Coaxial Cable Insulation Gap Structure for Medical Devices

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Reducing the diameter of coaxial cables for medical devices poses challenges as it can lead to conductor breakage under pressure and discontinuity in the foam insulation layer, resulting in incomplete foam formation.

Innovation Solution

A coaxial cable design featuring a central conductor wrapped with insulating twisted threads or strings, a cover layer, and an outer conductor, where the insulating elements are wound in a manner to create gaps, mimicking the function of a foam insulation layer without actual foam, using materials like fluorine resin and polyethylene terephthalate tape.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the diameter of coaxial cable is reduced, then the size of medical devices is reduced, but the conductor may be broken by pressure used to produce foams

Engineering Contradiction:

Improvediameter of coaxial cableVSAvoidconductor strength

Core Design Contradiction:

Volume of moving objectVSStrength

Solution Approach 1:

The patent removes the foam insulation layer entirely from the coaxial cable structure, extracting the problematic element that causes conductor breakage during foam production while maintaining the essential insulation function through alternative means (air gaps and insulating cover layer)

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent creates a porous structure using air gaps between the insulating twisted threads/strings and the cover layer, which provides insulation functionality without requiring foam material that would compromise conductor strength during manufacturing

Inventive Principle:

Principle #31Porous materials

2Volume of moving object

If the thickness of the foam insulation layer is reduced to reduce the diameter of coaxial cable, then the diameter is reduced, but continuity of resin during extrusion is broken, resulting in incomplete foam formation

Engineering Contradiction:

Improvediameter of coaxial cableVSAvoidinsulation layer continuity

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent segments the insulation structure into multiple discrete insulating twisted threads or strings wound around the central conductor, separated by air gaps. This segmentation eliminates the need for continuous foam extrusion, avoiding resin continuity issues while maintaining overall insulation functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an insulating cover layer as an intermediary element that wraps around the insulating twisted threads/strings, providing structural support and electrical insulation without requiring thick foam layers, thus enabling reduced cable diameter while maintaining insulation integrity

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10930416B2Coaxial cable and medical cable

Publication Date: 2021.02.23 PROTERIAL LTD

AI summary

A coaxial cable includes a central conductor, a plurality of insulating twisted threads or insulation strings wound therearound, each insulating twisted thread including a plurality of insulating strings twisted together, a cover layer provided around the insulating twisted threads or the insulation strings to form a gap to the insulating twisted threads or the insulation strings, and an outer conductor and a jacket provided on the outer periphery of the cover layer.