Footwear Upper Multi-Layer Load Transfer Design
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Solution Overview
Problem
Conventional footwear uppers fail to effectively transfer loads from the underfoot area to regions beyond the biteline, limiting comfort and performance.
Innovation Solution
The upper incorporates a multi-layer design comprising an inner layer for padding and support, a middle knit layer for around-the-foot support and elasticity, and an outer layer made of thermoplastic material that extends beyond the biteline to facilitate load transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-layer upper design is used, then the structure is simple, but load transfer from underfoot area to regions beyond the biteline is ineffective
Solution Approach 1:
The upper is divided into three distinct layers (inner layer, middle knit layer, outer layer), each with specific structural characteristics and functions. The inner layer provides foundational support, the middle knit layer adds elasticity and conformability, and the outer layer extends beyond the biteline to facilitate load transfer to midfoot and forefoot regions. This segmentation allows each layer to be optimized for its specific function while collectively achieving effective load transfer.
Solution Approach 2:
The upper combines different material types and structural properties across its three layers. The inner layer uses a specific material composition for basic support, the middle layer employs knit material for elasticity and comfort, and the outer layer uses materials optimized for load distribution. This composite structure enables the upper to simultaneously provide comfort, support, and effective load transfer to regions beyond the biteline.
2Reliability
If the outer layer extends beyond the biteline to midfoot or forefoot regions, then load transfer to regions beyond the biteline is improved, but the upper structure becomes more complex
Solution Approach 1:
The outer layer extends in the longitudinal dimension beyond the traditional biteline boundary, reaching into the midfoot and forefoot regions. This dimensional extension allows the upper to transfer loads not only vertically but also longitudinally across the foot, engaging additional foot regions for weight distribution and enhancing overall support and comfort during movement.
Data Source
AI summary
An upper for an article of footwear is disclosed. The upper can include a plurality of layers, such as an inner layer, a middle knit layer, and an outer layer. Each of the plurality of layers can provide different functionalities to the upper. The combination of the inner layer, middle knit layer, and the outer layer can be effective at transferring a load from the underfoot region to a position above the biteline.