RESONANT DRIVE MECHANISM FOR ELECTRICAL TOOTHBRUSH USING MAGNETIC FIELD ACTION Russian patent published in 2016 - IPC H02K33/16 H02K33/18 

FIELD: electricity.

SUBSTANCE: invention is referred to electric engineering, to drives of electrical toothbrushes using magnetic field action in order to generate oscillations of the output shaft having selected motion angle and frequency. Magnetic drive mechanism system includes body (10) and rod (22) passing through the body made of magnetisable material such as iron. Drive mechanism comprises additionally a pair of assemblies (14, 16) of permanent magnets fixed inside the body with a gap between them in longitudinal direction. Permanent magnet assemblies include alternating multitude of magnet sections (18) of north pole/south pole passing longitudinally or along perimeter of the drive mechanism. The drive mechanism includes additionally coil winding (24) that surrounds the rod placed between two assemblies of permanent magnets. Assemblies (28, 30) of permanent magnets attached to the rod are placed inside the volume surrounded by assemblies of permanent magnets so that alternating drive signal induces oscillations of the rod with required frequency and amplitude.

EFFECT: decrease of electric drive dimensions.

13 cl, 11 dwg