Heat sink apparatus, blower for use therein and electronic equipment using the same apparatus

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS.
1A and 1B generally show a blower according to one embodiment of the present invention.
FIG.
1A is a perspective view of the blower as viewed from the suction port side thereof, while FIG.
1B is a perspective view thereof from the exhaust port side thereof.
A blower 1 has an outer frame 3 made of a highly thermally conductive metal such as aluminum, copper or aluminum nitride.
The outer frame 3 has an opening 5 in which a fan 7 is disposed.
In the center of a suction port of the outer frame 3, a bearing portion 11 which supports a rotary shaft 9 of the fan 7 is formed integrally with the outer frame 3.
On the suction port side of the outer frame 3, a pair of attaching portions 17, protecting from opposite side portions 13 of the outer frame 3 to extend beyond a suction surface 15, are formed integrally with the outer frame 3.
In the vicinity of the suction port within the opening 5 of the outer frame 3, radiation fins 19 are formed integrally with the outer frame 3.
The radiation fins 19 are arranged in the opening 5 thereof so as to surround the rotary shaft 9.
One of the side portions 13 of the outer frame 3 is formed with a slit 21 through which a lead wire 23 for electric power source is led out.
A lead holder 25 is inserted in the slit 21 to prevent the lead wire 23 from coming out of the slit 21.
The radiation fins 19 may be formed separately from the outer frame 3 and fixed thereto by means of screws or the like.
FIG.
2 is a sectional view taken along the line II--II of FIG.
1.
The rotary shaft 9 is fitted to the bearing portion 11 through ball bearings 27, and the fan 7 is attached to one end of the rotary shaft 9.
A rotor yoke 29 and a magnet 31 are fixed to an inside of the fan 7.
A stator core 37 is attached to the bearing portion 11 within the opening 5.
A coil 35 is wound around a stator core 37 by way of an insulator 39 to which a base plate 33 of a fan-driving circuit is mounted.
An insulator 39 is disposed between the coil 35 and the stator core 37