Ocular lens anti-falling structure of straight-tube stereoscopic microscope

The utility model discloses an eyepiece anti-drop structure of a straight-tube stereoscopic microscope, and relates to the technical field of microscopes. The focusing device comprises a focusing seat and an eyepiece seat provided with an eyepiece connecting cylinder, one end of the eyepiece connecting cylinder is connected with the eyepiece seat, the other end of the eyepiece connecting cylinder is sleeved in the focusing seat, the inner wall of one end, sleeved with the eyepiece connecting cylinder, of the focusing seat is provided with a first annular groove, and an elastic rubber gasket is arranged in the first annular groove. A second annular groove corresponding to the first annular groove in position is formed in the outer wall of the other end of the eyepiece connecting cylinder, and a plurality of arc-shaped protrusions clamped into the second annular groove are arranged on the inner annular wall of the elastic rubber gasket. Compared with the prior art, the utility model can solve the problem that t