A syringe with anti-backflow design is presented, which comprises a tube and a liquid-moving assembly. The tube is hollow and has an injecting end. The liquid-moving assembly includes a rod and an elastic jacket with a through-hole extends axially. One end of the rod has a seal plug with an abutting surface. The rod is arranged in the tube and the abutting surface of the seal plug faces the injecting end of the tube. The elastic jacket covers around the seal plug and the abutting surface of the seal plug is uncovered with the elastic jacket.一種防回血注射器,係包含:一注射筒,呈中空狀且一端形成一注射端;及一推液組件,具有一推桿及一彈性套,該推桿之一端設有一塞塊,該塞塊具有一抵接面,該推桿設置於該注射筒中,且該抵接面朝向該注射筒之注射端,該彈性套設有沿軸向貫穿之一通孔,該彈性套套合於該塞塊,且該塞塊之抵接面裸露於該彈性套之通孔外。1...注射筒11...容室12...注射端13...開口端131...延伸片14...接合部2...推桿21...塞塊211...抵接面212...貼接面213...環形凹槽213a...第一區段213b...第二區段22...操作部3...彈性套31...通孔4...注射針頭
