Detachable Electric Toothbrush Head With Electric-Field Plaque Removal
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Solution Overview
Problem
Conventional toothbrushes are ineffective in removing dental plaque, particularly in hard-to-reach areas, leading to tooth decay and periodontal disease due to the difficulty in visualizing and accessing the plaque.
Innovation Solution
An electric toothbrush design featuring a detachable head unit with a handle unit that supplies a driving voltage, utilizing electrodes to generate an electric field for plaque removal, and allowing for easy replacement of the head unit when bristles deteriorate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional toothbrush is used, then the structure is simple and easy to manufacture, but it is ineffective in removing dental plaque from hard-to-reach areas
Solution Approach 1:
The toothbrush is divided into a handle unit and a replaceable head unit. The head unit contains electrodes that generate an electric field for enhanced plaque removal. This segmentation allows the complex functional components (electrodes, circuit board) to be isolated in the head unit while keeping the handle unit simpler, resolving the contradiction between effectiveness and overall device complexity.
Solution Approach 2:
The patent replaces purely mechanical brushing action with an electric field generation system. electrodes in the head unit generate an electric field that enhances plaque removal effectiveness beyond mechanical brushing alone, addressing the limitation of conventional toothbrushes while introducing controlled complexity through electrical components.
2Reliability
If electrodes and circuit boards are added to enhance plaque removal, then plaque removal efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
By separating the electrode assembly and auxiliary circuit board into the removable head unit, the patent isolates the complex manufacturing components to a modular section. This allows the handle unit to be manufactured using simpler processes, while the head unit can be manufactured separately and attached, thereby improving overall ease of manufacture despite the presence of complex components.
Solution Approach 2:
The head unit serves multiple functions: it contains the bristles for mechanical cleaning, electrodes for electric field generation, and a circuit board for control. This multi-functionality consolidates complex components into a single replaceable module, simplifying the overall manufacturing process by treating the head unit as an integrated assembly.
3Ease of repair
If the head unit is made detachable for easy replacement, then maintenance ease is improved, but connection reliability may deteriorate
Solution Approach 1:
The connection between handle unit and head unit is designed to be dynamically changeable - easily detachable for replacement yet reliable when connected. The combining portion allows simple attachment and detachment operations while maintaining stable electrical and mechanical connections during use, resolving the contradiction between ease of replacement and connection reliability.
4Ease of repair
If bristles are combined with replaceable head unit, then maintenance ease is improved, but device complexity increases
Solution Approach 1:
The patent segments the bristles into a separate replaceable head unit that attaches to the handle unit. This segmentation makes bristle replacement simple - users only need to detach and reattach the head unit without affecting the handle or other components. The modular design adds controlled complexity only where needed (the combining portion) while greatly improving maintenance ease.
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
Effectively removes dental plaque, preventing tooth decay and periodontal disease by enhancing accessibility and plaque removal efficiency, while enabling easy maintenance and replacement of the head unit.
Implementation Method 1
first and second electrodes positioned to correspond to the head portion on the auxiliary circuit board to generate an electric field
Data Source
AI summary
An electric toothbrush includes a head unit and a handle unit. The handle unit is detachably combined with the head unit, and supplies a driving voltage to the head unit in response to a user's manipulation. When the handle unit is partially inserted into the head unit and then rotated with respect to the head unit, the handle unit is electrically connected to and mechanically engaged with the head unit.