An electrical appliance for cleaning and providing care, a pressure alarming method using the appliance, and a pressure alarming apparatus. Transducer elastic members (222, 223) of the appliance engage in harmonic motion with bending strain characteristics and are symmetrically distributed at the left and right sides of the longitudinal axis (L2) of a drive shaft, the section moduli in bending and the lengths thereof being approximately equal, the deflection amplitudes being approximately equal while the flexure directions are opposite, the included angle between the longitudinal axis (L1) of a cleaning member and the normal of the transducer elastic member plane (M) being 0°-60°； the frequency of the alternating current in a drive coil (214) is equal to the fixed value of f0max-n, where n is a certain fixed value in the range of -0.3(f0max-f0min) to 0.85(f0max-f0min), and f0max is the current frequency of the drive coil (214) corresponding to the maximum value of the average voltage of a current sensing resistor, and f0min is the current frequency of the drive coil (214) corresponding to the minimum value of the average voltage of the current sensing resistor； therefore, the care appliance has a higher mechanical efficiency, a simple structure and a lower cost.L'invention concerne un appareil électrique pour le nettoyage et la fourniture de soins, un procédé d'alarme de pression utilisant l'appareil, et un appareil d'alarme de pression. Des éléments élastiques de transducteur (222, 223) de l'appareil réalisent un mouvement harmonique avec des caractéristiques de contrainte de flexion et sont répartis symétriquement sur les côtés gauche et droit de l'axe longitudinal (L2) d'un arbre de transmission, les modules de section en flexion et leurs longueurs étant approximativement égaux, les amplitudes de déviation étant approximativement égales tandis que les directions de flexion sont opposées, l'angle inclus entre l'axe longitudinal (L1) d'un élément de nettoyage et la
