Heat dissipation unit used in memory device

Abstract

A heat dissipation unit used in a memory device includes two heat dissipation sheets, two sides at the top edge of each heat dissipation sheet are bent for respectively forming two lugs having a height difference, and two buckle pieces having a height difference between the two lugs, wherein each lug and each buckle piece of a heat dissipating sheet is mutually stacked onto a corresponding lug and buckle piece of the other heat dissipating sheet, respectively.

What is claimed is: 
     
         1 . A heat dissipation unit used in a memory device, including:
 a first sheet dissipation sheet, two sides at the top edge of the first sheet dissipation sheet being bent for respectively forming a first lug and a second lug having a height difference relative to the first lug, and a first buckle piece and a second buckle piece having a height difference relative to the first buckle piece between the first lug and the second lug; and   a second sheet dissipation sheet, two sides at the top edge of the second sheet dissipation sheet being bent for respectively forming a third lug and a fourth lug having a height difference relative to the third lug, and a third buckle piece and a fourth buckle piece having a height difference relative to the third buckle piece between the third lug and the fourth lug;   wherein the first lug and the fourth lug are mutually stacked onto each other, the second lug and the third lug are mutually stacked onto each other, the first buckle piece and the fourth buckle piece are mutually stacked onto each other and buckled, and the second buckle piece and the third buckle piece are mutually stacked onto each other and buckled.   
     
     
         2 . The heat dissipation unit according to  claim 1 , wherein the first buckle piece is disposed close to the first lug and a height difference is formed between the first buckle piece and the first lug, the second buckle piece is disposed close to the second lug and a height difference is formed between the second buckle piece and the second lug, the third buckle piece is disposed close to the third lug and a height difference is formed between the third buckle piece and the third lug, and the fourth buckle piece is disposed close to the fourth lug and a height difference is formed between the fourth buckle piece and the fourth lug; the fourth lug is pressed on the first lug, the first buckle piece is pressed on the fourth buckle piece, the second lug is pressed on the third lug, and the third buckle piece is pressed on the second buckle piece. 
     
     
         3 . The heat dissipation unit according to  claim 1 , wherein the first buckle piece is formed with a first buckle hole, the fourth buckle piece is formed with a first buckle protrusion corresponding to the buckle hole, and the first buckle piece and the fourth buckle piece are mutually buckled through the first buckle protrusion being buckled in the first buckle hole; the third buckle piece is formed with a second buckle hole, the second buckle piece is formed with a second buckle protrusion corresponding to the second buckle hole, and the third buckle piece and the second buckle piece are mutually buckled through the second buckle protrusion being buckled in the second buckle hole. 
     
     
         4 . The heat dissipation unit according to  claim 3 , wherein the second buckle protrusion of the first heat dissipation sheet is protruded from a top surface of the second buckle piece, and the second buckle protrusion is formed as a first wedge having a large area part oriented to face towards a bending direction of the second buckle piece and a small area part; the first buckle protrusion of the second heat dissipation sheet is protruded from a top surface of the fourth buckle piece, and the first buckle protrusion is formed as another wedge oriented to face towards a bending direction of the fourth buckle piece and a small area part is. 
     
     
         5 . The heat dissipation unit according to  claim 1 , wherein a beam member is formed between the first buckle piece and the second buckle piece at the top edge of the first heat dissipation sheet; another beam member is formed between the third buckle piece and the fourth buckle piece of the second heat dissipation sheet; two beam members of the first and the second heat dissipation sheets are combined for forming a shield plate used for shielding the top edge of the first heat dissipation sheet and the top edge of the second heat dissipation sheet. 
     
     
         6 . The heat dissipation unit according to  claim 5 , wherein two sides of the beam member of the first heat dissipation sheet are respectively spaced from the first buckle piece and the second buckle piece at an interval; two sides of the beam member of the second heat dissipation sheet are respectively spaced from the third buckle piece and the fourth buckle piece at an interval. 
     
     
         7 . The heat dissipation unit according to  claim 1 , wherein the first heat dissipation sheet is further formed with at least two rows of heat dissipation holes staggeringly arranged, and the second heat dissipation sheet is further formed with at least two rows of another heat dissipation holes staggeringly arranged. 
     
     
         8 . The heat dissipation unit according to  claim 7 , wherein the first heat dissipation sheet is formed with a first fitting surface on which a first heat conductive medium is provided; the second heat dissipation sheet is formed with a second fitting surface on which a second heat conductive medium is provided. 
     
     
         9 . The heat dissipation unit according to  claim 8 , wherein the at least two rows of heat dissipation holes of the first heat dissipation sheet are arranged between the location where the first heat conductive medium being provided and the top edge of the first heat dissipation sheet;
 the at least two rows of heat dissipation holes of the second heat dissipation sheet are arranged between the location where the second heat conductive medium being provided and the top edge of the second heat dissipation sheet.   
     
     
         10 . The heat dissipation unit according to  claim 1 , wherein the first heat dissipation sheet is formed with a first fitting surface facing a first direction, and the second heat dissipation sheet is formed with a second fitting surface facing a second direction opposite to the first direction; the first lug, the second lug, the first buckle piece and the second buckle piece of the first heat dissipation sheet are all protruded towards the first fitting surface in the same direction; the third lug, the fourth lug, the third buckle piece and the fourth buckle piece of the second heat dissipation sheet are all protruded towards the second fitting surface in the same direction; the first buckle hole of the first buckle piece is formed with a first buckle inner flange, the second buckle hole of the third buckle piece is formed with a second buckle inner flange; the second buckle protrusion of the second buckle piece is formed with a small area part corresponding to the first buckle inner flange thereby being enabled to be abutted with each other; the first buckle protrusion of the fourth buckle piece is formed with another small area part corresponding to the second buckle inner flange thereby being enabled to be abutted with each other.