Dumbbell Quick Release Structure for Rapid Weight Adjustment
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Solution Overview
Problem
Conventional dumbbells with adjustable weights are time-consuming to reconfigure due to the laborious process of rotating locking shafts to replace counterweights.
Innovation Solution
A quick release structure featuring a handling assembly with engagement assemblies and locking elements that allow for easy removal and reattachment of counterweights, enabling rapid weight adjustments by rotating the locking elements between engaging and disengaging positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional locking shafts are rotated to replace counterweights, then the dumbbell can be adjusted to different weights, but the adjustment process becomes time-consuming and laborious
Solution Approach 1:
The locking mechanism is divided into separate components: a locking shaft with external threads and a retainer with internal threads. This segmentation allows the locking shaft to be quickly inserted and secured by simply rotating it to engage the threads, rather than using a complex conventional locking mechanism. The retainer can be quickly released by rotating the locking shaft, enabling rapid counterweight replacement.
Solution Approach 2:
Instead of having the locking shaft thread into the handle body as in conventional designs, the invention inverts the threading arrangement: the locking shaft has external threads that screw into the retainer, which is fixed in the handle. This inversion simplifies the locking action to a simple rotational movement that quickly secures or releases the counterweights.
2Reliability
If conventional locking shafts are rotated reversely to fix new counterweights, then the counterweights are securely attached, but the process requires multiple reverse rotations increasing complexity
Solution Approach 1:
The invention extracts the threading function from the handle body and places it in a separate retainer component. The locking shaft with external threads engages with the retainer's internal threads, separating the fixation function from the main handle structure. This extraction simplifies the overall mechanism by concentrating the threading interaction in a dedicated locking assembly rather than distributing it across multiple handle components.
Data Source
AI summary
A dumbbell with a quick release structure contains: a handling assembly, two engagement assemblies, multiple counterweights, and two locking elements. The handling assembly includes a handle. A respective one engagement assembly is connected each of two ends of the handle and includes a retainer driven to move toward an engaging position and a disengaging position from the two ends of the handle. A respective one counterweight includes a connection orifice. A respective one locking element includes a screw column and a head disc. When the retainer of the respective one engagement assembly is located at the engaging position, the screw column is screwed with the retainer; when the retainer of the respective one engagement assembly is located at the disengaging position, the screw column is removed from the retainer.