Airflow guide

Abstract

An airflow guide includes a top cover and two side covers disposed on opposite ends of the top cover. The top cover includes a first top plate and a second top plate slidably connected to the first top plate. Each side cover includes a base plate fixedly connected to the first top plate, a sliding plate slidably connected to the base plate, and a revolving plate rotatably connected to the sliding plate.

1 . An airflow guide comprising:
 a top cover comprising a first top plate and a second top plate slidably connected the first top plate; and   two side covers disposed on opposite sides of the top cover, wherein each side cover comprises a base plate fixedly connected to the first top plate and a sliding plate slidably connected to the base plate.   
     
     
         2 . The airflow guide of  claim 1 , wherein the first top plate comprises two engaging portions defined in opposite sides of the first top plate, the base plate comprising two fixing portions disposed in opposite end of a side of the base plate, and the fixing portions are engaging the corresponding engaging portions. 
     
     
         3 . The airflow guide of  claim 2 , wherein each fixing portion is a T-shaped protrusion. 
     
     
         4 . The airflow guide of  claim 3 , wherein each engaging portion is a T-shaped groove for receiving the corresponding fixing portion. 
     
     
         5 . The airflow guide of  claim 2 , wherein the first top plate defines a receiving portion in a side of the first top plate adjacent to the two engaging portions to receive the second top plate. 
     
     
         6 . The airflow guide of  claim 2 , wherein first top plate further defines two positioning holes in the opposite sides of the first top plate adjacent to the two engaging portions. 
     
     
         7 . The airflow guide of  claim 6 , wherein the second top plate further comprises two limiting pins arranged at opposite sides of the second top plate, and the limiting pins are received in the corresponding positioning holes. 
     
     
         8 . The airflow guide of  claim 1 , wherein the top cover further comprises a third top plate slidably connected to the second top plate. 
     
     
         9 . The airflow guide of  claim 8 , wherein the second top plate defines a receiving groove in a side of the second top plate to receive the third top plate. 
     
     
         10 . The airflow guide of  claim 9 , wherein the second top plate further defines two positioning holes in opposite sides of the second top plate communicating with the receiving groove. 
     
     
         11 . The airflow guide of  claim 10 , wherein the third top plate comprises two limiting protrusions arranged at opposite sides of the third top plate, and the limiting protrusions are received in the corresponding positioning holes. 
     
     
         12 . The airflow guide of  claim 1 , wherein the base plate defines a holding portion in a side of the base plate to receive the sliding plate. 
     
     
         13 . The airflow guide of  claim 12 , wherein the base plate further defines two positioning holes in opposite sides of the base plate, and the positioning holes are communicating with holding portion. 
     
     
         14 . The airflow guide of  claim 13 , wherein the sliding plate comprises two limiting shafts disposed on opposite ends of a side surface of the sliding plate, and the limiting shafts are received in the two shaft holes. 
     
     
         15 . The airflow guide of  claim 14 , wherein each side cover further comprises a revolving plate rotatably connected to the sliding plate. 
     
     
         16 . The airflow guide of  claim 15 , wherein the sliding plate further comprises two connecting portions disposed on two adjoining corners of an outer surface thereof. 
     
     
         17 . The airflow guide of  claim 16 , wherein the revolving plate comprises two revolving shafts disposed on opposite ends thereof, each connecting portion defining a shaft hole, and the revolving shafts are received in the shaft holes, respectively.