How does an “electric toothbr ush” work? Samia Rashed Rebeca Ramirez Engineering 10 3 February 2014
It has been scientifically proven that electric toothbrushes actually clean your filthy mouth better than a manual toothbrush.
This small battery is what powers the electric toothbrush which in return moves the bristles and powers the screen.
The heart (aka motor)
This is the gear that that is powered by the motor which will, in turn, move the bristles.
This is a rod connected to the gear. As the gear continuously turns it makes the rod move in a back and forth motion moving the bristles.
Well, then what moves the bristles you say? A series of rods and “connectors” carries the rod’s back and forth motion up to the bristles causing them to oscillate at high speeds.
This is the printed circuit board (PCB). It is powered by the battery and can run up to several components at a time.
One element of the PCB is an integrated circuit or processor. It monitors other functions going on in the toothbrush.
This is a screen that displays battery percentage all thanks to the processor. The processor also completes a circuit when the “on� button is pressed then sends instructions to start the motor.
But how is the batter charged, Samia? There are two metal coils, one in the toothbrush and the other in the charger. A magnetic field is created when electricity moves through the first coil. When placed on the charger, the magnetic field creates a current in the second coil. Viola! Magic right before your eyes!
https://www.youtube.com/watch?v=pmbdKZMyHXw
Work Cited How Stuff Works, Inc. "HowStuffWorks "Electric Toothbrush Pictures"" HowStuffWorks. How Stuff Works, Inc., n.d. Web. 03 Feb. 2014. http://electronics.howstuffworks.com/gadgets/home/electric-toothbrushpictures.htm