The invention is a safety injection needle device.Including syringe,The front end of the syringe is provided with a syringe connector；A needle device,Including a needle seat,The needle seat is sleeved on the needle barrel connector.The front end of the needle seat is provided with a needle；An elastic actuator main part,The utility model comprises a fixed U-shaped part.I. movable U-shaped part,A soft hinge part,One V-shaped elastomer and one set,The two U-shaped parts are connected by soft hinge parts.And through the V-shaped elastomer connected at both ends of the through-hole,Sufficient elastic force shall be provided when the two U-shaped parts are bent.The fixed u-part is integrally connected to the kit.And the elastic actuator body part is sleeved on the needle seat with the kit；A protective cover,The protective sleeve has a set space.The front end of the protective sleeve is provided with a plug-in part.The plug-in unit is connected to the plug-in unit extending upward at the end of the movable U-shaped unit.The movable U-shaped part is connected with the protective sleeve.本創作是一種安全注射針裝置，包括針筒，該針筒前端設有一針筒接頭；一針頭裝置，包括一針頭座，該針頭座套接於該針筒接頭，該針頭座前端設有一針頭；一彈性作動主體部，包括有一固定U形部、一活動U形部、一軟質絞鏈部、一V形彈性體及一套件，兩U形部之間是以軟質絞鏈部連接；並藉通口處兩端所連接的V形彈性體，於該兩U形部進行彎折操作時提供充分足夠的彈性作用力，該固定U形部一體連結於該套件，而該彈性作動主體部以該套件套接於針頭座上；一保護套，該保護套具有一套置空間，該保護套的前端邊設有一插接部，該插接部組接於該活動U形部末端向上延伸的受插部，使該活動U形部與保護套相連結。
