Patent ID: 7573712

Claim:
An electronic device, comprising: a chassis comprising a bottom wall and a sidewall perpendicular to the bottom wall, a circuit board mounted on the bottom wall, a plurality of securing members protruding from a top of the sidewall in a direction perpendicular to the circuit board; and an airflow guiding duct configured for covering a heat dissipating module mounted on the circuit board, the airflow guiding duct comprising a substantially rectangular base, an expanded portion protruding from a front end of the base, and a smaller portion protruding from a rear end of the base, a first opening defined in the smaller portion configured for allowing air to flow into the airflow guiding duct, a second opening configured for allowing air to flow into the airflow guiding duct defined in a corner of the rectangular base adjacent to the smaller portion, a third opening defined in the expanded portion facing the heat dissipating holes in the sidewall of the chassis and configured for allowing air to flow out of the airflow guiding duct.