Threaded Counterweight Dumbbell Assembly for Easy Weight Changes
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Solution Overview
Problem
The replacement operation of dumbbells is complex, involving multiple steps that can lead to assembly difficulties and potential user injury.
Innovation Solution
A dumbbell design featuring screw holes and connection portions that allow for easy attachment and detachment of counterweights, ensuring a firm connection and simple, flexible assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional dumbbell replacement operation is used, then counterweights can be replaced, but the assembly steps are complex and may easily cause difficulties in assembly or lead to injury to the user
Solution Approach 1:
The dumbbell is divided into modular components: a grip rod, multiple interchangeable counterweights, and protective elements. Each counterweight can be independently attached or detached from the grip rod, allowing users to easily reconfigure weight combinations without complex assembly procedures. The segmentation enables simple pick-up-and-attach operation where users only need to attach the desired counterweight to the grip rod.
Solution Approach 2:
A protective element acts as an intermediary component between the counterweight and the grip rod. This protective element features a receiving cavity that accommodates the counterweight and a fastening structure that secures it to the grip rod. The intermediary protective element simplifies the connection process by providing a built-in attachment mechanism, eliminating the need for users to directly manipulate complex fastening systems.
2Adaptability or versatility
If traditional dumbbell replacement operation is used, then counterweights can be replaced, but the operation may easily cause difficulties in assembly or lead to injury to the user
Solution Approach 1:
The protective element is designed with a receiving cavity and fastening structure that securely holds the counterweight before use. This pre-secured configuration prevents the counterweight from detaching unexpectedly during exercise, eliminating the risk of injury from falling weights. The protective element acts as a safety buffer that ensures stable connection throughout the exercise process.
3Ease of operation
If simple attachment method is used, then assembly is easy, but the connection may not be firm enough
Solution Approach 1:
The protective element is pre-configured with a receiving cavity and fastening structure during manufacturing. When assembling, users simply place the counterweight into the pre-formed receiving cavity and engage the fastening mechanism, which is already positioned to provide secure attachment. This preliminary preparation of the protective element ensures both ease of assembly and firm connection without requiring users to perform complex alignment or fastening operations.
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 design provides a safe, simple, and flexible way to adjust the weight of dumbbells, reducing the risk of injury and simplifying the assembly process.
Implementation Method 1
the first connection portion is threadedly received in the first screw hole to connect the first grip rod with the first counterweight
Implementation Method 2
the second connection portion is threadedly received in the second screw hole
Data Source
AI summary
The present disclosure relates to a dumbbell, which includes a first grip rod and two counterweight assemblies, each of both ends of the first grip rod defines a first screw hole, each of the two counterweight assemblies comprises at least one first counterweight, the first counterweight comprises a first connection portion, the first connection portion is threadedly received in the first screw hole to connect the first grip rod with the first counterweight. The present disclosure further provides a fitness equipment applying the dumbbell.