Patent ID: 6813794
Filing Date: 2004-11-09
Classification: A61C

Abstract:
A vibratory electric toothbrush comprising:a toothbrush head having plurality of bristles; a handle portion having a case accommodating an electric switch, a battery power source, an electric motor, and a drive head mounted eccentrically to the motor shaft; a sleeve intermediate the toothbrush head and the handle portion having a smaller cross dimension at the forward end thereof adjoining the toothbrush head than that of the other end thereof extending to the handle portion and having a pair of diametric bores in the forward end thereof to support a pivotal means; a swing arm disposed in said sleeve having a head portion at one end thereof extending to the toothbrush head and pivotally attached in said forward end of said sleeve and having a tail portion at the other end thereof provided with a transverse groove with an elongated opening to receive the drive head which can slide freely in said transverse groove in the lengthwise direction of the elongated opening but is restricted to move relative to said transverse groove in the other direction, perpendicular to the first said direction; and a flexible collar member covering over the joint gap between the toothbrush head and said forward end of said sleeve; whereby the toothbrush head swings laterally around the pivotal means as the drive head circulates in the transverse groove of said swing arm.