Electric Toothbrush Motion Control for Wider Cleaning Coverage
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Solution Overview
Problem
Existing electric toothbrushes with fixed high-frequency vibrations have a poor tooth cleaning effect due to limited cleaning area, leading to inadequate cleaning of teeth.
Innovation Solution
An oral nursing device with a control assembly that generates a periodic cleaning motion comprising alternating first and second motions, where the first angle is greater than the adjacent angle and the second angle is less than the adjacent angle, mimicking hand sweeping to enhance cleaning efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the brush head vibrates at fixed high frequency, then the vibration cleaning function is achieved, but the cleaning area is limited and cleaning effect is poor
Solution Approach 1:
The patent applies dynamics by transforming the fixed high-frequency vibration into a dynamic sweeping motion. The output shaft rotates back and forth to drive the cleaning unit in a sweeping trajectory, making the cleaning area variable and expanding throughout the tooth surface, thereby resolving the contradiction between vibration effectiveness and cleaning area coverage
Solution Approach 2:
The patent introduces a new dimensional element by adding rotational sweeping motion to the traditional linear vibration. The cleaning unit moves not only vertically through vibration but also horizontally through rotation, creating a two-dimensional cleaning pattern that expands the effective cleaning area while maintaining vibration intensity
2Measurement precision
If the output shaft rotates with varying angles in periodic cleaning motions, then the sweeping cleaning effect is improved, but the control complexity increases
Solution Approach 1:
The patent employs periodic action by designing the output shaft to rotate back and forth in regular cycles with alternating first and second angles. This periodic sweeping motion creates a rhythmical cleaning pattern that is both effective and relatively simple to control through timing-based control signals
Solution Approach 2:
The patent applies parameter changes by varying the rotation angles (first angle and second angle) of the output shaft during different phases of the cleaning cycle. By dynamically adjusting these angular parameters, the system achieves optimized sweeping coverage without requiring complex mechanical structures
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 device achieves thorough and deep cleaning of teeth by combining sweeping and vibration motions, improving the overall tooth cleaning effect.
Implementation Method 1
an actuation assembly at least partially accommodated in the grip portion, the actuation assembly including an output shaft engaged with the cleaning portion; and a control assembly generating a driving signal to drive the output shaft of the actuation assembly to output a periodic cleaning motion
Implementation Method 2
a brush head is driven to generate high-frequency vibrations by a motor, so as to enable bristles to vibrate at a high frequency on surfaces of teeth, such that toothpaste is decomposed into fine foam to deeply clean slits between the teeth
Data Source
AI summary
Embodiments of the present application relate to the field of oral nursing technologies, and disclose an oral nursing device, a control method, an electronic device, and a storage medium. In the embodiments of the present application, a control assembly can drive an output shaft of an actuation assembly to output plural cleaning motions by outputting a driving signal, so as to drive a cleaning unit to perform a corresponding motion. Therefore, when the output shaft outputs the plurality of cleaning motions, the cleaning unit generates vibrations to clean teeth. Meanwhile, since first angles of some cleaning motions are larger than first angles of adjacent cleaning motions and second angles are smaller than second angles of the adjacent cleaning motions, center positions of swing angles of these cleaning motions differ from center positions of swing angles of the adjacent cleaning motions.