A kind of equal volume continuous drop pipette gun

Abstract

The invention discloses an equivalent continuous dropping liquid-transferring gun. The liquid-transferring gun comprises an outer casing, an outer sleeve and a piston assembly, wherein the piston assembly comprises a piston rod and a piston arranged on the lower side of the piston rod; a spring reset mechanism sleeves the rod body of the piston rod; the liquid-transferring gun further comprises an inner sleeve; the inner sleeve is fixedly arranged in a cavity formed by the outer casing and the outer sleeve; the piston assembly is arranged in the inner sleeve in a penetrating manner; a tooth groove is formed in the outer side wall of the inner sleeve in the axial direction of the inner sleeve; a plurality of one-way ratchets distributed in the axial direction of the inner sleeve in sequence are arranged in the tooth groove; the intervals of the adjacent one-way ratchets are the same; the liquid-transferring gun is also provided with a quantifying buckle; the upper end of the quantifying buckle sleeves a rod body of the piston rod; a tooth hook raised inwards and matched with the one-way ratchets in the tooth groove is arranged at the lower end of the quantifying buckle. The liquid-transferring gun has the advantages that liquid sucked in one time can be divided into a plurality of equivalent liquid drops, the liquid drops are output continuously, the use is convenient and fast, the time is saved, and the efficiency is improved. The gun is simple to maintain, and the production and use costs are relatively low.

Description

technical field [0001] The invention relates to an equal volume continuous dripping pipette gun. Background technique [0002] The pipette gun is a kind of micro-sampler (pipettor), which first appeared in 1956 and was invented by Schnitger, a scientist at the German Institute of Physiological Chemistry. Later, in 1958, the German company began to produce button-type micro-samplers. , becoming the first company in the world to produce micro-samplers. The suction range of these microsamplers is between 0.1μL-5000μL, suitable for use in clinical routine chemistry laboratories. With the development of micro-samplers to this day, not only is the sample addition more accurate, but also there are various types, such as micro-dispensers, multi-channel micro-samplers, etc. Pipette guns are mostly used for pipetting a small amount of liquid or a small amount of liquid in the laboratory. The specifications are different. Pipette guns of different specifications are equipped with dif...

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Problems solved by technology

[0004] 1. At present, there are three kinds of pipette guns with fixed specifications commonly used in laboratories, which are 10 μL, 200 μL and 1000 μL. Although the volume of the gun is adjustable, it is necessary to adjust the volume before sampling and pointing when performing experimental operations. In addition, when a fixed volume of liquid is taken at one time, the liquid can only be output at one time, and the liquid cannot be continuously divided into several equal parts, so the operation process is relatively cumbersome, which brings a lot of inconvenience to the experimental operation

[0005] 2. Most of the guns in the laboratory now use air cushion (piston stroke) to add samples. When adding samples, due to the small outlet of the gun head, there will be a great impact when the liquid is ejected. This is in some cells. When adding samples in molecular and molecular experiments, the cells or molecules in the test tube or petri dish will be greatly damaged. Therefore, in some experiments that require gentle sample addition, the hand strength of the experimental operator needs to be well controlled. Mistakes will also have a great impact on the follow-up experiment, which is not conducive to the experiment

[0006] 3. In some experiments, multiple consecutive equal-volume droplets are sometimes required. Due to the uncontrollability of the hand strength of conventional pipette guns, it is impossible to ensure the uniformity of continuous sample addition in the drip sample addition.

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