Braided Shield Multi-Core Cable Structure to Suppress Sounding
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Solution Overview
Problem
Multi-core cables experience a phenomenon called sounding, where sounds occur due to twisting under applied forces, causing user discomfort.
Innovation Solution
A multi-core cable design featuring a core with stranded coated electric wires, a jacket, and a shield layer with a braided conductor made of metal wires having an outer diameter of 0.05 to 0.08 mm and a braiding density of 91% to 95%, with a braiding pitch of five to six times the core's outer diameter, which inhibits the shield layer from loosening during twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the shield layer is made with conventional braided conductor specifications, then the cable provides basic shielding and structural support, but the shield layer loosens during twisting causing sounding noise
Solution Approach 1:
The patent applies parameter changes by precisely controlling the outer diameter of metal wires (0.03mm to 0.06mm), braiding density (90% to 95%), and braiding pitch (4 to 6 times the core outer diameter). These parameter optimizations ensure the shield layer maintains sufficient friction with the core during twisting, preventing loosening and sounding noise while preserving shielding functionality.
Solution Approach 2:
The patent uses composite materials by combining metal wires with specific diameter ranges and high braiding density to create a braided conductor that provides both mechanical stability and electromagnetic shielding. The composite structure of tightly braided metal wires within the shield layer ensures simultaneous achievement of noise prevention and shielding effectiveness.
2Stability of the object's composition
If the braided conductor has high braiding density and specific wire diameter, then the shield layer maintains structural integrity during twisting, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific parameter ranges (braiding density: 90%-95%, wire diameter: 0.03mm-0.06mm, braiding pitch: 4-6 times core diameter) that balance manufacturing feasibility with structural stability. These optimized ranges enable manufacturers to achieve reliable shield layer performance without requiring extreme precision, making the solution practically implementable.
Data Source
AI summary
A multi-core cable includes: a core in which a plurality of coated electric wires are stranded; a jacket positioned outside the core; and a shield layer positioned between the core and the jacket. The shield layer includes a braided conductor in which metal wires are braided. An outer diameter of the metal wires is 0.05 mm or greater and 0.08 mm or less. A braiding density of the braided conductor is 91% or higher, and a braiding pitch of the braided conductor is five times or more and six times or less an outer diameter of the core.