Footwear Midsole Arcuate Inserts for Lateral Stability
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Solution Overview
Problem
Conventional midsoles in footwear provide uniform cushioning and support for various activities, including walking, running, and banking, which can lead to inadequate stability and support during side-to-side movements, as they do not differentiate between vertical and lateral forces.
Innovation Solution
Incorporating arcuate recesses and inserts in the midsole, which provide unique structural support and cushioning properties, allowing for optimized performance during banking movements by varying the degree of cushioning and support based on the direction of force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform cushioning is provided throughout the midsole for all activities, then vertical cushioning comfort is maintained, but stability and support during side-to-side banking movements deteriorate
Solution Approach 1:
The midsole is divided into different regions with different cushioning properties: a first region with higher cushioning for vertical forces and a second region with lower cushioning for lateral forces. This local differentiation allows the footwear to provide appropriate support for different types of movements - soft cushioning for impact absorption during walking/running, and firm support for stability during banking maneuvers.
Solution Approach 2:
The midsole structure is segmented into multiple functional zones rather than being uniform. The first and second regions are distinct segments with different material compositions or densities, allowing independent optimization of cushioning characteristics for vertical versus lateral force directions.
2Reliability
If the midsole is made softer to improve cushioning, then vertical impact absorption is enhanced, but stability during side-to-side movements deteriorates
Solution Approach 1:
Different regions of the midsole have different material properties: the first region uses softer material for impact absorption while the second region uses firmer material for lateral support. This resolves the contradiction by allowing the midsole to be soft where needed for cushioning and firm where needed for stability.
Solution Approach 2:
The midsole incorporates composite construction with different material compositions in different regions. The first region may use a softer foam material while the second region uses a denser or more rigid material, creating a composite structure that simultaneously provides both cushioning and support.
3Stability of the object's composition
If the midsole is made firmer to improve stability during banking, then support for side-to-side movements is enhanced, but cushioning for vertical forces deteriorates
Solution Approach 1:
The midsole provides firm support in the second region for banking stability while maintaining soft cushioning in the first region for vertical impact absorption. This localized quality differentiation resolves the contradiction between needing firmness for stability and softness for cushioning.
4Reliability
If the same level of cushioning is provided throughout the entire range of use, then consistent comfort is maintained, but performance optimization for specific activities deteriorates
Solution Approach 1:
The midsole is optimized for different activities in different regions: the first region provides enhanced cushioning for impact-heavy activities like running, while the second region provides firmer support for stability-critical activities like basketball or tennis banking maneuvers. This allows the single footwear to be optimized for multiple activity types.
Solution Approach 2:
The midsole structure dynamically responds to different force directions applied during various activities. The different regional properties allow the footwear to adapt its response characteristics based on whether the applied force is vertical or lateral, optimizing performance for the specific activity being performed.
Data Source
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AI summary
An article of footwear (10) may include an upper (20) and a sole structure (30) secured to the upper, the sole structure including a midsole (31) with an outsole (32) secured thereto, wherein one or more arcuate inserts within recesses (50; 56) or cavities extending into the midsole are exposed through one or more apertures (40; 46) in the outsole. These inserts provide unique cushioning and support properties, particularly during "banking" (e.g., leaning to one side or pushing off to the side from the medial or lateral side of the foot). The inserts provide the structural benefits of dome or arch shapes that are formed in the mid-sole and open to the underside.