Five-in-One Rack Outlets With Cord Locking and Chassis Grounding
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Solution Overview
Problem
Existing power distribution units (rPDUs) in electronic equipment racks lack versatility in accommodating multiple plug types and secure grounding, leading to inefficiencies in manufacturing, customization, and potential accidental disconnection of power cords.
Innovation Solution
A dual-row rack power distribution unit (rPDU) with versatile five-in-one outlets that can accommodate C13/C15/C15A/C19/C21 plugs, featuring built-in cord locking levers and direct chassis grounding, allowing for secure plug retention and efficient power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional power distribution units use separate outlets for different plug types, then each outlet type can be optimized for its specific plug, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements a universal outlet design that can accommodate multiple plug types (C13, C14, C15, C16, C19, C20, C21, C22) through a single standardized receptacle configuration. The outlet features adjustable deflectable contact members and a reconfigurable grounding system that can adapt to different plug geometries, eliminating the need for multiple specialized outlets and reducing device complexity while maintaining versatility
Solution Approach 2:
The patent employs deflectable contact members that can dynamically adjust their position and configuration based on the inserted plug type. These spring-loaded contacts automatically reposition to make proper electrical connection with different plug pin arrangements, allowing the outlet to adapt its internal configuration in real-time without manual intervention or complex switching mechanisms
2Reliability
If power cords are not secured to the outlet, then the outlet design remains simple, but accidental disconnection and reliability issues occur
Solution Approach 1:
The patent incorporates self-actuating cord retention features where the deflectable contact members themselves provide both electrical connection and mechanical retention functions. When a plug is inserted, the spring-loaded contacts automatically deflect and engage with the plug body, creating a friction-based retention force that secures the cord without requiring separate locking mechanisms or user intervention
3Reliability
If grounding is not directly connected to the chassis, then the outlet unit can be independently configured, but adequate grounding and safety are compromised
Solution Approach 1:
The patent merges the grounding function with the chassis structure by implementing a direct mechanical and electrical connection between the outlet unit grounding terminal and the rack PDU chassis. The grounding system is integrated into the mounting mechanism, where the outlet unit's ground contact engages with a grounded surface on the chassis during installation, providing adequate grounding without requiring separate grounding wires or complex grounding circuits
Data Source
AI summary
A rack power distribution unit includes a chassis and at least one outlet unit configured to be coupled to the chassis. The at least one outlet unit includes a socket configured to receive at least two types of plugs. The socket includes a locking lever configured to releasably secure a plug within the socket. The socket may be configured to include a grounding tab configured to be coupled to the chassis. The grounding tab is configured to wrap around a base of the at least one outlet unit and is connected to the chassis by a screw fastener.