Vibration control device for washing machine

A vibration control device for a washing machine, comprising:

• a drum configured to store laundry inside;
• a washing tank to house the drum, the washing tank being attached to a chassis of the washing machine by a suspension;
• a driving motor to drive the drum;
• an acceleration detecting unit to detect an acceleration in the horizontal direction of the washing tank;
• a linear actuator fixed to the chassis of the washing machine to generate a force in the horizontal direction;
• a force transmitting unit to connect a movable axis of the linear actuator with the washing tank, to transmit the force generated by the linear actuator in the horizontal direction to the washing tank, and to mechanically absorb a displacement of the drum in the back and forth direction and in the up and down direction relative to the tank;
• and
• a control unit to control the force of the linear actuator based on the acceleration in the horizontal direction detected by the acceleration detecting unit, wherein:
• the force transmitting unit has a first spherical face link unit with one end fixed to move with the washing tank, a second spherical face link unit with one end fixed to move with the movable axis of the linear actuator, and a connecting member cooperating with the other ends of the first spherical face link unit and the second spherical face link unit to connect together both the first and second spherical face link units,
• the first spherical face link unit and the second spherical face link unit are constructed to permit the connecting member to rotate in the up and down direction, and
• the first spherical face link unit and the second spherical face link unit are constructed to permit the connecting member to rotate in the back and forth direction.