Weight-Adjustable Dumbbell Telescopic Rod Mechanism
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Solution Overview
Problem
Current weight-adjustable dumbbells have complex and time-consuming installation processes when changing weights, as users need to detach and reattach locking nuts to adjust dumbbell plates.
Innovation Solution
A weight-adjustable dumbbell design featuring a grip rod assembly with a telescopic rod and limit structure, allowing weight adjustment by rotating the outer rotary rod to lengthen or shorten the telescopic rod, and a locking assembly for secure weight selection, reducing the need for frequent plate changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional locking nuts and dumbbell plates are used for weight adjustment, then the dumbbell can be adjusted to different weights, but the installation process becomes complicated and time-consuming
Solution Approach 1:
The dumbbell is divided into a plate body and multiple detachable weight blocks, each with specific weights. This segmentation allows users to adjust weight by simply attaching or detaching pre-configured weight blocks rather than manually assembling individual plates and adjusting locking nuts, significantly simplifying the operation while maintaining weight adaptability
Solution Approach 2:
The weight blocks are pre-configured with fixed weights and connection structures during manufacturing. Users only need to attach or detach these pre-prepared weight blocks to the plate body, eliminating the need for on-site calculation, measurement, and manual assembly of individual plates, thus reducing installation time and complexity
2Adaptability or versatility
If multiple dumbbell plates are manually assembled and disassembled, then weight can be changed, but the process becomes time-consuming
Solution Approach 1:
The weight adjustment function is segmented into discrete, pre-fabricated weight blocks that can be independently attached or detached. Each weight block is a complete unit with integrated connection features, allowing users to quickly switch between weight configurations without manually handling multiple individual plates, thereby reducing adjustment time while maintaining flexible weight selection
Solution Approach 2:
The weight parameter is changed by simply exchanging entire weight blocks rather than adjusting individual plate configurations. This parameter change approach allows for rapid weight selection by attaching or detaching pre-configured blocks, significantly reducing the time required for weight adjustment compared to manual plate assembly and disassembly
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 quick and easy weight adjustment by rotating the outer rotary rod, enhancing user convenience and safety by stabilizing the dumbbell plates during exercise.
Implementation Method 1
the telescopic rod is telescopically connected to the outer rotary rod
Implementation Method 2
a limit structure is provided between adjacent dumbbell plates for restricting an axial movement between the adjacent dumbbell plates
Implementation Method 3
the first guiding inclined surface and the second guiding inclined surface are buckled with each other, so that the inserting block and the inserting slot cannot be detached in the axial direction of the dumbbell plate
Data Source
AI summary
Disclosed are a weight-adjustable dumbbell and a dumbbell assembly. The dumbbell assembly includes a grip rod assembly and a dumbbell plate, wherein the grip rod assembly includes an outer rotary rod and a telescopic rod, the telescopic rod is telescopically connected to the outer rotary rod, the telescopic rod movably penetrates through the dumbbell plate, and a limit structure is provided between adjacent dumbbell plates for restricting an axial movement between the adjacent dumbbell plates. A dumbbell assembly includes one or more weight-adjustable dumbbells as mentioned above and a dumbbell base.