Elastic Resistance Exercise Device With Variable Overlap
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Solution Overview
Problem
Existing elastic resistance devices face limitations in adjusting resistance strength in fine increments without requiring new purchases, and they often apply uneven resistance throughout the range of motion.
Innovation Solution
The device employs multiple elastic body parts overlapping at fixed intervals, adjusted by length adjusting devices, allowing for precise control of resistance strength without changing the total length of the elastic bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resistance strength is adjusted by changing the length of the elastic body, then resistance strength can be modified, but adjustment is limited only within the range suitable for exercise movement and cannot be shorter or longer than suitable for exercise movement
Solution Approach 1:
The elastic body is divided into multiple segments (first elastic body part and second elastic body part) that can overlap to different extents. The overlapping portion can be adjusted independently from the total length, allowing resistance strength to be modified while maintaining the total length within the suitable exercise range.
Solution Approach 2:
The device introduces a dynamic adjustment mechanism that allows the overlapping length between elastic body parts to be changed during use. This enables continuous adjustment of resistance strength without changing the total length, providing both wide adjustment range and operational flexibility.
2Adaptability or versatility
If strength is adjusted according to the number of windings around the body, then resistance strength can be modified, but the difference between one winding and two windings is too significant making it difficult to easily adjust strength in fine steps
Solution Approach 1:
The overlapping length between elastic body parts can be continuously adjusted, providing fine-grained control over resistance strength. This dynamic adjustment mechanism allows for incremental changes in strength rather than discrete steps, enabling precise adjustment in fine increments.
Solution Approach 2:
The device changes the overlapping length parameter to adjust resistance strength. By varying this parameter continuously, the system achieves fine adjustment precision, allowing users to select exact resistance levels needed for progressive overload training.
3Adaptability or versatility
If strength is adjusted according to the material's elastic modulus, then resistance strength can be modified, but several purchases are required to obtain different elastic moduli
Solution Approach 1:
Instead of requiring multiple products with different elastic moduli, the invention segments a single elastic body into multiple parts that can overlap. This allows resistance strength to be varied by changing the overlapping configuration rather than changing the material property, eliminating the need for multiple purchases.
Solution Approach 2:
A single elastic body product serves multiple resistance strength levels through its adjustable overlapping mechanism. This multi-functional design replaces the need for multiple specialized products, reducing device complexity and eliminating repeated purchases.
4Ease of manufacture
If the elastic body is used to provide resistance, then cost reduction and easy transport are achieved, but the elastic body deforms when it exceeds a specific stress limit
Solution Approach 1:
The elastic body is divided into multiple parts that share the applied load through their overlapping configuration. This segmentation distributes stress more evenly, allowing the system to handle higher forces without any single part exceeding its stress limit and deforming.
Solution Approach 2:
Multiple elastic body parts are combined in an overlapping configuration where they work together to provide resistance. This merging of multiple load-bearing elements increases the overall stress capacity while maintaining the cost-effective and portable benefits of elastic bodies.
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
Enables fine-tuned resistance adjustments and uniform resistance application across the entire range of motion, enhancing exercise effectiveness and flexibility in adapting to varying user abilities.
Implementation Method 1
an elastic body provided as a body winded in spiraling turns... when a user pulls the elastic body in the direction of the arrow, the strength required to move to point b′ is much greater than the strength needed to move to point a′
Data Source
AI summary
A physical exercise elastic device, where two elastic bodies overlap and adjust the stretching section to regulate tension during exercise, comprising: a first and a second elastic body part arranged apart from each other; a fixing part that connects a portion of the second elastic body part to a portion of the first elastic body part; multiple connecting members positioned at intervals along the longitudinal direction of the first elastic body part and the second elastic body part; a fastening member that connects one of the connecting members from the first elastic body part and one of the connecting members from the second elastic body part.