The utility model safety injector,It includes there is a syringe,One can stretch the push rod being placed in the syringe,And one set protective device in the what syringe outer rim； Wherein,The syringe includes that an inner turns cross hollow stack shell,One connects the syringe needle of the stack shell one end,And separable or the what stack shell other end that connects the support portion,And the aforementioned stack shell and the support portion joint are respectively formed with a solid conjunction portion that can mutually close admittedly； ThereforeIt is in the design separated through the support portion and the stack shell,Therefore when the sleeve of the protective device is intended to be inserted in the stack shell,The support portion first can be separated into stack shell Hou,So that the sleeve can be inserted in easily in the stack shell,And the sleeve can be made in use,Ensure the sleeve without departing from skidding off the ring firmware,And can with the close clip of ring firmware of the protective device,It effectively prevent the syringe needle exposed and stabs safe handling effect of personnel.本新型安全注射器，其包含有一針筒，一可伸置入該針筒內之推桿，以及一設於該針筒外緣上之防護裝置；其中，該針筒包括有一內部圈圍出中空之筒身，一連接該筒身一端之針頭，以及一可分離或相接於該筒身另一端之扶持部，而前述該筒身與該扶持部相接處各形成有一可相互固合之固合部；是以，透過該扶持部與該筒身呈分離之設計，故當該防護裝置之套筒欲套入該筒身時，可先將該扶持部拆離該筒身後，使得該套筒可輕易套入該筒身內，並且可使該套筒使用時，確保該套筒不會脫離滑出該環固件，並且能與該防護裝置之環固件緊密卡掣，有效防止該針頭外露而扎傷人員之安全使用功效。
