US Patent 11540627 Serving module and robot having the same

According to the present embodiment, a serving module includes: a tray; a main body formed therein with a tray space configured to accommodate the tray and having a tray entrance; a tray moving device configured to move at least a part of the tray out of the tray entrance or move an entire of the tray into the tray space; a door configured to open and close the tray entrance; and a door driving device connected to the door to open and close the door.