Power Tool Sensor Board Indicator for Operating Mode Visibility
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Solution Overview
Problem
Existing power tools lack effective indicators to display operational parameters, such as operating modes, which can lead to user confusion and inefficient tool operation.
Innovation Solution
A power tool design that includes a housing with a motor, a printed circuit board assembly (PCBA) with a sensor to detect rotor rotation, and an indicator assembly with a light source and light pipe to visually indicate operational parameters, such as selected operating modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If no indicator assembly is provided in existing power tools, then the device complexity is reduced, but the loss of information occurs as users cannot see operational parameters
Solution Approach 1:
The indicator assembly is integrated directly onto the PCBA substrate, merging the indicator function with the existing circuit board structure. This eliminates the need for separate indicator components and reduces overall device complexity while providing visual feedback for operational parameters.
Solution Approach 2:
The PCBA serves multiple functions: it provides circuit control and simultaneously hosts the indicator assembly to display operational parameters. By making the PCBA multi-functional, the patent avoids adding separate dedicated indicator structures, thereby reducing complexity while improving information visibility.
2Measurement precision
If a sensor is added to detect rotor rotation, then the measurement precision of operational parameters is improved, but the device complexity increases
Solution Approach 1:
The sensor is integrated directly onto the PCBA, merging the detection function with the control circuitry. This integration approach provides precise rotor rotation detection while avoiding the complexity of separate sensor modules and their associated mounting and wiring infrastructure.
3Adaptability or versatility
If multiple operating modes are added to the power tool, then the adaptability or versatility is improved, but the loss of information occurs as users cannot distinguish between modes
Solution Approach 1:
The indicator assembly uses different light colors or patterns to represent different operating modes. This visual coding system allows users to quickly identify the selected mode among multiple operating modes, preventing information loss while maintaining high adaptability.
Solution Approach 2:
The indicator assembly provides real-time visual feedback about the currently selected operating mode. This feedback mechanism ensures users are always informed about the tool's state, enabling them to make informed decisions when switching between multiple operating modes.
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 provides clear visual feedback to the user about the current operating mode of the power tool, enhancing user experience and operational efficiency by eliminating confusion and ensuring proper tool usage.
Implementation Method 1
the PCBA including a sensor configured to detect rotation of the rotor... wherein the sensor is a Hall-Effect sensor
Implementation Method 2
the indicator assembly includes a light source mounted to the PCBA... the indicator assembly includes a light output configured to emit visible light generated by the light source
Data Source
AI summary
A power tool includes a housing, a motor supported within the housing, the motor including a stator and a rotor, and a PCBA supported within the housing, the PCBA including a sensor configured to detect rotation of the rotor and an indicator assembly. The indicator assembly is configured to indicate an operational parameter of the power tool.