Hand-held Power Tool Gearshift via Smartphone Interface
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Solution Overview
Problem
Hand-held power tools with switchable gearboxes are difficult for inexperienced users to operate effectively, as they require complex manual gear switching procedures.
Innovation Solution
Integration of a user guide unit, such as a smartphone or tablet, with a communications interface that allows for application-specific gear switching through a simple and secure process, using a servomotor and illumination means to facilitate easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual gear switching procedures are used, then the gearbox can be switched between different gear ratios, but the operation becomes difficult for inexperienced users
Solution Approach 1:
A user guide unit (smartphone or tablet) serves as an intermediary between the user and the power tool's gear switching system. The user guide unit provides visual instructions and guidance through its display, walking users through the gear switching process step-by-step, thereby simplifying operation for inexperienced users without adding mechanical complexity to the tool itself
Solution Approach 2:
The patent replaces complex manual mechanical gear switching operations with an electronically guided process. The user guide unit uses electronic displays and instructions to substitute for complex mechanical procedures, making the switching process easier to understand and execute while maintaining the mechanical gearbox functionality
2Ease of operation
If a user guide unit with communications interface is integrated, then inexperienced users can operate the tool efficiently, but the device complexity increases
Solution Approach 1:
The user guide unit leverages the existing multi-functional capabilities of smartphones and tablets, which already serve as computers, cameras, communication devices, and information displays. By utilizing this universal device for gear switching guidance, the patent avoids adding dedicated complex guidance hardware to the power tool, thereby limiting the increase in device complexity
Solution Approach 2:
The communications interface acts as an intermediary that enables data exchange between the power tool and the user guide unit without requiring complex direct integration. This allows the user guide unit to receive tool status information and provide appropriate guidance while maintaining system modularity and limiting complexity
3Reliability
If illumination means are activated to visualize operating elements, then users can safely identify operating elements, but energy consumption increases
Solution Approach 1:
The illumination means is activated periodically or on-demand based on user interaction with the user guide unit, rather than continuously. The communications interface can trigger illumination activation at specific moments when users need to identify operating elements, thereby providing reliable identification while minimizing energy consumption through periodic rather than continuous operation
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
Enables efficient operation of hand-held power tools by inexperienced users through simplified gear switching, ensuring safe and reliable gear changes without complex manual procedures.
Implementation Method 1
an actuating unit having a servomotor. The servomotor, when activated, is configured to activate the activatable shifting ring in order to switch gears
Implementation Method 2
The at least one operating element is preferably provided with an illumination means, and the control signal is configured to activate the illumination means in order for the command for initiating a switching procedure to be visualized
Data Source
AI summary
In a hand-held power tool with a drive unit comprising at least one drive motor and a transmission coupled to the drive motor for driving a working tool, wherein the transmission can be shifted between at least two different gear ratios, a communication interface is provided for communication with a guide unit operable by a user and designed to receive gearshift instructions from the guide unit for shifting the transmission between the two different gear ratios according to the specific use.