Rivetless snake bone assembly

Abstract

The invention discloses a rivetless snake bone assembly. The rivetless snake bone assembly comprises a front pitch circle, m front middle pitch circles, n rear middle pitch circles and a rear pitch circle which are successively connected; adjacent two pitch circles are connected through connecting pairs of hinge structures formed by cooperation of first connection parts and second connection parts; the second connection part of one of the pitch circles can be rotated relative to the first connection parts of adjacent connected pitch circles; two connection parts are symmetrically arranged in the connecting end of the same pitch circles and form a center of rotation, and one of the pitch circles can be rotated around the center of rotation at an angle relative to adjacent connected pitch circles, so that the rivetless snake bone assembly is bent; an included angle alpha between the end faces of the connecting ends of each of the pitch circles and axes of the pitch circles is formed, sothat the pitch circles form a spiral structure. According to the rivetless snake bone assembly, the boundary dimension of a bending section is minimized, and the space of an inner chamber is maximizedto provided convenience for build-in objects such as pliers catheter, light transmitting bundles, electric wires and the like to pass through.

Description

technical field [0001] The invention relates to an endoscope component, in particular to a rivetless snake bone assembly. Background technique [0002] An endoscope is a medical device widely used in clinical examination and diagnosis. In the process of modern medical diagnosis and treatment, people increasingly need endoscopes with smaller diameters and bending radii. The endoscope is bent and changed by pulling a plurality of snake bone joints connected with each other by a wire rope. In the existing endoscope, its snake bone joints are connected by rivets, and the bending direction is realized by pulling the steel wire rope. [0003] However, because the manufacturing and assembly process of rivet riveted joints is very complicated, the technical requirements for workers are high, and riveting defects are extremely prone to occur, so the production efficiency is low, the processing time is long, and the yield is low, resulting in high production costs. Especially for n...

AI Technical Summary

Problems solved by technology

[0003] However, because the manufacturing and assembly process of rivet riveted joints is very complicated, the technical requirements for workers are high, and riveting defects are extremely prone to occur, so the production efficiency is low, the processing time is long, and the yield rate is low, resulting in high production costs.

Especially for small-diameter endoscopes (the diameter is usually not greater than 1mm), it is extremely difficult to connect the snake joints with rivets.

And the use of rivets will also cause the following two problems: first, the rivet structure takes up valuable space in the inner cavity of the snake bone joint. Occupy, can not leave enough space for the contents of the clamp tube, light guide and wires; second, the rivet structure will increase the external dimensions of the curved part, and the increase in the external dimensions of the curved part will inevitably affect the endoscope. insertion performance

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