Respirator Quick-Release Strap Mechanism
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Solution Overview
Problem
Existing respirators face challenges in providing a rapid and reliable method for securing, attaching, adjusting, and releasing the device to a user's face, especially in environments where quick donning and doffing are necessary.
Innovation Solution
The respirator design incorporates a quick-release actuator, combination straps with both elastic and inelastic portions, and a gasket to form a seal with the user's face. The straps are secured through a series of hooks and anchors, allowing for easy adjustment and secure fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional respirator straps are used without quick-release mechanism, then the respirator can be securely attached to the user's face, but the time required for donning and doffing is excessive
Solution Approach 1:
The strap system is segmented into modular components: elastic portions for stretching, inelastic portions for structural support, and distinct attachment points (hooks, anchors, guides). This segmentation allows the quick-release mechanism to operate on specific segments without affecting the entire strap system, enabling rapid donning and doffing while maintaining security.
Solution Approach 2:
The respirator incorporates dynamic elements including elastic straps that can stretch and retract, and a quick-release actuator that dynamically transitions between locked and unlocked states. The elastic portions allow the straps to adapt to different head sizes and movements, while the dynamic actuator enables rapid transition from secured to released state, reducing the time for donning and doffing.
2Adaptability or versatility
If elastic straps are used to secure the respirator, then the respirator can be easily adjusted to fit various head sizes, but the straps may become loose during use
Solution Approach 1:
Different portions of the strap system have different mechanical properties: elastic portions provide stretch and comfort for adaptability, while inelastic portions provide structural integrity and secure attachment. The local quality variation ensures that the elastic sections accommodate different head sizes while the inelastic sections with hooks and anchors maintain reliable security during use.
Solution Approach 2:
The strap system uses composite construction combining elastic materials (for stretch and comfort) with inelastic materials (for strength and security). This composite approach allows the respirator to be easily adjusted to fit various head sizes while preventing the straps from becoming loose during use, as the inelastic portions maintain constant tension and secure attachment.
3Reliability
If the gasket forms a tight seal with the user's face, then the gas-tight seal is achieved, but the comfort and wearability for extended periods is reduced
Solution Approach 1:
The gasket is constructed as a flexible thin film that can conform to the contours of the user's face, creating a gas-tight seal. The flexibility allows the gasket to adapt to facial movements and irregularities without requiring excessive pressure, thereby maintaining seal integrity while improving comfort and wearability for extended periods.
4Productivity
If the quick-release actuator is added to the respirator, then the donning and doffing speed is improved, but the device complexity increases
Solution Approach 1:
The quick-release actuator is designed to be operated by the user themselves without requiring tools or assistance. The actuator mechanism self-locks into place during donning and self-releases during doffing through simple user actions, enabling rapid donning and doffing while minimizing the complexity of the overall device.
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
This design enables quick and secure attachment and detachment of the respirator, forming a gas-tight seal that enhances user compliance and comfort, while allowing for efficient adjustment to fit various user head sizes and shapes.
Implementation Method 1
Combination straps have an elastic portion coupled to an inelastic portion (e.g., sewn together). The elastic portion secures the respirator to a user's face.
Implementation Method 2
The gasket is coupled to the body and facilitates the formation of a seal with a user's face forming internal airspace between the respirator and the user's face.
Implementation Method 3
The filter is positioned within the body to restrict air from transiting into the opening without also transiting the filter.
Implementation Method 4
The exhaust valve is coupled to the body. Air is permitted to flow through the exhaust valve in a first direction, which exits the internal airspace.
Data Source
AI summary
A tool, such as a respirator or gas mask, is provided. The respirator includes a body, a filter, an upper and lower strap, and a locking mechanism. The locking mechanism enables quick-release for fitting and/or adjusting the respirator on a user's head or face. In various embodiments, inelastic and elastic properties of the straps and/or a cord in the entwined region of the locking mechanism enhance the quick-release fit and adjustment of the locking mechanism.