Spherical Toothbrush Head Dual-Axis Rotation
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Solution Overview
Problem
Current mechanized toothbrushes lack the ability to provide variable brushing motions tailored to different areas of the mouth, leading to ineffective cleaning of teeth, gums, and tongue, particularly failing to reach areas between teeth and the gum line effectively.
Innovation Solution
A toothbrush with a spherical head that is rotatable about two perpendicular axes, allowing for independent and synchronized brushing motions, driven by a system of drive shafts, motors, and gears that enable continuous rotation and reciprocation, ensuring bristles are uniformly oriented for efficient cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed brushing motion is used in mechanized toothbrushes, then the device structure is simple, but it cannot effectively clean all areas of the mouth including gum line and interdental spaces
Solution Approach 1:
The brush head is made dynamically movable about two perpendicular axes (first and second axes) instead of being fixed in a single position. This allows the brushing direction to be changed adaptively during use, enabling effective cleaning of different mouth areas including gum line and interdental spaces while maintaining a relatively simple mechanical structure
Solution Approach 2:
The invention adds rotational freedom about a second axis that is perpendicular to the first axis of reciprocation. This dimensional addition transforms the brush head motion from one-dimensional reciprocation to two-dimensional movement, greatly enhancing adaptability for different brushing areas without proportionally increasing complexity
2Adaptability or versatility
If the brush head is made rotatable about two perpendicular axes, then brushing adaptability is improved, but the drive mechanism becomes more complex
Solution Approach 1:
The drive mechanism is segmented into independent components: a first drive shaft for reciprocating motion about the first axis, and a second drive shaft for rotating the brush head about the second axis. This segmentation allows each axis to be controlled independently, providing precise brushing direction control while keeping the overall system manageable through modular design
3Area of stationary object
If bristles are arranged on a spherical head, then coverage area is increased, but bristle orientation control becomes difficult
Solution Approach 1:
The brush head is given a spherical shape with bristles distributed across its surface. This spherical geometry naturally provides omnidirectional coverage and allows the brush to access different mouth areas effectively. The curvature of the sphere ensures that bristles can maintain proper orientation relative to the brushing surface regardless of the head's rotational position about the two axes
Data Source
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AI summary
The present invention provides a toothbrush (710), in particular a mechanical toothbrush (710) more commonly known as an electric toothbrush (710), which includes a spherical brush head (712) which is capable of undergoing at least first (720) and second (722) independent brushing motions in order to improve the overall brushing effectiveness.