Electric Toothbrush Electronic Limit Control for Manual Brushing
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Solution Overview
Problem
Conventional electric toothbrushes without mechanical limit devices struggle to maintain normal operation when the motor is not powered, as the brush head can rotate uncontrollably, making it difficult for users to perform manual brushing effectively.
Innovation Solution
An electronic limit control method and device that applies a holding force to the rotating shaft of the electric toothbrush when the motor is not powered, allowing the brush head to be kept at a target position, ensuring normal use and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an electronic limit mechanism is used instead of a mechanical limit device to flexibly adjust the vibration angle, then the adaptability is improved, but the reliability deteriorates because the brush head cannot be held at a fixed position when the motor is not powered
Solution Approach 1:
The patent combines the electronic limit mechanism with an electronic holding mechanism. The motor control module not only controls the motor to rotate within a predetermined range but also continuously outputs a holding force to maintain the brush head at a target position. This merging of functions allows the system to achieve both flexible angle adjustment and reliable position holding without adding mechanical limit devices.
Solution Approach 2:
The motor control module is designed to perform multiple functions: it controls the motor's rotation within a predetermined range during operation, and simultaneously provides a holding force to maintain the brush head at a target position when the motor is not powered. This multi-functionality allows a single component to address both the adaptability requirement (angle adjustment) and the reliability requirement (position holding).
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 electronic limit control method effectively prevents the brush head from rotating randomly, allowing for normal use and improved reliability of the electric toothbrush, even when the motor is not powered.
Implementation Method 1
controlling the motor of the electric toothbrush to continuously output a target holding force to enable the brush head of the electric toothbrush being kept at a target position
Data Source
AI summary
An electronic limit control method of an electric toothbrush and the electric toothbrush are provided. The electric toothbrush includes a brush head a motor connected to the brush head. A rotating shaft of the motor is configured to drive the brush head to rotate within a predetermined range. The motor of the electric toothbrush is controlled to continuously output a target holding force when the electric toothbrush is in a first state. When an external force applied to the brush head is unable to overcome the target holding force of the motor on the brush head, the brush head is kept in the target position, so that the electric toothbrush is allowed to be used normally in various situations.