Integrated Footwear Support System for Lateral Stability
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Solution Overview
Problem
Athletic shoes experience discomfort and wear due to lateral forces causing misalignment of the foot within the shoe, leading to fatigue and uneven wear, particularly in the metatarsal region, as conventional designs lack adequate lateral and medial support.
Innovation Solution
The integration of support segments on the medial and lateral sides of the upper, which wrap around the midsole and are secured to its outer surface, using thermoplastic urethane material injection molding for enhanced durability and flexibility, forming a continuous ground-engaging surface that provides additional support without restricting the wearer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional separate midsole and outsole components are used, then manufacturing is simpler, but lateral support and foot alignment are insufficient
Solution Approach 1:
The patent combines the midsole and outsole into a single integrated sole unit that is co-molded as one piece. This merging of components provides continuous lateral and medial support structures that prevent foot misalignment while eliminating the need for separate attachment processes between midsole and outsole.
Solution Approach 2:
The integrated sole is divided into functional zones including lateral support structures, medial support structures, and ground engaging portions with specific tread patterns. Each segment serves a specific function while being part of a unified structure that provides comprehensive foot support.
2Stability of the object's composition
If lateral and medial reinforcements are added to prevent foot misalignment, then foot alignment improves, but shoe weight and complexity increase
Solution Approach 1:
The patent implements support structures with varying densities and material properties in specific locations. The lateral and medial support structures have different characteristics than the central cushioning areas, providing targeted reinforcement only where needed for foot alignment while maintaining lightweight construction in other areas.
Solution Approach 2:
The integrated sole utilizes composite material construction combining different foam densities and material compositions within the same sole unit. This allows lateral and medial support structures to have enhanced structural properties without proportionally increasing overall shoe weight, as other areas use lighter materials.
3Strength
If support structures are added to the upper, then lateral support improves, but comfort and flexibility may be restricted
Solution Approach 1:
The support structures are designed with dynamic characteristics that allow them to be rigid when needed for stability during lateral movements, yet flexible during natural foot flexion and bending. The integrated sole incorporates flex zones and varying material densities that adapt to different movement requirements.
Solution Approach 2:
The lateral and medial support structures utilize flexible material constructions that can bend and conform to foot movements while maintaining their support function. The integrated sole design allows these support elements to flex with the foot rather than restricting natural motion.
4Reliability
If conventional glued and pressed assembly is used, then manufacturing is simpler, but durability and wear resistance decrease
Solution Approach 1:
The midsole and outsole are co-molded into a single integrated component, eliminating the need for separate gluing and pressing operations. This merging creates a permanent bond between what would otherwise be separate components, significantly improving durability and wear resistance while reducing assembly steps.
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
This design enhances foot alignment and comfort by providing lateral and medial support, reducing fatigue and wear, while allowing for independent flexure and improved cushioning, resembling a personal hydraulic system.
Implementation Method 1
The method may further include injection molding a thermoplastic urethane material on at least a portion of the support segment prior to attachment to the midsole
Implementation Method 2
The support segment is wrapped around at least a portion of the midsole. Finally, the free end of the support segment is secured to an outer surface of the midsole
Implementation Method 3
The primary function of the midsole is to provide cushioning to the wearer's foot, specifically in the heel and forefoot regions
Implementation Method 4
These lateral forces not only produce fatigue in the runner's foot, but also tend to stretch and wear the shoe, particularly in the metatarsal region
Data Source
AI summary
Articles of footwear having integrated support structures and methods for producing them. A support structure is formed by finger-like extensions of the upper material that are wrapped around at least the midfoot region of the outer surface of the midsole of the article of footwear to at least partially form a ground engaging surface of the article of footwear. The portions of the shoe upper that wrap around the midsole may have a layer of injected TPU material thereon to form an outsole of the article of footwear. Shoelace eyestays may extend through the top portion of the support structures so that when a wearer wishes to tighten the shoelaces, the entire support structure tightens around the periphery of the upper and sole of at least the midfoot region of the article of footwear.