Patent ID: 8395892

Claim:
An air duct comprising: a top panel; and a blocking member rotatably secured to the top panel, a through hole defined in the top panel, and a pair of clipping portions located on an edge of the through hole, the blocking member comprising an operating portion and a blocking portion connected to the operating portion, the operating portion located on an outside of the top panel, and the blocking portion located on an inside of the top panel; wherein the operating portion of the blocking member is passed through a bottom surface of the top panel through the through hole, extends to a top surface of the top panel, and is engaged with the pair of clipping portions wherein the operating portion is substantially perpendicular to the blocking portion, and wherein the blocking member is configured to rotate between a first position and a second position; in the first position, the operating portion is substantially perpendicular to the top panel, and the blocking portion is substantially parallel to the top panel; and in the second position, a first acute angle is defined between the operating portion and the top panel, and a second acute angle is defined between the blocking portion and the top panel.