Safety Lighting System for Power Tools with Automatic Disengagement
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Solution Overview
Problem
Outdoor maintenance workers face safety risks due to low visibility when operating power tools in unlit areas, as these tools obscure their presence and create hazardous conditions with exhaust and dust, making it difficult for pedestrians and drivers to see them.
Innovation Solution
A safety lighting system integrated into maintenance equipment, power tools, and a wearable vest that provides 360-degree illumination by drawing power from the equipment or tool, ensuring the operator, tool, and surrounding area are visible, with automatic disengagement of power in case of tool loss to prevent accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If handheld power tools are used in outdoor maintenance, then productivity is improved, but visibility of the operator and tool is reduced
Solution Approach 1:
The patent combines the lighting function with the power tool by integrating a light source, power connection, and control system into a single unified device. The light connects to the power tool's battery or electrical system, merging illumination capabilities with the existing power tool functionality to eliminate the need for separate lighting equipment.
Solution Approach 2:
The lighting system is designed to work with multiple types of power tools (gas-powered, battery-powered, corded electric) through universal power connection methods. The system can function as a light source, safety indicator, and emergency signaling device across different tool applications, providing multi-functional utility.
2Adaptability or versatility
If power tools emit exhaust or stir up dust, then the tools can operate in various conditions, but visibility in the working area is reduced
Solution Approach 1:
The lighting system activates automatically when the power tool is turned on, providing illumination before the operator begins work or before visibility conditions deteriorate. This preliminary lighting action ensures the work area is illuminated in advance, compensating for dust or exhaust that may subsequently reduce visibility.
Solution Approach 2:
The light remains continuously illuminated throughout the operation of the power tool, ensuring constant visibility of the work area regardless of dust generation or exhaust emission. The lighting action continues without interruption as long as the tool is running, maintaining visibility throughout the entire work process.
3Illumination intensity
If lights are added to power tools, then operator visibility is improved, but device complexity increases
Solution Approach 1:
The lighting system merges with the power tool's existing power source and control mechanisms. The light draws power from the tool's battery or electrical system, and the on/off control is integrated with the tool's own controls, reducing the need for separate power sources and control systems that would increase complexity.
Solution Approach 2:
The lighting system is self-powered through connection to the power tool's existing power source, eliminating the need for separate batteries or power supplies. The system automatically activates and deactivates with the tool operation, requiring minimal additional components and simplifying the overall system architecture.
4Use of energy by moving object
If the vest cord is connected to the power tool, then the lights are powered, but the tool can be accidentally dropped
Solution Approach 1:
The system incorporates a tension-sensitive connection that provides feedback about the physical state of the vest-tool interface. When the cord experiences excessive tension or detachment (indicating a drop or separation), the connection automatically breaks the electrical circuit, shutting off power to the light and signaling a potential accident condition.
Solution Approach 2:
The automatic disconnection mechanism serves as a preliminary safety action that prevents further harm in case of accidental dropping. The tension-sensitive breakaway connection is designed to fail safely by disconnecting power before significant damage or injury can occur, providing a built-in protective mechanism.
Data Source
AI summary
The safety lighting system solves the problem of working in low-visibility situations by providing enhanced 360-degree visibility of a worker and his equipment to passing vehicles and pedestrians. The safety lighting system works in combination with a piece of maintenance equipment, a power tool, a battery pack, or a maintenance backpack. The safety lighting system illuminates the operator, the tool, and a surrounding area when the tool or piece of equipment is in use. Such a system allows a passerby to see the operator even in substandard light conditions.