Refrigerator includes a second door disposed on a first door, a shelf disposed on the first door, a connection assembly connecting the shelf to the second door and linking opening of the second door to rotate the shelf

A refrigerator comprising:

• a cabinet;
• a storage compartment within the cabinet;
• a first door configured to open and close the storage compartment;
• an accommodation device that defines an accommodation space opened toward a front surface of the first door and that is configured to move with the first door when the first door rotates between opened and closed positions;
• a second door that is disposed on the first door, that is configured to open and close the accommodation device, and that enables access to the accommodation space when the first door is oriented in a closed position;
• a shelf that is disposed on the first door, that is configured to, when the second door opens, rotate from a stored position located within the accommodation space to a supporting position extended out of the accommodation space, and that is configured to, when the second door closes, rotate from the supporting position to the stored position;
• a connection assembly that connects the shelf to the second door, that is configured to, when the second door opens, cause the shelf to rotate from the stored position to the supporting position, and that is configured to, when the second door closes, cause the shelf to rotate from the supporting position to the stored position;
• and
• a damping unit configured to absorb shock of the shelf during rotation of the shelf to reduce a rotation speed of the shelf,
• wherein the refrigerator further comprises a ball-shaped joint member located at a first end of the connection assembly and coupled to a bottom surface of the shelf, and
• wherein the first end of the connection assembly is rotatably coupled to the shelf by the joint member and a second end of the connection assembly is rotatably coupled to the second door.