Elastically Deformable Braided String with Variable Tensile Moduli
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Solution Overview
Problem
Traditional braided strings with many knob parts for elastic deformation are cumbersome to set and adjust, as all knob parts must be released and reinserted, and they cannot change tension at specific locations, also appearing unsightly when used as shoelaces.
Innovation Solution
A braided string with an intermediate part that can elastically deform in various ways by dividing it into areas with different tensile moduli, manufactured by weaving non-stretchable and rubber yarns at varying speeds to create areas of lower and higher tensile moduli, eliminating the need for knob parts and allowing customizable tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If many knob parts are placed at appropriate intervals in the direction of axis, then the string can be set and maintained in a set state, but the initial string setting becomes tedious and changing the set state becomes cumbersome
Solution Approach 1:
The patent removes the knob parts from the string structure entirely. Instead of having multiple knob parts that need to be inserted and adjusted, the string uses a continuous elastic structure that can be simply inserted through holes and maintains tension automatically through its elastic properties, eliminating the tedious adjustment process
Solution Approach 2:
The patent changes the tensile modulus parameter along the length of the string, creating areas with different tensile moduli. This allows different sections of the string to have different elastic characteristics, enabling easy adjustment of tension at specific locations without requiring multiple knob parts
2Device complexity
If all knob parts have the same tensile modulus, then the structure is simple, but the tension cannot be changed at a given setting location
Solution Approach 1:
The patent applies local quality by creating areas with different tensile moduli at specific locations along the string. This allows different sections to have different elastic properties, enabling localized tension adjustment while maintaining an otherwise simple continuous structure without knob parts
3Ease of operation
If many knob parts are placed over the entire length of the braided string, then the string can be set and adjusted, but many knob parts appear on the shoe which is perceived as unsightly
Solution Approach 1:
The patent removes the knob parts that cause aesthetic issues while preserving the functional benefits through a continuous elastic string structure that maintains tension without visible adjustment components on the shoe surface
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
Enables easy setting and adjustment of tension without cumbersome operations, improves aesthetics by removing visible knob parts, and allows for tailored tension distribution, enhancing user comfort and appearance.
Implementation Method 1
the intermediate part excluding both the left and right end areas can deform elastically in the direction of axis under an external pulling force
Data Source
AI summary
An elastically deformable braided string whose intermediate part excluding both end areas can deform elastically in the direction of axis under an external pulling force, wherein the intermediate part is divided into/constituted by multiple areas having different tensile moduli in the direction of axis. The above elastically deformable braided string can be applied for various purposes.