Pivoting Retention Tab for One-Handed Strap Adjustment
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Solution Overview
Problem
Existing strap retaining devices for personal protective equipment, such as respirators, lack efficient mechanisms for quickly and easily adjusting strap length, often requiring complex manual operations or multiple steps, which can be cumbersome and inconvenient, especially for users wearing gloves or needing one-handed operation.
Innovation Solution
A strap retaining device featuring a frame with a pivotally connected retention tab and a first actuation arm comprising a movable ramp that shifts from a neutral to an actuated position, allowing the retention tab to move perpendicular to the actuation plane, facilitating easy adjustment of strap length by contacting an angled surface of the retention tab.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual strap adjustment mechanisms are used, then strap length can be adjusted, but the operation becomes complex and cumbersome
Solution Approach 1:
The retention tab is designed to dynamically transition between a retained position (engaging the strap) and a released position (allowing strap movement). The actuation arm enables this dynamic state change through a single motion, eliminating complex multi-step adjustment mechanisms while maintaining ease of operation.
Solution Approach 2:
The actuation arm moves in a first plane to cause the retention tab to move in a second plane that is substantially perpendicular to the first plane. This dimensional transformation allows a simple linear actuation motion to produce the complex retention/release action, reducing operational complexity while maintaining functionality.
2Productivity
If traditional buckles or retention devices are used, then strap length can be adjusted, but multiple steps or hands are required for operation
Solution Approach 1:
The adjustment mechanism is segmented into distinct functional components: the actuation arm for user input, the retention tab for strap engagement, and the frame for structural support. This segmentation allows each component to perform its specific function efficiently, enabling quick single-handed operation while maintaining operational simplicity.
Solution Approach 2:
The retention tab acts as an intermediary between the actuation arm and the strap. The actuation arm's motion in the first plane is transferred through the retention tab (which moves in the perpendicular second plane) to directly control strap retention, eliminating the need for multiple adjustment steps and enabling rapid single-handed operation.
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
Enables quick and easy adjustment of strap length with a simple, one-handed operation, allowing users to securely maintain or loosen the strap as needed, enhancing usability and convenience, particularly for users wearing gloves or requiring single-handed operation.
Implementation Method 1
the first actuation element is a ramp, and the first actuation element contacts an angled surface of the retention tab in the actuated position
Data Source
AI summary
A strap retaining device having an actuation arm that may engage a retaining tab is provided. In an exemplary embodiment, the strap retaining device includes a frame, a retention tab pivotally connected to the frame, and an actuation arm connected to the frame and having a first actuation element movable towards the retention tab from a neutral position to an actuated. The first actuation ramp is movable in a first plane to cause the retention tab to move in a second plane that is perpendicular to the first plane.