Safe syringe for detaching needle by pushing capable of detaching needle from front end of barrel after usage to protect the medical personnel from being stabbed by used needle
The present invention provides a safe syringe for detaching needle by pushing, which comprises a barrel having a plunger capable of moving back and forth, a joining seat assembled to the inner wall of the front end of the barrel through a joining structure, and a needle sleeved to the joining seat. The joining structure is engaged with the taper outer wall of the joining seat by a taper inner wall. The joining structure uses a position-limiting ring protruded from the inner wall of the barrel to constitute the position-limiting function with the position-limiting circular groove of the joining seat. The joining structure provides an engaging groove for engagement with the engaging ring of the joining seat, so as to position the joining seat in the joining structure. When the plunger moves forward to contact the engaging ring of the joining seat, a pushing force may be further applied to push the joining seat together with the needle thereon to detach from the joining structure and the barrel, so that the used needle may be detached from the barrel to protect the medical personnel from being stabbed by used needle.一種推進卸針式安全注射器,包括:一針筒,該針筒中具有一可往復移動的推桿;該針筒的前端內壁通過一接合結構組裝一接合座,該接合座套接一針頭。該接合結構以一錐狀內壁與該接合座之錐狀外壁契合,該接合結構以一凸出於該針筒內壁之限位凸環與該接合座之限位環槽構成限位作用,該接合結構以一嵌合槽供該接合座之嵌合環嵌合其中,據此將該接合座定位於該接合結構中。該推桿向前位移至接觸該接合座之嵌合環時,再施一推力可將該接合座連同其上的針頭一併向前推離該接合結構及針筒,從而達到將使用後的針體與針筒分離,以保護醫護人員避免被使用後之針體戳扎。10‧‧‧針筒101‧‧‧前端11‧‧‧接合結構20‧‧‧推桿30‧‧‧接合座31‧‧‧針座接合部311‧‧‧前端32‧‧‧錐狀外壁33‧‧‧環狀套接槽34‧‧‧限位環槽36‧‧‧嵌合環37‧‧‧軸孔38‧‧‧套接柱40‧‧‧針頭41‧‧‧針座42‧‧‧針體
