JP2016031777A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which a sufficient heat dissipation effect cannot be obtained by a conventional vehicular lighting fixture.SOLUTION: A vehicular lighting fixture according to the present invention comprises a light source 2, a reflector 3, a projection lens 4, a heat sink member 5, a fan 6, and a guide member 7. The guide member 7 guides air forcibly sent from the fan 6 so that it passes between a plurality of fin parts 53 of the heat sink member 5. In addition, the guide member 7 prevents the air forcibly sent from the fan 6 from leaking between the plurality of fin parts 53 of the heat sink member 5. Consequently, a sufficient heat dissipation effect can be obtained by the present invention.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicular lamp including a fan.

  Conventionally, this type of vehicle lamp is known (for example, Patent Document 1, Patent Document 2, and Patent Document 3). The vehicular lamp of Patent Document 1 includes a heat sink that dissipates heat generated from a light source, a fan, an outer lens, and a diverter. The vehicular lamp of Patent Document 1 divides the air blown from the fan into the outer lens direction and the heat sink direction by the diversion unit, and dissipates the heat generated from the light source via the heat sink.

  The vehicular lamp of Patent Document 2 includes a lamp body and a through hole cover, a support member that supports the optical unit, and a fan. In the vehicular lamp of Patent Document 2, the air blown from the fan is caused to flow in the ventilation path of the support member from the lamp body toward the through hole cover, and the heat generated by the optical unit via the support member is generated. It is intended to diffuse.

  The vehicular lamp of Patent Document 3 includes a metal support member on which a light emitting element is mounted, a movable shade, and a cooling fan. The vehicular lamp of Patent Document 3 rotates a cooling fan to generate an upward wind, and causes the upward wind to flow through the heat dissipation fins of the metal support member and the drive source of the movable shade, via the metal support member. The heat generated by the light emitting element is discharged and the drive source is cooled.

JP 2009-295513 A JP 2010-27583 A JP 2014-22307 A

  However, in the vehicular lamp of Patent Document 1, the air blown from the fan is diverted to the outer lens side and the heat sink side by the diverter. For this reason, sufficient air does not flow to the heat sink side, and a sufficient heat dissipation effect by the heat sink may not be obtained.

  In the vehicular lamp of Patent Document 2, the air blown from the fan simply flows in the ventilation path of the support member from the lamp body toward the through hole cover. For this reason, air may leak from the ventilation path of the support member, and a sufficient heat dissipation effect by the support member may not be obtained.

  Furthermore, in the vehicular lamp of Patent Document 3, upward wind simply flows to the heat radiation fins of the metal support member and the drive source of the movable shade. For this reason, wind may leak from the heat radiation fin of the metal support member, and a sufficient heat dissipation effect by the metal support member may not be obtained.

  The problem to be solved by the present invention is that a conventional vehicle lamp may not provide a sufficient heat dissipation effect.

  The present invention (the invention according to claim 1) includes a light source, a heat sink member composed of a mounting portion to which the light source is mounted, and a plurality of fin portions, and light from the light source as a predetermined light distribution pattern. An optical member that irradiates the outside, a fan that forcibly sends air between a plurality of fin portions, and a guide that guides air that is forcibly sent from the fan to pass between the plurality of fin portions. And a member.

  This invention (invention according to claim 2) is characterized in that the guide member closes an opening end parallel to or substantially parallel to a direction in which air passes among the opening ends of the plurality of fin portions.

  In this invention (the invention according to claim 3), the guide member closes at least the opening end corresponding to the light source among the opening ends parallel to or substantially parallel to the air passage direction of the plurality of fin portions. It is characterized by.

  In the present invention (the invention according to claim 4), the guide member is also arranged between the heat sink member and the optical member so that the air passing between the plurality of fin portions is sent to the optical member. It is characterized by that.

  This invention (invention according to claim 5) is characterized in that the guide member forms an integral structure with the holder member that holds the optical member and is attached to the heat sink member.

  This invention (the invention according to claim 6) is characterized in that a part of the guide member has a cylindrical shape.

  The vehicular lamp of the present invention is guided by the guide member so that the air forcedly sent from the fan passes between the plurality of fin portions. For this reason, most of the air forced from the fan passes between the plurality of fins, and the air forced from the fan leaks between the fins. Can be prevented. As a result, a sufficient heat dissipation effect by the heat sink member can be obtained.

1 is a longitudinal sectional view (vertical sectional view, sectional view taken along line II in FIG. 2) of a lamp unit showing Embodiment 1 of a vehicular lamp according to the present invention. FIG. 2 is a perspective view showing the lamp unit. FIG. 3 is a perspective view showing the lens holder. FIG. 4 is a side view showing the lamp unit (a view taken along arrow IV in FIG. 2). FIG. 5 is a bottom view showing the lamp unit (viewed in the direction of arrow V in FIG. 2). FIG. 6 is a longitudinal sectional view (vertical sectional view, sectional view corresponding to FIG. 1) of a lamp unit showing Embodiment 2 of the vehicular lamp according to the present invention.

  Hereinafter, two examples of an embodiment (example) of a vehicular lamp according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In FIG. 1 and FIG. 6, the broken line arrows indicate the flow of air. 1 and 6, the light source, the projection lens, and the fan are not hatched. In this specification, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicle lamp according to the present invention is mounted on a vehicle.

(Description of Configuration of Embodiment 1)
1 to 5 show Embodiment 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp in the first embodiment will be described. In this example, for example, a headlamp of an automotive headlamp will be described.

(Description of vehicle lamp 1)
In the figure, reference numeral 1 denotes a vehicular lamp in the first embodiment. The vehicular lamp 1 is mounted on each of the left and right sides of the front portion of a vehicle (not shown). The vehicle lamp 1 includes a lamp housing (not shown), a lamp lens (not shown), a light source 2, a reflector 3, a projection lens 4, a heat sink member 5, a fan 6, and a guide member 7. A holder member 8 and a shade 9. The light source 2, the reflector 3, the projection lens 4, the fan 6, the guide member 7, the holder member 8, and the shade 9 are respectively attached to the heat sink member 5 that also serves as an attachment member.

  The lamp housing and the lamp lens (for example, a transparent outer lens) define a lamp chamber (not shown). The light source 2, the reflector 3, the projection lens 4, the heat sink member 5, the fan 6, the guide member 7, the holder member 8 and the shade 9 constitute a projector type lamp unit. The lamp units 2, 3, 4, 5, 6, 7, 8, and 9 are lamp units that irradiate a front of the vehicle with a low beam light distribution pattern (not shown).

  The lamp units 2, 3, 4, 5, 6, 7, 8, and 9 are disposed in the lamp chamber, and have an optical axis adjustment mechanism for vertical direction (not shown) and an optical axis adjustment for horizontal direction It is attached to the lamp housing via a mechanism (not shown). Although not shown in the lamp chamber, other lamp units such as a high beam irradiation lamp unit, an ADB irradiation lamp unit, a fog lamp, a cornering lamp, a clearance lamp, a turn signal lamp, an overhead sign lamp, a daytime running lamp, etc. May be arranged.

(Description of light source 2)
In this example, the light source 2 is a semiconductor-type light source and uses a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL). The light source 2 includes a light emitting unit having a light emitting surface that emits light, and a substrate unit. For example, the light source 2 includes a package (LED package) in which a light emitting chip (LED chip) as the light emitting unit is sealed with a sealing resin member. The package is mounted on the substrate. A current from a power source (battery) is supplied to the light emitting chip via a connector (not shown) attached to the substrate.

(Description of reflector 3)
The reflector 3 is made of a material having high heat resistance such as a resin member or metal die-casting (aluminum die-casting) and a light-impermeable material. The reflector 3 has a hollow shape in which a front part and a lower part are opened, and a rear part, an upper part, and both left and right parts are closed. On the concave inner surface of the closed portion of the reflector 3, there is provided a reflecting surface 30 made of a free-form surface based on a spheroid surface (ellipse).

  The reflection surface 30 is composed of a free-form surface. The reflecting surface 30 includes a first focal point F1 and a second focal point (or a second focal line) F2, and an optical axis (not shown) connecting the first focal point F1 and the second focal point F2. The first focus F1 is positioned lower than the second focus F2. Therefore, the optical axis is inclined upward from the light source 2 to the projection lens 4. The reflection surface 30 reflects light from the light source 2 to the projection lens 4 side as reflected light.

(Description of the projection lens 4)
The projection lens 4 is made of a resin lens such as a PC material, a PMMA material, or a PCO material. That is, since the light emitted from the light source 2 does not have high heat, a resin lens can be used as the projection lens 4.

  The projection lens 4, together with the reflector 3 and the shade 9, irradiates (projects) light from the light source 2 to the outside, that is, the front of the vehicle, as a predetermined light distribution pattern, in this example, the low beam light distribution pattern. It constitutes. The projection lens 4 includes a rear plane incident surface 40, a front aspherical exit surface 41, and a flange portion 42.

  A rear focal point (a meridional image plane that is a focal plane on the object space side) F3 of the projection lens 4 coincides with or substantially coincides with the second focal point F2 of the reflecting surface 30. The optical axis (lens axis) Z of the projection lens 4 is horizontal or almost horizontal. Therefore, the optical axis Z of the projection lens 4 intersects the optical axis of the reflecting surface 30 at the rear focal point F3, the second focal point, or the vicinity thereof.

(Description of heat sink member 5)
The heat sink member 5 is composed of a member having good heat transfer (heat conduction) (a member having low thermal resistance). The heat sink member 5 is integrally composed of a horizontal mounting plate portion 50, a vertical mounting plate portion 51, a vertical plate portion 52, and a plurality of fin portions 53.

  One end (rear end) of the horizontal mounting plate portion 50 and one end (lower end) of the vertical plate portion 52 are integrally connected. A plurality of fins 53 are integrally connected to one surface (lower surface) of the horizontal mounting plate portion 50 and one surface (rear surface) of the vertical plate portion 52. As a result, the plurality of fin portions 53 have a front end positioned below the horizontal mounting plate portion 50, an upper end, a lower end, and a rear end positioned rearward of the vertical plate portion 52, respectively. ing.

  The plurality of fin portions 53 are arranged at equal intervals or substantially equal intervals in the left-right direction, and extend in the front-rear direction (the optical axis Z direction). The plurality of fin portions 53 have an L shape in a side view including a horizontal portion corresponding to the horizontal mounting plate portion 50 and a vertical portion corresponding to the vertical plate portion 52.

  The light source 2 and the reflector 3 are attached to the other surface (upper surface) of the horizontal mounting plate portion 50. The fan 6 is mounted on one surface of the horizontal mounting plate portion 50. The projection lens 4 is mounted on the one surface (front surface) of the vertical mounting plate portion 51 together with the guide member 7 via the holder member 8. The shade 9 is attached to at least one of the horizontal attachment plate portion 50 and the vertical attachment plate portion 51.

(Description of fan 6)
The fan 6 is an axial flow type fan that sucks air (see a broken line arrow in FIG. 1) from one axial direction (downward) and discharges it to the other axial direction (upward). The fan 6 covers a motor (not shown), an impeller 60 rotated by the motor, a blade 61 provided on the impeller 60, the motor, the impeller 60, and the blade 61. And a casing 62.

  The fan 6 has an air discharge side (blowout side) opposed to the lower ends of the openings of the plurality of fin portions 53, and air is directed from the lower side to the upper side to the lower ends of the openings of the plurality of fin portions 53. To force it. The fan 6 is located on the rear side (opposite to the projection lens 4) of the light source 2.

(Description of the guide member 7)
The guide member 7 guides the air that is forcibly sent from the fan 6 so as to pass between the plurality of fin portions 53. The guide member 7 closes the opening end parallel to or substantially parallel to the air passage direction, in this example, the opening lower end, among the opening ends of the plurality of fin portions 53. The guide member 7 of this example closes at least the lower end of the opening corresponding to the light source 2 among the lower ends of the opening parallel to or substantially parallel to the air passage direction of the plurality of fin portions 53. That is, the guide member 7 is positioned at least directly below or almost directly below the light source 2.

  A dimension T between one end (rear end) of the guide member 7 and the casing 62 of the fan 6 is smaller than a dimension between the plurality of fin portions 53. The guide member 7 is also provided between the heat sink member 5 and the projection lens 4 so that air passing between the plurality of fin portions 53 is sent to the projection lens 4 side as the optical member. Has been placed. That is, the guide member 7 of this example has an integral structure with the holder member 8 that holds the projection lens 4 and is attached to the heat sink member 5.

(Description of holder member 8)
The holder member 8 has a cylindrical shape. On the outer peripheral surface of the one end opening (rear end opening) of the holder member 8, a plurality of three boss portions 80 in this example are integrally provided. A plurality of rims 81, in this example, three leg portions 82 are attached to the boss portion 80 by screws. The rim 81 has an annular shape, and the three leg portions 82 are integrally provided.

  On the inner peripheral surface of the other end opening (front end opening) of the holder member 8, a convex portion 83 is integrally provided. The flange portion 42 of the projection lens 4 is sandwiched between the convex portion 83 and the rim 81. Thereby, the projection lens 4 is attached to and held by the holder member 8.

  Vertical attachment portions 84 are integrally provided on the left and right sides of the outer peripheral surface of the one end opening (rear end opening) of the holder member 8. The vertical attachment portion 84 is attached to the vertical attachment portion 51 of the heat sink member 5. As a result, the projection lens 4 as the optical member is attached to the heat sink member 5 via the holder member 8.

  A lower portion 85 of one end opening (rear end opening) of the holder member 8 extends rearward. The lower portion 85 has an integral structure with the guide member 7. As a result, the guide member 7 is disposed between the lower end of the opening of the heat sink member 5 corresponding to the light source 2 and the projection lens 4. That is, the guide member 7 is positioned at least directly below or almost directly below the light source 2.

  An opening 86 is formed between the upper end of one end opening (rear end opening) of the holder member 8 and the front end of the reflector 3.

(Description of shade 9)
The shade 9 cuts off part of the reflected light from the reflecting surface 30 to form the low beam light distribution pattern. The shade 9 is provided with an edge that forms a cut-off line (not shown) of the low beam light distribution pattern. The edge is located at the second focal point F2, the rear focal point F3, or the vicinity thereof.

(Description of the operation of the first embodiment)
The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  The light source 2 is turned on to emit light. Then, the light emitted from the light source 2 is reflected by the reflecting surface 30 of the reflector 3 toward the projection lens 4. Part of the reflected light is cut off by the shade 9. The remainder of the reflected light that has not been cut off by the shade 9 enters the projection lens 4 from the incident surface 40 of the projection lens 4. The incident light is emitted from the exit surface 41 of the projection lens 4 to the outside, that is, the front of the vehicle, as a low beam light distribution pattern.

  Here, most of the heat generated in the light source 2 is transmitted to the plurality of fin portions 53 via the horizontal mounting plate portion 50 and the vertical plate portion 52 of the heat sink member 5. On the other hand, when the motor of the fan 6 is driven, the impeller 60 and the blade 61 rotate. Thus, air is forcibly sucked from the lower side of the fan 6 and discharged to the upper side, that is, the lower end side of the openings of the plurality of fin portions 53 of the heat sink member 5.

  The air forcedly protruded from the fan 6 and sent from the lower ends of the openings of the plurality of fin portions 53 proceeds from the lower side to the upper side between the plurality of fin portions 53. Part of the air hits the lower surface of the horizontal mounting plate portion 50 of the heat sink member 5 and flows separately into the front and the rear.

  The air separated forward passes horizontally between the plurality of fin portions 53 from the rear side to the front side by the guide member 7 that acts in the same manner as the duct together with the horizontal mounting plate portion 50, and the plurality of fin portions Leakage from between 53 is prevented.

  The air that passes horizontally between the plurality of fin portions 53 from the rear side to the front side and emerges from the front end of the openings of the plurality of fin portions 53 is guided by the lower portion 85 of the holder member 8 that is integral with the guide member 7. Thus, the projection lens 4 advances to the incident surface 40 side.

  The air that has traveled to the incident surface 40 side of the projection lens 4 proceeds from the lower side to the upper side in the space surrounded by the reflector 3, the projection lens 4, the guide member 7, and the holder member 8. From the opening 86 therebetween, the light is discharged out of the space of the projector type lamp units 2, 3, 4, 5, 6, 7, 8, 9 (in the lamp chamber).

  On the other hand, the air separated backward passes horizontally between the plurality of fin portions 53 along the horizontal mounting plate portion 50 from the front side to the rear side. The air merges with the air that travels from the lower side to the upper side between the lower ends of the openings of the plurality of fin portions 53 and between the plurality of fin portions 53. The merged air travels from the lower side to the upper side between the plurality of fin portions 53 along the vertical plate portion 52 and is discharged from the upper end of the openings of the plurality of fin portions 53 into the lamp chamber.

  Thereby, the heat generated in the light source 2 is efficiently discharged to the inside of the lamp chamber by the action of the heat sink member 5, the fan 6 and the guide member 7. Further, the heat accumulated in the space surrounded by the reflector 3, the projection lens 4, the guide member 7 and the holder member 8 is efficiently discharged from the opening 86 into the lamp chamber by the action of the fan 6 and the guide member 7. .

(Description of the effect of Embodiment 1)
The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  The vehicular lamp 1 according to the first embodiment is guided by the guide member 7 so that air forcedly sent from the fan 6 passes between the plurality of fin portions 53 of the heat sink member 5. For this reason, most of the air that is forcibly sent from the fan 6 passes between the plurality of fin portions 53, and the air that is forcibly sent from the fan 6 is a plurality of fin portions 53. It is possible to prevent leakage from between the two. As a result, a sufficient heat dissipation effect by the heat sink member 5 is obtained.

  In the vehicular lamp 1 according to the first embodiment, the guide member 7 closes the opening end parallel to or substantially parallel to the air passage direction, in this example, the opening lower end among the opening ends of the plurality of fin portions 53. Is. For this reason, it is possible to reliably prevent the air that is forcibly sent from the fan 6 from leaking outside between the plurality of fin portions 53 via the lower end of the opening. As a result, a further sufficient heat dissipation effect by the heat sink member 5 can be obtained.

  In the vehicular lamp 1 according to the first embodiment, the guide member 7 closes at least the lower end of the opening corresponding to the light source 2 among the lower ends of the opening parallel to or substantially parallel to the direction in which the air of the plurality of fin portions 53 passes. . That is, the guide member 7 is positioned at least directly below or almost directly below the light source 2. For this reason, the heat generated in the light source 2 can be reliably discharged to the outside by the plurality of fin portions 53 via the horizontal mounting plate portion 50. As a result, a sufficient heat dissipation effect by the heat sink member 5 is obtained.

  In the vehicular lamp 1 according to the first embodiment, the heat sink member 5 and the projection lens 4 are arranged such that the air passing through the plurality of fin portions 53 of the guide member 7 is sent to the projection lens 4 side as an optical member. It is also arranged between. For this reason, the heat trapped in the space surrounded by the reflector 3, the projection lens 4, the guide member 7 and the holder member 8 is efficiently discharged from the opening 86 to the inside of the lamp chamber by the action of the fan 6 and the guide member 7. can do. As a result, a heat dissipation effect of heat generated in the light source 2 is obtained.

  In the vehicular lamp 1 according to the first embodiment, the guide member 7 and the holder member 8 form an integral structure. For this reason, the number of parts, the number of assembly steps, etc. can be reduced, and the manufacturing cost can be reduced accordingly.

  In the vehicular lamp 1 according to the first embodiment, the dimension T between one end (rear end) of the guide member 7 and the casing 62 of the fan 6 is smaller than the dimension between the plurality of fin portions 53. For this reason, the guide member 7 performs a sufficient guiding action. As a result, a heat dissipation effect of heat generated in the light source 2 is obtained.

(Description of configuration, action, and effect of embodiment 2)
FIG. 6 shows Embodiment 2 of the vehicular lamp according to the present invention. Hereinafter, the vehicular lamp according to the second embodiment will be described.

  As shown in FIG. 1, the vehicular lamp 1 according to the first embodiment is configured such that the fan 6 is directed toward the lower ends of the openings of the plurality of fin portions 53 of the heat sink member 5 and behind the light source 2 (projection). It is positioned on the side opposite to the lens 4 and the wind is forcibly sent from the lower side to the upper side.

  In contrast, in the vehicular lamp 100 according to the second embodiment, the fan 6 is positioned toward the rear end of the plurality of fin portions 53 of the heat sink member 5 to force the wind from the rear side to the front side. To send.

  Since the vehicular lamp 100 according to the second embodiment is configured as described above, it is possible to achieve substantially the same operations and effects as the vehicular lamp 1 of the first embodiment. As indicated by a two-dot chain line in FIG. 6, the opening lower ends of the plurality of fin portions 53 of the heat sink member 5 where the fan 6 of the vehicle lamp 1 of the first embodiment is located, You may provide the guide member 70 which extended the guide member 7 of Embodiment 1 back.

(Description of modification)
Hereinafter, modifications of the vehicular lamp according to the present invention will be described. In the vehicular lamp according to this modification, a part of the guide member 7 of the vehicular lamps 1 and 100 according to the first and second embodiments has a cylindrical shape. That is, the cylindrical holder member 8 of the vehicular lamps 1 and 100 according to the first and second embodiments is a cylindrical part of the guide member 7.

  In the vehicular lamp according to this modification, a part of the guide member 7 (holder member 8) has a cylindrical shape, so that air can be easily guided upward along the cylindrical shape. Thereby, the heat dissipation effect is improved. In addition, in the vehicular lamps 1 and 100 according to the first and second embodiments and the vehicular lamp according to the modification, the projection lens 4 having a circular shape in front view is used. is there. However, if the front view shape of the lens is other than a circular shape, the cylindrical shape of a part of the guide member 7 also changes. For example, if the front-view shape of the lens is a rectangular shape, a part of the guide member 7 has a rectangular cylindrical shape.

(Description of examples other than Embodiments 1 and 2)
In the first and second embodiments, projector type lamp units 2, 3, 4, 5, 6, 7, 8, and 9 will be described. However, in the present invention, a lamp unit other than the projector type lamp unit 2, 3, 4, 5, 6, 7, 8, 9 may be used, for example, a lens direct type lamp unit or a reflector type lamp unit. good.

  In the first and second embodiments, a fixed shade is used as the shade 9. However, in the present invention, a movable shade may be used as the shade 9. In this case, as the light distribution pattern, a low beam light distribution pattern and a high beam light distribution pattern are obtained.

DESCRIPTION OF SYMBOLS 1,100 Vehicle lamp 2 Light source 3 Reflector 30 Reflective surface 4 Projection lens 40 Incident surface 41 Outgoing surface 42 Flange part 5 Heat sink member 50 Horizontal attachment plate part 51 Vertical attachment plate part 52 Vertical plate part 53 Fin part 6 Fan 60 Impeller 61 Blade 62 Casing 7, 70 Guide member 8 Holder member 80 Boss part 81 Rim 82 Leg part 83 Projection part 84 Vertical mounting part 85 Lower part 86 Opening part 9 Shade F1 1st focus F2 2nd focus F3 Rear focus Z Optical axis

Claims (6)

A light source;
A heat sink member composed of an attachment portion to which the light source is attached, and a plurality of fin portions;
An optical member that irradiates the light from the light source to the outside as a predetermined light distribution pattern;
A fan that forcibly sends air between the plurality of fin portions;
A guide member that guides air forcedly sent from the fan so as to pass between the plurality of fin portions;
Comprising
A vehicular lamp characterized by the above. The guide member closes an opening end parallel to or substantially parallel to a direction through which air passes among the opening ends of the plurality of fin portions.
The vehicular lamp according to claim 1. The guide member closes at least the opening end corresponding to the light source among the opening ends parallel to or substantially parallel to a direction in which the air of the plurality of fin portions passes.
The vehicular lamp according to claim 2. The guide member is also disposed between the heat sink member and the optical member so that air passing between the plurality of fin portions is sent to the optical member.
The vehicular lamp according to any one of claims 1 to 3. The guide member has an integrated structure with a holder member that holds the optical member and is attached to the heat sink member.
The vehicular lamp according to any one of claims 1 to 4, wherein the vehicular lamp is provided. A part of the guide member has a cylindrical shape,
The vehicular lamp according to any one of claims 1 to 5, wherein the vehicular lamp is provided.

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