A pullback safe syringe is disclosed, which includes a needle, a syringe and plunger, wherein the needle has a needle body and a needle seat, and the needle seat has an upper needle seat and a lower needle seat. The upper needle seat is for the needle body to fix on, and the lower needle seat is moveably interlocked under the bottom of the upper needle seat. The bottom of the upper needle seat is equipped with a connection part. The syringe is a hollow cylinder, and its front end is formed with a needle socket for the needle to inert and join with, allowing the needle seat to be accommodated within the needle socket. The inner wall of needle socket has an abutment portion, for the needle seat of needle to abut on. The plunger can be pushed into the syringe from the bottom of the syringe, the plunger has a piston on its front end. The piston is joined with a joining part that can be joined with the connection part on the bottom of the needle seat whereby, after injection, a force is applied to squeeze and deform the piston until the joining part and the connection part are joined together so as to allow the needle to be departed from the needle socket and the abutment portion and be pulled back to the interior of the syringe.一種回拉式安全針筒,包括一針頭、一針筒及一柱塞,其中該針頭係具有一針體及一針座,該針座係包括一上針座與一下針座,該上針座供針體固定於上,而下針座係活動卡合於上針座下方,上針座底部則設有一銜接部;該針筒係為一中空筒體,其前端形成為針頭插座,以供針頭插入結合,使該針頭之針座可容納於該針頭插座內,又該針頭插座內壁設有一抵靠部,供針頭之針座抵靠於上;該柱塞可由針筒下方推進於針筒內,該柱塞之前端設有一活塞,該活塞結合有一可與上針座底部銜接部銜接之結合部,藉以使注射完畢後,施加一力量使活塞擠壓變形至結合部與銜接部結合,而使針頭脫離針頭插座與抵靠部被拉回至針筒內部。12...針座121...上針座122...下針座123...棘部124...棘部125...銜接部126...容置空間2...針筒21...針頭插座22...抵靠部
