Needle shield mechanism for an auto-injector comprising, a tubular housing 10, a needle shield 12 movably arranged in the housing 10, between a retracted state and an extended position, a releasable spring-biased container carrier assembly movably arranged relative to the housing 10 from an initial position to a penetrating position, wherein the container carrier assembly prevents the needle shield 12 from moving to the extended position when the container carrier assembly is in the initial position, and wherein the container carrier assembly allows the needle shield 12 to move to the extended position when the container carrier assembly is in the penetrating position.用於自動注射器的針遮蔽機構包含管狀外殼(10)、於縮回狀態與延伸位置之間可運動地配置在該外殼(10)中的針遮蔽件(12)、相對該外殼(10)由最初位置至穿透位置可運動地配置之可釋放的彈簧加載式容器載具組件，其中當該容器載具組件係於該最初位置中時，該容器載具組件防止該針遮蔽件(12)運動至該延伸位置，且其中當該容器載具組件係於該穿透位置中時，該容器載具組件允許該針遮蔽件(12)運動至該延伸位置。
