Temporary Cover Assembly for Electrical Box with Spring Detents
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Solution Overview
Problem
Conventional methods for installing electrical devices in junction boxes are inefficient due to the need for early installation, potential for device damage, and difficulties in accommodating changes in drywall thickness or design, leading to costly replacements and inconvenient adjustments using multiple threaded screws.
Innovation Solution
A cover assembly with a box cover plate and extension ring featuring spring detents and a temporary cover that allows for adjustable depth and easy installation, eliminating the need for adjustment screws and enabling quick, secure mounting of electrical devices through a pre-assembled unit that can be installed with minimal lead time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If electrical devices are installed early in the process, then the installation timeline is established, but the risk of device damage and costly replacements increases
Solution Approach 1:
The cover assembly is divided into separate components: a cover plate that mounts to the electrical box, and a removable temporary cover that protects the opening. This segmentation allows the electrical box to be installed early while the device itself remains protected and replaceable later without damaging the box or surrounding structures.
Solution Approach 2:
The temporary cover acts as an intermediary protective element between the installed electrical device/box and the harsh construction environment. It shields the opening and surrounding areas from drywall dust, damage during wall installation, and other construction-related hazards, allowing early installation without compromising device safety.
2Adaptability or versatility
If adjustable-depth mud rings are used, then accommodation of different wall thicknesses is possible, but the adjustment process becomes complex requiring multiple threaded screws
Solution Approach 1:
The cover plate includes an adjustable extension ring that can be moved axially to different positions depending on wall thickness requirements. This dynamic adjustment allows the same cover assembly to adapt to various wall depths without requiring complex multi-screw mechanisms, achieving versatility through simple positional adjustment.
3Loss of time
If electrical devices are purchased early, then installation readiness is ensured, but cash flow is negatively impacted
Solution Approach 1:
The electrical box and cover assembly are installed early in the construction process, establishing the infrastructure readiness. However, the actual electrical devices can be purchased and installed later when needed, allowing preliminary preparation without premature device purchase, thus maintaining cash flow while ensuring installation readiness.
4Device complexity
If the cover plate has a central opening without protruding collar, then simplified design is achieved, but secure mounting of extension ring becomes more difficult
Solution Approach 1:
Instead of using a mechanical protruding collar for mounting, the design uses spring detent devices that engage with corresponding features on the extension ring. This substitution replaces a complex mechanical collar structure with simpler spring-based detents that provide secure mounting while maintaining a clean, collarless appearance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for quick and easy installation of electrical devices, accommodating various wall thicknesses and enabling last-minute design changes, reducing the risk of damage and costly replacements, while minimizing lead time for purchasing components.
Implementation Method 1
Spring detent devices are provided on the box cover plate at opposite edges of the central opening for engaging an extension ring received in the central opening of the mud ring.
Data Source
AI summary
A temporary cover for covering a central opening in an electrical box cover plate is disclosed. The cover has a front wall, a side wall forming a rim around the periphery of the front wall, a connecting mechanism on the rim for releasably connecting the temporary cover to the box cover plate in a position in which the front wall of the temporary cover is spaced forward from the central opening in the box cover plate, and a release mechanism on the front wall for removing the temporary cover from the box cover plate. The rim of the temporary cover is configured to function as a guide for guiding a cutting tool to cut an opening in the wall member prior to installing an electrical device in the electrical box. A cover assembly including such a temporary cover is also disclosed.