Wire Puller With Segmented Guide Wires For Flexible Navigation
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Solution Overview
Problem
Existing wire pullers face challenges in maintaining sufficient compressive and tensile strength while ensuring flexibility, especially in long narrow passages, due to the need for varying physical properties along the length, which complicates the extrusion molding process and results in lower yield and higher costs.
Innovation Solution
The design incorporates a first and second guide wire section with intertwisted guide wires, allowing for separate extrusion and partial intertwisting, enabling the manufacturer to choose suitable properties and simplify the processing requirements, thereby improving yield and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If different physical properties are provided to different segments of the wire puller to maintain flexibility and strength, then the structural strength and flexibility are improved, but the extrusion molding process becomes more complex and costly
Solution Approach 1:
The wire puller is divided into multiple segments with different physical properties. The first segment has a first outer diameter and the second segment has a second outer diameter different from the first. This segmentation allows each part to be optimized for its specific function while simplifying the overall manufacturing process by enabling separate extrusion of each segment.
Solution Approach 2:
Different segments of the wire puller are given different local qualities through varying outer diameters. The distal end segment has a smaller outer diameter to maintain flexibility for navigating pipes, while the proximal segment has a larger outer diameter to provide structural strength. This local differentiation resolves the contradiction by allowing each region to have the properties needed for its specific function.
2Ease of operation
If varying pitch of threads or elongation is applied to enhance flexibility of the distal end, then the flexibility is improved, but higher processing skills are required leading to lower yield and higher cost
Solution Approach 1:
The patent applies parameter changes by varying the outer diameter of different segments rather than varying thread pitch or elongation. This approach enhances flexibility through geometric parameter modification (different outer diameters) rather than through complex processing parameters like thread pitch variation. This simplifies the manufacturing process and improves yield by avoiding the need for higher processing skills.
Data Source
AI summary
A cord and a wire puller are used to pass through narrow pipes or the like. The cord includes a first guide wire section and a second guide wire section. The first guide wire section includes a plurality of first guide wires, and the first guide wire section has a first segment in which the first guide wires are intertwisted with each other. At least a part of the first guide wires extends from the first segment to a transitional segment. The second guide wire section includes a plurality of second guide wires, and the second guide wire section has a second segment in which the second guide wires are intertwisted with each other. At least a part of the second guide wires extends from the second segment to the transitional segment, in which the first and second guide wires are intertwisted with each other.