Hand-held Power Tool Percussion Mode Switching
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Solution Overview
Problem
Existing hand-held power tools lack efficient mechanisms for automatically switching between non-percussive and percussive operating modes, leading to potential user errors and reduced operating comfort, especially in applications like drilling into concrete or wood.
Innovation Solution
A hand-held power tool with a percussion mechanism and a communication interface that allows for remote control via a user guidance unit, such as a smartphone or tablet, to changeover between operating modes automatically or with minimal user intervention, using a touchscreen interface and actuating motor for seamless mode transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual switching ring is used to change over between operating modes, then the device structure remains simple, but the likelihood of user errors increases and operating comfort is reduced
Solution Approach 1:
The patent replaces the manual mechanical switching ring with an automated control system that uses a communication interface to receive changeover instructions from a user guidance unit (such as a smartphone or tablet). This substitution of mechanical control with automated electronic control eliminates user errors in mode switching while maintaining relatively simple device architecture by leveraging existing mobile devices for control functionality.
2Extent of automation
If automatic mode changeover is implemented without user guidance unit, then operating comfort increases, but the device requires complex integration of control systems
Solution Approach 1:
The patent introduces a communication interface as an intermediary component that enables automatic mode changeover by receiving control instructions from an external user guidance unit (smartphone or tablet). This intermediary approach allows automation functionality without requiring complex integrated control systems within the power tool itself, as the control logic resides in the separate mobile device that communicates with the tool via standardized interfaces.
3Reliability
If remote control via user guidance unit is implemented, then user errors are reduced and operating comfort is enhanced, but the device complexity increases due to communication interface requirements
Solution Approach 1:
The patent employs a communication interface that utilizes universal wireless communication standards (such as Bluetooth, Wi-Fi, or other wireless protocols) to enable remote control from various types of user guidance units including smartphones, tablets, and other mobile devices. This universal approach allows the same interface to work with multiple device types and purposes, reducing the need for specialized complex integration while maintaining high reliability and user error reduction benefits.
Data Source
AI summary
A hand-held power tool includes a drive unit configured to drive an insertion tool in at least one non-percussive operating mode. The drive unit includes a percussion mechanism for percussive driving of the insertion tool in an associated percussion mode. The hand-held power tool further include a user guidance unit configured to be actuated by a user and a communication interface configured to communicate with the user guidance unit and to receive, from the user guidance unit, changeover instructions for changing over the drive unit between the at least one non-percussive operating mode and the associated percussion mode in an application-specific manner.