RESONANCE DRIVEN ELECTRIC TOOTH BRUSH CAPABLE OF RESPONDING TO PRESSURE USING HALL SENSOR Russian patent published in 2017 - IPC A46B15/00 

FIELD: medicine.

SUBSTANCE: toothbrush includes a handle with an energy-driven drive system (14). The brush also includes a cleaning head unit (20) with a cleaning head arm with a cleaning element (21) at its distal end. The drive unit (12) is sensitive to the drive signal from the power supply unit to convert the power supply action to the cleaning head unit movement. The magnet (30) is fixed to the rear of the drive mechanism, wherein the Hall sensor (32) is installed in a magnetic field created by the magnet when moving during operation. The pressure on the cleaning element creates a phase shift of the Hall sensor output signal. The processor (15) determines the magnitude of the Hall sensor signal phase shift when pressure is applied to the cleaning element, and generates a signal indicating the applied pressure by using the stored information (71), correlating the phase shift with the pressure for the individual device.

EFFECT: effective cleaning of all teeth without gum line damaging.

9 cl, 6 dwg