The present invention provides a safe protection syringe, which at least comprises a protection cover unit, a pivoting column unit and a needle unit. The protection cover unit is a hollow needle sleeve. The rear end of the needle sleeve is an extension portion, and the rear end of the extension portion is configured with a pivoting hole. The cannula unit is a hollow tube. The pivoting column unit is disposed on the outer periphery of hollow tube of the cannula unit. The cannula unit may be fitted on different barrels and has its front end configured with a stepped section for fixing the needle unit. While fitting the cannula unit, the pivoting column unit may be pivoted with the pivoting hole at the rear end of the protection cover unit, such that the protection cover unit may be provided with excellent positioning and pivoting. Thus, without changing the original barrel and needle structure in principle, the present invention may enable the protection cover unit pivoting to snap the needle of used syringe into the safe protection cover unit, so as to ensure the safety for syringe usage.一種安全保護針筒,該針筒裝置至少包含一保護蓋體單元、一樞柱單元及一針頭單元;其中,該保護蓋體單元係為一中空套針槽,套針槽後端為一延伸部,延伸部後端設一樞孔;該套管單元,係為一中空管體;該樞柱單元係設在套管單元之中空管體外周,其套管單元可套固於各種不同之筒體上,且其前端設有一階級段可供針頭單元固定,並使套管單元套入時,該樞柱單元適可供該保護蓋體單元後端樞孔樞接在一起,因而使該保護蓋體單元受到良好之定位樞轉;藉此,在無需變更原有筒體及針頭結構之原則下,即能構成一可使保護蓋體單元樞轉而將用畢針筒之針頭扣入安全保護蓋體單元內,以確保針筒使用上之安全。10‧‧‧注射針筒11‧‧‧大徑管12‧‧‧小徑管13‧‧‧推桿14‧‧‧針頭座141‧‧‧針頭20‧‧‧保護蓋體單元21‧‧‧套管210‧‧‧延伸部211‧‧‧套接部212‧‧‧樞孔213‧‧‧突緣214‧‧‧定位凸點22‧‧‧套針槽221‧‧‧擋止件222‧‧‧擋止件30‧‧‧樞柱31‧‧‧錐形頭32‧‧‧裂縫33‧‧‧頸部34‧‧‧固定樞部341‧‧‧定位面342‧‧‧定位面
