Muscle Strength Training Device With Adjustable Electric Resistance

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Solution Overview

Problem

Existing muscle strength training devices require difficult and troublesome adjustments to variable resistance, often involving disassembly and reassembly, and pose risks such as injury from recoiling springs and elastic fatigue.

Innovation Solution

A muscle strength training device with an electric resistance unit that allows for adjustable resistance via a motor or electromagnetic brake, controlled by a mobile phone or control panel, enabling modes like constant, decreasing, and increasing resistance without disassembly, eliminating spring-related risks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If metal springs are used to provide variable resistance, then resistance can be adjusted by changing the number and/or elasticity coefficients of springs, but the adjustment process becomes very difficult and troublesome requiring disassembly and reassembly operation

Engineering Contradiction:

Improveresistance adjustment capabilityVSAvoidadjustment operation simplicity

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent replaces the mechanical spring-based resistance system with an electric resistance unit that uses electrical components (resistors, motor, or electromagnetic brake) to generate resistance. This substitution eliminates the need for mechanical disassembly and reassembly when adjusting resistance, as the electric system can be controlled through electrical switches or controls, thereby resolving the contradiction between adaptability and ease of operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If metal springs are used to provide resistance, then the device can achieve variable resistance, but the springs experience elastic fatigue after long-term use causing loss of resistance

Engineering Contradiction:

Improvevariable resistance capabilityVSAvoidresistance stability over time

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent replaces the mechanical spring system with an electric resistance unit that uses electrical components such as resistors, motors, or electromagnetic brakes. These electric components do not suffer from elastic fatigue like metal springs, thereby maintaining stable resistance characteristics over long-term use while still providing variable resistance capability through electrical control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Force

If metal springs are used to provide resistance, then the device can achieve the required resistance force, but the recoiling spring may hit and injure a user who inadvertently releases a pulling cord

Engineering Contradiction:

Improveresistance forceVSAvoiduser injury risk from recoiling spring

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical spring system with an electric resistance unit that generates resistance through electrical means (resistors, motor, or electromagnetic brake). This eliminates the recoiling mechanism inherent in springs, thereby removing the hazard of springback injury while maintaining the required resistance force for training.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Adaptability or versatility

If the number and/or elasticity coefficients of springs are changed to adjust resistance, then variable resistance can be achieved, but the adjustment process requires disassembly and reassembly operation

Engineering Contradiction:

Improveresistance variabilityVSAvoidadjustment mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical spring adjustment system with an electric resistance unit that provides resistance variability through electrical control mechanisms. This allows resistance adjustment without mechanical disassembly or reassembly, simplifying the device structure while maintaining adaptability for different resistance levels.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 provides easy and safe adjustment of resistance, avoiding spring-related injuries and fatigue, with simple operation and versatile resistance control.

Implementation Method 1

an electric resistance unit that generates resistance by way of an electrical source

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Data Source

PatentUS20250288845A1Muscle strength training device with electrically provided resistance

Publication Date: 2025.09.18 HSU CHIH YUNG

AI summary

A muscle strength training device with electrically provided resistance includes: a bed frame; a sliding board that can be slid on a bed plane of the bed frame along a longitudinal direction; two pulling cables for driving the sliding board to move in a first direction; and an electric resistance unit for generating resistance, wherein the resistance is transmitted to the sliding board to give the sliding board the potential to move in a second direction, which is the opposite direction of the first direction. The muscle strength training device allows the output mode of the resistance to be adjusted and changed with ease.