Heat dissipating fin assembly

Abstract

A heat dissipating fin assembly includes a bottom plate, a plurality of first heat dissipating fins, a plurality of second heat dissipating fins, an inner cover plate and an outer cover plate. The first heat dissipating fins extend from an inner end to an outer end. The second heat dissipating fins are located between two of the first heat dissipating fins. The inner cover plate is disposed at the inner end and connected to the first heat dissipating fins. The outer cover plate is disposed at the outer end and connected to the second heat dissipating fins. The outer cover plate and the inner cover plate are separated so as to form an opening. The second heat dissipating fins extend from around the opening to the outer end. The length of the first heat dissipating fins is larger than that of the second heat dissipating fins.

What is claimed is: 
     
         1 . A heat dissipating fin assembly suitable for a fan, wherein the heat dissipating fin assembly has an inner end adjacent to the fan and an outer end away from the fan, the heat dissipating fin assembly comprising:
 a bottom plate;   a plurality of first heat dissipating fins disposed on the bottom plate side by side and extending from the inner end to the outer end;   a plurality of second heat dissipating fins disposed on the bottom plate and located between two of the first heat dissipating fins;   an inner cover plate disposed at the inner end and connected to one side of the first heat dissipating fins away from the bottom plate; and   an outer cover plate disposed at the outer end and connected to one side of the second heat dissipating fins away from the bottom plate, wherein the outer cover plate and the inner cover plate are separated so as to form an opening;   wherein, the second heat dissipating fins extend from around the opening to the outer end, and the length of the first heat dissipating fins is larger than that of the second heat dissipating fins.   
     
     
         2 . The heat dissipating fin assembly of  claim 1 , wherein each of the second heat dissipating fins has a slant edge corresponding to the position of the opening, and the slant edge extends obliquely and upwardly from the inner end to the outer end. 
     
     
         3 . The heat dissipating fin assembly of  claim 1 , wherein the fan is a centrifugal fan. 
     
     
         4 . The heat dissipating fin assembly of  claim 1 , wherein any adjacent two of the first heat dissipating fins are interposed with one of the second heat dissipating fins. 
     
     
         5 . The heat dissipating fin assembly of  claim 1 , wherein any adjacent two of the first heat dissipating fins are interposed with at least two of the second heat dissipating fins. 
     
     
         6 . The heat dissipating fin assembly of  claim 1 , wherein any adjacent two of the first heat dissipating fins are interposed with different amount of the second heat dissipating fins. 
     
     
         7 . The heat dissipating fin assembly of  claim 1 , wherein a hole is configured on a side wall of a fan frame of the fan adjacent to an outlet. 
     
     
         8 . The heat dissipating fin assembly of  claim 7 , wherein any adjacent two of the first heat dissipating fins located close to the hole are interposed with less amount of the second heat dissipating fins, while any adjacent two of the first heat dissipating fins located away from the hole are interposed with greater amount of the second heat dissipating fins. 
     
     
         9 . A heat dissipating fin assembly suitable for a fan, wherein the heat dissipating fin assembly has an inner end adjacent to the fan and an outer end away from the fan, the heat dissipating fin assembly comprising:
 a plurality of first heat dissipating fins, wherein each of the first heat dissipating fins comprises a first fin body, a first bottom extension portion, a first inner cover extension portion and a first outer cover extension portion, the first bottom extension portion turns and extends from the first fin body, the first inner cover extension portion is disposed at the inner end and connected to one side of the first fin body away from the first bottom extension portion, and the first outer cover extension portion is disposed at the outer end and connected to one side of the first fin body away from the first bottom extension portion; and   a plurality of second heat dissipating fins, wherein each of the second heat dissipating fins comprises a second fin body, a second bottom extension portion and a second outer cover extension portion, the second bottom extension portion turns and extends from the second fin body, the second outer cover extension portion is disposed at the outer end and connected to one side of the second fin body away from the second bottom extension portion;   wherein, the length of the first heat dissipating fins is larger than that of the second heat dissipating fins, the second heat dissipating fins and the first heat dissipating fins are arranged side by side, and the first inner cover extension portions, the first outer cover extension portions and the second outer cover extension portions form an opening.   
     
     
         10 . The heat dissipating fin assembly of  claim 9 , wherein each of the second fin bodies has a slant edge corresponding to the position of the opening, and the slant edge extends obliquely and upwardly from the inner end to the outer end. 
     
     
         11 . The heat dissipating fin assembly of  claim 9 , wherein the fan is a centrifugal fan. 
     
     
         12 . The heat dissipating fin assembly of  claim 9 , wherein any adjacent two of the first heat dissipating fins are interposed with one of the second heat dissipating fins. 
     
     
         13 . The heat dissipating fin assembly of  claim 9 , wherein any adjacent two of the first heat dissipating fins are interposed with at least two of the second heat dissipating fins. 
     
     
         14 . The heat dissipating fin assembly of  claim 9 , wherein any adjacent two of the first heat dissipating fins are interposed with different amount of the second heat dissipating fins. 
     
     
         15 . The heat dissipating fin assembly of  claim 9 , wherein a hole is configured on a side wall of a fan frame of the fan adjacent to an outlet. 
     
     
         16 . The heat dissipating fin assembly of  claim 15 , wherein any adjacent two of the first heat dissipating fins located close to the hole are interposed with less amount of the second heat dissipating fins, while any adjacent two of the first heat dissipating fins located away from the hole are interposed with greater amount of the second heat dissipating fins.