Fan assembly and air shield apparatus

Abstract

An air shield apparatus includes a bracket and a number of baffles. The bracket includes a first side plate and a second side plate opposite to the first side plate. The first side plate defines a number of first shaft holes, and the second side plate defines a number of second shaft holes aligning with the first shaft holes. Each baffle includes a blocking piece between the first and second side plates, and two opposite posts protruding out from two opposite ends of the blocking piece. The posts of the baffles are pivotably received in the first shaft holes and the second shaft holes. An inner wall of each shaft hole defines a helical guiding groove. A helical sliding portion winds around each shaft. The sliding portion of each baffle is rotatably received in the corresponding guiding groove of the first and second side plates.

What is claimed is: 
     
         1 . An air shield apparatus, comprising:
 a bracket comprising a first side plate and a second side plate opposite to the first side plate, wherein the first side plate defines a plurality of first shaft holes, and the second side plate defines a plurality of second shaft holes aligning with the corresponding first shaft holes; and   a plurality of baffles each comprising a blocking piece placed between the first and second side plates and two opposite posts protruding out from two opposite ends of a top side of the blocking piece;   wherein the posts are pivotably received in the corresponding first shaft holes and the corresponding second shaft holes of the bracket, an inner wall bounding each first shaft hole defines a helical guiding groove, a helical sliding portion protrudes out from one of the posts of each baffle, the sliding portions of the baffles are rotatably received in the guiding grooves of the first side plate.   
     
     
         2 . The air shield apparatus of  claim 1 , wherein the first side plate comprises a plurality of connecting members mounted on an inner side of the first side plate, the plurality of first shaft holes is defined in the plurality of connecting members. 
     
     
         3 . The air shield apparatus of  claim 2 , wherein the first side plate defines a plurality of mounting holes aligning with the corresponding second shaft holes of the second side plate, the plurality of connecting members is latched in the corresponding mounting holes of the first side plate. 
     
     
         4 . The air shield apparatus of  claim 3 , wherein each connecting member comprises a latching portion mounted in the corresponding mounting hole of the first side plate, and a positioning portion protruding out from an end of the latching portion, each first shaft hole is axially defined in the corresponding positioning portion. 
     
     
         5 . A fan assembly, comprising:
 a shell defining an air outlet;   a fan received in the shell and aligning with the air outlet; and   an air shield apparatus comprising a bracket mounted to the shell and a plurality of baffles pivotably mounted to the bracket to cover or uncover the air outlet;   wherein the bracket comprises a first side plate and a second side plate opposite to the first side plate, the first side plate defines a plurality of first shaft holes, the second side plate defines a plurality of second shaft holes aligning with the corresponding first shaft holes of the first side plate, each baffle comprises a blocking piece placed between the first and second side plates and two opposite posts protruding out from two opposite ends of the blocking piece, the posts of the baffles are pivotably received in the first and second shaft holes of the bracket, an inner wall bounding each first shaft hole defines a helical guiding groove, a helical sliding portion protrudes out from one of the posts of each baffle, the sliding portion of each baffle is rotatably received in the corresponding guiding groove of the first side plate.   
     
     
         6 . The fan assembly of  claim 5 , wherein the first side plate comprises a plurality of connecting members mounted to an inner side of the first side plate, the plurality of first shaft holes is defined in the connecting members. 
     
     
         7 . The fan assembly of  claim 6 , wherein the first side plate defines a plurality of mounting holes aligning with the corresponding second shaft holes of the second side plate, the plurality of connecting members is latched in the corresponding mounting holes of the first side plate. 
     
     
         8 . The fan assembly of  claim 7 , wherein each connecting member comprises a latching portion mounted in the corresponding mounting hole of the first side plate and a positioning portion protruding out from an end of the latching portion, each first shaft hole is axially defined in the corresponding positioning portion.