Loop String Stopper Structure for Adjustable Handle Height
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Solution Overview
Problem
Existing loop string fixing devices for pull-up handles do not allow for adjustable height settings, requiring users to replace the loop string based on their height, and the process of attaching and detaching the handle is inconvenient due to the need to untie and re-tie the knot.
Innovation Solution
A loop string fixing device featuring a stopper with laterally spaced through hole rows on a front plate, allowing the loop string to be adjusted in length by changing the position of the stopper along the loop string, thereby enabling secure fixation to a support body like a straight bar or ring without the need for frequent string replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the loop string is fixed using a traditional knot method, then the handle can be securely attached to the support body, but the height cannot be adjusted and the string cannot be easily replaced
Solution Approach 1:
The front plate is segmented with multiple through holes arranged in rows at different heights. The string passes through specific through holes to create fixed segments at different height levels, enabling height adjustment without retying the entire knot.
Solution Approach 2:
The fixing system transitions from a static fixed-height knot to a dynamic adjustable-height system. The string can be moved between different through holes to change the height of the handle relative to the support body, providing adaptability while maintaining secure fixation.
2Adaptability or versatility
If the loop string length is fixed, then the structure is simple, but users must replace the entire string when height adjustment is needed
Solution Approach 1:
The front plate is divided into multiple through holes arranged in rows. Each row provides discrete height positions, segmenting the continuous height adjustment into manageable discrete steps that maintain structural simplicity while enabling adjustability.
Solution Approach 2:
The through holes act as intermediary elements between the string and the front plate. These holes provide predetermined positions that mediate the adjustment process, allowing height change without complex mechanisms or string replacement.
3Reliability
If the handle is securely knotted to the support body, then the fixation is reliable, but the process of attaching and detaching requires untying and re-tying knots which is inconvenient
Solution Approach 1:
The knot-tying operation is extracted and replaced with a simpler through-hole insertion operation. The string ends are pulled through the through holes to create secure fixation without requiring complex knotting, making attachment and detachment more convenient.
Solution Approach 2:
The through holes themselves provide the fixation function without requiring external knotting actions. The structure of the front plate with its through holes performs the securing function automatically when the string is inserted, eliminating the need for manual knot-tying and untying operations.
Data Source
AI summary
According to the present disclosure, a loop string fixing device includes a stopper used for fixing a loop string, the loop string being a string curved at a middle portion to form a loop part and including first and second string extensions extending from the loop part and first and second string end portions at ends of the first and second string extensions, the stopper including a front plate that is formed with first and second through hole rows laterally spaced apart from each other and extending in a height direction, and each of the first and second through hole rows including upper through holes and lower through holes located below the upper through holes.