Lanyard Double Fastener Prevents Unintentional Release
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Solution Overview
Problem
Existing lanyards with single hook-and-loop fasteners are prone to unintentional release and security issues due to elongation or breakage of loops over time, leading to inadequate securement of accessories.
Innovation Solution
A double fastener system with a 'T' shape design, incorporating a latch and lock mechanism that uses multi-layer hook-and-loop fasteners to securely attach an accessory to a lanyard, providing additional security by overlapping connections to prevent unintentional unfastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single hook-and-loop fastener is used to attach an accessory to a lanyard, then the fastening mechanism is simple and easy to operate, but the security and reliability are insufficient due to potential unintentional release and loop elongation over time
Solution Approach 1:
The fastening mechanism is divided into two separate latch components: a first latch that attaches to the lanyard and a second latch that attaches to the accessory. This segmentation allows each latch to independently contribute to the overall security, preventing unintentional release while maintaining manageable complexity through modular design
Solution Approach 2:
The second latch is positioned to overlap and cover the first latch, creating a nested configuration where the second latch protects and secures the first latch connection. This nesting arrangement enhances reliability by providing a redundant securing mechanism without significantly increasing operational complexity
2Duration of action of stationary object
If a single hook-and-loop fastener is used, then the device structure is simple, but the fastener becomes less secure after extended use due to loop elongation or breakage
Solution Approach 1:
By dividing the fastening function into two separate latches, the system distributes mechanical stress and wear across multiple connection points. This reduces the cumulative damage any single loop structure experiences over time, extending the overall lifespan of the fastening mechanism
Solution Approach 2:
The overlapping configuration of the two latches provides a cushioning effect where the second latch compensates for potential weakening or elongation of the first latch loops over time, maintaining secure attachment even after extended use
3Strength
If a single hook-and-loop fastener is used, then the lanyard design is simple, but the accessory may unintentionally separate when pulled with force
Solution Approach 1:
The attachment system is segmented into two independent latch-fastener pairs working in parallel. When force is applied to the accessory, both latches simultaneously resist the pulling force, distributing the mechanical load and preventing unintentional separation that would occur with a single fastener
Solution Approach 2:
The second latch is nested over the first latch, creating a layered securing arrangement where both latches must be simultaneously overcome to release the accessory. This nested configuration multiplies the holding strength while maintaining a relatively compact and simple overall design
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
The double fastener system significantly enhances the security and durability of attaching accessories to lanyards, preventing unintentional release and extending the lifespan of the fastening mechanism by distributing the force across multiple hook-and-loop connections.
Implementation Method 1
The latch includes a distal end that loops back over itself and is secured to a front face of the base portion by a hook-and-loop fastener
Implementation Method 2
The distal ends are secured to one another by a hook-and-loop connection
Data Source
AI summary
The lanyard described herein includes a double fastener for securely supporting an accessory, such as a watch face, phone or other item on a lanyard. The lanyard is preferably made from a traditional length of material that is intended to be worn around the neck of a wearer to provide access to an item held on an end of the lanyard near the chest of the wearer. The double fastener includes a latch strip connected to a base portion of the lanyard at one end with the other end looped back over and connected to the base portion by a hook-and-loop connection. The latch is subsequently secured by a locking mechanism which overlaps the latch and locks it in the fastened orientation. Accordingly, the double fastener not only supports the accessory with a latch but also ensures the latch does not inadvertently come undone by way of the lock.