Four-Layer Sole Structure for Shock Absorption and Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shoes, particularly those used for outdoor activities, often fail to provide adequate comfort due to insufficient shock absorption and support, leading to fatigue and discomfort during prolonged use.
Innovation Solution
A sole structure comprising four layers with varying hardnesses, where the first layer is the hardest for support, the second layer is softer for impact absorption, the third layer provides additional stability, and the fourth layer is the softest for enhanced shock absorption, ensuring a balanced support and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer sole structure is used, then the manufacturing process is simple, but the shock absorption and support performance are insufficient
Solution Approach 1:
The sole is divided into four distinct layers (first layer, second layer, third layer, and fourth layer) with different hardness values. Each layer serves specific functions: the hardest first layer provides structural support, the softer second layer absorbs impact, the third layer provides additional stability, and the softest fourth layer enhances shock absorption. This segmentation resolves the contradiction by achieving superior shock absorption and support performance through multi-layer differentiation while maintaining manufacturing feasibility.
Solution Approach 2:
The invention uses composite material structure with four layers of different hardness values to create a sole that combines the advantages of both hard and soft materials. The composite structure allows the sole to simultaneously provide structural rigidity from harder layers and shock absorption from softer layers, resolving the contradiction between support performance and shock absorption capability.
2Stability of the object's composition
If harder materials are used for support, then structural stability is improved, but shock absorption capability deteriorates
Solution Approach 1:
Different regions of the sole (different layers) are assigned different hardness qualities based on their specific functional requirements. The first layer has the highest hardness for structural stability, while the fourth layer has the lowest hardness for shock absorption. This local differentiation of material properties resolves the contradiction by providing structural stability where needed while maintaining shock absorption capability in contact layers.
Solution Approach 2:
The invention transitions from a single-dimensional (single-layer) sole structure to a multi-dimensional (four-layer) structure with varying hardness values. This dimensional change allows the sole to simultaneously achieve structural stability through harder inner layers and shock absorption through softer outer layers, resolving the contradiction between these opposing requirements.
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 layered sole structure effectively reduces fatigue and discomfort by providing optimal shock absorption and support, enhancing the overall comfort of footwear during long-term use.
Implementation Method 1
A hardness of the first layer is greater than a hardness of the third layer, the hardness of the third layer is greater than a hardness of the second layer, and the hardness of the second layer is greater than a hardness of the fourth layer
Implementation Method 2
the second layer is softer for impact absorption
Data Source
AI summary
A sole includes a first layer, a second layer, a third layer, and a fourth layer stacked from bottom to top. A hardness of the first layer is greater than a hardness of the third layer, the hardness of the third layer is greater than a hardness of the second layer, and the hardness of the second layer is greater than a hardness of the fourth layer. A footwear having the sole is also provided.