Light Switch Override Mechanism for Maintenance Safety
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Solution Overview
Problem
Existing remote control systems for mains wired lighting are inconvenient and pose safety issues, as users cannot definitively determine if power is off for maintenance, leading to potential electrical hazards.
Innovation Solution
A wall-mounted light switch with a user input mechanism, wireless receiver, and processor that allows users to enter an override state, preventing remote control activation and providing visual and tactile confirmation of power off, thus ensuring safety during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a remote control system is implemented for mains wired lighting, then convenience and automation are improved, but safety and reliability deteriorate because users cannot definitively determine if power is off
Solution Approach 1:
The system segments control into two distinct modes: remote control mode for convenient operation and manual override mode for safety during maintenance. The physical switch mechanism is separated from the remote control functionality, allowing independent operation of each control method.
Solution Approach 2:
The patent introduces an intermediary indicator mechanism that provides visual feedback about the actual power state. This indicator acts as a mediator between the complex remote control system and the user, providing definitive information about whether power is supplied to the light fitting.
2Extent of automation
If both remote control and physical switch are used to control lighting, then automation is improved, but user confusion increases because the physical switch has no definitive on or off position
Solution Approach 1:
The physical switch dynamically changes its functionality based on the operational mode. In normal operation, it works with remote control. In override mode, it becomes a definitive manual control with clear on/off positions, eliminating user confusion about the switch state.
Solution Approach 2:
Different parts of the switch mechanism have different functions depending on the mode. The indicator provides local visual feedback about the power state, while the switch mechanism provides tactile feedback through distinct on/off positions when in override mode.
3Reliability
If a physical light switch is used in a remote controlled system, then safety is improved through manual control, but device complexity increases due to integration requirements
Solution Approach 1:
The light switch device is designed with multi-functionality, serving both as a remote control interface and as a manual override mechanism. The same physical switch and indicator components serve multiple purposes: remote control operation, manual override, and visual feedback about power state.
Solution Approach 2:
The patent merges the remote control functionality with the traditional physical switch into a single integrated device. The wireless receiver, processor, switch mechanism, and indicator are combined in one unit, eliminating the need for separate remote control units and reducing overall system complexity.
Data Source
AI summary
A light switch comprises a user input mechanism, a wireless receiver for receiving remote control signals and a processor coupled to the user input mechanism and to the wireless receiver and configured to control a light source to turn it on and off both in response to activation of the user input mechanism and in response to the remote control signals. The light switch is configured, in response to a user override input via the user input mechanism, to enter an override state, whereby the light source is maintained in an off state and remote control signals are prevented from causing the light source to be switched on, until the override state is disengaged. An additional light switch may also be provided that communicates with the aforementioned light switch to provide multi-way switching.