Patent ID: 6619385
Filing Date: 2003-09-16
Classification: H01L

Abstract:
A cooling apparatus comprising:a case body having a first wall part with an opening through which air is sucked in; a base having a second wall part which faces said first wall part and cooperating with said first wall part to define a space between said first wall part and said second wall part, said case body being attached to said base; a peripheral wall disposed between said first wall part and said second wall part to surround said space so as to leave a discharge port which communicates with said space; an impeller having a plurality of blades which rotate inside said opening; a motor for rotating said impeller; a housing for said motor; and a plurality of webs for supporting said motor by connecting said housing for said motor and said first wall part; wherein a revolving shaft of said motor is positioned such that its axis extends in a direction which is perpendicular to a direction in which said first wall part and said second wall part extend; said revolving shaft is supported by a bearing fixed to said housing such that said shaft will not come off from said bearing; and air sucked in through said opening is discharged through said discharge port; wherein said plurality of blades are provided with extending portions at ends of said blades, said extending portions extending outward in a radial direction of said shaft and rotate in the space that is outside of said opening, said extending portions of blades being integrally formed with said blades; and wherein an inside shape of said first wall part is defined so that a cross-sectional area of a portion of said space adjacent to said discharge port becomes larger as it approaches toward the discharge port in order to avoid a reduction of airflow.