A kind of high-safety needle staying on vein of what is closed in this creation system,Its mainly by sleeve,Retaining piece,Containing tube,Needle holder,Elastic component and soft needle seat are assembled,Wherein retaining piece is made of press section and fixinig plate,Aforementioned sleeves system plugs and is fixed for two retaining pieces are corresponding,And needle holder then wears interval portion,Polygon positioning region in the what needle holder of position can limit the position of needle holder assembling,Hou penetrate annular groove and the opening on fixinig plate again mutually fixed elastic component at this time can then compress in fixed what sleeve,Then what sleeve Hou end containing tube is combined,Soft needle seat is fixed between two press sections again and fixes position by press section by most Hou,Although therefore will not also needle holder be allowed to spring into containing tube press section pressure,When needle holder use finishes,It only needs first to remove soft needle seat and press to press section,Opening, which can be overlapped to use, at this time releases stress through elastic component and needle holder is allowed to spring into containing tube,The purpose of the infusion niidl scathing in needle holder can thereby be taken precautions against.本創作係關於一種安全靜脈留置針，其主要由套筒、固持件、容置管、針頭座、彈性件及軟針座所組裝而成，其中固持件係由按壓部及固定片構成，前述套筒係供二固持件相對應插設並予以固定，而針頭座則穿設中隔部，位於針頭座上的多邊定位部可限制針頭座組裝的位置，之後再透過環形槽與固定片上的開口相固定此時彈性件則會壓縮固定於套筒內，接著將容置管組合於套筒後端，最後再將軟針座固定在二按壓部之間並由按壓部固定位置，因此儘管對按壓部施壓亦不會讓針頭座彈入容置管，當針頭座使用完畢時，僅需先取下軟針座並對按壓部施壓，此時開口會重疊藉以透過彈性件釋放壓力而讓針頭座彈入容置管，藉此可防範針頭座上的輸液針頭刺傷人之目的。
