JP3159948U - Radiator - Google Patents

Abstract

An object of the present invention is to provide a heat radiator that can improve the heat radiation efficiency, has a small number of parts, and has a simple structure and is inexpensive. A radiator 1A covers a support substrate 10A, a radiation fin 20A erected on an upper surface portion 11 of the support substrate 10A, and one and other side surfaces of a radiating fin 20A erected on the upper surface portion 11. A wind tunnel 30A having side walls 31, 31 and an upper wall 32A extending over the upper ends of the side walls 31, 31 and covering the upper side of the radiation fins 20A, and an upper wall 32A of the wind tunnel 30A A heat radiator that radiates heat by supplying the wind supplied from the blower F between the heat radiating fins 20A through the window portion 32Aa formed in the support board 10A. A wind tunnel fixing groove for fixing the wind tunnel 30 </ b> A is recessed outside the position in the width direction, and the wind tunnel 30 </ b> A is fitted and fixed to the wind tunnel fixing groove by the lower end portion of the side wall portion 31. [Selection] Figure 1

Description

  The present invention is a radiator used for cooling components (hereinafter, also referred to as “heat generating components”), such as transistors, LSIs, microprocessors, etc., and in particular, a radiator having a radiation fin. About.

  2. Description of the Related Art As a conventional heat radiator, a heat radiator is known that includes a support substrate and a plurality of thin plate-like heat radiation fins that are erected at a predetermined interval on one surface side of the support substrate. According to this heat radiator, heat generated from the heat radiation component brought into contact with the other surface side of the support substrate is transmitted to the support substrate and the plurality of heat radiation fins, and is radiated into the air.

  In order to improve the heat dissipation efficiency of such a heatsink, a blower such as a blower fan is provided close to the heatsink, and air is supplied between the plurality of heatsink fins by supplying air between the heatsink fins. A method is used to eliminate the air accumulated in the air.

  At this time, in order to supply wind more efficiently between a plurality of heat dissipating fins, there is a heat radiator provided with a wind tunnel. For example, Patent Document 1 discloses that a wind tunnel cover is provided outside the radiator and a fan that generates cooling air is provided inside the wind tunnel cover so that the cooling air does not leak outside the wind tunnel cover. Yes.

Further, FIG. 11 shows an example of a conventional radiator having a wind tunnel.
As shown in FIG. 11, the conventional radiator 100 includes a support substrate 110, a plurality of thin plate-shaped radiation fins 120 erected on the one surface portion 111 of the support substrate 110 at a predetermined interval, and side surfaces of the radiation fins 120. A wind tunnel 130 having a substantially U-shaped cross-sectional view, which is provided so as to cover the upper side and is attached to the side surface portion 113 of the support substrate 110 via the attachment member 140 by the lower end portion thereof. The heat generating component H is brought into contact with the other surface portion 112 of the support substrate 110.

Japanese Patent Laid-Open No. 2002-280779

By the way, in the field of radiators, improving the heat radiation efficiency is an important issue.
Therefore, if not only the heat radiating fins but also the wind tunnel can be used as a heat radiating member, it can be said that improvement in heat radiating efficiency can be expected.
In addition, it is required to reduce the manufacturing cost of the radiator as much as possible. For this reason, reduction of the number of manufacturing processes, reduction of the number of parts, saving of equipment costs, etc. are important issues.

However, in the conventional radiator 100, the wind tunnel 130 is attached to the side surface portion 113 of the support substrate 110. Since the side surface portion 113 of the support substrate 110 is far from the heat generation source (heat generation component) H, heat is not easily transmitted. The heat from the heat generating component H was not easily transmitted to the wind tunnel 130. For this reason, the wind tunnel 130 could not function as a heat radiating member.
In addition, when attaching the wind tunnel 130 to the support substrate 110, it is necessary to use an attachment member 140 such as a screw or a rivet, which increases the number of parts and increases the manufacturing cost.

  Therefore, an object of the present invention is to provide a heat radiator that can improve the heat radiation efficiency, has a small number of parts, and has a simple structure and is inexpensive.

  A radiator according to claim 1 that has solved the above-described problem is a support substrate, a radiation fin that is a thin metal plate that is erected on one surface portion of the support substrate, and a radiation fin that is erected on the one surface portion. A wind tunnel made of a thin metal plate having a side wall portion covering at least one side surface and an upper wall portion covering the upper side of the radiating fin extending on the side wall portion, Is provided, and the support substrate has a recessed air channel fixing groove for fixing the air channel outside the fixing position of the heat radiating fin on the one surface portion in the width direction. The wind tunnel is fitted and fixed to the wind tunnel fixing groove by a lower end portion of the side wall portion.

According to such a configuration, by providing a wind tunnel in the radiator so as to cover at least one side surface and the upper side of the radiating fin, the wind is improved between the radiating fins erected on the one surface portion of the support substrate. Can be supplied.
By fitting and fixing this wind tunnel in a wind tunnel fixing groove that is recessed in one surface portion of the support substrate, the heat generated by the heat generating component can be transmitted well not only to the heat radiating fins but also to the wind tunnel. For this reason, it is possible to dissipate heat generated by the heat generating component by the wind tunnel. Thereby, the thermal radiation efficiency of a heat radiator can be improved. Further, since the wind tunnel is fitted and fixed in a wind tunnel fixing groove that is recessed in one surface portion of the support substrate, the wind tunnel can be firmly fixed to the support substrate without using components such as attachment members. For this reason, the number of parts can be reduced, the configuration becomes simple, and the heat radiator becomes inexpensive.

  The radiator according to claim 2 is the radiator according to claim 1, wherein the side wall portion of the wind tunnel has the lower end portion folded back to the upper end portion side, and the thickness dimension of the folded portion is the plate thickness. A folded portion having a thickness that is at least twice as large as the depth dimension of the wind tunnel fixing groove and a width dimension equal to or slightly smaller than the width dimension of the wind tunnel fixing groove. And the fixed portion occupying the majority of the folded portion is fitted and fixed in the wind tunnel fixing groove.

  According to this configuration, the degree of adhesion between the fixed portion and the side wall portions of the wind tunnel fixing groove is obtained by having the folded portion in the wind tunnel and fitting and fixing the fixed portion occupying the majority of the folded portion in the wind tunnel fixing groove. Can be improved. Thereby, the heat conductivity between a wind tunnel and a support substrate can be improved, and by extension, the heat dissipation efficiency of a heat sink can be improved.

Here, the folded portion is formed so that the width dimension is equal to or slightly smaller than the width dimension of the wind tunnel fixing groove, so that when the fixed portion is press-fitted into the wind tunnel fixing groove, the fixed portion is slightly in the wind tunnel fixing groove. Springback is performed to press the entire side walls of the wind tunnel fixing groove. Thereby, a to-be-fixed part can be closely_contact | adhered by a groove | channel both-side wall part, and it can prevent that a clearance gap produces between a groove | channel both-side wall part and a to-be-fixed part. For this reason, the adhesion degree and fixing strength between the wind tunnel and the support substrate can be further improved. Further, since the folding height of the folded part is larger than the depth of the wind tunnel fixing groove, when the fixed part is fitted into the wind tunnel fixing groove, a part of the folded part protrudes upward from the surface of the wind tunnel fixing groove. Will do. For this reason, even if, for example, a pressing force or vibration in the groove width direction acts on the wind tunnel, the protruding part of the folded portion and the side wall portion of the wind tunnel can support each other in the wind tunnel fixing groove. The uprightness of the wind tunnel can be ensured. Thereby, it is possible to prevent the wind tunnel from being damaged due to vibration during transportation or use.
Furthermore, since the folded portion has a thickness that is twice or more the plate thickness, the wind tunnel can be easily and stably fixed to the support substrate even when the wind tunnel is thinned.

  A radiator according to a third aspect is the heat radiator according to the second aspect, wherein the support substrate is recessed in a width direction outside of the wind tunnel fixing groove in parallel with the wind tunnel fixing groove, and has a depth dimension. A concave caulking groove portion formed below the depth of the wind tunnel fixing groove, and the fixed portion is sandwiched by a pressing force generated on both side walls of the wind tunnel fixing groove due to the formation of the caulking groove portion. And is fixed by caulking.

  According to such a configuration, by forming the caulking groove portion outside the wind tunnel fixing groove, the fixed portion of the wind tunnel fitted in the wind tunnel fixing groove is sandwiched from both sides by the entire side wall portions of the wind tunnel fixing groove. Since the caulking is fixed, the wind tunnel can be firmly fixed by the support substrate, and the wind tunnel can be prevented from falling off the support substrate.

  According to a fourth aspect of the present invention, in the radiator according to the first to third aspects, the wind tunnel has a notch portion serving as a supply passage for supplying the wind between the heat radiating fins to the upper wall portion. Is formed.

  According to this, when the blower is provided on the upper surface side of the radiator, it is possible to reliably and satisfactorily distribute the entire radiating fins erected on the support substrate via the supply passage.

  The radiator according to claim 5 is the radiator according to claims 1 to 3, wherein the wind tunnel is continuous with an end surface of the upper wall portion and provided in a direction orthogonal to the side wall portion. An end wall portion that covers the end surface side of the fin is further provided, and a notch portion serving as a supply passage for supplying the wind between the radiating fins is formed in the end wall portion.

  According to this, when the blower is provided on the end face side of the radiator, the wind can be surely and satisfactorily distributed by the entirety of the radiating fins erected on the support substrate via the supply passage.

  According to the radiator of the present invention, the heat generated in the heat generating component can be radiated into the air even by the wind tunnel, so that the heat radiation efficiency of the radiator can be significantly improved. In addition, since the wind tunnel can be attached to the support substrate without using an attachment member, the number of parts can be reduced, the configuration is simplified, and the radiator is inexpensive.

It is a perspective view which shows the whole structure of the heat radiator which concerns on 1st embodiment of this invention. (A) is the front view which looked at the heat radiator shown in FIG. 1 from the one side of the depth length direction, (b) is the elements on larger scale of (a). In the radiator which concerns on 1st embodiment of this invention, it is a figure for demonstrating a mode that a radiation fin is fixed to a support substrate. (A) is a figure which shows a mode that a wind tunnel is formed in the heat radiator which concerns on 1st embodiment of this invention, (b) is other than the wind tunnel which concerns on the heat radiator of 1st embodiment of this invention. It is a figure which shows a mode that this structure and a wind tunnel are formed. (A) is the front view which looked at the heat radiator which concerns on the 1st modification of 1st embodiment of this invention from the one side of the depth length direction, (b) is 1st embodiment of this invention. It is the front view which looked at the heat radiator which concerns on the 2nd modification of this from the one side of the depth length direction. (A) is the front view which looked at one part of the heat radiator which concerns on 2nd embodiment of this invention from the one side of the depth length direction, (b) is 1st of 2nd embodiment of this invention. It is the front view which looked at one part of the heat radiator which concerns on this from the one side of the depth length direction. (A) is the front view which looked at some radiators which concern on the 2nd modification of 2nd embodiment of this invention from the one side of the depth length direction, (b) is the 1st of this invention. It is the front view which looked at one part of the heat radiator which concerns on the 3rd modification of 2 embodiment from the one side of the depth length direction. It is the front view which looked at the heat radiator which concerns on 3rd embodiment of this invention from the one side of the depth length direction. In the heat radiator which concerns on 3rd embodiment of this invention, it is a figure for demonstrating a mode that a radiation fin is fixed to a support substrate, and a mode that a wind tunnel is fixed to a support substrate. It is the front view which looked at the heat radiator which concerns on 4th embodiment of this invention from the one side of the depth length direction. It is the front view which looked at the conventional heat radiator from the one side of the depth length direction.

<First embodiment>
Next, a radiator according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the following description, the vertical and horizontal directions are the same as the direction of the paper. In addition, the width direction shall show the left-right direction. Further, in the following description, the “cross section” refers to a cross section when the front view is cut in the vertical direction.

  As shown in FIGS. 1 and 2, a radiator 1A according to the first embodiment includes a support substrate 10A, a radiation fin 20A standing on the support substrate 10A, and a wind tunnel 30A covering a part of the radiation fin 20A. , And is configured.

  The support substrate 10A serves as a base of the radiator 1A, is a metal rectangular member formed with a predetermined thickness, and includes fin fixing grooves 13A that are previously recessed in the upper surface portion 11 and fins. Caulking groove portions 15 provided on the upper surface portion 11 on both sides of the fixing groove 13A, wind tunnel fixing grooves 14 and 14 recessed outwardly from the outermost caulking groove portions 15 and 15 in the width direction of the upper surface portion 11, and wind tunnel fixing There are caulking groove portions 16, 16 provided on the upper surface portions 11, 11 outside the grooves 14, 14. As shown in FIG. 2A, a heat generating component H such as a semiconductor element is brought into contact with the lower surface portion 12 of the support substrate 10A. Further, the length dimension L1 and the width dimension W1 (see FIG. 1) of the support substrate 10A can be appropriately set according to the heat generating component in which the radiator 1A is used.

  The fin fixing groove 13A includes left and right side wall portions 13Aa and 13Aa that respectively fall from the upper surface portion 11 at a predetermined interval, and a bottom portion 13Ab disposed between the side wall portions 13Aa and 13Aa. The bottom portion 13Ab is formed at a constant depth along the length L1 (see FIG. 1) of the support substrate 10A and substantially parallel to the upper surface portion 11. In the present embodiment, the shape of the bottom portion 13Ab is formed in an arc shape, and the entire fin fixing groove 13A is substantially U-shaped in sectional view.

  As shown in FIG. 2B, the fin fixing groove 13A has a width dimension W2 that is substantially the same as or slightly larger than the thickness dimension T2 of the folded portion 20A1 of the radiating fin 20A. Further, the fin fixing groove 13A has a depth dimension D1 that is smaller than the height dimension H1 of the folded portion 20A1 of the radiating fin 20A and substantially the same dimension as the height dimension H2 of the fixed portion 20A2. Yes.

  The wind tunnel fixing groove 14 includes left and right side wall portions 14a and 14a that respectively fall from the upper surface portion 11 at a predetermined interval, and a bottom portion 14b disposed between the side wall portions 14a and 14a. The bottom portion 14b is formed in a certain depth along the length L1 direction of the support substrate 10A and substantially parallel to the upper surface portion 11. In this embodiment, the shape of the bottom part 14b is formed in circular arc shape, and the whole wind-tunnel fixing groove 14 becomes a substantially U shape in a cross-sectional view.

  The width dimension W3 of the wind tunnel fixing groove 14 is substantially the same as or slightly larger than the thickness dimension T4 of the folded portion 33 of the wind tunnel 30A. Further, the depth dimension D2 of the wind tunnel fixing groove 14 is smaller than the height dimension H3 of the folded portion 33 of the wind tunnel 30A and is substantially the same as the height dimension H4 of the fixed portion 33a. .

  The caulking groove portion 15 is a groove that is pressed against the upper surface portions 11 on both sides of the fin fixing groove 13A, and is formed in a substantially V shape in cross section here. The caulking groove 15 preferably has a depth dimension D3 of 1/8 or more and 1 or less when the depth dimension D1 of the fin fixing groove 13A is 1. If it is this range, the pressing force by formation of the crimping groove part 15 can fully be transmitted to the whole side wall part 13Aa of the fin fixing groove 13A, 13Aa.

  The caulking groove portion 16 is a groove formed by being pressed against the upper surface portion 11 on the outer side of the wind tunnel fixing groove 14, and is formed in a substantially V shape in sectional view here. The caulking groove portion 16 preferably has a depth dimension D4 (see FIG. 2B) of 1/8 or more and 1 or less when the depth dimension D2 of the wind tunnel fixing groove 14 is 1. If it is this range, the pressing force by formation of the caulking groove part 16 can fully be transmitted to the whole side wall part 14a of the wind tunnel fixing groove 14, 14a.

  Such a supporting substrate 10A is formed by, for example, extruding a metal plate made of a material having high thermal conductivity such as copper, copper alloy, aluminum, or aluminum alloy, so that the upper surface portion 11 (one surface portion) has fins. A plurality of fixing grooves 13A are provided at predetermined intervals, and the wind tunnel fixing grooves 14 are provided in the vicinity of both end portions in the width direction of the fin fixing grooves 13A, and are cut into a desired length. . The dimensions of the fin fixing groove 13A and the wind tunnel fixing groove 14 can be adjusted as appropriate.

The heat radiating fin 20A is a rectangular thin plate member made of a material having high thermal conductivity such as copper, copper alloy, aluminum, or aluminum alloy, and its lower end 20Ab (one end) extends over the entire length. It has a folded portion 20A1 that is folded back by a predetermined amount toward the portion 20Aa (the other end portion).
The folded portion 20A1 has a thickness dimension T2 that is substantially twice the plate thickness T1. Note that the bent portion to which the bending stress is most applied at the time of folding slightly bulges outward in the width direction due to the rigidity of the metal thin plate.

  Further, the folded portion 20A1 is formed such that its height dimension H1 is larger than the depth dimension D1 of the fin fixing groove 13A, and the fixed parts 20A2 occupying the majority are upper surface portions on both sides of the fin fixing groove 13A. 11 is crimped and fixed to the fin fixing groove 13A by forming the crimping groove portion 15 formed by crushing. That is, the height dimension H2 of the fixed portion 20A2 is substantially the same as the depth dimension D1 of the fin fixing groove 13A. Further, the portion 20A3 of the folded portion 20A1 excluding the fixed portion 20A2 is in a state of protruding upward from the upper surface portion 11 where the opening of the fin fixing groove 13A is formed.

The heat dissipating fin 20A configured as described above can be formed by bending the lower end portion of the thin metal plate by press working or the like to form the folded portion 20A1, and cutting it according to the formation size of the support substrate 10A.
If the radiation fin 20A is formed with a thickness dimension of, for example, about 0.5 to 0.6 mm, the radiation fin 20A can be thinned. Further, with this thickness, the folded portion 20A1 can be easily formed, and an appropriate springback effect can be obtained when the fixed portion 20A2 is fitted into the fin fixing groove 13A, and the side wall portion 13Aa of the fin fixing groove 13A, The fixed portion 20A2 can be more closely attached to 13Aa.

  The wind tunnel 30A is provided so as to cover the heat radiating fins 20A and is a thin metal plate made of a material having high thermal conductivity such as copper, copper alloy, aluminum, or aluminum alloy. Side wall portions 31 and 31 erected on the upper surface portion 11 and upper end portions of the side wall portions 31 and 31 are provided substantially parallel to the upper surface portion 11 of the support substrate 10A above the radiation fins 20A. An upper wall portion 32A, and is substantially U-shaped in cross-sectional view.

  The side wall portions 31 and 31 cover the side surfaces of the heat radiating fins 20A, are fixed to the support substrate 10A, and in the state of being fixed to the support substrate 10A, the height is fixed to the support substrate 10A. It is larger than the height of the fin 20A. In addition, when not distinguishing the side wall part 31 of one side and the side wall part 31 of the other side of 30 A of wind tunnels, it describes with the side wall part 31. FIG.

  Here, the side wall portion 31 has a folded portion 33 that is folded by a predetermined amount outwardly toward the upper end portion 31 a over the entire length direction of the lower end portion 31 b, and is fixed to occupy a majority of the folded portion 33. The portion 33 a is fitted and fixed to the wind tunnel fixing groove 14.

  The folded portion 33 has a thickness dimension T4 that is approximately twice the plate thickness T3. Note that the bent portion to which the bending stress is most applied at the time of folding slightly bulges outward in the width direction due to the rigidity of the metal thin plate.

  Further, the folded portion 33 is formed such that the height dimension H3 is larger than the depth dimension D2 of the wind tunnel fixing groove 14, and the fixed portion 33a occupying the majority is crimped on the upper surface portion 11. Due to the formation of the groove 16, it is caulked and fixed to the wind tunnel fixing groove 14. That is, the height dimension H4 of the fixed portion 33a is substantially the same as the depth dimension D2 of the wind tunnel fixing groove 14. Moreover, the part 33b except the to-be-fixed part 33a is the state which protruded upwards from the opening part of the wind tunnel fixing groove 14 among the folding | returning parts 33. FIG.

  The folded portion 33 preferably has a height dimension H3 of 5/4 or more and 2 or less when the depth dimension D2 of the wind tunnel fixing groove 14 is 1. Within this range, the folded portion 33 can be easily formed, and the formation of the caulking groove portion 16 can favorably apply the pressing force to the side walls 14a and 14a of the wind tunnel fixing groove 14 to be described later. .

  The upper wall portion 32A covers the upper side of the heat radiating fin 20A. Here, the upper wall portion 32A is a flat plate portion extending substantially parallel to the upper surface portion 11 of the support substrate 10A, and one side surface and the other side surface are the side wall portion 31, respectively. 31 is continuous with the upper end portions 31a and 31a. Here, the upper wall 32A is formed with a window 32Aa.

  As shown in FIG. 1 again, the window portion 32Aa serves as a supply passage for supplying the air from the blower F indicated by the broken line between the heat radiating fins 20A, and a part of the upper wall portion 32A is cut away. Is formed. Note that the window portion 32Aa only needs to be able to sufficiently guide the wind from the blower F between the heat dissipating fins 20A provided below, and the formation position, shape, and size thereof are the installation position, shape, and size of the blower F. It can be changed as appropriate according to the situation. For example, in FIG. 1, the window portion 32 </ b> Aa is illustrated larger than the blower F, but the size may be such that the surface of the window portion 32 </ b> Aa is covered by the blower F.

  The wind tunnel 30A configured in this way can be formed as follows, for example. That is, as shown in FIG. 4A, a part of the metal plate-like member that becomes the upper wall portion 32A is punched out by pressing or the like to form the window portion 32Aa, and one of the plate-like members is formed. A folded portion 33 is formed at each of the end portion and the other end portion, and the one end portion and the other end portion are brought close to each other at a predetermined folding position (shown here by a broken line) in a substantially vertical direction. By bending, the wind tunnel 30A having the side wall portions 31 and 31 and the upper wall portion 32A can be formed.

  When the wind tunnel 30A is formed with a thickness dimension of, for example, about 0.5 to 0.6 mm, the wind tunnel 30A can be thinned. Further, with this thickness, the folded portion 33 can be easily formed, and an appropriate spring bag effect can be obtained when the fixed portion 33a is fitted into the wind tunnel fixing groove 14, so that the fixed portion 33a and the wind tunnel fixing groove are obtained. The degree of adhesion with the 14 side wall portions 14a, 14a can be further improved.

Next, a mode in which the heat radiating fins 20A and the wind tunnel 30A are fixed to the support substrate 10A in the process of manufacturing the heat radiator 1A will be described.
First, a mode in which the heat radiation fin 20A is fixed to the support substrate 10A will be described.

  As shown in FIG. 3A, the fixed portion 20A2 of the radiation fin 20A is inserted into the fin fixing groove 13A of the support substrate 10A from above. At this time, the height H1 (see FIG. 2B) of the folded portion 20A1 is formed to be larger than the depth D1 (see FIG. 2B) of the fin fixing groove 13A. Is inserted into the fin fixing groove 13A, the portion 20A3 of the folded portion 20A1 excluding the fixed portion 20A2 protrudes upward from the upper surface portion 11 where the opening 13Ad of the fin fixing groove 13A is formed. Note that the fin fixing groove 13A is formed to be approximately the same size or slightly larger than the plate thickness T3 of the fixed portion 20A2, so that when the fixed portion 20A2 is press-fitted into the fin fixing groove 13, the fixed portion 20A2 is A little springback occurs in the fin fixing groove 13A, and a pressing force toward the side wall portions 13Aa and 13Aa acts.

  In this state, as shown in FIG. 3 (b), a caulking blade 40A having a tip V40Aa pointed in a V-shaped cross section is inserted between the radiating fins 20A. Then, the upper surface portions 11 on both sides of the fin fixing groove 13A are crushed by a predetermined amount and deformed so as to be pushed and expanded along the shape of the front end portion 40Aa of the caulking blade 40A, thereby forming the caulking groove portion 15 having a substantially V shape in cross section. To do. At this time, it is preferable to attach a plurality of caulking blades 40A to a press machine or the like (not shown) because the plurality of upper surface portions 11 can be crushed simultaneously.

  In this way, the pressing force at the time of forming the caulking groove 15 is applied to the side wall portions 13Aa and 13Aa of the fin fixing groove 13A, that is, the pressing force toward the inner side of the groove acts on the side wall portions 13Aa and 13Aa. Thus, the fixed portion 20A2 fitted in the fin fixing groove 13A is sandwiched from both sides by the entire side wall portions 13Aa and 13Aa and fixed by caulking, so that the radiating fin 20A is firmly attached to the support substrate 10A. It is closely fixed to.

Next, a mode in which the wind tunnel 30A is fixed to the support substrate 10A will be described.
As shown in FIG. 3C, the fixed portion 33a of the side wall portion 31 of the wind tunnel 30A is inserted into the wind tunnel fixing groove 14 of the support substrate 10A from above the radiating fin 20A fixed to the support substrate 10A. At this time, since the height dimension H3 (see FIG. 2B) of the folded portion 33 is formed larger than the depth dimension D2 of the wind tunnel fixing groove 14 (see FIG. 2B), the fixed portion 33a. Is inserted into the wind tunnel fixing groove 14, the portion 33 b of the folded portion 33 excluding the fixed portion 33 a is in a state of protruding upward from the opening portion of the wind tunnel fixing groove 14. The wind tunnel fixing groove 14 is formed to be approximately the same as or slightly larger than the thickness dimension T4 of the folded portion 33. Therefore, when the fixed portion 33a is press-fitted into the wind tunnel fixing groove 14, the fixed portion 33a is By slightly springing back in the fixed groove 14, a pressing force to the side wall portions 14a and 14a acts.

  In this state, as shown in FIG. 3 (d), the caulking blade 40B, which is attached to a press machine or the like (not shown) and whose tip 40Ba is sharp in a V-shaped cross section, is inserted outside the side wall 31. Then, the upper surface portion 11 outside the wind tunnel fixing groove 14 is crushed by a predetermined amount and deformed so as to be pushed and expanded along the shape of the tip portion 40Ba of the caulking blade 40B, thereby forming the caulking groove portion 16 having a substantially V-shaped cross section. To do.

  In this manner, the pressing force when forming the caulking groove portion 16 is applied to the side wall portions 14a and 14a of the wind tunnel fixing groove 14, that is, the pressing force toward the inner side of the groove acts on the side wall portions 14a and 14a. Thus, the fixed portion 33a fitted in the wind tunnel fixing groove 14 is clamped and fixed from both sides by the entire side wall portions 14a and 14a, so that the wind tunnel 30A is firmly fixed to the support substrate 10A. Closely fixed.

  As described above, the radiator 1A is manufactured by fixing the radiating fins 20A to the support substrate 10A and then fixing the wind tunnel 30A to the support substrate 10A.

  According to the heat radiator 1A according to the first embodiment as described above, the following operation is obtained. In addition, since the effect | action by crimping and fixing the radiation fin 20A to the support substrate 10A and the effect by caulking and fixing the wind tunnel 30A to the support substrate 10A are common, hereinafter, the wind tunnel 30A is caulked and fixed to the support substrate 10A. An explanation will be given by taking the action of as an example.

According to the radiator 1A according to the first embodiment, the wind tunnel 30A can be firmly and firmly fixed to the support substrate 10A without using a mounting member (not shown) such as a screw or a rivet. The heat radiator 1A can be reduced.
In addition, by fitting and fixing the wind tunnel 30A in the wind tunnel fixing groove 14 provided in the upper surface portion 11 of the support substrate 10A, the heat generation component H (see FIG. 2A) is generated from the support substrate 10A to the wind tunnel 30A. Since heat can be transmitted satisfactorily, heat generated by the heat generating component H (see FIG. 2A) from the wind tunnel 30A can be radiated into the air. Thereby, the thermal radiation efficiency of 1 A of radiators can be improved significantly.

  Further, the wind tunnel 30 </ b> A has the folded portion 33 and is caulked and fixed to the wind tunnel fixing groove 14 by the fixed portion 33 a occupying the majority of the folded portion 33, that is, the caulked groove portion 16 is provided outside the wind tunnel fixing groove 14. Thus, since the fixed portion 33a fitted in the wind tunnel fixing groove 14 is clamped and fixed from both sides by the entire side wall portions 14a and 14a, the wind tunnel 30A is firmly fixed and firmly fixed to the support substrate 10A. can do. Thereby, it is possible to prevent the wind tunnel 30A from falling off the support substrate 10A.

  At this time, the folded portion 33 is formed with a height larger than the depth of the wind tunnel fixing groove 14, and a part thereof protrudes from the wind tunnel fixing groove 14, so that the caulking groove portion 16 is formed in the wind tunnel fixing groove 14. Even when a pressing force is applied, it is possible to prevent the pressing force from being unevenly transmitted to a part of the wind tunnel fixing groove 14, and the pressing force is evenly applied to the entire side wall portions 14a, 14a of the wind tunnel fixing groove 14. Can be generated. In addition, the degree of adhesion and the fixing strength between the wind tunnel 30A and the support substrate 10A can be improved. Thereby, the thermal conductivity between the wind tunnel 30A and the support substrate 10A can be improved, and as a result, the heat dissipation efficiency of the radiator 1A can be improved. Further, since the vibration resistance of the wind tunnel 30A can be improved, the wind tunnel 30A can be prevented from being damaged or detached due to vibration during transportation or use. Furthermore, since the uprightness of the wind tunnel 30A can be ensured, the appearance is improved.

  As mentioned above, although 1st embodiment of this invention was described, this invention is not restricted to the content described in 1st embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably.

  In the radiator 1A, the caulking groove portion 15 is pressed against the upper surface portion 11 between the fin fixing grooves 13A of the support substrate 10A and the upper surface portion 11 outside the air channel fixing groove 14 of the support substrate 10A is pressed. However, the present invention is not limited to this. For example, a caulking groove may be provided in advance on the upper surface portion 11 of the support substrate 10A, and the caulking groove portion may be formed by crushing the caulking groove. By providing the caulking groove, it is possible to prevent the caulking blade from blurring and perform caulking stably.

  In the heat radiator 1A, the folded portion 33 of the wind tunnel 30A is formed to face outward. However, the present invention is not limited to this, and the folded portion 33 may be directed to the inside, and the direction of one and the other folded portion 33 may be different. good. It is preferable to form the folded portion 33 of the wind tunnel 30A toward the outside because the caulking blade of the press machine can be easily inserted.

  In the radiator 1A, the radiating fin 20A is formed in a substantially I shape in cross-section by forming the folded portion 20A1 at the lower end portion of the thin metal plate. However, the present invention is not limited to this, and for example, the folded radiating fins 20A and 20A are folded. With the portion 20A1 (fixed portion 20A2) facing outward, the upper end portions 20Aa and 20Aa are connected by a flat plate portion so as to have a substantially inverted U shape in cross section, and one fixed portion 20A2 is fixed to one fin fixing groove 13A. The other fixed portion 20A2 may be fixed to another fin fixing groove 13A adjacent to one fin fixing groove 13A.

  In the heat radiator 1A, the wind tunnel 30A is fixed to the support substrate 10A by providing the folded portion 33 in the wind tunnel 30A and being fitted and fixed to the wind tunnel fixing groove 14 by the fixed portion 33a. However, the present invention is not limited to this. . For example, it is good also as adjusting the plate | board thickness of 30 A of wind tunnels, and not providing the folding | returning part 33. FIG. In this case, it is preferable to form the wind tunnel 30A with a thickness of 0.7 to 1.2 mm. The wind tunnel fixing groove 14 is substantially equal to the plate thickness of the wind tunnel 30A. In this way, the lower end portion of the wind tunnel 30A can be brought into close contact with the wind tunnel fixing groove 14 without providing the turn-back portion 33, and the wind tunnel 30A can be firmly and firmly fixed to the support substrate 10A. Moreover, since sufficient rigidity is obtained for the wind tunnel 30A, the uprightness and vibration resistance of the wind tunnel 30A can be ensured. In addition, it is good also as adjusting plate | board thickness similarly about 20 A of radiation fins, and not providing the folding | returning part 33. FIG.

<Second embodiment>
Next, a radiator 1A ′ according to a second embodiment of the present invention will be described with reference to FIG. 4B and FIGS. 1 and 2 as appropriate. A radiator 1A ′ (see FIG. 1) according to the second embodiment includes a support substrate 10A, a radiation fin 20A, and a wind tunnel 30A ′. Since the configuration other than the wind tunnel 30A ′ is the same as that described in the first embodiment, the same reference numerals are given and redundant description is omitted.

  As shown in FIG. 4B, the wind tunnel 30A ′ includes side wall portions 31 and 31 that respectively cover one side surface and the other side surface of the heat radiating fin 20A fitted and fixed to the support substrate 10A. The upper wall portion 32A ′ that covers the upper side of the fin 20A and the end wall portion 34 that covers one end face side of the radiating fin 20A are configured. Since the wind tunnel 30A ′ is obtained by changing the configuration of the upper wall portion 32A of the wind tunnel 30A and adding the end wall portion 34, the same components as those of the other wind tunnel 30A are denoted by the same reference numerals, and are duplicated. Description to be omitted is omitted.

  The upper wall portion 32A ′ covers the upper side of the heat radiating fin 20A fixed to the support substrate 10A. One side surface and the other side surface are continuous with the side wall portions 31 and 31, and one end surface is the end wall portion 34. The length is substantially the same as the length of the support substrate 10A, the width is slightly smaller than the width of the support substrate 10A, and is formed in a long rectangular shape.

  The end wall portion 34 covers one end surface side of the heat radiation fin 20A fixed to the support substrate 10A, is continuous with the upper wall portion 32A ′, and is approximately 90 degrees below the one end surface of the upper wall portion 32A ′. This is a rectangular member that is bent into two. That is, the end wall portion 34 is provided in a direction orthogonal to the side wall portions 31, 31, the width thereof is substantially the same as the width between the side wall portions 31, 31, and the height is the side wall portions 31, 31. It is almost equivalent to the height of.

  Moreover, the end wall part 34 has the window part 34a used as the supply channel which supplies the wind from the air blower F (refer FIG. 1) between 20 A of radiation fins. Since the configuration of the window 34a is basically the same as that of the window 32Aa described in the upper wall portion 32A of the first embodiment, detailed description thereof is omitted.

According to such a heat radiator 1A ′, when the blower F (see FIG. 1) is provided on the end wall portion 34 side, the blower F (through the window portion 34a formed on the end wall portion 34 of the wind tunnel 30A ′. The wind from FIG. 1) can be satisfactorily supplied between the radiation fins 20A.
In addition, although the end wall part 34 was provided in one end surface of the radiation fin 20A here, it is not restricted to this, You may provide in the other end surface according to the installation position of the air blower F (refer FIG. 1). These may be provided on one and the other end faces.

  In the first embodiment, the heat dissipating fins are the heat dissipating fins 20A, but the present invention is not limited to this. Hereinafter, an example of a radiator in which another radiating fin is applied instead of the radiating fin 20 </ b> A will be described with reference to FIGS. 5 to 9. In addition, below, about the component which is common with 1 A of heat radiators which concern on 1st embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

As shown in FIG. 5A, the radiator 1B includes a support substrate 10A, a radiation fin 20B, and a wind tunnel 30A.
The heat radiating fin 20B is a rectangular thin plate member made of a material having high thermal conductivity such as copper, copper alloy, aluminum or aluminum alloy, and is bent in a folded shape at the bottom portion 20Bb so as to be substantially I-shaped in cross section. Yes. In other words, the heat dissipating fin 20B is formed by folding two thin metal plates in a folded shape at the bottom portion 20Bb, and the entire thickness dimension T5 is approximately twice the plate thickness T1. Note that the bent portion to which the bending stress is most applied at the time of folding slightly bulges outward in the width direction due to the rigidity of the metal thin plate. The bent portion (fixed portion 20B2) of the heat radiating fin 20B is fixed to the support substrate 10A by being fixed to the fin fixing groove 13A of the support substrate 10A.

  According to the heat radiator 1B, in addition to the operation described in the heat radiator 1A, the heat dissipating fin 20B has a thickness twice as large as the plate thickness T1, thereby thinning the metal thin plate forming the heat dissipating fin 20B. Even if it is a case, the fall of fin efficiency can be suppressed and the heat dissipation efficiency of the heat radiator 1B can be improved as a result.

In the radiator 1B, the radiating fin 20B has a substantially I shape in sectional view, but may be a radiating fin 20B 'in a substantially V shape in sectional view as shown in FIG.
The heat radiating fin 20B 'is a state where the heat radiating fin 20B is fixed to the fin fixing groove 13A of the support substrate 10A, and further, the tip end is caulked from the upper end portion 20Ba side of the heat radiating fin 20B to have a substantially V-shaped cross section. It can be formed by inserting a blade (not shown) between the upper end portions 20Ba and 20Ba and spreading the radiating fin 20B in the width direction along the shape of the tip portion (not shown) of the caulking blade. Thereby, since a surface area can be expanded with respect to the thermal radiation fin 20B, thermal radiation efficiency can be improved more.

  As shown in FIG. 6A, the radiator 1C is erected on the support substrate 10C so as to cover the support substrate 10C, the radiating fins 20C made of a thin metal plate erected on the support substrate 10C, and the radiating fins 20C. And a wind tunnel 30A. The radiator 1C is obtained by changing the configuration of the radiation fins and the configuration of the support substrate corresponding to the configuration of the radiator fins to the radiator 1A according to the first embodiment.

  The support substrate 10C is a base for the radiator 1C, and includes fin fixing grooves 13C, wind tunnel fixing grooves 14, 14, caulking groove parts 15C, and caulking groove parts 16, 16.

  The fin fixing groove 13C has a left side wall part 13Ca1 and a right side wall part 13Ca2 that fall from the upper surface part 11, and a bottom part 13Cb provided between the left side wall part 13Ca1 and the right side wall part 13Ca2, and is U-shaped in cross section. Is formed. The fin fixing groove 13C has the same configuration as the fin fixing groove 13A except that the width dimension is set according to the thickness of the heat dissipating fin 20C fitted inside.

  Further, the caulking groove portion 15C is a groove that is pressed against the upper surface portion 11 on one side of the fin fixing groove 13C, and is substantially V-shaped in sectional view here. The caulking groove portion 15C preferably has a depth dimension D6 of 1/8 or more and 1 or less when the depth dimension D5 of the fin fixing groove 13C is 1.

The heat radiating fin 20 </ b> C includes a plurality of first heat radiating fins 21 a and a plurality of second heat radiating fins 22 a.
The first heat dissipating fin 21a is a thin plate member that is folded back at the top portion 21a3 so as to have a substantially inverted V shape in cross section. One end 21a1 is fixed to one fin fixing groove 13C and the other end 21 a 2 is fixed to another fin fixing groove 13 </ b> C that is recessed adjacent to the upper surface portion 11. In this way, rigidity can be improved.

  The second radiating fins 22a are thin plate members, arranged on the outer sides in the width direction of the first radiating fins 21a, and fixed to the fin fixing grooves 13C by the lower end portions 22a1.

  In addition, the thickness, length, and height of the 1st radiation fin 21a and the 2nd radiation fin 22a can be set suitably. Here, the distance P1 shown in FIG. 6A is larger than the distance P2. According to this, the wind from the fan F (refer FIG. 1) can be supplied with good balance to both the area | region shown by the distance P1, and the area | region shown by the distance P2. When the distance P1 is 1.5 times to 3 times the distance P2, more preferably 1.6 times to 2 times, the heat radiation efficiency can be effectively improved.

  Moreover, it is preferable that the distance P3 and the distance P4 shown in FIG. According to this, wind can be supplied to each space indicated by the distance P3 and the distance P4 with a good balance.

  In such a heat radiating fin 20C, the first heat radiating fin 21a and the second heat radiating fin 22a are arranged in the fin fixing groove 13C, respectively, and the tip portion is, for example, V-shaped on the upper surface portion 11 adjacent to the fin fixing groove 13C. It is possible to caulk and fix the fin fixing groove 13C by inserting a caulking blade (not shown) sharp in a shape, crushing the upper surface portion 11 by a predetermined amount and forming a caulking groove portion 15C.

  According to the radiator 1C, in addition to the function of the radiator 1A of the first embodiment, the first radiator fin 21a and the second radiator fin 21b can be fixed to one fin fixing groove 13, so that the radiator 1C The heat radiation area of the heat radiator 1C can be increased, and consequently, the heat radiation efficiency of the heat radiator 1C can be improved. In addition, since it is not necessary to increase the number of fin fixing grooves 13C according to the number of radiating fins 20C, the structure of the radiator 1C is simplified.

  As shown in FIG. 6B, the radiator 1D includes a support substrate 10C, a radiation fin 20D, and a wind tunnel 30A.

  The heat radiating fin 20D includes a plurality of sets of a first heat radiating fin 21a and a second heat radiating fin 22d having a shape closed above the top portion 21a3 of the first heat radiating fin 21a.

The second heat radiation fins 22d are fixed to one outer side of the first heat radiation fin 21a and extend upward, and the second heat radiation surface is fixed to the other outer side of the first heat radiation fin 21a and extends upward. 23b and a substantially reverse U-shaped cross-sectional view by a third heat radiating surface 23c extending in the horizontal direction above the top 21a3 of the first heat radiating fin 21a so as to connect the upper ends of the first heat radiating surface 23a and the second heat radiating surface 23b. It has become a shape.
Here, the third heat radiation surface 23c, which is the upper end portion of the second heat radiation fin 22d, is higher than the top portion 21a3 of the first heat radiation fin 21a.

  The second heat radiating fin 22d has an end 23a1 of the first heat radiating surface 23a fixed to the one fin fixing groove 13C, and an end 23b1 of the second heat radiating surface 23b recessed next to the one fin fixing groove 13C. The fin fixing groove 13C is fixed. The first radiating fins 21a and the second radiating fins 22d can be fixed to the support substrate 10C in the same manner as described for the radiator 1C.

  According to the heat radiator 1D, in addition to the action of the heat radiator 1C according to the second embodiment, the second heat radiation fin 22d has a shape closed above the top portion 21a3 of the first heat radiation fin 21a. The rigidity of the fin 22e can be improved, and the vibration resistance of the second radiation fin 22d can be improved. Moreover, according to the heat radiator 1D, the number of parts constituting the heat radiation fin can be reduced compared to the heat radiator 1C according to the second embodiment, and the heat radiator 1D becomes inexpensive.

  Here, the shape of the second radiating fin 22d of the radiating fin 20D may be a shape closed above the first radiating fin 21a, and may be, for example, a substantially inverted V shape in cross-section.

  For example, a dowel having a height substantially equal to the thickness of the second heat radiation fin 22a is provided on the outer surface of the heat radiation surface 21a4 of the first heat radiation fin 21a, and the first heat radiation portion 23a of the second heat radiation fin 22a By providing a through hole corresponding to the dowel in the second heat dissipating portion 23b and fitting the dowel into the through hole, the first heat dissipating fin 21a and the second heat dissipating fin 22a are integrated in advance before fixing to the support substrate 10C. You can leave it. According to this, since it is not necessary to align the first radiating fins 21a and the second radiating fins 22a, the first radiating fins 21a can be more easily fixed to the support substrate 10C. Moreover, since the 1st radiation fin 21a and the 2nd radiation fin 22a can be closely_contact | adhered, thermal conductivity can be made favorable.

As shown in FIG. 7A, the heat radiator 1E includes a support substrate 10E, heat radiating fins 20D, and a wind tunnel 30A.
The support substrate 10E includes fin fixing grooves 13E, wind tunnel fixing grooves 14, 14, caulking groove portions 15C, and caulking groove portions 16C, 16C.

  The fin fixing groove 13E has a left side wall part 13Ea1 and a right side wall part 13Ea2 that fall from the upper surface part 11 that falls from the upper surface part, and a bottom part 13Eb provided between the left side wall part 13Ea1 and the right side wall part 13Ea2. Configured. The fin fixing groove 13E is the same as the fin fixing groove 13C except for the width of the bottom portion 13Eb.

The heat radiating fin 20D includes a first heat radiating fin 21a and a second heat radiating fin 22e.
The second heat dissipating fins 22e are formed by folding a thin metal plate in a folded shape at the bottom 22e2 so as to overlap each other, and the overall thickness dimension is approximately twice the plate thickness. Note that the bent portion to which the bending stress is most applied at the time of folding slightly bulges outward in the width direction due to the rigidity of the metal thin plate.

  The heat radiating fin 20D is the same as the case where one end (the one end 21a1 or the other end 21a2) of the first heat radiating fin 21a and the second heat radiating fin 22e are fitted to the supporting substrate 10C. It is fixed to one fin fixing groove 13E by a technique.

  According to this, fin efficiency can be improved by having constituted the 2nd radiation fin 22e so that it may have thickness twice as much as plate thickness.

  As shown in FIG. 7B, the heat radiator 1F includes a support substrate 10E, heat radiating fins 20F, and a wind tunnel 30A.

Radiating fin 20F is configured to have a first radiating fins 21a, and the second heat radiating fin 22f as a closed shape over the top 21a ₃ of the first heat radiation fins 21a, a.

  The second radiating fin 22f is a thin plate member, fixed to one outer side of the first radiating fin 21a and extending upward, and fixed to the other outer side of the first radiating fin 21a and upward. The second heat radiating surface 24b extends, and the third heat radiating surface 24c extends in the horizontal direction above the top 21a3 of the first heat radiating fin 21a so as to connect the first heat radiating surface 24a and the upper end side of the second heat radiating surface 24b. It has a substantially inverted U shape. In addition, the second heat radiation fin 22f has a first heat radiation surface 24a bent in a folded shape at a bottom portion 24a2, and a third heat radiation surface 24c bent in a folded shape at a bottom portion 24c2, each having a thickness dimension approximately twice the plate thickness. Yes. Note that the bent portion to which the bending stress is most applied at the time of folding slightly bulges outward in the width direction due to the rigidity of the metal thin plate.

  The radiation fin 20F can be fixed to the support substrate 10E by the same method as that for fixing the radiation fin 20C described in the second embodiment to the support substrate 10C.

  According to the radiator 1F, in addition to the action of the radiator 1C according to the second embodiment and the action of the radiator 1D according to the modification 1, the second radiation fin 22f is configured to have a thickness twice as large as the plate thickness. As a result, fin efficiency can be improved.

  As shown in FIGS. 8 and 9, the heat radiator 1 </ b> G includes a support substrate 10 </ b> G, heat radiation fins 20 </ b> G, and a wind tunnel 30 </ b> A.

  The support substrate 10G includes fin fixing grooves 13G, engaging portions 18, 18, caulking groove portions 19, 19, wind tunnel fixing grooves 14, 14, caulking groove portions 16, 16, and caulking groove portion 19. Yes.

  As shown in FIG. 9A, a plurality of fin fixing grooves 13G are recessed from the upper surface portion 11 toward the lower surface portion 12 side of the support substrate 10G, and side wall portions 13Ga falling from the upper surface portion 11 at a predetermined interval. 13Ga and a bottom portion 13Gb provided between the side wall portions 13Ga and 13Ga.

  The side wall portion 13Ga is formed continuously from a falling portion 13Ga1 that falls substantially perpendicular to the upper surface portion 11 of the support substrate 10A and a lower end portion of the falling portion 13Ga1, and is a taper that increases in diameter toward the bottom portion 13Gb. Part 13Ga2 and a corner part 13Ga3 having a round shape formed continuously at the lower end of the taper part 13Ga2.

Bottom 13Gb is formed in a substantially parallel flat plate and the upper surface portion 11 of the supporting substrate 10G, at least in part, are formed in parallel with the bottom 13Gb, have the ridge portions 13Gb ₁ that increasing the height than the bottom 13Gb Configured.

  The engaging portion 18 engages an outermost fin bottom portion 27 of the heat dissipating fin 20G, which will be described later, and a connecting portion 26 continuous to the outermost fin bottom portion 27, and is disposed inside the wind tunnel fixing grooves 14, 14. Is provided. The engaging portion 18 includes an engaging side wall portion 18a that falls vertically from the upper surface portion 11, and an engaging bottom portion 18b that is substantially parallel to the upper surface portion 11 that is formed continuously from the engaging side wall portion 18a. Have.

  The caulking groove portion 19 is for fixing the outermost fin bottom portion 27 to the engaging portion 18, is a groove that is crushed against the upper surface portion 11, and is formed outside the engaging portion 18.

  The radiating fin 20G is connected to the support substrate 10G that connects the fin bottom 24 substantially parallel to the support substrate 10G, the fin top 25 substantially parallel to the support substrate 10G, and the fin bottom 24 and the fin top 25. A plurality of sets of substantially vertical connecting portions 26 are provided, and a so-called corrugated shape is formed. A plurality of fin bottom portions 24 and fin top portions 25 are alternately formed. Further, the outermost fin bottom portion 27 that is shorter than the other fin bottom portions 24 and extends toward the outer side in the width direction of the heat radiation fin 20G is formed in the outermost connection portion 26 of the heat radiation fin 20G. ing.

  The radiation fin 20G is fixed to the fin fixing groove 13G by the fixed portion 28. The dimension between the outer wall portions of the connecting portion 26 of the fixed portion 28 is formed to be substantially equal to or slightly smaller than the width of the fin fixing groove 13G on the opening side. Thereby, the fixed part 28 can be smoothly inserted into the fin fixing groove 13G.

Next, how the radiating fin 20G is fixed to the fin fixing groove 13G will be described with reference to FIGS.
As shown in FIG. 9A, in a state where the fixed portion 28 is fitted to the upper portion of the flange portion 13Gb1 of the fin fixing groove 13G, as shown in FIG. From the middle, the fixed portion 28 is pressed toward the flange portion 13Gb1 of the fin fixing groove 13G with the tip portion of the caulking blade 40C having the concave portion 40Ca at the tip portion. As a result, the fixed portion 28 comes into close contact with the shape of the flange portion 13Gb1, and is pushed and expanded from the flange portion 13Gb1 in the width direction of the bottom portion 13Gb of the fin fixing groove 13G, along the shape of the corner portion 13Ga3. In close contact. Further, it is pushed upward from the corner portion 13Ga3 and closely adheres along the shapes of the tapered portion 13Ga2 and the falling portion 13Ga1. The concave portion 40Ca at the tip end of the caulking blade 40C allows the fixed portion 28 to be closely adhered along the shape of the flange portion 13Gb1 in consideration of the width and height of the lower end portion of the flange portion 13Gb1 and the thickness of the fixed portion 28. It is preferable that the width and depth be as large as possible.

  At the same time, as shown in FIG. 9B, the outermost connecting portion 26 and the outermost fin bottom portion 27 are fitted to the engaging portion 18, and the engaging portion is engaged with the tip portion 40Da of the caulking blade 40D. The upper surface portion 11 is deformed so as to spread on the outermost fin bottom portion 27 by pressing the upper surface portion 11 outside 18 to form the caulking groove portion 19. As a result, the outermost fin bottom portion 27 is fitted and fixed to the engagement portion 18 as shown in FIG.

  Further, in this state, as shown in FIG. 9 (d), the fixed portion 33a of the wind tunnel 30A is fitted into the wind tunnel fixing groove 14, and, for example, the front end portion 40Da of the caulking blade 40D is placed outside the wind tunnel fixing groove 14. By pressing the upper surface portion 11 to form the caulking groove portion 15, the fixed portion 33 a can be caulked and fixed in the wind tunnel fixing groove 14.

  According to the heat radiator 1G, in addition to the action of the heat radiator 1A according to the first embodiment, by configuring the heat radiation fin 20G as one member, the number of parts can be reduced, and the heat radiator 1G becomes inexpensive. Further, by bringing the fixed portion 28 into close contact along the shape of the fin fixing groove 13G, the contact area between the radiation fin 20G and the support substrate 10G can be increased, and the thermal conductivity can be improved. In addition, the fixing strength of the radiating fin 20G to the support substrate 10G can be improved.

The heat radiator 1H includes a support substrate 10H, a plurality of thin plate-like heat radiation fins 20H that are continuously provided on the upper surface portion 11 of the support substrate 10H at predetermined intervals, and a wind tunnel 30A.
The support substrate 10H has wind tunnel fixing grooves 14 and 14 and caulking groove portions 15 and 15, and a plurality of radiating fins 20H are provided inside the wind tunnel fixing grooves 14 and 14 at intervals in the width direction. ing. In addition, the formation interval, thickness, and height of the radiation fins 20H can be set as appropriate.
The support substrate 10H and the heat radiating fins 20H can be integrally formed by, for example, extrusion.

  According to the heat radiator 1H configured as described above, in addition to the operation of the heat radiator according to the first embodiment, the support substrate 10H and the heat radiating fins 20H are integrally formed, so that the number of parts can be reduced. In addition, since it is not necessary to fix the radiating fins 20H to the support substrate 10H, the configuration is simplified and the radiator 1H is inexpensive.

1A to 1H Radiator 10A, 10C, 10E, 10H Support substrate 11 Upper surface portion 12 Lower surface portion 13A, 13C, 13E, 13G Fin fixing groove 14 Wind tunnel fixing groove 15 Caulking groove portion 16 Caulking groove portion 17 Hook portion 20A-20H Radiating fin 21a First One radiation fin 22a, 22d, 22e, 22f Second radiation fin

Claims (5)

A support substrate;
Radiating fins made of a thin metal plate standing on one surface of the support substrate;
A wind tunnel made of a thin metal plate having a side wall portion covering at least one side surface of the heat dissipating fin standing on the one surface portion and an upper wall portion covering the upper side of the heat dissipating fin extending on the side wall portion; A radiator that radiates heat by supplying wind between the radiating fins,
In the support substrate, a wind tunnel fixing groove for fixing the wind tunnel is recessed in a width direction outer side than a fixing position of the radiation fin in the one surface portion,
The radiator is fitted and fixed to the wind tunnel fixing groove by a lower end portion of the side wall portion. The side wall of the wind tunnel is
The lower end portion is folded back toward the upper end portion, and the thickness dimension of the folded portion has a thickness more than twice the plate thickness, and the height dimension is formed larger than the depth dimension of the wind tunnel fixing groove. A folded portion formed with a width dimension equal to or slightly smaller than the width dimension of the wind tunnel fixing groove,
The radiator according to claim 1, wherein the fixed portion occupying a majority of the folded portion is fitted and fixed in the wind tunnel fixing groove. The support substrate is
A concave caulking groove portion that is recessed in parallel to the wind tunnel fixing groove and formed in a width direction outside of the wind tunnel fixing groove and having a depth dimension equal to or less than the depth of the wind tunnel fixing groove,
3. The heat dissipation according to claim 2, wherein the fixed portion is clamped and fixed by being pressed by a pressing force generated in the entire groove side wall portion of the wind tunnel fixing groove due to the formation of the caulking groove portion. vessel. The wind tunnel is
The heat dissipation according to any one of claims 1 to 3, wherein a notch portion serving as a supply passage for supplying the wind between the heat dissipating fins is formed in the upper wall portion. vessel. The wind tunnel is
Continuing to the end surface of the upper wall portion, provided in a direction orthogonal to the side wall portion, further having an end wall portion covering the end surface side of the heat radiating fin,
The heat dissipation according to any one of claims 1 to 3, wherein a cutout portion serving as a supply passage for supplying the wind between the heat radiation fins is formed in the end wall portion. vessel.

Images