Electric Toothbrush Head Direct Vibration Transmission
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Solution Overview
Problem
Existing electric toothbrushes suffer from hindered and attenuated vibration transmission from the driving shaft to the brush head due to the use of connectors, which affects the vibration frequency of the bristles.
Innovation Solution
The electric toothbrush head features a direct connection between the driving shaft and the brush head through a groove and elastic arm mechanism, ensuring that the vibration of the driving shaft is directly transmitted to the brush head without attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a connector is used to connect the driving shaft to the brush head, then the brush head can be detachably connected for replacement, but the vibration of the driving shaft is hindered and attenuated during transmission to the brush head
Solution Approach 1:
The patent removes the connector component from the transmission path between the driving shaft and brush head. By extracting this intermediate element, the vibration transmission path is shortened and direct contact is established, eliminating the attenuation caused by the connector while preserving detachability through the driving shaft insertion structure.
Solution Approach 2:
The patent introduces a transmission rod as an intermediary element that directly connects the driving shaft to the brush head. This mediator eliminates the traditional connector's detrimental effects on vibration transmission while maintaining the detachable connection function, as the rod transmits vibration directly without the hindrance of complex connector structures.
2Reliability
If a connector is used to connect the driving shaft to the brush head, then the brush head can be fixed on the driving shaft, but the vibration frequency of the bristles is affected due to attenuation
Solution Approach 1:
By removing the connector that caused vibration attenuation, the patent directly exposes the driving shaft to the brush head through a simplified transmission rod structure. This extraction eliminates the source of frequency distortion while the limiting portions ensure stable positioning, achieving both connection reliability and vibration frequency precision.
Solution Approach 2:
The patent changes the structural parameters of the connection system by eliminating the connector's intermediate layers and establishing direct contact between the driving shaft and brush head via the transmission rod. This parameter change reduces the transmission path length and eliminates attenuation, thereby improving vibration frequency characteristics while maintaining connection stability through the limiting portion design.
3Loss of energy
If the driving shaft is directly connected to the brush head, then the vibration can be transmitted without attenuation, but a connection mechanism is still needed to fix the brush head on the driving shaft
Solution Approach 1:
The patent segments the connection function into two independent parts: the transmission rod for direct vibration transmission and the limiting portions for positioning and fixation. This segmentation allows the vibration path to remain direct and unattenuated while the connection mechanism is simplified to just the limiting portions, reducing overall device complexity compared to traditional connectors.
Solution Approach 2:
The patent merges the vibration transmission function and connection fixation function into a unified structure where the transmission rod simultaneously serves as both the vibration transmission path and the connection element. The limiting portions are integrated into this merged structure, eliminating the need for separate connectors and reducing device complexity while maintaining effective vibration transmission.
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
This solution allows for higher vibration frequency of the bristles, resulting in more effective tooth cleaning compared to traditional electric toothbrushes.
Implementation Method 1
The elastic arm, the elastic arm forming partial side wall of the groove, and the elastic arm having a second limiting portion configured for matching with the first limiting portion
Data Source
AI summary
An electric toothbrush brush head and an electric toothbrush are provided. The brush head has a rod portion extending thereof, a driving shaft of the electric toothbrush is inserted into a groove formed at the rod portion, and the rod portion and the driving shaft have first and second limiting portions to fix the position. When an electric motor core inside the electric toothbrush is activated to drive the driving shaft to generate high-frequency motion, the bristles on the brush head can brush teeth. As the driving shaft in this scheme is in contact with the rod portion which is a part of the brush head and extending from the head portion, therefore, the vibration of the driving shaft can be directly transmitted to the head portion.