JP2020053304A - Lighting device and mobile body - Google Patents

Abstract

To provide a lighting device hardly causing thermal deterioration even when downsized.SOLUTION: A lighting device 1 includes: a base 10 having fins 11; a light source module fixed to the base 10 and including a substrate and at least one light-emitting element; a reflector reflecting at least part of light emitted from the light source module frontward in an X-direction; and a projection lens projecting the light from the reflector to the light irradiation side. The fins 11 are disposed on a side opposite to the light-emitting element side of the base 10 with respect to a Z-direction. The base 10 has a slanted surface moving to the side of the fins 11 in the Z-direction as going rearward, and the substrate extends so as to be along the slanted surface. At least part of an edge part 33 located at the rear side in the reflector 30 faces the base 10 in the Z-direction at an interval, so that a separation part 56 allowing air to flow between the outside region and an element disposition region where the light-emitting elements are covered with the reflector 30 and the base 10, is provided on the rear side.SELECTED DRAWING: Figure 5

Description

  The present disclosure relates to a lighting device and a moving object including the same.

  2. Description of the Related Art Conventionally, as an illumination device, there is an illumination device described in Patent Literature 1. This illumination device is used as a headlight, and includes a light source that emits light, a reflector that reflects light emitted from the light source, and a projection lens that projects light from the reflector to an irradiation side.

JP 2018-88319 A

  When the size of the lighting device is reduced, the heat generated by the light source is likely to be trapped around the light source, and the deterioration of the lighting device is likely to occur.

  Therefore, an object of the present disclosure is to provide a lighting device that is unlikely to undergo thermal deterioration even when the lighting device is downsized.

  In order to solve the above problems, a lighting device according to the present disclosure includes a base having a heat radiating portion, a light source module fixed to the base and including a substrate, and one or more light emitting elements mounted on the substrate, and a light source module. A reflector that reflects at least a part of the emitted light to the front side in the front-rear direction that is the light irradiation side, and a projection lens that projects light from the reflector to the light irradiation side, and a heat radiating unit is disposed in the height direction. The base is arranged on the side opposite to the light emitting element side, and the base has an inclined surface that moves toward the heat radiating portion side in the height direction toward the rear side, and the substrate extends along the inclined surface. At least a part of the rear end of the reflector faces at least one of the substrate and the base at an interval in the height direction, so that the reflector and the base emit light. An element arrangement area child is covered, spaced portions that allow the flow of air between the outer region is provided on the rear side.

  According to the present disclosure, it is possible to realize a lighting device in which thermal degradation hardly occurs even when the lighting device is downsized.

1 is a perspective view of a main part of a lighting device according to an embodiment of the present disclosure. It is a perspective view which shows the assembly which removed the reflector, the projection lens, etc. from the said main part. FIG. 2 is a perspective view of the main part when viewed from an angle different from the perspective view shown in FIG. 1. FIG. 2 is a schematic diagram illustrating a part of a schematic cross-sectional view taken along line AA of FIG. 1, and is a schematic diagram illustrating a positional relationship among a light emitting element, an upper surface of a reflector, a shade, and a projection lens. It is a perspective view when the above-mentioned lighting installation is seen from the back side. FIG. 3 is a perspective view of the assembly shown in FIG. 2 when viewed obliquely from below. FIG. 3 is a plan view when the assembly is viewed from directly below. It is a top view when the said main part is seen from the lower side.

  Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. In the following, when a plurality of embodiments and modified examples are included, it is assumed from the beginning that a new embodiment is constructed by appropriately combining those features. In the following embodiments, the same components are denoted by the same reference numerals in the drawings, and redundant description will be omitted. In addition, a plurality of drawings include schematic diagrams, and dimensional ratios such as length, width, and height of each member do not always match between different drawings. Further, in the drawings and the following description, the X direction indicates the front-back direction of the lighting device 1, the Y direction indicates the width direction of the lighting device 1, and the Z direction indicates the height direction of the lighting device. Further, the light emitting side of the lighting device 1 is defined as a front side in the X direction, and a side opposite to the light emitting side in the X direction is defined as a rear side in the X direction. The X, Y, and Z directions are orthogonal to each other. In addition, among the components described below, components not described in the independent claim indicating the highest concept are optional components and are not essential components.

  FIG. 1 is a perspective view of a main part 2 of a lighting device 1 according to an embodiment of the present disclosure, and FIG. 2 is a perspective view showing an assembly 80 in which a reflector 30, a projection lens 50, and the like are removed from the main part 2. is there. The lighting device 1 is mounted on, for example, an automobile (not shown) as an example of a moving body, and is used as a headlight of the automobile. As shown in FIG. 1, the illumination device 1 includes a base 10, a reflector (reflection member) 30, and a projection lens 50. Further, as shown in FIG. 2, the lighting device 1 includes a light source module 60.

  As shown in FIG. 2, the base 10 has a fin 11 as an example of a heat radiating portion on one side in the Z direction (hereinafter, referred to as an upper side), and has an inclined surface 12 on the other side in the Z direction (hereinafter, referred to as a lower side). Have. The inclined surface 12 is inclined so as to move toward the fin 11 in the Z direction toward the rear side. The base 10 is preferably formed of a material having a high thermal conductivity such as a metal material. For example, the base 10 is formed by integrally molding the fins 11 and other parts with aluminum die casting or the like.

  The light source module 60 includes a substrate 61 and one or more light emitting elements 62 mounted on the substrate 61. The board 61 is, for example, a printed board. The substrate 61 may have any hardness, and may be formed of any one of a rigid substrate, a flexible substrate, and a rigid flexible substrate. The substrate 61 may have any composition, such as a paper phenol substrate, a paper epoxy substrate, a glass composite substrate, a glass epoxy substrate, a Teflon (registered trademark) substrate, an alumina (ceramics) substrate, or a composite substrate. It consists of.

  The upper surface of the substrate 61 extends along the inclined surface 12 of the base 10 and contacts the inclined surface 12 in this embodiment. The substrate 61 is fixed to the inclined surface 12. The structure for fixing the substrate 61 to the inclined surface 12 will be described later in detail. The substrate 61 is inclined so as to move toward the fin 11 in the Z direction toward the rear side similarly to the inclined surface 12. The light emitting element 62 is mounted on the lower surface of the substrate 61. The light emitting element 62 is preferably configured by an LED (light emitting diode), but may be configured by a semiconductor laser element, an organic EL (Electro Luminescence) element, or an inorganic EL element.

  Referring to FIG. 1 again, reflector 30 is attached to the lower side of base 10 so as to cover light emitting element 62. The reflector 30 is formed of, for example, a white resin material. As a resin material constituting the reflector 30, polybutylene terephthalate or the like can be preferably used. The reflector 30 may be formed of a metal material such as aluminum, or may be a resin molded product in which a metal film such as aluminum is formed on the inner surface. The reflector 30 is attached to the base 10 using, for example, a pin 14 (see FIG. 2) that protrudes from the inclined surface 12 in the normal direction of the base 10.

  The projection lens 50 includes a lens body 51 and a flange portion 52 that extends radially outward from the periphery of the lens body 51. The projection lens 50 is preferably made of, for example, a transparent resin material such as acrylic, polycarbonate, silicone, or the like, or a glass material. The flange portion 52 is fixed to the front side of the base 10 using a screw 70 or the like. As a result, the projection lens 50 is attached to the front side of the base 10.

  FIG. 3 is a perspective view when the main part 2 of the lighting device 1 is viewed from an angle different from the perspective view shown in FIG. As shown in FIG. 3, the lighting device 1 has a shade 75 below the base 10 and in front of the reflector 30. The shade 75 is fixed to the front side and the lower side of the base 10 using, for example, a pin 15 (see FIG. 2) projecting downward in the Z direction from the lower surface on the front side of the base 10. The shade 75 is arranged on the focal plane of the projection lens 50. The shade 75 serves to prevent light emitted from the lighting device 1 from being emitted above the cutoff line so that a driver or a pedestrian in an oncoming vehicle is not dazzled. The surface of the shade 75 is preferably black, but may be silver or the like that easily reflects light. The surface of the shade 75 may be formed with a metal layer by vapor deposition, plating, sputtering, or the like, or may be mirror-finished by polishing or the like, in order to increase the light reflectance. Further, a white coating film containing a white pigment may be provided on the surface of the shade 75 to increase the reflectance.

  FIG. 4 is a schematic diagram showing a part of a schematic cross-sectional view taken along the line AA of FIG. 1, and is a schematic diagram showing a positional relationship among the light emitting element 62, the upper surface 31, the shade 75, and the projection lens 50 of the reflector 30. . Referring to FIG. 4, upper surface 31 of reflector 30 may be formed with a metal layer by vapor deposition, plating, sputtering, or the like, or may be mirror-finished by polishing or the like, in order to increase the light reflectance. Further, the upper surface 31 of the reflector 30 may be formed of a white coating film containing a white pigment having high reflectance.

  The light emitted from the light emitting element 62 is reflected on the upper surface 31 of the reflector 30 to the front side, and among the light reflected on the front side, the light reaching the upper surface of the shade 75 is reflected on the upper surface to the projection lens 50 side. Since the light enters the projection lens 50 via the shade 75, the light from the light emitting element 62 mainly passes above the projection lens 50, and as a result, the light incident on the projection lens 50 is From below the cutoff line on the front side.

  FIG. 5 is a perspective view when the lighting device 1 is viewed from the rear side. As shown in FIG. 5, in the present embodiment, a part of the end 33 located on the rear side of the reflector 30 faces the base 10 at an interval in the height direction. Further, a separation portion 56 that allows air to flow between the element arrangement region 55 (see FIG. 4) in which the light emitting element 62 is covered by the reflector 30 and the base 10 and the external region is provided on the rear side. . The separation section 56 defines a ventilation path 57 for guiding air from the element arrangement area 55 to the outside. As shown in FIG. 4, the upper end 34 on the rear side of the upper surface 31 of the reflector 30 is located above the light emitting element 62. As a result, the separation portion 56 is located closer to the fin 11 in the height direction than the light emitting element 62.

  As shown in FIGS. 1 and 5, the fin 11 has a front portion 11 a located on the front side of the separation portion 56 and a rear portion 11 b located on the rear side of the separation portion 56. In other words, the fins 11 exist so as to straddle the separated portion 56 in the X direction. Further, the fin 11 has a low back portion 11c, which is lower in height than the rear portion 11b located on the rear side of the separation portion 56, on the front portion 11a located on the front side of the separation portion 56.

  Next, a structure for fixing the substrate 61 to the base 10 will be described. FIG. 6 is a perspective view when the assembly 80 shown in FIG. 2 is viewed obliquely from below, and FIG. 7 is a plan view when the assembly 80 is viewed from directly below. As shown in FIGS. 6 and 7, the substrate 61 is not directly screwed to the inclined surface 12 of the base 10, but is indirectly screwed to the base 10 via the substrate supporting piece 90. More specifically, the substrate supporting piece 90 extends from the pressing portion 91, the connecting portion 93 extending upward in the Z direction from the end outside the Y direction of the pressing portion 91, and extends outward in the Y direction from the upper end of the connecting portion 93 in the Z direction. It includes a fixing portion 92. Each of the pressing portion 91, the fixing portion 92, and the connecting portion 93 is formed of a flat plate portion, and the pressing portion 91 and the fixing portion 92 are in a state of being substantially parallel.

  The fixing portion 92 is provided with a screw hole 69 (see FIG. 8). A screw 59 as an example of a fixed body is screwed into a screw hole 69 and a screw hole (not shown) provided in the inclined surface 12, and the fixing portion 92 is tightened to the inclined surface 12. The substrate 61 is pressed to the inclined surface 12 and the substrate 61 is fixed to the inclined surface 12. As shown in FIGS. 6 and 7, the lighting device 1 has two substrate support pieces 90, and the two substrate support pieces 90 are arranged on both sides of the substrate 61 in the Y direction. As a result, the position of the substrate 61 in the Y direction can be accurately positioned.

  The lighting device 1 includes a relative movement restricting unit 76 that restricts a range of the relative movement of the substrate supporting piece 90 with respect to the base 10. The relative movement restricting portion 76 includes a protruding portion 77 protruding from the base 10 toward the substrate supporting piece 90, and a recess 78 accommodating the protruding portion 77 on the substrate supporting piece 90. Further, the base 10 has an inclined surface 12 forming a fixed surface to which the substrate 61 is fixed, and a side surface 19 extending downward from the inclined surface 12 in the Z direction (opposite to the fin 11 side in the Z direction). As shown in FIG. 6, the projecting portion 77 has a portion connected to the inclined surface 12 and a portion connected to the side surface 19, and is configured integrally with the inclined surface 12 and the side surface 19.

  FIG. 8 is a plan view when the main part 2 is viewed from below. As shown in FIGS. 7 and 8, the screw 59 as the fixed body is disposed at a position that does not overlap with the reflector 30 when viewed from the Z direction. As shown in FIG. 8, the substrate 61 has an exposed portion 61a that does not overlap with the reflector 30 when viewed from the Z direction.

  As described above, the lighting device 1 includes the base 10 having the fins (radiator) 11 and the light source module 60 fixed to the base 10 and including the substrate 61 and one or more light emitting elements 62 mounted on the substrate 61. In addition, the lighting device 1 includes a reflector 30 that reflects at least a part of the light emitted from the light source module 60 to the front side in the X direction (front-back direction), which is the light irradiation side, and the light from the reflector 30 to the light irradiation side. A projection lens 50 for projecting is provided. The fins 11 are arranged on the base 10 on the side opposite to the light emitting element 62 side in the Z direction (height direction). Further, the base 10 has an inclined surface 12 that moves toward the fin 11 in the Z direction toward the rear side, and the substrate 61 extends along the inclined surface 12. Further, at least a part of the end portion 33 located on the rear side of the reflector 30 faces the base 10 with an interval in the Z direction. As a result, a separation portion 56 that allows air to flow between the element arrangement region 55 in which the light emitting element 62 is covered by the reflector 30 and the base 10 and the external region is provided on the rear side.

  Therefore, the heat generated in the light emitting element 62 can be released to the outer region via the separation portion 56. Further, the inclined surface 12 to which the substrate 61 is fixed moves upward as it goes rearward, and the separation portion 56 is arranged on the rear side. As a result, high-temperature air that easily rises upward due to the chimney effect can be guided to the separation portion 56 side by the inclined surface 12 and the lower surface of the substrate 61, and can be efficiently discharged from the separation portion 56. Therefore, even if the lighting device 1 is downsized and the element arrangement region 55 is narrowed, the heat generated in the light emitting element 62 can be efficiently radiated to the outside, and the heat deterioration of the lighting device 1, particularly, the reflector 30 is suppressed. it can. Furthermore, since excessive thermal expansion of the reflector 30 that requires high precision with miniaturization can be suppressed, displacement of an actual irradiation range from a desired irradiation range caused by expansion of the reflector 30 is also suppressed. it can.

  Further, the separation portion 56 may be located closer to the fin 11 in the Z direction than the light emitting element 62.

  According to this configuration, the high-temperature air that easily rises upward due to the chimney effect can be more smoothly guided to the separation portion 56 side on the inclined surface 12 and the lower surface of the substrate 61. Therefore, the heat generated in the light emitting element 62 can be more efficiently radiated to the outside. Furthermore, since the heat generated in the light emitting element 62 is easily conducted to the rear, expansion of the shape on the front side of the reflector 30 that requires higher accuracy can be effectively suppressed. It is preferable that this configuration is adopted, but it is not always necessary to adopt this configuration, and the separated portion may be located on the side opposite to the heat radiation side in the height direction from the light emitting element.

  Further, the fin 11 has a front portion 11a located on the front side of the separation portion 56 and a rear portion 11b located on the rear side of the separation portion 56, and the fin 11 straddles the separation portion 56 in the X direction. May be present.

  According to the above configuration, since the base 10 having the fins 11 has a long length in the X direction, the high-temperature air passing through the separation portion 56 can be easily brought into contact with the base 10. Therefore, not only the heat transferred to the separation portion 56 side due to the chimney effect can be directly radiated to the outside, but also can be efficiently conducted to the fin 11 side of the base 10, and the heat can be efficiently transferred to the outside via the fin 11. It can also radiate heat. Therefore, the heat radiation effect can be further improved. Although this configuration is preferably adopted, it is not always necessary to adopt it, and the heat radiating portion does not need to be present so as to straddle the separated portion in the front-rear direction.

  Further, the fin 11 may have a low-back portion 11c, which is lower in height than the rear portion 11b located on the rear side of the separation portion 56, in the front portion 11a located on the front side of the separation portion 56.

  According to the above configuration, the surface area of the fins 11 located on the front portion 11a is smaller than the surface area of the fins 11 located on the rear portion 11b, and the amount of heat released from the rear portion 11b is reduced from the front portion 11a. Than the amount of heat to be applied. Then, the temperature on the rear side in the upper region of the lighting device is likely to be higher than the temperature on the front side in the upper region of the lighting device, and airflow from the rear side to the front side in the upper region of the lighting device is likely to occur. Therefore, this air flow easily takes heat from the rear part 11b, and as a result, the heat radiation effect of the rear part 11b tends to be enhanced. Therefore, the heat dissipation effect on the rear side, which tends to increase due to the chimney effect, can be improved by this airflow, and more effective heat dissipation can be realized.

  Although this configuration is preferably adopted, it is not always necessary to adopt it. Specifically, the heat radiating portion does not have to have a low back portion which is lower in height than a rear portion located behind the separated portion in a front portion located in front of the separated portion, and a heat radiating portion in the front portion may be provided. May be the same as the height of the heat radiating portion of the rear portion, or may be higher than the height of the heat radiating portion of the rear portion.

  Further, a black shade 75 may be arranged on the focal plane of the projection lens 50.

  According to this configuration, light reaching the portion other than the upper surface of the shade 75 is easily absorbed by the shade 75. Therefore, it is possible to reduce light that is irregularly reflected at a portion other than the upper surface of the shade 75 and is irradiated above the cutoff line, and it is possible to suppress emission of light that makes pedestrians and people in oncoming vehicles feel dazzling.

  Further, the lighting device 1 may include a substrate support piece 90 having a pressing portion 91 for pressing the element mounting surface (lower surface) of the substrate 61 and a fixing portion 92 fixed to the base 10 with the screw 59. The substrate 61 may be fixed to the base 10 via the substrate supporting piece 90. Further, the screw 59 may be arranged at a position that does not overlap the reflector 30 when viewed from the Z direction. Further, the substrate 61 may also have an exposed portion 61a that does not overlap with the reflector 30 when viewed from the Z direction.

  The displacement of the fixed position on the substrate from the desired position causes a displacement of the actual irradiation area from the desired irradiation area. Here, the magnitude of the displacement of the irradiation light caused by the displacement of the substrate increases as the size of the illumination device is reduced. Therefore, it is necessary to position the substrate with high precision as the size of the lighting device is reduced.

  According to the above configuration, the substrate 61 is fixed to the base 10 via the substrate supporting piece 90, and is not directly fixed to the base 10. Therefore, compared to the case where the substrate is directly tightened to the base using screws, the substrate 61 is less likely to be affected by the torque of the screw tightening, and the substrate 61 can be easily fixed to the base 10 with high accuracy.

  Further, when viewed from the Z direction, the screw 59 does not overlap with the reflector 30, and the substrate 61 also has an exposed portion 61 a that does not overlap with the reflector 30. Therefore, it is easy to move the substrate 61 to an accurate position by hand or a jig in a state where the screw 59 is loosened without removing the reflector 30, and without applying a torque to the substrate 61 when the substrate 61 is moved to the accurate position. Easy to screw. Therefore, it is not necessary to attach / detach the reflector 30 to fix the substrate 61 at an accurate position, and it is possible to improve workability when fixing the substrate 61 to an accurate position.

  Although this configuration is preferably adopted, it is not always necessary to adopt it. Specifically, the substrate may be directly screwed to the base. In addition, when viewed from the height direction, the screw may be present at a position overlapping the reflector, and the substrate may not have an exposed portion that does not overlap the reflector 30.

  In addition, the lighting device 1 may include a relative movement restricting unit 76 that restricts a range of the relative movement of the substrate supporting piece 90 with respect to the base 10.

  According to the above configuration, the movement of the substrate supporting piece 90 while the substrate supporting piece 90 is fastened to the base 10 with the screw 59 can be restricted. Therefore, the torque applied to the substrate 61 by the substrate supporting piece 90 when the screw 59 is tightened can be further reduced, and the substrate 61 can be easily positioned with higher precision. It is preferable that this configuration is adopted, but it is not necessary to adopt this configuration, and the lighting device may not have the relative movement restricting unit that limits the range of the relative movement of the substrate supporting piece with respect to the base.

  Further, the relative movement restricting portion 76 may include a projecting portion 77 projecting toward the substrate supporting piece 90 side of the base 10 and a concave portion 78 accommodating the projecting portion 77 in the substrate supporting piece 90.

  According to the above configuration, the relative movement restricting section 76 can be configured simply and inexpensively. Although this configuration is preferably adopted, it is not always necessary to adopt it. For example, the substrate supporting piece may have a protruding portion protruding toward the base, and the base may have a recess for accommodating the protruding portion of the substrate supporting piece.

  Further, the base 10 may have an inclined surface (fixed surface) 12 to which the substrate 61 is fixed, and a side surface 19 extending from the inclined surface 12 to the side opposite to the fin 11 side in the Z direction. Further, the projecting portion 77 may have a portion connected to the inclined surface 12 and a portion connected to the side surface 19, and may be configured integrally with the inclined surface 12 and the side surface 19.

  According to the above configuration, the protrusion 77 can be formed easily and inexpensively, and the rigidity of the protrusion 77 can be increased. In addition, although this structure is preferably adopted, it is not always necessary to adopt it, and the protruding portion may be connected to only one of the inclined surface and the side surface.

  It should be noted that the present disclosure is not limited to the above-described embodiment and its modifications, and various modifications and changes can be made in the matters described in the claims of the present application and their equivalents.

  For example, in the above-described embodiment, a case has been described in which the separation portion 56 is formed between the rear and upper end portion of the reflector 30 and the base 10. However, the separation part may be formed between the rear and upper end part of the reflector and the substrate. Alternatively, the separation portion may include a portion formed between the rear and upper end of the reflector and the base, and a portion formed between the rear and upper end of the reflector and the substrate. Good.

  Further, the heat radiating portion was constituted by the fins 11. However, the base may be made of a material in which a first portion made of a first material and a second portion made of a material having better heat dissipation than the first material are joined. May be used as a heat radiator.

  In addition, the case has been described in which the lighting device 1 is included in a headlight of an automobile as an example of a moving object. However, the headlight including the lighting device 1 may be mounted on any four-wheeled vehicle other than a car, for example, a truck, a fire truck, a bus, or the like, or any moving object other than a four-wheeled vehicle, for example, , A motorcycle (auto motorcycle), an auto three-wheel, a hovercraft, or the like. Alternatively, the lighting device of the present disclosure may be mounted on any machine or device other than the moving object, for example, may be mounted on a lighting device used in a home or a factory.

  The operation and effect of the technology of the present disclosure become more remarkable and distinctive as the illumination device becomes smaller. Therefore, the portion excluding the power supply line from the lighting device of the present disclosure may have any size, but a size that can be arranged in a sphere having a diameter of 10 cm, and a size that can be arranged in a sphere having a diameter of 5 cm. Alternatively, it is preferable that the size be such that it can be arranged in a sphere having a diameter of 3 cm. Alternatively, the portion excluding the power supply line from the lighting device of the present disclosure is more preferably a size that can be arranged in a sphere having a diameter of 2.5 cm or a size that can be arranged in a sphere having a diameter of 2 cm. . Furthermore, when the illumination device is miniaturized, if the illumination device has the substrate support piece 90, even if the illumination device does not have the separation portion 56, the actual irradiation area from the desired irradiation area can be reduced. It is possible to have a special and remarkable effect that the displacement can be reduced.

  DESCRIPTION OF SYMBOLS 1 Illumination device, 10 base, 11 fins, 11a front part, 11b rear part, 11c low back part, 12 inclined surface (fixed surface), 19 base side surface, 30 reflector, 55 element arrangement area, 33 reflector on rear side Located end portion, 50 projection lens, 56 separation portion, 59 screw (fixing material), 60 light source module, 61 substrate, 61a exposed portion, 62 light emitting element, 75 shade, 76 relative movement restricting portion, 77 projecting portion of base, 78 recess of substrate support piece, 90 substrate support piece, 91, pressing part of substrate support piece, 92 fixing part of substrate support piece, X direction front and rear direction, Z direction height direction.

Claims (11)

A base having a heat radiating portion,
A light source module fixed to the base, including a substrate, and one or more light emitting elements mounted on the substrate;
A reflector that reflects at least a part of light emitted from the light source module to a front side in a front-rear direction that is a light irradiation side,
A projection lens for projecting light from the reflector to the light irradiation side,
The heat radiating unit is arranged on a side opposite to the light emitting element side of the base with respect to a height direction,
The base has an inclined surface that moves toward the heat radiating portion in the height direction as it goes rearward, and the substrate extends along the inclined surface,
At least a part of the end located on the rear side of the reflector is opposed to at least one of the substrate and the base at an interval in the height direction. A lighting device, wherein a separation portion that allows air to flow between an element disposition area where the light emitting element is covered and an external area is provided on the rear side.   The lighting device according to claim 1, wherein the separation unit is located closer to the heat radiation unit in the height direction than the light emitting element.   The heat radiating portion has a front portion located on the front side of the separation portion and a rear portion located on the rear side of the separation portion, and the heat radiating portion straddles the separation portion in the front-rear direction. The lighting device according to claim 1, wherein the lighting device is provided so as to be curved.   4. The heat radiating unit according to claim 1, wherein the heat radiating unit includes a low-back portion, which is lower in height than a rear portion located on the rear side of the separated portion, on a front portion located on the front side of the separated portion. 5. The lighting device according to one of the above.   The illumination device according to claim 1, wherein a black shade is arranged on a focal plane of the projection lens. A substrate supporting piece having a pressing portion for pressing an element mounting surface of the substrate and a fixing portion fixed to the base by a fixing body, wherein the substrate is fixed to the base via the substrate supporting piece. ,
The lighting device according to claim 1, wherein the fixed body is arranged at a position that does not overlap with the reflector when viewed from the height direction.   The lighting device according to claim 6, further comprising a relative movement limiting unit that limits a range of the relative movement of the substrate supporting piece with respect to the base.   The lighting device according to claim 7, wherein the relative movement restricting portion includes a projecting portion projecting toward the substrate supporting piece on the base, and a recess accommodating the projecting portion in the substrate supporting piece. The base has a fixed surface to which the substrate is fixed, and a side surface extending from the fixed surface to a side opposite to the heat radiation side in the height direction,
The lighting device according to claim 8, wherein the protrusion has a portion connected to the fixing surface and a portion connected to the side surface, and is configured integrally with the fixing surface and the side surface.   The lighting device according to any one of claims 1 to 9, wherein the substrate has an exposed portion that does not overlap the reflector when viewed from the height direction.   A moving object comprising the lighting device according to claim 1.

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