Waterproof structure of endoscope

The utility model discloses an endoscope waterproof structure which comprises a data line, one end of the data line is fixedly provided with a lens connecting end, the outer side of the other end of the lens connecting end is provided with a thread groove, a filling sealing ring is embedded in the thread groove, the outer side of the lens connecting end is connected with a lens fixing end cover in a screwed mode, and the lens fixing end cover is provided with a sealing ring. A connecting thread is arranged on the inner wall of the end portion, connected with the lens connecting end, of the lens fixing end cover, and a lens is inserted into the lens fixing end cover. According to the utility model, the spiral filling sealing ring made of silica gel is installed in the thread groove, and the gas is filled in the gas inflation bin inside the filling sealing ring, so that when the lens fixing end cover is in spiral connection with the lens connecting end, the connecting thread extrudes the filling sealing ring, a