Porous EVA Waist Padding Assembly for Breathable Force Distribution
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Solution Overview
Problem
Traditional waist padding assemblies in harnesses lack effective force distribution, breathability, and ergonomic support, leading to discomfort during extended use due to uneven force distribution and poor ventilation.
Innovation Solution
A waist padding assembly comprising a center portion made of porous ethylene-vinyl acetate (EVA) material with ventilation holes, combined with polyurethane foam side portions and optional 3D spacer fabric and warp mesh materials for improved breathability and support, along with a backplate and edge covers for enhanced ergonomics and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional single-material waist padding is used, then the structure is simple, but force distribution is ineffective
Solution Approach 1:
The waist padding is divided into multiple zones with different materials: a center portion made of compliant material (e.g., foam) for force distribution, and side portions made of less compliant material (e.g., rigid foam or plastic) for structural support. This segmentation allows each zone to perform its specific function optimally, improving overall force distribution while maintaining manageable structural complexity.
Solution Approach 2:
Different regions of the waist padding are assigned different material properties tailored to local requirements. The center portion uses softer, more compliant material to distribute pressure evenly across the lumbar area, while the side portions use harder, more rigid material to maintain harness geometry and provide lateral support. This local differentiation of material quality optimizes force distribution throughout the padding structure.
2Object-affected harmful factors
If traditional solid waist padding is used, then the structure is simple, but breathability is poor
Solution Approach 1:
The waist padding incorporates porous or perforated materials that allow air circulation through the padding structure. These porous sections are strategically positioned to provide ventilation channels while maintaining the structural integrity and force distribution functions of the padding. The porosity enables breathability without significantly complicating the overall design.
3Ease of operation
If traditional waist padding is used, then the material selection is simple, but ergonomic support is insufficient
Solution Approach 1:
The waist padding design incorporates dynamic characteristics through the combination of compliant and less compliant materials. The compliant center portion allows for dynamic adaptation to the user's body contours and movement, providing ergonomic support that moves with the user. The less compliant side portions provide stable structural support. This dynamic combination enhances ergonomic performance while keeping the assembly process manageable through standardized components.
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 solution provides improved force distribution, increased breathability, and ergonomic support, reducing discomfort and pressure points, allowing for better wearability and long-term comfort during extended use.
Implementation Method 1
The center portion may comprise a porous ethylene-vinyl acetate (EVA) material... the plurality of holes may be configured to assist in the breathability of the center portion
Data Source
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AI summary
Various devices, assemblies, components, systems, and methods are provided relating to a waist padding assembly. An example assembly may include a center portion and two side portions. The center portion may comprise a porous ethylene-vinyl acetate (EVA) material and configured to contact a back of a user. The center portion may further comprise a warp mesh material and a 3D spacer fabric. The EVA material may comprise a plurality of holes to assist with the breathability of a waist padding assembly. The two side portions may be configured to secure to respective opposite sides of the center portion. The two side portions may comprise a polyurethane foam material configured to contact the flanks of the user.