Bent tube of endoscope

The utility model relates to the technical field of endoscope parts, in particular to an endoscope bent pipe which comprises a first pipe section, a second pipe section and a third pipe section, first hinge pieces are installed on the front edge and the rear edge of one end of the first pipe section, first hinge seats are installed on the front edge and the rear edge of the other end of the first pipe section, and the first hinge pieces are hinged to the first hinge seats. A second hinge seat is installed at the end, close to the first hinge piece, of the second pipe section, a second hinge piece is installed at the end, close to the first hinge seat, of the third pipe section, universal rotating rods are installed between the two ends of the first pipe section and the adjacent sides of the second pipe section and the third pipe section, and universal balls are arranged on the two sides of the universal rotating rods. The whole structure is simple, the corresponding number of pipe sections can be selected and