Sliding Junction Box Cover for Plug Clearance
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Solution Overview
Problem
Existing in-use covers for electrical junction boxes are difficult to work with, repair, and replace due to their permanent attachment via hinges or springs, which often interfere with plugs, cords, and surrounding structures, and fail to provide complete coverage against environmental hazards.
Innovation Solution
A modular in-use cover design featuring a base plate with recessed component ports and a removable cover cap that allows for complete closure and easy maintenance, using a gasket for sealing against water and moisture, with adjustable ports and knockouts for accommodating various electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover is permanently attached by hinges or pivots, then the cover can be biased closed by springs to protect against environmental hazards, but the cover becomes difficult to work with, repair, and replace
Solution Approach 1:
The cover is divided into separate components: a base plate that attaches to the electrical box and a cover cap that attaches to the base plate. This segmentation allows the cover cap to be easily removed and replaced for maintenance while the base plate remains installed, resolving the contradiction between reliable protection and ease of repair.
2Volume of moving object
If the cover has a low profile, then the cover is more compact, but the cover cannot close completely when plugs or cords are inserted into outlets
Solution Approach 1:
The base plate includes a rearward extension that projects behind the front surface of the electrical box, creating additional depth in the rearward direction. This dimensional extension provides the necessary space for plugs and cords while maintaining a compact profile, allowing the cover cap to close completely and provide full protection.
3Adaptability or versatility
If the cover has a larger profile, then the cover can accommodate plugs and cords, but the cover becomes boxier and bulkier, interfering with surrounding structures
Solution Approach 1:
Instead of increasing the cover's profile in the forward direction (which would cause bulkiness), the base plate extends in the rearward direction behind the electrical box. This directional change provides the necessary accommodation space for plugs and cords without increasing the cover's bulk or interfering with surrounding structures.
4Reliability
If the cover is hinged or pivoting, then the cover can be biased closed, but the hinge or spring mechanism interferes with the placement of plugs, cords, timers, and transformers
Solution Approach 1:
The cover design removes the hinge and spring biasing mechanisms from the system entirely. The base plate attaches directly to the electrical box with fixed attachment means, and the cover cap attaches to the base plate without moving joints. This extraction of the hinge mechanism eliminates interference with plugs, cords, timers, and transformers while maintaining reliable cover closure.
Data Source
AI summary
An in-use cover for an electrical junction box, where the cover cap is selectively attachable to and removable from the base plate through sliding engagement of channels on the perimeter of the base plate and ledges on the perimeter of the cover cap. The cover cap defines a hollow interior that overlays one or more component ports in the base plate when attached to the base plate. The cover cap has a bottom cut-out configured to accommodate plugs or other electrical components connected to the electrical junction box. The base plate has a bottom ledge configured to engage the bottom cut-out. When the cover cap is fully engaged in the base plate, the hollow interior and any electrical components contained therein are effectively sealed from intrusion of most moisture.