Vibrator

A vibrator is a mechanical device that is designed to generate vibrations. The vibration is often generated by an electric motor with an unbalanced weight (mass) on its driveshaft. If the motor is switched on, the rotating weight will resonate.

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There are many different types of vibrator, including those in cellphones and pagers. There are also vibrating devices intended to touch the body (including insertion in a body cavity), thereby stimulating the nerves and giving a pleasurable and possibly erotic feeling.

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Vibration: Vibration refers to mechanical oscillations about an equilibrium point. The oscillations may be periodic such as the motion of a pendulum or random such as the movement of a tire on a gravel road....

Electric motor: An electric motor converts electrical energy into mechanical motion. The reverse task, that of converting mechanical motion into electrical energy, is accomplished by a generator or dynamo. In many cases the two devices differ only in their application and minor construction details. Traction mot...

Unbalanced: Unbalanced is the opposite of balanced....