Tool Lanyard Segmentation for Reliable Retraction
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Solution Overview
Problem
Conventional retractable lanyards require strong retraction mechanisms to handle heavy tools, making them difficult to extend and are heavy themselves, while also complicating the system when used with holsters to reduce retraction force.
Innovation Solution
A lanyard device with a housing attachable to clothing or a safety harness, featuring a flexible lanyard with a non-flexible portion that engages with a socket to prevent the tool from falling, allowing a weaker retraction mechanism and keeping the tool close by, with the socket and rigid portion bearing the tool's weight when engaged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong retraction mechanism is used to handle heavy tools, then the tool can be retracted reliably, but the lanyard becomes difficult to extend and heavier
Solution Approach 1:
The lanyard is divided into a flexible portion and a rigid portion. The rigid portion engages with the socket to provide structural support and bear the tool weight, while the flexible portion allows easy extension and retraction. This segmentation allows the retraction mechanism to be weaker since it only needs to retract the flexible portion, not overcome the full weight of the tool.
Solution Approach 2:
The rigid portion acts as an intermediary between the tool and the retraction mechanism. It transfers the tool weight to the socket when engaged, relieving the retraction mechanism from having to support the full weight, thus enabling easier extension and use of a lighter design.
2Reliability
If a strong retraction mechanism is used to handle heavy tools, then the tool can be retracted reliably, but the lanyard itself becomes heavier
Solution Approach 1:
By segmenting the lanyard into flexible and rigid portions, the retraction mechanism only needs to handle the lightweight flexible portion, not the entire lanyard weight plus tool weight. This allows for a much lighter overall lanyard design while maintaining reliable retraction of the flexible portion.
Solution Approach 2:
The rigid portion serves as a weight-bearing intermediary that transfers the tool load to the socket, allowing the retraction mechanism and lanyard to be significantly lighter while still providing reliable tool support when engaged.
3Strength
If a retractable lanyard is designed to work with heavy tools, then tool support is adequate, but the system becomes more complex
Solution Approach 1:
The simple segmentation of the lanyard into two portions (flexible and rigid) provides a straightforward solution that maintains tool support strength without adding complex mechanisms. The rigid portion's engagement with the socket is a simple mechanical interaction that does not require additional components.
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 easy access to tools without the need for a strong retraction mechanism, prevents tools from falling, and keeps them conveniently located, while allowing a lighter and simpler retraction mechanism design.
Implementation Method 1
the retraction mechanism includes a spring
Data Source
AI summary
A lanyard device suitable for connecting a tool to a user in use, including a housing at least part of which is adapted to be connected to clothing, belt and/or safety harness. The housing including at least one socket means formed thereon and/or therein, said device also including a flexible lanyard or tether means, at least one end of which is adapted to connect to a tool in use. At least part of the said lanyard means includes a portion to be received and/or engage with said socket means and said socket means shaped and/or orientated such that the flexible lanyard cannot pass freely through said socket means when the user lets go of the tool and/or lanyard.