Electric Toothbrush Head Direct Vibration With Rotation Angle Control
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Solution Overview
Problem
Existing electric toothbrushes hinder the direct transmission of vibration from the driving shaft to the brush head, leading to attenuated vibration frequency of the bristles due to connectors obstructing the vibration path.
Innovation Solution
An electric toothbrush head design featuring a groove for direct connection of the driving shaft, a rotation angle reducing assembly, and a rotation limiting assembly to ensure efficient vibration transmission and controlled bristle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a connector is used to connect the brush head to the driving shaft, then the brush head can be detachably connected to the driving shaft, but the vibration transmission from the driving shaft to the brush head is hindered and attenuated
Solution Approach 1:
The patent removes the connector component from the vibration transmission path. Instead of using a connector to join the brush head to the driving shaft, the brush head is directly connected to the driving shaft, eliminating the intermediate component that caused vibration attenuation while maintaining detachable connection capability
Solution Approach 2:
The patent merges the connection function and vibration transmission function into a single direct interface between the driving shaft and brush head, eliminating the need for separate connector components and ensuring efficient vibration transmission while maintaining ease of replacement
2Productivity
If the driving shaft rotates at high frequency, then the bristles can effectively clean teeth, but the excessive rotation angle may damage the gums
Solution Approach 1:
The patent introduces a rotation angle reducing assembly that dynamically controls the rotation angle of the brush head relative to the driving shaft. This assembly allows the brush head to rotate at a controlled, reduced angle compared to the driving shaft's full rotation, preventing gum damage while maintaining effective cleaning through the high-frequency motion transmitted from the driving shaft
Solution Approach 2:
The patent changes the rotation angle parameter of the brush head by introducing a rotation angle reducing assembly. This assembly modifies the rotational motion parameters, reducing the rotation angle of the brush head from the full rotation of the driving shaft to a controlled angle that prevents gum damage while preserving cleaning effectiveness
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 vibration frequency of the bristles is maintained or enhanced, preventing gum damage by limiting excessive rotation angles and ensuring effective tooth cleaning.
Implementation Method 1
the driving shaft can be inserted into the groove to transmit a vibration to the rod portion
Data Source
AI summary
An electric toothbrush brush head and an electric toothbrush are provided. The electric toothbrush head is configured for connecting a driving shaft of the electric toothbrush, and the electric toothbrush head includes a head portion having bristles, and a rod portion extending from the head portion. The rod portion is provided with a groove for being connected to the driving shaft, so that the driving shaft can be inserted into the groove to transmit a vibration to the rod portion. A rotation angle reducing assembly is arranged between the rod portion and the driving shaft to allow a rotation angle of the rod portion less than that of the driving shaft.