Adjustable Dumbbell Selector Mechanism for Fast Weight Changes
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Solution Overview
Problem
Traditional dumbbells require frequent disassembly and reassembly for load changes, and existing adjustable dumbbells face limitations in load range and increment size, safety, and bulkiness, necessitating improvements in weight selection and retention mechanisms.
Innovation Solution
An adjustable dumbbell system with a handle assembly and dual selector mechanisms, allowing for sequential coupling and decoupling of weights using rotatable engagement structures and gear trains, ensuring secure weight retention and efficient load adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional dumbbells are used, then each dumbbell has a fixed load, but users need many different dumbbells to perform varied exercises
Solution Approach 1:
The dumbbell system uses a universal base unit that can accommodate multiple weight plates of different masses. The base unit includes a standardized interface and selection mechanism that works with various weight configurations, allowing one dumbbell to perform multiple load settings instead of requiring separate dumbbells for each weight.
Solution Approach 2:
The weight plates are designed to nest within the base unit structure. The base unit contains a storage compartment or guide mechanism that holds multiple weight plates in a compact arrangement, allowing them to be stacked or nested when not in use, reducing the space required for multiple dumbbells.
2Measurement precision
If adjustable dumbbells with smaller load increments are used, then load precision is improved, but the dumbbell length and overall size increase
Solution Approach 1:
The selection mechanism transitions from a linear arrangement where weight plates are stacked along the dumbbell length to a rotational or lateral selection system. The base unit incorporates a dial, knob, or sliding mechanism that operates in a different dimensional space, allowing precise load selection without extending the dumbbell's primary length.
Solution Approach 2:
The weight selection system is segmented into discrete, modular components. Each weight plate is a separate module that can be independently selected and attached to the base unit. The selection mechanism is divided into distinct positions or settings corresponding to specific weight combinations, allowing precise increment selection without requiring a continuous or overly long structure.
3Weight of moving object
If heavier load adjustable dumbbells are used, then overall load range is improved, but load increment size increases
Solution Approach 1:
The dumbbell system dynamically adapts its load increment size based on the selected weight range. The selection mechanism allows users to choose from different weight plate combinations, and the system provides finer increments for lighter loads and larger increments for heavier loads, optimizing precision across the entire load range rather than maintaining a fixed increment size.
Solution Approach 2:
The system changes the effective load increment parameter based on the configuration of weight plates selected. By allowing different combinations of weight plates with varying masses, the system can provide small increments when light plates are selected and larger increments when heavy plates are selected, thereby maintaining both wide load range and appropriate precision for each weight level.
4Device complexity
If manual weight selection and engagement systems are used, then device complexity is reduced, but operation time and effort increase
Solution Approach 1:
The weight plates are pre-organized and pre-positioned within the base unit according to the selection mechanism's requirements. The base unit includes guide rails, storage compartments, or magnetic holders that keep weight plates in predetermined positions, ready for quick engagement. This preliminary arrangement eliminates the need for users to manually search for, handle, and align weight plates during exercise transitions.
Solution Approach 2:
The patent introduces an intermediary engagement mechanism between the weight plates and the dumbbell handle. This intermediary system includes automatic or semi-automatic coupling devices, such as spring-loaded latches, magnetic attractors, or cam-based lockers, that facilitate rapid weight plate attachment and detachment without requiring manual threading or complex fastening operations.
Data Source
AI summary
An adjustable dumbbell may include a handle assembly and multiple weights connected to the handle assembly. The weights may be selected in sequence in order to determine the desired weight for use. The weights may be positioned on ends of the handle assembly and may rest within a base when not in use. The handle assembly itself may be removed while the weights remain in the base. The system may be controlled manually by a rotational motion or may be controlled by an automated or semi-automated system.