CN103889189B - Heat sink assembly structure - Google Patents

Abstract

The invention discloses a radiator combination structure, which is characterized in that a plurality of radiating fins are inserted into a radiating base at intervals, the bottom end of each radiating fin at least partially extends downwards to form a plug sheet body, the radiating base is provided with a plurality of slots which penetrate through the radiating fins up and down relative to the plug sheet body, the plug sheet body of each radiating fin respectively penetrates through the opposite slots of the radiating base downwards, and the bottom of the plug sheet body of each radiating fin or the top or the bottom of each opposite slot is punched to jointly form a fixed positioning structure, thereby achieving the effect of firm and tight positioning, further enhancing the function of conduction and radiation, and facilitating the manufacture, processing and mass production.

Description

Combination structure of radiator

technical field

The invention relates to a combined structure of a heat sink, in particular to a heat sink on which a plurality of heat dissipation fins are penetrated, inserted and stamped.

Background technique

The heat sinks used in traditional electronic and electrical products use aluminum as the base material of the bottom plate, and the bottom plate of the heat sink is made by extrusion, forging or cutting, and finally the cooling fins are fixed on the bottom plate by welding. Since the soldering materials used for soldering will increase the heat transfer resistance between the bottom plate and the cooling fins, which will affect the overall heat dissipation performance of the radiator, and the soldering materials have lead (Pb) components that pollute the environment, they have gradually been banned. . In addition, due to the continuous improvement of the computing speed of the chip, it is expected that when the computing speed of the chip reaches 3.0 GHz, it is bound to require a base material with better heat dissipation performance and a more effective way to make a radiator. Among them, the radiator made of pure copper or copper alloy will be become the mainstream product in the future.

At present, the heat sink 100 can also be made by die forging. As shown in FIG. 1 and FIG. The reflexed portion 122 is embedded in the groove 112 of the bottom plate 110 . As shown in the figure, firstly, the folded portions 122 of the heat dissipation fins 120 are respectively arranged on the grooves 112 of the bottom plate 110. Since the width of the folded portions 122 of the heat dissipation fins 120 is slightly smaller than the width of the grooves 112, the heat dissipation fins The reflexed portion 122 of the sheet 120 cannot be directly embedded and fixed in the groove 112, but must be placed between two adjacent heat dissipation fins 120 by means of an extruding tool (not shown in the figure) to stamp the bottom plate 110 downward. The surface is extruded to form the groove ridge 114, and the groove ridge 114 is pressed to produce plastic deformation, and is pushed outward to the groove 112 by both sides of the tool, so the adjacent groove 112 is pushed, so that the heat dissipation fin 120 reverses The folding portion 122 is embedded in the groove 112 .

Existing die forging is used to manufacture the heat sink 100 to improve the heat conduction performance between the heat dissipation fins 120 and the bottom plate 110 . However, it is worth noting that when the tool squeezes the land 114 with a greater external force and increases the plastic deformation of the land 114, the squeezed land 114 only pushes against the upper opening of the groove 112 to clamp The reflexed portion 122 of the heat sink 120 is only; other than that, there is no mandatory fixed bonding force in the up and down direction, so as to affect the clamping positioning strength and heat conduction effect of the bottom plate 110 of the heat sink 100 and each heat sink 120 .

Contents of the invention

The purpose of the present invention (i.e. the technical problem to be solved) is that the bottom of the plug-in body of each cooling fin or the top or bottom of each opposite slot of the cooling base can be stamped directly to form a consolidated joint together. The positioning structure enables firm and tight positioning, improves the performance of conduction and heat dissipation, and facilitates manufacturing, processing and mass production.

In order to achieve the above-mentioned purpose, the heat sink of the present invention has a plurality of heat dissipation fins interposed at intervals on the heat dissipation base, and the bottom end of each heat dissipation fin partially extends downwards at least one plug-in piece body, and the heat dissipation base is opposite to each heat dissipation fin. The plug-in body of the fin is provided with a plurality of slots that penetrate up and down, and the plug-in body of each heat dissipation fin runs through the relative slots of the heat dissipation base respectively downwards. The slot is provided with a fixed positioning structure, and the bottom end of each heat dissipation fin leans against the heat dissipation base.

In a preferred embodiment, the bottom of the plug-in body of the plurality of cooling fins and the bottom of the corresponding slot are provided with a fixed positioning structure.

In a preferred embodiment, a plurality of inserting pieces extend downward at intervals from the bottom ends of the plurality of cooling fins. groove.

In a preferred embodiment, the bottom of each slot of the heat dissipation base is respectively provided with an enlarged opening, and the bottom of the inserting body of a plurality of heat dissipation fins is set as an enlarged head corresponding to the enlarged opening of each slot to jointly form a Fixed positioning structure.

In a preferred embodiment, the bottom of the heat dissipation base is provided with stamping recesses around each slot, and each stamping recess has an inner peripheral extrusion portion to press inwardly the plug-in body combined with the opposite heat dissipation fin perimeter.

Further, the bottom of the heat dissipation base and the bottom of the plug-in body of each heat dissipation fin are set to have the same bottom surface.

In a preferred embodiment, the top of the heat dissipation base is provided with stamping recesses on both sides of each slot, and each stamping recess has an inner extrusion part to press inwardly and combine with the inserting sheet body of the opposite heat dissipation fin. side.

Therefore, the combined structure of the radiator of the present invention is formed by stamping the bottom of the plug-in body of each cooling fin or the top or bottom of each relative slot to jointly form a fixed positioning structure to achieve a firm and tight positioning effect and further enhance Conduction heat dissipation function, and convenient production, processing and mass production.

Description of drawings

Fig. 1 is a three-dimensional exploded view of an existing radiator before stamping assembly;

Fig. 2 is a schematic diagram of the stamping combined structure of the existing radiator;

Fig. 3 is a perspective view of the combined structure of a radiator according to a preferred embodiment of the present invention;

Fig. 4 is a perspective view of another angle of view of the radiator of Fig. 3;

Fig. 5 is an exploded view of the heat dissipation base and heat dissipation fins in Fig. 3 before stamping;

Fig. 6 is an exploded view of another perspective of Fig. 5;

Fig. 7 is an exploded view of the heat dissipation base, heat dissipation fins and jig in Fig. 5;

Fig. 8 is a schematic diagram of continuing Fig. 7 and preparing for stamping;

Fig. 9 is a schematic diagram of completing the stamping action following Fig. 8;

Fig. 10 is a perspective view of another preferred embodiment of the radiator assembly structure of the present invention;

Fig. 11 is an exploded view of the heat dissipation base and heat dissipation fins in Fig. 10 before stamping;

Fig. 12 is an exploded view of the heat dissipation base, heat dissipation fins and jig of Fig. 11;

Fig. 13 is a schematic diagram of continuing Fig. 12 and preparing for stamping;

Fig. 14 is the schematic diagram of Fig. 13 punch;

Fig. 15 is a schematic diagram of completing the stamping action following Fig. 13;

Fig. 16 is a sectional view of Fig. 15 along the section line A~A;

Fig. 17 is a perspective view of another preferred embodiment of the radiator assembly structure of the present invention;

Fig. 18 is a cross-sectional view of the combined structure of the radiator in Fig. 17 .

[Description of main component symbols]

(current technology)

100, radiator 110, bottom plate

112. groove 114. land

120, cooling fins 122, reflexed part

(this invention)

10. Radiator 1. Radiator base

11. Metal seat body 12. Slot

13. Top 14. Bottom

15. Enlarging mouth 16. Stamping recess

17. Inner peripheral extruded part 18. Stamped concave part

19. Inner extrusion part

2. Heat dissipation fins 21. Metal sheet body

22. Plug body 23. Enlarged head

3. Fixture 31. Bottom plate

32. Groove 33. Punch

34. Stamping end.

detailed description

Relevant present invention is to achieve above-mentioned purpose, adopts technical means and effect thereof, enumerates feasible embodiment hereby, and cooperates accompanying drawing to illustrate as follows:

First, please refer to the preferred embodiments shown in FIGS. 3 to 6 . It can be clearly seen from the figures that the heat sink 10 of the present invention is mainly used in electronic and electrical products for heat dissipation. The radiator 10 of the present invention is assembled and fixed with a plurality of heat dissipation fins 2 on the heat dissipation base 1, and the heat dissipation base 1 and the heat dissipation fins 2 can be selected from aluminum, aluminum alloy, copper, copper alloy, silver alloy, etc. Material.

3 to 9, the rectangular metal base 11 of the heat dissipation base 1 of the present invention has a top 13 and an opposite bottom 14, and a plurality of heat dissipation fins 2 are interposed on the metal base 11, each The bottom end of the rectangular metal sheet body 21 of the heat dissipation fin 2 extends at least one plug-in sheet body 22 downward, and the heat dissipation base 1 is provided with a plurality of plug-in sheet bodies 22 penetrating up and down with respect to each heat dissipation fin 2 . Groove 12, as shown in the figure, a plurality of rectangular plug-in pieces 22 extending downward at intervals from the bottom ends of a plurality of cooling fins 2 , and the heat-dissipating base 1 is opposite to each plug-in piece body of each cooling fin 2 . 22 is provided with a plurality of rectangular slots 12 that penetrate up and down; the plug-in pieces 22 of each heat dissipation fin 2 are respectively downwardly penetrated into the relative slots 12 of the heat dissipation base 1, so that the insertion of each heat dissipation fin 2 The bottom of the sheet body 22 or the top or bottom opposite to the slot 12 is provided with a fixed positioning structure, and the bottom ends of the heat dissipation fins 2 abut against the heat dissipation base 1 .

During the actual assembly process of the radiator 10 of the present invention, as shown in Fig. 6, Fig. 7 and Fig. 8, the top of each heat dissipation fin 2 is inserted into the relative slot 32 of the fixture 3 to be positioned on the bottom plate 31. Then the slots 12 of the heat dissipation base 1 are socketed on the plug bodies 22 of the heat dissipation fins 2 , and the bottoms of the slots 12 of the heat dissipation base 1 are respectively provided with enlarged openings 15 . At this time, use the punch 33 to punch down the inserting sheet body 22 of each cooling fin 2, as shown in Figure 3 and Figure 9, so that the bottom of the connecting sheet body 22 of a plurality of cooling fins 2 corresponds to each slot The enlarged opening 15 of 12 is set as an enlarged head 23 to jointly form a fixed positioning structure, so that the bottom ends of each heat dissipation fin 2 are firmly attached to the top 13 of the heat dissipation base 1, and the bottom 14 of the heat dissipation base 1 The bottom surface of the plug-in body 22 of each heat dissipation fin 2 may be flush with the bottom surface.

Please refer to another preferred embodiment shown in Fig. 10 to Fig. 16, this radiator 10 is also provided with a fixed positioning structure at the bottom of the plug body 22 of each heat dissipation fin 2 and the bottom of the relative slot 12, as shown in Fig. 13 to FIG. 16 , the bottom 14 of the heat dissipation base 1 is punched downward by the stamping end 34 of the punch 33, so that the bottom 14 forms a stamping recess 16 around each slot 12, and each stamping recess 16 has an inner peripheral edge. The pressure portion 17 is pressed inwardly and combined with the peripheral edge of the inserting sheet body 22 of the opposite heat dissipation fin 2 to form a fixed positioning structure, so that the bottom end of each heat dissipation fin 2 is firmly attached to the heat dissipation base 1, Moreover, the bottom 14 of the heat dissipation base 1 and the bottoms of the plug-in pieces 22 of the heat dissipation fins 2 can form the same bottom surface.

Please refer to another preferred embodiment shown in FIG. 17 and FIG. 18. This radiator 10 also provides a fixed positioning structure for the plug body 22 of each heat dissipation fin 2 and the relative slot 12. This embodiment also By means of stamping, the top 13 of the heat dissipation base 1 is provided with a stamped concave portion 18 on both sides of each slot 12, and each stamped concave portion 18 has an inner extrusion portion 19 to press inwardly and combine with the corresponding heat dissipation fin 2. Insert the opposite side of the sheet body 22 to form a fixed positioning structure, so that the bottom ends of the heat dissipation fins 2 are firmly attached to the heat dissipation base 1, and the bottom 14 of the heat dissipation base 1 is connected to the insertion of each heat dissipation fin 2. Bottoms of the tabs 22 can be aligned with bottom surfaces.

The above-mentioned embodiments are only used to illustrate the present invention for convenience, and are not intended to be limiting. Without departing from the scope of the present invention, various simple changes and modifications that can be made by those skilled in the art should still be included in the rights. within the required range.

Claims (8)

1. A combination structure of a heat sink, a plurality of heat dissipation fins are inserted at intervals on the heat dissipation base, and the bottom end of each heat dissipation fin partially extends downwards at least one plug-in piece body, the heat dissipation base is opposite to each heat dissipation fin The plug-in body of the fin is provided with a plurality of slots that penetrate up and down, and the plug-in body of each heat dissipation fin runs through the relative slots of the heat dissipation base respectively downwards. The slot is provided with a fixed positioning structure, and the bottom end of each cooling fin leans against the heat dissipation base, wherein the fixed positioning structure includes that the top of the heat dissipation base is provided with a stamping recess on both sides of each slot, Each stamped concave part has an inner extruded part for inwardly extruded and combined with the opposite side of the inserting sheet body of the opposite heat dissipation fin. 2 . The combined structure of the heat sink according to claim 1 , wherein the bottoms of the inserting fins and the bottoms of the corresponding slots of the plurality of heat dissipation fins are provided with fixing and positioning structures. 3 . 3. The combined structure of the heat sink according to claim 2, wherein the bottom ends of the plurality of heat dissipation fins extend downward at intervals, and a plurality of inserting fins extend downward, and the heat dissipation base is opposite to the inserting fins of each heat dissipation fin. The body is provided with a plurality of slots penetrating up and down. 4. The heat sink combination structure according to claim 2, wherein the bottom of each slot of the heat dissipation base is respectively provided with an enlarged opening, and the bottom of the plug-in body of a plurality of heat dissipation fins is provided corresponding to the enlarged opening of each slot. To enlarge the head to jointly form a fixed positioning structure. 5. The combined structure of the heat sink according to claim 2, wherein the bottom of the heat dissipation base is respectively provided with stamping recesses around each slot, and each stamping recess has an inner peripheral extrusion part to be pressed inwardly and combined with the opposite The peripheral edge of the plug body of the cooling fin. 6 . The combined structure of the heat sink according to claim 4 or 5 , wherein the bottom of the heat dissipation base and the bottom of the plug-in body of each heat dissipation fin are set as bottom surfaces that are aligned with each other. 7 . 7. The combined structure of the heat sink according to claim 1, wherein the bottom ends of the plurality of cooling fins extend downward at intervals, and a plurality of plug-in pieces extend downward, and the heat-dissipating base is opposite to the plug-in pieces of each cooling fin. The body is provided with a plurality of slots that penetrate up and down. 8 . The combined structure of the heat sink according to claim 7 , wherein the bottom of the heat dissipation base and the bottom of the plug-in body of each heat dissipation fin are set as bottom surfaces that are aligned with each other.