Segmented Sole Architecture for Flexibility and Arch Support
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Solution Overview
Problem
Existing athletic shoes either prioritize flexibility or support, failing to balance both effectively, leading to inadequate protection for injury-prone runners or those who engage in activities requiring both flexibility and arch support.
Innovation Solution
A segmented sole design with sipes radiating from a common origin, allowing the sole to bend orthogonally to the longitudinal axis, providing flexibility while supporting the arch and preventing overpronation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If shoe flexibility is increased, then freedom of movement and barefoot feeling are improved, but shoe supportiveness decreases
Solution Approach 1:
The outsole is divided into multiple segments separated by sipes (longitudinal grooves) that extend from the heel to the forefoot. These segments can move independently relative to each other, allowing the sole to flex and adapt to natural foot movement while maintaining structural support through the segmented architecture.
Solution Approach 2:
Different regions of the outsole are designed with varying degrees of flexibility and support characteristics. The sipes are strategically positioned to provide flexibility where needed while maintaining support in critical areas, creating localized functional zones that address both flexibility and support requirements simultaneously.
2Reliability
If arch support and shock absorption are increased, then injury prevention is improved, but shoe weight increases
Solution Approach 1:
The segmented outsole structure distributes shock absorption functions across multiple segments rather than relying on a single heavy support mechanism. Each segment contributes to shock absorption through its flexing action, collectively providing injury prevention without requiring excessive material or weight.
Solution Approach 2:
The sipes modify the mechanical parameters of the outsole by creating controlled flexibility zones. This changes the way the sole interacts with ground forces, providing shock absorption and arch support through geometric design rather than through heavy materials, thus maintaining weight efficiency while improving injury prevention.
3Adaptability or versatility
If shoe flexibility is increased, then adaptability to anatomical movement is improved, but stability and overpronation prevention decrease
Solution Approach 1:
The outsole is segmented into multiple sections separated by sipes that allow independent movement. This segmentation enables the sole to adapt to complex anatomical movements of the foot while the overall segmented structure maintains stability by distributing stresses across multiple segments, preventing excessive pronation through controlled flexibility rather than rigid restraint.
Solution Approach 2:
The sipes create dynamic flexibility zones that allow the outsole to adapt its rigidity based on applied forces. During normal movement, the segments flex to accommodate anatomical changes, but during activities requiring stability, the segmented structure provides resistance to excessive motion, creating a dynamic balance between adaptability and stability.
Data Source
AI summary
A segmented sole for an article of footwear comprises a forefoot region, a heel region, and a segmentation zone disposed between the forefoot and heel region. The segmentation zone includes a plurality of segments separated from each other and from the forefoot and heel by a plurality of sipes, cuts, or gaps. The segmented sole produces bending along a segmentation axis disposed along an arch of a wearer of an article of footwear including the sole, allowing for arch support and natural foot movement.