Weight-Adjustable Dumbbell Stopping Mechanism
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Solution Overview
Problem
Existing weight-adjustable dumbbells pose safety hazards due to the risk of dumbbell discs falling out when in a semi-engaged state during use, leading to potential injuries.
Innovation Solution
A weight-adjustable dumbbell design featuring a grip bar assembly with synchronously rotating hanging discs and a stopping mechanism, including locking components and limiting holes, which ensures the dumbbell discs are fully engaged or disengaged, preventing accidental lifting and reducing the risk of injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hanging disc is rotated between two setting positions to adjust weight, then the weight adjustment flexibility is improved, but the dumbbell disc may disengage from the grip bar assembly causing safety hazards
Solution Approach 1:
The locking component performs a preliminary locking action on the hanging disc at intermediate positions before full engagement is achieved. This preliminary action prevents the dumbbell disc from disengaging during the weight adjustment process, resolving the safety hazard while maintaining weight adjustment flexibility.
Solution Approach 2:
The locking component acts as an intermediary mechanism between the hanging disc and the dumbbell disc. It provides an additional securing interface that ensures the dumbbell disc remains engaged even when the hanging disc is in intermediate positions during rotation, thus preventing accidental disengagement.
2Reliability
If a locking mechanism is added to prevent semi-engaged state, then the safety is improved, but the device complexity increases
Solution Approach 1:
The locking component is merged with the existing hanging disc assembly, sharing the same rotational movement and integration points. This combining approach adds the safety function without requiring a completely separate locking mechanism, thus minimizing the increase in device complexity while improving user safety.
Solution Approach 2:
The locking component is designed to automatically engage and disengage based on the rotational position of the hanging disc. It self-activates when the hanging disc reaches intermediate positions and self-releases when full engagement is achieved, eliminating the need for additional control mechanisms and reducing overall system complexity.
Data Source
AI summary
Provided is a weight-adjustable dumbbell, including a grip bar assembly, a dumbbell seat, a plurality of dumbbell discs placed on the dumbbell seat; the grip bar assembly includes a plurality of hanging discs arranged adjacent to each other and are rotated synchronously, and the hanging discs are rotated relative to the dumbbell discs to setting positions to engage with or disengage from the dumbbell discs. The grip bar assembly also includes at least one stopping mechanism, each stopping mechanism includes at least one locking component, and the dumbbell seat is provided with a limiting hole for the locking component to be engaged with. When the hanging discs are rotated to a setting position, the locking component is disengaged from the limiting hole to maintain an unlocked state. When the hanging discs are rotated between two setting positions, the locking component is inserted into the limiting hole to maintain a locked state.