US Patent 7490495 Drum washing machine with automatically vertically-openable/closable door

A drum washing machine includes a cabinet with an opening formed at a front wall of the cabinet to allow laundry to be put into or taken out of the cabinet, a door to open or close the opening of the cabinet, an opening/closing guide mechanism connected between the cabinet and the door to guide the door downwardly when opening the door such that a front surface of the door is directed upwardly when the door is fully opened, and to guide the door upwardly when closing the door, and an automatic opening/closing mechanism to automatically move the door vertically, and thus, to automatically open/close the door.