14 is not varied therefore the same resonant frequency is generated from the lc resonant circuit and is provided to the microprocessor the microprocessor 114 recognizes the balanced state of the tank 100 using a voltage wave form with respect to the continuously inputted same resonant frequency and accelerates the inductance motor 103 using the motor driving unit 115 during a certain dehydration time for thereby dehydrating the laundry in the washtub 101 if the laundry is inclined at a certain wall of the washtub 101 the washtub 101 is eccentrically rotated and the tank 100 is unbalanced based on the eccentric rotation so that the tank 100 is vibrated in the every direction when the tank 100 is vibrated as the first sliding member 202 formed of a magnetic material having a diameter of 3 mm through 5 mm is moved the upper surface of the first support member 201 is moved in the leftward and rightward directions along the inclination surface 201 a at an angle range of 0 u00b0 through 40 u00b0 namely in the u00b1 x directions and the vertical u00b1 z direction for example as shown in fig8 if a certain force vibration is applied in the leftward direction the first sliding member 202.