Novel manual mechanical pipettor

Abstract

The invention discloses a novel manual mechanical pipettor which comprises a pipettor body and a capacity adjusting assembly used for adjusting the stroke of a piston. The position monitoring module is used for acquiring a stroke signal of the piston; the conversion module is used for converting the piston stroke signal acquired by the position monitoring module into an electronic signal; the microprocessor module is used for performing data processing on the electronic signal to obtain a set capacity value; the information feedback module is used for feeding back the set capacity value to the user; and the power supply module is used for providing electric energy for the pipettor body. The pipettor provided by the invention provides friendly capacity reading display, control on set capacity precision, friendly calibration operation and a false touch reminding function.

Description

technical field [0001] The invention relates to the technical field of laboratory equipment, in particular to a novel manual mechanical pipette. Background technique [0002] Pipettes are mainly used for pipetting, dispensing and other operations of liquids. They are one of the most commonly used instruments in the laboratory, and are also one of the instruments that are most likely to affect the experimental results. At present, the commonly used pipettes are mainly manual mechanical pipettes, which are widely used because of their low price and simple use. The realization principle of the mechanical pipette is: by rotating the capacity adjustment knob, the piston stroke is changed to realize the adjustment of the pipetting capacity, and the piston stroke is related to the reading of the mechanical counting wheel through the mechanism. The reading of the counting wheel changes as the stroke changes. Since the traditional mechanical pipette itself is all composed of mechan...

AI Technical Summary

Problems solved by technology

The reading of its capacity is provided by the mechanical counter, which is limited to the volume of the mechanical pipette itself. Most of the mechanical counters have relatively small windows and low recognition of the numbers 0-9 provided, which leads to incorrect reading of the set capacity by the user. too easy;

[0004] 2. Pipetting accuracy and calibration issues

According to the design principle of the mechanical pipette, its pipetting accuracy has high requirements on the accuracy of the parts, materials, assembly, manufacturing, etc.; although the mechanical pipette also provides the calibration function, the calibration operation is more complicated, and the general operation process As follows: It is necessary to use a tool to separate the counting wheel from the stroke, so that the linkage between the piston rod and the adjustment wheel is cancelled, and then the reading of the mechanical counter is adjusted to be consistent with the actual pipetting volume to complete the calibration, and only one calibration point can be provided, so it cannot meet the full High accuracy requirements within the measuring range

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