Dual-Durometer Golf Shoe Midsole for Swing Stability and Comfort
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Solution Overview
Problem
Current golf shoe midsoles struggle to simultaneously provide sufficient rigidity for stability during a golf swing while maintaining flexibility and comfort for walking, as they are typically made of single-density foam that compromises between hardness and softness.
Innovation Solution
A dual durometer midsole design featuring a soft durometer from the heel to the forefoot region and a firm durometer around the heel perimeter, combined with stability inserts made of ethylene-vinyl acetate copolymer, to enhance stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-density foam midsole is used, then the structure is simple and easy to manufacture, but it cannot simultaneously provide sufficient support during high-load activities and comfort during low-load activities
Solution Approach 1:
The midsole is divided into multiple density layers: a softer lower layer for comfort during walking and a firmer upper layer for support during golf swings. This segmentation allows each layer to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different regions of the midsole have different foam densities tailored to local requirements. The heel area uses softer foam for cushioning, while the midfoot and forefoot areas use firmer foam for stability and support during weight shifts.
2Strength
If a harder sole is used, then support and stability are improved, but comfort and flexibility during walking are reduced
Solution Approach 1:
The midsole dynamically adapts its stiffness characteristics based on the activity being performed. During golf swings, the firmer upper layer engages to provide stability, while during walking, the softer lower layer engages to provide comfort, creating a dynamic response to different loading conditions.
Solution Approach 2:
The midsole uses composite construction combining different foam densities and potentially different material properties in a single component. This allows the structure to exhibit both rigid and flexible characteristics simultaneously, resolving the contradiction between support and comfort.
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 dual durometer midsole design provides enhanced stability during swinging and improved comfort while walking, allowing for weight shifts without sacrificing flexibility.
Implementation Method 1
The midsoles of footwear are known to strongly affect the sensation of cushioning/comfort by redistributing load magnitudes and rates on the bony load-bearing structures and soft tissues of the foot
Implementation Method 2
a soft durometer positioned from the heel region to the forefoot region
Implementation Method 3
a firm durometer positioned around the heel perimeter
Data Source
AI summary
An article of footwear comprising an upper, a sole assembly, and an A-shaped support frame extending over the upper. The A-shaped support frame may comprise a first leg extending to the heel region and a second leg extending to the midfoot region. The first leg and the second leg may be disposed at an angle to form an opening in the A-shaped support frame.