This creation is to provide a kind of restoring device of safety injector,Espespecially a kind of injecting needle base can strong fix what cylinder opening end position innovation kenel design； Mainly blocking device is borrowed and the chimeric linkage that bounces back by being mutually equipped between each needle stand； Unique design is thereby innovated,Make the present invention by borrowing blocking device and the chimeric linkage that bounces back,And the push rod cup quickly inlay card what needle stand group positioning of push rod can be enable,In order to being user-friendly for next step retracting action,And needle stand group can consolidate the open end of assembling positioning what cylinder and be not easy to destroy engaging and sealing function because ambient temperature changes,Such as because Wen Du Ji Noboru reduces the engaging degree between needle stand and cylinder,Cause to inside contract in needle stand what injection process or the phenomenon of leakage,Or it is to make because of temperature decrease in excessively engaging,What injection finishes Hou can not bounce back injection needle and needle stand enters in cylinder etc.,And then make the present invention can reach safety,Environmental protection quality Ti Noboru person.本創作是提供一種安全注射器之回縮裝置，尤指一種注射針座可穩固定位於筒體之開口端位置之創新型態設計；主要是藉由各針座之間互設有借位閉鎖裝置及回縮嵌合連動裝置；藉此創新獨特設計，使本發明藉由借位閉鎖裝置及回縮嵌合連動裝置，而能使推桿之推桿頭能快速嵌卡於針座組定位，俾方便使用者進行下一步回縮動作，且針座組能穩固組裝定位於筒體之開口端而不易因外界溫度變化而使卡合及密封功能性破壞，諸如因温度急昇使針座與筒體間的卡合度降低，導致針座於注射過程中發生內縮或漏液現象，抑或是因温度驟降使呈過度卡合，於注射完畢後無法回縮注射針及針座入筒體內等，進而使本發明可達到安全、環保品質的提昇者。
