Patent ID: 7807284

Claim:
A fan structure comprising: a fan case having an inlet and an outlet; a bladed wheel provided inside the fan case; a motor for rotating the bladed wheel; a circuit substrate for controlling the motor, the circuit substrate and the motor being arranged inside the fan case; a scroll housing formed between the fan case and the bladed wheel, rotation of the bladed wheel causing a fluid to enter the scroll housing from the inlet and to exit from the outlet; a waterproof member for dividing the motor and the circuit substrate from the scroll housing, the waterproof member having a hole formed therein through which an output shaft of the motor extends, the waterproof member comprising a part that extends up from the hole, wherein the part extending up from the hole does not contact the output shaft; and a sealing part fixedly attached to the output shaft, the sealing part for sealing the hole of the waterproof member, wherein the sealing part includes: an attachment boss secured to the output shaft, wherein the attachment boss extends downward to fit between the part of the waterproof member and the output shaft; and a cylindrical portion extending from the attachment boss that fits with the part of the waterproof member with a gap being formed between the sealing part and the part of the waterproof member, the gap further formed around an inner circumference of the part and around an outer circumference of the part and at a top of the part.