Dual-Drum Cable Reel Layout for Longer Reach Without Overheating
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Solution Overview
Problem
Existing extension cable reels require a secondary extension cord, which is cumbersome to carry and easily tangled, and have limitations on length due to overheating concerns, necessitating a solution that allows extended reach without tangling and overheating.
Innovation Solution
A dual-drum extension cable reel design with electrical communication between cables on both drums via slip rings and contact springs, allowing power transfer regardless of drum rotation or layout, and featuring accessible external faces for sockets and accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single drum with one cable is used, then the structure is simple, but the working distance is limited and a secondary extension cord is needed
Solution Approach 1:
The single drum is divided into two drums (first drum and second drum), each carrying its own cable. This segmentation allows the system to provide extended working distance through multiple cables while keeping each individual cable manageable in length and reducing the need for secondary extension cords.
Solution Approach 2:
The patent combines multiple cables and drums into a single integrated extension cable reel device. Both cables are mounted on the same reel with a shared housing, circuit breaker, and retrieval mechanism, creating a unified system that provides extended reach without requiring separate secondary extension cords.
2Length of moving object
If a secondary extension cord is added, then the working distance is extended, but the device becomes cumbersome to carry and the cord easily tangles
Solution Approach 1:
Instead of using one very long cable that must be manually managed, the system segments the total length into two separate cables on separate drums. Each cable can be independently retrieved and managed, eliminating the tangling problems associated with long single cables and making the overall device more manageable.
Solution Approach 2:
The system provides dynamic cable management where each drum can rotate independently to pay out or retrieve its cable as needed. This dynamic mechanism allows the user to control cable deployment precisely, avoiding the tangling and management issues of static, manually coiled extension cords.
3Length of moving object
If cable length is increased, then the working distance is extended, but overheating risk increases
Solution Approach 1:
The total cable length is divided into two separate cables, each with its own circuit breaker protection. This segmentation reduces the current load and heat generation in each individual cable compared to a single long cable, while still providing the same total working distance. The circuit breakers on each drum provide independent overheating protection.
4Length of moving object
If multiple drums are used, then the working distance is extended and overheating risk is reduced, but the device complexity increases
Solution Approach 1:
Despite having two drums, the patent merges many functions into shared components: a single housing contains both drums, a single retrieval mechanism can service both drums, and the overall device is treated as one integrated unit. This merging approach mitigates the complexity increase that would otherwise result from having two separate cable systems.
Solution Approach 2:
The retrieval mechanism and housing are designed to serve multiple functions: the housing protects both drums and cables, the retrieval mechanism can wind either or both drums, and the circuit breakers provide protection for both cable systems. This multi-functionality reduces the number of separate components needed, offsetting the complexity of having two drums.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables extended working distance without a secondary cord, reduces overheating risk, and provides balanced handling with distributed weight, while allowing multiple accessories on both drum faces.
Implementation Method 1
Each electrical cable is in electrical communication at all times with an electrical cable on at least one other drum so that power can be communicated from a free end of one cable to a free end of a second cable
Data Source
AI summary
An extension cable reel comprising a central body with an axle extending both directions from the central body. Freely rotatably mounted on the axle are at least two drums, at least one on each side of the central body. Each drum comprises a length of cable (for electrical or data connection) or hose (for fluid connection), the cable or hose reversibly windable around the drum. Each cable or hose on a first side of the central body is in electrical or fluid communication with at least one cable or hose on the second side of the central body. Each cable on the first side has a plug at its free end and each cable on the second side has at least one socket at its free end. Each hose has at least one fluid connection at its free end.