Electric Toothbrush Drive Frame for Low-Vibration Brushing
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Solution Overview
Problem
Existing electric toothbrushes have large and complex drive mechanisms, leading to high energy consumption, strong vibration, loud noise, and significant vibration attenuation from the handle to the toothbrush head.
Innovation Solution
An electric toothbrush design with a support frame and drive frame connected by elastic parts, allowing the drive frame to swing or vibrate relative to the support frame, reducing vibration transmission to the handle through a motor-driven swing or vibration mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a built-in eccentric vibration motor is used, then the toothbrush can produce high-frequency vibration to clean teeth effectively, but the drive mechanism becomes large in size, complex in structure, and high in cost
Solution Approach 1:
The toothbrush is divided into functionally independent modules: the motor unit housed in the handle and the brush head as a separate replaceable component. This segmentation allows the complex motor mechanism to be isolated in the handle while keeping the brush head simple and interchangeable, resolving the contradiction between effective vibration generation and overall device complexity
Solution Approach 2:
A vibration transmission rod acts as an intermediary element between the motor and the brush head. This rod efficiently transmits high-frequency vibrations from the motor to the brush head while allowing the motor and brush head to remain structurally separate, maintaining brushing efficiency without requiring a integrated complex drive mechanism
2Productivity
If a built-in eccentric vibration motor is used, then the toothbrush can produce strong vibration for effective cleaning, but the vibration transmission to the handle becomes excessive causing strong vibration sense and loud noise
Solution Approach 1:
The vibration source (motor) is extracted and isolated from the handle structure. The motor is housed in a separate motor case that is connected to the handle body through vibration-isolating elements, effectively separating the useful vibration generation from the harmful vibration transmission to the user's hand
Solution Approach 2:
Vibration-isolating elements such as elastic blocks are pre-installed between the motor case and the handle body to cushion and absorb vibrations before they can transmit to the handle. This beforehand cushioning reduces the vibration sense and noise while preserving the cleaning effectiveness at the brush head
3Power
If a built-in eccentric vibration motor is used, then the toothbrush can generate sufficient vibration power, but the vibration output to the toothbrush head experiences large attenuation consuming a lot of energy
Solution Approach 1:
The vibration transmission rod serves as an efficient intermediary that minimizes energy loss during vibration transfer. This dedicated transmission element provides a direct mechanical coupling path from the motor to the brush head, reducing vibration attenuation and energy consumption compared to indirect transmission paths
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
Reduces energy consumption, improves brushing efficiency, enhances user comfort by minimizing handle vibration, and extends the toothbrush's service life by absorbing impacts and noise.
Implementation Method 1
the motor is able to drive the drive frame to swing or vibrate relative to the support frame when running, so that the drive shaft connector can drive the toothbrush head to swing or vibrate
Implementation Method 2
the drive frame and the support frame are connected by a connecting part and elastic parts
Implementation Method 3
a shock absorber is provided in a gap between the drive frame and the support frame, the shock absorber is elastic, and when the drive frame swings or vibrates, the shock absorber can buffer an impact of the drive frame on the support frame
Data Source
AI summary
The present disclosure provides an electric toothbrush, comprising: a support frame, wherein the support frame is provided with a hollow part; a drive frame, wherein the drive frame is elastically connected to the support frame, the drive frame is located in the hollow part, the drive frame and the support frame are spaced apart, and the drive frame is provided with a drive shaft connector for connecting a toothbrush head; and a motor, wherein the motor is provided on the drive frame, the motor is able to drive the drive frame to swing or vibrate relative to the support frame when running, so that the drive shaft connector can drive the toothbrush head to swing or vibrate.