Technical Description of An Electric Tooth Brush [PDF]

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TECHNICAL DESCRIPTION OF AN ELECTRIC TOOTH BRUSH An electric toothbrush is a toothbrush that makes rapid, automatic bristle motions, either backand-forth oscillation or rotation-oscillation (where the brush heads alternates clockwise and counterclockwise rotation), in order to clean teeth. The electric tooth brush is a battery powered teeth scrubbers works by moving its head back and forth up to 7000 times in a minute, shifting twice as much plaque as ordinary, manual brushes. This cleaner keeps out teeth and the gums that support them cleaner and healthier. How an electric tooth brush works; A battery (1) powers an electronic circuit (2) that produces a high-frequency DC current. Through connecting wires (3), this drives a piezoelectric transducer (4) that converts electricity into high-speed vibration. The transducer expands and contracts at very high speed, producing sound waves in your mouth that create gentle cavitation (5) around your teeth, loosening plaque that can be brushed aside (6).

DESCRIPTION OF MAIN PARTS AND SUB-PARTS Main Part 1 and Sub-Part Battery Modern electric toothbrushes run on low voltage, 12v or less. A few units use a stepdown transformer to power the brush, but most use a battery, usually but not always rechargeable and non-replaceable, fitted inside the handle, which is hermetically sealed to prevent water damage. A battery acts as power supply to the tooth brush which will produce high frequency DC current that enables the brush to rotate back and forth to perform its duty.

Battery Compartment The battery compartment holds the batteries, the power source of the electric tooth brush. The compartment vary in size according to the model and the brand of the tooth brush itself. The battery compartment is equipped with a coiled metal spring on the interior of the closed end, and bronze colored metal strip along one side of the compartment. The compartment holds 1.5 V battery, with one end is in contact with the spring and the other end in contact with the bronze colored metal strip.

Main Part 2 and Sub-part Brush The brush of electric tooth brush is the most crucial part in cleaning the teeth. The bristles on a rotating electric toothbrush turn around and around. The circular motion mimics the traditional circular pattern with which most users manually brush their teeth. Any electric toothbrush provides motions that are hundreds of times faster than those made by the average human hand wielding a manual toothbrush. The faster movements make for more effective cleaning in less time. Electric toothbrushes rotate, vibrate, or oscillate at different speeds.

Cam Unit

and Gear

Directly underneath the brush there's a cam and gear unit, which looks like this (photo below). The cam and gear unit is the clever part of an electric toothbrush. It converts the highspeed rotary (spinning) motion of the brush's electric motor into reciprocating (back-and-forth) brushing motion that cleans your teeth more effectively.

Main Part 3 and Sub-part Body The body of the electric tooth brush is usually made of plastic. The body will protect all the electronic component of this item as they are very sensitive which can cause damage to the electric tooth brush. It also acts as a gripper where we can held during the cleaning process.

Switch The switch controls the on and off button. Once the on button is pressed, the electric will flow through the circuit, thus making the brush to rotate. The same goes when off button is pressed. It will enable the electric flow and stop the rotation of the brush.

Conclusion Using an electric toothbrush can greatly improve a consumer's oral hygiene. The toothbrush does most of the work, eliminating the need for constant movement during the cleaning process. Electric tooth brush will also ease our work as it works faster and more efficient that the usual tooth brush.