Junction Box Cover Assembly Flush Mount Design
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Solution Overview
Problem
Existing junction box cover assemblies are aesthetically unsightly due to protruding facia mounting plates and often result in surface cracking and difficult installations, especially when attempting to achieve a flush mount without separate canopies.
Innovation Solution
A junction box cover assembly comprising an adapter plate, a patch for wall or ceiling mounting, and a hub with a screed edge, allowing for a flush finish and secure attachment using joint compound and mechanical fasteners, with an insert for fixtures and wire passage, eliminating the need for a canopy and minimizing surface damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a facia mounting plate is used to cover the junction box opening, then the junction box is covered and fixtures can be mounted, but the plate protrudes from the wall surface creating an unsightly appearance
Solution Approach 1:
The invention transitions from a protruding plate solution to a flush-mounted solution by adding a patch that extends behind the wall surface. This allows the cover assembly to be installed in a different dimensional configuration - flush with the wall rather than protruding - thereby resolving the aesthetic contradiction while maintaining installation simplicity.
Solution Approach 2:
The cover assembly is divided into separate components: a patch for flush mounting, an adapter plate for covering the junction box, and a hub for fixture mounting. This segmentation allows each component to perform its specific function optimally - the patch provides flush mounting, the adapter plate provides coverage, and the hub provides mounting capability - thereby resolving the contradiction between aesthetics and functionality.
2Shape
If a flush mount system is used to achieve a clean wall surface, then aesthetic appearance is improved, but surface cracking occurs and installation becomes difficult
Solution Approach 1:
The system is segmented into a patch component and separate mounting components. The patch is specifically designed to be mounted flush against the wall surface and covered with joint compound, eliminating surface cracking. The adapter plate and hub are separate components that attach to the patch, allowing for straightforward installation without the complexity and cracking issues of integrated flush mount systems.
Solution Approach 2:
The patch acts as an intermediary element between the wall surface and the adapter plate/hub assembly. It provides a stable, crack-free mounting surface that is flush with the wall, while simultaneously providing attachment points for the adapter plate and hub. This intermediary resolves the contradiction by enabling flush mounting without the installation difficulties and surface cracking of prior art systems.
3Shape
If a separate canopy is used to achieve flush mounting, then aesthetic appearance is improved, but device complexity increases
Solution Approach 1:
The invention merges the functions of the patch, adapter plate, and hub into a single integrated assembly that is installed as one unit. The patch provides flush mounting, the adapter plate provides junction box coverage, and the hub provides fixture mounting - all in one assembly. This merging eliminates the need for separate canopies and reduces overall device complexity while maintaining aesthetic appearance and functionality.
Data Source
AI summary
A junction box cover assembly for mounting a fixture on a wall or ceiling. The assembly includes an adapter plate for being mounted on a junction box. A patch for supporting the cover assembly on the wall or ceiling in a mounted condition is provided. The patch is adapted to rest flush against the wall or ceiling and to be covered by and embedded in a joint compound. A hub having a body is insertable through openings of the patch and the adapter plate. The assembly includes elements for securing the hub to the adapter plate and elements for securing the hub to the patch. An insert is attachable to the hub for mounting a fixture or providing a blank-up cover.