Magnetic Adaptor for Incremental Weight Plate Security
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Solution Overview
Problem
Existing magnetically coupled incremental weight plates are not compatible with non-magnetic dumbbell and barbell weight plates, which are common due to their durability and safety benefits, and often exhibit strong magnetic attraction that makes them difficult to remove, leading to safety and balance issues during exercises.
Innovation Solution
A magnetic adaptor system that includes a cylindrical bar with a hub and flange portion, where the flange has magnetically-responsive regions to secure incremental weight plates via magnetic force, allowing for easy attachment and detachment by rotating the incremental weight plate to change magnetic poles, enabling use with non-magnetic weight plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If magnetically coupled incremental weight plates are used, then easy attachment and detachment is achieved, but they are not compatible with non-magnetic weight plates
Solution Approach 1:
The patent introduces a magnetic adaptor as an intermediary component between the non-magnetic weight plate and the dumbbell bar. The adaptor contains magnetic material and is attached to the bar, while the incremental weight plate has a magnetic interface that couples with the adaptor. This mediator enables magnetic coupling functionality without requiring the weight plate itself to be magnetic, thus resolving the contradiction between ease of operation and adaptability.
2Reliability
If strong magnetic attraction is used to secure incremental weight plates, then safety is improved, but removal becomes difficult
Solution Approach 1:
The patent employs a dynamic magnetic coupling system where the magnetic attraction strength can be modulated. The magnetic adaptor and weight plate interface are designed to provide strong magnetic holding force during exercise to ensure safety, while allowing easy detachment when needed through deliberate user action such as pulling or rotating the weight plate. This dynamic approach resolves the contradiction between reliability and ease of operation.
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 secure and easy mounting and removal of incremental weight plates on non-magnetic dumbbells, ensuring safety and balance during exercises while accommodating the use of non-magnetic weight plates, addressing the compatibility and safety concerns of existing magnetically coupled systems.
Implementation Method 1
a flange portion of greater exterior dimension than the hub portion and having at least one generally magnetically-responsive region for securing an incremental weight via magnetic force
Data Source
AI summary
A dumbbell having weight plates onto which magnetically coupled incremental weight plates can be securely mounted comprises a bar, weights at the end regions of the bar, means for retaining the weight plates at the respective ends to define a handle region therebetween, and a sleeve of generally annular cross-section securely mounted about the bar at least one end region axially outward from the weight plate, said sleeve member having (a) a hub portion for accommodating the through-opening of a weight plate, and (b) a flange portion of greater exterior dimension than the hub portion and having at least one magnetically-responsive region for magnetically securing an incremental weight to the dumbbell when said incremental weight plate is mounted about said hub region. In accordance with the invention, an adaptor to convert conventional dumbbells to utilize magnetically-coupled incremental weight plates comprises elements (a) and (b) above.