A suite for a syringe includes a first barrel, a extendable assembly, a cover, a tape body and a driving piece. The first barrel is arranged around a cylinder of a syringe. The first barrel has a receiving groove. The receiving groove has an opening which is set facing outward. The extendable assembly includes at least one second barrel. The extendable assembly is extendably provided at the front end of the first cylinder for a needle of the syringe to penetrate through. The cover is pivotal swinging cover set on a opening of the second barrel. The tape body is movably disposed around the receiving groove, and one end of the type body is protrudes from the opening of the receiving groove. The driving piece is disposed around the first barrel. One end of the driving piece is connected with one end of the tape body in the receiving groove, the other end is connected with the cover. The driving piece and the tape body are in a linking-up relationship.本發明關於一種注射器用之套件,其包括一第一筒體、一伸縮套件組、一蓋體、一帶體及一驅動條。該第一筒體係供套設於一注射器之一注射筒上,該第一筒體設有一容置槽,該容置槽具有一朝外設置之開口。該伸縮套件組包括至少一第二筒體,該伸縮套件組可伸縮地設於該第一筒體之前端且供該注射筒之一針體穿設於該伸縮套件組。該蓋體可樞擺地覆設於一該第二筒體之開孔。該帶體可活動地繞設於該容置槽且一端凸出於該開口。該驅動條繞設於該第一筒體,一端與該帶體位於該容置槽之一端固結,另一端固結於該蓋體,該驅動條係與該帶體成連動關係。1‧‧‧注射器用之套件2‧‧‧第一筒體3‧‧‧伸縮套件組4‧‧‧蓋體5‧‧‧帶體6‧‧‧驅動條7‧‧‧環件23‧‧‧夾腳24‧‧‧外螺紋部26‧‧‧穿孔27‧‧‧卡扣部21‧‧‧容置槽
