Patent ID: 8920379

Claim:
A liquid injection apparatus comprising: a body unit comprising a driving device, a cam member rotated by the driving device, and a connecting member reciprocally driven by the cam member; a needle unit detachably mounted to a front end of the body unit; and a rubber member installed to the needle unit, for blocking blood and liquid mixture which are discharged from a skin of a patient and flow into the needle unit, from flowing to the body unit during a medical procedure, wherein the needle unit comprises: a needle support comprising a plurality of needles and a plurality of liquid discharge holes for ejecting liquid; a liquid reservoir coupled with the needle support in one opening and containing liquid; a movable rod connected to the liquid reservoir with one side and detachably connected to the connecting member with the other end; and a cap unit for surrounding the needle support and the liquid reservoir and comprising a support unit which the movable rod penetrates, wherein the liquid reservoir forms a first liquid injection hole of a long hole shape in one side, and the cap unit forms a second liquid injection hole in one circumference surface.