An electric cleaning care tool and a pressure alarm method and apparatus for use with the tool, wherein the transducer elastic members (222, 223) of the tool are subjected to a resonance motion with bending strain characteristics and the longitudinal axis (L2) of the drive shaft. ) Are symmetrically distributed on both the left and right sides, the bending section modulus and the length are almost equal, the values of the bending width are almost the same, the bending directions are opposite, and the longitudinal axis (L1) of the cleaning element and the transducer elastic member are The angle between the plane (M) and the normal direction is 0 ° -60 °, the frequency of the alternating current in the drive coil (214) is a fixed value equal to f0max-n, and n is −0.3 (f0max− f0min) to 0.85 (f0max-f0min), where f0max corresponds to the maximum value of the average voltage at the current detection resistor. F0min is the frequency of the current of the driving coil (214), f0min is the frequency of the current of the driving coil (214) corresponding to the minimum value of the average voltage at the current detection resistor, and further increases the mechanical efficiency of the care device； The structure is simple and the cost is low. [Selection diagram] FIG.電動クリーニングケア用具と、当該用具に用いられる圧力アラーム方法及び装置であって、当該用具のトランスジューサ弾性部材（２２２，２２３）は曲げひずみ特性で共振運動に加入されて駆動軸の縦方向軸線（Ｌ２）の左右両側に対称に分布され、その曲げ断面係数と長さがほぼ等しく、たわみ幅の値がほぼ等しくてたわみ方向が反対であり、クリーニング素子の縦方向軸線（Ｌ１）とトランスジューサ弾性部材の平面（Ｍ）の法線方向との角度が０°-６０°であり、駆動コイル（２１４）における交番電流の周波数はｆ０ｍａｘ-ｎに等しい固定値であり、ｎが-０．３（ｆ０ｍａｘ-ｆ０ｍｉｎ）から０．８５（ｆ０ｍａｘ-ｆ０ｍｉｎ）の範囲におけるある固定値であり、ｆ０ｍａｘは電流検出抵抗における平均電圧の最大値に対応する駆動コイル（２１４）の電流の周波数であり、ｆ０ｍｉｎは電流検出抵抗における平均電圧の最小値に対応する駆動コイル（２１４）の電流の周波数であり、当該ケア用具の機械的効率をさらに高くさせ、構造が簡単で、コストが低くなるようにさせる。 【選択図】図３
