Multi-layer EVA Helmet Padding for Concussion Mitigation
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Solution Overview
Problem
Conventional protective helmets, despite evolution, have not effectively reduced the incidence of concussions in sports and other activities due to inadequate energy absorption and increased forces from larger, more aggressive athletes.
Innovation Solution
A soft shell padded helmet with a multi-layer configuration, featuring pads made of heat-treated ethylene-vinyl acetate (EVA) layers of varying densities, providing enhanced shock absorption and comfort while conforming to the head shape, and a breathable, elastic shell for ventilation and light-weight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-layer padding is used in helmets, then the helmet structure is simple and lightweight, but the energy absorption capability is insufficient to reduce concussion risk
Solution Approach 1:
The padding is divided into multiple discrete layers (typically three layers) with different material properties and densities. Each layer serves a specific function in the energy absorption sequence, segmenting the impact mitigation task across multiple specialized components rather than relying on a single complex material
Solution Approach 2:
The helmet uses composite padding structures combining multiple materials with different characteristics (e.g., expanded polyethylene, foam materials, gel substances) in a layered configuration. This composite approach allows each material to contribute its unique properties to the overall impact absorption system
2Reliability
If thicker padding is added to improve protection, then impact absorption improves, but the helmet weight increases
Solution Approach 1:
Different layers of the padding are assigned different local qualities in terms of density, material composition, and thickness. The outer layers may be denser for initial impact resistance while inner layers are softer for comfort and residual energy absorption, optimizing protection without uniformly increasing weight throughout the entire padding structure
3Reliability
If dense padding material is used to improve protection, then shock absorption improves, but comfort and breathability deteriorate
Solution Approach 1:
The padding design transitions from a single-dimensional approach (one uniform material) to a multi-dimensional structure with multiple layers having different densities and properties. This dimensional change in the padding architecture allows simultaneous optimization of shock absorption (through denser outer layers) and comfort/breathability (through softer, more permeable inner layers)
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 multi-layer padded helmet effectively reduces the risk of head trauma by absorbing impact forces more efficiently than single-layer helmets, offering improved protection and comfort during athletic and other activities.
Implementation Method 1
The at least one pad comprising a multi-layer configuration... effectively reduces the risk of head trauma by absorbing impact forces more efficiently than single-layer helmets
Implementation Method 2
pads made of heat-treated ethylene-vinyl acetate (EVA) layers
Data Source
AI summary
The invention provides various embodiments of a soft shell padded helmet comprising a plurality of pads, wherein each pad is configured in a multi-layer configuration. The different embodiments comprise elements to provide a padded helmet that is light-weight and adapted to reduce the risk of head trauma due to the multi-layered padded configuration. The padded helmet comprises a top portion and a side portion, wherein the top portion is coupled to the side portion and each of the top and side portions comprise a plurality of pads.