Closed-Loop Mask Headgear for Low-Contact Seal Stability
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Solution Overview
Problem
Existing respiratory mask systems face challenges in maintaining a stable and airtight seal, particularly due to the reduced contact area with the user's face, which can lead to leaks and reduced effectiveness of respiratory therapies like CPAP.
Innovation Solution
The development of a headgear for respiratory masks featuring an integrally formed closed loop design, comprising a yoke, side arms, and a top strap, which provides enhanced support and stability to the patient interface, maintaining a secure seal despite the reduced contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the mask contact area with the user's face is reduced, then the comfort and aesthetics of the mask are improved, but the seal stability deteriorates leading to leaks
Solution Approach 1:
The headgear is divided into multiple functional segments: a closed loop structure (yoke + side arms + top strap) for primary seal maintenance, and a separate rear strap for additional stabilization. This segmentation allows the reduced-contact mask to receive focused support where needed without requiring broad facial contact.
Solution Approach 2:
The headgear transitions from traditional multi-strap configurations to a three-dimensional closed loop structure that distributes support forces across multiple spatial dimensions (vertical, lateral, and posterior), compensating for the reduced two-dimensional contact area of the mask.
2Reliability
If the headgear provides strong support to maintain the seal, then the seal stability is improved, but the comfort of the headgear deteriorates due to increased pressure on the user's head
Solution Approach 1:
The closed loop headgear distributes support forces across three-dimensional space by engaging the yoke, side arms, and top strap simultaneously, spreading the required support load across multiple contact points on the user's head rather than concentrating pressure in one area.
Solution Approach 2:
The headgear incorporates flexible components including the top strap and rear strap that can adapt to the contours of the user's head, distributing pressure more evenly and comfortably while maintaining the necessary support force for seal stability.
3Reliability
If the headgear structure is made more complex to maintain stability with reduced mask contact, then the seal stability is improved, but the device complexity increases
Solution Approach 1:
The yoke, side arms, and top strap are merged into an integrally formed closed loop structure, combining multiple support functions into a single unified component that reduces the number of separate parts while maintaining comprehensive seal support.
Solution Approach 2:
The closed loop headgear structure performs multiple functions simultaneously: the yoke provides anterior support, the side arms provide lateral stability, and the top strap provides posterior anchoring, all within a single integrated design that also includes a removable rear strap for additional customization.
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.