Retractable Cable Resistance Unit With Adjustable Ski-Poling Tension
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Solution Overview
Problem
Existing exercise devices lack portable and adjustable means to provide upper-body resistance, especially for stationary users without underlying machines, and existing portable options are not adjustable.
Innovation Solution
A retractable, handheld cable apparatus with a spooled cable and retractor spring system that can be attached to a fixed object, allowing adjustable resistance through a push-to-turn knob, simulating cross-country ski poling motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If expensive, bulky add-ons are used to provide adjustable upper body resistance to exercise devices, then adjustable resistance is achieved, but portability and device complexity increase
Solution Approach 1:
The exercise device is divided into separate components: a portable resistance unit with spooled cable and handle that can be independently attached to various exercise machines. This segmentation allows the resistance mechanism to be used across multiple devices without increasing the complexity of each individual machine.
Solution Approach 2:
The resistance mechanism is extracted from the main exercise device and placed in a separate, portable unit. The spooled cable system with retractor spring is housed in a compact container that can be easily attached and removed, eliminating the need for bulky integrated add-ons.
2Device complexity
If portable exercise equipment is used, then portability is improved, but adjustability of resistance is lost
Solution Approach 1:
The resistance unit incorporates a dynamic adjustment mechanism where the spring tension can be modified by the user during exercise. The cable spool system allows variable resistance as the handle moves through different positions, providing adaptability while maintaining portability.
Solution Approach 2:
The resistance characteristics are changed by adjusting spring pre-tension and cable routing. Users can modify the resistance parameters by repositioning the spring anchor point or changing cable tension, enabling adjustable resistance in a compact, portable device.
3Adaptability or versatility
If a retractable cable spool system is used, then portability and adjustability are achieved, but manufacturing precision requirements increase
Solution Approach 1:
The cable routing system is divided into discrete tracking points within the handle and container. By defining specific guide points and pulley locations, the system achieves reliable cable tracking without requiring high-precision manufacturing throughout the entire assembly.
Solution Approach 2:
Pulleys and guide elements act as intermediaries between the cable and the spool mechanism. These components facilitate smooth cable routing and reduce the precision requirements for the spool mounting and cable attachment points.
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 adjustable and portable upper-body resistance for stationary exercises, enhancing workout intensity and versatility.
Implementation Method 1
The handheld, spooled end of the cable is tracked through the handle itself through built-in pulleys into a retractor spring-based cable spool
Data Source
AI summary
Methods and systems for a retractable handheld exercise apparatus. The methods and systems generate a movement similar to upper body ski poling whereby a pair of handheld units [A] are connected to a fixed object by an attachment means [B] and are moved in an upper body walking motion to and from the fixed attachment point along a cable [C]. The apparatus includes functionality to increase or decrease tension which changes the amount of force required to pull the unit away from the fixed point.