JP2023098150A - Vehicular headlamp - Google Patents

Abstract

To provide a vehicular headlamp capable of suppressing an influence of sunlight.SOLUTION: A vehicular headlamp includes: a light source portion that has a light source and a substrate supporting the light source; a reflector that reflects light from the light source; a lens that has an incident surface on which the light reflected by the reflector is incident, and an emission surface on which the light incident in the incident surface is emitted to an irradiation area in front of a vehicle; a supporting member that has a base supporting a bottom portion of the substrate, and side part supporting portion disposed on the base and supporting a side part of the substrate; and a holder that is formed using resin, is disposed at a position surrounding the substrate and the side part supporting portion of the base, and fixes the substrate to the supporting member. The supporting member has a rib portion shielding sunlight at a part of the base that is surrounded by the holder.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle headlamp.

BACKGROUND ART A vehicle lamp is known that includes a light source unit having a light source and a substrate that supports the light source, a reflector that reflects light from the light source, and a lens that emits the light reflected by the reflector to an irradiation area in front of the vehicle. there is In such a vehicle lamp, a resin holder for fixing the substrate of the light source unit may be arranged around the substrate (see, for example, Patent Document 1).

JP 2018-245151 A

In the vehicle lamp described above, sunlight may be condensed by the lens and radiated onto the holder via the reflector. Irradiation of sunlight raises the temperature of the resin holder, which may cause deformation or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle headlamp capable of suppressing the influence of sunlight.

A vehicle headlamp according to the present invention includes a light source section having a light source and a substrate for supporting the light source, a reflector for reflecting light from the light source, and an incident surface for receiving the light reflected by the reflector. a lens having an emission surface for emitting the light incident on the incidence surface to an irradiation area in front of the vehicle; a base that supports the bottom of the substrate; and a side that is arranged on the base and supports the side of the substrate. a support member having a support member, and a holder formed using resin and arranged at a position surrounding the substrate and the side support member in the base and fixing the substrate to the support member, The support member has a rib portion that blocks sunlight in a portion of the base that is surrounded by the holder.

In the vehicle headlamp described above, the rib portion may be provided to protrude from the base to a position higher than at least one of the side support portion and the holder.

In the vehicle headlamp described above, the rib portion may be arranged between the side support portion and the holder.

In the vehicle headlamp described above, the rib portion may be arranged on at least one side of the light source portion in a left-right direction when the vehicle is mounted on the vehicle.

In the vehicle headlamp described above, the rib portion may be arranged at a position on the rear side of the light source and a position on the front side of the light source when the vehicle is mounted on the vehicle.

In the vehicle headlamp described above, the rib portion arranged at a position on the rear side of the light source is arranged in at least one of the front-rear direction and the left-right direction relative to the rib portion arranged at the position on the front side of the light source. The dimension in the direction of may be large.

In the vehicle headlamp described above, the rib portion may be provided integrally with the side support portion.

In the vehicle headlamp described above, the rib portion may be arranged along the inner circumference of the holder.

In the vehicle headlamp described above, the rib portion may be arranged such that the distance from the inner periphery of the holder is constant.

ADVANTAGE OF THE INVENTION According to this invention, the vehicle headlamp which can suppress the influence of sunlight can be provided.

FIG. 1 is a diagram showing an example of a vehicle headlamp according to this embodiment. FIG. 2 is a perspective view showing a light source section and a support member. FIG. 3 is a diagram showing an example of the light source section and the supporting member viewed from above. 4 is a cross-sectional view taken along the line AA in FIG. 3. FIG. FIG. 5 is a diagram showing an example of a case where sunlight is incident on the vehicle headlamp according to the present embodiment. FIG. 6 is a diagram showing an example of a case where sunlight is incident on the vehicle headlamp according to the present embodiment. FIG. 7 is a diagram showing an example of a case where sunlight is incident on a vehicle headlamp according to a comparative example. FIG. 8 is a diagram showing a configuration of part of a vehicle headlamp according to a modification.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle headlamp according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same. In the following description, front and rear, up and down, and left and right directions are the directions in which the vehicle headlamp is mounted in the vehicle, and the directions when viewed from the driver's seat in the traveling direction of the vehicle. . In this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction.

FIG. 1 is a diagram showing an example of a vehicle headlamp 100 according to this embodiment. As shown in FIG. 1 , the vehicle headlamp 100 includes a light source section 10 , a reflector 20 , a lens 30 , a support member 40 , a holder 50 and a shade 60 . The light source unit 10, the reflector 20, the lens 30, the support member 40, and the holder 50 constitute a so-called projector-type lamp unit.

The light source section 10 has a light source 11 and a substrate 12 . In this embodiment, the light source 11 is, for example, a semiconductor type light source such as an LED. The light source 11 has a light emitting surface 11a. When the vehicle headlamp 100 is attached to a vehicle, the light emitting surface 11a is directed upward, for example, and arranged parallel to a horizontal plane. A plurality of, for example, three, light sources 11 are supported on the substrate 12 . The light source section 10 is supported by the base 41 of the support member 40 .

Reflector 20 reflects light from light source 11 toward lens 30 . The reflector 20 is arranged above the light source 11, and is made of a highly heat-resistant and light-impermeable material such as a holder. The reflector 20 is fixed to the support member 40 with a fixing member such as a screw.

The reflector 20 has a hollow shape with open front and lower portions and closed rear and upper and left and right side portions. A first reflecting surface 21 and a second reflecting surface 22 are formed on the inner surface of the reflector 20 . The first reflecting surface 21 and the second reflecting surface 22 reflect light from the light source 11 toward the lens 30 . The first reflecting surface 21 and the second reflecting surface 22 are spheroids or free-form surfaces based on the spheroids.

The lens 30 is arranged in front of the vehicle with respect to the reflector 20 . The lens 30 is supported by a lens holder 35, for example. The optical axis of lens 30 coincides or substantially coincides with the optical axis of reflector 20 . Lens 30 has an entrance surface 31 and an exit surface 32 . Reflected light from the reflecting surface 21 is incident on the incident surface 31 .

The support member 40 supports the light source section 10 . Further, the support member 40 supports the reflector 20, the lens holder 35, and the like. The support member 40 can be manufactured using die molding or the like, for example. As the support member 40, for example, an aluminum die-cast heat sink having heat dissipation properties may be used. The support member 40 has a base 41 and fins 42 .

FIG. 2 is a perspective view showing the light source section 10 and the support member 40. As shown in FIG. FIG. 3 is a diagram showing an example of the light source section 10 and the support member 40 viewed from above. 4 is a cross-sectional view taken along the line AA in FIG. 3. FIG. As shown in FIGS. 2-4, the base 41 has a bottom support 43, side supports 45, and ribs 46. As shown in FIG. The bottom support part 43 is arranged in the base 41 at a position corresponding to the substrate 12 of the light source part 10 and is provided so as to protrude upward from the upper surface of the base 41 .

The fins 42 are arranged on the lower surface of the base 41 . Heat generated in the light source 11, which is a semiconductor light source, is radiated to the outside from the substrate 12 and the bottom support portion 43 via the base 41 and the fins 42. As shown in FIG. Note that the bottom support portion 43 and the base 41 may be integrally formed as a heat sink.

The side supports 45 are arranged on the base 41 and support the sides of the substrate 12 . The side support portions 45 are arranged along the four sides of the substrate 12 . Two side support portions 45 are arranged for each side of the substrate 12, and a total of eight side support portions 45 are provided. Each side support portion 45 is formed, for example, in a columnar shape, and contacts the side portion of the substrate 12 at one point on the peripheral surface when viewed from above.

Hereinafter, when distinguishing between the side support portions 45, the two side support portions 45 arranged behind the substrate 12 are referred to as side support portions 45a and 45b, and the two side support portions 45 arranged forward relative to the substrate 12 are referred to as side support portions 45a and 45b. The two side support portions 45 are referred to as side support portions 45c and 45d. Further, of the four side support portions 45 arranged on the left and right sides of the substrate 12, the two side support portions 45 arranged on the rear side are referred to as side support portions 45e and 45f and arranged on the front side. The two side support portions 45 are referred to as side support portions 45g and 45h.

The rib portion 46 is provided in a portion of the base 41 surrounded by the holder 50 . The rib portion 46 blocks sunlight. The height h<b>1 of the rib portion 46 is higher than at least one of the height h<b>2 of the side support portion 45 and the height h<b>3 of the holder 50 . In this embodiment, the rib portion 46 protrudes from the base 41 to a position higher than the height of the side support portion 45 and the holder 50 . That is, when the surface 41a of the base 41 is used as a reference height, the height (vertical dimension) h1 of the rib portion 46 is higher than the height h2 of the side support portion 45 and the height h3 of the holder 50 (Fig. 4).

The rib portion 46 is arranged laterally with respect to the substrate 12 in the left-right direction. In this embodiment, the rib portions 46 are arranged on both sides in the left-right direction with respect to the substrate 12 . The rib portion 46 is arranged in a space formed between the side support portion 45 and the holder 50 when viewed from above. In other words, the rib portion 46 is arranged at a position closer to the holder 50 than the side support portion 45 with respect to the substrate 12 .

The rib portion 46 is arranged at a first position P1 and a second position P2 on the rear side of the light source 11 and a third position P3 and a fourth position P4 on the front side of the light source 11 . Hereinafter, when distinguishing the rib portions 46, the rib portions 46 arranged at the first position P1, the second position P2, the third position P3, and the fourth position P4 are referred to as rib portions 61, 62, 63, and 64, respectively. do.

The rib portions 61 and 62 arranged at the first position P1 and the second position P2 are arranged in at least one of the front-rear direction and the left-right direction more than the rib portions 63 and 64 arranged at the third position P3 and the fourth position P4. Directional dimensions can be increased. In the present embodiment, the rib portions 61 and 62 are larger than the rib portions 63 and 64 in the front-rear direction. Moreover, the rib portions 61 and 62 are larger in lateral dimension than the rib portions 63 and 64 .

The rib portions 46 are arranged along the inner circumference of the holder 50 respectively. The rib portion 46 is arranged so that the distance D from the inner circumference of the holder 50 is constant (see FIG. 3). The rib portion 61 arranged at the first position P<b>1 has a surface 61 a and a surface 61 b facing the inner peripheral surface of the holder 50 . The surface 61 a faces the surface 50 a that is part of the inner peripheral surface of the holder 50 . The surface 61 a is arranged parallel or substantially parallel to the surface 50 a of the holder 50 . The surface 61 b faces the surface 50 b that is part of the inner peripheral surface of the holder 50 . The surface 61 b is arranged parallel or substantially parallel to the surface 50 b of the holder 50 . Similarly, the rib portion 62 arranged at the second position P2 has a surface 62a and a surface 62b facing the inner peripheral surface of the holder 50. As shown in FIG. The surface 62 a faces the surface 50 c that is part of the inner peripheral surface of the holder 50 . The surface 62 a is arranged parallel or substantially parallel to the surface 50 c of the holder 50 . The surface 62 b faces a surface 50 d that is part of the inner peripheral surface of the holder 50 . The surface 62b is arranged parallel or substantially parallel to the surface 50d of the holder 50. As shown in FIG.

Further, the rib portion 63 arranged at the third position P3 has a surface 63a and a surface 63b facing the inner peripheral surface of the holder 50. As shown in FIG. The surface 63 a faces the surface 50 a of the holder 50 . The surface 63 a is arranged parallel or substantially parallel to the surface 50 a of the holder 50 . The surface 63 b faces a surface 50 e that is part of the inner peripheral surface of the holder 50 . The surface 63b is arranged parallel or substantially parallel to the surface 50e of the holder 50. As shown in FIG. Similarly, the rib portion 64 arranged at the fourth position P4 has a surface 64a and a surface 64b facing the inner peripheral surface of the holder 50. As shown in FIG. The surface 64 a faces the surface 50 c of the holder 50 . The surface 64 a is arranged parallel or substantially parallel to the surface 50 c of the holder 50 . The surface 64 b faces a surface 50 f that is part of the inner peripheral surface of the holder 50 . The surface 64b is arranged parallel or substantially parallel to the surface 50f of the holder 50 .

Each rib portion 46 is provided integrally with the side support portion 45 . In this embodiment, the rib portions 61 and 62 are provided integrally with the side support portions 45e and 45f, respectively. For example, the ribs 61 and 62 protrude upward from end portions of the side support portions 45e and 45f on the holder 50 side, and are provided in a state of extending toward the holder 50 side. Similarly, rib portions 63 and 64 are provided integrally with side support portions 45g and 45h, respectively. The rib portions 63 and 64 protrude upward from end portions of the side support portions 45g and 45h on the holder 50 side and are provided in a state of being extended toward the holder 50 side.

The holder 50 is arranged on the base 41 of the support member 40 . The holder 50 is not limited to the case where three light sources 11 are arranged as in the present embodiment, and the same size and shape can be applied even when four or more, for example, five light sources 11 are arranged in the horizontal direction. be able to. When four or more light sources 11 are arranged in the horizontal direction, the size of the substrate in the horizontal direction becomes larger than in the configuration of this embodiment. In order to prevent interference with the substrate and the side support portions even in such a case, the holder 50 is dimensioned so that a space is provided in the left-right direction between the substrate 12 and the side support portions 45 in this embodiment. is set. With this configuration, the holder 50 having the same configuration can be applied regardless of the number of light sources 11 , that is, the dimensions of the substrate 12 .

The holder 50 has a main body portion 51 formed using a resin material, and first terminals 52 and second terminals 53 formed using a metal material. The body portion 51 is formed, for example, in a rectangular annular shape. The body portion 51 is arranged at a position surrounding the substrate 12 and the side support portion 43 when viewed from above. The body portion 51 has, for example, a shape surrounding a cross-shaped space when viewed from above.

The first terminals 52 are arranged on the front side and the rear side of the body portion 51 respectively. The first terminal 52 connects the substrate 12 from above. The second terminals 53 are arranged on the right and left sides of the body portion 51, respectively. The second terminal 53 is supported between the lateral side surface of the substrate 12 and the inner peripheral surface of the holder 50 and arranged in an elastically deformed state. The second terminal 53 connects the substrate 12 from both sides in the left-right direction by elastically deforming.

Returning to FIG. 1 , the shade 60 is made of a member such as a metal plate that can block the light from the light source 11 . A shade 60 is arranged between the light source 11 and the lens 30 . The shade 60 is connected to a drive unit (not shown), and is movable between, for example, a first position where part of the light reflected by the reflector 20 is blocked and a second position where the light is not blocked. ing.

In the vehicle headlamp 100 configured as described above, for example, when the lighting switch provided in the vehicle is turned off, the light source 11 is turned off. When the lighting switch is turned on from this state, the light source 11 is turned on. When the light source 11 is turned on, light is emitted from the light emitting surface 11 a and reflected by the first reflecting surface 21 and the second reflecting surface 22 of the reflector 20 toward the lens 30 . The light reflected by the reflector 20 enters the incident surface 31 , passes through the inside of the lens 30 , and exits from the exit surface 32 .

5 and 6 are diagrams showing an example of a case where sunlight is incident on the vehicle headlamp 100 according to this embodiment. As shown in FIGS. 5 and 6, sunlight L1 and L2 may enter the vehicle headlamp 100 in some cases. Sunlights L1 and L2 are incident, for example, from the exit surface 32 of the lens 30, and exit from the entrance surface 31 in a condensed state toward the reflector 20 side. The sunlight L1, L2 emitted from the incident surface 31 is reflected by the first reflecting surface 21 and the second reflecting surface 22 of the reflector 20, and as shown in FIG. It advances diagonally downward above the In this embodiment, since the rib portion 46 is provided at a position higher than the height of the holder 50, the rib portion 46 blocks the sunlight L1 and L2.

FIG. 7 is a diagram showing an example of a case where sunlight is incident on the vehicle headlamp 200 according to the comparative example. In the vehicle headlamp 200 shown in FIG. 7 , the bottom portion of the substrate 112 is supported by the bottom support portion 143 and the side portions of the substrate 112 are supported by the side support portions 145 . This vehicle headlamp 200 is not provided with a configuration corresponding to the rib portion 46 described in the above embodiment. As shown in FIG. 7, sunlight L3 incident on the vehicle headlamp 200 and condensed on the reflector side by a lens (not shown) is reflected by the first reflecting surface and the second reflecting surface of the reflector. The sunlight L3 travels obliquely downward above the substrate 112 and the support member 140 toward the holder 150, as shown in FIG. When the sunlight L3 reaches the holder 150 and irradiates the body portion 151 of the holder 150 with the sunlight L3, the temperature of the body portion 151 of the resin-made holder 150 rises, and there is a possibility that deformation or the like may occur. .

In contrast, the vehicle headlamp 100 according to the present embodiment includes a light source unit 10 having a light source 11 and a substrate 12 that supports the light source 11, a reflector 20 that reflects the light from the light source 11, and the reflector 20. A lens 30 having an incident surface 31 on which reflected light is incident and an output surface 32 from which the light incident on the incident surface 31 is emitted to an irradiation area in front of the vehicle, a base 41 supporting the bottom of the substrate 12, and a base. A support member 40 having a side support portion 45 arranged on the base 41 and supporting the side portion of the substrate 12 , and a support member 40 made of resin and arranged at a position surrounding the substrate 12 and the side support portion 45 in the base 41 . , and a holder 50 for fixing the substrate 12 to the support member 40 , and the support member 40 has rib portions 46 for shielding sunlight in a portion of the base 41 surrounded by the holder 50 .

According to this configuration, the portion of the base 41 surrounded by the holder 50 is provided with the rib portion 46 for blocking sunlight. The rib portion 46 can shield the sunlight that is reflected by and is directed toward the holder 50 . As a result, it is possible to suppress the holder 50 from being irradiated with the sunlight condensed by the lens 30 , so that the influence of the sunlight can be suppressed.

In the vehicle headlamp 100 according to this embodiment, the rib portion 46 is provided so as to protrude from the base 41 to a position higher than the height of the side support portion 45 and the height of the holder 50 . As a result, the sunlight traveling obliquely downward toward the holder 50 above the substrate 12 and the support member 40 can be blocked more reliably.

In the vehicle headlamp 100 according to this embodiment, the rib portion 46 is arranged between the side support portion 45 and the holder 50 . As a result, the sunlight reflected by the reflector 20 and going over the side support portion 45 toward the holder 50 can be reliably blocked.

In the vehicle headlamp 100 according to the present embodiment, the rib portion 46 is arranged on at least one side in the left-right direction with respect to the light source portion 10 when the vehicle is mounted. As a result, the sunlight traveling obliquely downward along the left-right direction from the reflector 20 can be efficiently blocked.

In the vehicle headlamp 100 according to the present embodiment, the rib portion 46 has a first position P1 and a second position P2 on the rear side of the light source 11 and a third position P3 on the front side of the light source 11 when the vehicle is mounted on the vehicle. and the fourth position P4. Thereby, the sunlight can be shielded on both the rear side and the front side of the light source 11 .

In the vehicle headlamp 100 according to this embodiment, the rib portions 61 and 62 arranged at the first position P1 and the second position P2 on the rear side of the light source 11 are arranged at the third position P3 on the front side of the light source 11. and the dimension in at least one of the front-rear direction and the left-right direction is larger than the rib portions 63, 64 arranged at the fourth position P4. Sunlight entering the vehicle headlamp 100 enters from the front and travels rearward inside the vehicle headlamp 100 . Therefore, by increasing the dimensions of the rib portions 61 and 62 arranged at the rear first position P1 and the second position P2, the sunlight can be efficiently blocked.

In the vehicle headlamp 100 according to this embodiment, the rib portion 46 is provided integrally with the side support portion 45 . With this configuration, the space on the inner peripheral side of the holder 50 can be efficiently used.

In the vehicle headlamp 100 according to this embodiment, the rib portion 46 is arranged along the inner circumference of the holder 50 . With this configuration, it is possible to block the sunlight that enters the holder 50 from various angles.

In the vehicle headlamp 100 according to this embodiment, the rib portion 46 is arranged so that the distance from the inner circumference of the holder 50 is constant. With this configuration, it is possible to block the sunlight that enters the holder 50 from various angles.

The technical scope of the present invention is not limited to the above embodiments, and modifications can be made as appropriate without departing from the scope of the present invention. For example, in the above-described embodiment, the configuration in which the rib portion 46 is provided integrally with the side portion support portion 45 has been described as an example, but the present invention is not limited to this. FIG. 8 is a diagram showing a configuration of part of a vehicle headlamp 100A according to a modification. As shown in FIG. 8, in the support member 40A of the vehicle headlamp 100A, the rib portions 46 can be separated from the side support portions 45 and provided separately. That is, the rib portions 65, 66, 67, and 68 arranged at the first position P1, the second position P2, the third position P3, and the fourth position P4, respectively, are not the side support portions 45p, 45q, 45r, and 45s. It can be configured to be provided separately.

Further, in the above-described embodiment, an example in which the rib portion 46 is configured along the inner circumference of the holder 50 has been described, but the present invention is not limited to this. For example, the rib portion 46 may be configured to be inclined with respect to the inner circumference of the holder 50 .

D... distance, L1, L2, L3... sunlight, P1... first position, P2... second position, P3... third position, P4... fourth position, 10... light source section, 11... light source, 11a... light emitting surface , 12, 112... Substrate 20... Reflector 21... First reflecting surface 22... Second reflecting surface 30... Lens 31... Entrance surface 32... Output surface 35... Lens holder 40, 40A, 140... Support member 41 Base 41a Surface 42 Fin 43, 143 Bottom support 45, 45a to 45h, 45p to 45s, 145 Side support 46, 63 to 68 Rib 61a , 61b, 62a, 62b, 63a, 63b, 64a, 64b, 50a to 50f... faces, 50, 150... holder, 51... main body, 52... first terminal, 53... second terminal, 60... shade, 100, 100A, 200...Vehicle headlamp

Claims (9)

a light source unit having a light source and a substrate supporting the light source;
a reflector that reflects light from the light source;
a lens having an incident surface on which the light reflected by the reflector is incident, and an output surface from which the light incident on the incident surface is emitted to an irradiation area in front of the vehicle;
a support member having a base that supports a bottom portion of the substrate; and a side support portion that is disposed on the base and supports a side portion of the substrate;
a holder made of resin, disposed at a position surrounding the substrate and the side support portion of the base, and fixing the substrate to the support member;
The vehicle headlamp, wherein the support member has a rib portion that blocks sunlight in a portion of the base that is surrounded by the holder. The vehicle headlamp according to claim 1, wherein the rib portion is provided to protrude from the base to a position higher than at least one of the side support portion and the holder. The vehicle headlamp according to claim 1 or 2, wherein the rib portion is arranged at a position between the side support portion and the holder. The vehicle headlamp according to any one of claims 1 to 3, wherein the rib portion is arranged on at least one side of the light source portion in a left-right direction when the vehicle is mounted on the vehicle. The vehicle headlamp according to any one of claims 1 to 4, wherein the rib portion is arranged at a position on the rear side of the light source and a position on the front side of the light source when the vehicle is mounted on the vehicle. light. The rib portion arranged at a position on the rear side of the light source has a larger dimension in at least one of the front-rear direction and the left-right direction than the rib portion arranged at the position on the front side of the light source. 6. The vehicle headlamp according to 5. The vehicle headlamp according to any one of claims 1 to 6, wherein the rib portion is provided integrally with the side support portion. The vehicle headlamp according to any one of claims 1 to 7, wherein the rib portion is arranged along the inner circumference of the holder. The vehicle headlamp according to any one of claims 1 to 8, wherein the rib portion is arranged such that the distance from the inner circumference of the holder is constant.

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