Modular Electrical Box with Interchangeable Extension Rings
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Solution Overview
Problem
Conventional electrical box assemblies require multiple sizes to match varying stucco finish thicknesses on exterior walls, necessitating large holes in substrates for installation and increased costs due to multiple part requirements.
Innovation Solution
A modular electrical box assembly with a base unit and interchangeable extension rings that can be configured to match three common stucco finish thicknesses (1⅜", ⅞", and ⅝") by mounting directly to a flat substrate, eliminating the need for large holes and minimizing parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple sizes of electrical boxes are used to match varying stucco finish thicknesses, then the electrical box can be installed flush with the wall finish, but the device complexity and quantity of parts increase
Solution Approach 1:
The electrical box is designed with a universal mounting structure that can accommodate multiple stucco finish thicknesses (13⁄8 inch, 7⁄8 inch, and 5⁄8 inch) using a single box size. The box includes an extension element with varying thickness portions that can be selectively positioned to match different reveal depths, eliminating the need for multiple box sizes while maintaining flush installation capability
Solution Approach 2:
The electrical box is divided into separate functional components: a main box body and a removable extension element. The extension element is further segmented into multiple thickness portions (13⁄8 inch, 7⁄8 inch, and 5⁄8 inch) that can be selectively positioned. This segmentation allows a single box to perform the function of multiple boxes with different thicknesses
2Adaptability or versatility
If conventional electrical boxes are used, then multiple box sizes are required for different stucco depths, but this increases the quantity of parts and installation complexity
Solution Approach 1:
A single electrical box design serves multiple functions by accommodating three different stucco finish thicknesses through the selective positioning of extension elements. The universal design eliminates the need to stock and install multiple different box sizes, reducing part quantity while maintaining adaptability to various reveal depths
Solution Approach 2:
The extension element is designed to be movable and repositionable within the box structure, allowing dynamic adjustment between different thickness configurations. This dynamic capability enables a single static box to adapt to varying installation requirements without requiring multiple fixed-size boxes
3Manufacturing precision
If electrical boxes are designed for different stucco thicknesses, then each box size can be optimized for specific applications, but the ease of manufacture decreases due to multiple part requirements
Solution Approach 1:
The extension element is manufactured as a separate component with pre-formed thickness portions corresponding to different stucco depths. This segmentation allows the main box body to be produced in a single standard size, while the extension elements are produced in standardized thickness variations. The modular approach simplifies manufacturing compared to producing entirely different box sizes for each application
Solution Approach 2:
The extension element merges multiple thickness functions into a single component that can be attached to one standard box body. Instead of manufacturing separate boxes for each stucco thickness, the design combines a universal box with a multi-functional extension element, reducing the total number of manufacturing operations and tooling requirements
Data Source
AI summary
A pan box assembly for fixtures for use on exterior walls. The box assembly includes a base unit, which is mounted directly to a flat surface substrate, and two extension elements. The unit, along with the extension elements, allows for modification of certain dimensions of the box assembly so that it can be used with three different finish thicknesses. The extension elements may be added or removed without uninstalling the box or removing the back of the box.