Pipette gun with rotating and replacing tip

Abstract

The invention provides a pipette capable of rotatably replacing gun heads. The pipette comprises a gun body and the gun heads, wherein a piston cavity is arranged inside the gun body, and a piston is arranged inside the piston cavity, and the gun heads are arranged at the end part of the gun body. The pipette is characterized in that each gun head comprises a fixed part connected with the gun body and a revolving part connected with the fixed part cooperatively; a ventilation hole is formed in the fixed part; the ventilation hole is communicated with the piston cavity of the gun body; and a plurality of perforated gun heads are arranged on the revolving part. By rotating the revolving part, after one of the perforated gun heads directly faces the ventilation hole on the fixed part, the piston can be pulled to generate a negative pressure in the gun head, the ventilation hole and the piston cavity which are communicated to each other, so that a reagent can be pipette into the gun head; after the pipette is transferred to a corresponding container, the piston is pushed to squeeze out the reagent in the gun head; and then by rotating the revolving part, the other perforated gun head directly faces the ventilation hole on the fixed part, so that another reagent can be further pipette, as a result, the efficiency of the pipette is high, correct operation is ensured, thus guaranteeing the safety, reliability and quickness in experiments.

Description

technical field [0001] The invention relates to a pipette gun, in particular to a pipette gun for rotating and replacing pipette heads, and belongs to the technical field of design and manufacture of test instruments. Background technique [0002] A pipette is a commonly used instrument in biological experiments, through which the experimental liquid can be transferred from one vessel to another. In order to avoid mutual contamination of reagents and affect the experimental results, usually when using pipette guns to absorb different reagents in the experiment, it is necessary to use a corresponding pipette gun for each reagent, or replace and clean the pipette tip before using it. Too many liquid guns take up space and affect the operation. The latter is cumbersome to operate, which affects the progress of the experiment and work efficiency, and brings inconvenience to the experiment. Therefore it is necessary to improve the prior art. Contents of the invention [0003]...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the existing pipette gun needs to be equipped with a special pipette gun when absorbing different liquids, or the pipette gun is frequently cleaned and replaced, resulting in cumbersome operation and affecting the efficiency of the experiment, the present invention provides a rotatable replacement pipette head pipette gun

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