The present invention relates to a cap for an injection device. The injection device comprises a body for holding a syringe having a needle extending from an end thereof. The cap is removably attachable to the body. The cap comprises an actuator and a needle shield to cover said needle. The cap further comprises a coupling between the actuator and the needle shield. The coupling is configured such that when the cap is attached to the body of an injection device axial movement of the actuator away from the body causes rotation of the needle shield relative to the body.本發明涉及一種用於注射裝置的帽蓋。該注射裝置包括用於保持注射筒的主體,注射筒具有從其一端部延伸的針。帽蓋可移除地附接到主體。帽蓋包括致動器和覆蓋該針的針護罩。帽蓋還包括在致動器和針護罩之間的耦接部。該耦接部構造成使得在帽蓋附接於注射裝置的主體的情況下,致動器遠離主體的軸向移動導致針護罩相對於主體旋轉。11‧‧‧殼體17‧‧‧針18‧‧‧注射筒18A‧‧‧端部19‧‧‧套筒20‧‧‧(注射)裝置/自動注射器21‧‧‧帽蓋22‧‧‧針護罩23‧‧‧致動器/端帽蓋23A‧‧‧凹部23B‧‧‧凸緣部分24‧‧‧殼體25‧‧‧內鞘25A‧‧‧凹部26A‧‧‧連接部