Helmet Liner Coupling for Gear Stability
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Solution Overview
Problem
Helmets with traditional rotational impact performance systems (RIPS) compromise the usability of helmets equipped with gear like Joint Helmet Mounted Cueing System (JHMCS) or night-vision goggles, as they allow excessive rotation relative to the wearer's head, reducing comfort and increasing strain during high-stress activities.
Innovation Solution
A helmet comfort liner coupler system that includes a base and plug configuration, allowing for interference fit with tubular members, preventing rotation in specific dimensions while allowing rotation in others, and featuring an elastically compressible latticed structure for improved comfort and gear stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional RIPS (rotational impact performance system) is used in the helmet, then the helmet can rotate in all dimensions relative to the wearer's head, but the usability of helmet-mounted equipment (such as JHMCS, HUDs, or night-vision goggles) is decreased due to excessive rotation
Solution Approach 1:
The comfort liner is designed with different functional zones: a first portion with high rotational resistance (using higher density foam or reinforcement structures) to prevent rotation in critical dimensions for equipment alignment, and a second portion with lower rotational resistance (using lower density foam) to allow rotation in non-critical dimensions for comfort and impact protection. This local differentiation resolves the contradiction by providing rotation control where needed while maintaining adaptability where possible.
2Ease of operation
If the comfort liner is made to prevent rotation in all dimensions, then equipment alignment is improved, but the helmet loses the ability to rotate for comfort and impact protection
Solution Approach 1:
The comfort liner incorporates spatially varying rotational resistance properties through different foam densities, structural reinforcements, or coupling mechanisms in specific regions. The first portion (e.g., frontal and rear regions) uses higher density foam or structural elements to resist rotation in dimensions critical for equipment alignment, while the second portion (e.g., lateral regions) uses lower density foam to permit rotation for comfort and impact protection.
3Ease of operation
If a rigid coupling structure is used to prevent rotation, then equipment stability is improved, but comfort and impact absorption are reduced
Solution Approach 1:
The comfort liner utilizes foam materials with spatially varying density parameters to achieve different mechanical properties in different regions. The first portion uses higher density foam with higher shear modulus to resist rotation and stabilize equipment, while the second portion uses lower density foam with lower shear modulus to absorb impact energy and provide comfort. This parameter differentiation allows the single comfort liner to simultaneously provide both rigid-like stability and flexible impact absorption.
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 comfort liner system effectively prevents helmet rotation relative to the wearer's head in critical dimensions, enhancing usability and reducing strain, while maintaining the positioning of mounted gear relative to the wearer's eyes, even under high-gravity conditions.
Implementation Method 1
The plug is preferably configured to engage in an interference fit with a female tubular member in the helmet
Implementation Method 2
featuring an elastically compressible latticed structure for improved comfort and gear stability
Data Source
AI summary
Embodiments are directed toward a helmet liner coupler for coupling a helmet liner in a helmet. The coupler preferably includes a base and a plug. The plug preferably extends away from the base. The plug is preferably configured to engage in an interference fit with a female tubular member in the helmet. The base is preferably configured to engage the helmet liner and thereby couple the helmet liner to the helmet.