JP2019012588A - Heat sink - Google Patents

Abstract

To solve a problem of a conventional heat sink that if force is applied to a fin plate, a heat radiation fin is fallen over causing difficulty to assemble the heat sink.SOLUTION: A heat sink according to the present invention includes first leg parts provided at one surface side of surfaces included in a fin plate; and a second leg part provided at the other surface side facing the one surface. In the heat sink according to the present invention, the leg parts are provided on both surfaces of the fin plate. Thus, when force is applied to the fin plate, the leg parts, which are provided protruding in a direction in which the force is applied, support the fin plate. Therefore, a heat radiation fin is inhibited from falling over and the heat sink is easily assembled.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a heat sink that releases heat.

A heat sink for heat dissipation is provided on a substrate on which a heat generating component such as a semiconductor element or a light source element is provided in order to suppress an increase in the temperature of the heat generating component. The heat sink has a plate-like fin plate and legs joined to the substrate, and is provided in a state where the fin plate rises from the substrate.
Such heat sinks include those that directly join the legs to the substrate and those that join the plate to the substrate by placing a fin plate upright on a flat plate.

  Conventional heat sinks are formed by bending a thin plate-like member, and in some longitudinal sections, fin plates and legs are formed in an L shape. That is, in the conventional heat sink, the leg part joined to a board | substrate was provided only in one surface side among the two surfaces of a fin board.

Japanese Patent Laid-Open No. 11-17080

  In the conventional heat sink, since the leg portion joined to the substrate is provided only on one surface side of the fin plate, when the fin plate is erected on the substrate, the fin plate is moved from one surface side to the other surface side. When a force is applied to the heat sink, the fin plate falls down and there is a problem that the heat sink cannot be easily assembled.

  The present invention was made in order to solve the above-described problems, and an object of the present invention is to obtain a heat sink that can be easily assembled by preventing the fin plate from falling when the fin plate is erected on the substrate. And

  The heat sink according to the present invention includes a first leg provided on one surface side of the surfaces of the fin plate, and a second leg provided on the other surface side opposite to the one surface. It is to be prepared.

  According to the heat sink according to the present invention, the leg portions are provided on both sides of the fin plate. As a result, when force is applied to the fin plate, the leg portion that protrudes on the opposite side of the surface to which the force is applied supports the fin plate, so that the fin plate is prevented from falling and the heat sink can be easily assembled. it can.

The perspective view which shows the external appearance of the lighting fixture in Embodiment 1 The exploded perspective view of the lighting fixture in Embodiment 1 1 is an exploded perspective view of a heat sink according to Embodiment 1. FIG. The perspective view of the radiation fin in Embodiment 1 Schematic configuration diagram in the process of manufacturing the radiation fin in the first embodiment Side view of radiation fin in embodiment 1 The perspective view of the radiation fin which shows the modification of Embodiment 1 The perspective view of the radiation fin in Embodiment 2 The perspective view of the radiation fin in Embodiment 3 Schematic configuration diagram in the process of manufacturing the radiation fin in the third embodiment The perspective view of the radiation fin in Embodiment 4 Schematic configuration diagram in the process of manufacturing the radiation fin in the fourth embodiment Schematic configuration diagram in the process of manufacturing the radiation fin in the fourth embodiment The perspective view which shows the external appearance of the lighting fixture 200 An exploded perspective view of the lighting apparatus 200

Embodiment 1 FIG.
Hereinafter, the lighting fixture using the heat sink of this invention is demonstrated. FIG. 1 is a perspective view showing an appearance of lighting apparatus 100 according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view in which the lighting apparatus 100 is disassembled. In the luminaire 100 according to the first embodiment, the light source unit 10 having the light source module 13 provided with a plurality of LEDs is attached to the upper part of the frame 20, and light from the LEDs is irradiated downward of the frame 20. For example, it is a downlight used in an office or the like. Here, the depth direction, the width direction, and the height direction of the lighting fixture 100 are defined as the X, Y, and Z axis directions illustrated in FIG.

The luminaire 100 includes a light source unit 10 and a frame 20, and the light source unit 10 and the frame 20 are screwed together with screws 22.
The frame 20 is formed in a cylindrical shape with an upper surface side and a lower surface side opened. A reflection plate is provided on the inner side surface of the frame 20 to reflect light from the light source module 13 and irradiate downward. On the upper surface of the frame 20, a female screw that is screwed with the screw 22 when the light source unit 10 is attached is formed. A plurality of springs 21 are provided on the outer surface of the frame 20, and when the lighting fixture 100 is inserted into a mounting portion such as a ceiling, the lighting fixture 100 is fixed to the mounting portion by the elastic force of the spring 21. .

  The light source unit 10 is inserted through an opening on the upper surface of the frame 20 and irradiates light from the light source, and includes a heat sink 11, a sheet 12, a light source module 13, a substrate holder 14, and a cover 15.

  The light source module 13 is a substrate provided with a plurality of LEDs as a light source on the lower surface, and emits light emitted from the lighting fixture 100. The sheet 12 is a heat transfer member provided on the upper surface of the light source module 13. The heat sink 11 is provided on the upper surface of the sheet 12 and emits heat generated by light emitted from the light source to the outside of the lighting fixture 100. The substrate holder 14 is provided on the lower surface of the light source module 13, and fixes the light source module 13, the sheet 12, and the heat sink 11. The board retainer 14 and the heat sink 11 are provided with screw holes, and screws 22 are passed through the screw holes and fixed. Further, the substrate retainer 14 is formed in a cylindrical shape having an opening inside, and the light source module 13 is disposed so as to cover the opening. The cover 15 is attached to the substrate holder 14 and covers the lower surface of the light source module. The cover 15 has translucency, and transmits light from the light source module 13 and protects the light source module 13.

The light source unit 10 is configured by combining the heat sink 11, the sheet 12, the light source module 13, the substrate holder 14, and the cover 15 as described above.
The light source unit 10 is assembled by arranging the sheet 12, the light source module 13, and the substrate retainer 14 in this order on the lower surface of the heat sink 11 and attaching the cover 15 with four screws 22 to the lower surface of the substrate retainer 14. Then, the assembled light source unit 10 is inserted from the opening on the upper surface of the frame 20, and the female screw formed on the frame 20 and the screw 22 are screwed together, whereby the lighting fixture 100 is assembled. Since the light source module 13 and the heat sink 11 are connected via the sheet 12 which is a heat transfer member, the heat generated from the light source module 13 is transferred to the heat sink 11 via the sheet 12 and is transferred from the heat sink 11 to the atmosphere. Heat is dissipated.

  Next, the structure of the heat sink 11 is demonstrated based on FIG. FIG. 3 is an exploded perspective view of the heat sink in the first embodiment. The heat sink 11 radiates heat from the light source module 13 that has generated heat, and includes a flat plate 23 and heat radiating fins 30 erected on the plate 23. The plate 23 has an upper surface and a lower surface. The first leg 41 and the second leg 42 are connected to the upper surface, and the heat generating component is connected to the lower surface. The heat generating component is the light source module 13. The heat sink 11 is formed by connecting a plurality of heat radiation fins 30 in the Y direction on the upper surface of the plate 23 and joining the plate 23 and the heat radiation fins 30 by a connection method such as welding or rivet processing.

  Next, the structure of the radiation fin 30 is demonstrated based on FIG. 4A is a perspective view showing the appearance of the radiating fin 30 according to the first embodiment, and FIG. 4B is an appearance when the radiating fin 30 of FIG. 4A is rotated by 180 ° about the Z axis. FIG. The radiating fin 30 includes a fin plate 31 and first and second leg portions 41 and 42 that are legs, and the first leg portion 41 and the second leg portion 42 protrude in opposite directions.

  The heat radiating fin 30 has two surfaces 32 and 33, one surface 32 and the other surface 33 located on the opposite side of the one surface 32. The fin plate 31 has a shape in which both ends of the upper side 70 of the rectangular metal plate are chamfered. An end 34 to which the first leg 41 and the second leg 42 are connected is formed at the lower end of the fin plate 31.

  The first leg portion 41 is provided on the one surface 32 side so as to protrude from the end portion 34 of the fin plate 31 to erect the fin plate 31. Standing up means standing up. The first leg portions 41 are provided at both ends of the end portion 34 in the X-axis direction. As described above, since the two first leg portions 41 are provided so as to protrude from both ends of the end portion 34 toward the one surface 32 side, the two first leg portions 41 and the fins can be seen when the radiating fin 30 is viewed from the positive direction of the Z axis. A recess is formed by the plate 31.

  The first leg portion 41 has a first surface 43 that is thermally connected to the heat-generating component. To be thermally connected to the heat generating component, heat from the heat generating component may be transmitted to the first surface 43, the heat generating component may be directly joined to the first surface 43, or the heat generating component may be It may be connected to the first surface 43 via the surface of the substrate, the plate 23 or the like. The shape of the 1st leg part 41 is formed in the rectangle, and the lower surface is the 1st surface 43 connected to a heat-emitting component. The first surface 43 is a surface joined to the plate 23, and is thermally connected to the light source module 13 that is a heat generating component via the plate 23 and the sheet 12.

  The first leg portion 41 is provided with a first surface 43 perpendicular to the one surface 32, and the fin plate 31 is erected. Note that the vertical is not necessarily 90 degrees, and the first leg 41 fin plate 31 may be raised.

  The second leg portion 42 is provided on the other surface 33 side so as to protrude from the end portion 34 of the fin plate 31 to erect the fin plate 31. The second leg portion 42 is provided at the end portion 34 located between the two first leg portions 41. That is, the first leg portion 41 and the second leg portion 42 are provided at positions that do not overlap in the Y-axis direction perpendicular to the one surface 32. Thus, since the end 34 located between the first legs 41 includes one second leg 42, when the heat radiating fin 30 is viewed from the positive direction of the Z axis, the second leg 42 and the fin plate 31. A convex part is formed.

  In the second leg portion 42, the second surface 44 is provided perpendicular to the other surface 33, and the fin plate 31 is erected. The second surface 44 is on the same plane as the first surface 43.

Next, the manufacturing method of the radiation fin 30 is demonstrated. FIG. 5 is a schematic configuration diagram in the process of manufacturing the radiation fin 30. The radiating fin 30 is formed of a metal plate 300 having one surface 32 and the other surface 33 located on the opposite side of the one surface 32. The plate 300 has a shape in which both ends of the upper side 70 of the quadrangle are chamfered.
The manufacturing method of a radiation fin comprises a cutting process and a bending process. A bending step is performed after the cutting step.

  First, the cutting process will be described. In the cutting process, a cutting part a having a distance WY in the positive direction of the Z-axis is formed at the position of the distance WXa from the side edge 72 on the lower side 71 of the plate 300. Further, a cut portion b having a distance WY in the positive direction of the Z-axis is formed at the position of the distance WXc from the side edge 73 on the lower side 71. By this cutting process, the lower part from the lower side 71 of the plate 300 to the distance WY in the positive Z-axis direction is divided into three parts. That is, in the lower part, a part A from the side edge 72 to the notch part a, a part B from the notch part a to the notch part b, and a part C from the notch part b to the side edge 73 are formed. As for the length in the X direction, the portion A is WXa, the portion B is WXb, and the portion C is WXc. Further, the length WXa and the length WXb are the same. The upper ends of the portions A to C are end portions 34.

  The part A and the part C formed in the cutting process are formed as the first leg part 41, and the part B is formed as the second leg part 42. Further, the fin plate 31 is formed between the end portion 34 and the upper side 70.

Next, the bending process will be described. The folding process includes a first folding process and a second folding process.
First, in the first bending step, the first leg portion 41 is formed by bending the portion A and the portion C. The portion A and the portion C are bent along the end portion 34 toward the one surface 32 so as to be perpendicular to the surface 32. By this first bending step, the first leg portion 41 is provided to protrude from the end portion 34 of the fin plate 31 on the one surface 32 side. Further, the first leg portion 41 is provided at both ends of the end portion 34 in the X-axis direction. Further, since the first leg portion 41 is formed by bending the plate 300, the surface continuous with the other surface 33 becomes the first surface 43.

  Next, a 2nd bending process is demonstrated. In the second bending step, the second leg portion 42 is formed by bending the portion B. The portion A and the portion C are bent along the end portion 34 toward the other surface 33 so as to be perpendicular to the surface 33. By this second bending step, the second leg portion 42 is provided on the other surface 33 side so as to protrude from the end portion 34 of the fin plate 31. Further, the second leg portion 42 is provided at the end portion 34 located between the first leg portions 41. Further, since the plate 300 is bent to form the second leg portion 42, the surface that is continuous with the one surface 32 becomes the second surface 44.

FIG. 6 is a side view of the manufactured radiating fin 30 as viewed from the negative X-axis direction.
The parts A to C are bent so as to form a curve with a radius of curvature R in the bending process. Therefore, when the radiation fin 30 is attached to the plate 23, a triangular gap surrounded by the end portion 34 is formed between the radiation fin 30 and the plate 23.

Next, a method for connecting the radiation fins 30 will be described.
The heat sink 11 is formed by connecting a plurality of radiating fins 30 in the Y direction. The plurality of radiating fins 30 are arranged so that the fin plates 31 face each other. At this time, the adjacent radiating fins 30 are arranged such that the one side surface 32 and the other side surface 33 face each other. And between the 1st leg part 41 which one radiation fin 30 has, it connects by inserting the 2nd leg part 42 which the radiation fin 30 adjacent to the said radiation fin 30 inserts. That is, the concave portion formed by the first leg portion 41 and the convex portion formed by the second leg portion 42 of the adjacent radiating fin 30 are fitted. Therefore, there is no gap between the first leg portion 41 and the second leg portion 42, and the plurality of radiating fins 30 are joined to the plate 23.

  In the lighting fixture 100 of the first embodiment as described above, the first leg portion 41 of the radiating fin 30 is provided so as to protrude perpendicularly to the one surface 32, and the second leg portion 42 is provided to the other surface 33. Therefore, when a force is applied to the fin plate 31 when the radiating fins 30 are arranged on the plate 23, the fin plate 31 is projected by the leg portion that protrudes on the opposite side of the surface to which the force is applied. Is prevented from falling. Specifically, since the first leg portion 41 is provided so as to protrude toward the one surface 32 side, the fin plate is caused by the first leg portion 41 when a force is applied from the other surface 33 side to the one surface 32 side. It is suppressed that 31 falls. Further, since the second leg portion 42 is provided so as to protrude toward the other surface 33 side, the fin plate 31 is tilted by the second leg portion 42 when a force is applied from the one surface 32 side to the other surface 33 side. It is suppressed.

According to the lighting fixture 100 of Embodiment 1 as described above, when the force is applied to the fin plate 31 by providing the leg portions on both sides of the fin plate 31, on the opposite side of the surface to which the force is applied. Since the protruding leg portions support the fin plate 31, it is possible to suppress the radiating fin 30 from falling down and to easily assemble the heat sink 11.
In particular, in a lighting fixture used in an office or the like, since the size of the lighting fixture body is large and the heat generated from the LED is large, the heat sink 11 having a size necessary for heat dissipation is provided. A heat sink used in a computer or the like is miniaturized by blowing warm air with a fan. On the other hand, when installing a fan, it is necessary to suppress the increase in parts cost, the weight of the product, the generation of fan noise, the necessity of design change to provide the fan, etc. Some lighting fixtures do not have a fan. In such a lighting fixture, a heat sink 11 larger than the heat sink used for a computer or the like is required. Further, since the fin plate 31 has a large area, the radiating fins 30 easily fall over. Therefore, it is possible to prevent the radiating fin 30 from falling down in a product including the fin plate 31 having a large area without including a fan for cooling a heat generating component such as a lighting fixture.

  In addition, since the first surface 43 and the second surface 44 connected to the heat generating component are formed as flat surfaces, the fin plate 31 is prevented from falling and the radiating fin 30 is placed on the upper surface of the substrate or the plate 23. It can be easily arranged. Since the first surface 43 and the second surface 44 are on the same plane, and the first leg portion 41 and the second leg portion 42 allow the fin plate 31 to stand up, the radiating fins 30 are arranged on the substrate or the plate 23. There is no need to provide a slit for this purpose or to add a part for fixing the radiating fin 30. Since it is not necessary to change the structure of the substrate and the plate 23, the same shape of the substrate and the plate 23 can be used for the heat radiation fins 30 having different shapes.

  Further, since the plurality of radiating fins 30 are connected by inserting the second leg portions 42 of the adjacent radiating fins 30 between the two first leg portions 41, the positions where the radiating fins 30 are arranged can be easily set. The heat sink 11 can be easily assembled. Moreover, it can suppress that a position shifts after arrange | positioning the radiation fin 30. FIG.

  Moreover, since the length of the 1st leg part 41 and the 2nd leg part 42 in the Y-axis direction is the same, the recessed part and 2nd leg part which are formed with the 1st leg part 41 between the adjacent fin boards 31 are shown. The convex part formed by 42 is fitted without a gap, and it is possible to prevent the heat radiating fin 30 from falling and to promote the heat radiation from the heat sink 11.

  Further, the length of the first leg portion 41 and the second leg portion 42 in the Y-axis direction is the distance between the adjacent fin plates 31. On the other hand, when the first leg portion 41 and the second leg portion 42 are provided symmetrically with respect to the X axis, the length of the first leg portion 41 and the length of the second leg portion 42 of the adjacent radiating fins 30. The sum is the distance between the fin plates 31. Therefore, when the second leg portion 42 is inserted between the first leg portions 41, the Y-axis of the leg portion is more than the case where the first leg portion 41 and the second leg portion 42 are provided symmetrically with respect to the X-axis. Since the length in the direction can be increased, it is possible to suppress the radiating fin 30 from falling.

Moreover, since the radiation fin 30 can be formed from one board 300, compared with the case where it forms with metal mold | die, such as a casting and extrusion, a metal mold expense becomes unnecessary and it can suppress manufacturing cost. Moreover, when forming with a metal mold | die, the thickness of the radiation fin 30 is limited, However, when forming from the board 300, the thickness of the radiation fin 30 can be changed by changing the thickness of the board 300. it can.
Moreover, since the magnitude | size of the 1st leg part 41 and the 2nd leg part 42 can be changed by changing the notch parts a and b of the board 300, it is a shape suitable for the product which uses the heat sink 11, and the objective. Can be easily formed.

  Further, since the heat sink 11 is formed by connecting a plurality of heat radiation fins 30, it is possible to arrange a number of heat radiation fins 30 appropriate for the product and purpose for which the heat sink 11 is used. Many lighting fixtures have different LED output types and main body sizes, but by easily forming an appropriate heat sink 11 for each lighting fixture, it is possible to suppress a shortage of the ability to dissipate heat. it can. Moreover, since the number of the radiation fins 30 can be selected according to the ability to radiate heat, it is possible to suppress the component cost and to prevent the lighting fixture 100 from becoming heavy.

  Further, since the end portion 34 of the radiating fin 30 is bent at the curvature radius R, a gap is formed between the radiating fin 30 and the plate 23, so that air can flow into the gap. Since the area where the heat sink 11 comes into contact with air increases, the amount of heat dissipated by the heat sink 11 can be increased.

  In addition, since the heat sink 11 is manufactured by bonding the radiating fins 30 to the upper surface of the plate 23, the heat sink 11 can be attached to the substrate after the heat sink 11 and the substrate are manufactured. The instrument 100 can be assembled.

FIG. 7 is a perspective view of the radiating fin 30 showing a modification of the first embodiment. In the first embodiment, the fin plate 31 is formed by a single plate 300. However, the present invention is not limited to this, and a part of the fin plate 31 may be cut out to form the vent hole 35. When a plurality of heat radiating fins 30 are connected, it becomes difficult for air to pass between adjacent fin plates 31, so that air warmed by heat radiation from the heat sink 11 is accumulated between the fin plates 31 and is not easily radiated. Therefore, heat can be dissipated by forming convection openings 35 in the fin plate 31 to convect the warmed air between the fin plates 31.
When the vent hole 35 is formed in the fin plate 31, the side on which the vent hole 35 is formed becomes lighter and the balance of the fin plate 31 is lost and the fin plate 31 tends to collapse, but the first leg portion 41 and the second leg portion 42. Therefore, even if the vent hole 35 is formed, the fin plate 31 can be prevented from falling.

  Note that the size and shape of the vent 35 can be changed according to the purpose of using the heat sink 11.

  Moreover, in Embodiment 1, although it was set as the structure provided with the two 1st leg parts 41 and the 1st 2nd leg part 42, it is not restricted to this, Three or more 1st leg parts 41 and two or more 1st leg parts are used. A configuration including two legs 42 may be employed.

The first leg 41 and the second leg 42 have a smaller total area of the first leg 41 and the second leg 42, which is the area of the entire leg than the area of the fin plate 31. It is preferable to form as follows.
Since the heat sink 11 can dissipate heat as the area in contact with air increases, it is preferable that many fin plates 31 are provided upright. Since the area for attaching the heat sink 11 is determined according to the size of the product, in order to increase the number of fin plates 31 to be erected, the area of the entire leg portion is reduced. On the other hand, as the area of the leg portion of the heat sink 11 is smaller than the area of the fin plate 31, the radiating fin 30 is more likely to fall. In the radiating fin 30 of the present invention, since the leg portions are provided on both sides of the fin plate 31, the radiating fin 30 can be prevented from falling even when the entire leg area is small. It is preferable to increase the number of fin plates 31 that are formed and erected so that the area of the entire portion is reduced.

Embodiment 2. FIG.
In the first embodiment, the heat sink 11 including the radiation fins 30 in which the two first leg portions 41 are provided on the one surface 32 side and the one second leg portion 42 is provided on the other surface 33 side has been described. However, in the second embodiment, the heat sink 11 including the heat radiation fin 50 provided with one first leg portion 41 and one second leg portion 42 will be described.
FIG. 8 is a perspective view showing an external appearance of the radiating fin 50 according to the second embodiment. In the second embodiment, the difference from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

The radiating fin 50 according to the second embodiment is formed at a position where the first leg 41 is rotated 180 degrees around the Z axis with respect to the second leg. Moreover, the radiation fin 50 includes one first leg 41 and one second leg 42, and is provided at a position where the first leg 41 and the second leg 42 do not overlap in the X-axis direction.
The first leg portion 41 is provided so as to protrude toward the one surface 32 side from the center of the end portion 34 in the X-axis direction to the side edge 72. The second leg portion 42 is provided so as to protrude from the center of the end portion 34 in the X-axis direction to the side edge 73 toward the other surface 33.

Next, the manufacturing method of the radiation fin 50 is demonstrated.
First, a notch of the distance WY is made in the positive direction of the Z axis at the center position of the lower side 71 of the plate 300. By this cutting process, the lower part from the lower side 71 of the plate 300 to the distance WY in the positive Z-axis direction is divided into two parts. The first leg portion 41 is formed by bending one of the two portions to the one surface 32 side perpendicularly to the surface 32. Further, the second leg 42 is formed by bending the other side perpendicular to the surface 33 on the other surface 33 side.

Next, a method for connecting the radiating fins 50 will be described.
Adjacent radiating fins 50 may be arranged such that one surface 32 and the other surface 33 face each other, one surface 32 and one surface 32, or the other surface 33 and the other surface 33. May be arranged facing each other. Since the first leg portion 41 is formed at a position rotated 180 degrees around the Z axis with respect to the second leg portion, the radiation fin 50 rotated 180 degrees around the Z axis is the radiation fin before the rotation. The same shape as 50. Therefore, the adjacent radiating fins 50 can connect the radiating fins 50 regardless of which one of the one surface 32 and the other surface 33 faces each other.

According to the luminaire 100 according to the second embodiment as described above, the first leg portion 41 is formed at a position rotated by 180 degrees around the Z axis with respect to the second leg portion. The heat sink 11 can be easily assembled without limiting the direction of connection.
Moreover, since it cuts and manufactures from the center of the lower side 71 of the board 300 to the edge part 34, there are few processes to cut and the heat radiation fin 50 can be manufactured easily.

Embodiment 3 FIG.
In the first embodiment, the radiating fin 30 having one fin plate 31 has been described. In the third embodiment, the radiating fin 60 having a plurality of fin plates 31 will be described. FIG. 9 is a perspective view showing the appearance of the heat radiating fin 60 according to the second embodiment. In the second embodiment, the difference from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

The radiating fin 60 according to the third embodiment includes a plurality of fin plates, a connection portion 63 that connects the plurality of fin plates, a first leg portion 64, and a second leg portion 65.
The plurality of fin plates are a first fin plate 61 and a second fin plate 62 erected so as to face the first fin plate 61. Openings cut out in a quadrangular shape are formed at both ends below the first fin plate 61 and the second fin plate 62. The connecting portion 63 is connected perpendicularly to the first fin plate 61 and the second fin plate 62 and has a flat surface joined to the plate 23. End portions 34 are formed between the connection portion 63 and the first fin plate 61 and between the connection portion 63 and the second fin plate 62, respectively.
When the center of the connection part 63 is the origin, the shape of the radiating fin 60 is symmetrical with respect to the X axis in the Y axis positive direction and the Y axis negative direction.

The first leg portion 64 is provided so as to protrude from the first fin plate 61 on one surface 68 side which is the surface opposite to the surface facing the second fin plate 62 among the surfaces of the first fin plate 61. . Further, the first leg portion 64 has a first surface 66 connected to the heat generating component.
The first leg portions 64 are provided at both ends of the first fin plate 61 in the X-axis direction. As described above, since the first fin plate 61 is provided with the two first leg portions 64 projecting toward the one surface 68 at both ends, when the heat radiation fin 30 is viewed from the positive direction of the Z axis, the two first leg portions are provided. A recess is formed by 64 and the first fin plate 61.

  The second leg portion 65 is provided so as to protrude from the second fin plate 62 on the other surface 69 side which is the surface opposite to the surface facing the first fin plate 61 among the surfaces of the second fin plate 62. . Further, the second leg portion 65 has a second surface 67 connected to the heat generating component. The second leg portion 65 is formed on the same plane as the first leg portion 64. Further, the first leg portion 64 and the second leg portion 65 are connected to each other and are formed by a single metal plate 400.

Next, the manufacturing method of the radiation fin 60 is demonstrated.
FIG. 10 is a schematic configuration diagram in the process of manufacturing the radiating fins 60. The heat radiating fin 60 is formed from a metal plate 400 having four corners of a square chamfered. Manufacture of the radiation fin 60 includes a cutting process and a bending process. In the cutting step, symmetrical cut portions d, e, f, and g are formed around the X axis of the plate 400. In the bending step, both sides in the Y axis direction are bent in the positive Z axis direction.

First, a method for forming the first fin plate 61 and the first leg portion 64 will be described.
In the cutting process, a cut perpendicular to the X-axis negative direction from the side 72 and a cut part d perpendicular to the Y-axis negative direction from the cut to the end 34 are formed. Further, the notch e is formed at a position symmetrical to the notch d and the Y axis. An end 34 is formed between the notch d and the notch e. A portion from the cut portion d to the X axis and a portion from the cut portion e to the X axis are formed as the first leg portion 64. Further, the portion in the positive Y-axis direction from the end portion 34 is formed as a first fin plate 61.

  In the bending step, the first fin plate 61 is formed by bending the plate 400 in the Y-axis positive direction in the Z-axis positive direction with the end portion 34 as the center. The surface on the Y axis positive direction side of the first fin plate 61 is one surface 68. By bending the plate 400 as described above, the first leg portion 64 protrudes toward the one surface 68 at both ends of the first fin plate 61.

Next, a method for forming the second fin plate 62 and the second leg 65 will be described.
The second fin plate 62 and the second leg 65 may be formed symmetrically with the first fin plate 61 and the first leg 64 around the X axis. First, in the cutting step, a cut portion f symmetrical to the cut portion d and a cut portion g symmetrical to the cut portion e are formed. In the bending step, the second fin plate 62 is formed by bending the plate 400 in the negative Y-axis direction with respect to the end portion 34 in the positive Z-axis direction with the end portion 34 as the center. The surface on the Y axis negative direction side of the second fin plate 62 is the other surface 69, and the second leg portion 65 protrudes toward the other surface 69 at both ends of the second fin plate 62.

At the lower ends of the first fin plate 61 and the second fin plate 62, openings cut into a square by the notches d, e, f, and g are formed.
The heat radiation fin 60 is formed by the manufacturing process as described above.

In the lighting fixture 100 of Embodiment 3 as described above, since the connecting portion 63 for connecting the plurality of fin plates, the first leg portion 64, and the second leg portion 65 are provided, the heat radiation fin 60 is attached to the plate 23. When a force is applied to the fin plate 31 in the case of arrangement, the fin plate 31 is prevented from falling down by a leg portion that protrudes on the opposite side of the surface to which the force is applied.
Specifically, the connecting portion 63 is connected to the first fin plate 61 and the second fin plate 62, and the first leg portion 64 is provided so as to protrude toward the one surface 68. When force is applied from the side, the connecting portion 63 and the first leg portion 64 prevent the heat radiation fin 60 from falling. Further, since the second leg portion 65 is provided so as to protrude toward the other surface 69 side, when a force is applied from the one surface 68 side, the first fin plate 61 is connected by the connecting portion 63 and the second leg portion 65. And it is suppressed that the 2nd fin board 62 falls.

  According to the lighting fixture 100 of Embodiment 3 as described above, since the connection portion 63, the first leg portion 64, and the second leg portion 65 are provided, when force is applied to the fin plate, the connection portion 63 and force Since the leg part which protrudes and is provided on the opposite side of the surface to which the heat is applied supports the fin plate, the radiating fin 60 is prevented from falling and the heat sink 11 can be assembled easily.

  In addition, since one radiating fin 60 includes the first fin plate 61 and the second fin plate 62, the number of the radiating fins 60 is larger than when the radiating fin including the one fin plate 31 is installed on the plate 23. Therefore, the work of assembling the heat sink 11 can be facilitated.

  In addition, since the first fin plate 61 and the second fin plate 62 are formed with openings cut into squares by the notches d, e, f, and g, the first fin plate 61 and the second fin plate The air heated below 62 can be convected to dissipate heat.

  In the third embodiment, the second fin plate 62 and the second leg 65 are formed symmetrically with the first fin plate 61 and the first leg 64 around the X axis. The first fin plate 61 and the second fin plate 62 may have different shapes. The first leg portion 64 and the second leg portion 65 may have different shapes.

  In the first to third embodiments, the first leg portions 41 and 64 and the second leg portions 42 and 65 are formed in a quadrangular shape by making a cut perpendicular to one side of the metal plate. However, the present invention is not limited to this, and the first leg portions 41 and 64 and the second leg portions 42 and 65 may be formed by cutting diagonally with respect to one side.

Embodiment 4 FIG.
In the first embodiment, the first leg portion 41 and the second leg portion 42 have been described with respect to the heat sink 11 including the radiation fins 30 provided at positions where they do not overlap in the Y-axis direction. The 1st leg part 41 and the 2nd leg part 42 demonstrate the heat sink 11 provided with the radiation fin 80 provided in the position which overlaps with a Y-axis direction.
FIG. 11 is a perspective view showing the appearance of the heat radiating fin 80 according to the fourth embodiment. In the fourth embodiment, the difference from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

  In the heat radiation fin 80 according to Embodiment 4, the first leg portion 41 is formed symmetrically with the second leg portion 42 with respect to the X axis. The heat radiation fin 80 is formed by bending a single plate 500 at a plurality of locations.

A method for manufacturing the radiating fin 80 will be described.
FIG. 12 is a schematic configuration diagram in the process of manufacturing the radiating fins 80. The radiating fins 80 are formed from a single sheet metal. The mountain fold portion 90 of the sheet metal is indicated by a broken line, and the valley fold portion 91 is indicated by a one-dot broken line. The mountain fold 90 is formed between the center of the side 72 of the sheet metal and the center of the side 73. A valley fold 91 is formed at a position shifted from the mountain fold 90 in parallel in the positive direction of the Y axis and a position shifted in parallel in the negative direction of the Y axis. The two valley fold portions 91 are formed symmetrically with respect to the mountain fold portion 90.

  A portion from the mountain fold 90 to the valley fold 91 is formed as the fin plate 31. Further, a portion from the valley fold 91 to the end in the Y-axis positive direction is formed as a first leg 41, and a portion from the valley fold 91 to the end in the Y-axis negative direction is the second leg 42. Formed as.

First, the plate 500 is bent in half at the mountain fold 90. Next, the first leg portion 41 is bent perpendicularly to the fin plate 31 by the valley fold portion 91. Further, the second leg portion 42 is bent perpendicularly to the fin plate 31 by the valley fold portion 91.
The heat radiation fin 60 is formed by the manufacturing process as described above.

  According to the luminaire 100 according to the fourth embodiment as described above, the first leg portion 41 and the second leg portion 42 are positioned so as to overlap in a direction perpendicular to the one surface 32 of the fin plate 31. Since it is the structure provided, the radiation fin 80 can be formed by bending the board 500 of 1 sheet. Therefore, it is not necessary to make a cut and the heat sink 11 can be easily manufactured with a small number of work steps.

  Further, since the size and thickness of the fin plate 31, the first leg portion 41, and the second leg portion 42 can be easily changed by changing the folding position, the shape can be made suitable for the purpose of the heat sink 11. The heat radiation fin 80 can be formed.

In addition, it is only necessary to be able to form the fin plate 31, the first leg portion 41, and the second leg portion 42 formed symmetrically with the first leg portion 41 with respect to the X axis by bending the plate 500, The folding position and the number of foldings can be changed.
FIG. 13 is a schematic configuration diagram showing a modified example of the process of manufacturing the radiating fin 80 of the fourth embodiment. In the modification of the fourth embodiment, the mountain fold 90, the valley fold 91, and the mountain fold 90 are formed in this order from the positive Y-axis direction of the plate 500. As a result, the plate 500 from the end in the positive Y-axis direction to the first mountain fold 90 and the plate 500 from the first mountain fold 90 to the valley fold 91 are formed as the fin plate 31. . A plate 500 from the valley fold 91 to the second mountain fold 90 is formed as the second leg portion 42, and a plate 500 from the second mountain fold 90 to the end in the negative Y-axis direction is formed. The first leg portion 41 and the second leg portion 42 are formed.

  In the first to fourth embodiments, the heat sink 11 includes the radiation fins 30 and the plate 23. However, the heat sink 11 may not be provided with the plates 23 and may be directly joined to the heat-generating component.

  In addition, the first leg portions 41 and 64 and the second leg portions 42 and 65 are provided so as to be perpendicular to the surfaces 32 and 33 of the fin plate 31, but the vertical is not necessarily 90 degrees. The fin plate 31 only has to rise from the substrate or plate 23 to which the heat radiating fins are attached. When the plate 23 or the like is a flat surface, the first surface 43 and the second surface 44 may be on the same plane.

  Further, in the bending step, it is bent along the end portion 34, but may be bent in accordance with the shape of the plate 23 or the like. Therefore, when there is a step in the plate 23 or the like, it may be bent at a position shifted from the end 34 toward the lower side 71 by a distance corresponding to the height of the step.

  Moreover, although the heat sink 11 used for the downlight used in an office etc. was demonstrated in said Example, it can use for the lighting fixture of the kind from which a size and a shape differ not only in this. For example, it can be used for a lighting fixture attached to a ceiling of a gymnasium or the like.

  FIG. 14 is a perspective view showing an appearance of the lighting fixture 200 using the heat sink 11 of Embodiments 1 to 4, and FIG. 15 is an exploded perspective view of the lighting fixture 200 disassembled. The lighting fixture 200 used in a gymnasium or the like has a larger housing and a larger LED output than a downlight used in an office or the like. There is. Therefore, the heat sink is formed by increasing the area of the fin plate 31 or increasing the number of the fin plates 31. As the area of the fin plate 31 is larger or the number of the fin plates 31 arranged is larger, the heat radiation fin 30 is more likely to fall when the heat radiation fin 30 is connected. According to the radiating fin 30 according to the present invention, since the leg portions are provided on both sides of the fin plate 31, like the lighting fixture 200, the fin plate 31 has a large area and requires many radiating fins 30. In this case, it is possible to easily assemble the heat sink while suppressing the radiating fins 30 from falling.

  The heat sink and the lighting fixture according to the present invention can be widely used as lighting fixtures for home use and business use.

  10 Light source unit, 11 Heat sink, 12 Sheet, 13 Light source module, 14 Substrate holder, 15 Cover, 20 Frame, 21 Spring, 22 Screw, 23 Plate, 30, 50, 60, 80 Radiation fin, 31 Fin plate, 32, 33 Surface, 34 end, 35 vent, 41, 64 first leg, 42, 65 second leg, 43, 66 first surface, 44, 67 second surface, 61 first fin plate, 62 Second fin plate, 63 connecting portion, 70 upper side, 71 lower side, 72, 73 side side, 90 mountain fold portion, 91 valley fold portion, 100, 200 lighting fixture, 300, 400, 500 plate

Claims (7)

A fin plate having one surface and the other surface located opposite to the one surface;
A first leg portion having a first surface provided on the one surface side of the fin plate so as to protrude from the fin plate to stand up the fin plate and thermally connected to a component that generates heat;
A second leg portion having a second surface that protrudes from the fin plate and is erected on the other surface side of the fin plate and is thermally connected to a component that generates heat;
A heat dissipating fin. The fin plate is provided upright from the first leg and the second leg,
The radiating fin according to claim 1, wherein the first leg and the second leg are connected to an end of the fin plate.   3. The heat radiation fin according to claim 1, wherein the first leg is provided at a position that does not overlap the second leg in a direction perpendicular to the one surface of the fin plate. .   The radiating fin according to any one of claims 1 to 3, further comprising a plurality of the first leg portions on the one surface side of the fin plate. A plurality of heat dissipating fins according to any one of claims 1 to 4,
The plurality of fin plates are arranged to face each other in a direction perpendicular to the one surface,
A heat sink, wherein a first leg of one of the plurality of radiating fins is connected to a second leg of a radiating fin disposed to face the one radiating fin. Comprising a plate having an upper surface and a lower surface located opposite to the upper surface;
The first leg and the second leg are connected to the upper surface of the plate;
The heat sink according to claim 5, wherein the heat generating component is connected to the lower surface of the plate. A heat dissipating fin according to any one of claims 1 to 6,
The heat radiating fin is thermally connected to a light source that emits light.

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