Offset Electrical Adapter Layout for Reduced Cable Strain
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Solution Overview
Problem
Existing electrical adapters with aligned terminal and receptacle assemblies are unsafe due to exposed electrical contacts and suffer from unnecessary strain caused by elevated power source receptacles, leading to potential damage and disconnection issues.
Innovation Solution
An offset electrical adapter design with a vertically offset terminal and receptacle assembly, featuring a non-conductive thermoplastic handle for safe gripping and reduced strain, is proposed. The adapter includes a housing assembly formed by joining a base and cover with mechanical fasteners, with the terminal assembly positioned in an upper cavity and the receptacle assembly in a lower cavity, preventing rotational movement and accommodating a 30-amp to 50-amp power signal adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal assembly and receptacle assembly are aligned within a cylindrical housing, then the adapter can adapt the physical form of power source receptacles, but the user must grip the entire housing which causes fingers to slip and touch exposed electrical contacts
Solution Approach 1:
The adapter is segmented into distinct functional components: a terminal assembly housed in a terminal housing, a receptacle assembly housed in a receptacle housing, and a separate handle assembly. This segmentation allows the electrical contacts to be enclosed in their respective housings while providing a separate gripping surface, eliminating the hazard of exposed contacts during insertion and removal operations.
Solution Approach 2:
A non-conductive handle assembly serves as an intermediary gripping element between the user's fingers and the adapter body. This handle provides a safe gripping surface that is electrically isolated from the conductive components, allowing users to safely insert and remove the adapter without risking contact with exposed electrical contacts.
2Device complexity
If the terminal assembly and receptacle assembly are aligned within a housing, then the adapter structure is compact, but unnecessary strain is placed on the assemblies, wiring, and power cable due to elevated power source receptacles
Solution Approach 1:
The adapter transitions from a two-dimensional aligned configuration to a three-dimensional offset configuration. The terminal assembly and receptacle assembly are positioned at different vertical levels within the housing, with the terminal assembly elevated above the receptacle assembly. This vertical offset creates a more favorable force distribution that reduces bending moments and strain on the electrical wiring and components when the adapter is used with elevated power source receptacles.
3Reliability
If the terminal assembly and receptacle assembly are vertically offset, then strain on components is reduced, but the adapter requires a more complex housing structure with separate cavities
Solution Approach 1:
The housing is segmented into distinct cavities: a terminal cavity for receiving the terminal assembly and a receptacle cavity for receiving the receptacle assembly. These cavities are positioned at different vertical levels within the housing body, allowing the offset configuration while maintaining a relatively simple overall housing structure that can be manufactured as a single piece or assembled from standard components.
4Shape
If power cables dangle toward the earth from elevated receptacles, then gravity creates torque about the adapter, but aligned assemblies suffer from increased strain over time
Solution Approach 1:
The offset vertical arrangement of the terminal and receptacle assemblies changes the geometric relationship between the connection points and the hanging cable. This dimensional change creates a more favorable moment arm distribution that reduces the torque and bending forces transmitted to the electrical wiring and components, thereby improving the structural integrity and longevity of the adapter system.
Data Source
AI summary
An electrical adapter device including a housing assembly and an internal assembly. The housing assembly includes a base and a cover removably joined together using mechanical fasteners. The internal assembly includes a terminal assembly and a receptacle assembly vertically offset from each other to reduce the strain on the components of the device and reduce the chances of an unintended removal of the device from a power source receptacle or the unintended removal of a power cable plug from the device. A handle is disposed and positioned on the cover to provide a non-conductive, thermoplastic handle which may be formed on the cover above a receptacle assembly (i.e., an upper portion of the cover) and partially integrated with the receptacle housing to provide a stable and safe means to grip the device when plugging into or unplugging from a power source.