Handheld Tool Light Emission Circuit for Direct Workpiece Illumination
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Solution Overview
Problem
Rotary tools often operate in environments with less than ideal lighting conditions, making it difficult for users to visually observe their work effectively.
Innovation Solution
The integration of an ergonomic tool-mounted task lighting system within rotary tools, utilizing a light-emission circuit with multiple nodes, LEDs, and a transistor array to provide direct and controllable lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional overhead lighting is used, then general illumination is provided, but direct lighting on the workpiece is difficult to achieve in various working locations
Solution Approach 1:
The patent combines the lighting function with the rotary tool itself by integrating a light source (LED or other illumination device) directly into the tool body. This merging allows the tool to provide its own task lighting, eliminating the need for separate overhead lighting and enabling direct illumination of the workpiece regardless of the working location.
Solution Approach 2:
The patent introduces a light source as an intermediary element between the power source and the workpiece. This light source acts as a mediator that converts electrical energy into optical energy, providing direct illumination to the work area and enabling visual observation of the work in various lighting conditions.
2Illumination intensity
If a light source is added to the rotary tool, then direct task lighting is provided, but the device complexity increases
Solution Approach 1:
The patent implements a circuit configuration where the lighting system is self-regulating. The circuit uses the motor's operating voltage to automatically control the light source, with the light turning on when the motor is running and off when the motor stops. This self-service approach eliminates the need for separate switches or complex control mechanisms, reducing overall device complexity while still providing task lighting.
3Adaptability or versatility
If multiple circuit nodes and components are used for light control, then controllable lighting features are achieved, but the device complexity increases
Solution Approach 1:
The patent designs the circuit to serve multiple functions through a unified configuration. The same circuit nodes and components that control the motor operation also control the lighting, allowing the system to provide both motor-driven functionality and task lighting without requiring separate control systems. This multi-functionality approach reduces the number of additional components needed while still achieving controllable lighting features.
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
This solution enables users to maintain optimal visual conditions for their work, enhancing precision and efficiency by providing direct and adjustable lighting in various working environments.
Implementation Method 1
a light-emitting diode (LED) disposed upon the rotary tool, the LED illuminating when the electric motor is engaged
Implementation Method 2
The second node is separated from the first node by a capacitor
Implementation Method 3
a diode restricting current flow between the first node and the third node
Data Source
AI summary
A rotary tool having a light-emitting element and a control circuit for the light-emitting element. The light-emitting element may comprise one or more light emitting diodes at least partially disposed within a nosecap of the rotary tool. Control of the illumination of the light-emitting element may be accomplished according to a method of operating the control circuit.