Fan Device and Electronic Device Thereof

Abstract

A fan device and an electronic device thereof are disclosed. The fan device is disposed in a casing of the electronic device and adjacent to a board of the casing, wherein the board has a first state and a second state. The fan device includes a plurality of fan blades, a shaft, and a ball. The shaft is connected to the plurality of fan blades and allows the plurality of fan blades rotating with the shaft, wherein at least one end of the shaft has a ball accommodating portion and an opening. The ball is disposed in the ball accommodating portion and limited by the opening for not separate from the ball accommodating portion. When the board is in the first state, a gap is between the ball and the casing. When the board is in the second state, the board and the ball touch each other.

What is claimed is: 
     
         1 . A fan device, disposed in a casing of an electronic device and adjacent to a board of the casing, wherein the board has a first state indicating not being applied force and a second state indicating being applied forced, the fan device comprising:
 a plurality of fan blades;   a shaft, connected to the plurality of fan blades and allowing the plurality of fan blades rotating with the shaft, wherein at least one end of the shaft has a ball accommodating portion and an opening communicating with the ball accommodating portion; and   a ball, disposed in the ball accommodating portion and limited by the opening for not separating from the ball accommodating portion;   wherein when the board is in the first state, a gap is between the ball and the board;   when the board is in the second state, the board and the ball touch each other.   
     
     
         2 . The fan device as claimed in  claim 1 , wherein the shaft has two ends, and the ball accommodating portion and the opening are only disposed on one end which is near the board. 
     
     
         3 . The fan device as claimed in  claim 1 , wherein a diameter of the opening is smaller than a diameter of the ball. 
     
     
         4 . The fan device as claimed in  claim 1 , wherein the ball accommodating portion is filled with a lubricating oil. 
     
     
         5 . A fan device, comprising:
 a casing, having a board, and the board having a first state indicating not being applied force and a second state indicating being applied forced;   a plurality of fan blades;   a shaft, connected to the plurality of fan blades and allowing the plurality of fan blades rotating with the shaft, wherein at least one end of the shaft has a ball accommodating portion and an opening communicating with the ball accommodating portion; and   a ball, disposed in the ball accommodating portion and limited by the opening for not separating from the ball accommodating portion;   wherein when the board is in the first state, a gap is between the ball and the board;   when the board is in the second state, the board and the ball touch each other.   
     
     
         6 . The fan device as claimed in  claim 5 , wherein the shaft has two ends, and the ball accommodating portion and the opening are only disposed on one end which is near the board. 
     
     
         7 . The fan device as claimed in  claim 5 , wherein a diameter of the opening is smaller than a diameter of the ball. 
     
     
         8 . The fan device as claimed in  claim 5 , wherein the ball accommodating portion is filled with a lubricating oil. 
     
     
         9 . An electronic device, comprising:
 a casing, having a board, and the board having a first state indicating not being applied force and a second state indicating being applied forced;   a fan device, disposed in the casing and near the board of the casing, the fan device comprising:   a plurality of fan blades;   a shaft, connected to the plurality of fan blades and allowing the plurality of fan blades rotating with the shaft, wherein at least one end of the shaft has a ball accommodating portion and an opening communicating with the ball accommodating portion; and   a ball, disposed in the ball accommodating portion and limited by the opening for not separating from the ball accommodating portion;   wherein when the board is in the first state, a gap is between the ball and the board;   when the board is in the second state, the board and the ball touch each other.   
     
     
         10 . The electronic device as claimed in  claim 9 , wherein the shaft has two ends, and the ball accommodating portion and the opening are only disposed on one end which is near the board. 
     
     
         11 . The electronic device as claimed in  claim 9 , wherein the diameter of the opening is smaller than the diameter of the ball. 
     
     
         12 . The electronic device as claimed in  claim 9 , wherein the ball accommodating portion is filled with a lubricating oil.