Tensile Strand with Segmented Cross-Sections for Footwear Fit
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Solution Overview
Problem
Conventional closure systems for footwear often lack sufficient adjustability and support, leading to discomfort and inadequate fit for various foot shapes and sizes.
Innovation Solution
The integration of tensile strands with varying cross-sectional profiles, including flat and rounded sections, coupled with a lace system and slotted eyelets, enhances adjustability and support by distributing pressure and accommodating different foot shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional closure systems are used, then the structure is simple, but the adjustability and support are insufficient
Solution Approach 1:
The tensile strand is divided into multiple segments with different cross-sectional profiles along its length. Some portions have rounded cross-sections while others have flattened cross-sections, allowing different portions to interact differently with the lace and footwear structure, thereby enhancing adjustability without requiring multiple separate components
Solution Approach 2:
Different portions of the tensile strand are given different local properties through varying cross-sectional profiles. The rounded portions provide smooth interaction and flexibility, while the flattened portions provide structural stability and lace engagement, allowing each local region to perform its specific function optimally
2Ease of operation
If conventional closure systems are used, then the structure is simple, but the comfort and support are insufficient
Solution Approach 1:
The tensile strand features localized variations in cross-sectional profile where rounded portions contact the foot for comfort, while flattened portions engage with the lace system for structural support. This local differentiation allows the single component to simultaneously provide both comfort and support functions
Solution Approach 2:
The tensile strand is segmented into comfort-providing rounded portions and support-providing flattened portions, allowing the system to deliver both comfort and structural integrity through a single integrated component rather than requiring multiple separate elements
3Stress or pressure
If uniform cross-sectional profile is used, then the manufacturing is simple, but the pressure distribution is inadequate
Solution Approach 1:
The tensile strand incorporates localized variations in cross-sectional profile along its length, with rounded portions positioned to contact the foot and flattened portions positioned to engage the lace system. This local differentiation enables optimized pressure distribution across different contact points without requiring complex manufacturing processes
Data Source
AI summary
An article of footwear includes a sole structure, an upper, and a tensile strand. The upper is coupled to the sole structure and has a medial portion, a lateral portion, an interior surface, and an exterior surface. The tensile strand has a first portion, a second portion, and a third portion disposed between the first and second portions. The first and second portions are disposed adjacent the interior surface of the upper and have a first cross-sectional profile that is flat. The third portion extends from the exterior surface of the upper and has a second cross-sectional profile that is rounded.