Snake bone device for endoscope

The invention relates to a snake bone device for an endoscope. The device comprises a snake bone front segment ring, a snake bone rear segment ring, multiple snake bone middle segment rings and connecting pin shafts, wherein the snake bone front segment ring and the snake bone rear segment ring are provided with a rear connecting lug and a front connecting lug respectively, and the rear connecting lug and the front connecting lug are provided with connecting shaft holes respectively; each snake bone middle segment ring is provided with a first connecting lug and a second connecting lug which are provided with connecting shaft holes, a clamping notch communicated with the corresponding first connecting shaft hole is formed in each first connecting lug, and the first connecting lug of one snake bone middle segment ring is connected with the second connecting lug of another snake bone middle segment ring through the corresponding connecting pin shaft; a front clamping notch communicated with the front connecting shaft hole is formed in the front connecting lug, the rear connecting lug is connected with the first connecting lug of the adjacent snake bone middle segment ring through the corresponding connecting shaft pin, the front connecting lug is connected with the second connecting lug of the adjacent snake bone middle segment ring through the corresponding connecting shaft pin, and axial threading grooves are formed in the inner walls of the snake bone front segment ring and the multiple snake bone middle segment rings respectively. According to the device, riveting is not needed, assembly is convenient, and production efficiency is high.