Heat sink with protective outer buckling plate

Abstract

An exemplary heat sink includes a fin group, and a buckling plate. The fin group includes a plurality of first fins, and a second fin coupled to the first fin located at the outmost side. The second fin includes a first body and a first flange bending from a side of the first body. The first flange defines a first buckling hole therein and forms a tab in the vicinity of the first buckling hole. The buckling plate includes a second body and a second flange bending from a side of the second body. The second flange of the buckling plate faces and abuts against the first flange of the second fin. The tab of the second fin extends through the buckling plate to buckle the second fin with the buckling plate together.

1 . A heat sink comprising:
 a fin group, the fin group comprising:
 a plurality of first fins connected together; and 
 a second fin coupled to the first fin located at the outmost side of the plurality of first fins, the second fin comprising a first body and a first flange bending from a side of the first body, the first flange defining a first buckling hole therein and forming a tab in the vicinity of the first buckling hole; and 
   a buckling plate, the buckling plate comprising:
 a second body; and 
 a second flange bending from a side of the second body, the second flange facing and abutting against the first flange of the second fin, and the tab of the second fin extending through the buckling plate to buckle the second fin and the buckling plate together. 
   
     
     
         2 . The heat sink of  claim 1 , wherein the second body of the buckling plate defines a second buckling hole near the second flange, the second buckling hole corresponding with the tab of the second fin, the tab of the second fin being bent and extending through the second buckling hole of the buckling plate to buckle the second fin with the buckling plate together. 
     
     
         3 . The heat sink of  claim 1 , wherein each of the first fins comprises a body and a flange bending from a side of the body, the flange of each first fin extending along a same direction and abutting against the body of an adjacent first fin, the flange of each first fin defining a buckling hole therein and forming a buckling sheet in the vicinity of the buckling hole, the buckling sheet of the first fin at the outmost side being received in the first buckling hole of the second fin. 
     
     
         4 . The heat sink of  claim 3 , wherein a protrusion protrudes outwardly from an edge of the body of each first fin near the buckling hole, the buckling sheet of one first fin being received in the buckling hole of another first fin, the protrusion of the another first fin being buckled in the buckling hole of the one first fin. 
     
     
         5 . The heat sink of  claim 4 , wherein the buckling sheet of each first fin comprises a main body and an extending portion, the buckling hole of each first fin comprising a main portion and an extending portion, the main body of the buckling sheet of the one first fin being received in the main portion of the buckling hole of the another first fin, the extending portion of the buckling sheet of the one first fin being received in the extending portion of the buckling hole of the another first fin, the protrusion of the another first fin being buckled in the extending portion of the buckling hole of the one first fin. 
     
     
         6 . The heat sink of  claim 5 , wherein the extending portion of the buckling hole of the first fin has an extending distance equal to an extending distance of the extending portion of the buckling sheet plus the thickness of the protrusion. 
     
     
         7 . The heat sink of  claim 6 , wherein a width of the main body of each buckling sheet is larger than that of the extending portion of each buckling sheet. 
     
     
         8 . The heat sink of  claim 5 , wherein the main body of the buckling sheet of each first fin is located near the extending portion of the buckling hole of the first fin. 
     
     
         9 . The heat sink of  claim 1 , wherein the buckling plate is placed in an inner side of the second fin where the first flange is located. 
     
     
         10 . The heat sink of  claim 1 , wherein the second flange of the buckling plate abuts against an inner side of the first flange of the second fin. 
     
     
         11 . The heat sink of  claim 1 , wherein the buckling plate is made of metal. 
     
     
         12 . A heat sink comprising:
 a first fin, the first fin comprising a first body and a first flange bending from a side of the first body, a buckling sheet extending outwards from an outer edge of the first flange;   a second fin coupled to the first fin, the second fin comprising a second body abutting the outer edge of the first flange of the first fin and a second flange bending from a side of the second body along a direction away from the first fin, the second flange of the second fin defining a buckling hole therein receiving the bucking sheet of the first fin, and a tab extending outwards from an outer edge of the second flange of the second fin; and   a buckling plate, the buckling plate comprising a third body abutting the outer edge of the second flange of the second fin, and a third flange bending from a side of the third body to abut the second body of the second fin, the third body of the buckling plate defining a hole with the tab of the second fin engaged in the hole.   
     
     
         13 . The heat sink of  claim 12 , wherein the hole of the third body of the buckling plate is defined near the third flange, the tab of the second fin being bent to be engaged in the hole of the buckling plate to buckle the second fin with the buckling plate together. 
     
     
         14 . The heat sink of  claim 12 , wherein the first flange of the first fin defines a buckling hole therein, a protrusion protruding outwardly from an edge of the second body near the buckling hole of the second fin, the protrusion of the second fin being buckled in the buckling hole of the first fin. 
     
     
         15 . A heat sink comprising:
 a fin and a buckling plate,   the fin comprising a first body and a first flange extending from an edge of the first body towards the buckling plate,   the buckling plate comprising a second body and a second flange extending from an outer edge of the second body towards the fin,   the first body and the second body being spaced from each other, the first flange of the fin and the second flange of the buckling plate being located between the first body and the second body, a tab extending from the flange of one of the fin and the buckling plate, and the other one of the fin and the buckling plate defining a hole in which the tab is engaged.   
     
     
         16 . The heat sink of  claim 15 , wherein the first flange of the fin abuts the second body of the buckling plate, and the second flange of the buckling plate abuts the first body of the fin. 
     
     
         17 . The heat sink of  claim 16 , wherein the flanges of the fin and the buckling plate overlap each other. 
     
     
         18 . The heat sink of  claim 17 , wherein the tab extends from an outer edge of the first flange of the fin, and the hole is defined in the second body of the buckling plate, and the second flange of the buckling plate contacts an inner side of the first flange of the fin which faces the second body. 
     
     
         19 . The heat sink of  claim 15 , wherein the first flange of the fin defines a hole therein, and the heat sink further comprising another fin engaged in the hole of the fin.