Respiratory Interface Headgear With Variable Stretch for Secure Fit
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Solution Overview
Problem
Existing respiratory interface headgear lacks optimal adjustability and comfort, leading to suboptimal fit and ease of use during donning and doffing.
Innovation Solution
The headgear features multiple sections with varying levels of resilient extensibility, including a rear part, upper side straps, lower side straps, and a top strap, with distinct stretchability levels to enhance fit and ease of use, and incorporates hardstops and tabstops to prevent strap separation during donning and doffing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If headgear is made from uniform soft flexible material, then comfort is improved, but adjustability and secure fit are worsened
Solution Approach 1:
The headgear employs different materials with varying degrees of stretchability in different sections: the crown strap uses highly stretchable material for comfort during donning, the side straps use less stretchable material for secure positioning, and the forehead strap uses minimally stretchable material for stability. This local differentiation of material properties allows each section to perform its specific function optimally.
Solution Approach 2:
The headgear is divided into multiple independent strap sections (crown strap, side straps, forehead strap) that can be adjusted independently. Each section has distinct stretchability characteristics, allowing separate optimization for comfort and security in different regions of the headgear system.
2Ease of operation
If headgear straps are made fully stretchable, then ease of donning is improved, but stability and secure fit are worsened
Solution Approach 1:
The crown strap is designed with high stretchability to facilitate easy donning over the head, while the side straps and forehead strap use progressively less stretchable materials to ensure stable positioning and secure fit once the headgear is in place. This gradient of stretchability properties addresses both ease of donning and stability requirements.
Solution Approach 2:
The headgear transitions from a static uniform material design to a dynamic multi-level stretchability system where different sections have different degrees of elasticity. This allows the headgear to be dynamic during donning (high stretch in crown) and static during use (low stretch in side and forehead straps).
3Ease of manufacture
If headgear is made from single-material construction, then manufacturing simplicity is improved, but fit precision and comfort are worsened
Solution Approach 1:
The headgear is constructed from multiple separate strap sections rather than a single piece, allowing each section to be manufactured with optimal material properties for its specific function. This segmentation enables precise control over fit characteristics in different regions while maintaining relatively simple manufacturing processes for each individual component.
Solution Approach 2:
The headgear uses composite construction with different materials having varying stretchability properties in different sections. This allows the manufacturer to select optimal materials for each specific strap section, achieving superior overall fit precision through material composition rather than uniform material construction.
4Reliability
If headgear straps are made non-stretchable, then positional stability is improved, but ease of donning and accommodation of head sizes are worsened
Solution Approach 1:
The forehead strap uses minimally stretchable material to maintain precise positional stability and prevent slipping, while the crown and side straps use progressively more stretchable materials to accommodate variations in head size and shape. This local differentiation allows each section to address specific requirements.
Solution Approach 2:
The headgear system addresses size accommodation not through uniform stretching but through a multi-dimensional approach where different sections contribute differently to adaptability. The crown strap provides primary size accommodation through high stretch, while the forehead strap maintains dimensional stability, creating a multi-level adaptation system.
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 adjustability, ensuring a secure and comfortable fit, facilitating easy donning and doffing of respiratory interfaces by preventing strap separation and accommodating various head sizes.
Implementation Method 1
headgear for a respiratory interface, comprising: a rear part of the headgear, a pair of upper side straps, a pair of lower side straps, and a top strap, wherein the headgear comprises at least four different levels of resilient extensibility or stretchability in at least four different parts or straps of the headgear
Data Source
AI summary
Headgear for a respiratory interface has multiple separate sections of material joined to form the headgear and different levels of resilient extensibility or stretchability in at least four different parts or straps of the headgear. The multiple separate sections of material can include a rear part, a pair of upper side straps, a pair of lower side straps, and a top strap.