Adjustable Dumbbell Hitching Assembly for Rapid Plate Locking

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Solution Overview

Problem

Traditional dumbbells require cumbersome plate replacement, risk injury from improper handling, and necessitate multiple purchases for varying weights, increasing cost.

Innovation Solution

A dumbbell design featuring a dumbbell rod assembly with hitching assemblies and bolts that allow rapid weight adjustment through a hitching mechanism, incorporating a locking mechanism to prevent plate detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional dumbbell plate replacement method is used, then weight adjustment is possible, but the operation becomes cumbersome and time-consuming

Engineering Contradiction:

Improveweight adjustment operationVSAvoidtime for plate replacement

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The dumbbell plate is divided into a plate body and a separate locking component (L-shaped locking piece). The locking piece can be independently operated to secure or release the plate, separating the weight adjustment function from the securing function. This allows users to quickly swap plates by simply detaching and attaching the locking piece without manipulating the entire plate assembly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hitching assembly incorporates a dynamic locking mechanism where the L-shaped locking piece can rotate or move between locked and unlocked positions. This dynamic element enables rapid transition between weight configurations, transforming the static plate replacement process into a quick, movable operation.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If traditional dumbbell plate replacement is performed, then weight switching is achieved, but improper operation may cause injury or damage

Engineering Contradiction:

Improveweight switching capabilityVSAvoidinjury risk and damage risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The hitching assembly includes a receiving space that guides and cushions the locking piece as it engages with the plate body. This pre-positioned receiving structure ensures that the locking mechanism engages smoothly and predictably, preventing sudden movements or slippage that could cause injury or damage during plate replacement.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The L-shaped locking piece acts as an intermediary component between the user's hand and the dumbbell plate. Instead of directly manipulating the heavy plate, users operate the smaller, lighter locking piece which then secures the plate in place. This intermediary reduces the direct handling of heavy weights, minimizing injury risk while maintaining weight switching capability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If multiple dumbbell plates with different weights are purchased for weight adjustment, then weight variability is achieved, but the cost increases

Engineering Contradiction:

Improveweight variabilityVSAvoidnumber of dumbbell plates required

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The dumbbell plate design with the universal hitching assembly and L-shaped locking piece allows a single plate to serve multiple weight functions. The plate can be quickly swapped with other plates of different weights using the same locking mechanism, making one plate assembly as versatile as multiple fixed-weight plates. This multi-functionality reduces the total number of plates needed while maintaining weight variability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If traditional dumbbell fixing pieces are replaced at two ends, then plate securing is achieved, but the operation becomes troublesome

Engineering Contradiction:

Improveplate securingVSAvoidoperation complexity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The L-shaped locking piece combines multiple securing functions into a single component. Instead of replacing separate fixing pieces at two ends of the plate, the unified locking piece simultaneously secures both ends when inserted into the hitching assembly. This merging simplifies the operation from a multi-step process to a single insertion action while maintaining reliable plate securing.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12508463B2Dumbbell capable of adjusting weight rapidly, and dumbbell assembly

Publication Date: 2025.12.30 OHFG TECH (SHANGHAI) CO LTD

AI summary

Provided is a dumbbell capable of adjusting weight rapidly, including a dumbbell rod assembly and dumbbell plates. Hitching assemblies are arranged at two ends of the dumbbell rod; a first baffle is arranged at one end of each of the hitching assemblies; a concave inserting-connection port is formed at the top of each of the dumbbell plates; the dumbbell plates are hitched to the hitching assemblies; the dumbbell sheets are provided with first hitching parts and second hitching parts; a second surface of one dumbbell plate close to the first baffle abuts against the first baffle, and the second hitching parts of the other dumbbell sheets are hitched to the first hitching parts of the adjacent dumbbell plate; and a bolt is inserted into a bolt through hole of the dumbbell plate farthest from the first baffle.