Patent ID: 9562713
Date: 2017-02-07
CPC Classifications: E05B,E05C,F25D

Claim:
1. A refrigerator comprising: a cabinet defining a storage compartment; a main door having a front surface and a rear surface, the main door being configured to open and close the storage compartment; an auxiliary storage compartment provided to the rear surface of the main door, an access opening being provided in the main door to allow access to the auxiliary storage compartment from the front surface of the main door; a sub-door having a front surface and a rear surface, the sub-door being configured to open and close the access opening such that, based on the sub-door being oriented in a closed position, the rear surface of the sub-door contacts the front surface of the main door to close the access opening; a button exposed at the sub-door and configured to receive input provided by a user; a hook member having a pivot shaft, the hook member protruding from the rear surface of the sub-door and being configured to rotate within the sub-door about the pivot shaft in response to receipt of user input at the button; a locking member provided in a groove located on the front surface of the main door and configured to be selectively coupled to the hook member; a link member selectively coupled to the hook member and configured to rotate the hook member in response to receipt of user input at the button; a first elastic member provided between an interior of the sub-door and an extension extending from the pivot shaft of the hook member to support the extension, the first elastic member being configured to return the hook member to an original position of the hook member; and a second elastic member provided between the interior of the sub-door and the button to support the button, the second elastic member being configured to return the button to an original position of the button.