V-Shaped Bidirectional Toothbrush Head for Dead-Angle Cleaning
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Solution Overview
Problem
Most electric toothbrushes have a single bristle part, resulting in low cleaning efficiency and the inability to effectively clean dead angles, leading to poor cleaning performance.
Innovation Solution
A different-axis bidirectional brush head structure featuring a transmission shaft that rotates or reciprocates with its axis, driving first and second bristle components in opposite directions, forming a V-shaped structure to clean inner, occlusal, and outer surfaces simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single bristle part is used in the brush head, then the device complexity is reduced, but the cleaning efficiency and coverage are insufficient
Solution Approach 1:
The brush head is divided into multiple independent bristle components (first bristle component and second bristle component) that can rotate in opposite directions. Each bristle component has its own drive mechanism through gear components, allowing them to function independently to clean different tooth surfaces simultaneously, thereby improving cleaning efficiency without excessive complexity
Solution Approach 2:
Multiple bristle components are merged into a single brush head assembly that shares common structural elements such as the brush head body, transmission shaft, and drive mechanism. The first and second bristle components are integrated through meshing gear components that transmit motion from a single motor, combining multiple cleaning functions into one unified device
2Productivity
If a single bristle part rotates in one direction only, then the mechanism is simplified, but the cleaning coverage of dead angles is insufficient
Solution Approach 1:
Instead of having a single bristle component rotate in one direction, the invention uses two bristle components that rotate in opposite directions. The first bristle component rotates clockwise while the second bristle component rotates counterclockwise, allowing them to clean both the outer and inner surfaces of teeth, effectively eliminating dead angles in the cleaning coverage
Solution Approach 2:
Gear components serve as intermediaries to transmit rotational motion from the transmission shaft to the bristle components and to enable opposite rotation directions. The meshing gear components convert the single-direction rotation of the transmission shaft into bidirectional rotation of the bristle components through mechanical advantage and gear ratio design
3Productivity
If the bristle components are positioned close to each other, then the device size is reduced, but the cleaning effectiveness on multiple tooth surfaces simultaneously is compromised
Solution Approach 1:
The bristle components are arranged in a spatial configuration that extends in multiple dimensions rather than simply increasing distance in one direction. The first and second bristle components are positioned at different angular positions around the transmission shaft, creating a three-dimensional cleaning coverage that allows simultaneous contact with multiple tooth surfaces while maintaining a compact overall brush head size
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
Enhances cleaning efficiency and effectiveness by allowing the brush head to clean multiple surfaces of a tooth at once, improving the cleaning of tooth gaps and providing both high cleaning performance and user comfort.
Implementation Method 1
the transmission shaft is in transmission connection with the first bristle component for driving the first bristle component to rotate clockwise or counterclockwise; the first bristle component is in transmission connection with the second bristle component
Data Source
AI summary
The present disclosure provides a different-axis bidirectional brush head structure and an electric toothbrush, wherein head structure includes a brush head body, a transmission shaft, a first bristle component and a second bristle component, wherein the transmission shaft is located in the brush head body and rotates in the same direction or reciprocates in different directions with its own axis as the axis; the transmission shaft is in transmission connection with the first bristle component for driving the first bristle component to rotate clockwise or counterclockwise; the first bristle component is in transmission connection with the second bristle component, rotation directions of the first bristle component and the second bristle component are opposite, a distance between the first bristle component and the second bristle component gradually increases along the direction away from the transmission shaft, and the first bristle component and the second bristle component are in a V-shaped structure.