JP2012018947A - Heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat sink which facilitates the mounting operation of a radiating fin on a radiating plate.SOLUTION: A heat sink 1 comprises: a radiating plate 2; wave vertex parts 5a; wave bottom parts 5b; connecting parts 5c for connecting the wave vertex parts 5a to the respective wave bottom parts 5b; and a corrugated radiating fin 5 attached to the radiating plate 2 with the wave bottom parts 5b making contact with the radiating plate 2. The radiating fin 5 is attached to the radiating plate 2 with two comb-shaped mounting fixtures 6. Each of the mounting fixtures 6 comprises: a base part 11 fixed to the radiating plate 2 on an outer side in the length direction of the wave bottom parts 5b of the radiating fin 5; and a plurality of pressing teeth 12 which are arranged on the base part 11 at intervals in the longitudinal direction of the base part 11, and which press the wave bottom parts 5b of the radiating fin 5 against the radiating plate 2. The base part 11 of the mounting fixture 6 is mechanically fixed to the radiating plate 2 at positions fewer than the number of the wave bottom parts 5b of the radiating fin 5.

Description

  The present invention relates to a radiator that radiates heat generated from a heating element such as an electronic component.

  As this type of heatsink, a corrugate has a heat sink, a wave crest, a wave bottom, and a connecting portion that connects the wave crest and the wave bottom, and the corrugation is attached to the heat sink with the wave bottom in contact with the heat sink. What consists of a thermal radiation fin is known (refer patent document 1).

  In the radiator disclosed in Patent Document 1, a plurality of protrusions are formed on the heat radiating plate by stamping the heat radiating plate, and a plurality of through holes into which the protrusions are inserted are formed on the wave bottom portion of the radiating fin. Formed at intervals in the length direction, passing the protrusions of the heat sink through the through holes of the heat sink fins and caulking the protrusions, the heat dissipating fins are attached to the heat sink at a location greater than the number of wave bottoms of the heat sink fins. It is fixed mechanically.

  However, in the radiator disclosed in Patent Document 1, since there are many places where the wave bottoms of the radiating fins are mechanically fixed to the radiating plate, there is a problem that the work of attaching the radiating fins to the radiating plate is troublesome.

Japanese Utility Model Publication No. 56-10189

  An object of the present invention is to provide a radiator that solves the above-described problems and that makes it easy to attach a radiating fin to a radiating plate.

  In order to achieve the above object, the present invention comprises the following aspects.

1) a corrugated heat dissipating fin attached to the heat dissipating plate having a heat dissipating plate, a wave crest portion, a wave bottom portion and a connecting portion that connects the wave crest portion and the wave bottom portion, and the wave bottom portion being in contact with the heat dissipating plate; In a radiator consisting of
The radiating fins are attached to the radiating plate by two comb-like fixtures, and each fixture is fixed to the radiating plate on the outer side in the length direction of the wave bottom portion of the radiating fins, The heat sink is provided with a plurality of presser teeth that are spaced apart in the longitudinal direction and press the wave bottom of the radiating fin toward the heat radiating plate, and radiates heat at a place where the base of the fixture is less than the number of wave undulated portions of the radiating fin. A radiator that is mechanically fixed to a plate.

  2) The wave bottom of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture radiates more heat than the surface of the presser teeth on the side of the radiating plate. In the state before the wave bottom of the radiating fin is pressed, the surface on the radiating plate side of the presser teeth is a flat surface parallel to the support surface of the radiating plate. The radiator according to the above 1), wherein a protruding height of the protruding portion of the base portion with respect to the flat surface to the support surface of the radiator plate is equal to or less than a lower limit value of an allowable limit of the thickness of the radiating fin.

  3) The wave bottom of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture radiates more heat than the surface of the presser teeth on the side of the radiating plate. In the state before having pressed the wave bottom of the radiating fin, the surface on the radiating plate side of the presser tooth portion is inclined to the radiating plate side from the base side toward the tip, The above 1) description, wherein the protruding height of the protruding portion of the base relative to the base side end of the inclined surface to the support surface of the heat radiating plate is equal to or less than the lower limit of the allowable limit of the thickness of the radiating fin. Heatsink.

  4) The wave bottom of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture radiates more heat than the surface of the presser teeth on the side of the radiating plate. By forming a recess on the heat sink side surface of the presser teeth at the end of the presser teeth on the base side, a deformed part that is thinner than other parts is provided. In the state before pressing the wave bottom portion of the radiating fin, the portion excluding the concave portion on the surface of the radiating plate side of the pressing tooth portion becomes an inclined surface inclined toward the radiating plate side from the concave portion side toward the tip. In addition, the protrusion height to the support surface of the heat sink at the protrusion portion of the base portion with respect to the concave portion side end portion of the inclined surface is equal to or less than the lower limit of the allowable limit of the thickness of the heat dissipation fin. Radiator.

  5) The wave bottom of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture radiates more heat than the surface of the presser teeth on the side of the radiating plate. There is a protrusion that protrudes on the plate side, and a pressing projection that protrudes toward the heat sink and presses the wave bottom of the radiation fin is provided at the tip of the presser tooth. In the state before pressing, the protrusion height of the base protrusion relative to the heat sink side surface of the presser tooth part to the support surface of the heat sink is greater than the protrusion height of the pressing protrusion relative to the heat sink side surface of the presser tooth part. The radiator according to 1) above.

  6) In the state before pressing the wave bottom of the radiating fin by the pressing protrusion, the protrusion height to the support surface of the radiating plate in the protruding portion of the base relative to the surface on the radiating plate side in the pressing tooth portion, and the radiating plate side of the pressing tooth portion The radiator according to the above 5), wherein a difference between the pressing protrusion on the surface and the protrusion height to the support surface of the radiator plate is equal to or less than a lower limit value of an allowable limit of the thickness of the radiation fin.

According to the radiators 1) to 6) above, the radiation fins are attached to the radiation plate by two comb-shaped attachments, and each attachment is on the outside in the length direction of the wave bottom of the radiation fins. The base is fixed to the heat sink, and the base includes a plurality of presser teeth that are provided at intervals in the longitudinal direction of the base and press the wave bottom of the heat radiating fin toward the heat sink. The number of members that mechanically fix the base of the fixture to the heat dissipation plate is smaller than the number of protrusions in Patent Document 1 because it is mechanically fixed to the heat dissipation plate at a location that is smaller than the number of wave bottom portions of the heat dissipation fins. Less. Therefore, the work of attaching the heat radiating fins to the heat radiating plate is simplified as compared with the heat radiating device described in Patent Document 1. According to the heat radiating device of 2) above, the wave fin portion of the radiating fin is connected to the holding tooth portion of the fixture. And the support surface of the heat radiating plate can be securely sandwiched, so that the radiating fins are firmly attached to the heat radiating plate.

  According to the radiator of 3) above, since the holding margin for the wave bottom portion of the radiating fin is provided at the tip side portion of the pressing tooth portion of the fixture, the wave bottom portion of the radiating fin is pressed by the pressing tooth portion. In this state, the wave bottom portion of the radiating fin can be more securely sandwiched between the pressing tooth portion of the fixture and the support surface of the radiating plate. Therefore, the attachment of the radiating fins to the radiating plate is further strengthened.

  According to the radiator of the above 4), a pressing margin for the wave bottom portion of the radiating fin is provided on the tip side portion of the holding tooth portion of the fixture, and when the wave bottom portion of the radiating fin is pressed, Since the tooth part is deformed and easily adheres to the wave bottom part, the wave bottom part of the radiating fin is supported by the holding tooth part of the fixture and the support surface of the heat radiating plate in the state after pressing the wave bottom part of the radiating fin by the pressing tooth part. And more reliably. Therefore, the attachment of the radiating fins to the radiating plate is further strengthened.

  According to the radiator of 5) above, since the wave bottom portion of the radiating fin can be securely sandwiched between the pressing protrusion of the holding tooth portion of the fixture and the support surface of the radiating plate, the radiating fin to the radiating plate The mounting of becomes stronger.

  According to the radiator of 6) above, since the pressing allowance for the wave bottom portion of the radiating fin is provided at the pressing projection portion of the pressing tooth portion of the fixture, the wave ridge portion of the radiating fin is pressed by the pressing tooth portion. After that, the wave bottom portion of the radiating fin can be more securely sandwiched between the pressing protrusion of the pressing tooth portion of the fixture and the support surface of the radiating plate. Therefore, the attachment of the radiating fins to the radiating plate is further strengthened.

It is a horizontal sectional view showing a radiator of this invention. It is the figure which looked at the heat radiator of FIG. 1 from the front. It is a disassembled perspective view which shows the heat sink, the radiation fin, and the heat generating body of the heat radiator shown in FIG. It is an AA line expanded sectional view of FIG. It is the elements on larger scale of FIG. It is a figure equivalent to FIG. 4 which shows other embodiment of the heat radiator of this invention. It is the elements on larger scale of FIG. It is a figure which shows the 1st modification of a fixture, (a) shows the state before attaching to a heat sink, (b) shows the state after attaching to a heat sink and pressing down the wave bottom part of a heat sink. . It is a figure which shows the 2nd modification of a fixture, (a) shows the state before attaching to a heat sink, (b) shows the state after attaching to a heat sink and pressing the wave bottom part of a heat sink fin. . It is a figure of the state before attaching to the heat sink which shows the 3rd modification of a fixture. It is a figure of the state before attaching to the heat sink which shows the 4th modification of a fixture.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the upper side in FIG. 1 is referred to as the front, the lower side is referred to as the rear, and the upper and lower sides and the left and right sides in FIG. In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  Moreover, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

  1 to 3 show the overall configuration of the radiator of the present invention, and FIGS. 4 and 5 show the configuration of the main part thereof.

  1 to 3, the radiator (1) is a corrugate on the front side of an aluminum vertical radiator plate (2) having a heat receiving part (3) and a heat radiating part (4) connected to the heat receiving part (3). The aluminum radiating fin (5) is attached by two comb-shaped aluminum fixtures (6).

  The heat receiving part (3) of the heat radiating plate (2) is provided at the center in the left-right direction below the heat radiating plate (2), and the heat radiating part (4) is located on both the left and right sides and the upper side of the heat receiving part (3). It is provided to surround. Although the detailed illustration is omitted, the heat radiating plate (2) is composed of two aluminum plates bonded to each other, and the heat receiving portion (3) is interposed between the two aluminum plates by causing the rear aluminum plate to bulge backward. A hollow grid-like hydraulic fluid sealing circuit (7) straddling the heat radiating section (4) is formed. The front surface of the heat sink (2) is a flat surface. The bulging top surface of the hydraulic fluid sealing circuit (7) is a flat surface. Then, the working fluid (not shown) is enclosed in the working fluid sealing circuit (7) of the heat sink (2), so that the heat sink (2) reaches the heat sink (4) from the heat receiving portion (3). A heat pipe portion (8) is formed. The heat pipe portion (8) has a first portion (8a) existing in the heat receiving portion (3) of the heat radiating plate (2) and a second portion (8b) also existing in the heat radiating portion (4). Yes. In addition, a plurality of through holes (9) are formed in the left and right sides of the heat pipe (8) of the heat radiating plate (2) at intervals in the left-right direction. The number of through-holes (9) on both the upper and lower sides is smaller than the number of wave bottoms (5b) described later of the radiating fins (5).

  The heat sink (2) is printed on a required pattern on at least one of the two aluminum plate mating surfaces, and in this state, the two aluminum plates (2) are pressure-bonded. It is manufactured by a so-called roll bond method in which a laminated plate having a non-crimped portion is formed and a hydraulic fluid sealing circuit (7) is formed at a time by introducing fluid pressure into the non-crimped portion of the laminated plate. The non-crimping part of the laminating plate is composed of a non-crimping part for the hydraulic fluid sealing circuit having a shape corresponding to the hydraulic fluid sealing circuit (7), and a non-crimping part for introducing fluid pressure from the non-crimping part for the hydraulic fluid sealing circuit to the periphery of the laminating board. It consists of a crimping part. When fluid pressure is introduced from the non-crimping part for introducing fluid pressure to form the hydraulic fluid sealing circuit (7), one end of the non-crimping part for fluid pressure introduction is connected to the hydraulic fluid sealing circuit (7) and the other end is aligned. It becomes the hydraulic fluid injection | pouring part opened to the peripheral edge of the board. The hydraulic fluid injection part is sealed after the hydraulic fluid is injected.

  The heat radiating plate (2) may be formed by brazing, for example, two aluminum plates having an outward bulging portion for forming the hydraulic fluid sealing circuit (7).

  The radiating fin (5) has a wave crest (5a) extending in the vertical direction, a wave bottom (5b), and a connecting portion (5c) connecting the wave crest (5a) and the wave bottom (5b). The bottom (5b) is attached to the heat radiating plate (2) so as to cover the entire heat pipe portion (8) in a state where the bottom (5b) is supported by the front surface (2a) (supporting surface) of the heat radiating plate (2).

  The fixture (6) includes a base (11) extending in the left-right direction fixed to the heat sink (2) outside the length direction (vertical direction) of the wave bottom (5b) of the radiating fin, and a base (11) The base (11) is spaced apart in the longitudinal direction and protrudes inward in the vertical direction, and the wave bottom (5b) of the radiating fin (5) is pressed against the front (2a) side of the radiating plate (2). It consists of a plurality of presser teeth (12).

  The base part (11) has the same number of through holes (9) as the number of through holes (9) on both the upper and lower sides of the heat sink (2), that is, the number of through holes (13) smaller than the wave bottom part (5b) of the heat dissipating fin (5), It is formed at intervals in the left-right direction. And by screwing a nut (15) into the tip of the male screw (14) passed from the front through the through hole (13) of the base (11) and the through hole (9) of the heat sink (2), the base (11) is fixed to the heat sink (2).

  As shown in FIGS. 4 and 5, the surface (rear surface) of the base (11) of the fixture (6) facing the heat sink (2) side extends over the entire width of the base (11) in the vertical direction. A projecting portion (16) projecting toward the heat radiating plate (2) from the rear surface of the portion (12) is provided over the entire length. Although not shown, the rear surface (17) of the presser tooth portion (12) of the fixture (6) is the front surface of the heat radiating plate (2) in the state before the wave bottom portion (5b) of the radiating fin (5) is pressed. (2a), that is, a flat surface parallel to the support surface for supporting the wave bottom portion (5b) of the radiating fin (5) in the radiating plate (2). The front surface (2a) of the heat radiating plate (2) in the protruding portion (16) with respect to the rear surface (17) of the presser tooth portion (12) in a state before pressing the wave bottom portion (5b) of the radiating fin (5), that is, the protruding portion The protruding height to the tip of (16) is below the lower limit of the allowable limit of the thickness of the heat dissipating fin (5). In the state after pressing the wave bottom (5b) of the radiating fin (5), the presser teeth (12) may be slightly deformed and the rear surface (17) may not become a flat surface. Even in the case, the protrusion height (H) to the front surface (2a) of the heat sink (2) in the protrusion (16) of the base (11) with respect to at least the base (11) side end portion of the entire rear surface (17) is It becomes below the lower limit of the allowable limit of the thickness of the heat dissipating fin (5). And the upper and lower ends of all wave bottoms (5b) of the radiating fin (5) are clamped by the presser teeth (12) of the two fixtures (6) and the front surface (2a) of the radiating plate (2). Thus, the radiating fin (5) is attached to the radiating plate (2) by the fixture (6).

  In the radiator (1) described above, a heating element (P) made of, for example, an electronic component is brought into thermal contact with the heat receiving portion (3) of the radiator plate (2). The heat generated from the heating element (P) is transmitted to the first portion (8a) of the heat pipe portion (8) of the heat radiating plate (2), and the working fluid evaporates. The evaporated gas-phase hydraulic fluid reaches the entire second part (8b) of the heat pipe portion (8), and the heat of the gas-phase hydraulic fluid passes through the heat-radiating portion (4) of the heat radiating plate (2) and is radiated fin. It is transmitted to (5). The heat of the gas-phase hydraulic fluid transmitted to the radiating fin (5) is dissipated from the radiating fin (5) to the air flowing in the vertical direction between the adjacent connecting portions (5c), and the gas-phase hydraulic fluid is condensed to the liquid phase. And return to the first portion (8a) of the heat pipe portion (8). By repeating such an operation, heat generated from the heating element (P) is dissipated.

  Although illustration is omitted, an aluminum heat receiving plate may be fixed to the rear surface of the heat receiving portion (3) of the heat radiating plate (2), and the heating element (P) may be brought into thermal contact with the heat receiving plate. In this case, the heat generated from the heating element (P) is transmitted to the first portion (8a) of the heat pipe portion (8) of the heat radiating plate (2) through the heat receiving plate. The heat receiving plate performs the following functions. That is, since the thickness of the heat sink (2) is usually thin, high flatness may not be obtained. When the heating element (P) is attached to the side of the heat sink (2) where the hydraulic fluid sealing circuit (7) swells, the part of the heating element (P) that is not in contact with the heat sink (2) As a result, the temperature rises locally in the part. The heat receiving plate functions to increase the flatness of the part where the heating element (P) contacts, and heat is generated by spreading the heat generated from the heating element (P) to the entire heat receiving plate and then transferring it to the heat radiating plate (2). It works to suppress local temperature rise of the body (P).

  6 and 7 show another embodiment of the radiator.

  In the case of the radiator shown in FIGS. 6 and 7, the same radiator plate (2) as that of the embodiment shown in FIGS. Therefore, the hollow grid-like hydraulic fluid sealing circuit (7) straddling the heat receiving portion (3) and the heat radiating portion (4) of the heat radiating plate (2) bulges forward.

  The radiating fin (5) covers the entire heat pipe (8) with the wave bottom (5b) supported by the flat bulging top surface (7a) (support surface) of the hydraulic fluid sealing circuit (7). Thus, it is attached to the front surface of the heat sink (2) by the fixture (20).

  It is provided over the entire length of the base (11) on the rear surface of the base (11) of the fixture (20), and extends over the entire width of the base (11) in the vertical direction and more than the rear surface of the presser tooth portion (12) (2 The protruding portion (21) protruding toward the) side is higher by the bulging height of the hydraulic fluid sealing circuit (7) than in the case of the fixture (6) shown in FIGS.

  Although not shown, the rear surface (17) of the presser tooth portion (12) of the fixture (6) is in the state before the wave bottom portion (5b) of the radiating fin (5) is pressed. The bulging top surface (7a) of the liquid sealing circuit (7), that is, a flat surface parallel to the support surface for supporting the wave bottom (5b) of the radiating fin (5) in the radiating plate (2). In a state before the wave bottom part (5b) of the heat dissipating fin (5) is pressed, the expansion of the hydraulic fluid sealing circuit (7) at the protruding part (21) of the base part (11) with respect to the rear surface (17) of the pressing tooth part (12) The protruding height to the top surface (7a) is not more than the lower limit of the allowable limit of the thickness of the radiating fin (5). In the state after pressing the wave bottom (5b) of the radiating fin (5), the presser teeth (12) may be slightly deformed and the rear surface (17) may not become a flat surface. Even in the case, the protrusion height to the bulging top surface (7a) of the hydraulic fluid sealing circuit (7) in the protrusion (21) of the base (11) with respect to at least the base (11) side end of the entire rear surface (17) (H) is equal to or less than the lower limit of the allowable limit of the thickness of the radiating fin (5). And the upper and lower ends of all wave bottoms (5b) of the radiating fin (5) are connected to the presser teeth (12) of the two fixtures (6) and the hydraulic fluid sealing circuit (7) of the radiating plate (2). The heat sink fin (5) is attached to the heat radiating plate (2) by the fixture (6).

  Other configurations are the same as those of the radiator (1) shown in FIGS.

  FIG. 8 shows a first modification of the fixture.

  The rear surface (26) of the presser tooth portion (12) of the fixture (25) shown in FIG. 8 is directed from the base (11) side to the tip before pressing the wave bottom portion (5b) of the radiating fin (5). The slope is inclined to the rear side. In the state before pressing the wave bottom part (5b) of the radiating fin (5), in the protruding part (16) of the base part (11) with respect to the end part on the base part (11) side of the rear surface (26) of the pressing tooth part (12) The protrusion height (H1) to the front surface (2a) of the heat radiating plate (2) is below the lower limit of the allowable limit of the thickness of the radiating fin (5) (see FIG. 8 (a)). In the state after pressing the wave bottom (5b) of the radiating fin (5), the presser teeth (12) are slightly deformed, but even in this case, the rear surface (26) on the base (11) side The protrusion height of the protrusion (16) with respect to the end to the front surface (2a) of the heat radiating plate (2) is not more than the lower limit of the allowable limit of the thickness of the heat radiating fin (5).

  As a result, since the holding margin for the wave bottom part (5b) of the radiating fin (5) is provided at the tip side portion of the holding tooth part (12) of the fixture (25), all the waves of the radiating fin (5) are provided. The bottom (5b) is securely clamped between the presser teeth (12) of the two fixtures (25) and the front surface (2a) of the radiator plate (2), so that the radiating fins (5) are attached to the fixture ( 25) and is more firmly attached to the heat sink (2).

  Other configurations are the same as those of the radiator (1) fixture (6) shown in FIGS.

  FIG. 9 shows a second modification of the fixture.

  By providing a recess (31) on the rear surface of the presser tooth portion (12) at the end of the presser tooth portion (12) of the fixture (30) shown in FIG. A thin deformation portion (32) is provided. The rear surface (33) of the presser tooth portion (12) of the fixture (30) is in the state before the wave bottom portion (5b) of the radiating fin (5) is pressed on the tip side of the deformable portion (32). 11) It is an inclined surface inclined rearward from the side toward the tip. In the state before pressing the wave bottom part (5b) of the radiating fin (5), the heat sink (2) in the protruding part (16) with respect to the end part on the recessed part (31) side of the rear surface (33) of the pressing tooth part (12) The protrusion height (H2) to the front surface (2a) of the heat sink is equal to or less than the lower limit of the allowable limit of the thickness of the heat dissipating fin (5) (see FIG. 9 (a)). In addition, in the state after pressing the wave bottom part (5b) of the radiating fin (5), the pressing tooth part (12) is slightly deformed, but even in this case, the base part (11) side of the rear surface (33) The protrusion height of the protrusion (16) with respect to the end to the front surface (2a) of the heat radiating plate (2) is not more than the lower limit of the allowable limit of the thickness of the heat radiating fin (5).

  As a result, a holding margin for the wave bottom part (5b) of the radiating fin (5) is provided on the tip side portion of the holding tooth part (12) of the fixture (30), and the wave bottom part of the radiating fin (5) ( When pressing 5b), the presser tooth portion (12) is deformed at the deformed portion (32) and is easily brought into close contact with the wave bottom portion (5b), and all the wave bottom portions (5b) of the radiating fin (5) are 2 The fixing teeth (12) of the two fixtures (30) and the front surface (2a) of the heat sink (2) are securely clamped, so that the heat dissipating fins (5) are attached to the heat sink (2 ).

  Note that the deformed portion (32) thinner than the other portion formed at the end on the base (11) side of the presser tooth portion (12) of the fixture (30) is on the front surface of the presser tooth portion (12). You may form by providing a recessed part.

  Other configurations are the same as those of the radiator (1) fixture (6) shown in FIGS.

  FIG. 10 shows a third modification of the fixture.

  The protrusion (12) of the fixture (40) shown in FIG. 10 is protruded from the heat sink (2) side (rear side) and the wave bottom (5b) of the heat sink (5) is connected to the heat sink (2 ) Side is provided with a pressing projection (41). The front end surface of the pressing protrusion (41) is a flat surface parallel to the front surface (2a) of the heat radiating plate (2) before the wave bottom portion (5b) of the heat radiating fin (5) is pressed. In addition, the rear surface (42) of the portion closer to the base (11) than the pressing protrusion (41) in the presser tooth portion (12) is in a state before the wave bottom portion (5b) of the radiating fin (5) is pressed. The front surface (2a) of (2), that is, a flat surface parallel to the support surface for supporting the wave bottom (5b) of the heat radiation fin (5) in the heat radiation plate (2), and in this state, the rear surface (42 ) To the front surface (2a) of the heat radiating plate (2) in the projecting portion (16) is equal to or greater than the upper limit of the allowable limit of the thickness of the radiating fin (5).

  And in the state before pressing the wave bottom part (5b) of the radiating fin (5) by the pressing protrusion (41), the heat sink (2) of the protrusion (16) with respect to the rear surface (42) of the pressing tooth part (12) The protruding height to the front surface (2a), that is, the protruding height to the tip of the protruding portion (16) is also higher than the protruding height of the pressing protrusion (41) to the rear surface (42), and the pressing tooth portion (12) The difference between the protruding height of the heat sink (2) to the front surface (2a) at the protruding portion (16) with respect to the rear surface (42) and the protruding height of the pressing protrusion (41) with respect to the rear surface (42) (H3 ) Is below the lower limit of the allowable limit of the thickness of the heat dissipating fin (5).

  As a result, a pressing margin for the wave bottom portion (5b) of the radiating fin (5) is provided on the tip side portion of the pressing tooth portion (12) of the fixture (40), and the wave bottom portion of the radiating fin (5) ( When pressing 5b), the presser tooth part (12) is deformed at the base (11) side of the pressing protrusion (41) and becomes easier to adhere to the wave bottom part (5b). The wave bottom (5b) is securely clamped between the pressing protrusions (41) of the presser teeth (12) of the two fixtures (40) and the front surface (2a) of the heat sink (2). The fin (5) is more firmly attached to the heat radiating plate (2) by the fixture (40).

  Other configurations are the same as those of the radiator (1) fixture (6) shown in FIGS.

  FIG. 11 shows a fourth modification of the fixture.

  The pressing protrusion (46) formed at the tip of the pressing tooth portion (12) of the fixture (45) shown in FIG. 11 and pressing the wave bottom portion (5b) of the radiating fin (5) has a partial spherical shape.

  In the state before pressing the wave bottom (5b) of the radiating fin (5) by the pressing protrusion (46), the front surface of the radiating plate (2) in the protruding portion (16) with respect to the rear surface (42) of the pressing tooth portion (12) ( The difference (H4) between the protrusion height to 2a), that is, the protrusion height to the tip of the protrusion (16) and the protrusion height of the pressing protrusion (46) with respect to the rear surface (42) is the same as that of the radiating fin (5). It is below the lower limit of the allowable limit of thickness.

  Other configurations are the same as those of the fixture (40) shown in FIG.

  As shown in FIGS. 6 and 7, in the fixture (35) shown in FIGS. 8 to 11, the wave bottoms (5b) and (5b) of the radiating fins (5) are bulged from the hydraulic fluid sealing circuit (7). It can also be used when attached to the front surface of the heat radiating plate (2) so as to cover the entire heat pipe portion (8) while being in contact with the surface (7a).

  In this case, it is provided over the entire length of the base (11) on the rear surface of the base (11) of the fixture (25) (30) (40) (45), and extends over the entire width of the base (11) in the vertical direction. (12) The protruding portion protruding from the rear surface to the heat radiating plate (2) side is higher than the swelled height of the hydraulic fluid sealing circuit (7) as compared with the case of the fixture (6) shown in FIGS. It gets higher by the minute.

  The radiator according to the present invention is suitably used for radiating heat generated from a heating element such as an electronic component.

(1): radiator
(2): Heat sink
(2a): Front (support surface)
(5): Radiating fin
(5a): Wave peak
(5b): Wave bottom
(5c): Connection part
(6) (20) (25) (30) (40) (45): Fitting
(7a): Swelling top surface (support surface) of hydraulic fluid sealing circuit
(11): Base
(12): Presser teeth
(14): Male thread
(15): Nut
(16) (21): Protruding part
(17) (26) (33): Rear surface (surface on the heat sink side of the presser teeth)
(31): Recess
(32): Deformation part
(41) (46): Pressing protrusion
(42): Rear surface (surface on the heat sink side of the presser teeth)

Claims (6)

It has a corrugated radiating fin attached to the heat radiating plate and having a wave crest portion, a wave bottom portion, and a connecting portion that connects the wave crest portion and the wave bottom portion, and the wave bottom portion is in contact with the heat radiating plate. In the radiator,
The radiating fins are attached to the radiating plate by two comb-like fixtures, and each fixture is fixed to the radiating plate on the outer side in the length direction of the wave bottom portion of the radiating fins, The heat sink is provided with a plurality of presser teeth that are spaced apart in the longitudinal direction and press the wave bottom of the radiating fin toward the heat radiating plate, and radiates heat at a place where the base of the fixture is less than the number of wave undulated portions of the radiating fin. A radiator that is mechanically fixed to a plate. The wave-fin part of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture is closer to the radiating plate than the surface of the presser teeth on the radiating plate side In the state before the wave bottom portion of the radiating fin is pressed, the surface on the heat radiating plate side of the pressing tooth portion is a flat surface parallel to the support surface of the radiating plate and The radiator according to claim 1, wherein a projecting height of the projecting portion of the base portion relative to the surface to the support surface of the heat radiating plate is equal to or less than a lower limit value of an allowable limit of a thickness of the radiating fin. The wave-fin part of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture is closer to the radiating plate than the surface of the presser teeth on the radiating plate side In the state before the wave bottom part of the radiating fin is pressed, the surface on the side of the radiating plate of the pressing tooth portion becomes an inclined surface inclined toward the radiating plate side from the base side toward the tip. 2. The heat dissipation according to claim 1, wherein the protrusion height of the base protrusion relative to the base end of the inclined surface to the support surface of the heat sink is equal to or less than the lower limit of the allowable limit of the thickness of the heat dissipation fin. vessel. The wave-fin part of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture is closer to the radiating plate than the surface of the presser teeth on the radiating plate side By forming a recess on the heat sink side surface of the presser teeth at the end of the presser teeth on the base side, a deformed part thinner than the other parts is provided. In the state before pressing the wave bottom portion of the heat radiating fin, the portion excluding the concave portion on the surface on the heat radiating plate side of the presser tooth portion is an inclined surface inclined toward the heat radiating plate side from the concave portion side toward the tip. The radiator according to claim 1, wherein the protrusion height of the base protrusion relative to the recess-side end portion of the inclined surface to the support surface of the heat sink is equal to or less than the lower limit of the allowable limit of the thickness of the heat dissipation fin. . The wave-fin part of the radiating fin is supported by the presser teeth of the fixture while being supported by the support surface of the radiating plate, and the base of the fixture is closer to the radiating plate than the surface of the presser teeth on the radiating plate side Before the presser teeth are pressed on the tip of the presser teeth, which protrudes toward the heat sink and presses the wave bottom of the radiating fin. In this state, the protrusion height of the base protrusion relative to the heat sink side surface of the presser tooth portion to the support surface of the heat sink plate is equal to or higher than the protrusion height of the pressing protrusion with respect to the heat sink side surface of the presser tooth portion. The heat radiator according to claim 1. In the state before pressing the wave bottom part of the radiating fin by the pressing projection, the protrusion height of the base protrusion relative to the surface of the radiating plate to the support surface of the radiating plate with respect to the surface of the radiating plate in the pressing tooth part, The radiator according to claim 5, wherein a difference between the protrusion height of the pressing protrusion with respect to the support surface of the radiator plate is equal to or less than a lower limit value of an allowable limit of the thickness of the radiator fin.

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