Patent ID: 9410557
Filing Date: 2016-08-09
CPC Classification: F04D,G06F,H05K

Claim Text:
1. A fan module for an electronic device, comprising: a first fan, having a first pivot portion and a plurality of first fan blades, wherein each of the first fan blades is connected to the first pivot portion and has a first blade face, and the first pivot portion has a first containing cavity; a second fan, having a second pivot portion and a plurality of second fan blades, wherein each of the second fan blades is connected to the second pivot portion and has a second blade face, the second pivot portion is slidably disposed in the first containing cavity along an axis, and the second fan blades respectively correspond to the first fan blades; and an actuator, coupled to the first pivot portion for driving the first fan to rotate around the axis, wherein the first fan drives the second fan to rotate around the axis, wherein when the second pivot portion slides to a first position to protrude out of the first containing cavity, a portion of each of the second blade faces does not overlap with a corresponding one of the first blade faces in a direction perpendicular to the corresponding first blade face, wherein each of the first fan blades has a second containing cavity, when the second pivot portion is located at the first position, each of the second fan blades protrudes out of a corresponding one of the second containing cavities, and when the second pivot portion is located at the second position, each of the second fan blades is located in the corresponding second containing cavity.