Lock-Disc Dumbbell Assembly for Fast, Secure Plate Changes
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Solution Overview
Problem
Traditional assembled dumbbells require cumbersome and potentially hazardous processes for adjusting weight, with dumbbell plates needing removal and replacement, and there is a risk of injury or damage due to misoperation.
Innovation Solution
A dumbbell assembly design featuring a dumbbell rod with rotating handle and lock discs that interlock with dumbbell plates, allowing for secure attachment and detachment through U-shaped insertion ports and clamping portions, along with a tray-based locking mechanism to stabilize the handle and prevent unintentional rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fixing members are removed to replace dumbbell plates, then plate replacement is possible, but the replacement process becomes troublesome and time-consuming
Solution Approach 1:
The patent extracts the fixing member from the replacement process by designing a through-hole in the dumbbell plate that allows the rod end to pass through directly. This eliminates the need to remove fixing members for plate replacement, enabling users to simply slide plates onto the rod through the holes, thereby simplifying the replacement process and reducing time consumption.
Solution Approach 2:
The dumbbell plate is segmented into multiple functional regions: weight-bearing surfaces, through-holes for rod passage, and peripheral surfaces for hand gripping. This segmentation allows the plate to be easily mounted or removed by simply passing the rod through the holes without interfering components, making the replacement process quick and straightforward.
2Reliability
If traditional fixing members are used to secure dumbbell plates, then plates are secured, but misoperation can cause plates to hurt feet or damage the ground
Solution Approach 1:
The dumbbell plate's own structure provides the securing function through its through-holes that fit over the rod ends. The plate secures itself to the rod by gravity and friction without requiring additional fixing members that could fail or be misoperated, eliminating the source of potential injury while maintaining reliability.
Solution Approach 2:
The patent removes traditional fixing members (such as collars or locking mechanisms) that could fail or be misused. By using only the through-hole geometry and rod-end fit, the design eliminates components that could cause injury through misoperation, while still providing secure plate attachment through simple gravitational and frictional forces.
3Ease of operation
If dumbbell plates are freely movable on the rod, then plates can be adjusted, but accidental movement or falling can occur
Solution Approach 1:
The rod ends are designed to extend beyond the plate edges, creating a mechanical stop that prevents the plate from sliding off. This geometric constraint provides inherent stability without interfering with the ability to adjust plates along the rod, as users can freely position plates within the stable range defined by the rod-end limits.
Data Source
AI summary
Provided herein is a dumbbell, including a dumbbell rod assembly and dumbbell plates, where the dumbbell rod assembly includes a dumbbell rod, each of the dumbbell plates is provided with a second clamping portion, the middle of the dumbbell rod is sleeved with a handle, two sides of the dumbbell rod are provided with hanging assemblies respectively, each of the hanging assemblies includes a plurality of lock discs, each of the lock discs is provided with a first clamping portion and a stand column, and the second clamping portion of the dumbbell plate moves relatively between the stand column and the first clamping portion of the lock disc and is clamped with the first clamping portion.