Heat dissipation body and box-shaped body

Abstract

A heat sink radiating heat generated by the heat source, the heat sink including: a base to which the heat is transferred; the radiating fins are arranged on the base part; and a wall disposed on the base and adjacent to the fins in a direction in which the fins extend. The wall has a through hole that opens in a wall surface facing the heat sink in the direction and penetrates the wall.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a heat sink that radiates heat generated by a radiation heat source, and a box-shaped body including the heat sink as at least a portion of an outer wall. BACKGROUND

[0002] An electrical junction box mounted on a vehicle or the like has been proposed in the related art. For example, the electrical junction box in the related art accommodates electronic components, bus bars, and the like in an inner space thereof to prevent accidental contact with the electronic components and the like (see, for example, JP 2013-240217 A).

[0003] The electrical junction box of the above-described type can include a heat sink for radiating heat generated by the electronic components during operation to the outside. However, when, for example, a power input terminal for electrically connecting the inside and the outside of the electrical junction box for power supply is provided in the vicinity of the heat sink, the power input terminal itself or a seat portion that fixes the power input terminal obstructs the flow of air along the heat sink, which can impair the heat dissipation performance of the electrical junction box. From the viewpoint of proper operation of the electrical junction box, it is desirable to improve the heat dissipation performance of the electrical junction box.

[0004] As can be understood from the above description, it is desirable to improve the heat dissipation performance not only in the electrical junction box but also in a box-shaped body that is capable of accommodating a heat source in an inner space. For these reasons, there is a need for a heat sink that has excellent heat dissipation performance and that can be applied to a box-shaped body. SUMMARY

[0005] An object of the present disclosure is to provide a heat sink having excellent heat dissipation performance and a box-shaped body including the heat sink.

[0006] To achieve the above object, a heat sink and a box-shaped body according to the present disclosure have the following features.

[0007] According to an aspect of the present disclosure, there is provided a heat sink that radiates heat generated by a heat source, the heat sink including: a base to which heat is transferred; a heat sink fin provided on the base; and a wall provided on the base and adjacent to the heat sink fin in a direction in which the heat sink fin extends, wherein the wall has a through-hole that is open in a face of the wall that faces the heat sink fin in the direction and penetrates the wall.

[0008] According to another aspect of the present disclosure, there is provided a box-shaped body for accommodating a heat source in an inner space, the box-shaped body including: a heat sink as at least a portion of an outer wall of the box-shaped body.

[0009] The heat sink according to the present disclosure has a wall adjacent to the fins in the direction in which the fins extend, and the wall has a through-hole that is opened on a wall surface facing the fins and penetrates the wall. Therefore, even when the wall is present in the vicinity of the fins, air flowing along the fins can pass through the through-hole of the wall, and thus the flow of air is less likely to be hindered by the wall. Therefore, for example, even when a wall for fixing a seat portion of a power input terminal or the like is integrally provided on the base portion in close contact with the fins, heat can be effectively dissipated from the fins. Thus, the heat sink according to the present disclosure has excellent heat dissipation performance.

[0010] The box-shaped body according to the present disclosure has a heat sink provided as at least a portion of an outer wall of the box-shaped body. Therefore, heat generated by a heat source inside the box-shaped body can be effectively radiated to the outside of the box-shaped body. Thus, the box-shaped body according to the present disclosure has excellent heat dissipation performance.

[0011] The present disclosure has been described briefly above. Furthermore, the details of the present disclosure will be clarified by reading the modes of carrying out the present invention described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present disclosure will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not intended to be limiting of the present disclosure, wherein:

[0013] Figure 1 is a perspective view showing a box-shaped body according to an embodiment of the present disclosure;

[0014] Figure 2 is a perspective view of the box-shaped body in Figure 1 from a rear side;

[0015] Figure 3 is an exploded perspective view of the box-shaped body in Figure 1 ;

[0016] Figure 4 is a plan view of an enlarged portion A in Figure 3 ; and

[0017] Figure 5 is a perspective view of a periphery of a seat portion and a bolt attachment portion included in portion A in Figure 3 when viewed obliquely from a rear lower side. DETAILED DESCRIPTION

[0018] EMBODIMENT

[0019] Hereinafter, a box-shaped body 1 according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. The box-shaped body 1 accommodates various electronic components, such as relays and fuses therein, and thus the box-shaped body 1 can also be referred to as an electronic component unit or an electrical junction box.

[0020] As shown in Figures 1 to 3As shown, the box-shaped body 1 includes a circuit board 10, a cover 20, and a housing 30, the cover 20 and the housing 30 sandwiching the circuit board 10 vertically and defining an accommodation space for accommodating the circuit board 10. The box-shaped body 1 is generally attached to an instrument panel that separates an engine room of a vehicle and an interior (cabin) of the vehicle, and is used in a state where the cover 20 is exposed to the engine room of the vehicle. The housing 30 corresponds to the "housing" in the present disclosure. The cover 20 corresponds to the "cover" in the present disclosure.

[0021] Hereinafter, for the sake of description, the definitions of "front", "rear", "upper", "lower", "left", "right", "front-rear direction", "up-down direction", and "left-right direction" are as shown in the drawing. Figure 1 The "front-rear direction", "up-down direction", and "left-right direction" are orthogonal to each other. The up-down direction corresponds to the "direction in which the fins extend" in the present disclosure, and the left-right direction corresponds to the "direction intersecting the direction in which the fins extend" in the present disclosure. As will be described later, from the viewpoint of smoothly flowing air along the fins 37 when the box-shaped body 1 is mounted on a vehicle or the like, the up-down direction of the vehicle or the like preferably coincides with the "up-down direction" in the present example when the box-shaped body 1 is mounted on the vehicle or the like. However, the "up-down direction" in the present example does not necessarily correspond to the up-down direction of the vehicle or the like when the box-shaped body 1 is mounted on the vehicle or the like. Hereinafter, the components constituting the box-shaped body 1 will be described.

[0022] First, the circuit board 10 will be described. The circuit board 10 is, for example, a printed circuit board (PCB) on which various electronic components (not shown) such as relays and fuses are mounted, and has a rectangular flat plate shape in the present example, as shown in Figure 3

[0023] Next, the cover 20 will be described. The cover 20 is a resin molded body, and has a substantially rectangular flat plate shape as shown in Figure 3 The cover 20 constitutes a part of the outer wall of the box-shaped body 1. Connectors 21 including tubular portions extending forward (toward the outside of the box-shaped body 1) are provided at each of a plurality of positions on the front surface (a surface exposed to the outside of the box-shaped body 1) of the cover 20. Each of the connectors 21 accommodates a metal terminal (not shown) electrically connected to a corresponding electronic component mounted on the circuit board 10. Each of the connectors 21 is fitted to a counterpart connector (not shown) connected to one end of an electric wire extending from a device (not shown) outside the box-shaped body 1. Thus, each of the connectors 21 has a function of electrically connecting the electronic component mounted on the circuit board 10 inside the box-shaped body 1 and the device outside the box-shaped body 1. Each of the connectors 21 can be fitted to the counterpart connector in a watertight manner, and has a waterproof function of preventing water from entering from the outside when fitted to the counterpart connector. The cover 20 is provided with a bolt insertion hole 22 extending in the plate thickness direction (front-rear direction) of the cover 20 at each of the four corners of the outer peripheral edge thereof.

[0024] ​Next, the housing 30 will be described. The housing 30 is made of metal (more specifically, die-cast aluminum) and also functions as a so-called heat sink that absorbs heat generated from various electronic components mounted on the circuit board 10 and releases the heat to the outside. In this example, Figure 3 As shown, the housing 30 integrally includes a peripheral wall 31 and a bottom wall 32. The peripheral wall 31 has a generally rectangular tubular shape extending in the front-to-back direction, and the bottom wall 32 has a generally rectangular flat plate shape that blocks the rear end opening of the peripheral wall 31. The housing 30 has a generally rectangular box shape with an open front end. The housing 30 (= peripheral wall 31 + bottom wall 32) constitutes a portion of the outer wall of the box-shaped body 1. The circuit board 10 is placed on the inner surface (front face) of the bottom wall 32 and secured thereto by means of fastening or the like. Here, the housing 30 corresponds to the "heat sink" of the present disclosure, and the bottom wall 32 corresponds to the "base" of the present disclosure.

[0025] The peripheral wall 31 is formed with a substantially rectangular annular groove 33 on a substantially rectangular frame-shaped end surface on the opening side (front side) thereof. The groove 33 is recessed rearward and extends over the entire periphery of the peripheral wall 31 in the circumferential direction. A sealing material (liquid gasket, etc.) is injected into the groove 33. Figure 2 As shown in FIG. 1 , the housing 30 is provided with bolt attachment portions 34 on the peripheral wall 31 and bottom wall 32 at each of the four corners of the outer peripheral edge of the housing 30. The bolt attachment portions 34 have a profile that protrudes from the bottom wall 32 toward the rear side (outside the box-shaped body 1). The bolt attachment portions 34 correspond to each of the four bolt insertion holes 22 of the cover 20. The bolt attachment portions 34 have internal threads that open toward the front side (toward the cover 20). The cover 20 is placed on the end surface of the opening side of the peripheral wall 31 to block the front end opening of the housing 30 and is secured to the housing 30 by screwing bolts (not shown) inserted into the bolt insertion holes 22 into the internal threads of the corresponding bolt attachment portions 34. When the cover 20 is assembled to the housing 30, the sealing material injected into the grooves 33 seals the gap between the outer peripheral edges of the cover 20 and the housing 30, which are fixed to each other, thereby preventing water from entering the box-shaped body 1 from the outside. Hereinafter, for convenience of description, one of the four bolt attachment portions 34 located at the upper right corner of the housing 30 is referred to as a "bolt attachment portion 34a," and one located at the upper left corner of the housing 30 is referred to as a "bolt attachment portion 34b." The bolt attachment portions 34 can also serve as a location for attaching a clamp (so-called bracket) used to mount the box-shaped body 1 on a vehicle or the like.

[0026] like Figure 2As shown in FIG. 1, the housing 30 is provided with a seat portion 35 having an outer shape protruding from the bottom wall 32 toward the rear side (the outside of the box-shaped body 1) at a position near the left side of the bolt attachment portion 34a on the upper edge extending in the left-right direction on the peripheral wall 31 and the bottom wall 32. A power input terminal 36 electrically connected to various electronic components mounted on the circuit board 10 is fixed to the seat portion 35. A mating terminal (not shown) provided at the end portion of an electric wire extending from a power source (not shown) outside the box-shaped body 1 is connected to the power input terminal 36. Thus, electric power supplied from the power source is supplied to the various electronic components mounted on the circuit board 10 through the power input terminal 36. Here, the bolt attachment portions 34a and 34b correspond to the "wall" and the "attachment portion" of the present disclosure, and the seat portion 35 corresponds to the "wall" and the "seat portion" of the present disclosure.

[0027] As shown in FIG. 1, the housing 30 is provided with a seat portion 35 having an outer shape protruding from the bottom wall 32 toward the rear side (the outside of the box-shaped body 1) at a position near the left side of the bolt attachment portion 34a on the upper edge extending in the left-right direction on the peripheral wall 31 and the bottom wall 32. A power input terminal 36 electrically connected to various electronic components mounted on the circuit board 10 is fixed to the seat portion 35. A mating terminal (not shown) provided at the end portion of an electric wire extending from a power source (not shown) outside the box-shaped body 1 is connected to the power input terminal 36. Thus, electric power supplied from the power source is supplied to the various electronic components mounted on the circuit board 10 through the power input terminal 36. Here, the bolt attachment portions 34a and 34b correspond to the "wall" and the "attachment portion" of the present disclosure, and the seat portion 35 corresponds to the "wall" and the "seat portion" of the present disclosure. Figure 2 As shown in FIG. 1, the housing 30 is provided with a seat portion 35 having an outer shape protruding from the bottom wall 32 toward the rear side (the outside of the box-shaped body 1) at a position near the left side of the bolt attachment portion 34a on the upper edge extending in the left-right direction on the peripheral wall 31 and the bottom wall 32. A power input terminal 36 electrically connected to various electronic components mounted on the circuit board 10 is fixed to the seat portion 35. A mating terminal (not shown) provided at the end portion of an electric wire extending from a power source (not shown) outside the box-shaped body 1 is connected to the power input terminal 36. Thus, electric power supplied from the power source is supplied to the various electronic components mounted on the circuit board 10 through the power input terminal 36. Here, the bolt attachment portions 34a and 34b correspond to the "wall" and the "attachment portion" of the present disclosure, and the seat portion 35 corresponds to the "wall" and the "seat portion" of the present disclosure.

[0028] Figure 2 Hereinafter, for the sake of description, two or more (seven in this example) of the heat dissipation fins 37 located below the seat portion 35 protruding from the upper edge of the bottom wall 32 toward the outside and adjacent (opposite) to the lower surface of the seat portion 35 in the up-down direction are referred to as "heat dissipation fins 37a" (see FIG. 1). Figure 5 Figure 2 Hereinafter, for the sake of description, two or more (three in this example) of the heat dissipation fins 37 located below the bolt attachment portion 34a protruding from the upper edge of the bottom wall 32 toward the outside and adjacent (facing) to the lower surface of the bolt attachment portion 34a in the up-down direction are referred to as "heat dissipation fins 37b" (see FIG. 1). Figure 5 Figure 2 Hereinafter, for the sake of description, two or more (three in this example) of the heat dissipation fins 37 located below the bolt attachment portion 34b protruding from the upper edge of the bottom wall 32 toward the outside and adjacent (facing) to the lower surface of the bolt attachment portion 34b in the up-down direction are referred to as "heat dissipation fins 37c" (see FIG. 1).

[0029] As shown in FIG. 1, the housing 30 is provided with a seat portion 35 having an outer shape protruding from the bottom wall 32 toward the rear side (the outside of the box-shaped body 1) at a position near the left side of the bolt attachment portion 34a on the upper edge extending in the left-right direction on the peripheral wall 31 and the bottom wall 32. A power input terminal 36 electrically connected to various electronic components mounted on the circuit board 10 is fixed to the seat portion 35. A mating terminal (not shown) provided at the end portion of an electric wire extending from a power source (not shown) outside the box-shaped body 1 is connected to the power input terminal 36. Thus, electric power supplied from the power source is supplied to the various electronic components mounted on the circuit board 10 through the power input terminal 36. Here, the bolt attachment portions 34a and 34b correspond to the "wall" and the "attachment portion" of the present disclosure, and the seat portion 35 corresponds to the "wall" and the "seat portion" of the present disclosure. Figure 2 4 ​​​​As shown in FIGS. 5 and 6, the seat portion 35 is provided with a plurality of (four in this example) through-holes 38a that open at the lower surface of the seat portion 35 and penetrate the seat portion 35 in the up-and-down direction at intervals in the left-and-right direction. The four through-holes 38a are arranged so that at least a portion of each lower end opening thereof overlaps the gap between a pair of adjacent fins 37a or two adjacent gaps when viewed from below. In other words, each of the four through-holes 38a opens to the gap between a pair of adjacent fins 37a at a position adjacent to the gap in the up-and-down direction.

[0030] The bolt-attachment portion 34a is provided with one through-hole 38b that opens at its lower surface and penetrates the bolt-attachment portion 34a in the up-and-down direction. At least a portion of the lower end opening of the through-hole 38b overlaps the gap between a pair of adjacent fins 37b when viewed from below. In other words, the through-hole 38b opens to the gap between a pair of adjacent fins 37b at a position adjacent to the gap in the up-and-down direction.

[0031] The bolt-attachment portion 34b is provided with one through-hole 38c that opens at its lower surface and penetrates the bolt-attachment portion 34b in the up-and-down direction (see FIG. 5). Figure 2 ) At least a portion of the lower end opening of the through-hole 38c overlaps the gap between a pair of adjacent fins 37c when viewed from below. In other words, the through-hole 38c opens to the gap between a pair of adjacent fins 37c at a position adjacent to the gap in the up-and-down direction.

[0032] The effects of providing the through-holes 38a, 38b, and 38c in the seat portion 35 and the bolt-attachment portions 34a and 34b will be described below. Heat generated from various electronic components mounted on the circuit board 10 is absorbed by the peripheral wall 31 and the bottom wall 32 of the case 30 serving as a heat sink, and is released to the outside via the outer surfaces of the peripheral wall 31 and the bottom wall 32. At this time, air in the gaps between the plurality of fins 37 receives heat released from the outer surfaces of the bottom wall 32 and the fins 37, thereby having a higher temperature (i.e., a relatively lower density) than the surrounding air, and thus flows upward along the fins 37 extending in the up-and-down direction.

[0033] Among the plurality of fins 37, air (i.e., fins 37 not provided with a protrusion, such as the bolt-attachment portions 34 or the seat portion 35 above) flowing upward through the gaps between the fins 37 other than the fins 37a, 37b, and 37c can move above the bottom wall 32 (i.e., above the box-shaped body 1) without being hindered from flowing upward from the upper ends of the fins 37.

[0034] On the other hand, air flowing upward through the gaps between the fins 37a can be hindered from flowing upward from the upper ends of the fins 37a due to collisions with the seat portion 35 or the like. In this regard, in the present example, four through-holes 38a are formed in the seat portion 35. To this end, as shown in FIG. 5, the four through-holes 38a are arranged so that at least a portion of each lower end opening thereof overlaps the gap between a pair of adjacent fins 37a or two adjacent gaps when viewed from below. In other words, each of the four through-holes 38a opens to the gap between a pair of adjacent fins 37a at a position adjacent to the gap in the up-and-down direction.Figure 5 As shown, the air flowing upward through the gaps between the fins 37a and flowing into the region Sa between the fins 37a and the seat portion 35 can pass upward through the through-holes 38a of the seat portion 35, as indicated by the white arrows in the figure. At this time, as described above, since each of the four through-holes 38a is opened at a position adjacent to the gap between a pair of adjacent fins 37a in the up-down direction, the air flowing into the region Sa can smoothly flow into the through-holes 38a. Therefore, even when the seat portion 35 is present in the vicinity of the upper ends of the fins 37a, it is less likely to hinder the upward flow of air into the region Sa, and thus the heat dissipation performance is less likely to be weakened.

[0035] Similarly, the air flowing upward through the gaps between the fins 37b can be hindered from flowing upward from the upper ends of the fins 37b due to collision with the bolt attachment portion 34a or the like. In this regard, in this example, the through-holes 38b are formed in the bolt attachment portion 34a. For this reason, as shown, the air flowing upward through the gaps between the fins 37b and flowing into the region Sb between the fins 37b and the bolt attachment portion 34a can pass upward through the through-holes 38b of the bolt attachment portion 34a, as indicated by the white arrows in the figure. At this time, as described above, since the through-holes 38b are opened at positions adjacent to the gaps between a pair of adjacent fins 37b in the up-down direction, the air flowing into the region Sb can smoothly flow into the through-holes 38b. Therefore, even when the bolt attachment portion 34a is present in the vicinity of the upper ends of the fins 37b, the upward flow of air flowing into the region Sb is less likely to be hindered, and thus the heat dissipation performance is less likely to be weakened. Figure 5 Similarly, the air flowing upward through the gaps between the fins 37c can be hindered from flowing upward from the upper ends of the fins 37c due to collision with the bolt attachment portion 34b or the like. In this regard, in this example, the through-holes 38c are formed in the bolt attachment portion 34b (see

[0036] ). For this reason, as shown, the air flowing upward through the gaps between the fins 37c and flowing into the region Sc between the fins 37c and the bolt attachment portion 34b (see Figure 2 ) can pass upward through the through-holes 38c of the bolt attachment portion 34b, as indicated by the white arrows in the figure. At this time, as described above, since the through-holes 38c are opened at positions adjacent to the gaps between a pair of adjacent fins 37c in the up-down direction, the air flowing into the region Sc can smoothly flow into the through-holes 38c. Therefore, even when the bolt attachment portion 34b is present in the vicinity of the upper ends of the fins 37c, the upward flow of air flowing into the region Sc is less likely to be hindered, and thus the heat dissipation performance is less likely to be weakened. Figure 2 Operation and Effects

[0037]

[0038] ​As described above, according to the heat sink (the housing 30) and the box-shaped body 1 in the present embodiment, the walls (the seat portion 35 and the bolt attachment portions 34a and 34b) adjacent to the fins 37a, 37b, and 37c in the direction in which the fins 37a, 37b, and 37c extend (the up-and-down direction) have the through-holes 38a, 38b, and 38c that are opened in the walls facing the fins 37a, 37b, and 37c in the direction in which the fins 37a, 37b, and 37c extend and penetrate the walls. Therefore, the air flowing along the fins 37a, 37b, and 37c can pass through the through-holes 38a, 38b, and 38c of the walls 35, 34a, and 34b. Therefore, even when the walls 35, 34a, and 34b exist in the vicinity of the fins 37a, 37b, and 37c, the flow of the air is less likely to be obstructed. Therefore, as in the present example, even when the walls for the seat portion 35 that fixes the power input terminal 36 and the bolt attachment portions 34a and 34b are in close contact with the fins 37a, 37b, and 37c, heat can be efficiently dissipated from the fins 37a, 37b, and 37c. Therefore, the heat sink 30 and the box-shaped body 1 according to the present embodiment have excellent heat dissipation performance.

[0039] Further, at least one of the plurality of through-holes 38a, 38b, and 38c is opened at a position adjacent to a gap sandwiched between a pair of adjacent fins 37a, 37b, and 37c in the direction in which the fins 37a, 37b, and 37c extend. Therefore, the air flowing through the gap can smoothly flow into the through-holes 38a, 38b, and 38c. Therefore, it is possible to improve the heat dissipation performance of the heat sink 30.

[0040] Further, another wall (the bolt attachment portion 34a) is located at a position adjacent to the wall (the seat portion 35) in the direction (the left-and-right direction) intersecting the direction in which the fins 37a, 37b, and 37c extend. Therefore, even when the air flowing along the fin 37a is difficult to flow around the wall 35, the air passes through the through-holes 38a and 38b of the walls 35 and 34a, and thus it is possible to improve the heat dissipation performance of the heat sink 30.

[0041] Further, by providing the through-holes 38a, 38b, and 38c, it is possible to reduce the weight of the box-shaped body 1.

[0042] Other Embodiments

[0043] The present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope of the present disclosure. For example, the present disclosure is not limited to the above-described embodiments, and modifications, improvements, and the like can be appropriately made. Further, the materials, shapes, sizes, numbers, arrangement positions, and the like of the components in the above-described embodiments are freely selected and are not limited as long as the present disclosure can be implemented.

[0044] Here, the features of the heat sink 30 and the box-shaped body 1 according to the above-described embodiments of the present disclosure are briefly summarized and listed in the following [1] to [6].

[0045] [1] A heat sink (30) that radiates heat generated by a heat source, the heat sink (30) comprising:

[0046] a base (32) to which heat is transferred, a fin (37a, 37b, 37c) provided on the base (32), and a wall (35, 34a, 34b) provided on the base (32) and adjacent to the fin (37a, 37b, 37c) in a direction in which the fin (37a, 37b, 37c) extends, wherein

[0047] the wall (35, 34a, 34b) has a through-hole (38a, 38b, 38c) that is open in a face of the wall (35, 34a, 34b) facing the fin (37a, 37b, 37c) in the direction and penetrates the wall (35, 34a, 34b).

[0048] According to the heat sink having the configuration [1], the wall adjacent to the fin in the direction in which the fin extends has the through-hole that is open in the wall face facing the fin and penetrates the wall. Therefore, even when the wall is present in the vicinity of the fin, air flowing along the fin can pass through the through-hole of the wall, and thus the flow of air is less likely to be hindered by the wall. Therefore, for example, even when the wall for a seat portion or the like for fixing a power input terminal and the fin are integrally provided on the base and in close contact with each other, heat can be effectively dissipated from the fin. Thus, the heat sink having the present configuration has excellent heat dissipation performance.

[0049] [2] The heat sink (30) according to [1], further comprising:

[0050] a plurality of fins (37a, 37b, 37c) and a plurality of through-holes (38a, 38b, 38c), wherein

[0051] at least one of the plurality of through-holes (38a, 38b, 38c) is open at a position adjacent to a gap sandwiched between a pair of adjacent fins (37a, 37b, 37c) in the direction.

[0052] According to the heat sink having the configuration [2], at least one of the plurality of through-holes is open at a position adjacent to the gap sandwiched between a pair of adjacent fins. Therefore, air flowing through the gap can smoothly flow into the through-hole. Thus, it is possible to improve the heat dissipation performance of the heat sink.

[0053] [3] The heat sink (30) according to [1], further comprising:

[0054] Another wall (34a) is located adjacent to the wall (35) in a direction intersecting the direction.

[0055] According to the heat sink having the configuration [3], even when air flowing along the fins has difficulty flowing around the walls due to the presence of another wall at a position adjacent to the walls, the heat dissipation performance of the heat sink can be improved by the air passing through the through-holes of the walls.

[0056] [4] A box-shaped body (1) for housing a heat source in an internal space, the box-shaped body (1) comprising:

[0057] The heat sink (30) according to any one of [1] to [3] as at least a part of an outer wall of the box-shaped body (1).

[0058] According to the box-shaped body having the configuration [4], the heat sink is provided as at least a part of an outer wall of the box-shaped body. Therefore, heat generated by a heat source inside the box-shaped body can be effectively radiated to the outside of the box-shaped body. Thus, the box-shaped body having this configuration has excellent heat dissipation performance.

[0059] [5] The box-shaped body (1) according to [4], wherein

[0060] The wall of the heat sink (30) is a seat portion (35) configured to fix a terminal (36) electrically connecting the inside and the outside of the box-shaped body (1).

[0061] According to the box-shaped body having the configuration [5], the wall of the heat sink serves as a seat portion to fix a terminal electrically connecting the inside and the outside of the box-shaped body. Therefore, the seat portion is less likely to impede heat dissipation.

[0062] [6] The box-shaped body (1) according to [4], further comprising:

[0063] A housing (30) and a lid (20) defining an internal space, wherein

[0064] The wall of the heat sink (30) is an attachment portion (34a, 34b) allowing attachment of a fixing tool for fixing the lid (20) to the housing (30).

[0065] According to the box-shaped body having the configuration [6], the wall of the heat sink serves as an attachment portion allowing attachment of a fixing tool for fixing the housing and the lid constituting the box-shaped body. For example, when a bolt is used as the fixing tool, even when the attachment portion for providing a bolt fastening hole is provided in the vicinity of the fins, the attachment portion is less likely to impede heat dissipation.

Claims

1. A heat sink that radiates heat generated by a heat source, the heat sink comprising: a base to which heat is transferred; a fin provided on the base; and a wall provided on the base and adjacent to the fin in a direction in which the fin extends, wherein the wall has a through-hole that opens in a face of the wall facing the fin in the direction and penetrates the wall.

2. The heat sink according to claim 1, further comprising: a plurality of fins and a plurality of through-holes, wherein at least one of the plurality of through-holes opens at a position adjacent to a gap sandwiched between a pair of adjacent fins in the direction.

3. The heat sink according to claim 1, further comprising: another wall located at a position adjacent to the wall in a direction intersecting the direction.

4. A box-shaped body for accommodating a heat source in an internal space, the box-shaped body comprising: the heat sink according to any one of claims 1 to 3 as at least a portion of an outer wall of the box-shaped body.

5. The box-shaped body according to claim 4, wherein the wall of the heat sink is a seat portion configured to fix a terminal that electrically connects an inside and an outside of the box-shaped body.

6. The box-shaped body according to claim 4, further comprising: a case and a lid that define the internal space, wherein the wall of the heat sink is an attachment portion that allows a fixing tool for fixing the lid to the case to be attached.

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