Cross flow fan apparatus, electronic apparatus and impeller

Abstract

A cross flow fan apparatus is provided. The cross flow fan apparatus includes an impeller having a plurality of blades extending in a predetermined direction, a motor, having a rotating shaft provided along the predetermined direction, which drives to rotate the impeller and a supporting body which supports the motor such that the impeller is cantilevered by the rotating shaft.

1 . A cross flow fan apparatus comprising: 
 an impeller having a plurality of blades extending in a predetermined direction;    a motor, having a rotating shaft provided along the predetermined direction, which drives to rotate the impeller; and    a supporting body which supports the motor such that the impeller is cantilevered by the rotating shaft.    
   
   
       2 . The cross flow fan apparatus as recited in  claim 1 , wherein the impeller is made of a resin.  
   
   
       3 . The cross flow fan apparatus as recited in  claim 2 , wherein the impeller has a joint portion which joins the plurality of blades at both ends thereof, the joint portion being integrally molded with each of the plurality of blades.  
   
   
       4 . The cross flow fan apparatus as recited in  claim 1 , wherein the motor has a fluid bearing that supports the rotating shaft.  
   
   
       5 . The cross flow fan apparatus as recited in  claim 1 , further comprising: 
 a supporting mechanism, disposed at a position opposite to the position where the motor is disposed and that supports the impeller in a noncontact manner.    
   
   
       6 . The cross flow fan apparatus as recited in  claim 5 , wherein the supporting mechanism includes: 
 a shaft member made of a magnetic material attached to the impeller coaxially with the rotating shaft, and    a magnet provided in the supporting body and placed near the shaft member.    
   
   
       7 . The cross flow fan apparatus as recited in  claim 1 , wherein the blades are arranged in a ring shape, and 
 wherein the impeller has a ring-shaped joint plate disposed at a position opposite to the position where the motor is disposed and joins each of the plurality of blades together,    the cross flow fan apparatus further comprising:    a projecting member, being disposed in the supporting body and that penetrates into an area surrounded by the blades from an outside of the impeller through an inside of the ring-shaped joint plate.    
   
   
       8 . The cross flow fan apparatus as recited in  claim 3 , wherein each of the plurality of blades includes: 
 a first main face, being a flat surface and disposed parallel to the direction of the rotating shaft; and    a second main face, being a flat surface and disposed at an angle to the first main face, parallel to the direction of the rotating shaft and opposite to the first main face.    
   
   
       9 . The cross flow fan apparatus as recited in  claim 1 , wherein the impeller includes an engaging portion for joining a plurality of the impellers together in the predetermined direction.  
   
   
       10 . A cross flow fan apparatus comprising: 
 an impeller having a plurality of blades extending in a predetermined direction, a first side in the predetermined direction, and a second side opposite to the first side;    a pivot shaft attached to the first side of the impeller, and disposed along the predetermined direction;    a motor, having a rotating shaft being coaxial with the pivot shaft and supporting the impeller at the second side, which drives to rotate the impeller; and    a supporting body which supports the motor, having a seating surface for pivot, where a tip end of the pivot shaft is in contact.    
   
   
       11 . The cross flow fan apparatus as recited in  claim 10 , wherein the seating surface for pivot is a flat surface.  
   
   
       12 . The cross flow fan apparatus as recited in  claim 10 , wherein the seating surface for pivot is a curved surface.  
   
   
       13 . An electronic apparatus comprising: 
 a heat generator;    a cross flow fan apparatus which includes    an impeller having a plurality of blades extending in a predetermined direction,    a motor that drives to rotate the impeller, and    a supporting body that supports the motor such that the impeller is cantilevered by the rotating shaft; and    a casing in which the heat generator and the cross flow fan apparatus are disposed.    
   
   
       14 . An electronic apparatus comprising: 
 a heat generator;    a cross flow fan apparatus which includes 
 an impeller having a plurality of blades extending in a predetermined direction, a first side in the predetermined direction, and a second side opposite to the first side,  
 a pivot shaft attached to the first side of the impeller, and disposed along the predetermined direction,  
 a motor, having a rotating shaft being coaxial with the pivot shaft and supporting the impeller at the second side, which drives to rotate the impeller, and  
 a supporting body which supports the motor, having a seating surface for pivot, where a tip end of the pivot shaft is in contact; and  
   a casing in which the heat generator and the cross flow fan apparatus are disposed.    
   
   
       15 . An impeller comprising: 
 a plurality of blades extending in a predetermined direction, each of the blades includes 
 a first main face, being a flat surface and disposed in the predetermined direction, and  
 a second main face, being a flat surface and disposed approximately parallel to the direction of the rotating shaft and opposite to the first main face; and  
   a joint member which joins the blades together.