BLOWER FAN AND ELECTRONIC DEVICE

摘要

A blower fan according to a preferred embodiment of the present invention is a centrifugal fan including a stationary portion, a bearing mechanism, and a rotating portion. The stationary portion includes a lower plate portion and a stator. The stator includes a plurality of teeth each of which has a radially inner end including an upward projecting portion arranged to extend axially upward.

主权项

1. A blower fan comprising:
a stationary portion; a bearing mechanism; and a rotating portion supported by the bearing mechanism to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion; wherein the stationary portion includes:
a lower plate portion arranged to extend in directions away from the central axis; anda stator arranged on the lower plate portion, and including a plurality of teeth arranged to project radially inward from an annular core back, a radially inner end of each tooth including an upward projecting portion arranged to extend axially upward; the rotating portion includes:
a rotor magnet arranged in an annular shape, and arranged radially inside the stator;a rotor hub portion to which the rotor magnet is directly fixed or indirectly fixed with another member intervening therebetween; andan impeller portion fixed to the rotor hub portion; the impeller portion includes a plurality of blades arranged in a circumferential direction; at least a portion of each of the blades is arranged above the stator; when a side wall portion arranged to surround an outer circumference of the impeller portion and an upper plate portion arranged above the impeller portion are present, the lower plate portion is arranged to define an air channel portion in which an air is caused by the impeller portion to flow in the circumferential direction and an air outlet arranged on a lateral side of the impeller portion together with the side wall portion and the upper plate portion; and at least one of the upper plate portion and the lower plate portion includes an air inlet.