Electric Toothbrush Power Shaft for Expanded Brush Coverage
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Solution Overview
Problem
Current electric toothbrushes have limited brush head swing angles, restricting their coverage range and cleaning effectiveness.
Innovation Solution
The electric toothbrush features a motor-driven power shaft that moves in multiple directions, allowing the brush head to swing, rotate, or vibrate relative to the handle, expanding its range of motion and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the brush head is swingably connected to the handle with a limited swing angle (10° to 20°), then the structure is simple and stable, but the coverage range of the brush head is limited and cleaning effectiveness is reduced
Solution Approach 1:
The power shaft is designed to move in multiple directions (radial and axial movements) rather than being fixed in a single swing angle, allowing the brush head to dynamically adjust its position and expand coverage range while maintaining structural integration
Solution Approach 2:
The power shaft's movement is extended from one-dimensional swinging to multi-dimensional motion including radial movement and axial movement, thereby expanding the brush head's coverage range without significantly increasing structural complexity
2Adaptability or versatility
If the brush head is driven by a motor with multi-directional power shaft movement, then the coverage range is expanded, but the device complexity increases
Solution Approach 1:
The motor is designed to provide multiple functions through a single integrated structure, where the power shaft simultaneously performs radial movement, axial movement, and drives the brush head, eliminating the need for separate mechanical components for each motion type
Solution Approach 2:
The patent replaces complex mechanical linkage systems with a motor-driven power shaft that achieves multi-directional movement through electromagnetic control, simplifying the overall mechanical structure while maintaining expanded coverage capability
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 expanded motion range of the brush head enhances the ability to cover tooth surfaces, improving cleaning effectiveness.
Implementation Method 1
A second magnetic portion is disposed around a peripheral side of the first magnetic portion, the second magnetic portion is magnetically connected to the first magnetic portion, the first magnetic portion moves with respect to the motor housing under an action of the second magnetic portion
Data Source
AI summary
An electric toothbrush, including a handle, a motor, and a brush head. The handle defines an accommodating cavity, the motor is driven by electric power, and the motor includes a motor housing and a power shaft, the motor housing is accommodated in the accommodating cavity, the power shaft is movably connected to the motor housing and moves in multi-directions along an axial direction of the motor housing, the power shaft passes through the handle, the brush head is connected to the power shaft and is driven by the power shaft to swing, rotate, and/or vibrate with respect to the handle.