Abstract: The invention provides an improved vibrating device or electromassager including a vibrating plate rocking corresponding to rotation of a crank shaft interlocking with a motor, and a counter weight for compensating for reaction against rocking of the vibrating plate. In the vibrating device thus constructed, the center of gravity of the vibrating plate and that of the counter weight are disposed on the same plane perpendicular to the crank shaft. Accordingly no foce is applied to shake the vibrating plate in the direction of the crank shaft. The vibrating plate is thus rocked stably and noiselessly without making the body of the vibrating device bounce.

Abstract: In a massage machine, a pair of rotatable shafts are mounted to extend through a top plate of a housing, and a pair of kneading balls are loosely fitted respectively to the top ends of the shafts. The shafts include oblique portions such that the kneading balls are rotated eccentrically to provide an oscillating motion. Cover pieces having spherical surfaces corresponding to the oscillating traces of the kneading balls are mounted about the rotatable shafts and interposed in a gap formed in the top plate of the housing. The kneading balls can be oscillated so that portions thereof circulate along the outer surfaces of the cover pieces. A vibration plate can be supported above the top plate by an elastic support leg, such that the massage machine can provide a kneading effect and a vibration effect simultaneously.

Abstract: A high potential generating toothbrush including an elongated, manually gripped block handle formed with a positive electrode; a block head formed with a negative electrode and having a brush implanted in one end thereof; and a high voltage generating circuit connected to those positive and negative electrodes for providing a high voltage to both those electrodes and incorporated in either the grip portion or the brush portion. With such construction, it is possible to treat diseases in the oral cavity, and the toothbrush becomes smaller in size and handy.