Adaptive Toothbrush System for Force Coaching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power toothbrushes often fail to effectively coach users to reduce brushing force to a safe level, leading to potential gum harm or ineffective cleaning, as users may not respond to warnings of excessive force, resulting in continued harmful brushing habits.
Innovation Solution
An adaptive system within the toothbrush that uses a force sensor to monitor and adjust brushing force, providing visual feedback through color indicators and dynamically adjusting thresholds to encourage users to reduce pressure, while also allowing the toothbrush to adapt its bristle pressure through changes in amplitude or frequency to maintain safe cleaning forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a force sensor is used to indicate excessive force to the user, then the user is informed about correct brushing force, but the user may not change their behavior and continues to apply harmful force
Solution Approach 1:
The system implements continuous feedback by monitoring brushing force with a force sensor and providing real-time visual feedback through color indicators (green, yellow, red) that change based on the detected force level. This continuous feedback loop helps users understand the direct relationship between their brushing pressure and the resulting indicator state, encouraging behavior modification through immediate consequences.
Solution Approach 2:
The patent employs color changes in visual indicators to communicate force levels to users. Different colors represent different force ranges (e.g., green for acceptable force, yellow for approaching excessive force, red for excessive force). This intuitive visual system makes it easier for users to grasp and respond to force feedback compared to numerical or textual displays.
2Object-affected harmful factors
If the toothbrush provides continuous force monitoring and warnings, then gum harm is prevented, but users may terminate use of the toothbrush due to frustration
Solution Approach 1:
The system uses a graduated warning approach rather than immediate harsh punishment. It provides partial action by first showing green indicators for acceptable force, then yellow warnings as force increases, and only red indicators when force becomes excessively harmful. This gradual escalation allows users to self-correct before severe penalties occur, maintaining reliability by reducing frustration while still preventing gum harm.
Solution Approach 2:
The patent converts the potentially harmful effect of excessive brushing force into a beneficial learning opportunity. By providing clear visual feedback about force levels, the system helps users discover their own improper brushing habits and learn correct technique. The harmful excessive force becomes the catalyst for positive behavior change rather than simply being punished.
3Force
If the toothbrush adapts bristle pressure through amplitude or frequency changes, then safe cleaning forces are maintained, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts brushing parameters by changing the amplitude or frequency of brushhead motion based on detected force levels. When excessive force is detected, the system automatically reduces the driving force through motor control, allowing the bristles to apply safer pressure without requiring manual user adjustment. This dynamic adaptation maintains safe cleaning forces while managing complexity through automated control algorithms.
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 system effectively coaches users to maintain safe brushing forces, reducing the risk of gum harm and ensuring effective cleaning by providing continuous feedback and adaptive adjustments, encouraging users to lower their brushing pressure and maintaining effective cleaning results.
Implementation Method 1
a force sensor 28
Data Source
Figure 1
Figure 2
AI summary
The adaptive system includes a power toothbrush (10) which determines bristle force or pressure applied by the user against the teeth. The toothbrush includes a processing system (28) for comparing the determined force with a threshold value of excessive force and a threshold adaptive value which is below the excessive force threshold but serves as a warning for the user. The system is capable of raising the initial adaptive value threshold (64) following the user exceeding the adaptive value for a selected number of brushing events and then further for decreasing the adaptive value (66) back toward the initial adaptive value when the increased adaptive value is not exceeded for a selected number of brushing events, thus providing the ability to encourage/coach the user toward a brushing force which is below the threshold adaptive level and into a safe region of operation.