The utility model discloses a one-key maximum range
recovery type
pipette which comprises a liquid extraction cylinder, a
piston rod is movably inserted into the top of the liquid extraction cylinder, the bottom end of the
piston rod extends into a cylinder cavity in the inner side of the liquid extraction cylinder and is fixedly connected with a
piston block with the cross section of a square structure, and a handheld
handle is fixedly connected to the periphery of the top end of the liquid extraction cylinder. The top end of the liquid pumping cylinder is connected with the
piston rod through a driving structure, and the driving structure can enable the
piston rod to automatically move upwards and can complete wide-range
recovery of the
pipette; through the arrangement of the driving structure, when the
piston rod needs to move upwards, the gear b rotates by starting the
micro motor, so that the gear a drives the threaded
barrel to rotate, the piston rod drives the piston block to move upwards to the highest position, and the maximum
stroke of the liquid inlet amount of the inner side of the liquid pumping
barrel is recovered; therefore, the operator can better accept the method, and the method can be better executed.