Patent ID: 7228718

Claim:
A wobbling washing machine, comprising: a housing which defines an outer appearance of the wobbling washing machine; a tub to receive laundry; a washboard which wobbles to wash the laundry; a motor having a preset speed corresponding to a weight load of the laundry which rotates to cause the washboard to wobble; a motor speed sensor which measures a time for the motor to reach the preset speed; a control unit which controls a wobbling speed of the washboard, comprising: a water level sensing unit which senses a level of wash water supplied to the wobbling washing machine; a weight sensing unit which senses the weight load of the laundry; and a speed varying unit which varies the wobbling speed of the washboard to correspond to the weight load of the laundry, wherein the control unit detects the weight load of the laundry based on the time measured by the motor speed sensor.