Lens fixing device for optical experiment

The utility model relates to the technical field of optical machinery. The utility model relates to a lens fixing device for optical experiments. An existing lens fixing device for an optical experiment is inconvenient to replace and adjust. Therefore, the fixing device is invented. The device comprises a base and a runner, wherein an outer baffle plate and an inner baffle block extend from the base; a containing groove is formed between the outer baffle and the inner check block. The bottom of the containing groove is rotationally connected with a driven wheel and a driven wheel. The outer edge of the rotating wheel extends to form a supporting block. The supporting block extends to form driving gear teeth engaged with the driven gear. the inner edge of the rotating wheel sleeves the outer edge of the inner stop block; a fixed annular plate is fixed to the inner check block, the inner edge of the rotating wheel is located below the lower fixed annular plate, a toothed bar is arrangedon the base, and a clampi