Illuminated Load Control Keypad With Modular Faceplate Assembly
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Solution Overview
Problem
Home automation systems face challenges in designing compact, modular, and aesthetically pleasing control devices that can mount outside electrical wall boxes, providing flexibility in button placement and easy connection to various electrical loads while maintaining structural integrity and aesthetic appeal.
Innovation Solution
The control device features a compact faceplate subassembly with posts that secure a circuit board and back cover to the faceplate, allowing buttons to be mounted outside the wall box perimeter, and includes a main control module subassembly that adjusts power delivery to electrical loads and illuminates buttons for feedback, enabling flexible design and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If buttons are mounted outside the wall box perimeter for flexible design, then aesthetic appeal and design flexibility are improved, but structural integrity and mounting stability may worsen
Solution Approach 1:
The control device is divided into separate modules: a faceplate subassembly containing buttons that can be positioned outside the wall box, and a main control module subassembly containing the control electronics. This segmentation allows the button array to be aesthetically positioned while the mounting structure remains within the wall box, resolving the contradiction between design flexibility and structural integrity.
Solution Approach 2:
The faceplate subassembly is nested within or adjacent to the main control module subassembly, with the faceplate containing buttons that extend beyond the wall box perimeter while the main module remains mounted within the wall box. This nested arrangement allows aesthetic button placement while maintaining structural stability through the main module's secure mounting.
2Ease of manufacture
If a compact faceplate subassembly is used to mount outside wall boxes, then ease of installation and design flexibility are improved, but device complexity may worsen
Solution Approach 1:
The device is segmented into a faceplate subassembly and a main control module subassembly that can be manufactured separately and then easily connected. The faceplate subassembly includes a mounting structure with posts that extend into the wall box, allowing it to be pre-assembled and then simply attached to the main module, reducing installation complexity despite the modular design.
3Ease of operation
If visual indicators are illuminated to provide user feedback, then usability and user feedback are improved, but energy consumption may worsen
Solution Approach 1:
The visual indicators are illuminated periodically or on-demand rather than continuously. The control module can activate LED indicators near the faceplate to provide user feedback about system state, button presses, or errors only when needed, reducing energy consumption while maintaining effective user communication.
Data Source
AI summary
A control device for controlling power delivered to an electrical load includes a faceplate subassembly and a main control module. The faceplate subassembly includes a faceplate, a button, a circuit board, and a back cover. The faceplate includes a front surface and an opposed rear surface, and an opening extending therebetween with the button disposed in the opening in the faceplate. The back cover is positioned adjacent to the circuit board and defines a plurality of holes. A shaft of a post extending from the faceplate is disposed in one of the holes in the back cover and an end of the post is enlarged such that the back cover is captured between the end of the post and the rear surface of the faceplate. The main control module is configured to cause power delivered to the electrical load to be adjusted in response to depression of the button.