Patent ID: 7556033

Claim:
A door opening and closing system in an electric oven, the system comprising: at least one latch provided at one side of a door; a door interlocking structure including: a switch; and a rotary lever being rotated by the at least one latch at a first side of the rotary lever when the door is moved from an open position to a closed position, the rotary lever having a first engagement portion and a second engagement portion at a second side of the rotary lever opposite the first side, the first engagement portion and second engagement portion coming in contact in seriatim with the switch unit as the rotary lever is rotated to indicate when the door is in the open position, an intermediate position between the open position and the closed position, and the closed position; and a door locking structure including: a motor having a rotary shaft; a rotary unit; and a latch guide, wherein the rotary shaft is rotated by the motor when the door interlocking structure indicates that the door is closed, the rotary unit is rotated by the rotary shaft of the motor, and the latch guide cooperates with the rotary unit to change a rotation motion of the rotary unit into a straight-line motion of the latch guide such that the latch guide contacts the at least one latch to prevent opening of the door.