A fan device includes: a stator core having a plurality of salient poles that protrude outwards in a radial direction; a rotor magnet that is rotatably provided outside the stator core; and a dustproof cover mounted to the stator core and positioned between the stator core and the rotor magnet, wherein the dustproof cover has a cylindrical part having an inner surface being provided with one or more convex part, the convex part being fitted into a slot gap between distal ends of adjacent two of the salient poles.
1. A fan device, comprising:
a stator core having a plurality of salient poles that protrude outwards in a radial direction;
a rotor magnet that is rotatably provided outside the stator core; and
a dustproof cover mounted to the stator core and positioned between the stator core and the rotor magnet,
wherein the dustproof cover has a cylindrical part having an outer wall with an inner surface being provided with one or more convex part, the convex part being fitted into a slot gap between distal ends of adjacent two of the salient poles, and
wherein the outer wall of the cylindrical part of the dustproof cover has a tapered shape extending along the entire length of the outer wall such that a diameter thereof enlarges towards a direction in which the cylindrical part is mounted to the stator core.
2. The fan device according to claim 1 ,
wherein the convex part includes a protrusion extending in an axial direction.
3. The fan device according to claim 1 ,
wherein a width of the convex part is equal to or greater than a width of the slot gap in a circumferential direction in a state where the convex part is unfitted into the slot gap.
4. The fan device according to claim 1 ,
wherein the dustproof cover is made of flexible resin.
5. A fan device, comprising:
a stator core having a plurality of salient poles that protrude outwards in a radial direction;
a rotor magnet that is rotatably provided outside the stator core; and
a dustproof cover mounted to the stator core and positioned between the stator core and the rotor magnet,
wherein the dustproof cover has a cylindrical part having an inner surface being provided with one or more convex part, the convex part being fitted into a slot gap between distal ends of adjacent two of the salient poles, and
wherein the dustproof cover is made of a transparent material.
6. The fan device according to claim 5 ,
wherein the convex part includes a protrusion extending in an axial direction.
7. The fan device according to claim 5 ,
wherein a width of the convex part is equal to or greater than a width of the slot gap in a circumferential direction in a state where the convex part is unfitted into the slot gap.
8. The fan device according to claim 5 ,
wherein the dustproof cover is made of flexible resin.