Heat sink assembly

Abstract

An assembly includes a circuit board and a heat sink apparatus attached to the motherboard. The heat sink apparatus has at least two screws, and a first mistake-proof structure. A plurality of screw holes are defined in the circuit board corresponding to the screws. The circuit board has a second mistake-proof structure corresponding to the first mistake-proof structure. The first mistake-proof structure engages with the second mistake-proof structure to align the heat sink apparatus to the circuit board in only one configuration.

1 . An assembly comprising:
 a heat sink apparatus comprising at least two screws and a first mistake-proof structure; and   a circuit board comprising a second mistake-proof structure corresponding to the first mistake-proof structure, wherein at least two screw holes corresponding to the at least two screws are defined in the circuit board;   wherein the first mistake-proof structure engages with the second mistake-proof structure to align the heat sink apparatus to the circuit board.   
   
   
       2 . The assembly of  claim 1 , wherein the at least two screws comprises four screws arranged symmetrically; the first mistake-proof structure is adjacent to one of the four screws. 
   
   
       3 . The assembly of  claim 2 , wherein the heat sink apparatus has four corners; a supporting piece extends from each corner of the heat sink apparatus; each of the four screws are attached to each of the supporting pieces; the first mistake-proof structure is attached to a first of the supporting pieces. 
   
   
       4 . The assembly of  claim 3 , wherein the first mistake-proof structure is a mistake-proof member; a mounting hole is defined in the first of the supporting pieces for receiving the mistake-proof member. 
   
   
       5 . The assembly of  claim 4 , wherein the second mistake-proof structure is a mistake-proof hole defined in the circuit board for receiving the mistake-proof member. 
   
   
       6 . The assembly of  claim 4 , wherein the mistake-proof member comprises a cap resisting against a top surface of the first of the supporting pieces, and a ring resisting against a bottom surface of the first of the supporting pieces. 
   
   
       7 . The assembly of  claim 6 , wherein the cap is frustoconical shaped; a diameter of a top side of the cap is less than a diameter of a bottom side of the cap; a diameter of the mounting hole is greater than the diameter of the top side of the cap, but less than the diameter of the bottom side of the cap. 
   
   
       8 . The assembly of  claim 7 , wherein the diameter of the mounting hole is less than an outer diameter of the ring. 
   
   
       9 . The assembly of  claim 7 , wherein a groove is defined in the cap and divides the cap symmetrically. 
   
   
       10 . An assembly comprising:
 a heat sink apparatus comprising a plurality of screws arranged at corners of the heat sink apparatus and a mistake-proof member attached at one of the corners; and   a circuit board defining a plurality of screw holes corresponding to the plurality of screws and a mistake-proof hole corresponding to the mistake-proof member;   wherein the plurality of screws are capable of threadedly engaging with the plurality of screws holes only if the mistake-proof member is aligned with the mistake-proof hole, thereby preventing the heat sink apparatus to be attached to the circuit board in an incorrect configuration.   
   
   
       11 . The assembly of  claim 10 , wherein a plurality of supporting pieces extend from the corners of the heat sink apparatus; the plurality of screws are attached to the supporting pieces; the mistake-proof member is attached to a first of the supporting pieces. 
   
   
       12 . The assembly of  claim 11 , wherein a mounting hole is defined in the first of the supporting pieces for receiving the mistake-proof member. 
   
   
       13 . The assembly of  claim 12 , wherein the mistake-proof member comprises a cap resisting against a top surface of the first of the supporting pieces, and a ring resisting against a bottom surface of the first of the supporting pieces. 
   
   
       14 . The assembly of  claim 13 , wherein the cap is frustoconical shaped; a diameter of a top side of the cap is less than a diameter of a bottom side of the cap, a diameter of the mounting hole is greater than the diameter of the top side of the cap, but less than the diameter of the bottom side of the cap. 
   
   
       15 . The assembly of  claim 14 , wherein the diameter of the mounting hole is less than an outer diameter of the ring. 
   
   
       16 . The assembly of  claim 14 , wherein a groove is defined in the cap and divides the cap symmetrically.