Serpentine Heel Puck Footwear Midsole Design
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Solution Overview
Problem
Conventional footwear designs often fail to balance support, comfort, and performance effectively, particularly in children's footwear, where weight, durability, and aesthetic considerations are critical while maintaining energy absorption and stability.
Innovation Solution
The article of footwear features a midsole with a serpentine construction and an embedded outsole, utilizing a thermoplastic polyurethane (TPU) material for the midsole and a serpentine-shaped heel puck with pockets to provide flexibility, stability, and energy absorption, along with a separate forefoot and heel region design for tailored performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional footwear designs are used, then manufacturing simplicity is maintained, but the balance between support, comfort, and performance is inadequate
Solution Approach 1:
The sole structure is divided into a midsole and an outsole that are separable components. The midsole can be removed and replaced, allowing independent optimization of cushioning properties while maintaining a simple integrated outsole for durability and traction.
Solution Approach 2:
The midsole is designed with dynamic properties including varying durometer values (softer in heel region, medium in midfoot, harder in forefoot) and a curved geometry that promotes natural foot motion. The serpentine configuration allows the midsole to flex and adapt during different phases of gait.
2Weight of moving object
If lightweight materials are selected for performance enhancement, then athletic performance is improved, but durability and structural integrity may be compromised
Solution Approach 1:
Different regions of the footwear are assigned different material properties and weights. The midsole uses lightweight foam materials optimized for cushioning, while the outsole uses more durable, heavier materials for traction and wear resistance. The upper structure uses lightweight breathable materials in non-critical areas and more durable materials where needed.
Solution Approach 2:
The footwear combines multiple materials with complementary properties: lightweight foam for the midsole, durable rubber or thermoplastic for the outsole, and engineered fabrics for the upper. This composite approach achieves lightweight overall weight while maintaining durability in critical load-bearing and high-wear regions.
3Reliability
If the sole structure is separated into discrete regions for tailored performance, then energy absorption and support are improved, but manufacturing complexity increases
Solution Approach 1:
The sole is segmented into a removable midsole and a permanent outsole. This allows the midsole to be manufactured separately with optimized cushioning properties, then attached to the outsole through simple adhesive bonding or molding processes, combining tailored performance with manufacturing efficiency.
Solution Approach 2:
The midsole and outsole are combined into a functional assembly where the midsole is attached to the outsole bed. This merging provides the benefits of discrete region optimization while maintaining a unified sole structure that is relatively simple to manufacture and assemble.
4Weight of moving object
If children's footwear requirements are met with emphasis on weight and aesthetics, then comfort and style are improved, but energy absorption and stability may be insufficient
Solution Approach 1:
The midsole is designed with region-specific durometer values: softer material in the heel region for impact absorption during heel strike, medium density in the midfoot for arch support, and harder material in the forefoot for push-off stability. This localized variation provides comprehensive protection while maintaining lightweight construction.
Solution Approach 2:
The serpentine configuration and curved geometry of the midsole promote natural foot motion and pronation/supination cycles. This dynamic design allows the footwear to adapt to children's developing gait patterns while providing consistent energy absorption and stability throughout the gait cycle.
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
This design enhances comfort, durability, and performance by allowing for proper flexion and pronation, while maintaining a lightweight construction, suitable for children's footwear, and provides improved energy absorption and stability during various activities.
Implementation Method 1
a serpentine-shaped heel puck with pockets to provide flexibility, stability, and energy absorption
Implementation Method 2
utilizing a thermoplastic polyurethane (TPU) material for the midsole to provide flexibility, stability, and energy absorption
Data Source
AI summary
An article of footwear is provided and includes an upper structure having a heel portion and a forefoot portion and a plate attached to a bottom surface of the upper structure. A sole structure is attached to the plate and includes a first portion associated with the heel portion and a second portion associated with the forefoot portion. The first portion includes a wall formation having a continuous structure with a series of peaks disposed proximate to and in contact with the plate and a series of valleys cooperating with the peaks to define a plurality of pockets formed through the wall formation.