Heat dissipation member and lighting fixture

Abstract

To provide a heat radiation member having high stiffness even though it is made of a metal plate, and a lighting device.SOLUTION: A heat radiation fin 30 (heat radiation member) which is attached to a base at a bottom part includes: a first side plate part 31; a second side plate part 32 opposite the first side plate part 31; a first connecting piece 81 extending from a first lateral side 31a of the first side plate part 31 toward a first lateral side 32a of the second side plate part 32; and a second connecting piece 82 extending from the first lateral side 32a of the second side plate part 32 toward the first lateral side 31a of the first side plate part 31. The first side plate part 31 and the second side plate part 32 are connected to each other by engagement of the first connecting piece 81 and the second connecting piece 82 to each other.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a heat dissipation member and a lighting fixture including the heat dissipation member. [Background technology]

[0002] Solid-state light-emitting elements such as LEDs (Light Emitting Diodes) are widely used as light sources for various devices in the fields of lighting and displays. For example, in the lighting field, lighting fixtures using LEDs are known. Examples of lighting fixtures using LEDs include downlights that are embedded in the ceiling, ceiling lights that are installed on the ceiling surface, and pendant lights that are suspended from the ceiling. This type of lighting fixture includes an LED light source that emits illumination light and a fixture body that holds the LED light source.

[0003] When a lighting fixture is turned on, the light source generates heat. In this case, in lighting fixtures that use LED light sources, the LED generates heat as it emits light. LEDs have the characteristic that their luminous efficiency decreases and light output decreases as they generate heat. Therefore, when an LED generates heat, the light output of the LED decreases, and the luminous flux of the illumination light emitted by the lighting fixture decreases.

[0004] Therefore, in lighting fixtures using LEDs, a heat sink is used to efficiently dissipate the heat generated by the light source. For example, conventional lighting fixtures use a heat sink that has a base plate as a base and multiple heat dissipation fins attached to the base plate (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-162339 [Patent Document 2] Japanese Patent Application Publication No. 2019-012588 Summary of the Invention [Problem to be solved by the invention]

[0006] In the heat sinks of the lighting fixtures disclosed in Patent Documents 1 and 2, the heat dissipation fins serving as heat dissipation members are made of metal plates (sheet metal). Specifically, the lighting fixture disclosed in Patent Document 1 uses heat dissipation fins made of metal plates formed into a U-shaped cross section. In addition, the lighting fixture disclosed in Patent Document 2 uses heat dissipation fins made of fin plates with legs formed thereon.

[0007] In this way, in conventional lighting fixtures, the heat dissipation fins are formed in a shape that takes into consideration balance so that the fixture is stable when placed still, and are attached to a base.

[0008] However, heat dissipation members made of metal plates have the problem of being less rigid and less resistant to external forces than die-cast heat dissipation members. In particular, if the thickness of the metal plate constituting the heat dissipation member is reduced to less than 1 mm or if an aluminum plate, which has a relatively low strength, is used as the metal plate, the rigidity of the heat dissipation member will be significantly reduced.

[0009] If the rigidity of the heat dissipation member is reduced, the heat dissipation member may be deformed when assembling or installing the lighting fixture, etc. As a result, the appearance quality may be reduced or the desired heat dissipation effect may not be achieved.

[0010] The present invention has been made to solve such problems, and has an object to provide a heat dissipation member and a lighting fixture that have high rigidity even though they are made of metal plates. [Means for solving the problem]

[0011] In order to achieve the above-mentioned object, one aspect of the heat dissipation member of the present invention is a heat dissipation member having a bottom portion attached to a base, and having a first side plate portion, a second side plate portion opposite the first side plate portion, a first connecting piece extending from a first side edge of the first side plate portion toward a first side edge of the second side plate portion, and a second connecting piece extending from the first side edge of the second side plate portion toward the first side edge of the first side plate portion, and the first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece interlocking with each other.

[0012] Another aspect of the heat dissipation member of the present invention is a heat dissipation member whose bottom is attached to a base, and which has a first side plate portion, a second side plate portion opposite the first side plate portion, a bottom plate portion connected to the bottom edge of at least one of the first side plate portion and the second side plate portion and positioned between the first side plate portion and the second side plate portion, and a first protruding piece extending from the first side edge of the first side plate portion toward the first side edge of the second side plate portion, and the lower end of the first protruding piece is located on the bottom plate portion.

[0013] Furthermore, one aspect of a lighting fixture according to the present invention includes the heat dissipation member described above and a base to which the heat dissipation member is attached. [Effects of the Invention]

[0014] It is possible to realize a heat dissipation member having high rigidity and a lighting fixture including this heat dissipation member. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment when viewed from the light emitting side. [Figure 2] FIG. 2 is a perspective view of the lighting fixture according to the embodiment as viewed from the heat dissipation fin side. [Figure 3] FIG. 3 is a cross-sectional view of the lighting fixture according to the embodiment. [Figure 4] FIG. 4 is an exploded perspective view of the lighting fixture according to the embodiment. [Figure 5]FIG. 5 is a diagram for explaining a method for attaching the heat dissipation fin to the device body. [Figure 6] FIG. 6 is a perspective view of a heat dissipation fin according to the embodiment. [Figure 7] FIG. 7 is a perspective view of the heat dissipation fin according to the embodiment as viewed from below. [Figure 8] FIG. 8 is a diagram illustrating a configuration of a heat dissipation fin according to the embodiment. [Figure 9] FIG. 9 is a cross-sectional perspective view of a heat dissipation fin according to the embodiment. [Figure 10] FIG. 10 is an enlarged view of an upper corner portion of a heat dissipation fin according to an embodiment. [Figure 11] FIG. 11 is an enlarged view of a lower corner portion of a heat dissipation fin according to an embodiment. [Figure 12] FIG. 12 is a perspective view of a heat dissipation fin according to a modified example, as viewed from the front side. [Figure 13] FIG. 13 is a perspective view of a heat dissipation fin according to a modified example, viewed from below on the front side. [Figure 14] FIG. 14 is a perspective view of a heat dissipation fin according to a modified example, as viewed from the rear side. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a specific example of the present invention. Therefore, the numerical values, components, the arrangement and connection of the components, steps, and the order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept of the present invention will be described as optional components.

[0017] Note that each figure is a schematic diagram and is not necessarily an exact illustration. In each figure, substantially the same components are assigned the same reference numerals, and duplicate explanations may be omitted or simplified. Furthermore, in this specification, the terms "up" and "down" do not necessarily refer to the upward direction (vertically upward) and downward direction (vertically downward) in absolute spatial recognition.

[0018] (Embodiment) The overall configuration of a lighting fixture 1 according to an embodiment will be described with reference to Figs. 1 to 4. Fig. 1 is a perspective view of the lighting fixture 1 according to the embodiment as seen from the light emission side. Fig. 2 is a perspective view of the lighting fixture 1 as seen from the heat dissipation fin 30 side. Fig. 3 is a cross-sectional view of the lighting fixture 1. Fig. 4 is an exploded perspective view of the lighting fixture 1.

[0019] The lighting fixture 1 is, for example, a downlight that emits light downward (to the floor, the ground, a wall, etc.). The lighting fixture 1 is installed on the ceiling of a building, etc. In this embodiment, the lighting fixture 1 is a ceiling-embedded lighting fixture, and is installed by embedding it in, for example, a circular opening provided in the ceiling.

[0020] 1 to 4, lighting fixture 1 includes light source 10, fixture body 20 that supports light source 10, and heat dissipation fins 30 that dissipate heat generated by light source 10. Lighting fixture 1 in this embodiment further includes holder 40, lens 50, outer frame 60, and auxiliary reflector 70.

[0021] In the lighting fixture 1, the light source 10, fixture body 20, heat dissipation fins 30, holder 40, lens 50, outer frame body 60 and auxiliary reflector 70 are connected to each other by screws or a locking structure or the like and integrated into a lighting unit.

[0022] Furthermore, the lighting fixture 1 may further include a power supply unit (not shown) for supplying power to the light source 10 to make the light source 10 emit light. The power supply unit and the lighting unit are electrically connected by a power line. Specifically, the light source 10 and the power supply unit are electrically connected. Note that the power supply unit is disposed, for example, in the ceiling space near the lighting unit, but is not limited thereto.

[0023] The power supply unit is a power supply box having a power supply circuit that generates power for illuminating the light source 10. In the power supply unit, the power supply circuit converts AC power from a commercial power source into DC power. The power supply circuit is composed of a printed circuit board and multiple electronic components mounted on the printed circuit board. The power supply circuit is housed in, for example, a metal or resin case. The DC power generated by the power supply circuit is supplied to the light source 10 of the lighting unit via a power line.

[0024] Each component of the lighting fixture 1 will now be described in detail.

[0025] [light source] Light source 10 emits light that serves as illumination light for lighting device 1. In this embodiment, light source 10 is an LED light source made up of LEDs, and emits, for example, white light.

[0026] The light source 10 is configured as a light source module having a substrate 11 and a light emitting unit 12. In this embodiment, the light source 10 is an LED module having a COB (Chip On Board) structure in which an LED is directly mounted on the substrate 11.

[0027] The substrate 11 is a light source substrate on which the light-emitting unit 12 is provided. In this embodiment, the substrate 11 is a mounting substrate for mounting an LED. Specifically, the substrate 11 is a wiring substrate on which metal wiring such as copper wiring is formed in a predetermined pattern. The substrate 11 is provided with a pair of electrodes that receive DC power from the outside to cause the LED of the light-emitting unit 12 to emit light. The pair of electrodes are connected to the metal wiring formed on the substrate 11.

[0028] Substrate 11 is a flat substrate (plate) with a constant thickness. In this embodiment, substrate 11 is a rectangular flat plate, and the shape of substrate 11 in a plan view is generally rectangular overall. However, the shape of substrate 11 is not limited to this.

[0029] The substrate 11 may be a single-sided wiring substrate in which metal wiring is formed only on the first surface on which the light-emitting section 12 is provided, or a double-sided wiring substrate in which metal wiring is formed on each of the first surface and the second surface opposite to the first surface.

[0030] The base material constituting the substrate 11 may be a metal-based substrate obtained by applying an insulating coating to the surface of a metal base material made of a metal material such as aluminum or copper, a resin substrate (CEM-3, etc.) made of an insulating resin material, or a ceramic substrate made of a sintered body of a ceramic material such as alumina.

[0031] From the viewpoint of improving the heat dissipation of the substrate 11, it is preferable that the substrate constituting the substrate 11 is a metal-based substrate or a ceramic substrate. On the other hand, from the viewpoint of ensuring a high dielectric strength voltage for the substrate 11, it is preferable that the substrate constituting the substrate 11 is an insulating substrate whose entire substrate is made of an insulating material, such as a resin substrate or a ceramic substrate.

[0032] Light-emitting section 12 is provided on a first surface of substrate 11. In the present embodiment, light-emitting section 12 is provided in approximately the center of substrate 11. As an example, the light-emitting region of light-emitting section 12 is circular, but is not limited to this.

[0033] The light emitting unit 12 emits light of a predetermined color. The light emitted from the light emitting unit 12 becomes the light of the light source 10. Therefore, in this embodiment, the light emitting unit 12 emits white light.

[0034] The light emitting section 12 has a plurality of LEDs mounted on the substrate 11 and a sealing member that seals the plurality of LEDs.

[0035] An LED is an example of a light-emitting element, and in this embodiment, it is a bare chip that emits monochromatic visible light. The LED is, for example, a blue LED chip that emits blue light when powered. A plurality of LEDs are arranged, for example, in a matrix on a substrate. It is sufficient that at least one LED is arranged.

[0036] The sealing member may be, for example, a translucent resin. The sealing member in this embodiment contains a phosphor as a wavelength conversion material that converts the wavelength of light from the LED. The sealing member may be, for example, a phosphor-containing resin in which a phosphor is dispersed in a silicone resin. When the LED is a blue LED chip that emits blue light, for example, a YAG-based yellow phosphor may be used as the phosphor particles to obtain white light.

[0037] In this embodiment, the sealing member is formed to have a circular shape in a plan view so as to seal all of the LEDs collectively. The outer shape of the sealing member determines the outer shape of the light-emitting section 12, so the shape of the light-emitting section 12 in a plan view is also circular. The sealing member may have a shape other than circular (for example, rectangular), or may be surrounded by an annular resin frame. Furthermore, instead of sealing all of the LEDs collectively, the sealing member may seal multiple LEDs in a line by line, or may seal each LED individually.

[0038] The light source 10 configured in this manner is held in the fixture body 20 by the holder 40. In the present embodiment, the light source 10 is disposed on the protruding portion 21 of the fixture body 20 and fixed to the fixture body 20. Specifically, the light source 10 is disposed on the protruding portion 21 by placing the substrate 11 on the upper surface of the protruding portion 21.

[0039] In this embodiment, a heat dissipation sheet 13 is inserted between the fixture body 20 and the light source 10. Specifically, the heat dissipation sheet 13 is inserted between the protrusion 21 of the fixture body 20 and the substrate 11. The heat dissipation sheet 13 is a thermally conductive sheet, and is arranged to improve thermal conductivity from the light source 10 to the fixture body 20. In this embodiment, the heat dissipation sheet 13 is made of an insulating material and has electrical insulation properties. As an example, the heat dissipation sheet 13 is a flat sheet of a constant thickness made of an insulating resin material, and has flexibility such as rubber elasticity.

[0040] [Fixture body] The fixture body 20 is the main body of the lighting fixture 1. The fixture body 20 is a base (a base member) on which the light source 10 is attached. The fixture body 20 has a protrusion 21 as an arrangement portion where the light source 10 is arranged. Therefore, the light source 10 is arranged on the protrusion 21 and attached to the fixture body 20. The protrusion 21 is formed in approximately the center of the fixture body 20 and is formed so as to protrude toward the light source 10 side. The upper surface (top surface) of the protrusion 21 is a flat, planar surface. The upper surface of the protrusion 21 is also approximately rectangular.

[0041] In this embodiment, the fixture body 20 not only functions as a mounting member to which the light source 10 is attached, but also functions as a heat sink to dissipate heat generated by the light source 10. Therefore, the fixture body 20 is preferably made of a material with high thermal conductivity, such as a metal material. In this embodiment, the fixture body 20 is made of aluminum die-casting. However, the fixture body 20 may also be made of sheet metal formed by pressing a metal plate, such as a steel plate.

[0042] The fixture body 20 has a generally cylindrical shape with a bottom. Specifically, the fixture body 20 is a low-profile, generally cylindrical housing with a bottom. The light source 10 is disposed on the inner surface of the fixture body 20. Specifically, the light source 10 is disposed on the bottom surface of the bottom of the fixture body 20. In other words, the protrusion 21 on which the light source 10 is disposed is formed on the bottom of the fixture body 20.

[0043] Furthermore, a plurality of heat dissipation fins 30 are attached to the fixture body 20. The plurality of heat dissipation fins 30 are arranged on the outer surface of the fixture body 20. Specifically, the plurality of heat dissipation fins 30 are arranged on the outer surface of the bottom of the fixture body 20.

[0044] In this embodiment, the plurality of heat dissipating fins 30 are arranged radially from the center (reference) of the center of the bottom of the fixture body 20. Specifically, 14 heat dissipating fins 30 are attached to the fixture body 20. The 14 heat dissipating fins 30 are arranged so that the inner portions of two adjacent heat dissipating fins 30 are close to each other.

[0045] Each heat dissipation fin 30 is attached to the fixture body 20 by a protrusion 22 provided on the fixture body 20. The protrusion 22 is formed so as to protrude outward from the outer surface of the bottom of the fixture body 20. The protrusion 22 is formed, for example, by pressing the bottom of the fixture body 20 from the inside to the outside. In this embodiment, one heat dissipation fin 30 is attached to the fixture body 20 by three protrusions 22. Specifically, since 14 heat dissipation fins 30 arranged radially are used, the fixture body 20 is provided with 14 radial rows of protrusions 22, each row consisting of three protrusions.

[0046] [Heat dissipation fins] The heat dissipation fins 30 are heat dissipation members that dissipate heat generated by the light source 10. In other words, the heat dissipation fins 30, together with the fixture body 20, form a heat sink. Therefore, the heat generated by the light source 10 is conducted to the fixture body 20 and the heat dissipation fins 30 and dissipated to the outside. Specifically, the heat conducted to the heat dissipation fins 30 is dissipated into the atmosphere by natural air cooling.

[0047] The heat dissipation fins 30 are made of sheet metal, such as steel or aluminum plates. The heat dissipation fins 30 are formed into a predetermined shape by bending the metal plate. In this embodiment, the heat dissipation fins 30 are formed into a predetermined shape by three-dimensionally deforming a single metal plate. Note that the heat dissipation fins 30 may also be formed into a predetermined shape by combining multiple metal plates.

[0048] The metal plate constituting the heat dissipation fins 30 is a thin plate having a thickness of, for example, less than 1 mm. In this embodiment, an aluminum plate having a thickness of 0.5 mm is used as the metal plate. However, the thickness of the metal plate constituting the heat dissipation fins 30 is not limited to less than 1 mm.

[0049] The specific shape will be described later, but the heat dissipation fin 30 is formed to have at least a first side plate portion 31, a second side plate portion 32, and a bottom plate portion 33. The first side plate portion 31 and the second side plate portion 32 are the sides of the heat dissipation fin 30, and the bottom plate portion 33 is the bottom of the heat dissipation fin 30. The heat from the light source 10 conducted to the fixture body 20 is conducted to the bottom plate portion 33 of the heat dissipation fin 30, and then conducted from the bottom plate portion 33 to the first side plate portion 31 and the second side plate portion 32, and is then dissipated into the atmosphere.

[0050] The heat dissipation fin 30 has a bottom plate portion 33 attached to the fixture body 20. The bottom plate portion 33 is a plate-like member having a substantially constant width, and is disposed with its longitudinal direction aligned with the radial direction of the fixture body 20. The longitudinal length of the bottom plate portion 33 is, for example, more than half the radius of the fixture body 20.

[0051] In this embodiment, the heat dissipating fins 30 are attached to the fixture body 20 by utilizing through holes 33a provided in the bottom plate portion 33. The through holes 33a are holes through which the protrusions 22 of the fixture body 20 are inserted, and penetrate the bottom plate portion 33 in the thickness direction. The protrusions 22 of the fixture body 20 are inserted into the through holes 33a and crimped, thereby fixing the heat dissipating fins 30 to the fixture body 20. Therefore, the through holes 33a are formed with dimensions that allow the protrusions 22 to pass through before being crimped. In this way, the through holes 33a are mounting holes for attaching the heat dissipating fins 30 to the fixture body 20.

[0052] In the present embodiment, a plurality of through holes 33a are provided in the bottom plate portion 33 of the heat dissipation fin 30. Specifically, three through holes 33a are provided in the bottom plate portion 33 along the longitudinal direction of the bottom plate portion 33. The shape of the through holes 33a is not particularly limited, but as an example, the shape of the through holes 33a in a plan view is circular.

[0053] In this embodiment, a plurality of through holes 33a are provided in the bottom plate portion 33 of the heat dissipation fin 30. Specifically, three through holes 33a are provided in the bottom plate portion 33 along the longitudinal direction of the bottom plate portion 33. The plurality of through holes 33a formed in the bottom plate portion 33 are formed along the longitudinal direction of the bottom plate portion 33.

[0054] The plurality of heat dissipating fins 30 are attached to the fixture body 20 in an upright position. That is, each of the plurality of heat dissipating fins 30 is attached to the fixture body 20 in an upright position with the first side plate portion 31 and the second side plate portion 32 standing on the outer surface of the bottom of the fixture body 20. Here, a method for attaching the heat dissipating fins 30 to the fixture body 20 will be described with reference to Fig. 5. Fig. 5 is a diagram for explaining the method for attaching the heat dissipating fins 30 to the fixture body 20.

[0055] 5(a) and 5(b), the through-holes 33a of the heat dissipating fins 30 are inserted onto the protrusions 22 of the fixture body 20, and the heat dissipating fins 30 are placed on the fixture body 20. At this time, the tips of the protrusions 22 of the fixture body 20 protrude from the through-holes 33a of the heat dissipating fins 30.

[0056] Next, as shown in (c) of Figure 5, the tip of the protrusion 22 protruding from the through-hole 33a is crimped. As a result, the tip of the protrusion 22 is crushed and spread laterally, and a part of the protrusion 22 (the spread part of the protrusion 22) presses against the inner surface of the bottom plate part 33 of the heat dissipation fin 30. In other words, the bottom plate part 33 of the heat dissipation fin 30 is pressed by the part of the protrusion 22 (the crimped part) that has been deformed by crimping. This makes it possible to fix the heat dissipation fin 30 to the appliance body 20. In this way, in this embodiment, the heat dissipation fin 30 is fixed to the appliance body 20 by crimping. [Holder] The holder 40 holds the light source 10. In the present embodiment, the holder 40 is a fixing member for fixing the light source 10 to the fixture body 20. Therefore, the light source 10 is fixed to the fixture body 20 via the holder 40. Specifically, the light source 10 is fixed to the fixture body 20 by attaching the holder 40 to the fixture body 20. More specifically, the holder 40 is disposed on the light emission side of the light source 10 so as to cover the light source 10, and the light source 10 is fixed to the fixture body 20 by attaching the holder 40 to the fixture body 20 with the substrate 11 of the light source 10 sandwiched between the holder 40 and the fixture body 20.

[0057] In this embodiment, the holder 40 has two components: a frame 41 and a reflector 42. The frame 41 has the function of holding the light source 10 in the fixture body 20. The frame 41 has a plurality of springs that press the substrate 11 of the light source 10 toward the fixture body 20. The reflector 42 has the function of reflecting the light emitted from the light source 10 and making it incident on the lens 50. In other words, the reflector 42 controls the light emitted from the light source 10. The reflector 42 has a funnel-shaped reflecting portion. As described above, the holder 40 in this embodiment is an integrated reflector holder that includes the reflector 42. Therefore, the holder 40 not only functions as a fixing member that fixes the light source 10 to the fixture body 20, but also as a reflecting member that reflects the light emitted from the light source 10. As a result, simply by attaching the holder 40 to the fixture body 20, the light source 10 can be fixed and the reflector can be attached to the fixture body 20 at the same time.

[0058] The frame 41 and the reflector 42 are resin molded products made of an insulating resin material. For example, the frame 41 and the reflector 42 are made of a white resin material. This allows the surface of the reflector 42 to be a reflective surface.

[0059] In addition, the holder 40 is provided with a plurality of conductive plates. The conductive plates provided on the holder 40 receive DC power from the power supply unit. When the holder 40 is holding the light source 10, the conductive plates of the holder 40 are in contact with a pair of electrodes provided on the substrate 11 of the light source 10. By providing the conductive plates on the holder 40 in this way, the electrical connection between the light source 10 and the conductive plates of the holder 40 can be completed simply by attaching the holder 40 to the fixture body 20.

[0060] The reflector 42 of the holder 40 holds the lens 50. Specifically, the lens 50 is held by the reflector 42 by engaging a holding claw provided on the lens 50 with an engaging hole provided in the reflector 42.

[0061] [lens] The lens 50 is a translucent optical member that transmits light emitted from the light source 10. The lens 50 is arranged to cover the light source 10. In the present embodiment, the lens 50 is arranged to cover the holder 40 that is arranged on the light emission side of the light source 10. Therefore, the lens 50 receives light that is emitted from the light source 10 and travels without being reflected by the reflector 102 of the holder 40, as well as light that is emitted from the light source 10 and is reflected by the reflector 42 of the holder 40.

[0062] Lens 50 may have a light distribution control function that controls the distribution of light from light source 10. In the present embodiment, lens 50 is a condensing lens that has a function of condensing light emitted from light source 10. Specifically, lens 50 is a Fresnel lens.

[0063] The lens 50 is made of a light-transmitting material. Specifically, the lens 50 is made of a transparent resin material such as acrylic or polycarbonate, or a glass material.

[0064] It should be noted that a light-transmitting panel (light-transmitting cover) with a constant thickness may be used instead of the lens 50. In this case, the light-transmitting panel may be a diffusion panel that diffuses (scatters) the light that passes through it, or may be a transparent panel. The light-transmitting panel may also be a flat panel or a curved panel.

[0065] [Outer frame] The outer frame 60 is a frame member through which the light emitted from the lens 50 passes. The light from the light source 10 that has passed through the lens 50 passes through the outer frame 60 and is emitted to the outside of the lighting fixture 1.

[0066] In this embodiment, the outer frame 60 is a generally cylindrical frame with a bottom and a through-hole formed in the bottom. The outer frame 60 can be made of a metal material such as aluminum or a hard resin material such as polybutylene terephthalate (PBT). The outer frame 60 is fixed to the instrument body 20 by screws, for example.

[0067] The outer frame body 60 is an outer casing member of the lighting fixture 1. Therefore, the outer surface of the outer frame body 60 forms the outer surface of the lighting fixture 1. The outer frame body 60 has a flange portion that protrudes radially outward. The flange portion is provided on the edge of the opening of the outer frame body 60.

[0068] Mounting springs (not shown) are attached to the outer surface of the outer frame body 60. For example, two mounting springs are attached to the outer frame body 60. The mounting springs are elastic members for fixing the lighting fixture 1 (lamp unit) to a mounting portion such as a ceiling. As an example, the mounting springs are leaf springs made of long metal plates.

[0069] When the lighting fixture 1 (lighting unit) is disposed in the ceiling opening, the flange portion of the outer frame body 60 is engaged with the ceiling surface, the mounting spring is elastically deformed between the side surface of the outer frame body 60 and the inner surface of the ceiling opening, and the spring restoring force of the mounting spring is used to fix the lighting fixture 1 to the ceiling opening.

[0070] [Auxiliary reflector] The auxiliary reflector 70 is a reflective member that reflects incident light that has passed through the lens 50. Therefore, light does not necessarily have to be incident on the auxiliary reflector 70. In this embodiment, the auxiliary reflector 70 has a cup-shaped frame portion that is formed so that the inner diameter gradually increases.

[0071] The auxiliary reflector 70 is an inner frame disposed inside the outer frame 60 and is held by the outer frame 60. The auxiliary reflector 70 is made of a metal material such as aluminum or iron. For example, the auxiliary reflector 70 is made of sheet metal formed by pressing a metal plate. The auxiliary reflector 70 is not limited to a metal material and may be made of a resin material. In this case, the auxiliary reflector 70 may be a resin molded product made of a white resin material, or may be a resin molded product with a reflective film such as a metal film formed thereon.

[0072] [Detailed structure of heat dissipation fins] Next, the detailed structure of the heat dissipation fin 30 will be described with reference to FIGS. 1 to 4 and with reference to FIGS. 6 to 11. FIG. 6 is a perspective view of the heat dissipation fin 30 according to the embodiment. FIG. 7 is a perspective view of the heat dissipation fin 30 as viewed from below. FIG. 8 is a diagram showing the configuration of the heat dissipation fin 30. FIG. 9 is a cross-sectional perspective view of the heat dissipation fin 30. FIG. 10 is an enlarged view of an upper corner portion of the heat dissipation fin 30. FIG. 11 is an enlarged view of a lower corner portion of the heat dissipation fin 30. In FIG. 8, (a) is a front view, (b) is a left side view (view of the first side plate portion 31 side), (c) is a right side view (view of the second side plate portion 32 side), (d) is a rear view, (e) is a top view, and (f) is a bottom view.

[0073] 6 to 11, the heat dissipation fin 30 has a plate-shaped first side plate portion 31, a plate-shaped second side plate portion 32, and a plate-shaped bottom plate portion 33. The first side plate portion 31 and the second side plate portion 32 are formed to stand upright from the bottom plate portion 33.

[0074] The first side plate 31 and the second side plate 32 are a pair of side plates that are formed to face each other at a distance. Therefore, the first side plate 31 faces the second side plate 32, and the second side plate 32 faces the first side plate 31.

[0075] As shown in FIGS. 6 to 8, the first side edge portion 31 has four sides: a first side edge 31a, a second side edge 31b, a bottom edge 31c, and a top edge 31d. The second side edge portion 32 has four sides: a first side edge 32a, a second side edge 32b, a bottom edge 32c, and a top edge 32d. In this embodiment, the main surfaces of the first side plate portion 31 and the second side plate portion 32 are generally rectangular overall, but this is not limiting. In this embodiment, the first side plate portion 31 and the second side plate portion 32 have the same shape and size, but this is not limiting.

[0076] The first side plate portion 31 and the second side plate portion 32 are arranged so that their opposing main surfaces are parallel to each other. However, the main surfaces of the first side plate portion 31 and the second side plate portion 32 do not have to be parallel to each other.

[0077] The bottom plate portion 33 is connected to the bottom side of at least one of the first side plate portion 31 and the second side plate portion 32, and is disposed between the first side plate portion 31 and the second side plate portion 32. As shown in FIGS. 7 and 8, in this embodiment, the bottom plate portion 33 is connected to both the first side plate portion 31 and the second side plate portion 32. The bottom plate portion 33 is also connected to the bottom side 31c of the first side plate portion 31 and the bottom side 32c of the second side plate portion 32. The width of the bottom plate portion 33 is the distance between the bottom side of the first side plate portion 31 and the bottom side of the second side plate portion 32. In this embodiment, the bottom plate portion 33 is elongated. As described above, the bottom plate portion 33 has one or more through holes 33a.

[0078] The first side plate 31, the second side plate 32, and the bottom plate 33 are formed by bending a metal plate. That is, the connection portion between the first side plate 31 and the bottom plate 33 and the connection portion between the second side plate 32 and the bottom plate 33 are formed by bending the metal plate. As shown in FIGS. 6 to 8 , in this embodiment, the first side plate 31, the second side plate 32, and the bottom plate 33 are formed to have a substantially U-shaped cross section. Specifically, the angle between the main surface of the first side plate 31 and the main surface of the bottom plate 33 is substantially 90 degrees, and the angle between the main surface of the second side plate 32 and the main surface of the bottom plate 33 is also substantially 90 degrees. That is, the first side plate 31 and the bottom plate 33 are formed to have an L-shaped cross section. Similarly, the second side plate 32 and the bottom plate 33 are formed to have an L-shaped cross section. The connecting portion between the first side plate portion 31 and the bottom plate portion 33 may be curved, and the connecting portion between the second side plate portion 32 and the bottom plate portion 33 may also be curved. Furthermore, the first side plate portion 31, the second side plate portion 32, and the bottom plate portion 33 may not be formed from a single metal plate, but may be formed by joining multiple metal plates together.

[0079] 6 to 8, the heat dissipation fin 30 has a first connecting piece 81 connected to the first side plate portion 31 and a second connecting piece 82 connected to the second side plate portion 32. The first connecting piece 81 and the second connecting piece 82 extend toward each other from the opposing side edges of the pair of side plate portions, that is, the first side plate portion 31 and the second side plate portion 32. In this embodiment, the first connecting piece 81 and the second connecting piece 82 are provided on one side in the longitudinal direction of the bottom plate portion 33 when viewed from above.

[0080] Specifically, the first connecting piece 81 extends from the first side edge 31a of the first side plate portion 31 toward the first side edge 32a of the second side plate portion 32. The first connecting piece 81 is a bent piece formed by bending a part of a metal plate at the first side edge 31a of the first side plate portion 31 by 90 degrees.

[0081] The second connecting piece 82 extends from the first side edge 32a of the second side plate portion 32 toward the first side edge 31a of the first side plate portion 31. The second connecting piece 82 is a bent piece formed by bending a part of a metal plate at the first side edge 32a of the second side plate portion 32 by 90 degrees.

[0082] The first side plate portion 31 and the second side plate portion 32 are connected by interlocking a first connecting piece 81 and a second connecting piece 82. The first connecting piece 81 and the second connecting piece 82 interlock with each other as a pair of connecting pieces. The first connecting piece 81 and the second connecting piece 82 at least partially overlap. In this embodiment, the second connecting piece 82 is located outward from the first connecting piece 81. In other words, the first connecting piece 81 is located inward from the second connecting piece 82. The first connecting piece 81 and the second connecting piece 82 may also overlap such that the first connecting piece 81 is located outward from the second connecting piece 82.

[0083] Furthermore, in this embodiment, the first connecting piece 81 and the second connecting piece 82 are in contact with each other, but the first connecting piece 81 and the second connecting piece 82 may not be in contact with each other at all. For example, the first connecting piece 81 and the second connecting piece 82 may be in contact with each other at the interlocking portion and / or at portions other than the interlocking portion. Furthermore, even in the interlocking portion of the first connecting piece 81 and the second connecting piece 82, there may be a portion where they are not in contact with each other. In this case, it is preferable that the first connecting piece 81 and the second connecting piece 82 are arranged close to each other at the interlocking portion of the first connecting piece 81 and the second connecting piece 82.

[0084] In this way, in the heat dissipation fin 30 according to the present embodiment, the first connecting piece 81 and the second connecting piece 82 extending toward each other are interlocked to connect the first side plate portion 31 and the second side plate portion 32. In other words, the heat dissipation fin 30 has a connecting structure in which the first connecting piece 81 and the second connecting piece 82 are connected to each other.

[0085] Forming such a connecting structure in the heat dissipating fins 30 increases the rigidity of the heat dissipating fins 30, so that high rigidity can be obtained even when the heat dissipating fins 30 are made of metal plates. In particular, even when the thickness of the metal plates making up the heat dissipating fins 30 is reduced to less than 1 mm or when aluminum plates, which have relatively low strength, are used as the metal plates, the heat dissipating fins 30 can still have excellent rigidity. This makes it possible to prevent the heat dissipating fins 30 from deforming. Furthermore, using thin metal plates reduces the material cost of the heat dissipating fins 30.

[0086] Furthermore, by using heat dissipation fins 30 with high rigidity as in this embodiment, the interval (distance) between two adjacent heat dissipation fins 30 can be increased. In other words, as shown in FIG. 2, if the interval (distance) between two adjacent heat dissipation fins is short, even if one of the two adjacent heat dissipation fins falls over, the two adjacent heat dissipation fins will support each other, so the rigidity of the heat dissipation fins does not need to be very high. However, by using a single heat dissipation fin 30 with high rigidity as in this embodiment, strength can be maintained with a single heat dissipation fin 30, so some of the multiple heat dissipation fins 30 shown in FIG. 2 can be thinned out (e.g., reduced to seven). In this way, increasing the rigidity of the heat dissipation fins 30 increases the degree of freedom in the layout of the heat dissipation fins 30 arranged on the appliance body 20. Furthermore, by thinning out the multiple heat dissipation fins 30 and reducing the number of heat dissipation fins 30, the costs associated with the heat dissipation fins 30 can be reduced.

[0087] In this embodiment, the first connecting piece 81 is provided in the upper half of the first side plate portion 31, and the second connecting piece 82 is provided in the upper half of the second side plate portion 32. In other words, the first connecting piece 81 and the second connecting piece 82 are provided in the portion (upper portion) opposite to the portion (lower portion) on the side of the appliance main body 20 where the heat dissipation fin 30 is attached.

[0088] This configuration can effectively increase the rigidity of the heat dissipation fins 30. In other words, the heat dissipation fins 30 that are fixed upright to the appliance body 20 have weak strength in the portion (upper portion) opposite to the appliance body 20 side, but by providing the first connecting piece 81 and the second connecting piece 82 that interlock with each other in the upper half regions of the first side plate portion 31 and the second side plate portion 32, the rigidity of the heat dissipation fins 30 in the vertical direction can be increased in a balanced manner.

[0089] 6 to 10, the first connecting piece 81 and the second connecting piece 82 are combined to restrict movement of the second connecting piece 82 in a direction away from the bottom plate portion 33 of the heat dissipation fin 30. Specifically, the first connecting piece 81 has a first combined portion 81a that presses the second connecting piece 82 in a direction toward the bottom plate portion 33, thereby restricting movement of the second connecting piece 82 in a direction away from the bottom plate portion 33.

[0090] With this configuration, the movement of the second connecting piece 82 is restricted by the first connecting piece 81, so that the rigidity of the heat dissipating fin 30 can be further increased.

[0091] In this embodiment, the first combined portion 81a of the first connecting piece 81 is a bent piece that is bent so as to cover the upper edge of the second connecting piece 82. The first combined portion 81a is formed by bending a portion of a metal plate 180 degrees. Therefore, the first combined portion 81a is structured to sandwich the upper end portion of the second connecting piece 82.

[0092] This allows the first combination portion 81a of the first connecting piece 81 to press the second connecting piece 82 in the direction toward the bottom plate portion 33, thereby restricting the second connecting piece 82 from moving in the direction away from the bottom plate portion 33.

[0093] The second connecting piece 82 also prevents the first side plate 31 and the second side plate 32 from moving away from each other. Specifically, the second connecting piece 82 has a second combination portion 82a that combines with the first combination portion 81a of the first connecting piece 81 to prevent the first side plate 31 and the second side plate 32 from moving away from each other.

[0094] With this configuration, the first connecting piece 81 and the second connecting piece 82 are interlocked together to restrict the movement of the first connecting piece 81, so that the rigidity of the heat dissipating fin 30 can be further increased.

[0095] In the present embodiment, the second combined portion 82a of the second connecting piece 82 is located to the side of the first combined portion 81a of the first connecting piece 81, and is a protruding piece that protrudes upward beyond the first combined portion 81a (first connecting piece 81). Specifically, the second combined portion 82a, which is a protruding piece, is located closer to the first side plate 31 than the first combined portion 81a, which is a bent piece. As a result, the edge of the second combined portion 82a, which is a protruding piece, on the second side plate 32 side (the right side in FIG. 6) abuts against the edge of the first combined portion 81a, which is a bent piece, on the first side plate 31 side (the left side in FIG. 6).

[0096] This configuration can restrict the first side plate portion 31 and the second side plate portion 32 from moving in directions away from each other.

[0097] 8 and 9, the heat dissipation fin 30 in this embodiment has a third connecting piece 83 connected to the first side plate portion 31 and a fourth connecting piece 84 connected to the second side plate portion 32. In this embodiment, the third connecting piece 83 and the fourth connecting piece 84 are provided on the other side in the longitudinal direction of the bottom plate portion 33 in a top view. In other words, the third connecting piece 83 and the fourth connecting piece 84 are provided in a position facing away from the first connecting piece 81 and the second connecting piece 82.

[0098] Similar to the first connecting piece 81 and the second connecting piece 82, the third connecting piece 83 and the fourth connecting piece 84 extend from the opposing side edges of the first side plate portion 31 and the second side plate portion 32 toward each other.

[0099] Specifically, the third connecting piece 83 extends from the second side edge 31b of the first side plate portion 31 toward the second side edge 32b of the second side plate portion 32. The third connecting piece 83 is a bent piece formed by bending a part of a metal plate at the second side edge 31b of the first side plate portion 31 by 90 degrees.

[0100] The fourth connecting piece 84 extends from the second side edge 32b of the second side plate portion 32 toward the second side edge 31b of the first side plate portion 31. The fourth connecting piece 84 is a bent piece formed by bending a part of a metal plate at the second side edge 32b of the second side plate portion 32 by 90 degrees.

[0101] The first side plate portion 31 and the second side plate portion 32 are also connected by the third connecting piece 83 and the fourth connecting piece 84 being interlocked with each other. The third connecting piece 83 and the fourth connecting piece 84 are interlocked with each other as a pair of connecting pieces, similar to the first connecting piece 81 and the second connecting piece 82. The third connecting piece 83 and the fourth connecting piece 84 also at least partially overlap with each other. In this embodiment, the third connecting piece 83 is positioned outward from the fourth connecting piece 84. In other words, the fourth connecting piece 84 is positioned inward from the third connecting piece 83. The third connecting piece 83 and the fourth connecting piece 84 may also overlap with each other such that the fourth connecting piece 84 is positioned outward from the third connecting piece 83.

[0102] Furthermore, in the present embodiment, the third connecting piece 83 and the fourth connecting piece 84 are in contact with each other, but the third connecting piece 83 and the fourth connecting piece 84 do not have to be in contact with each other. In this case, it is preferable that the third connecting piece 83 and the fourth connecting piece 84 are disposed close to each other.

[0103] As described above, in the heat dissipation fin 30 according to the present embodiment, the first connecting piece 81 and the second connecting piece 82 are interlocked with each other, and the third connecting piece 83 and the fourth connecting piece 84 are interlocked with each other, thereby connecting the first side plate 31 and the second side plate 32. That is, the heat dissipation fin 30 has, in addition to a first connecting structure connecting the first connecting piece 81 and the second connecting piece 82, a second connecting structure connecting the third connecting piece 83 and the fourth connecting piece 84, and the first connecting structure and the second connecting structure are arranged back to back with the first side plate 31 and the second side plate 32 sandwiched therebetween.

[0104] This configuration can significantly increase the rigidity of the heat dissipation fin 30 compared to when only the first connecting piece 81 and the second connecting piece 82 are connected. In addition, in this embodiment, the third connecting piece 83, like the first connecting piece 81, is provided in the upper half of the first side plate portion 31, and the fourth connecting piece 84, like the second connecting piece 82, is provided in the upper half of the second side plate portion 32.

[0105] This configuration can effectively increase the rigidity of the radiation fins 30. That is, the rigidity of the radiation fins 30 in the vertical direction can be increased in a well-balanced manner.

[0106] In addition, in this embodiment, the third connecting piece 83 bent from the first side plate portion 31 has the same shape as the second connecting piece 82 bent from the second side plate portion 32, and the fourth connecting piece 84 bent from the second side plate portion 32 has the same shape as the first connecting piece 81 bent from the first side plate portion 31.

[0107] Therefore, the third connecting piece 83 has a protruding piece that protrudes above the fourth connecting piece 84 as a third combined portion 83a that restricts the first side plate portion 31 and the second side plate portion 32 from moving in a direction away from each other. The fourth connecting piece 84 also has a bent piece that is bent to cover the upper edge of the third connecting piece 83 as a fourth combined portion 84a that restricts the third connecting piece 83 from moving in a direction away from the bottom plate portion 33 by pressing the third connecting piece 83 in a direction toward the bottom plate portion 33.

[0108] As a result, the fourth combination portion 84a of the fourth connection piece 84 can press the third connection piece 83 in the direction toward the bottom plate portion 33, thereby restricting movement of the third connection piece 83. It also restricts movement of the first side plate portion 31 and the second side plate portion 32 in directions away from each other. The third combination portion 83a (protruding piece) of the third connection piece 83 is located closer to the second side plate portion 32 than the fourth combination portion 84a (bent piece) of the fourth connection piece 84.

[0109] Furthermore, the third connecting piece 83 is the same as the second connecting piece 82 not only in shape but also in size. The fourth connecting piece 84 is the same as the first connecting piece 81 not only in shape but also in size. The size and shape of the third connecting piece 83 may be different from the size and shape of the second connecting piece 82, and the size and shape of the fourth connecting piece 84 may be different from the size and shape of the first connecting piece 81.

[0110] 6 to 8 and 11, the heat dissipation fin 30 according to this embodiment has a first protruding piece 85 extending from the first side edge 31a of the first side plate portion 31 toward the first side edge 32a of the second side plate portion 32, and a second protruding piece 86 extending from the first side edge 32a of the second side plate portion 32 toward the first side edge 31a of the first side plate portion 31. The first protruding piece 85 is a bent piece formed by bending a part of a metal plate at the first side edge 31a of the first side plate portion 31 by 90 degrees. The second protruding piece 86 is a bent piece formed by bending a part of a metal plate at the first side edge 32a of the second side plate portion 32 by 90 degrees.

[0111] In this embodiment, the first protruding piece 85 and the second protruding piece 86 at least partially overlap. In this embodiment, the second protruding piece 86 is located outward from the first protruding piece 85. In other words, the first protruding piece 85 is located inward from the second protruding piece 86. Note that the first protruding piece 85 and the second protruding piece 86 may also overlap such that the first protruding piece 85 is located outward from the second protruding piece 86.

[0112] The first protruding piece 85 is provided in the lower half of the first side plate portion 31, and the second protruding piece 86 is provided in the lower half of the second side plate portion 32. In other words, the first protruding piece 85 and the second protruding piece 86 are provided below the first connecting piece 81 and the second connecting piece 82.

[0113] In this way, by providing the first protruding piece 85 and the second protruding piece 86 in addition to the first connecting piece 81 and the second connecting piece 82, the rigidity of the heat dissipating fin 30 can be further increased.

[0114] Furthermore, the lower end of the first protruding piece 85 is located on the bottom plate portion 33. Specifically, the lower end of the first protruding piece 85 is close to or in contact with the surface of the bottom plate portion 33. Similarly, the lower end of the second protruding piece 86 is located on the bottom plate portion 33. Specifically, the lower end of the second protruding piece 86 is close to or in contact with the surface of the bottom plate portion 33. This configuration can further increase the rigidity of the heat dissipation fin 30. Furthermore, by having the first protruding piece 85 and the second protruding piece 86 close to or in contact with the bottom plate portion 33, the accuracy of the heat dissipation fin 30 relative to the fixture body 20 can be improved compared to a configuration in which the protruding pieces protrude outward and the fixture body 20 supports the posture of the heat dissipation fin (for example, a configuration in which the first bent piece 91A and the second bent piece 92A in FIG. 12 described later are extended to the bottom plate portion 33). This is because the bottom plate portion 33 is a component of the heat dissipation fin 30 itself, and therefore processing the heat dissipation fin 30 so that the first protruding piece 85 and the second protruding piece 86 are close to or in contact with the bottom plate portion 33 is easier than processing the heat dissipation fin so that it contacts the fixture main body 20 with precision.

[0115] 6 to 8, the heat dissipation fin 30 has a first bent piece 91 extending along the first side edge 31a of the first side plate portion 31, and a second bent piece 92 extending along the first side edge 32a of the second side plate portion 32. The first bent piece 91 and the second bent piece 92 are formed by bending a part of a metal plate by 90 degrees.

[0116] In this embodiment, the first bent piece 91 extends from the first protruding piece 85 toward the first connecting piece 81. The second bent piece 92 extends from the second protruding piece 86 toward the second connecting piece 82. In this embodiment, the first bent piece 91 and the second bent piece 92 are formed to face each other but do not overlap. In other words, a slit-shaped space gap exists between the first bent piece 91 and the second bent piece 92.

[0117] By providing the first bent piece 91 and the second bent piece 92 in this manner, the rigidity of the heat dissipating fin 30 can be further increased.

[0118] 8 and 9 , the heat dissipation fin 30 according to this embodiment has a third protruding piece 87 extending from the second side edge 31 b of the first side plate 31 toward the second side edge 32 b of the second side plate 32, and a fourth protruding piece 88 extending from the second side edge 32 b of the second side plate 32 toward the second side edge 31 b of the first side plate 31. The third protruding piece 87 is a bent piece formed by bending a part of a metal plate by 90 degrees at the second side edge 31 b of the first side plate 31. The fourth protruding piece 88 is a bent piece formed by bending a part of a metal plate by 90 degrees at the second side edge 32 b of the second side plate 32.

[0119] In this embodiment, the third protruding piece 87 and the fourth protruding piece 88 at least partially overlap. In this embodiment, the third protruding piece 87 is located outward from the fourth protruding piece 88. In other words, the fourth protruding piece 88 is located inward from the third protruding piece 87. Note that the third protruding piece 87 and the fourth protruding piece 88 may also overlap such that the fourth protruding piece 88 is located outward from the third protruding piece 87.

[0120] The third protruding piece 87 is provided in the lower half of the first side plate portion 31, and the fourth protruding piece 88 is provided in the lower half of the second side plate portion 32. In other words, the third protruding piece 87 and the fourth protruding piece 88 are provided below the third connecting piece 83 and the fourth connecting piece 84.

[0121] By providing the third protruding piece 87 and the fourth protruding piece 88 in this manner, the rigidity of the heat dissipating fin 30 can be further increased.

[0122] Furthermore, the lower end of the third protruding piece 87 is located on the bottom plate portion 33, similar to the lower end of the first protruding piece 85. Specifically, the lower end of the third protruding piece 87 is close to or in contact with the surface of the bottom plate portion 33. Similarly, the lower end of the fourth protruding piece 88 is located on the bottom plate portion 33, similar to the lower end of the second protruding piece 86. Specifically, the lower end of the fourth protruding piece 88 is close to or in contact with the surface of the bottom plate portion 33. This configuration can further increase the rigidity of the heat dissipation fin 30.

[0123] In addition, in this embodiment, the shape and size of the third protruding piece 87 are the same as the shape and size of the second protruding piece 86, and the shape and size of the fourth protruding piece 88 are the same as the shape and size of the first protruding piece 85, but this is not limited to this.

[0124] 8, the heat dissipation fin 30 has a third bent piece 93 extending along the second side edge 31b of the first side plate portion 31, and a fourth bent piece 94 extending along the second side edge 32b of the second side plate portion 32. The third bent piece 93 and the fourth bent piece 94 are formed by bending a portion of a metal plate by 90 degrees.

[0125] In this embodiment, the third bent piece 93 extends from the third protruding piece 87 toward the third connecting piece 83. The fourth bent piece 94 extends from the fourth protruding piece 88 toward the fourth connecting piece 84. In this embodiment, the third bent piece 93 and the fourth bent piece 94 are formed to face each other but do not overlap. In other words, a slit-shaped space gap exists between the third bent piece 93 and the fourth bent piece 94.

[0126] By providing the third bent piece 93 and the fourth bent piece 94 in this way, the rigidity of the heat dissipating fin 30 can be further increased.

[0127] The third bending piece 93 faces the first bending piece 91 in the longitudinal direction of the bottom plate portion 33, and the fourth bending piece 94 faces the second bending piece 92 in the longitudinal direction of the bottom plate portion 33. The shape and size of the third bending piece 93 are the same as the shape and size of the first bending piece 91, and the shape and size of the fourth bending piece 94 are the same as the shape and size of the second bending piece 92, but are not limited to this.

[0128] The heat dissipation fin 30 also has a fifth bent piece 95 extending along the upper edge 31d of the first side plate portion 31 and a sixth bent piece 96 extending along the upper edge 32d of the second side plate portion 32. The fifth bent piece 95 and the sixth bent piece 96 are formed by bending a portion of a metal plate by 90 degrees.

[0129] By providing the fifth bent piece 95 and the sixth bent piece 96 in this way, the rigidity of the heat dissipating fin 30 can be further increased.

[0130] The heat dissipation fin 30 configured as above has the same shape when viewed from the front and rear, as shown in FIG.

[0131] (Variation) Although the heat dissipation member and the lighting fixture according to the present invention have been described above based on the embodiments, the present invention is not limited to the above-described embodiments.

[0132] For example, in the above embodiment, the first to fourth connecting pieces 81 to 84, the first to fourth protruding pieces 85 to 88, and the first to sixth bent pieces 91 to 96 are all bent inward, but this is not limiting. For example, they may be bent outward like the first bent piece 91A and the second bent piece 92A in the heat dissipation fin 30A shown in Figures 12 to 14.

[0133] In the above embodiment, the first bent piece 91 to the sixth bent piece 96 are all provided on one of the four sides of the first side plate 31 and the second side plate 32, and all of the bent pieces in the heat dissipation fin 30 are provided on one of the four sides of the first side plate 31 and the second side plate 32, but this is not limiting. For example, like the seventh bent piece 97 and the eighth bent piece 98 in the heat dissipation fin 30A shown in Figures 12 to 14, the bent pieces may be formed by cutting out and raising parts of the surfaces of the first side plate 31 and the second side plate 32.

[0134] Furthermore, in the above embodiment, the first connecting piece 81 and the second connecting piece 82 are interlocked to restrict movement of the second connecting piece 82 in a direction away from the bottom plate portion 33 of the heat dissipation fin 30. However, this is not limited to this. For example, the first connecting piece 81 and the second connecting piece 82 may be interlocked to restrict movement of the second connecting piece 82 in a direction toward the bottom plate portion 33 of the heat dissipation fin 30. Alternatively, the first connecting piece 81 and the second connecting piece 82 may be interlocked to restrict movement of the first connecting piece 81 in a direction away from the bottom plate portion 33 of the heat dissipation fin 30, or to restrict movement of the first connecting piece 81 in a direction toward the bottom plate portion 33 of the heat dissipation fin 30. In other words, it is only necessary that the first connecting piece 81 and the second connecting piece 82 are interlocked to restrict movement of at least one of the direction toward the bottom plate portion 33 of the heat dissipation fin 30 and the direction away from the bottom plate portion 33 of the heat dissipation fin 30. Specifically, one of the first connecting piece 81 and the second connecting piece 82 may have a first combination portion that restricts the movement of the other of the first connecting piece 81 and the second connecting piece 82 by pressing the other of the first connecting piece 81 and the second connecting piece 82 in a direction toward the bottom plate portion 33 of the heat dissipation fin 30 or in a direction away from the bottom plate portion 33 of the heat dissipation fin 30.

[0135] Furthermore, in the above embodiment, the second connecting piece 82 restricts the first side plate portion 31 and the second side plate portion 32 from moving away from each other. However, this is not limited to this. For example, the first connecting piece 81 may restrict the first side plate portion 31 and the second side plate portion 32 from moving away from each other. That is, it is sufficient that at least one of the first connecting piece 81 and the second connecting piece 82 restricts the first side plate portion 31 and the second side plate portion 32 from moving away from each other. Specifically, it is sufficient that the other of the first connecting piece 81 and the second connecting piece 82 has a second combination portion that combines with a first combination portion of one of the first connecting piece 81 and the second connecting piece 82 to restrict the first side plate portion 31 and the second side plate portion 32 from moving away from each other.

[0136] In the above embodiment, the heat dissipation fin 30 includes a first combination set in which the first connecting piece 81 and the second connecting piece 82 are combined together, and thereby at least one of the first connecting piece 81 and the second connecting piece 82 is pressed in a direction toward the bottom plate portion 33 (bottom) of the heat dissipation fin 30; and a second combination set in which at least one of the first connecting piece 81 and the second connecting piece 82 is moved away from the bottom plate portion 33 (bottom) of the heat dissipation fin 30. R In other words, the heat dissipation fin 30 may have, for a pair of side plate portions, the first side plate portion 31 and the second side plate portion 32, a pair of combination sets in which a connecting piece extending from one side plate portion is pressed in a direction toward the bottom plate portion 33, and a pair of combination sets in which a connecting piece extending from one side plate portion is pressed in a direction away from the bottom plate portion 33, relative to a pair of connecting pieces extending from the other side plate portion. In this case, both combination sets may be formed on one connecting piece extending from one side edge of the first side plate portion 31 and the second side plate portion 32, or one combination set may be formed on one connecting piece, and the connecting piece may be formed on both side edges of the first side plate portion 31 and the second side plate portion 32.

[0137] In the above-described embodiment, the light source 10 may be configured to be capable of adjusting the brightness and color. For example, the light-emitting unit 12 of the light source 10 may include multiple types of LEDs that emit light of different color temperatures.

[0138] In the above embodiment, the light source 10 is configured to emit white light using a blue LED chip and a yellow phosphor, but this is not limiting. For example, the light source 10 may be configured to emit white light by combining a phosphor-containing resin containing red and green phosphors with a blue LED chip.

[0139] In the above embodiment, a blue LED chip is used as the LED, but this is not limiting. For example, an LED chip that emits a color other than blue may be used as the LED. In this case, the phosphor may be selected appropriately depending on the emission wavelength of the LED.

[0140] In the above embodiment, the light source 10 is an LED module with a COB structure in which an LED chip is directly mounted on a substrate, but this is not limiting. For example, an LED module with an SMD (Surface Mount Device) structure may be used as the light source 10. An SMD-structure LED module can be realized by mounting one or more SMD-type light-emitting elements as the light-emitting unit 12 on the substrate 11. An SMD-type light-emitting element is a packaged LED element having, for example, a resin or ceramic package (container), an LED chip mounted in a recess in the package, and a sealing member (phosphor-containing resin or transparent resin) sealed in the recess in the package.

[0141] Furthermore, the lighting fixtures in the above-described embodiments may be installed on mounting locations other than ceilings. Furthermore, the present invention may be applied to lighting fixtures other than recessed lighting fixtures such as downlights, and may be applied to lighting fixtures other than downlights.

[0142] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art would think of, and forms realized by arbitrarily combining the components and functions of each embodiment within the scope of the present invention. [Explanation of symbols]

[0143] 1. Lighting equipment 20. Instrument body 30, 30A heat sink 31 First side plate part 31a, 32a 1st side 31b, 32b 2nd side 32 Second side plate part 33 Bottom plate part 81 1st connection piece 81a 1st Union Division 82 Second connection piece 82a 2nd Union Division 83 Third connection piece 84 4th connecting piece 85 1st protruding piece 86 Second prominent piece

Claims

1. A heat dissipation member having a bottom portion attached to a base, a first side plate portion having a first side edge and a bottom edge; a second side plate portion having a first side edge and a bottom edge and facing the first side plate portion; a first connecting piece extending from the first side edge of the first side plate portion toward the first side edge of the second side plate portion; a second connecting piece extending from the first side edge of the second side plate portion toward the first side edge of the first side plate portion, the bottom edge of the first side plate portion and the bottom edge of the second side plate portion are each connected to the bottom portion; The first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece being interlocked with each other. Heat dissipation material.

2. The first connecting piece and the second connecting piece are interlocked to restrict movement of at least one of the first connecting piece and the second connecting piece in at least one of a direction toward the bottom of the heat dissipation member and a direction away from the bottom of the heat dissipation member. The heat dissipation member according to claim 1 .

3. A heat dissipation member having a bottom attached to a base, a first side plate portion; a second side plate portion facing the first side plate portion; a first connecting piece extending from a first side edge of the first side plate portion toward a first side edge of the second side plate portion; a second connecting piece extending from a first side edge of the second side plate portion toward a first side edge of the first side plate portion, the first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece being interlocked with each other, the first connecting piece and the second connecting piece are combined to restrict movement of at least one of the first connecting piece and the second connecting piece in at least one direction toward the bottom of the heat dissipation member and away from the bottom of the heat dissipation member, At least one of the first connecting piece and the second connecting piece restricts the first side plate portion and the second side plate portion from moving in a direction away from each other. Heat dissipation material.

4. one of the first connecting piece and the second connecting piece has a first combining portion that restricts movement of the other of the first connecting piece and the second connecting piece by pressing the other of the first connecting piece in a direction toward the bottom of the heat dissipation member or in a direction away from the bottom of the heat dissipation member, the other of the first connecting piece and the second connecting piece has a second combining portion that combines with the first combining portion to restrict movement of the first side plate portion and the second side plate portion in directions away from each other; The heat dissipation member according to claim 3 .

5. the first connecting piece has the first combination portion, the second connecting piece has the second combination portion, The second combined portion is located closer to the first side plate portion than the first combined portion. The heat dissipation member according to claim 4 .

6. A heat dissipation member having a bottom attached to a base, a first side plate portion; a second side plate portion facing the first side plate portion; a first connecting piece extending from a first side edge of the first side plate portion toward a first side edge of the second side plate portion; a second connecting piece extending from a first side edge of the second side plate portion toward a first side edge of the first side plate portion, the first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece being interlocked with each other, The heat dissipation member has a first combination set in which the first connecting piece and the second connecting piece are combined to press at least one of the first connecting piece and the second connecting piece in a direction toward the bottom of the heat dissipation member, and a second combination set in which at least one of the first connecting piece and the second connecting piece is pressed in a direction away from the bottom of the heat dissipation member. Heat dissipation material.

7. A heat dissipation member having a bottom attached to a base, a first side plate portion; a second side plate portion facing the first side plate portion; a first connecting piece extending from a first side edge of the first side plate portion toward a first side edge of the second side plate portion; a second connecting piece extending from a first side edge of the second side plate portion toward a first side edge of the first side plate portion, the first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece being interlocked with each other, the first connecting piece is provided in an upper half region of the first side plate portion, The second connecting piece is provided in an upper half region of the second side plate portion. Heat dissipation material.

8. a third connecting piece extending from the second side edge of the first side plate portion toward the second side edge of the second side plate portion; a fourth connecting piece extending from the second side edge of the second side plate portion toward the second side edge of the first side plate portion, the third connecting piece has the same shape as the second connecting piece, The fourth connecting piece has the same shape as the first connecting piece. The heat dissipation member according to any one of claims 1 to 7.

9. A heat dissipation member having a bottom attached to a base, a first side plate portion; a second side plate portion facing the first side plate portion; a first connecting piece extending from a first side edge of the first side plate portion toward a first side edge of the second side plate portion; a second connecting piece extending from a first side edge of the second side plate portion toward a first side edge of the first side plate portion, the first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece being interlocked with each other, a third connecting piece extending from the second side edge of the first side plate portion toward the second side edge of the second side plate portion; a fourth connecting piece extending from the second side edge of the second side plate portion toward the second side edge of the first side plate portion, the third connecting piece has the same shape as the second connecting piece, the fourth connecting piece has the same shape as the first connecting piece, the third connecting piece is provided in an upper half region of the first side plate portion, The fourth connecting piece is provided in an upper half region of the second side plate portion. Heat dissipation material.

10. A heat dissipation member having a bottom portion attached to a base, a first side plate portion; a second side plate portion facing the first side plate portion; a first connecting piece extending from a first side edge of the first side plate portion toward a first side edge of the second side plate portion; a second connecting piece extending from a first side edge of the second side plate portion toward a first side edge of the first side plate portion, the first side plate portion and the second side plate portion are connected by the first connecting piece and the second connecting piece being interlocked with each other, a bottom plate portion connected to a bottom edge of at least one of the first side plate portion and the second side plate portion and disposed between the first side plate portion and the second side plate portion; a first protruding piece extending from the first side edge of the first side plate portion toward the first side edge of the second side plate portion, The lower end of the first protruding piece is located on the bottom plate portion. Heat dissipation material.

11. a second protruding piece extending from the first side edge of the second side plate portion toward the first side edge of the first side plate portion; The first protruding piece and the second protruding piece are at least partially overlapped with each other. The heat dissipation member according to claim 10.

12. The heat dissipation member according to any one of claims 1 to 11, A base on which the heat dissipation member is attached. Lighting fixtures.

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