Method of making snake bone device for endoscope

Abstract

The invention relates to a preparation method for a snake bone device of an endoscope. The snake bone device comprises a snake bone front pitch circle, a snake bone rear pitch circle, connecting pin rolls and a plurality of snake bone middle pitch circles connected between the front pitch circle and the rear pitch circle. The preparation method sequentially comprises the following specific preparation steps: selecting materials; cutting, leveling and polishing the snake bone front pitch circle, the snake bone middle pitch circles and the snake bone rear pitch circle; during shape cutting of the snake bone middle pitch circles and the snake bone rear pitch circle, respectively cutting out a clamping opening which is communicated with a connecting shaft hole, and the corresponding connecting shaft hole; processing and forming the connecting pin rolls by stainless steel wires on a lathe according to drawing requirements; stamping wire penetrating slot openings of the snake bone front pitch circle and the snake bone middle pitch circles by utilizing a special wire penetrating slot forming tool to form axial wire penetrating slots; assembling the snake bone front pitch circle with the snake bone middle pitch circles through the connecting pin roll by virtue of a special assembly tool, and assembling and connecting everytwo snake bone middle pitch circles, as well as the snake bone middle pitch circles and the snake bone rear pitch circle to form a final snake bone device by virtue of the same steps. The preparation method is reasonable in process; and the prepared snake bone does not need to rivet.

Description

technical field [0001] The invention relates to a method for preparing an accessory of a medical or industrial flexible endoscope, in particular to a method for preparing a snake bone device of an endoscope. Background technique [0002] When the existing endoscope realizes head bending and changing direction at a bending angle, the built-in snake bone bends it by pulling the steel wire rope connected with the snake bone. However, the snake bones in the prior art include the snake bone front segment ring, snake bone middle segment ring and snake bone rear segment ring sequentially connected by rivets. Due to the preparation method of this rivet riveting, the following defects are prone to occur, For example, first, if the axes of the riveting tooling and the rivet are not on the same axis or the riveting force is too large, it will cause deformation of the riveting part of the middle segment ring of the snake; second, during the riveting process, if the riveting pressure is ...

AI Technical Summary

Problems solved by technology

However, the snake bones in the prior art include the snake bone front segment ring, snake bone middle segment ring and snake bone rear segment ring sequentially connected by rivets. Due to the preparation method of this rivet riveting, the following defects are prone to occur, For example, first, if the axes of the riveting tooling and the rivet are not on the same axis or the riveting force is too large, it will cause deformation of the riveting part of the middle segment ring of the snake; second, during the riveting process, if the riveting pressure is too large , the surface of the workpiece is easily damaged or the rivet is deformed or the rivet head is cracked; third, the riveted workpiece is prone to not being riveted in place, or the riveting is not strong enough; therefore, the riveting process skills of workers The high requirements lead to low production efficiency, and it is also relatively easy to have unqualified riveting quality, and sometimes rivets will fall off, resulting in many defects in the final product and a high scrap rate, which makes the production cost higher.

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