Stretching Device With Loop Receptacles For Adjustable Tension
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Solution Overview
Problem
Existing stretching devices with connecting ropes require constant tension to maintain distance adjustment, leading to strain on arm muscles and are prone to unwinding, making them inconvenient for use.
Innovation Solution
A stretching device with a connecting belt featuring loop-shaped receptacles allows adjustable positioning of rod-shaped foot and handle parts, which can be securely attached to prevent rotation and maintain tension, enabling easy adjustment and use without constant strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a connecting rope is used to join the foot section and handle section, then the device can be adjusted for distance, but constant tension must be maintained to prevent unwinding, resulting in strain on arm muscles
Solution Approach 1:
The connecting element is segmented into multiple discrete loop-shaped receptacles spaced at different positions along the connecting strap. This allows the handle section to be inserted into different loops to achieve various distance adjustments without requiring continuous tension maintenance, as each loop provides a discrete, stable attachment point.
Solution Approach 2:
The loop-shaped receptacles serve as intermediary elements between the connecting strap and the handle section. These receptacles provide fixed attachment points that mediate the connection, allowing distance adjustment while eliminating the need for constant tension to prevent unwinding, as the loops structurally prevent detachment when properly engaged.
2Adaptability or versatility
If a connecting rope is used for distance adjustment, then flexibility is provided, but the connecting rope can easily unwind itself when released, requiring readjustment
Solution Approach 1:
The continuous connecting rope is segmented into discrete loop-shaped receptacles at specific positions. This segmentation ensures that when the handle section is inserted into a loop, it is securely held at that specific position without the ability to unwind or slip, providing reliable position stability while still allowing adjustment to different loops.
Solution Approach 2:
Instead of using a continuous rope that requires tension to maintain position, the invention inverts the approach by using fixed loop-shaped receptacles that structurally define the positions. The handle section is inserted into these pre-formed loops, reversing the mechanism from active tension-maintenance to passive structural retention, ensuring the selected distance is maintained even when tension is reduced.
3Ease of operation
If the handle section can rotate relative to the connecting strap during winding, then adjustment is possible, but the handle section may rotate unintentionally, compromising secure attachment
Solution Approach 1:
The handle section has a localized firm connection to the connecting strap at a specific point (such as a screw connection), while other portions remain free for insertion and rotation during adjustment. This local firm connection prevents unintended rotation and ensures secure attachment during use, while still allowing controlled rotation when needed for winding adjustments.
Data Source
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AI summary
The invention relates to a stretching device for stretching exercises comprising a foot section (1), a handle section (2), and a flexible, non-elastic connecting element (3) for connecting the foot section (1) to the handle section (2). To achieve improved adjustability, the connecting element is designed as a connecting strap (3) with several adjacent loop-shaped receptacles (4) for inserting the foot section (1) and/or the handle section (2).