A syringe with quantitative rapid suction

Abstract

The invention relates to an injector capable of realizing quantitative and fast suction. The injector comprises a needle cylinder provided with a needle head and a piston rod, wherein the end part of the piston rod is provided with a piston rod press handle, a retainer ring which is vertical to the needle cylinder and outwards extends is arranged around the needle cylinder, the retainer ring surrounds the needle cylinder for a circle, the piston rod press handle is in a round shape by using the piston rod as the circle center, an air bag is arranged between the piston rod press handle and the retainer ring, each of the two ends of the air bag is fixed with the one opposite side of the piston rod press handle and the retainer ring, the air bag surrounds the periphery of the piston rod, and is provided with an air inlet pipe and an air outlet pipe which extend to the outside, a positive-installation reverse valve is arranged in the air inlet pipe, an opposite-installation reverse valve is arranged in the air outlet pipe, the air inlet pipe only allows air to flow into the air bag, and the air outlet only allows the air to flow out of the air bag. The injector has the advantages that the air is inflated into the air bag, the effect of pushing the piston rod to move is achieved, further, the effect of sucking liquid by the needle head is achieved, the automatic control is realized, in addition, the suction speed is controlled through controlling the air inflating speed, the structure is light, ingenious and simple, and natural damage is avoided during storage.

Description

technical field [0001] The invention relates to a quantitative rapid suction syringe, which belongs to the field of medical instruments. Background technique [0002] A syringe is a common medical appliance. The syringe is composed of a needle barrel with a small hole at the front end and a matching piston rod. Syringes are used to inject or withdraw small amounts of liquids into or from otherwise inaccessible areas. When the core rod is pulled out, the liquid or gas is sucked from the small hole at the front end of the syringe, and the liquid or gas is squeezed out when the core rod is pushed in. The process of withdrawing or injecting gas or liquid with a syringe and needle is called injection. [0003] At the same time, the syringe also has a suction function. The most commonly used in medical practice is to use the syringe to draw blood for the diagnosis of diseases. In the preparation of micro-dosage, use the syringe to suck the liquid medicine to realize the transfe...

AI Technical Summary

Problems solved by technology

And in practical application, it is very frequent to use the syringe to suck the liquid. Only relying on the user's experience to use the traditional syringe in many suction situations will cause very serious consequences, and for inexperienced When a person uses a traditional syringe to achieve the suction function, it becomes more serious later, not only the waste of raw materials, but also the safe disposal of the raw materials that are pumped out, and even the failure of the experiment, the death of the strain, etc.

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