Vibration device, e.g. for mobile telephones has counterweight with low density bearer body attached to motor shaft and actual weight of very high density material in outer region of bearer body

摘要

The vibration device consists of an electric motor and a counterweight mounted on the shaft of the motor. The counterweight consists of a bearer body (5) of a lower density material attached to the shaft and of the actual weight (6), which is made of a material of very high density in the outer region of the carrier body.