Endoscope Bending Section Annular Ring Assembly Design

The patent removes rivets and other fastening parts from the annular ring structure. The annular rings are coupled to each other through direct abutment of their end faces, eliminating the need for external fastening components. This extraction of unnecessary parts increases component density and reduces outer diameter while maintaining structural integrity through the bulging part fulcrum mechanism.

The patent integrates the coupling function directly into the annular ring structure itself. The bulving parts of adjacent rings abut against each other to provide both mechanical coupling and rotation fulcrum functionality, merging multiple functions into the structural components themselves rather than requiring separate fastening elements.

The patent moves the wire guidance function from the radial dimension (protruding wire guides into the hollow) to the axial dimension (wire guides formed on the end faces of annular rings). Traction wires pass through holes in the end faces, utilizing the axial direction for wire passage while maintaining guidance functionality without encroaching on the radial hollow space.

The patent creates alternative wire guidance structures on the end faces of annular rings that replicate the guidance function without requiring radial protrusions. The wire guides are integrated into the ring structure itself, providing the necessary wire path definition while preserving the internal hollow volume for other components.

The patent completely eliminates fastening parts that project outward or inward from the annular rings. Instead, adjacent annular rings are directly coupled through abutment of their end faces. The bulving parts provide rotation fulcrums through their geometric shape alone, without requiring additional fastening elements, thereby minimizing the insertion section diameter.

The patent utilizes the flexibility and geometric properties of the thin annular ring structures themselves to provide mechanical coupling and rotation functionality. The bulving parts on the ring surfaces act as integrated fulcrums, allowing the thin-walled rings to function as both structural and mechanical elements without requiring thicker walls or additional fastening components.