Lifting mechanism of POS machine display screen

The utility model discloses a lifting mechanism of a POS machine display screen, which can adjust the height of the cash register screen according to the heights of different cashiers and reduce the fatigue of a worker at an improper height. Specifically, the lifting mechanism comprises a lifting part and a rotating shaft part, and the display screen is installed on the rotating shaft part. The lifting part comprises a fixed plate and a sliding plate. The fixed plate is obliquely arranged on a support of the POS machine at a certain angle. The two sides of the sliding plate are bent by 90 degrees to form two opposite mounting side plates, a sliding rail is arranged on the outer side of each mounting side plate, an inner rail of each sliding rail is fixed to the corresponding mounting sideplate, and an outer rail of each sliding rail is fixed to the corresponding fixing plate. And the lower part of the rotating shaft part is clamped between the two mounting side plates and is mutuallylocked with the mounting s