Capacitive Touch Speed Control Interface for Power Tools
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Solution Overview
Problem
Existing power tools lack intuitive and durable speed control interfaces that can efficiently manage a wide range of speed settings and provide precise control to users, often relying on mechanical components that are prone to wear and tear.
Innovation Solution
The implementation of a capacitive touch surface and inductive sensors for speed control, combined with a controller and indicators like LEDs or E-ink displays, allows for precise speed adjustments and error code display, enhancing user interaction and tool performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical components are used for speed control, then the interface is simple to manufacture, but the components are prone to wear and tear reducing reliability
Solution Approach 1:
The patent replaces mechanical speed control components with capacitive touch sensors and electronic controls. The capacitive touch surface detects user input through electrical field changes rather than mechanical contact, eliminating wear-prone mechanical parts while providing durable, precise speed control across multiple settings.
Solution Approach 2:
The patent introduces a controller as an intermediary between the capacitive touch interface and the motor. The controller processes touch input signals and regulates motor speed accordingly, enabling precise speed control without direct mechanical interaction between user input and motor components.
2Adaptability or versatility
If multiple speed settings are implemented, then the adaptability increases, but the interface complexity increases
Solution Approach 1:
The patent segments the speed control interface into distinct capacitive touch zones corresponding to different speed settings. Each touch zone represents a specific speed level, allowing users to select from multiple speed settings through simple spatial differentiation rather than complex controls.
Solution Approach 2:
The capacitive touch surface serves multiple functions: it detects speed selection input, provides visual feedback through integration with display elements, and can indicate operational status. This multi-functionality reduces the need for separate components for each function, maintaining simplicity while enabling versatile speed control.
3Measurement precision
If capacitive touch surface is used, then the durability and precision improve, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the capacitive touch sensor array with the display surface into a single integrated component. This combination eliminates the need for separate sensor and display assemblies, reducing manufacturing steps while maintaining the precision and durability benefits of capacitive touch technology for speed control.
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 provides a reliable, durable, and precise speed control system that detects multi-touch gestures and offers easy maintenance, enabling efficient operation across various speed settings while protecting users from hazardous accessories.
Implementation Method 1
The first interface portion includes a capacitive touch surface configured to generate a speed setting signal in response to detecting a touch of the user
Implementation Method 2
The plurality of indicators includes one or more light emitting diodes
Data Source
AI summary
A power tool including a housing, a battery pack interface, a user input, a speed control interface, and a controller. The battery pack interface is configured to receive a removable and rechargeable battery pack. The user input is configured to control driving of a motor when actuated by a user. The speed control interface includes a first interface portion and a second interface portion. The first interface portion includes a capacitive touch surface configured to generate a speed setting signal in response to detecting a touch of the user. The second interface portion includes a display that includes a plurality of indicators configured to indicate a speed setting of the power tool. The controller includes a memory and an electronic processor. The controller is configured to receive the speed setting signal, and control, in response to the actuation of the user input, the motor to the speed setting.