Fan having a balance correction portion

  • US 8,899,946 B2
  • Filed: 04/03/2012
  • Issued: 12/02/2014
  • Est. Priority Date: 06/30/2011
  • Status: Active Grant
First Claim
Patent Images

1. A fan comprising:

  • a motor including a rotating portion having a magnet, and a stationary portion;

    an impeller including a plurality of blades and a blade support portion to which the blades are fixed, and arranged to cover the motor; and

    a housing including a lower plate portion arranged to cover a lower side of the blades, a side wall portion arranged to cover sides of the blades and including an air outlet which opens radially outward, and an upper plate portion arranged above an upper side of the blades and including an air inlet arranged to extend through the upper plate portion in an axial direction such that an air is drawn inside the housing from the air inlet and sent out through the air outlet when the impeller is rotated;

    whereina lower surface of the blade support portion includes a balance correction portion radially between the magnet and the blades;

    a balancing member attached to the balance correction portion; and

    the lower plate portion includes a through hole arranged to overlap with the balance correction portion in the axial direction to make a portion of the balance correction portion viewable from below the lower plate portion.

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