 80 movable relative to the housing 20, and wherein the locking unit 70 comprises a key member 90, movable relative to the locking unit 70, wherein the first activation member 60 and the second activation member 80 are configured to move the locking unit 70 from the locked position to the unlocked position, wherein upon actuation, the first activation member 60 and the second activation member 80 cooperate in interacting with the key member 90 to move the key member 90 to the cooperating position and to move the locking unit 70 from the locked position to the unlocked position..用於藥物輸送裝置之啟動機構包含外殼(20),沿著大致上縱軸伸長;彈簧加載式驅動構件(30);鎖定單元(70),可由鎖定位置運動至開啟位置,並防止該驅動構件(30)的縱向運動;第一啟動構件(60),可相對該外殼(20)運動;第二啟動構件(80),可相對該外殼(20)運動;且其中該鎖定單元(70)包含按鍵構件(90),可相對該鎖定單元(70)運動,其中該第一啟動構件(60)及該第二啟動構件(80)被建構來將該鎖定單元(70)由該鎖定位置運動至該開啟位置,其中於作動時,該第一啟動構件(60)及該第二啟動構件(80)與該按鍵構件(90)互相作用地配合,以將該按鍵構件(90)運動至該配合位置及將該鎖定單元(70)由該鎖定位置運動至該開啟位置。25‧‧‧框架30‧‧‧驅動構件35‧‧‧能量累積構件60‧‧‧第一啟動構件70‧‧‧鎖定單元80‧‧‧第二啟動構件90‧‧‧按鍵構件
