SCBA Lumbar Ring Adjustment for On-Body Fit Repositioning
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Solution Overview
Problem
In high-physical demand environments, improperly adjusted equipment, such as SCBA harness systems, can lead to chronic and acute injuries due to ill-fitting equipment, increasing the risk of wear and tear and entrapments in hazardous conditions.
Innovation Solution
A lumbar adjustment system for SCBA backpacks that allows users to adjust the lumbar support position without removing the equipment, utilizing a rotating ring member engaged with backplate grooves to move the lumbar plate vertically along the channel of the backplate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lumbar support position is adjusted by removing the SCBA equipment, then the adjustment can be performed, but the user must take off the equipment which reduces convenience and increases time loss
Solution Approach 1:
The lumbar support adjustment system enables the user to adjust the lumbar support position independently while the SCBA equipment remains worn. The rotating ring member with protrusions engages with the grooves on the backplate, allowing the user to rotate the ring to move the lumbar support to different positions without needing to remove the equipment. This self-service mechanism resolves the contradiction by making the adjustment process convenient and time-efficient.
2Adaptability or versatility
If the lumbar support position is fixed on the backplate, then the structure is simple, but the equipment cannot adapt to different user needs and environments
Solution Approach 1:
The lumbar adjustment system divides the lumbar support structure into separable components: the lumbar support, the rotating ring member with protrusions, and the backplate with grooves. The rotating ring member can rotate independently to engage with different grooves, enabling multiple fixed positions. This segmentation allows adaptability without excessive complexity, as each component has a specific function and the assembly remains mechanically simple.
Solution Approach 2:
The system transitions from a completely fixed lumbar support to a dynamically adjustable one. The rotating ring member introduces controlled mobility, allowing the lumbar support to be repositioned to different fixed locations along the backplate. This dynamic capability provides adaptability while maintaining structural simplicity through defined engagement points.
3Reliability
If the rotating ring member is directly engaged with backplate grooves, then the structure is simple, but the engagement may not be secure under heavy loads
Solution Approach 1:
The rotating ring member features a curved or rounded engagement surface that interfaces with the grooves on the backplate. This curvature allows for smooth engagement and disengagement while distributing loads more evenly across the contact points. The rounded geometry provides reliable mechanical engagement without requiring complex locking mechanisms, resolving the contradiction between reliability and simplicity.
Data Source
AI summary
A lumbar adjustment system for use in a self-contained breathing apparatus, the lumbar adjustment system having a rotating ring member operatively connecting a backplate to a lumbar plate, wherein the rotating ring member directly or indirectly engages with a locking notch and grooves in the backplate channel to allow adjustment of the lumbar plate relative to the backplate while the self-contained breathing apparatus is worn by a user.