Gravity-Operated Shifting Mechanism for Exercise Apparatus
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Solution Overview
Problem
Existing weight lifting machines require manual or electrical adjustments, which can disrupt workouts and are costly to maintain, lacking the ability to adjust resistance seamlessly during exercises without external assistance or power.
Innovation Solution
A self-contained, gravity-powered weight lifting device that allows users to manually adjust resistance by moving a resistance weight along a lever arm, enabling instant changes in effort without stopping the workout or using electrical components, compatible with existing machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual or electrical adjustments are used to change resistance, then the user can adjust weight, but the workout is disrupted or electrical components are required
Solution Approach 1:
The resistance weight is made dynamically movable along the lever arm through a trip mechanism that releases during exercise movement. The weight can shift positions automatically during the workout without requiring the user to stop or manually adjust, making the resistance adjustment dynamic rather than static.
Solution Approach 2:
The system uses the user's own exercise movement to trigger the trip mechanism, which automatically releases the resistance weight to a new position. The workout itself powers the adjustment mechanism, eliminating the need for external assistance or electrical components while maintaining workout continuity.
2Extent of automation
If electrical components are used to adjust resistance, then automated adjustment is achieved, but maintenance costs increase and electrical power is required
Solution Approach 1:
The patent replaces electrical motors and sensors with a purely mechanical trip mechanism that uses the natural dynamics of the exercise movement. The release mechanism is triggered by the lever arm's motion itself, eliminating expensive electrical components while achieving automated resistance adjustment through mechanical means.
Solution Approach 2:
The mechanical trip mechanism is self-actuating, using the exercise movement to trigger the resistance weight release. No external power source or complex control systems are needed—the system uses its own operational dynamics to automate the adjustment process, reducing maintenance requirements.
3Measurement precision
If the user stops the workout to adjust weight, then precise resistance control is achieved, but workout time is lost
Solution Approach 1:
The resistance adjustment occurs continuously during the workout without interruption. The trip mechanism is triggered by the natural rhythm of the exercise movement, allowing the resistance weight to shift positions seamlessly while the user maintains their workout flow, eliminating dead time between sets or adjustments.
Solution Approach 2:
The system dynamically adjusts resistance in real-time during the exercise motion. The trip mechanism responds to the lever arm's position and velocity, automatically releasing the resistance weight at appropriate moments without requiring the user to pause or consciously intervene, maintaining both precision and continuity.
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 uninterrupted, precise control of resistance during workouts, reducing maintenance costs and allowing for various training regimens without electrical dependencies, suitable for individual and commercial use.
Implementation Method 1
a resistance weight movable between a first position and a second position along the lever arm
Data Source
AI summary
An exercise apparatus is provided where a user selectively changes the amount of effort required to operate the machine on demand without interrupting the workout. A manual shifting process allows the user to selectively change the amount of resistance with the gravity included positioning of a resistance weight on a lever arm.