Toothbrush Acoustic Feedback Mechanism for Brushing Pressure Control
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Solution Overview
Problem
Existing toothbrushes fail to reliably inform users when they exceed the appropriate brushing pressure, leading to potential over-brushing and ineffective dental care.
Innovation Solution
A toothbrush design featuring a sound generation portion that produces a click sound when external force exceeds a threshold, utilizing an elastic deformation portion and a reversal portion made of hard and soft resin, which snap and buckle to generate an audible sound indicating excessive pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a toothbrush uses visual or tactile feedback mechanisms (like warping head portion), then users can recognize appropriate brushing pressure, but the feedback is not reliable enough for consistent pressure control
Solution Approach 1:
The patent replaces mechanical/tactile feedback (warping head portion) with acoustic feedback (click sound generation). The sound generation portion produces a audible click sound when the reversal portion deforms under excessive brushing pressure, providing more reliable and unmistakable pressure feedback to users compared to subtle mechanical deformations.
Solution Approach 2:
The patent uses sound (acoustic signal) as a form of information transmission to alert users. The click sound acts as an audible signal that clearly indicates when brushing pressure exceeds the threshold, improving information transmission reliability compared to silent mechanical feedback.
2Reliability
If the sound generation portion uses complex structures (reversal portion, elastic deformation portion), then the click sound is more reliable, but the device complexity increases
Solution Approach 1:
The patent merges the sound generation function with the structural components (reversal portion and elastic deformation portion) into an integrated system. The reversal portion and elastic deformation portion work together as a unified mechanism where the deformation itself generates the sound, eliminating the need for separate sound generation components.
Solution Approach 2:
The reversal portion and elastic deformation portion utilize the brushing force itself to generate the click sound. The external force that causes the deformation also produces the sound signal, making the system self-actuating and eliminating the need for external power sources or complex control mechanisms.
3Ease of operation
If the toothbrush provides pressure feedback, then users can control brushing pressure, but users may still not recognize the feedback if it is subtle
Solution Approach 1:
The patent substitutes subtle mechanical feedback with prominent acoustic feedback. The click sound is a loud, unmistakable auditory signal that easily captures user attention and clearly indicates excessive pressure, making feedback detection much easier compared to subtle mechanical deformations that require careful tactile perception.
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 toothbrush effectively alerts users to appropriate brushing pressure, enhancing their ability to recognize and control brushing force, thereby improving dental care.
Implementation Method 1
an elastic deformation portion that connects a first region on the tip end side from the sound generation portion and a second region on the rear end side from the sound generation portion, and elastically deforms at least up to the external force at which the sound generation portion generates the click sound
Implementation Method 2
a reversal portion that generates the click sound by being snapped, buckled, and reversed as the head portion is displaced on a back surface side opposite to the bristle tufting surface in the first direction due to the external force exceeding the threshold value
Data Source
AI summary
An object of the present invention is to provide a toothbrush that enables an appropriate brushing pressure to be more reliably recognized. A head portion (10) provided on a tip end side in a long axis direction and having a bristle tufting surface (11), a grip portion (30) disposed on a rear end side from the head portion, and a neck portion (20) disposed between the bristle tufting surface and the grip portion are provided. A sound generation portion (70) that generates a click sound due to deformation when an external force in a first direction orthogonal to the bristle tufting surface exceeds a threshold value is provided on a rear end side from the bristle tufting surface.