Adjustable Dumbbell Plate Units With External Pin Locking
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Solution Overview
Problem
Existing adjustable dumbbells have complicated structures and are inconvenient to adjust weight, with dumbbell plate units prone to shaking during use.
Innovation Solution
A novel adjustable dumbbell design featuring a handle, counter weights with dumbbell plate groups, positioning frames, and positioning pins that allow for simple plugging and unplugging to adjust weight, while stabilizing the plate units through a locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complicated internal locking mechanism is used to adjust weight, then weight adjustment capability is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The counter weight is divided into multiple independent dumbbell plate units that can be selectively assembled. Each plate unit is a separate module that can be independently added or removed from the dumbbell, allowing weight adjustment without complex internal mechanisms. The positioning frame provides standardized mounting positions for these modular plate units.
Solution Approach 2:
The locking mechanism is extracted from the internal structure and replaced with an external positioning system. The positioning pin inserted into positioning holes on the positioning frame provides a simple external locking method that eliminates the need for complicated internal locking mechanisms, while still achieving secure weight adjustment.
2Adaptability or versatility
If a complicated internal locking mechanism is used to adjust weight, then weight adjustment capability is improved, but ease of operation deteriorates
Solution Approach 1:
The counter weight is divided into multiple independent dumbbell plate units that can be selectively assembled. Each plate unit is a separate module that can be independently added or removed from the dumbbell, allowing weight adjustment without complex internal mechanisms. The positioning frame provides standardized mounting positions for these modular plate units.
Solution Approach 2:
The locking mechanism is extracted from the internal structure and replaced with an external positioning system. The positioning pin inserted into positioning holes on the positioning frame provides a simple external locking method that eliminates the need for complicated internal locking mechanisms, while still achieving secure weight adjustment.
3Device complexity
If a simple locking mechanism is used, then device complexity is reduced, but reliability of locking deteriorates causing plate units to shake
Solution Approach 1:
The positioning pin combines multiple functions into a single component: it acts as both a locating element (guiding the plate unit to the correct position) and a locking element (securing the plate unit in place). This merged design achieves reliable locking without increasing structural complexity, as the same simple pin performs both positioning and securing functions.
4Reliability
If multiple plate units are locked together, then stability is improved, but ease of removing individual plates deteriorates
Solution Approach 1:
The locking mechanism is extracted from the internal structure and replaced with an external positioning system. The positioning pin inserted into positioning holes on the positioning frame provides a simple external locking method that eliminates the need for complicated internal locking mechanisms, while still achieving secure weight adjustment.
Solution Approach 2:
The positioning frame acts as an intermediary structure between the dumbbell handle and the plate units. It provides standardized positioning holes that guide and secure the plate units without requiring direct complex locking mechanisms between each plate and the handle. This intermediary framework simplifies both locking and removal operations.
Data Source
AI summary
Provided is a novel adjustable dumbbell, including a handle and counter weights arranged on two sides of the handle, where each of the counter weights takes a dumbbell plate group as a weight core and is limited by a positioning frame; meanwhile, through cooperation of a positioning pin, a mounting hole in the positioning frame and a dumbbell plate unit re-positioning hole, the dumbbell plate unit can be increased/reduced through simple plugging and unplugging of the positioning pin, so that the weight of the dumbbell can be increased/reduced. The novel adjustable dumbbell is simple in structure and convenient to operate.