Hinged Electrical Box Cover with Cam-Actuated Power Shutoff
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Solution Overview
Problem
Existing electrical boxes lack a mechanism to safely manage power access, requiring users to manually disconnect and reconnect plugs while working in confined spaces without assurance of power status, posing safety risks.
Innovation Solution
An electrical box with a hingable cover and cam-operated micro switch that automatically shuts off power when the cover is open and restores power when closed, ensuring safe access and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is continually supplied to the receptacle within the box, then the receptacle is always ready for use, but user safety is compromised when the cover is open
Solution Approach 1:
The cam-operated micro switch is pre-configured to detect the cover position and automatically control power delivery. When the cover is closed, the cam engages the switch to enable power; when opened, the switch automatically disconnects power before the user can access live components, preventing electrical shock while maintaining readiness when properly closed
Solution Approach 2:
The cam-operated micro switch acts as an intermediary between the cover position and power supply. This intermediary component translates the mechanical state of the cover into electrical control, automatically mediating power flow based on safety conditions without requiring user intervention
2Ease of operation
If the cover is opened to access the receptacle, then user access is enabled, but power remains active creating safety hazards
Solution Approach 1:
The system applies preliminary anti-action by automatically removing power (the harmful factor) in advance when the cover is opened. This prevents the harmful effect of electrical shock before it can occur, while still allowing the beneficial action of accessing the receptacle to proceed safely
3Object-affected harmful factors
If a safety mechanism is added to control power based on cover position, then user safety is improved, but device complexity increases
Solution Approach 1:
The cam-operated micro switch system is self-service in that it automatically monitors cover position and controls power delivery without requiring external control systems, microprocessors, or additional sensors. The mechanical cam directly actuates the switch based on cover position, providing intelligent safety control through simple mechanical-electrical coupling that adds minimal complexity
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
Provides safe and easy access to electrical connections by automatically controlling power, enhancing user safety and reducing the risk of injury or damage during maintenance or usage.
Implementation Method 1
The present invention is directed to a 'while-in-use' electrical device cover that shuts the power off to the device when the cover is open using a cam device
Data Source
AI summary
The present invention is directed to a “while-in-use” electrical device cover that shuts the power off to the device when the cover is open. The power is re-activated when the cover is closed using a cam device.