GFCI Button Assembly with Flexible Sealing Frame
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Solution Overview
Problem
Conventional GFCI devices lack effective water and flame barriers, allowing water to seep into housings and failing to contain electrical fires within the enclosure.
Innovation Solution
A water and flame barrier button assembly is integrated into the GFCI housing, featuring flexible sealing frames that allow buttons to extend through the housing while maintaining a rebound force to return to a non-contact position, providing both water and flame resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If buttons are made accessible through the housing, then ease of operation is improved, but water can seep into the housing
Solution Approach 1:
A flexible membrane is positioned over the button opening in the housing, allowing the button to be pressed through the membrane while maintaining water protection. The membrane acts as a flexible barrier that can be deformed during button operation but prevents water penetration when at rest.
Solution Approach 2:
The flexible membrane serves as an intermediary element between the external environment and the internal button mechanism. It transmits the pressing force from the user to the button while blocking water from reaching the button or internal components.
2Ease of operation
If the housing is made open for button access, then ease of operation is improved, but flame containment capability deteriorates
Solution Approach 1:
The flexible membrane provides a continuous barrier that prevents flame and hot gas penetration while allowing mechanical deformation for button operation. This maintains the fire containment integrity of the housing while enabling user interaction.
Solution Approach 2:
The membrane is designed to resist flame penetration in advance, creating a protective barrier before any fire hazard occurs. This preliminary protection ensures that even if combustion occurs inside the housing, the flame cannot escape through the button opening.
3Object-affected harmful factors
If sealing materials are added to prevent water ingress, then water resistance is improved, but device complexity increases
Solution Approach 1:
The flexible membrane serves as both the structural element for button access and the sealing barrier simultaneously. This single-component solution prevents water ingress without requiring additional sealing rings, gaskets, or complex sealing mechanisms.
Solution Approach 2:
The flexible membrane performs multiple functions: it provides the interface for button operation, seals against water penetration, and maintains structural integrity of the housing. This multi-functionality reduces the overall complexity of the sealing system.
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 effectively prevents water ingress and contains electrical fires within the GFCI housing, enhancing the device's operational safety and reliability.
Implementation Method 1
The base portion of the sealing frame contacts the GFCI PCB while providing a rebound force to return either the set or reset button exposed end from a position depressed and in contact with the PCB
Data Source
AI summary
A water and flame barrier button assembly is incorporated into an electrical enclosure such as a GFCI housing to provide water and flame resistant set and reset buttons. The buttons are contained within flexible sealing frames that allow one end of the buttons to extend through the top portion of the GFCI housing while the opposite end of the button is exposed within the base portion of the sealing frame. The base portion of the sealing frame attaches to the interior of the housing with the exposed button end positioned inward of the sealing frame base. The base of the sealing frame contacts the GFCI circuit board while providing a rebound force to return either the set or reset button exposed end from a position depressed and in contact with the circuit board to a position not in contact with the circuit board and returning inward of the sealing frame base.