Closed Loop Headgear for Respiratory Mask Seal Stability
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Solution Overview
Problem
Existing respiratory mask systems face challenges in maintaining a stable and airtight seal during CPAP therapy, particularly due to the reduced contact area with the user's face, which can lead to leaks and discomfort.
Innovation Solution
The proposed respiratory mask system incorporates a headgear with an integrally formed closed loop design, featuring a yoke, side arms, and a top strap, made of semi-rigid material, to provide enhanced support and stability, ensuring a secure fit and minimizing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reduced contact area design is used for the respiratory mask, then comfort and ease of use are improved, but seal stability and airtightness deteriorate
Solution Approach 1:
The headgear is divided into multiple functional components (yoke, side arms, top strap, rear strap) that can be independently positioned and adjusted. This segmentation allows the mask to maintain minimal contact area for comfort while distributing the sealing function across multiple strategic points, preventing seal displacement without requiring large contact surfaces.
Solution Approach 2:
The headgear incorporates adjustable and movable elements including a detachable rear strap, adjustable top strap, and flexible side arms. These dynamic components allow the system to adapt to user movements and maintain seal stability through active adjustment rather than relying on a fixed, large contact area, thereby preserving comfort while ensuring reliability.
2Reliability
If a traditional headgear design is used, then seal stability is maintained, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Multiple headgear components (yoke, side arms, top strap, and rear strap) are merged into a single integrated assembly that functions as one cohesive unit. This merging reduces the number of separate parts and connection points, simplifying the overall structure while maintaining seal stability through the unified design that distributes support across the face and head.
Solution Approach 2:
The headgear design serves multiple functions simultaneously: the yoke provides structural support and attachment points, the side arms offer lateral stability, the top strap secures the mask to the head, and the rear strap prevents displacement. This multi-functionality eliminates the need for separate components for each function, reducing device complexity while ensuring reliable seal stability.
3Ease of manufacture
If an integrally formed closed loop headgear is used, then manufacturing ease is improved, but adaptability to different user faces may be reduced
Solution Approach 1:
The integrally formed closed loop headgear incorporates dynamic adjustment mechanisms including a detachable rear strap and adjustable top strap. These features allow the rigid closed loop structure to adapt to different face shapes and sizes, maintaining ease of manufacture through integral formation while achieving versatility through adjustable components that can be configured for various users.
Solution Approach 2:
The closed loop headgear is segmented into modular sections (yoke, side arms, top strap, rear strap) that can be independently adjusted or detached. This segmentation allows the integrally formed structure to accommodate different user faces by reconfiguring the segments, thereby maintaining manufacturing ease through integral formation while achieving adaptability through modular reconfiguration.
Data Source
AI summary
A respiratory mask system is provided. The respiratory mask system has a patient interface that is secured to a user's head by a headgear. The patient interface comprises a seal, a frame and a gas delivery conduit. The frame is configured to secure the seal and gas delivery conduit together. The frame comprises a recessed channel and/or headgear retaining features configured to connect the headgear to the patient interface. The frame can include an inlet collar that connects to a gas delivery conduit. The inlet collar can include bias flow holes. The headgear comprises a top strap, a pair of side arms, a yoke and a rear strap. The yoke is configured to connect to the recessed channel of the frame. The top strap, side arms and yoke form an integrally formed closed loop. The top strap can include two portions adjustably connected to each other.