Arbitrary Motion Toothbrush with Real-Time Trajectory Control
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Solution Overview
Problem
Existing electric toothbrushes require users to perform 'gross' and 'fine' motions, which can lead to user fatigue and do not allow for real-time adjustments in motion trajectory based on user preference, as they typically provide fixed 'very-fine' oscillating or vibrating motions that may not effectively remove all debris.
Innovation Solution
An electric toothbrush design with a mechanism that allows for arbitrary, relative motions of the toothbrush post with respect to the handle, enabling users to select and modify motion trajectories in real-time using a selection switch, eliminating the need for users to perform high-frequency motions and allowing for customized brushing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If users perform 'gross' and 'fine' motions manually, then brushing coverage is achieved, but user fatigue occurs and debris removal is insufficient
Solution Approach 1:
The patent replaces the manual mechanical brushing system with an automated electromechanical system. An electric motor mounted on the handle generates high-frequency oscillating motions (10-20 Hz) of the bristle head, substituting the user's manual 'fine' motions. The motor-driven mechanism performs the cleaning action automatically, eliminating user fatigue while maintaining effective debris removal through sustained high-frequency vibrations.
Solution Approach 2:
The patent introduces dynamic motion capabilities to the toothbrush head through an electric motor that generates high-frequency oscillations. The bristle head transitions from a static position to dynamic oscillating motion at 10-20 Hz, creating 'very-fine' movements that augment the user's manual brushing motions. This dynamic addition enhances debris removal effectiveness without requiring increased user effort.
2Adaptability or versatility
If fixed trajectory oscillating motions are used, then device simplicity is maintained, but adaptability to different mouth regions and user preferences is limited
Solution Approach 1:
The patent makes the toothbrush head motion trajectory dynamically adjustable through a mode selection mechanism. Users can switch between different oscillation patterns (e.g., circular, linear, elliptical) and frequencies using a mode selection switch. This dynamic adaptability allows customization for different mouth regions and user preferences while maintaining a relatively simple mechanical implementation through basic switch-controlled motor modulation.
Data Source
AI summary
A method and apparatus permitting arbitrary, relative motions of a distal end of a toothbrush or flosser with respect to a handle with real-time selectable motions. The toothbrush has a handle and a post, with a mechanism mechanically coupling the handle to the post permitting relative translational movement of the post with respect to the handle.