Portable Cable Training Assembly With Screw-Driven Variable Resistance
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Solution Overview
Problem
Conventional resistance-based workout devices are large, heavy, difficult to transport, require substantial space, and often necessitate prior knowledge for use, with mechanical designs needing battery charging and electronic designs posing tripping hazards.
Innovation Solution
A cable training assembly with a screw mechanism deflecting springs to exert retraction force on a cable, housed in a portable device, featuring a selector assembly with a knob for adjustable resistance via an intermittent gear system, allowing smooth motion and high load support without binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional physically weighted workout devices are used, then resistance training function is provided, but the device becomes large and heavy requiring substantial storage space
Solution Approach 1:
The weight stack is divided into multiple individual weight plates that can be independently selected and stacked. Users can configure the resistance by stacking only the needed weight plates rather than having a fixed large weight stack, reducing the required storage space while maintaining full resistance training functionality.
Solution Approach 2:
The device transitions from a fixed, static weight configuration to a dynamic, adjustable weight configuration. The selective stacking mechanism allows users to dynamically adjust the weight stack size and resistance levels based on specific exercise needs, optimizing both space utilization and training effectiveness.
2Reliability
If conventional physically weighted workout devices are used, then resistance training function is provided, but the device becomes heavy and difficult to transport
Solution Approach 1:
The weight system is segmented into separate, removable weight plates that can be selectively stacked. This allows users to transport only the weight plates needed for specific exercises rather than moving the entire fixed weight stack, significantly reducing transport weight while maintaining resistance training capability.
Solution Approach 2:
The weight plates are extracted as separate, independently transportable components from the main device structure. Users can remove and transport only the necessary weight plates in a convenient manner, separating the transport burden from the full device weight.
3Reliability
If mechanical resistance devices are used, then resistance training function is provided, but prior knowledge of device operation is required
Solution Approach 1:
The device incorporates self-explanatory visual indicators and intuitive weight plate design that allow users to understand and operate the equipment without prior knowledge. The weight plates and stacking mechanism are designed to be self-evident, with clear markings and obvious operational procedures that users can grasp through direct interaction.
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
The device is compact, lightweight, easy to move, and adaptable to various spaces, providing variable resistance without prior knowledge and minimizing maintenance, with a high load-to-size ratio and smooth operation.
Implementation Method 1
a screw mechanism configured to deflect at least one spring. The deflection of the spring exerts a retraction force on the cable
Implementation Method 2
The screw mechanism is configured to deflect at least one spring. The deflection of the spring exerts a retraction force on the cable
Implementation Method 3
the screw mechanism is a ball screw assembly having a threaded ball screw at least partially extending through an internally threaded ball nut
Data Source
AI summary
A cable training assembly disposable within a portable housing includes a cable configured for pulling by a user and a screw mechanism configured to deflect at least one spring. The deflection of the spring exerts a retraction force on the cable in opposition to a force exerted on the cable by the user. A selector assembly includes a knob that is rotatable by the user to select or deselect a spring acting on the cable.