Infusion device

Abstract

The utility model relates to a kind of liquid injection devices, and liquid injection device includes: liquid storage cup, including cup body and guide cylinder, cup body is equipped with liquid storage cavity and liquid outlet hole, guide cylinder is equipped with liquid guide passage, guide cylinder is set in liquid storage cavity, the first end of liquid guide passage is exposed in liquid storage cavity, the second end of liquid guide passage is communicated liquid outlet hole;Cover, movable cover is set in the end of guide cylinder;And positioning structure, it is set between cover and guide cylinder, to form guide interval between the outside of guide cylinder and the inside of cover, guide interval is communicated liquid storage cavity and liquid guide passage respectively.Such, it can realize the accurate quantitative control of liquid volume, completely avoid the problem of too much or too little injection, improve injection precision, also can form clear liquid volume upper limit signal in injection process, user does not need to rely on scale or hand feeling to accurately stop injection, significantly improve operation convenience.

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