Adjustable Pulley Exercise System for Variable Resistance
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Solution Overview
Problem
Existing exercise systems with elastic resistance bands lack an efficient mechanism for adjusting resistance levels, limiting user flexibility in weight training exercises.
Innovation Solution
An exercise system with an adjustable mounting mechanism that allows for varying the distance between pulley systems, enabling users to adjust resistance levels by moving a second pulley system relative to a first pulley system, thereby altering the tension in an elastic cord.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distance between pulley systems is fixed, then the structure is simple, but the resistance level cannot be adjusted
Solution Approach 1:
The mounting mechanism transforms the fixed pulley system into a dynamic one where the second pulley system can be moved along the housing to different positions. This allows the resistance level to be adjusted by changing the distance between pulleys, directly applying the dynamics principle to resolve the contradiction between fixed structure and adjustable resistance.
Solution Approach 2:
The housing is divided into multiple positions where the second pulley system can be mounted, creating discrete adjustable segments. This segmentation allows for resistance level adjustment while maintaining a relatively simple structured housing with predefined mounting points.
2Force
If the elastic cord is stretched further, then the resistance increases exponentially, but the range of motion is reduced
Solution Approach 1:
The system allows users to change the parameter of cord stretch distance by adjusting the pulley positions. By moving the pulleys to different distances, users can select different resistance curves - smaller distances provide lower resistance with greater range of motion, while larger distances provide exponential resistance increase with reduced range of motion.
3Adaptability or versatility
If multiple resistance levels are provided, then user flexibility increases, but the device complexity increases
Solution Approach 1:
The mounting mechanism serves multiple functions: it provides resistance adjustment, maintains structural support, and allows position changes. This multi-functionality enables multiple resistance levels without proportionally increasing device complexity, as the same mechanism accomplishes several objectives simultaneously.
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
Provides multiple resistance settings, allowing users to customize exercises with an exponential increase in resistance as the elastic cord is stretched, enhancing the versatility and effectiveness of weight training.
Implementation Method 1
An elastic cord extends back and forth between the first and second pulley systems
Data Source
AI summary
An exercise system has an elongate rigid housing, and an elongate extension arm mounted via a pivot to a bottom end of the elongate rigid housing. A first pulley system is rotatably mounted to a fixed position of the elongate rigid housing. An adjustable mounting mechanism is mounted on the elongate rigid housing. A second pulley system is rotatably mounted on the adjustable mounting mechanism so that the second pulley system can be moved relative to the first pulley system, thereby adjusting the distance between the first pulley system and the second pulley system. An elastic cord extends back and forth between the first and second pulley systems, around the arm pulley of the elongate extension arm, and to a free end that may be used for performing exercises.