Patent ID: 7951098

Claim:
An amplitude change-over device for a body vibration machine comprising: a standing table positioned over a base plate, said base plate and said standing table fixed therebetween with a plurality of buffer support cylinders, a user standing on a topside of said standing table; a motor positioned under said standing table and having its outer casing secured with an underside of said standing table, a rotating shaft driven by said motor having its opposite ends respectively fixed thereon with an eccentric unit, said rotating shaft rotated eccentrically to actuate both said outer casing of said motor and standing table to produce continuous vibration when said motor is started; and, characterized by said eccentric units fixed on opposite ends of said rotating shaft driven by said motor, each said eccentric unit composed of an eccentric driving plate secured with said rotating shaft for rotating together and an eccentric driven plate disposed near one side of said driving plate, said driven plate having its eccentric portion movably fitted on said rotating shaft, either one of said driving plate or said driven plate having one surface bored with a slide groove with said rotating shaft acting as a pivot, and another one having a corresponding end of its surface fixed with a projecting stud inserted in said slide groove, said motor being a right-handed and left-handed one changeable in rotating directions; and size of included angle between said driving plate and said driven plate able to be adjusted for changing amplitude of said motor when said motor is chosen to rotate clockwise or counterclockwise, thus amplitude of vibration able to be changed by employing a single motor.