Polyphase Extension Cord with Multi-Voltage Sockets

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Solution Overview

Problem

Existing extension cords are designed for single voltage use, leading to a messy and unsafe environment in temporary settings like construction sites and exhibition venues, where various electrical equipment with different voltage requirements necessitate multiple extension cords, increasing the risk of incorrect voltage usage and accidents.

Innovation Solution

A polyphase voltage conversion extension cord with a socket body featuring a four-phase power connective head, breaker, and polyphase circuit that allows for multiple voltage options (three-phase 220 V, single-phase 220 V, and single-phase 110 V) through a single breaker, reducing the need for multiple cords and enhancing safety and convenience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple extension cords with different voltages are used to meet various electrical equipment requirements, then power usage versatility is improved, but the complexity of cable arrangement and safety risks increase

Engineering Contradiction:
Improvepower usage versatilityVSAvoidcable arrangement complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The extension cord incorporates multiple power sockets with different voltage specifications (220V and 110V) within a single device. The socket body includes a first power socket for 220V equipment and a second power socket for 110V equipment, allowing one extension cord to serve multiple voltage requirements simultaneously, thereby reducing the need for multiple separate extension cords and simplifying cable management.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple extension cords with different voltages are deployed to satisfy diverse power needs, then adaptability to different electrical equipment is improved, but the risk of incorrect voltage usage and accidents increases

Engineering Contradiction:
Improveadaptability to electrical equipmentVSAvoidpower usage safety
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

Each power socket within the extension cord is specifically designed with its voltage specification clearly marked. The first power socket is designated for 220V equipment with corresponding labeling, while the second power socket is designated for 110V equipment with its own labeling. This localized identification system ensures that users can quickly and accurately select the appropriate socket for their equipment, eliminating confusion and preventing incorrect voltage connections that could lead to safety accidents.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS11502462B1Extension cord for polyphase voltage conversion
Publication Date: 2022.11.15 KO PO CHENG
  • US11502462B1 patent drawing
  • US11502462B1 patent drawing
  • US11502462B1 patent drawing

AI summary

An extension cord for polyphase voltage conversion includes a socket body, a conductive cable and a polyphase circuit disposed in the socket body. The socket body has a hollow housing, and a four-phase power connective head is disposed at an end of the housing in order to supply power to the extension cord. A breaker having safety switch function and at least two power sockets providing voltages with different phases are disposed in the housing. An end of the conductive cable is electrically connectable with a four-phase power source. The other end of the conductive cable has a four-phase power plug electrically connectable with the four-phase power connective head of the socket body. The polyphase circuit includes three phase conductors, a neutral conductor and a ground conductor. The conductors are used to electrically connect with the four-phase power connective head, the breaker and the respective at least two power sockets.