Latch module and an appliance using the same

A latch module for opening and closing a door of an appliance, comprising:

• a latch;
• a spring that applies an elastic force to the latch;
• a drive that provides power to move the latch;
• a cam that transmits the power of the drive to the latch,
• wherein the spring and the cam move the latch in a first basic position, a second basic position in which the latch is moved in a second direction from the first basic position, and a third basic position in which the latch is moved in a first direction from the first basic position, and
• wherein the first basic position is a position in which, when an external force greater than the elastic force of the spring is applied to the door, the external force on the door causes the latch to move in the second direction and releases the latch from an engaging structure so that the door is opened,
• the second basic position is a position in which the latch is not engaged with the engaging structure, and,
• the third basic position is a position in which, even if the external force is applied to the door, a state in which the latch is engaged with the engaging structure is maintained.