Footwear Sole Structure with Segmented Haptic Elements
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Solution Overview
Problem
Conventional sole structures for footwear lack effective integration of haptic elements to provide differentiated hardness and proprioceptive feedback, which can enhance foot support and traction while walking.
Innovation Solution
A sole structure with a chassis featuring sockets for haptic elements of varying hardness, where these elements protrude through openings in the outsole to provide secondary traction regions and proprioceptive stimulation, enhancing foot support and ground engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional sole structures are used without integrated haptic elements, then the structure is simple and easy to manufacture, but they lack differentiated hardness and proprioceptive feedback for enhanced foot support and traction
Solution Approach 1:
The sole structure is segmented by integrating discrete haptic elements (protrusions) into the outsole, allowing different regions to have different hardness characteristics. This segmentation enables targeted proprioceptive feedback in specific foot regions while maintaining a relatively simple overall structure.
Solution Approach 2:
Haptic elements with varying hardness are strategically positioned in different regions of the outsole corresponding to key foot pressure points. This local quality variation provides differentiated tactile feedback and support where needed, while other regions maintain standard sole properties.
2Reliability
If haptic elements are integrated into the sole structure, then traction and foot support are enhanced through differentiated hardness, but the manufacturing process becomes more complex
Solution Approach 1:
The haptic elements are merged with the outsole structure, either as integral features molded during outsole production or as attached components. This integration ensures reliable foot support and traction while streamlining the manufacturing process by reducing the number of separate assembly steps.
3Adaptability or versatility
If multiple haptic elements of varying hardness are incorporated, then personalized foot support and ground engagement are improved, but the device complexity increases
Solution Approach 1:
The hardness parameter of haptic elements is varied across different regions of the outsole to match the specific support needs of different foot areas. This parameter change approach allows customized foot support without requiring a proportional increase in the number of elements, maintaining relative simplicity.
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
The solution provides improved proprioceptive feedback and traction by allowing haptic elements to interact with the ground, enhancing the overall walking experience through differentiated hardness and support in key foot regions.
Implementation Method 1
The midsole provides cushioning for the foot and may be partially formed from a polymer foam material that compresses resiliently under an applied load to cushion the foot by attenuating ground-reaction forces
Implementation Method 2
Each of the one or more haptic elements has a different hardness than the footbed
Implementation Method 3
One layer of the sole structure includes an outsole that provides abrasion-resistance and traction with the ground surface
Data Source
AI summary
A sole structure for an article of footwear includes a chassis including a footbed having an interior surface and an outer surface formed on an opposite side from the interior surface, the interior surface defining one or more sockets. The sole structure also includes one or more haptic elements each having a bottom surface received within a respective one of the one or more sockets and a top surface protruding from the interior surface of the chassis, each of the one or more haptic elements having a different hardness than the footbed.