Patient Interface Headgear With Rail-Guided Strap Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing patient interface headgear straps are difficult to adjust accurately and securely, leading to poor fit and seal, which can compromise respiratory therapy effectiveness and user comfort.
Innovation Solution
A strap assembly with a slide member and rail system that allows for fine-tuned adjustment, featuring a fixedly attached slide member and elongate flexible strap with a rail, enhancing stability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hook-and-loop fasteners are used for strap adjustment, then the headgear can be adjusted to fit different users, but the adjustment process becomes difficult and time-consuming
Solution Approach 1:
The strap assembly is divided into distinct components: a fixed attachment portion, an adjustable portion with rail, and a movable slide member. This segmentation allows the adjustment mechanism to be isolated and optimized independently, enabling smooth sliding adjustment without the complexity of hook-and-loop fasteners while maintaining adaptability to different user sizes.
Solution Approach 2:
The adjustment mechanism transitions from static hook-and-loop fastening to dynamic sliding adjustment. The slide member can move continuously along the rail to provide real-time length adjustment, and can be locked in position using a tab mechanism. This dynamic system improves ease of operation while maintaining versatility for different users.
2Manufacturing precision
If fine motor tasks are required in hard-to-reach regions, then strap alignment can be adjusted, but the operation becomes difficult for some individuals
Solution Approach 1:
The slide member acts as an intermediary between the user's hand and the strap alignment function. Instead of requiring direct manipulation of the strap end or complex fastening operations, the user simply grasps the slide member and slides it along the rail. This intermediary design simplifies the motor task while maintaining precise alignment capability through the rail's guidance.
3Adaptability or versatility
If the strap uses removable fasteners for adjustment, then the strap can be adjusted, but the strap may unthread and come loose
Solution Approach 1:
The adjustment mechanism uses a nested structure where the slide member contains a tab that fits within a corresponding recess in the rail. This nested design prevents the slide member from detaching completely while allowing it to slide along the rail for adjustment. The tab-recess engagement ensures the strap remains securely threaded while maintaining full adjustability.
4Reliability
If the headgear requires precise alignment and secure attachment, then the seal quality improves, but the adjustment process becomes more complex
Solution Approach 1:
The invention changes the fundamental parameter of adjustment from discrete hook-and-loop engagement to continuous positional adjustment along a rail. The slide member can be positioned at any location along the rail length, providing fine-grained control over strap length and headgear fit. This continuous parameter adjustment achieves precise alignment for optimal seal quality while the simple sliding motion keeps the mechanism relatively low-complexity.
Data Source
Figure 1~2
Figure 3(i)~4
Figure 5(i)~6(ii)
AI summary
Headgear for a respiratory interface has a strap assembly with an elongate flexible strap, a rail extending longitudinally along a rail portion of the strap, and a slide member having a channel that receives the rail. The slide member is attached to an attachment portion of the flexible strap and slidable along the rail to adjust the length of the strap assembly.