Modular Dumbbell Coupler for Adjustable Weight Configuration
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Solution Overview
Problem
Existing modular weight devices for dumbbells lack the ability to easily adjust the overall mass, requiring multiple individual dumbbells for different exercises and not allowing for seamless weight modification.
Innovation Solution
A modular weight system comprising vertically stackable weights with centrally displaced openings and a coupler that securely engages selected weights to a handle, allowing for adjustable weight configurations by stacking and disengaging weights, enabling users to select the desired weight for exercises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple individual dumbbells are used for different exercises, then the ability to perform various exercises with different weights is improved, but the device complexity and space requirement increase
Solution Approach 1:
The dumbbell weight system is divided into separate modular weight elements that can be independently attached or detached from the handle. Each weight element can be selectively combined to create different total weights, allowing one handle to replace multiple complete dumbbells of different weights.
Solution Approach 2:
A single handle is designed to be compatible with multiple weight elements of different masses, making the handle universal for various exercise requirements. This multi-functional design allows the same handle to be used across different weight configurations, eliminating the need for multiple specialized dumbbells.
2Ease of operation
If traditional fixed-weight dumbbells are used, then the structural simplicity is maintained, but the ease of operation for adjusting weight is worsened
Solution Approach 1:
The weight system transitions from a static fixed-weight design to a dynamic adjustable configuration. The coupling mechanism allows weights to be easily attached and detached during use, enabling real-time adjustment of weight without requiring tool removal or complex disassembly procedures.
Solution Approach 2:
A coupling mechanism serves as an intermediary component that simplifies the connection between the handle and weight elements. This mediator enables easy attachment and detachment of weights, making the adjustment process user-friendly despite the modular complexity of the system.
3Ease of operation
If vertically stackable weights with aligned receiving spaces are used, then the ease of assembly and weight selection is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The weight elements incorporate asymmetric features such as tapered edges or indexing protrusions that guide proper vertical stacking orientation. This asymmetric design provides mechanical guidance that compensates for minor manufacturing variations, ensuring correct alignment without requiring extremely tight tolerances.
Solution Approach 2:
The receiving spaces and weight interfaces are pre-configured with alignment features during manufacturing, such as guide rails or positioned reference surfaces. This preliminary alignment preparation ensures that when weights are stacked, they naturally self-align vertically without requiring high-precision manual adjustment during assembly.
Data Source
AI summary
A dumbbell system a plurality of weights vertically stackable on top of each other and each of the weights has a pair of outer edges disposed oppositely from each other to define a first lateral edge and a second lateral edge. The weights each have a centrally displaced opening vertically extending therethrough and defining a receiving space. The receiving space of each weight is vertically aligned with the receiving space of each of the other weights. A handle is removably extendable into the receiving space. A coupler releasably engages a selected one of the weights to the handle and defines a coupled weight. The coupled weight and each of the weights positioned above the coupled weight is releasably secured to the handle. Each of the weights positioned below the coupled weight are disengaged from the handle.