Chain-Linked Tensile Support Structure for Footwear Upper
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Solution Overview
Problem
Conventional articles of footwear lack effective distribution of tensile forces across the upper material, leading to inadequate support and comfort during ambulatory activities, as the material stretches unevenly, causing hot spots and improper foot positioning.
Innovation Solution
A chain-linked tensile support structure comprising a plurality of strands, such as filaments or fibers, arranged in a chain-link configuration across the upper, distributing tensile forces and conforming to the foot shape, thereby enhancing support and comfort by reducing material stretch and eliminating hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional upper material is used without tensile support structure, then the footwear is simpler in construction, but the material stretches unevenly causing hot spots and inadequate support
Solution Approach 1:
The upper is divided into a base layer and a separate tensile support structure with strands arranged in specific patterns (e.g., X-strap, T-strap configurations). This segmentation allows the support structure to be optimized independently for force distribution while maintaining overall structural integrity and reducing uneven material stretch.
Solution Approach 2:
The upper combines different material components: a base layer material and tensile support strands (which may be elastic or non-elastic). This composite construction integrates materials with complementary properties to achieve both support functionality and controlled elasticity, preventing hot spots while managing complexity.
2Object-affected harmful factors
If conventional upper material is used without tensile support structure, then the footwear construction is simpler, but tensile forces are not effectively distributed leading to hot spots
Solution Approach 1:
The tensile support structure is segmented into multiple strands arranged in specific geometric patterns (X-strap, T-strap, etc.). This segmentation distributes tensile forces across multiple load paths, preventing concentration of stress at single points and thereby eliminating hot spots on the foot.
Solution Approach 2:
The tensile support structure implements local quality variations by positioning strands at specific locations and orientations throughout the upper. Different regions have different strand densities and configurations tailored to local force requirements, optimizing force distribution and preventing hot spots in high-stress areas.
3Ease of operation
If conventional upper material is used, then the footwear is easier to manufacture, but the material stretches unevenly causing improper foot positioning
Solution Approach 1:
The upper is segmented into a base layer and an overlay tensile support structure with strands configured in specific patterns. This segmentation creates distinct functional zones that guide foot positioning through controlled elasticity and geometric constraints, improving positioning accuracy while allowing each layer to be manufactured separately.
Solution Approach 2:
The tensile support structure utilizes parameter variations in strand elasticity (elastic vs. non-elastic), strand orientation, and strand density to control foot positioning. These parameter changes create specific mechanical behaviors that guide the foot into proper position while maintaining manufacturability through standardized component fabrication.
Data Source
AI summary
Articles of footwear having an upper that includes a tensile support structure are described. The tensile support structure is formed by a plurality of strands that are arranged in a chain-linked configuration. The chain-linked arrangement of the strands assists with distributing tensile forces over portions of the upper of the article of footwear and helps to conforms the upper to a foot of a wearer upon the application of tension.