Anti-suck-back electronic pipettor

Abstract

The invention discloses an anti-suck-back electronic pipettor, which comprises a pipettor main body with a hollow structure, a controller arranged at the upper part of the pipettor main body, a pipetting head arranged at the lower part of the pipettor main body and communicated with the pipettor main body, and an electromagnetic valve device arranged at one side of the pipetting head. A piston cylinder, a piston rod assembly, a linkage assembly and a screw transmission assembly are sequentially arranged in the pipettor main body from the pipetting head end to the other end. The screw transmission assembly is in transmission connection with the piston rod assembly through the linkage assembly, and one end of the piston rod assembly extends into a piston cylinder and can be driven by the screw transmission assembly to move along the piston cylinder. The other end of the piston cylinder is communicated with the pipetting head. The pipettor is reasonable in structure and convenient to use,liquid can be prevented from being sucked back to corrode the pipettor by the aid of the electromagnetic valve device, influence of inertia of the motor on pipetting volume can be eliminated, and thepipetting precision can be improved.

Description

technical field [0001] The invention relates to the field of pipettes, in particular to an electronic pipette for preventing sucking back. Background technique [0002] Conventional electronic pipettes have inertia in the rotating shaft after the motor is powered off. After the power is cut off, the motor continues to work under the action of inertia, and the internal piston continues to move backwards, which is easy to cause liquid to suck back and corrode the pipette. It will lead to a great reduction in the working efficiency and accuracy of the instrument. At the same time, under the inertia of the motor after the power is cut off, more liquid is often sucked out, making it difficult to accurately draw the target pipetting volume. Therefore, there is an urgent need for an electronic pipette that prevents sucking back and improves accuracy. Contents of the invention [0003] In order to solve the above technical problems, the technical solution provided by the present...

AI Technical Summary

Problems solved by technology

[0002] Conventional electronic pipettes have inertia in the rotating shaft after the motor is powered off. After the power is cut off, the motor continues to work under the action of inertia, and the internal piston continues to move backwards, which is easy to cause liquid to suck back and corrode the pipette. It will lead to a great reduction in the working efficiency and accuracy of the instrument.

At the same time, under the inertia of the motor after the power is cut off, more liquid is often sucked out, making it difficult to accurately draw the target pipetting volume

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