Positioning printing structure for handheld printer

The utility model relates to the technical field of handheld printers, in particular to a positioning printing structure for a handheld printer. According to the technical scheme, the printer comprises a printer body and an upper cover rotationally connected to the upper end of the printer body, a paper outlet is formed in the upper end of the printer body, a selenium drum is arranged on the inner side of the upper cover, two guide plates located on the two sides of the paper outlet respectively are connected to the upper end of the printer body, and a positioning guide assembly comprises sliding grooves formed in the side faces of the two guide plates; and supporting blocks are slidably connected into the two sliding grooves correspondingly, rotating blocks are rotatably connected to the inner sides of the two supporting blocks correspondingly, the inner surfaces of the two rotating blocks are jointly connected with a U-shaped plate, a guiding plate is arranged on the inner side of the U-shaped plate, and a