Multijointed Bending Mechanism With Nested Manipulation Wires
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Solution Overview
Problem
Existing multijointed medical equipment with bending mechanisms cannot independently rotate individual bending pieces, making it difficult to achieve precise bending states and secure space for surgical instruments without wire entanglement.
Innovation Solution
A multijointed bending mechanism with multiple rotatable bending pieces connected by rotation shafts and manipulated by separate wires, allowing independent rotation of each piece and compact wire disposition to prevent entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple manipulation wires are disposed in the bending portion, then each bending piece can be independently rotated, but the wires become entangled and occupy excessive space
Solution Approach 1:
The patent implements nesting by arranging manipulation wires in concentric circles with different radii around the bending portion's central axis. Wires are disposed at multiple radial levels (first radius, second radius, third radius) rather than randomly distributed, creating a nested structure that prevents entanglement while maintaining independent controllability of each bending piece
Solution Approach 2:
The patent transitions from a two-dimensional planar arrangement of wires to a three-dimensional concentric circular arrangement with different radial distances from the central axis. This dimensional change allows multiple wires to be spatially separated in the radial direction while maintaining their functional independence, effectively preventing entanglement
2Adaptability or versatility
If bending pieces are connected in a simple sequence, then the structure is simple, but the bending portion cannot achieve complex bending configurations
Solution Approach 1:
The bending portion is segmented into multiple bending pieces (first, second, and third bending pieces) connected in series through rotation shafts. Each bending piece can be independently rotated around its rotation shaft, allowing the assembly to achieve complex three-dimensional bending configurations while maintaining a relatively simple modular structure
Solution Approach 2:
The patent introduces dynamic capability by making each bending piece rotatable around its rotation shaft, transforming a static simple sequence structure into a dynamic multi-degree-of-freedom system. This allows the bending portion to adapt to various complex configurations during surgical procedures
Data Source
AI summary
A multijointed bending mechanism having a first bending piece, a second bending piece connected to the first bending piece so as to be rotatable around a first rotation shaft, a third bending piece connected to the second bending piece so as to be rotatable around a second rotation shaft, at least two first wires connected to the first bending piece to rotate the first bending piece and at least two second wires connected to the second bending piece to rotate the second bending piece. The second wires are disposed inwards of the first wires with respect to a vertical direction of the first and second rotation shafts.