Electrical Box Backplate Brackets for Puncture Protection
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Solution Overview
Problem
Electrical boxes in walls are vulnerable to inadvertent punctures from nails or tools after installation, posing a risk of damage and electrocution due to the lack of visual indicators for their location on the back side.
Innovation Solution
Installation of sturdy L-shaped brackets with a base plate and flange(s) between the electrical box and the frame member to protect the back of the box before wall covering is applied, using materials like 16 gauge steel or combinations of metal and plastic to prevent punctures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical boxes are made of metal to withstand punctures, then protection against punctures is improved, but cost and weight increase
Solution Approach 1:
The protection system is divided into two segments: the original electrical box (which can be lightweight plastic) and a separate protective backplate (made of sturdy metal). The backplate is attached to the back of the electrical box to provide puncture resistance, while the main box body remains lightweight. This segmentation allows each component to be optimized independently for its specific function.
Solution Approach 2:
The solution combines different materials in a composite structure: the electrical box can be made of lightweight plastic while the protective backplate is made of metal (such as 16 gauge steel). This composite approach allows the system to achieve both lightweight properties and puncture resistance by strategically placing protective material only where needed - at the vulnerable back surface.
2Reliability
If electrical boxes are made of metal to withstand punctures, then protection against punctures is improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the protection function into a separate backplate component, the system allows the main electrical box to be manufactured using inexpensive plastic injection molding, while only the backplate requires metal fabrication. This reduces overall manufacturing cost compared to making the entire box from metal.
Solution Approach 2:
The composite construction uses inexpensive plastic for the box body and only applies costly metal material to the backplate where protection is actually needed. This selective material application significantly reduces material costs while maintaining the required protection level.
3Device complexity
If no protective measure is taken, then device complexity is reduced, but vulnerability to punctures increases
Solution Approach 1:
The protective backplate is designed to be installed during the initial electrical box installation phase, before the drywall is closed up. This preliminary action ensures protection is in place before any potential puncture hazards exist, and the simple attachment process (using existing mounting screw holes) makes it as easy as the original box installation.
Solution Approach 2:
The protective backplate serves as an intermediary element between the electrical box and the external environment (drywall, nails, tools). It mediates the interaction by absorbing and blocking puncture forces before they can reach the electrical box contents, while requiring minimal additional installation steps.
Data Source
AI summary
The present invention provides methods and apparatus for protecting the contents of electrical boxes installed in new or existing buildings before sheetrock, drywall or wallboard is installed, by providing sturdy L-shaped brackets that include at least one insertion flange and a base plate. The flange portions of the bracket may be easily inserted (or removed) between the electrical box and the frame member to which the box is mounted, such that after insertion of the flange, the back of the box is covered and protected by the base plate. After the bracket has been installed, sheetrock, drywall or wallboard behind the electrical box may then be completed. The base plate of the bracket protects the back of the electrical box from inadvertent punctures that could occur since the location of the back of the box may not be easily determined after the wall is completed.