Electric toothbrush refers to a toothbrush that uses electric current through a motor assembly to vibrate the brush head. So that the toothpaste can be quickly decomposed in the oral cavity, thereby keeping the oral cavity clean and tidy.

First you can see that there is a brush head on the upper part, which takes on the burden of brushing the teeth. Once it receives the brushing command, it will start vibrate.

Let's look at the picture on the left as follows.                   

In the second part, we look at its body, you will find that when the mechanism on the handle vibrates, the brush head will also vibrate. There is a cam device under the pen tip, which looks like the picture on the right as above.

The cam unit is connected to the gear built in the top of the motor. There is an electric-driven vibration motor inside the toothbrush, which can make the brush head produce high-frequency swings perpendicular to the direction of the brush handle, but the swing amplitude is very small, generally 5 mm up and down. Around, the industry swing is 6 mm. Under the motor, there is a plastic battery box. Connected to the plastic shell is a simple circuit board, the shell is made of hard plastic, the switch is embedded in a thin, very elastic rubber. The purpose of the enclosure is to prevent water and toothpaste from contacting the motor and battery, and to keep them from getting rusty when wet.