Electric Toothbrush Automatic Rotation Control via Attitude Sensor
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Solution Overview
Problem
Existing electric toothbrushes lack automated and intelligent control over rotation direction, leading to potential gum damage due to improper use and reduced user experience.
Innovation Solution
An automatic control type electric toothbrush with a toothbrush head and handle connected by a driving shaft, equipped with an attitude sensor, control module, and driving mechanism, which calculates pitch and roll angles from XYZ coordinate data to control the motor for clockwise or counterclockwise rotation, ensuring the toothbrush head moves from the tooth root to the dental crown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control is used for rotation direction, then device complexity is reduced, but ease of operation deteriorates and user experience is reduced
Solution Approach 1:
The toothbrush automatically determines rotation direction based on its own attitude sensor data without requiring user input. The control module processes the attitude data and autonomously controls the motor to rotate in the correct direction, making the device serve itself rather than requiring manual control from the user.
Solution Approach 2:
The patent replaces manual mechanical control with an automated system combining attitude sensors, control modules, and motor control. The attitude sensor detects the toothbrush's orientation, the control module processes this data to determine the correct rotation direction, and the motor executes the rotation automatically, substituting the mechanical manual control system with an automated sensing and control system.
2Object-affected harmful factors
If rotation direction is not controlled, then device complexity is reduced, but object-affected harmful factors increase due to gum damage
Solution Approach 1:
The attitude sensor continuously provides feedback about the toothbrush's orientation and position. The control module processes this feedback data to determine the correct rotation direction, creating a closed-loop control system that ensures the toothbrush head rotates in the proper direction (from tooth root to crown) to prevent gum damage while maintaining controlled complexity through automated protection.
Solution Approach 2:
The system proactively prevents gum damage by automatically controlling the rotation direction before harmful brushing patterns can occur. The attitude sensor and control module work together to ensure the toothbrush always rotates in the correct direction, preventing potential gum damage rather than reacting to it after the fact.
3Extent of automation
If automated control is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control module serves multiple functions: it processes attitude data from the sensor, determines rotation direction, controls motor operation, and ensures proper brushing technique. By making the control module multi-functional, the patent reduces the need for separate dedicated components for each function, thereby increasing automation while limiting the growth of overall device complexity.
Data Source
AI summary
Provided is an automatic control type electric toothbrush, comprising a toothbrush head (20) and a toothbrush handle (10) connected by means of a driving shaft (12), wherein the toothbrush handle (10) is provided with a gesture sensor, a control module and a driving mechanism; and the control module can control the driving mechanism to drive the driving shaft (12), and same also drives the toothbrush head (20) to rotate clockwise or anticlockwise according to gesture data acquired from the gesture sensor, so that the toothbrush head (20) rotates in the direction from teeth root to dental crown. The automatic control type electric toothbrush can realize the purpose of automatically brushing teeth along the teeth, and can protect the gingivae, thus achieving automated treatment without manual control by a user, and therefore improving user experience.