Loop-String Pulley Attachment for Flexible Support Positioning
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Solution Overview
Problem
Existing pulley devices are cumbersome to fix to supports and lack flexibility in positioning, especially when no suitable fastening points are available, and they are not easily adaptable for arm stretching exercises.
Innovation Solution
A pulley device using a loop string with a loop fixing stopper and pulley housing that allows easy attachment to supports and adjustable positioning, incorporating a groove for rotating strings and handles for arm stretching exercises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal hook, ring, biner, or bracket is used to fix the pulley to the support, then the pulley can be securely attached, but the work of fixing the pulley becomes cumbersome and requires specific fastening points
Solution Approach 1:
The loop string is divided into a loop portion and two string extension portions, allowing the loop portion to be hung on the support while the extension portions connect to the pulley housing, simplifying the attachment process
Solution Approach 2:
The loop string is pre-formed with a loop portion that can be easily hung on the support before the pulley is attached, eliminating the need for on-site fastening operations
2Reliability
If a metal hook, ring, biner, or bracket is used to fix the pulley to the support, then the pulley can be securely attached, but it becomes difficult to use when no support capable of fastening is available
Solution Approach 1:
The loop string design allows the pulley to be attached to any support that can accommodate the loop portion, making the system universally applicable to various support structures without requiring specific fastening points
Solution Approach 2:
The loop string acts as an intermediary between the support and the pulley, enabling attachment to supports that would otherwise be incompatible with traditional hook or bracket systems
3Reliability
If a bolt fastening bracket is used to fix the pulley to the support, then the pulley can be securely attached, but the structure becomes complex and requires additional parts
Solution Approach 1:
The complex bracket structure with bolts and fastening mechanisms is removed entirely, replacing it with a simple loop string system that achieves the same attachment function with minimal components
Solution Approach 2:
Instead of using a rigid bracket to force the pulley onto the support, the flexible loop string allows the pulley to be easily positioned and attached by simply hanging the loop on the support
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
Facilitates easy connection and adjustable suspension of pulleys, enabling versatile use for lifting and arm stretching, with improved ease of use and adaptability.
Implementation Method 1
a pulley wheel and a pulley housing that rotatably supports the pulley wheel
Implementation Method 2
the loop portion interferes with the first and second string extension portions to firmly fix the loop string
Data Source
AI summary
A pulley device according to the present disclosure includes a loop string including a ring-shaped loop portion formed in an upper portion and first and second string extension portions extending downward, a loop fixing stopper through which the first and second string extension portions pass and to which a loop portion is connected to form a knot, and a pulley to which the first and second string extension portions are connected and which includes a pulley wheel.