JP2018032512A - Vehicular head lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular head lamp capable of attaining illumination for daylight of light distribution with a desired width, with its enlargement suppressed.SOLUTION: A vehicular head lamp 1 includes: a reflector 50 having a concave reflection surface 52; a first light source 41a configured to emit first light Lfor nighttime illumination reflected on the reflection surface 52 and radiated forward; and a second light source 42a configured to emit light Lfor daytime illumination reflected on the reflection surface 52 and radiated forward. The second light source 42a comprises a light guide 42P configured to emit the second light Lfrom a side surface, and a part of the light guide 42P extends in a right-left direction even in front of the first light source 41a.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicular headlamp, and more particularly to a vehicular headlamp capable of realizing daytime illumination with a desired light distribution while suppressing an increase in size.

  Vehicle headlamps typified by headlights for automobiles are equipped with daytime running lamps (DRL) to indicate the presence of vehicles in the daytime, in addition to light sources for low beams and high beams to illuminate the front at night. Is known. The light from the daytime running lamp includes light irradiated above the low beam, and the light from the daytime running lamp can be viewed from a position higher than the low beam. Some vehicle headlamps have a plurality of lamp units arranged from the viewpoint of design and the like.

  Patent Document 1 below describes a vehicle headlamp having a low beam and a daytime running lamp. The vehicle headlamp disclosed in Patent Document 1 is provided with a light source unit for night illumination such as a low beam and a light source unit for daytime running lamp, that is, daytime illumination, in one lamp chamber. Yes. In addition, LEDs are used both as a night light source and a day light source of the vehicle headlamp, and the light emitted from the night light LED is reflected by the reflector of the night light source unit and emitted. The light emitted from the LED for daytime illumination is reflected by the reflector of the light source unit for daytime illumination and emitted.

JP 2014-165150 A

  In the vehicle lamp of Patent Document 1, the light source unit for night illumination and the light source unit for daytime illumination are provided in the lamp chamber as described above, and thus the light emitted from each unit can be controlled for each unit. The vehicle headlamps tend to increase in size as a whole. Therefore, in order to suppress an increase in the size of the vehicle headlamp, it is conceivable to emit light for daytime illumination from a light source unit for nighttime illumination. For this reason, light emitted from a light source for daytime illumination is illuminated at nighttime. It is conceivable that the light is reflected by a reflector of the light source unit for output. In this case, it is necessary to arrange a light source that emits light for daytime illumination at a position that does not hinder the propagation of light from the light source that emits light for nighttime illumination to the reflector. In this case, it is conceivable to arrange the light source for daytime illumination ahead of the light source for nighttime illumination. However, since the reflector of the light source unit for night illumination is shaped to match the light distribution of the low beam or high beam, if the light source for daytime illumination is arranged in this way, the light distribution width of the daytime illumination becomes narrower. Tend.

  Then, an object of this invention is to provide the vehicle headlamp which can implement | achieve daytime illumination of the light distribution of desired width | variety, suppressing enlargement.

  To achieve the above object, a vehicle headlamp according to the present invention includes a reflector having a concave reflecting surface, and a first light that is reflected by the reflecting surface and emits a first light for night illumination that is irradiated forward. A light guide that emits second light for daytime illumination that is reflected by the reflecting surface and irradiated forward, and the second light source emits the second light from a side surface. A part of the light guide extends in the left-right direction in front of the first light source.

  According to such a vehicle headlamp, the reflector that reflects the first light for night illumination emitted from the first light source and the reflector that reflects the second light for daytime illumination emitted from the second light source. Compared to the case where the reflector that reflects the light for night illumination and the reflector that reflects the light for daytime illumination are separate, as in the vehicle headlamp described in Patent Document 1 above. And can be downsized. Moreover, since the 2nd light source which radiate | emits 2nd light for daytime illumination is arrange | positioned ahead of a 1st light source, it suppresses that a 2nd light source inhibits propagation to the reflector of 1st light. Can do. Furthermore, since the second light source is a light guide extending in the left-right direction, and the second light is emitted from the side surface of the light guide, the second light is wider than light emitted from a point light source such as an LED. Can be a wide light. For this reason, the width | variety of the light reflected by a reflector and irradiated as light for daytime illumination can be enlarged. Thus, according to the vehicle headlamp of the present invention, daytime illumination with a desired light distribution can be realized while suppressing an increase in size.

  It is preferable that a portion of the light guide positioned in front of the first light source overlaps the first light source in the horizontal direction.

  When comprised in this way, the width | variety of the up-down direction of a vehicle headlamp can be made small. In general, the circuit board is arranged such that the main surface is horizontal or vertical. By arranging the main surface of the circuit board horizontally, the substrate on which the first light source is arranged and the light guide are arranged. The board can be shared, and the number of parts can be reduced.

  The vehicular headlamp includes a plurality of lamp units, and each of the lamp units includes the reflector, the first light source, and the second light source, and the lamp units in the lamp units adjacent to each other. The light guides are preferably connected to each other.

  In this case, since the second light propagates between the light guides in each lamp unit, it is not necessary to provide a light source for emitting the light in each lamp unit, and the number of light sources can be reduced. Therefore, the vehicular headlamp can have a simpler multi-lamp configuration.

  As described above, when the portion of the light guide located in front of the first light source overlaps the first light source in the horizontal direction, the periphery of the first light source is surrounded by the light guide. preferable.

  In this case, the second light source is located on the rear side and the front side of the first light source. Therefore, the second light for daytime illumination can be a light distribution that is thicker in the vertical direction than the light distribution of the first light for nighttime illumination.

  In addition, it is preferable that a light shielding member is formed on a front side surface of a portion of the light guide positioned in front of the first light source.

  In this case, the first light source can be prevented from being visually recognized when viewed from the front side, and light that is not reflected by the reflector and has an unintended light distribution can be prevented from being emitted from the front of the light guide. it can.

  In this case, it is preferable that the rear surface of the light shielding member is a sub-reflection surface that reflects at least the second light toward the reflection surface.

  In this case, a part of the light that should be emitted forward from the light guide can be reflected by the reflector by being reflected by the sub-reflecting surface, and the light emitted from the second light source can be effectively utilized.

  Furthermore, it is preferable that a part of the light from the first light source is reflected by the sub-reflection surface toward the reflection surface.

  In this case, of the light emitted from the first light source, a part of the light emitted forward without going to the reflector is reflected from the position before the first light source toward the reflector. Therefore, the light reflected by the sub-reflecting surface and reflected forward by the reflecting surface of the reflector is emitted from the first light source, propagates directly to the reflector, and is reflected forward by the reflecting surface. There is a tendency to irradiate upward from light. In this way, the light irradiated upward during night illumination can be used as overhead sign (OHS) visual recognition light such as a sign during low beam emission. Therefore, it is possible to suppress the necessity of separately providing a light source that emits light for visually recognizing overhead signs.

  The second light source is preferably provided on each of the upper side and the lower side of the reflecting surface.

  In this case, since the daytime illumination light can be incident on the reflecting surface of the reflector from both the upper side and the lower side, the reflecting surface of the reflector can be illuminated more brightly and uniformly during daylighting.

  As described above, according to the vehicle headlamp of the present invention, daytime illumination with a desired light distribution can be realized while suppressing an increase in size.

It is a front view showing an outline of a vehicle provided with a vehicle headlamp in the first embodiment of the present invention. It is an enlarged view of the vehicle headlamp of FIG. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the horizontal surface of a part of vehicle headlamp of FIG. It is a figure which shows light distribution. It is sectional drawing which sees the vehicle headlamp in 2nd Embodiment of this invention from the same viewpoint as FIG. It is sectional drawing which sees a part of vehicle headlamp in 2nd Embodiment from the same viewpoint as FIG. It is sectional drawing which sees the vehicle headlamp in 3rd Embodiment of this invention from the same viewpoint as FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the vehicle headlamp which concerns on this invention is illustrated with an accompanying drawing. The embodiments exemplified below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved from the following embodiments without departing from the spirit of the present invention.

(First embodiment)
First, the configuration of the vehicular lamp according to the present embodiment will be described.

  FIG. 1 is a front view showing an outline of a vehicle provided with a vehicle headlamp in the present embodiment. As shown in FIG. 1, the vehicle 100 includes a pair of vehicle headlamps in each of the front left and right directions. That is, each of the vehicle headlamps 1 is disposed outside the center of the vehicle 100 in the left-right direction. In addition, the pair of vehicle headlamps 1 provided in the vehicle 100 are symmetrical to each other in the left-right direction. In the present embodiment, the vehicular headlamp 1 includes a plurality of lamps 1a, 1b, and 1c arranged side by side, the lamp 1c is positioned on the most central side in the left-right direction of the vehicle, and the lamp 1a is positioned in the left-right direction of the vehicle. The lamp 1b is located between the lamp 1a and the lamp 1c.

  FIG. 2 is an enlarged view of the vehicle headlamp 1 of FIG. As shown in FIG. 2, the lamp 1a includes a lamp unit LUa, the lamp 1b includes a lamp unit LUb, and the lamp 1c includes a lamp unit LUc. Each of the lamp units LUa, LUb, LUc includes a reflector 50, the lamp unit LUa includes a first light source 41a and a second light source 42a, and the lamp unit LUb includes a first light source 41b and a second light source 42b. The lamp unit LUc includes a first light source 41c and a second light source 42c.

  In the present embodiment, the lamp units LUa, LUb, and LUc have substantially the same configuration as each other, and thus the lamp 1a will be mainly described as an example. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a cross-sectional view of a part of the horizontal plane including the lamp 1a of the vehicle headlamp of FIG. 2 is a conceptual diagram for ease of understanding, and some of the members shown in FIG. 3 are omitted. As shown in FIGS. 3 and 4, the lamp 1 a which is a part of the vehicle headlamp 1 includes a housing 10, and the lamp unit LUa is accommodated in the housing 10.

  The housing 10 includes a lamp housing 11, a front cover 12, and a back cover 13 as main components. The front of the lamp housing 11 is open, and the front cover 12 is fixed to the lamp housing 11 so as to close the opening. In addition, an opening smaller than the front is formed at the rear of the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.

  A space formed by the lamp housing 11, the front cover 12 that closes the front opening of the lamp housing 11, and the back cover 13 that closes the rear opening of the lamp housing 11 is a lamp chamber LR. A lamp unit LUa is accommodated therein. As shown in FIG. 2, in this embodiment, each of the lamps 1a, 1b, and 1c includes a housing 10, but between each lamp 1a and the lamp 1b and between each lamp 1b and the lamp 1c. The wall of the housing 10 is not formed, and each lamp chamber LR is spatially connected.

  The lamp unit LUa includes a support member 30 as a main component in addition to the first light source 41a, the second light source 42a, and the reflector 50 described above.

  The support member 30 is a metal member, and includes a top plate 31, a back plate 32, and a locking portion 33. In FIG. 4, only the back plate of the support member 30 is shown for easy understanding. The top plate 31 is a plate-like metal member extending substantially horizontally, and the back plate 32 is a plate-like metal member extending substantially vertically. The rear end of the top plate 31 and the upper end of the back plate 32 are connected to each other. Further, a locking portion 33 is connected near the upper end of the back plate 32. The locking portion 33 extends rearward from the back plate 32, and the locking portion 33 is formed with a screw hole that opens to the rear side. A screw 22 is screwed into the screw hole from the outside of the lamp housing 11, and a locking portion 33 is fixed to the lamp housing 11. A screw hole is also formed on the lower side of the back plate 32, and a screw 23 is screwed into the screw hole from the outside of the lamp housing 11, and the back plate 32 is fixed to the lamp housing 11. Thus, the back plate 32 is fixed in the lamp chamber LR in a substantially vertical state, and the top plate 31 connected to the back plate 32 is also fixed in the lamp chamber LR. In addition, by adjusting these screws 22 and 23, the angle of the back plate 32 can be finely adjusted, and accordingly, the angle of the top plate 31 can be finely adjusted.

  A reflector 50 is fixed to the lower surface of the top plate 31. The reflector 50 has a reflecting surface 52. The reflecting surface 52 has a concave shape formed of a free-form surface based on a parabola that opens toward the front side. Specifically, the shape of the reflecting surface 52 in the vertical cross section is a shape below the apex when the central axis of the parabola is horizontal. Further, the shape of the reflecting surface 52 in the horizontal section is a shape including the apex of the parabola. However, the parabola in the cross section in the vertical direction of the reflection surface 52 and the parabola in the cross section in the horizontal direction may be different from each other. In addition, the shape in the horizontal cross section of the reflective surface 52 does not need to be made into the shape based on a parabola, for example, may be made into the shape based on a part of ellipse, or another concave shape.

  The reflector 50 is not particularly limited as long as it is a member that reflects light on the reflection surface 52. As a member to be a reflector, for example, a reflector body made of a resin or metal is provided with a reflecting surface 52 that is mirror-finished by metal deposition or the like.

In addition, a first light source 41 a that emits the first light L ₁ is disposed on the lower surface of the top plate 31. In the present embodiment, the first light L ₁ is light that becomes light for night illumination such as a low beam and a high beam after being reflected by the reflector 50. The first light source 41a is, for example, an LED (Light Emitting Diode). The first light source 41a is connected to a circuit board (not shown), capable of emitting a first light L ₁ by the feeding from the circuit board. The light emission surface of the first light source 41 a is arranged on the focal point of the parabola in the vertical cross section of the reflection surface 52. Accordingly, the first part of the light L ₁ emitted from the first light source 41a as described in detail later, together with the parallel light after being reflected at different sites on the reflection surface 52 to propagate with a spread angle Is done.

Further, the front side is a reflector 50 side and the opposite side of the first light source 41a is a light guide 42P for emitting a second light L ₂ from the side surface is arranged. In the present embodiment, the second light L ₂ is light that becomes daylight illumination light after being reflected by the reflector 50. Therefore, the light guide 42P can be understood as a daytime running lamp (DRL). As shown in FIG. 2, the light guide 42 </ b> P extends in the left-right direction, and is provided on the lower surface of the top plate 31 over the respective lamp units LUa to LUc. Also, it is arranged a pair of light sources 42e so as to sandwich the two ends of the light guide 42P, the light source 42e is incident from both ends of the light guide 42P the second light L ₂ in the light guide 42P. The light guide 42P is processed so that light is easily emitted to the reflector side, that is, the rear side. For example, a prism surface that causes irregular reflection is formed on the front surface of the light guide 42P. Thus, from the side surface of the light guide 42P second light L ₂ emitted at least on the rear side. A portion of the light guide 42P having such a configuration located in the lamp unit LUa is the second light source 42a in the lamp unit LUa. As described above, since the first light source 41a and the light guide 42P are both provided on the lower surface of the top plate 31, the portion of the second light source 42a that is a part of the light guide 42P is positioned in front of the first light source 41a. It overlaps with one light source 41a in the horizontal direction. In the present embodiment, the light guide 42P partially overlaps the first light source 41a in the horizontal direction so that the emission surface of the first light source 41a is hidden by the light guide 42P when viewed from the front. Accordingly, the top portion of the light guide 42P opposite to the top plate 31 side is located below the emission surface of the first light source 41a. By being configured in this manner, it is possible to prevent the second optical L ₂ emitted from the light guide 42P is shielded by the first light source 41a.

In the present embodiment, a light blocking member 60 that blocks light is provided on the side surface on the front side of the portion of the light guide 42P positioned in front of the first light source 41a. A surface on the light guide 42 </ b> P side that is a rear surface of the light shielding member 60 is a sub-reflection surface 62 that reflects light. Therefore, the second light L _{2 that} is about to be emitted forward from the portion where the light shielding member 60 is located in the light guide 42 </ b> P is reflected backward by the sub-reflection surface 62.

  Examples of the light shielding member 60 include a reflective film in which a laminate of a metal such as aluminum or a metal oxide is provided on the side surface of the light guide 42P, or a member in which a separately prepared reflector is disposed on the side surface of the light guide 42P. be able to.

Further, the lamp 1b and the lamp 1c, which are a part of the vehicle headlamp 1, are configured in the same manner as the lamp 1a as described above, and thus are not particularly described with reference to cross-sectional views. The lamp unit LUb has a first light source 41b similar to the first light source 41a instead of the first light source 41a, a second light source 42b similar to the second light source 42a, and the lamp unit LUc includes the first light source 41b. Instead of 41a, a first light source 41c similar to the first light source 41a is provided, and a second light source 42c similar to the second light source 42a is provided. A portion of the light guide 42P located in the lamp unit LUb is the second light source 42b of the lamp unit LUb, and a portion of the light guide 42P located in the lamp unit LUc is the second light source 42c of the lamp unit LUc. The positional relationship between the first light source and the second light source in each of the lamp units LUa to LUc is the same. Further, the first light source 41b, 41c are respectively in the same manner as the first light source 41a, and emits the first light _{L 1} which is a light for night lighting after reflection by the reflector 50, the second light source 42b, 42c is respectively in the same manner as the second light source 42a for emitting the second light L ₂ which is a light for daytime illumination after reflection by the reflector 50. That is, the lamps 1b and 1c emit the same light as the lamp 1a. Moreover, because it is connected to each other light guide 42P as the second light source in the lamp unit adjacent to emit respective lighting unit light L ₂ at the same time the second in LUa～LUc.

  In the lamps 1a to 1c having the above-described configuration, in the present embodiment, as shown in FIG. 2, the reflector 50 of the lamp 1a, the reflector 50 of the lamp 1b, and the reflector 50 of the lamp 1c are integrated, and the lamp 1a. The reflecting surface 52 of the reflector 50 and the reflecting surface 52 of the reflector 50 of the lamp 1b are connected, and the reflecting surface 52 of the reflector 50 of the lamp 1b and the reflecting surface 52 of the reflector 50 of the lamp 1c are connected.

  Next, light emission by the vehicle headlamp 1 will be described. As described above, the lamp 1b and the lamp 1c are configured in substantially the same manner as the lamp 1a, respectively, and will be described using the lamp 1a.

<At night illumination>
During nighttime illumination, the first light L ₁ is emitted from the first light source 41a. The first light L ₁ emitted from the first light source 41 a in the lamp _{1 a} is reflected by the reflecting surface 52 of the reflector 50 and is emitted through the front cover 12. At this time, as described above, since the first light source 41a is located on the focal point of the parabola based on the shape of the reflection surface 52 in the vertical section as described above, the first light source 41a is emitted from the same region in the emission part of the first light source 41a. Even if the light propagates with a spread angle and is reflected at different positions on the reflection surface 52, the reflected light is substantially parallel to each other. In the present embodiment, the light emitted from the lamp 1a as described above is a low beam or a high beam.

When the first light L ₁ is a low beam, at least a portion of the light distribution of the low beam by the first light source 41a is turned on is formed, the first of the light L _1, the exit portion of the first light source 41a The light emitted from the foremost region in FIG. 4 forms a low beam cut line. In this way, the low beam is emitted also from the lamps 1b and 1c, whereby the low beam light distribution shown in FIG. 5A is formed. Also, if the first light L ₁ is a high beam, by the first light source 41a is a high beam at least part of the light distribution is formed by lights, high beam is emitted from the lamp 1b, 1c, A high beam light distribution shown in FIG. 5B is formed.

In addition, the first light L ₁ emitted from the first light sources 41 a to 41 c may include light traveling forward without going to the reflector 50. In this case, at least a part of the first light L ₁ traveling forward enters the light guide 42P and is reflected by the sub-reflection surface 62. It can be understood that at least a part of the _first light L1 reflected by the sub-reflection surface 62 is light emitted from the light guide 42P. This light is emitted from the light guide 42P in front of the first light sources 41a to 41c, propagates toward the reflector 50, and is reflected by the reflecting surface 52. The light emitted from the light guide 42P and reflected by the reflecting surface 52 tends to be irradiated above the light that propagates directly from the first light sources 41a to 41c to the reflector 50 and is reflected. Thus, for example, as described above, when the first light L ₁ is a low beam, first optical L ₁ reflected by the by the reflecting surface 52 reflected by the secondary reflecting surface 62, above the cut line The light is irradiated and used as light for visually recognizing a sign (OHS: light for Over Head Sign). In FIG. 5, the light for visually recognizing the sign is not shown because its intensity is weak.

Of the first light sources 41a to 41c of the lamps 1a, 1b, and 1c, some of the first light sources may be low-beam light sources, and some of the first light sources may be high-beam light sources. In this case, at the time of low beam irradiation, the first light L ₁ is emitted from the first light sources, and a low beam light distribution is formed. Also this During high beam if, for example, from all of the first light source 41a~41c by the first light L ₁ is emitted high beam light distribution are formed. Specifically, the by the first light L ₁ from the portion of the first light source light distribution of the low beam is formed by the first light L ₁ from the first light source of the other part than the cut line The upper light distribution is formed, and the light distribution by the light from some of the first light sources and the light distribution by the light from the other first light sources are combined to form a high beam light distribution.

<During daytime lighting>
The daytime illumination time, the light source 42e second light L ₂ is emitted, the light L ₂ of the second is incident on the light guide 42P. Thus, from each of the second light source 42a~42c a part of the light guide 42P, the second light _{L 2} is emitted. At this time, a part of the light emitted from the light guide 42P is reflected by the reflecting surface 52 of the reflector 50, and the other part is emitted forward. In addition, the second light L _{2 that} is about to be emitted forward from the portion where the light shielding member 60 is located in the light guide 42 </ b> P is reflected rearward by the sub-reflection surface 62 as described above, and the reflection surface 52 of the reflector 50. Reflected by. Since the light guide 42P extending in the lateral direction, the second light _{L 2} emitted from the second light source 42a~42c is reflected by the reflecting surface 52, when the second light source is composed of a point light source such as an LED The light distribution is wider in the left-right direction. In this way, the light distribution of daytime illumination shown in FIG. 5C is formed.

As described above, the vehicle headlamp 1 according to the present embodiment includes the reflector 50 having the concave reflecting surface 52 based on the parabola, and the night illumination first light reflected by the reflecting surface 52 and irradiated forward. comprises a first light source 41a~41c for emitting first light _{L 1,} a second light source 42a~42c for emitting a second light _{L 2} of the daytime illumination to be emitted forward is reflected by the reflecting surface 52, the . The second light source 42a~42c consists light guide 42P for emitting a second light _{L 2} from the side, a portion of the light guide 42P, extends in the horizontal direction in front of the first light source 41a~41c Yes.

According to the vehicle headlamp 1, a reflector 50, reflects the second and the light _{L 2} emitted from the first light _{L 1} and the second light source 42a~42c emitted from the first light source 41a~41c . Therefore, it is possible to reduce the size compared to the case where the reflector for the first light L ₁ and the reflector for the second light L ₂ are separated. Moreover, since the 2nd light sources 42a-42c are arrange | positioned ahead of the 1st light sources 41a-41c, it can suppress that the propagation of the light which goes to the reflector 50 from the 1st light sources 41a-41c is inhibited. Further, in the present embodiment, the first light L ₁ and the second light L ₂ are reflected by the reflector 50 depending from above, and the second light sources 42a to 42c are more than the first light sources 41a to 41c as described above. Since the second light L ₂ reflected by the reflector 50 can be irradiated above the first light L ₁ . Further, the second light source 42a~42c is part of the light guide 42P extending in the lateral direction, the second light _{L 2} is to emit from the side surface of the light guide 42P, the second light _{L 2} is an LED or the like Compared with the light emitted from the point light source, the light can be wide. Therefore, it is possible to increase the width of the second light L ₂ emitted as light for reflection illuminates daytime reflector 50.

  Further, in the vehicle headlamp 1 of the present embodiment, the portion of the light guide 42P positioned in front of the first light sources 41a to 41c overlaps the first light sources 41a to 41c in the horizontal direction as described above. The width in the vertical direction of the lamp 1 can be reduced.

Further, the vehicle headlamp 1 of the embodiment, without providing a light source for emitting light since the guide 42P are connected together, the second discrete to each lamp unit light L ₂ in the lamp unit adjacent Therefore, the number of light sources can be reduced.

  In the present embodiment, since the light shielding member 60 is formed on the front side surface of the light guide 42P at the front portion of the first light sources 41a to 41c, the first light sources 41a to 41a are viewed from the front side. It can suppress that 41c is visually recognized, and can suppress that the light which is not reflected by the reflector 50 but becomes an unintended light distribution is radiate | emitted from the front of a light guide.

In the present embodiment, since the rear surface of the light shielding member 60 is the sub-reflection surface 62 that reflects at least the second light to the reflection surface 52 side, the light that should be emitted forward from the light guide 42P. Is reflected by the reflector 50 by being reflected by the sub-reflecting surface 62, the amount of the second light L2 reflected by the reflector 50 can be increased, and more _second light can be reflected. L ₂ can be dimmed.

  In the present embodiment, part of the light from the first light sources 41a to 41c is reflected by the sub-reflecting surface 62 toward the reflecting surface 52 of the reflector 50. Thus, as described above, for example, a sign at the time of low beam emission or the like The overhead sign can be used as light for visual recognition.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to FIGS. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted.

FIG. 6 is a cross-sectional view showing the vehicle headlamp of the present embodiment from the same viewpoint as FIG. 3, and FIG. 7 shows a part of the vehicle headlamp of the present embodiment from the same viewpoint as FIG. It is sectional drawing. In the vehicle headlamp of the present embodiment, the shape of the light guide 42P is different from the shape of the light guide 42P of the first embodiment. As shown in FIG. 7, the light guide 42P of this embodiment branches into two in a predetermined section in the lamp unit LUa, and the periphery of the first light source 41a is surrounded by the light guide 42P. In the present embodiment, the light guide 42P is, rear portion 42P has an _r, front part 42P _f and rear portion 42P _r located in front part 42P _f and rear side located on the front side of the first light source 41a and the second It is a part of the light source 42a.

The front part 42P _f has the same configuration as the second light source 42a of the first embodiment. Further, the side surface of the front side of the front part 42P _f provided light shielding member 60, the rear side surface of the light shielding member 60 is a secondary reflecting surface 62. On the other hand, in this embodiment, the rear portion 42P _r is that there is generally semi-circular shape of the cross section, vertical thickness of the rear portion 42P _r is smaller than the thickness of the front part 42P _f. By being configured in this manner, it is possible to prevent the second optical L ₂ propagating toward the rear portion 42P _r to the reflector 50 side is blocked. Although not shown, the top of the rear portion 42P _r is more preferably located in the top plate 31 side of the exit surface of the first light source 41a. By being configured in this manner, it is possible to first light L ₁ propagating toward the first light source 41a on the reflector 50 side is prevented from being blocked by the rear portion 42P _r.

Although not shown, the lamp unit LUb, second light source 42b in LUc, also light guides 42P of 42c, similarly to the light guide 42P of the second light source 42a in the lamp unit LUa, front part 42P _f and rear portion 42P _r Each of the first light sources 41b and 41c is surrounded by a light guide 42P.

In the vehicle headlamp of the present embodiment, the periphery of the first light source 41a~41c is surrounded by the light guide 42P having a front part 42P _f and rear portion 42P _r, it is emitted from the rear portion 42P _r reflector The light reflected at 50 is irradiated relatively upward. Thus, the first light source 41a~41c rear side and that the second light source 42a~42c is positioned on the front side, the first and the second light distribution of the light _{L 2} daytime lighting for night lighting than the light distribution of the light L ₁ may be a thick light distribution in the vertical direction.

In the present embodiment, the shape of the cross section of the rear portion 42P _r is different from the shape of the cross section of the front part 42P _f, and the cross-sectional shape of the cross-sectional shape and the rear portion 42P _r of the front part 42P _f It may be the same.

(Third embodiment)
Next, a third embodiment of the present invention will be described in detail with reference to FIG. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted.

FIG. 8 is a view showing the vehicle headlamp of the present embodiment from the same viewpoint as FIG. In the vehicle headlamp of the present embodiment, the second light source is provided on each of the upper side and the lower side of the reflecting surface 52 of the reflector 50. A second light source 42 a _u is provided on the upper side of the reflector 50, and a second light source 42 a _d is provided on the lower side of the reflector 50. Each of the second light source _42a u, 42a _d is a part of the likewise light guide 42P in the first embodiment. However, the light guide 42P of the present embodiment is different from the light guide 42P of the first embodiment in that the cross-sectional shape is circular.

Each light guide 42P is covered with a light guide cover 43 made of a light guide having a substantially U-shaped cross section. The second light source 42 a _u is covered with a light guide cover 43 at the front, lower and rear, and the second light source 42 a _d is covered with a light guide cover 43 at the front, upper and rear. The light guide cover 43 has each of the second light source _42a u, the function of the second lens for dimming the light L2 emitted from 42a _d. The light guide cover 43 is milky white and can scatter light incident on the inside.

  A light shielding plate 65 is disposed in front of each light guide cover 43. The light shielding plate 65 prevents the light guide cover 43 and the light guide 42P from being visually recognized from the front of the vehicle lamp.

Although not particularly shown, the lamp unit LUb Oite also second light sources of the second light source 42a _u similar configuration is provided on the upper side of the reflector 50, similar to the second light source 42a _d on the lower side of the reflector 50 the second light source is provided in the configuration, the lamp unit LUc Oite also the second light source having the same structure as the second light source 42a _u is provided on the upper side of the reflector 50, the second light source 42a on the lower side of the reflector 50 _A second light source having the same configuration as _d is provided. Further, in the lamp units LUb and LUc, the same light guide cover 43 and light shielding plate 65 as those in the lamp unit LUa are arranged.

Each of the second light source _42a u, from 42a _d, the second light _{L 2} is emitted towards the reflector 50, the second light _{L 2} is emitted forward is reflected by the reflecting surface 52, Day lighting Is irradiated. Similarly, in the lamp units LUb and LUc, the second light L ₂ directed toward the reflector 50 is emitted from the respective second light sources provided at the upper and lower portions of the reflector 50, and the second light L _2. Is reflected by the reflecting surface 52 and irradiated forward, and is illuminated by daytime illumination. In order to avoid that the figure becomes complicated, the second light L ₂ emitted from the second light source 42a _d below are omitted.

According to the vehicle headlamp of the present embodiment, the second light sources 42 a _u and 42 a _d are provided on the upper side and the lower side of the reflecting surface 52, respectively. Light for illumination can be incident, and the reflecting surface 52 can be illuminated more brightly and uniformly during daytime illumination.

In the present embodiment, the second light sources 42 a _u and 42 a _d are arranged on the upper side and the lower side of the reflector 50. However, a second light source including the light guide 42 P may be arranged on the side of the reflector 50. . In this case, the light guide 42 </ b> P can surround the edge of the reflector 50.

  The present invention has been described above by taking the first to third embodiments as examples, but the present invention is not limited to these.

  For example, in the above embodiment, the vehicle headlamp has the three lamps 1a to 1c, but the number of lamps is not limited to three, and may be four or more, or three or less. Moreover, in the said embodiment, although the lamps 1a-1c were arranged in the left-right direction, the arrangement | positioning of a some lamp is not restricted to this, You may arrange in the up-down direction, may be arranged diagonally, and is U-shaped. May be arranged.

  Moreover, in the said embodiment, although the reflector 50 of each lamp 1a-1c was united, the reflector 50 of each lamp 1a-1c may be made into a different body.

  Also in the first and second embodiments, a light shielding plate may be provided as in the third embodiment, and in this case, the design can be improved.

  In the first and second embodiments, the portion of the light guide 42P positioned in front of the first light sources 41a to 41c is configured to overlap the first light sources 41a to 41c in the horizontal direction. However, for example, the light guide 42P may be positioned above or below the first light sources 41a to 41c in front of the first light sources 41a to 41c.

In the above embodiment, the light guides 42P in the adjacent lamp units are connected to each other, but the light guide 42P may be provided separately for each lamp unit. However, from the viewpoint such as to reduce the number of light sources for emitting the second light L ₂ to be incident on the light guide 42P, the light guide 42P located each lamp unit as in the above embodiment is preferably to be integrated .

  In the first and second embodiments, the light shielding member 60 is provided. However, the light shielding member 60 is not essential, and the light shielding member 60 may be omitted. Even if the light shielding member 60 is provided, the rear surface of the light shielding member 60 may not be a sub-reflection surface. Further, the light shielding member 60 may be provided on the entire front surface of the light guide 42P.

  In the third embodiment, the light guide cover 43 is provided, but the light guide cover may not be provided. In this case, the surface of the light guide 42P may be processed so that light emitted to the rear side of the light guide 42P is scattered.

  Moreover, in the said embodiment, in the lamps 1a-1c, the reflector 50 was fixed to the top plate 31, and was made into the shape extended below from upper direction. However, the present invention is not limited to this, and at least one of the respective lamps 1a to 1c may be shaped upside down.

  Further, the second light sources 42a to 42c may be turned on together with the first light sources 41a to 41c during night illumination.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle headlamp which can implement | achieve the daytime illumination of the light distribution of desired width | variety, suppressing enlargement is provided, and can be utilized in the field | area of vehicle headlamps, such as a motor vehicle. is there.

DESCRIPTION OF SYMBOLS 1 ... Vehicle headlamps 1a-1c ... Lamp 10 ... Case LUa-LUc ... Lamp unit 30 ... Support member 31 ... Top plate 32 ... Back plate 41a- 42c ... first light source 42 a to 42 c ... second light source 42P ... light guide 50 ... reflector 52 ... reflective surface _L 1 ... first light _L 2 ... second light

Claims (8)

A reflector having a concave reflecting surface;
A first light source that emits first light for night illumination that is reflected by the reflecting surface and irradiated forward;
A second light source that emits second light for daytime illumination that is reflected by the reflecting surface and irradiated forward;
With
The second light source comprises a light guide that emits the second light from a side surface,
A part of the light guide extends in the left-right direction in front of the first light source. 2. The vehicular headlamp according to claim 1, wherein a portion of the light guide positioned in front of the first light source overlaps the first light source in a horizontal direction. With multiple lamp units,
Each of the lamp units has the reflector, the first light source, and the second light source,
The vehicle headlamp according to claim 1, wherein the light guides in the lamp units adjacent to each other are connected to each other. The vehicle headlamp according to claim 2, wherein a periphery of the first light source is surrounded by the light guide. 5. The vehicular headlamp according to claim 1, wherein a light blocking member is formed on a front side surface of a portion of the light guide positioned in front of the first light source. light. 6. The vehicular headlamp according to claim 5, wherein a surface on the rear side of the light shielding member is a sub-reflection surface that reflects at least the second light toward the reflection surface. The vehicle headlamp according to claim 6, wherein a part of the light from the first light source is reflected by the sub-reflection surface toward the reflection surface. The vehicular headlamp according to any one of claims 1 to 7, wherein the second light source is provided on each of an upper side and a lower side of the reflecting surface.

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