Patent ID: 7992951

Claim:
A door opening and closing device for a refrigerator comprising: a plurality of doors to open and close a refrigerator main body; a hinge unit configured to connect each door to the refrigerator main body so that the door can perform rotational motion or translational motion against the refrigerator main body; first interference units provided between each door and the refrigerator main body, and contacting therebetween from a state in which the door is closed to a state in which the door is opened to a designated angle, the first interference units causing the door to move outwardly in a width direction of the door during opening, the first interference units comprising a first horizontally extending cam member fixed to one of the refrigerator main body and a door, and a first horizontally extending cam contact lever fixed to the other of the refrigerator body and door and contacting the first cam member to separate the doors; and second interference units provided between each door and the refrigerator main body, and contacting therebetween during a state in which the door is opened to an angle greater than the designated angle, the second interference units causing the door to move outwardly in a width direction of the door during closing, wherein the second interference units comprise a second horizontally extending cam member fixed to one of the refrigerator main body and the door, and a second horizontally extending cam contact lever fixed to the other of the refrigerator main body and door and contacting the second horizontally extending cam member to separate the doors, wherein the second cam member is located on the upper surface of the door, and the second cam contact lever protrudes horizontally from the upper surface of the refrigerator main body toward the door, and wherein a portion of a cam plane of the second cam member, contacting the second cam contact lever when the door is opened above the designated angle, is curved at a gradient less than that of the other portion of the cam plane of the second cam member, said portions of the cam plane being divided by a vertex.