A drive apparatus for an electronic toothbrush includes a stator having a permanent-magnet, a first stator partial and a second stator partial adhered to two sides of the permanent-magnet to form a space between them and a rotor located in the space. The rotor shaped as an alphabet I includes an upper portion, a down portion and a connecting portion between the upper portion and the down portion. A coil surrounds the connection portion of the rotor. When an electric alternating current flows in the coil, a corresponding pair of magnetic poles is generated in the upper portion and the down portion alternatively. The rotor is driven by the corresponding magnetic poles interacting with the magnetic field generated by the permanent-magnet in the stator.一電動牙刷刷頭驅動裝置包含:一定子,包括一永久磁鐵,以及分別貼附於永久磁鐵之兩側面之一第一定子部份以及一第二定子部份,以形成一容置空間;以及一轉子設置於該容置空間中,該轉子為導通磁力線之工字型結構,包括一上端部、一下端部和一連接該上端部和該下端部之連接部,其中一線圈圈繞經工字型之平坦部,當該線圈通一交流變化電流後,會使得該轉子之該上端部和該下端部感應出一對應磁極,使得該轉子之該上端部和該下端部以相反方向分別朝向該第一定子部份以及一第二定子部份旋轉移動而產生一往復旋轉扭力。212...驅動裝置2121...定子部份2122...轉子2123...永久磁鐵2144...槽2146...線圈
