Micropipettor

Abstract

The invention relates to the technical field of experimental instruments, and discloses a micropipettor which comprises a gun body, a slotted hole is formed in the middle of the gun body, a sleeve isintegrally formed below the gun body, the lower portion of the sleeve is movably sleeved with a gun head, and the middle of the gun body is movably sleeved with a piston matched with the slotted hole.A bumping post movably sleeves the middle part of the top of the gun body and the piston; and a pressure spring movably sleeves the outer surface of the piston and is matched with the slotted hole. According to the micropipettor, the pipetting amount is controlled through the rotary piston, the downward pressing distance of the compression sleeve is directly converted into the suction amount of the gun head, namely the compression storage capacity of the compression spring is the suction amount of the gun head, and the elastic force of the compression spring can directly act on the extensionsleeve through cooperation of the extension sleeve and the compression sleeve, the extension sleeve moves upwards to drive the piston to move upwards for suction, the process that in the prior art, after the pipetting amount value is adjusted, downward pressing is still needed for energy storage for liquid suction is changed, and the operation steps of workers are simplified.

Description

technical field [0001] The invention relates to the technical field of test instruments, in particular to a micropipette. Background technique [0002] Micropipettes are commonly used experimental instruments in many disciplines, especially in physical qualitative and quantitative testing experiments. The precision of the detection test is high, and it is necessary to ensure that the micropipette can draw accurately. [0003] The existing micropipette first needs to turn the adjustment knob of the pipette. Turning the knob counterclockwise can increase the set liquid volume, and turning the knob clockwise can reduce the liquid volume. On the sleeve of the injector, apply a little pressure so that there is no air gap between the sleeve and the sleeve, press the button, hold the injector vertically, make the suction head immerse 3-5 mm below the liquid surface, then release the button slowly and steadily, and inhale Liquid, attach the nozzle to the bottom of the inner wall of...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a micropipette, which has the advantages of simple operation steps, good sealing of the gun head installation, and no retention of liquid released from the gun head, which solves the need to press down the energy storage step after adjusting the value of the suction volume. After a long time of use, the pipette head has a problem that the suction volume of the gap is inaccurate, and at the same time, it needs two steps of pressing down to completely discharge the solution during the liquid discharge process.

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