Decorative Light Wire Structure With Polymer Core Reinforcement
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Solution Overview
Problem
Existing decorative lighting wiring lacks sufficient mechanical strength and durability, often relying on oversized wires or complex non-conductive reinforcing strands that increase material costs and bulkiness, while also being aesthetically unappealing and difficult to manufacture.
Innovation Solution
The development of reinforced decorative lighting wires featuring a longitudinally-extending polymer reinforcing strand with conductor strands helically twisted around it, forming an asymmetrical shape, which provides enhanced tensile strength and elongation without the need for oversized wires or complex reinforcing strands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If oversized wires are used to increase mechanical strength, then tensile strength is improved, but material cost and wire bulkiness increase
Solution Approach 1:
The patent applies composite materials by combining a polymer reinforcing strand with copper conductor strands to create a wire that has both high tensile strength and appropriate electrical conductivity. The polymer strand provides mechanical strength while the copper strands provide electrical conductivity, eliminating the need to use oversized copper wires solely for strength purposes.
Solution Approach 2:
The wire is segmented into distinct functional components: a polymer reinforcing strand for mechanical strength and multiple copper conductor strands for electrical conductivity. This segmentation allows each component to be optimized for its specific function, with the polymer providing strength without adding excessive bulk or cost compared to using a single oversized copper wire.
2Strength
If complex non-conductive reinforcing strands are used to increase mechanical strength, then tensile strength is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the reinforcing strand and conductor strands into a single integrated wire structure. The polymer reinforcing strand and copper conductor strands are combined in a way that simplifies manufacturing compared to complex non-conductive reinforcing strands, while still providing the necessary mechanical strength. The helical arrangement of copper strands around the polymer core creates a unified structure that is both strong and manufacturable.
3Strength
If twisted-pair wire arrangement is used to increase mechanical strength, then overall wire strength is improved, but wire bulkiness and aesthetic appearance worsen
Solution Approach 1:
The patent uses a helical (curved) arrangement of copper conductor strands around the polymer reinforcing strand. This helical configuration provides mechanical strength through the curved geometry while maintaining a compact, uniform wire shape. The helical structure distributes stress more effectively than straight strands and creates a more aesthetically pleasing, uniform appearance compared to twisted-pair arrangements.
4Strength
If larger gauge wire is used to increase mechanical strength, then tensile strength is improved, but electrical conductivity efficiency decreases
Solution Approach 1:
The wire is segmented into multiple thin copper conductor strands rather than using a single large-gauge wire. This segmentation maintains high electrical conductivity efficiency because the total cross-sectional area of copper is optimized for conductivity while the polymer reinforcing strand provides the mechanical strength. Multiple smaller strands can be arranged to achieve both high conductivity and high strength without the bulk of a single oversized wire.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves superior tensile strength and elongation, reducing the risk of wire breakage and enhancing safety while maintaining a compact and aesthetically pleasing design, thus addressing the limitations of existing technologies.
Implementation Method 1
provides enhanced tensile strength and elongation
Implementation Method 2
conductor strands helically twisted around it
Data Source
AI summary
A decorative light string for draping on an external structure, comprising a plurality of decorative-lighting wires, each of the plurality of decorative-lighting wires including an outer insulation layer, one or more conductors, and one or more reinforcing strands; and a plurality of lamps electrically connected to one another by the plurality of decorative-lighting wires.