Electric Toothbrush Stepped Shaft Spiral Bevel Gear Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric toothbrushes have low transmission efficiency, high noise, and are unable to effectively clean dirt from crevices between teeth due to limited rotation and cumbersome design.
Innovation Solution
An electric toothbrush with a motor driving a first and second spiral bevel gear to rotate the toothbrush head 360 degrees, utilizing a stepped shaft for improved transmission efficiency and reduced noise through a simplified coupling system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a coupling is used to connect the drive shaft and main shaft of the motor, then the structure is assembled, but the transmission efficiency is low and noise is high
Solution Approach 1:
The coupling component is completely removed from the transmission system. The patent directly connects the drive shaft and main shaft through a simplified structure, eliminating the coupling that caused energy loss and noise while maintaining the necessary mechanical connection.
2Reliability
If a coupling is used to connect the drive shaft and main shaft, then the components are connected, but transmission stability is poor and disordered shake occurs
Solution Approach 1:
The coupling is removed and replaced with a direct connection structure between the drive shaft and main shaft. This eliminates the intermediate component that caused transmission instability and disordered shake, achieving smoother and more reliable operation.
3Ease of operation
If the toothbrush head is limited to rotate only 90 degrees, then the structure is simple, but dirt in crevices between teeth cannot be cleaned
Solution Approach 1:
The toothbrush head rotation is changed from a fixed limited range (90 degrees) to a dynamic 360-degree rotation capability. This allows the brush head to reach and clean all areas including crevices between teeth, significantly improving cleaning effectiveness while maintaining operational simplicity.
4Ease of operation
If the toothbrush head can rotate 360 degrees, then cleaning effectiveness is improved, but the rotation mechanism becomes more complex
Solution Approach 1:
The rotation mechanism is designed to enable dynamic 360-degree movement of the toothbrush head. This dynamic design allows comprehensive cleaning coverage while the patent maintains simplicity by integrating the rotation capability into the existing motor-driven structure without adding complex separate mechanisms.
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 solution provides a steady, high-efficiency, and quiet operation that enhances user experience and extends the product's service life by effectively cleaning between teeth and reducing disordered shakes.
Implementation Method 1
a first spiral bevel gear and a second spiral bevel gear are used to drive the toothbrush head to rotate
Implementation Method 2
The second shaft body in the stepped shaft is connected with the shell through a bearing
Data Source
AI summary
The present disclosure relates to an electric toothbrush, including a shell, a toothbrush head, a first spiral bevel gear, a second spiral bevel gear, and a drive motor. The toothbrush head is connected with the second spiral bevel gear; the first spiral bevel gear and the second spiral bevel gear are in transmission connection; the first spiral bevel gear is arranged above the drive motor and is in transmission connection with the drive motor; a central axis of the first spiral bevel gear is perpendicular to a central axis of the second spiral bevel gear; and the drive motor has a stepped shaft connected to the first spiral bevel gear. The first spiral bevel gear and the second spiral bevel gear are used to drive the toothbrush head to rotate, so that the drive is steady and the transmission efficiency is high. A main shaft of the drive motor adopts the stepped shaft, which can improve the transmission efficiency, so that the transmission is steadier. Since the coupling in the existing art is simplified, noise generated in the transmission process can be reduced, disordered shake in the rotating process of the toothbrush head is reduced, the use experience of a user is enhanced, and the service life is prolonged.