Rotary Dumbbell Plate Locking Structure for Fast Weight Adjustment
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Solution Overview
Problem
Existing dumbbell designs face issues with inefficient weight adjustment operations and potential safety hazards due to loose dumbbell plates, especially when using threaded or inserting mechanisms, which are cumbersome and prone to shaking.
Innovation Solution
A rotary positioning dumbbell combination structure featuring radial protrusions and grooves with elastic sheets and positioning gaps, allowing for secure locking and positioning without external locking mechanisms, facilitated by radial elastic sheets and positioning grooves that deform and engage to stabilize the dumbbell plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If threaded or inserting mechanisms are used to add or subtract dumbbell plates, then weight adjustment is achieved, but operation efficiency is low and the plates are easy to loosen
Solution Approach 1:
The patent employs a dynamic locking mechanism where the elastic component automatically engages and disengages based on rotational movement. The elastic component deforms during rotation and locks into position, providing both ease of operation through simple rotational motion and reliability through automatic locking engagement.
Solution Approach 2:
The elastic component performs the locking function automatically without requiring additional locking operations. The system self-locks through the elastic deformation and engagement geometry, eliminating the need for separate locking actions and improving both operation efficiency and locking reliability.
2Reliability
If external locking mechanisms are added to prevent plate loosening, then plate stability is improved, but device complexity increases
Solution Approach 1:
The patent merges the locking function with the existing rotational connection structure. The elastic component is integrated into the connection between the dumbbell plate and the handle, combining the rotational movement and locking functions into a single unified mechanism, thereby improving reliability without adding external locking components.
Solution Approach 2:
The elastic component provides self-locking functionality through its inherent elastic properties and geometric engagement. The system locks automatically through the elastic deformation during rotation, eliminating the need for separate locking mechanisms and reducing structural complexity while maintaining high reliability.
3Reliability
If horizontal switching action is combined with twisting action for adding or subtracting plates, then locking is achieved, but operation becomes cumbersome
Solution Approach 1:
The patent uses dynamic elastic deformation to achieve locking through a single rotational motion. The elastic component deforms during the rotational insertion/removal process and automatically locks or unlocks, eliminating the need for combined horizontal switching and twisting actions, thereby simplifying operation while maintaining reliability.
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 structure provides enhanced operational convenience and safety by ensuring dumbbell plates remain locked during use, eliminating the need for external locking and reducing the risk of shaking, thus improving the user experience.
Implementation Method 1
at least one radial elastic sheet is provided on the at least one radial protrusion; at least one positioning groove is provided on the at least one radial elastic sheet at a position facing the at least one positioning protrusion
Data Source
AI summary
The present disclosure relates to a rotary positioning dumbbell combination structure and a dumbbell adopting the combination structure, and the rotary positioning dumbbell combination structure comprises at least one dumbbell plate body, and at least one of at least one radial protrusion or at least one radial groove is arranged on left and right sides of the at least one dumbbell plate body; at least one radial groove and at least one radial protrusion are matched; the at least one positioning protrusion is provided in the at least one radial groove; at least one radial elastic sheet is provided on the at least one radial protrusion; and the at least one positioning groove is provided on the at least one radial elastic sheet at a position facing the at least one positioning protrusion.