Fan Motor and Electronic Device Comprising the Same

Abstract

A fan motor and an electric device having the same are disposed. The fan motor and the electronic device having the same are provided with: a stator part including a coil and a stator yoke provided at a lower part of the coil; a rotor part including a magnet spaced apart from an upper surface of a stator yoke and a back yoke tightly provided on the upper surface of the magnet; a fan member including a rotating shaft which rotates to become a rotation center of the rotor part, and a plurality of impellers to which the magnet is fixedly coupled on inner circumferential surfaces of the impellers; a body part accommodating the stator part; and a cover part having an intake hole and an exhaust hole, and provided at an upper end part of the body part to accommodate the plurality of impellers.

1 . A fan motor comprising:
 a stator part comprising a coil and a stator yoke provided at a lower part of the coil;   a rotor part comprising a magnet spaced apart from an upper surface of the stator yoke and a back yoke tightly provided on an upper surface of the magnet;   a fan member comprising a rotating shaft which rotates to become a rotation center of the rotor part, and a plurality of impellers to which the magnet is fixedly coupled on inner circumferential surfaces of the impellers;   a body part accommodating the stator part; and   a cover part having an intake hole and an exhaust hole, and provided at an upper end part of the body part to accommodate the plurality of impellers, wherein the stator yoke is seated in a groove part provided in a bottom surface of the body part as a plate-shaped member, the groove part is provided with a bearing housing for shaft-supporting a sleeve bearing elongated for rotationally supporting the rotating shaft, and the bearing housing is provided by protruding integrally with the body part in a central part where the groove part is provided.   
     
     
         2 . The fan motor of  claim 1 , wherein a circuit board for driving the stator part is disposed at a position between the stator yoke and the magnet. 
     
     
         3 . The fan motor of  claim 1 , wherein an end part of the bearing housing is provided with a bearing support part provided as an inner circumferential surface of the bearing housing to prevent the sleeve bearing from separation. 
     
     
         4 . The fan motor of  claim 3 , wherein the bearing support part prevents a bearing from separation by fixing the bearing through insert injection molding, at least one caulking, or heat welding. 
     
     
         5 . The fan motor of  claim 4 , further comprising:
 a separation prevention member provided at a position between the bearing support and the bearing.   
     
     
         6 . The fan motor of  claim 1 , wherein the bearing housing is provided with a stopper part for matching centers of gravity of the rotor part and the sleeve bearing. 
     
     
         7 . The fan motor of  claim 2 , wherein the bearing housing is simultaneously accommodated inside the stator part, inside the rotor part, and inside the circuit board. 
     
     
         8 . The fan motor of  claim 1 , wherein the stator yoke is provided at a position in the groove part of the body part, and is fixed by insert injection molding or heat welding. 
     
     
         9 . The fan motor of  claim 1 , wherein the stator yoke has a polygonal shape. 
     
     
         10 . The fan motor of  claim 1 , wherein the coil of the stator part is a hollow coil, having a square shape. 
     
     
         11 . (canceled)