Elastic Headphone Wire with Lubricated Core for Fatigue Resistance
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Solution Overview
Problem
Conventional metal wires used in headphones suffer from poor bending performance and short lifespan due to metal fatigue, leading to premature breakage from repeated bending.
Innovation Solution
Manufacturing elastic headphone wire by creating an elastic core wire, wrapping a conductive layer of enameled wires around it, and applying a transparent or translucent insulating protective layer with a lubricant, which enhances flexibility and extends the wire's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal wire is used for headphone cable, then electrical conductivity is good, but bending performance is poor and service life is short due to metal fatigue
Solution Approach 1:
The patent uses a composite structure consisting of an elastic core wire (rubber or silicone material) combined with a conductive layer (metal mesh or foil). This composite design allows the wire to maintain good electrical conductivity while the elastic core provides excellent bending performance and resistance to metal fatigue, thereby extending service life.
Solution Approach 2:
The patent employs a flexible elastic core wire made of rubber or silicone material that can be repeatedly bent without breaking. This flexible core replaces the traditional rigid metal wire structure, enabling the headphone cable to maintain both conductivity and high bending performance, thus resolving the contradiction between strength and reliability.
2Ease of operation
If elastic material is used for core wire, then flexibility and extension length are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for the elastic core wire, including hardness (40-60 Shore A), elongation at break (200-400%), and temperature resistance (-40°C to 80°C). By controlling these parameters within specific ranges, the patent achieves both high flexibility and consistent manufacturing quality, reducing the impact of precision requirements.
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 provides elastic headphone wires with improved flexibility, extended length, and increased service life, while the lubricant reduces wear and tear, and colored enameled wires create visually appealing patterns.
Implementation Method 1
the elastic insulating protective layer is coated with a lubricant disposed on an inner surface thereof
Implementation Method 2
using an injection molding machine to produce an elastic yarn as the elastic core wire of the elastic headphone
Data Source
AI summary
A method of manufacturing elastic headphone wire, having steps of: manufacturing an elastic core wire, weaving the conductive layer around an outer surface of the elastic core wire, and manufacturing an elastic insulating protective layer which sleeves on a periphery of the conductive layer to form the elastic headphone wire. The elastic headphone wire has excellent flexibility and longer extension length, extending the service life, and broadening the use way of the headphone wire.