Door Handle Shaft Integrates Electrical Device and Interlock
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Solution Overview
Problem
Existing electrical systems with tap-off devices and interlock mechanisms require many moving parts and do not effectively integrate door operation with interlock securement, leading to inefficiencies and safety concerns.
Innovation Solution
A single shaft actuating mechanism is used to operate an electrical device and interlock mechanism, where the handle on the door rotates a shaft to toggle the device's status and simultaneously engage or disengage the interlock device with a busway structure, simplifying the system by reducing the number of moving parts and integrating door operation with interlock securement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single shaft actuating mechanism is used to operate both the electrical device and interlock mechanism, then device complexity is reduced and ease of operation is improved, but reliability may be compromised due to the integrated nature of the mechanism
Solution Approach 1:
The patent combines the door operation mechanism and interlock securement mechanism into a single integrated shaft actuating system. The external operating handle on the door is directly coupled to a shaft that simultaneously controls both the electrical device status and the interlock device engagement with the busway structure, eliminating the need for separate actuating mechanisms
Solution Approach 2:
The shaft serves multiple functions: it acts as the actuating mechanism for the electrical device, the securement mechanism for the interlock device, and the coupling element between door operation and interlock engagement. This multi-functional design reduces the overall number of components while maintaining operational safety through the inherent mechanical interdependencies
2Reliability
If separate mechanisms are used for door operation and interlock securement, then reliability is improved through independent control, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent integrates the door operation mechanism and interlock securement mechanism into a single unified system where one shaft performs both functions, reducing the total number of moving parts and simplifying the overall mechanism while maintaining operational safety through mechanical interdependencies
3Reliability
If separate mechanisms are used for door operation and interlock securement, then reliability is improved through independent control, but ease of operation worsens due to multiple controls required
Solution Approach 1:
The external operating handle on the door serves as a universal control that simultaneously operates both the electrical device and the interlock mechanism through the coupled shaft, eliminating the need for separate controls and simplifying the user interaction to a single intuitive door operation
Data Source
AI summary
An electrical system includes an enclosure for housing an electrical device. The enclosure includes a door with an operating handle connected to a shaft when the door is closed, which can then be used to turn the electrical device on or off. The shaft rotation is further operable to simultaneously displace an interlock mechanism for engagement or disengagement to a busway structure.