Electric Tool Button Control for Stepped Power and Leakage Prevention

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Solution Overview

Problem

Conventional electric tools require multiple mechanical control buttons for operational variations, leading to space inefficiency and inconvenient user interaction, and lack effective prevention of current leakage in the switched-off state.

Innovation Solution

An electric tool with a control system that uses a limited number of control buttons to selectively supply or cut off power to the circuit module, adjusting output power in steps based on button operations, and includes a display module for power level and on/off state feedback, utilizing a circuit module with a counter and switching elements to manage power distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple mechanical control buttons are used to provide operational variations, then the functional versatility is improved, but the device complexity and space occupation increase

Engineering Contradiction:

Improveoperational variationVSAvoidnumber of control buttons

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

A single control button is designed to perform multiple functions by detecting different operation modes (continuous pressing, intermittent pressing, specific pressing sequences) to achieve various control effects, replacing what would traditionally require multiple separate buttons

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The control button's function dynamically changes based on the operation mode detected by the control system. The same physical button can trigger different control actions depending on how it is pressed (continuously or intermittently), allowing one button to replace multiple static buttons

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple mechanical control buttons are used to provide operational variations, then the functional versatility is improved, but the ease of operation deteriorates due to inconvenient user interaction

Engineering Contradiction:

Improveoperational variationVSAvoiduser interaction convenience

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The control system provides feedback to the user about the current operation mode and control state, enabling the user to understand what function the button will perform based on how it is pressed, making the interaction more intuitive and convenient

Inventive Principle:

Principle #23Feedback

3Reliability

If mechanical switches with self-locking function are used in the control circuit, then the reliability is improved, but the current leakage problem in switched-off state occurs

Engineering Contradiction:

Improvecontrol stabilityVSAvoidcurrent leakage

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces mechanical self-locking switches with an electronic control system that uses a control button coupled to a micro controller. This electronic system eliminates the current leakage problem inherent in mechanical switches while maintaining reliable control through software-based state management

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The control system automatically manages the power state of the motor based on the control button's operation mode detection, eliminating the need for separate self-locking mechanical switches to maintain operational state

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP4098403A1Electric tool and method for operating same

Publication Date: 2022.12.07 TECHTRONIC CORDLESS GP

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AI summary

Disclosed in the present utility model are an electric tool and a method for operating same. The electric tool comprises a power supply input, a motive power system, a control system and at least one control button, the motive power system comprising a motor and an operating component driven by the motor, the control system comprising a circuit module to which the at least one control button is electrically connected, wherein the control system is configured to selectively supply electric power to the circuit module or cut off electric power to the circuit module, and adjust an output power of the motive power system, based on the number of times that the at least one control button is operated. The method for operating the electric tool comprises: operating the at least one control button; the control system judging whether to supply electric power to the circuit module or cut off electric power to the circuit module, or adjust an output power of the motive power system, based on the number of times that the at least one control button is operated; and the control system supplying electric power to the circuit module or cutting off electric power to the circuit module, and adjusting the output power of the motive power system, based on the judgement result.