Foot Holder Strap Adjustment Mechanism
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Solution Overview
Problem
Existing foot ascenders face issues with strap interference with the trigger and lack of fine adjustment, leading to inadequate retention and positioning, especially with different shoe types.
Innovation Solution
A compact attachment device with a tightening element that blocks and adjusts the second strap at the loop slot, preventing interference with the trigger and allowing for precise length adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the second strap is allowed to adjust freely in the loop, then the length adjustment flexibility is improved, but the strap retention and positioning precision deteriorate
Solution Approach 1:
The patent introduces a tightening element with a blocking part that can be positioned in advance at specific locations along the second strap. This blocking part can engage with the loop at predetermined positions, allowing the strap to be adjusted to specific lengths while maintaining secure retention. The blocking part acts as a pre-positioned mechanism that guides the strap to exact locations, solving both the need for adjustment flexibility and positioning precision.
2Reliability
If the second strap is retained tightly in the loop, then the strap retention is improved, but the ability to adjust the strap length deteriorates
Solution Approach 1:
The patent employs a dynamic tightening element that can transition between different states. The blocking part can be moved along the second strap to different positions, and when positioned, it engages with the loop to provide secure retention. The element allows the user to easily move the blocking part to adjust the strap length, then locks into place to provide reliable retention. This dynamic mechanism resolves the contradiction between easy adjustment and secure retention.
3Device complexity
If the attachment device is made compact, then the device complexity is reduced, but the fine adjustment capability deteriorates
Solution Approach 1:
The patent integrates the tightening element with the loop structure in a nested configuration. The blocking part of the tightening element is positioned within or adjacent to the loop, allowing it to engage with the second strap at the exact location where the strap passes through the loop. This nested arrangement maintains a compact overall device structure while providing precise adjustment capability through the blocking part's engagement point.
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 solution enhances strap retention and positioning, ensuring secure attachment and easy adjustment, improving user safety and comfort during rope ascents.
Implementation Method 1
A return spring 17 is mounted on shaft 9 to urge trigger 6 towards the closed position
Implementation Method 2
a mobile trigger pivotally mounted on the body between a closed position and an open position
Implementation Method 3
The trigger 6 comprises a wedging surface 7 with pins, intended to press the rope against a chute 8 when the body 5 of the blocking element 2 is biased downwards by the weight of the user
Implementation Method 4
when the body 5 of the blocking element 2 is biased downwards by the weight of the user
Data Source
AI summary
The lock (1) has a trigger (6) that is pivotally attached to a fastener device (10) of a strap that is intended to surround the ankle of a user. Another fastener device (11) comprising a loop (15) having a slot (19) for passage of another strap (4) under the sole of a shoe of the user. A clamping element (20) is arranged in the loop, where the clamping element is crossed by the latter strap. The clamping element has a blocking part (21) facing the slot through the loop for locking of the latter strap in the loop.