Selector-Pin Weight Stack for Fast Adjustable Fitness Resistance
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Solution Overview
Problem
Conventional adjustable-weight fitness apparatuses require complex and time-consuming operations to adjust the weight.
Innovation Solution
A fitness apparatus with a handle, housing, and stackable weights, featuring a pin that allows for quick and easy weight adjustment by selectively positioning weights using a coupling plate and pin system, enabling rapid weight changes without handling individual weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional adjustable-weight fitness apparatuses use traditional weight adjustment mechanisms, then weight adjustment is possible, but the operation becomes complex and time-consuming
Solution Approach 1:
The weight stack is divided into multiple individual weight plates that can be independently selected and engaged. Each weight plate is separated and can be individually positioned on the selector pin, allowing users to quickly assemble desired weight combinations without complex mechanisms.
Solution Approach 2:
A selector pin acts as an intermediary component that engages with specific weight plates in the stack. The pin selectively positions and secures chosen weights to the handle, enabling rapid weight changes without requiring users to manually handle and stack individual weights each time.
2Adaptability or versatility
If conventional fitness apparatuses use complex adjustment mechanisms, then weight selection is precise, but the device complexity increases
Solution Approach 1:
The weight system is segmented into discrete, standardized weight plates stacked in a compact arrangement. This segmentation allows for precise weight selection through simple plate combination while avoiding complex adjustment mechanisms.
Solution Approach 2:
The selector pin and weight stack design serves multiple functions: it enables weight selection, secures weights to the handle, and allows quick release and reconfiguration. This multi-functionality reduces the need for separate complex mechanisms for each operation.
Data Source
AI summary
A fitness apparatus for adjustable resistance training includes a handle and one or two weight assemblies, configured as a kettlebell, dumbbell, or barbell. Each weight assembly comprises a housing fixedly connected to the handle, a pin movably connected to the housing, and a plurality of stacked weights adapted to fit within the housing. The pin selectively engages one weight, allowing precise weight adjustment. When the handle lifts the housing, the selected weight and all weights above are lifted together. In a kettlebell embodiment, a single weight assembly is attached to the handle. In a dumbbell embodiment, two weight assemblies are fixed to opposite ends of the handle. In a barbell embodiment, the handle comprises two detachably connected rods, each rod with a weight assembly at its free end. This configuration allows users to easily adjust the resistance by selecting different weights through the pin, accommodating various fitness levels.