JP6814578B2 - Vehicle headlights - Google Patents

Description

The present invention relates to a vehicle headlight, and more specifically, to a vehicle headlight capable of suppressing an increase in size while adjusting the light distribution of a high beam, a daytime running lamp, or the like.

Vehicle headlights, such as automobile headlights, include a low beam light source for illuminating the front at night, a high beam light source for illuminating farther than the low beam, and the presence of a vehicle in the daytime. Those equipped with a daytime running lamp (DRL) or the like for indicating are known. The light from the high beam and the daytime running lamp includes the light emitted above the low beam. Therefore, the high beam illuminates a distance more than the low beam as described above, and the light from the daytime running lamp can be visually recognized from a position higher than the low beam.

The following Patent Document 1 describes a vehicle headlight having a low beam and a daytime running lamp. The vehicle headlight disclosed in Patent Document 1 is provided with a light source unit for nighttime lighting such as a low beam and a light source unit for daytime running lamp, that is, for daytime lighting, in one lighting chamber. There is.

Japanese Unexamined Patent Publication No. 2014-165150

In the vehicle lighting equipment of Patent Document 1, since the light source unit for night lighting and the light source unit for daytime lighting are provided in the lighting chamber as described above, the light emitted from each unit can be controlled for each unit. , Vehicle lighting fixtures tend to be larger as a whole.

Therefore, an object of the present invention is to provide a vehicle headlight capable of suppressing an increase in size while adjusting the light distribution of light emitted above the low beam.

In order to achieve the above object, the vehicle headlight of the present invention includes a first light source that emits light that becomes a low beam, and a second light source that emits light that becomes light that is emitted above the low beam. The first incident surface on which the light emitted from the first light source is incident, the concave internal reflecting surface that internally reflects the light incident from the first incident surface, and the emission that the light internally reflected by the internal reflecting surface is emitted. A light guide member having a surface is provided, and the outer surface of the internal reflection surface in the light guide member is a second incident surface on which light emitted from the second light source is incident, and is incident from the second incident surface. The light is characterized in that it is emitted from the emitting surface.

According to such a vehicle headlight, the light distribution of the low beam is adjusted by having a concave internal reflecting surface that reflects the first light emitted from the first light source and incident from the first incident surface. be able to. Further, the outer surface of the concave internal reflection surface becomes convex, and the convex outer surface is used as the second incident surface on which the second light emitted from the two light sources is incident, so that the light is irradiated above the low beam. The light distribution of the light to be made can be adjusted. In this way, the region of the internal reflection surface that adjusts the first light from the first light source by internal reflection and the region of the second incident surface that adjusts by refracting the second light from the second light source are By overlapping, the headlight for a vehicle is compared with the case where a part for adjusting the light path of the first light from the first light source and a part for adjusting the light path of the second light from the second light source are individually provided. Can be miniaturized. The second light emitted from the second light source is, for example, light for high beam or daytime illumination that is emitted from the exit surface of the light guide member and illuminates above the low beam. Part of this light may overlap with the low beam.

Further, it is preferable that the divergence angle of the second light emitted from the second light source is reduced on the second incident surface.

By adjusting the second light from the second light source in this way, the range of the light emitted above the low beam can be appropriately adjusted.

Further, it is preferable that the second light source switches between the second light that serves as a high beam and the second light that serves as daytime illumination.

In this case, the second light source can serve as both a high beam light source and a daytime lighting light source. In general, the total luminous flux amount of the second light emitted from the second light source is larger in the state of being used as the light source for high beam than in the state of being used as the light source for daytime lighting.

Further, among the first light emitted from the first light source, a shielding member that shields at least a part of light other than the light incident on the light guide member from the first incident surface and reflected by the internal reflection surface. It is preferable to be provided.

By providing such a shielding member, it is possible to suppress the emission of the first light, which is an unintended light distribution in which the optical path is not adjusted by the internal reflection surface, to the outside.

In this case, the shielding member is preferably provided between the first light source and the first incident surface.

By providing the shielding member in this way, the optical unit including the first light source, the light guide member, and the shielding member is made smaller than the case where the shielding member is provided outside between the first light source and the first incident surface. This allows the vehicle headlights to be made smaller.

Further, in this case, it is preferable that the shielding member is provided on a part of the region of the first incident surface.

By configuring the shielding member in this way, the shielding member can be formed in a film shape, and the structure can be simplified as compared with the case where the self-supporting shielding member is provided.

Further, the shielding member is a reflecting member that reflects the first light from the first light source, and at least a part of the first light reflected by the reflecting member is incident on the light guide member and is inside the inside. It is preferable that the light is reflected by the reflecting surface and emitted from the emitting surface.

By reflecting the first light incident on the shielding member and emitting it from the emitting surface, the first light emitted from the first light source can be efficiently used.

In this case, it is preferable that at least a part of the first light reflected by the reflecting member is incident on the light guide member from the first incident surface.

Since the first incident surface is the surface on which the first light from the first light source is incident, the position of the first light source and the reflective member is obtained by making the first light incident by the reflecting member incident from this incident surface. Depending on the relationship, it is possible to control the light distribution of the light reflected by the internal reflecting surface and emitted from the emitting surface. Therefore, the light distribution of the first light reflected by the reflecting member can be easily adjusted.

Further, at least a part of the first light that is reflected by the reflecting member, enters the light guide member, and is reflected by the internal reflecting surface is irradiated above the low beam after being emitted from the emitting surface. Is preferable.

Normally, the upper end of the light distribution pattern of the low beam is a cut line, and irradiating above the low beam means irradiating above this cut line. By making the light reflected by the reflecting member have such a light distribution, it is possible to emit light for visually recognizing the sign while the low beam is being irradiated at night. Part of this light may overlap with the low beam.

As described above, according to the present invention, it is possible to provide a vehicle headlight that can realize miniaturization while adjusting the light distribution of the light emitted above the low beam.

It is a front view which shows the outline of the vehicle which includes the headlight for a vehicle in 1st Embodiment of this invention. It is sectional drawing in line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is a figure which shows the light distribution. It is sectional drawing which shows the outline of the headlight for a vehicle in 2nd Embodiment of this invention from the same viewpoint as FIG. It is sectional drawing which shows the outline of the headlight for a vehicle in 3rd Embodiment of this invention from the same viewpoint as FIG.

Hereinafter, a mode for carrying out the vehicle headlight according to the present invention will be illustrated together with the attached drawings. The embodiments illustrated below are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. The present invention can be modified or improved from the following embodiments without departing from the spirit of the present invention.

(First Embodiment)
First, the configuration of the lamp of the present embodiment will be described.

FIG. 1 is a front view showing an outline of a vehicle provided with a vehicle headlight according to the present embodiment. As shown in FIG. 1, the vehicle 100 includes a pair of vehicle headlights 1 in each of the front left and right directions. The pair of vehicle headlights 1 provided in the vehicle 100 have a shape symmetrical to each other in the left-right direction. In the vehicle headlight 1 of the present embodiment, a plurality of lighting fixtures 1a, 1b, and 1c are arranged side by side with each other, the lighting fixture 1a is arranged on the outermost side of the vehicle 100, and the lighting fixture 1c is on the most central side of the vehicle 100. The lamp 1b is arranged between the lamp 1a and the lamp 1c. The lamps 1a, 1b, and 1c may have the same configuration as each other, or may have different configurations from each other.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. As shown in FIGS. 2 and 3, the lamp 1a, which is a part of the vehicle headlight 1, includes a housing 10 and a lighting unit LU housed in the housing 10.

<Case 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 has an opening, and the front cover 12 is fixed to the lamp housing 11 so as to close the opening. Further, an opening smaller than the front is formed behind the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.

The 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 the lamp chamber LR. The lamp unit LU is housed inside.

<Lamp unit LU>
The lamp unit LU includes a support member 30, a first light source 41, a second light source 42, a light guide member 50, and a reflection member 60 as main components.

The support member 30 is a metal member and has a top plate 31, a back plate 32, and a locking portion 33. The top plate 31 is a plate-shaped metal member extending substantially horizontally, and the back plate 32 is a plate-shaped 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 the locking portion 33 is fixed to the lamp housing 11. Further, 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 to fix the back plate 32 to the lamp housing 11. In this way, the back plate 32 is fixed in the light room LR in a substantially vertical state, and the top plate 31 connected to the back plate 32 is also fixed in the light room LR. By adjusting these screws 22 and 23, the angle of the back plate 32 can be finely adjusted, and the angle of the top plate 31 can be finely adjusted accordingly.

A first light source 41 that emits first light is arranged on the lower surface of the top plate 31. The first light source 41 is, for example, an LED (Light Emitting Diode). The first light source 41 is connected to a circuit board (not shown), and can emit the first light by supplying power from the circuit board.

A second light source 42 is arranged on the front surface of the back plate 32. In the present embodiment, the second light source 42 has two emission regions for emitting light, one emission region is a high beam emission region and the other emission region is daytime illumination as described later. It is used as an emission area for light sources. However, for example, the emission region for the high beam may be configured to include the emission region for daytime lighting. Further, the second light source 42 is connected to a circuit board (not shown) in the same manner as the first light source 41, and the second light can be emitted by feeding power from the circuit board. Further, a reflector 45 is arranged at a position surrounding the second light source 42 of the back plate 32. The reflector 45 has a shape that spreads radially toward the front, and can reflect the second light emitted from the second light source 42 forward.

A light guide member 50 is arranged on the lower surface of the top plate 31 so as to surround the first light source 41. The light guide member 50 is hollowed out in a dome shape so that the top surface 55 surrounds the first light source 41, and the dome-shaped surface surrounding the first light source 41 emits first light L from the first light source 41. The first incident surface 51 on which ₁ is incident is used.

The back surface of the light guide member 50 in the light guide member 50 has a concave shape, and reflects the _first light L ₁ emitted from the first light source 41 and incident on the light guide member 50 from the first incident surface 51 forward. It is formed to do. Therefore, the back surface of the light guide member 50 in the light guide member 50 is an internal reflection surface 52. The internal reflecting surface 52 is preferably a first light L ₁ to total internal reflection. The internal reflecting surface 52 has a concave shape formed of a free curved surface based on a parabola that opens toward the front side. More specifically, the shape of the internal reflection surface 52 in the vertical cross section is a shape below the apex when the central axis of the parabola is horizontal. Further, as shown in FIG. 3, the shape of the internal reflection surface 52 in the horizontal cross section is a shape including the apex of the parabola. However, the parabola in the vertical cross section of the internal reflection surface 52 and the parabola in the horizontal cross section may be different from each other. The shape of the internal reflection surface 52 in the horizontal cross section does not have to be a shape based on a parabola, and may be, for example, a shape based on a part of an ellipse or another concave shape. ..

Further, the region of the light guide member 50 as the internal reflection surface 52 is positioned so as to overlap with the second light source 42 when the light guide member 50 is viewed from the front cover 12 side. Therefore, the second light L ₂ emitted from the second light source 42 is incident on the light guide member 50 from a region overlapping the internal reflection surface 52 of the light guide member 50. Therefore, the outer surface of the internal reflection surface 52 of the light guide member 50 is a second incident surface 53 on which the second light L ₂ emitted from the second light source 42 is directly reflected or reflected by the reflector 45. The second incident surface 53 has a convex shape because the internal reflecting surface 52 has a concave shape. Since the second incident surface 53 is convex, when the second light L ₂ emitted from the second light source 42 is incident on the light guide member 50 from the second incident surface 53, it is refracted so that the divergence angle is reduced. To do.

Further, in the present embodiment, the front surface of the light guide member 50 has a convex shape. The front is the first of the second emission surface 54 that emits light L ₂ incident from the light L ₁ and the second incident surface 53 to the light guide member 50 which is reflected by the inner reflective surface 52.

The light guide member 50 is not particularly limited as long as it is a member that transmits light, but is made of a resin such as acrylic or polycarbonate, glass, or the like. The light guide member 50, be made of silica glass dopant to increase the refractive index, for example germanium or the like from the viewpoint of the first light L ₁ at internal reflection surface 52 is a reflecting easily such a high refractive index is added It is preferable that it is made of resin from the viewpoint of weight reduction.

In the present embodiment, a reflecting member 60 that reflects a part of the first light is provided on the front side of the first incident surface 51 of the light guide member 50. The reflecting member 60, when the reflecting member 60 is not provided, the first of the light L ₁ emitted from the first light source 41, incident on the light guide member 50 from the first incident surface 51 as described above Therefore, it is provided at a position that shields at least a part of light other than the light reflected by the internal reflecting surface 52. Therefore, the reflective member 60 can also be understood as a shielding member that shields a part of the first light. In this embodiment, the reflection member 60 that also serves as a shielding member is provided on a part of the region of the first incident surface 51 among the first light source 41 and the first incident surface 51, and the first It is formed in front of the exit portion of the light source 41. In this case, the reflecting member 60 shields and reflects the light propagating directly from the first incident surface 51 toward the emitting surface 54 when the reflecting member 60 is not provided.

Here, when the first light reflected by the reflecting member 60 of the light L ₁ emitted from the first light source 41 and reflected light L _1R, in the present embodiment, the reflected light L _1R, after reflected by the reflecting member 60 It enters the light guide member 50 from the first incident surface 51 and is reflected by the internal reflecting surface 52.

Examples of the reflective member 60 include a reflective film formed by providing a laminate of a metal such as aluminum or a metal oxide on the first incident surface 51, and a member in which a separately produced reflector is arranged on the first incident surface 51. be able to.

Incidentally, the reflecting member 60 also serving as a shielding member, as described above, in the first of the light L _1, the internal reflection surface 52 is incident from the first incident surface 51 directly from the first light source 41 to the light guide member 50 Any light other than the reflected light may be shielded and reflected. Therefore, the reflecting member 60 does not have to reflect all the light, and may be, for example, a half mirror.

Next, the operation of the vehicle headlight 1 will be described using the lamp 1a. FIG. 4 is a diagram showing a light distribution, FIG. 4 (A) shows a low beam light distribution, FIG. 4 (B) shows a high beam light distribution, and FIG. 4 (C) shows a daytime illumination light distribution. Shown.

<When the low beam is lit>
The low beam is irradiated by the light from the first light source 41. Figure 2, as shown in FIG. 3, the number of the first light L ₁ emitted from the first light source 41, directly from the first light source 41 propagates to the first incident surface 51, light from the first incident surface 51 It is incident on the member 50. The first light L ₁ propagates in the light guide member 50 and is internally reflected by the internal reflection surface 52. The first light L ₁ is preferably totally reflected by the internal reflection surface 52. The first light L ₁ reflected internally by the light propagates forward in the light guide member 50 and is emitted from the exit surface 54. In operation of irradiating the low beam, first of the light L _1, light emitted from the most anterior region in the exit portion of the first light source 41 is, as shown in FIG. 4 (A), the low beam cut line Form. Further, the light emitted from the same region in the emitting portion of the first light source 41 is regarded as parallel light after the internal reflection regardless of which part of the internal reflection surface 52 is internally reflected.

Also, FIG. 2, as shown in FIG. 3, the first part of the light of the light L ₁ emitted from the first light source 41 is propagated to the reflecting member 60, it is reflected by the reflecting member 60. The reflected light is incident on the light guide member 50 from the first incident surface 51 as the reflected light L _1R . The reflected light L _1R propagates in the light guide member 50 and is internally reflected by the internal reflection surface 52. It is preferable that the reflected light L _1R is totally reflected by the internal reflection surface 52. The internally reflected reflected light L _1R propagates forward in the light guide member 50 and is emitted from the exit surface 54. At this time, at least a part of the reflected light _L1R is directly incident on the first incident surface 51 from the first light source 41 after being emitted from the emitted surface 54, reflected by the internal reflecting surface 52, and emitted from the emitted surface 54. It is illuminated above the light. That is, at least a part of the reflected light L _1R is irradiated above the cut line of the low beam after being emitted from the emission surface 54. This light is considered to be light having a weaker intensity than the low beam, that is, light having a small luminous flux per unit area of the irradiated surface, and is light for viewing a sign when the low beam is lit (OHS: light for Over Head Sign). ). In order to form such a light distribution, the reflecting member 60 may be formed, for example, in front of the emitting portion of the first light source 41 as described above. In addition, in FIG. 4A, the reflected light L _1R irradiated above the cut line is not shown in order to avoid complication.

<When the high beam is lit>
In the present embodiment, when the high beam lights, in addition to the operation at the time of the low beam lights to emit light L ₂ from the exit area of the second high beam of the second light source 42. As shown in FIGS. 2 and 3, the second light L ₂ emitted from the second light source 42 is reflected directly or by the reflector 45 and is incident on the light guide member 50 from the second incident surface 53. At this time, the second light L ₂ is refracted on the second incident surface 53 so that the divergence angle of the second light L ₂ becomes smaller. The second light L ₂ incident from the second incident surface 53 propagates through the light guide member 50 and is emitted from the exit surface 54. At least a part of the second light L ₂ is irradiated above the low beam cut line after being emitted from the exit surface 54. In this way, the high beam light distribution shown in FIG. 4 (B) is formed. In the above description, when the high beam is lit, the light is emitted from the first light source 41 and the second light source 42, but when the high beam is lit, the light is emitted from only the second light source 42 and the arrangement shown in FIG. 4B is shown. Light may be formed.

<When the daytime lighting is on>
In the present embodiment, at the time of the daytime lighting lighting, without emitting light from the first light source 41, it is emitted from the emission region of the daytime illumination of the second light L ₂ of the second light source 42. However, when the daytime lighting is lit, the second light source 42 is dimmed as compared with when the high beam is lit. That is, the second light source 42 emits the second light L ₂ having a smaller total luminous flux than when the high beam is lit. Thus, in the present embodiment, the second light source 42 emits by switching the total luminous flux number together a second light L ₂ serving as the second light L ₂ and the light of day lighting as a high beam structure It is said that. The second light L ₂ emitted from the second light source 42 when the DRL is lit propagates in substantially the same manner as when the high beam is lit, and is emitted from the exit surface 54. In this way, as shown in FIG. 4C, the light distribution during daytime illumination is formed.

As described above, according to the vehicle headlamp 1 including lamp 1a of the present embodiment, the inner reflective surface 52 such as by adjusting the first optical path of the light L _1, to adjust the light distribution of the low beam be able to. Further, the convex second incident surface 53 and the like can adjust the light distribution of the high beam and the daytime illumination light emitted above the low beam. In this way, the region of the internal reflection surface 52 that adjusts the first light L ₁ from the first light source 41 by internal reflection and the second light L ₂ that is adjusted by refracting the second light L ₂ from the second light source 42. By overlapping the regions of the incident surface 53 with each other, the vehicle headlight can be miniaturized as compared with the case where the regions are individually provided.

Further, since the divergence angle of the second light L ₂ emitted from the second light source 42 is reduced on the second incident surface 53, the range of the light emitted above the low beam can be appropriately adjusted. ..

Further, as in the present embodiment, the second light source 42 switches between the light that becomes the high beam and the light that becomes the daytime illumination and emits the light to emit the light that becomes the high beam and the light that becomes the daytime illumination. It is not necessary to separately provide a light source to emit light, and the vehicle headlight 1 can be further miniaturized.

Further, in the present embodiment, since the reflection member 60 also serving as a shielding member is provided on a part of the region of the first incident surface 51, when the reflection member 60 is not provided, the reflection is reflected by the internal reflection surface 52. It is possible to block light that is unintentionally distributed and prevent the light from being emitted to the outside. Moreover, in the present embodiment, since the reflected light L _1R reflected by the reflecting member 60 is reflected by the internal reflecting surface 52 and emitted from the emitting surface 54, the first light L ₁ emitted from the first light source 41 is efficiently used. Can be used for.

(Second Embodiment)
Next, the second embodiment of the present invention will be described in detail with reference to FIG. The same or equivalent components as those in the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 5 is a cross-sectional view showing an outline of the vehicle headlight in the present embodiment from the same viewpoint as in FIG. In the vehicle headlight of the present embodiment, the lamp 2a is used instead of the lamp 1a of the first embodiment. The lamp 2a differs from the lamp 1a of the first embodiment in that a reflection member 61 is provided in place of the reflection member 60 in the first embodiment, and the reflection member 61 is provided on the exit surface 54 of the light guide member 50. Reflecting member 61 of this embodiment, the first of the light L ₁ which is incident from the first incident surface 51 is emitted from the first light source 41 to the light guide member 50, an internal reflection in the case of that there is no reflection member 61 Reflects light that is not reflected by the surface 52. The reflective member 61 includes, for example, a reflective film formed by providing a laminate of a metal such as aluminum or a metal oxide on the first incident surface 51, or a separately produced reflector arranged on the first incident surface 51. Can be mentioned.

In the lamp 2a of the present embodiment, when light is emitted from the first light source 41 when the low beam is lit or the high beam is lit, a part of the light incident on the light guide member 50 from the first incident surface 51 is reflected by the reflecting member 61. To. The reflected light L _1R reflected by the reflecting member 61 propagates backward through the light guide member 50 and is reflected by the internal reflecting surface 52. Then, the reflected light L _1R reflected by the internal reflecting surface 52 is emitted from the emitting surface 54 and is irradiated above the low beam cut line in the same manner as the reflected light L _1R in the first embodiment.

In the lamp 2a of the present embodiment, even when it is difficult to arrange a reflective member that also serves as a shielding member between the first light source 41 and the first incident surface 51, the reflective member 61 that also serves as a shielding member is arranged. doing, it is possible to light the unintended light distribution can be suppressed to emit, further utilizing the reflected light L _1R first light L ₁ emitted from the first light source 41 efficiently ..

(Third Embodiment)
Next, the third embodiment of the present invention will be described in detail with reference to FIG. The same or equivalent components as those in the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 6 is a cross-sectional view showing an outline of the vehicle headlight in the present embodiment from the same viewpoint as in FIG. In the vehicle headlight of the present embodiment, the lamp 3a is used instead of the lamp 1a of the first embodiment. The lamp 3a is different from the lamp 1a of the first embodiment in that a second light source that emits light for high beam and a second light source that emits light for daytime illumination are separately provided.

The second light source 42 of this embodiment is the second light L ₂ for high beam is emitted, in that it does not emit the second light L ₂ daytime lighting, different from the second light source of the first embodiment. Further, the lamp 3a has a light pipe 72, and the light pipe 72 serves as a second light source for daytime lighting. Therefore, the light pipe 72 emits a _second light L 2'for daytime lighting.

Further, the lamp 3a is a plate-shaped member and has a bezel 34 extending substantially horizontally. In the present embodiment, the bezel 34 is integrated with the support member 30 and extends from the lower side to the front side of the back plate 32. The bezel 34 has an opening 35 formed in a region connecting the light pipe 72 and the second incident surface 53. Therefore, the second light L ₂ emitted from the light pipe 72 _'may be propagated from the opening 35 to the second incident surface 53.

Further, in the present embodiment, a plate-shaped second light guide member 73 that is arranged in front of the light pipe 72 and extends forward is provided. The second light guide member 73 and partially enters the second light L _{2 'emitted} from the light pipe 72, the second light guide member 73 is the from the end surface opposite to the light pipe side second optical Emit L _2' .

Further, an inner lens 74 is provided in front of the second light guide member 73. The inner lens 74 has a shape that at least covers the front end surface of the second light guide member 73. Therefore, incident from the light pipe 72 to the second light guide member 73, the second light L _{2 'is} emitted from the end surface of the front of the second light guide member 73, is refracted by the inner lens 74, the inner lens 74 Emit from.

Lamp 3a having such a configuration, when the low beam irradiation, to the first light source in the same manner as in the first embodiment emits the first light L _1. Also, during the high beam irradiation, it emits a second light L ₂ from the second light source in the same manner as in the first embodiment.

Further, when the daytime illumination is applied, light is emitted from the light pipe 72. Emitted from the light pipe 72 is a part of the second light L _{2 ',} propagating from the opening 35 to the second incident surface 53 of the light guide member 50, enters the light guide member 50 while being refracted by the second incident surface 53 To do. At this time, the second light L _{2 'is} refracted so that the divergence angle becomes small. A part of the _second light L 2'incident on the light guide member 50 is internally reflected by the exit surface 54. The second light L _{2 'is} preferably totally reflected by the exit surface 54. Second light L _{2 'which} is internally reflected by the exit surface 54 is reflected by the top surface 55 of the light guide member 50. Therefore, in the present embodiment, it is preferable that the top plate 31 in contact with the top surface 55 of the light guide member 50 is mirror-finished. The second other part of the light L _{2 'which} has entered the light guide member 50 is internally reflected by the first incidence surface 51. The second light L _{2 'is} preferably totally reflected by the first incidence surface 51. The second further other part of the light L _{2 'which} has entered the light guide member 50 is reflected by the top surface 55 of the light guide member 50 without being reflected by the exit surface 54. At least a portion of the first reflected by the top surface 55 or the like of the light guide member 50 in these optical path 2 of the light L _{2 'is} internally reflected by the inner reflective surface 52. At this time, the second light L _{2 'is} preferably totally reflected by the internal reflection surface 52. Then, the second light L ₂ which is internally reflected by the inner reflective surface 52 _'is emitted from the emission surface 54.

The second other part of the light L _{2 'emitted} from the light pipe 72 is incident on the second light guide member 73, exits from the end surface of the front of the second light guide member 73. Second light L _{2 'is} emitted from the end surface of the front of the second light guide member 73, it is refracted by the inner lens 74, emitted from the inner lens 74.

Thus, _'the second light L ₂ emitted from the inner lens _74' second light L ₂ emitted from the emitting surface 54 of the light guide member 50 exits the light distribution of shown in FIG. 4 (C) is formed To.

In this embodiment, the a light pipe 72 is a second light source for emitting a second light L _{2 'of} the illumination during the day and a second light source 42 for emitting a second light L ₂ for high beam and separately .. Therefore, it is possible to easily form the light distribution of the high beam and the light distribution of the daytime illumination individually.

Although the present invention has been described above by exemplifying the first to third embodiments, the present invention is not limited thereto.

For example, in the above embodiment, the vehicle headlight 1 is configured such that a plurality of lighting fixtures 1a to 1c are connected. However, the vehicle headlight of the present invention may consist of one lamp. Further, even when a plurality of lamps are connected to the vehicle headlights of the present invention, the direction in which the lamps are connected and the number of lamps are not particularly limited.

Further, in the first and second embodiments, one of the lamp 1a, the 2a, the second light L ₂ to the second light source 42 becomes the second light L ₂ and the light of day lighting as a high beam The total number of light beams was switched and emitted. However, the present invention is not limited to this, for example, as in the third embodiment, one of the second light L ₂ to the second light source 42 becomes the second light L ₂ and the light of day lighting as a high beam It may be configured to emit only light. In this case, for example, in the vehicle headlamp 1, when the high beam, the second light source 42 of each of the plurality of lamp 1a~1c second light L ₂ emitted, when the irradiation of the daytime lighting, a plurality of The second light source 42 may emit the second light L ₂ from only one of the lamps 1a to 1c.

In the above embodiment, the second light L ₂ and the second light L _{2 'emitted} from the second light source has been assumed to be refracted such that the divergence angle in the second incidence plane 53 becomes smaller, This configuration is not essential. However, _'in view of adjusting the optical path of the better, the second light L ₂ and the second light L _2' second light L ₂ and the second light L ₂ diverge at a second incident surface 53 It is preferable to refract so that the angle becomes small.

Further, in the above embodiment, at least a part of the reflected light L _1R reflected by the reflecting members 60 and 61 is light that irradiates above the low beam after being emitted from the emitting surface 54. However, the reflected light L _1R may be emitted only below the low beam cut line after being emitted from the exit surface 54.

Further, in the above embodiment, the reflective members 60 and 61 are provided, but the reflective members 60 and 61 are not essential. Further, these reflecting members 60 and 61 may be merely shielding members that do not reflect light. However, from the viewpoint of effectively utilizing the light propagating at the positions where the reflecting members 60 and 61 are provided, it is preferable not only to shield the light but also to reflect the light. Further, regardless of whether the reflecting members 60 and 61 reflect light or are used as a shielding member as described above, these members are placed on the light guide member 50 as in the above embodiment. A self-supporting reflective member or shielding member may be provided at a distance from the light guide member. For example, in the case of the first embodiment, a self-supporting reflective member or a shielding member may be provided at a position between the first light source 41 and the first incident surface 51 at a position separated from the first incident surface 51, and the second embodiment may be provided. In the case of the form, a self-supporting reflective member or a shielding member may be provided at a position separated from the exit surface 54. In these cases, the self-supporting reflective member or shielding member may be configured to be fixed to the top plate 31.

Further, in the above embodiment, the exit surface 54 of the light guide member 50 has a convex shape, but the present invention is not limited to this, and may be, for example, a flat shape.

In the third embodiment, the second light guide member 73 in front of the light pipe 72, and inner lens 74 is arranged, in which a part of the second light L _{2 'emitted} from the light pipe 72 is emitted It was said. However, even in the case of the third embodiment, in the present invention, the second light guide member 73 and the inner lens 74 are not arranged, and the light guide member 50 is used for daytime lighting from a member other than the exit surface 54. The light may not be emitted.

In the third embodiment, using the light pipe 72 as a second light source for emitting the second light L _{2 'daytime} lighting. However, if the second light source member 73 and the inner lens 74 are not arranged as described above, the second light L ₂ is directed from the opening 35 toward the second incident surface 53 without using the light pipe 72. _'may be used a light source such as an LED that emits.

Further, in the above embodiment, each of the lamps 1a, 1b, and 1c is provided with a housing 10, and each of the lamp chambers LR of the lamps 1a, 1b, and 1c is partitioned by the housing 10, but in the present invention, The wall of the housing 10 is not formed between the respective lamps 1a and 1b, and between the lamps 1b and 1c, and the respective lamp chambers LR may be spatially connected.

According to the present invention, a lamp that can be miniaturized while adjusting the light distribution of daytime lighting is provided, and can be used in the field of lighting and the like.

1 ... Vehicle headlights 1a to 1c, 2a, 3a ... Lamp 10 ... Housing LU ... Lamp unit 30 ... Support member 31 ... Top plate 32 ... Back plate 41 ... 1st light source 42 ... 2nd light source 50 ... Light guide member 51 ... 1st incident surface 52 ... Internal reflection surface 53 ... 2nd incident surface 54 ... Exit surface 60, 61 ... Reflective member 72 ... Light pipe (second light source)
73 ... Second light guide member 74 ... Inner lens L ₁ ... First light L _1R ... Reflected light L ₂ , L _2' ... Second light

Claims (8)

A first light source that emits a first light that becomes a low beam,
A second light source that emits a second light, which is the light emitted above the low beam,
A first incident surface on which the first light emitted from the first light source is incident, a concave internal reflecting surface that internally reflects the first light incident from the first incident surface, and internal reflection on the internal reflecting surface. A light guide member having an exit surface from which the first light is emitted, and
With
The outer surface of the internal reflection surface of the light guide member is a second incident surface on which the second light emitted from the second light source is incident.
The second light incident from the second incident surface is emitted from the exit surface and is emitted from the exit surface .
A shielding member is provided that shields at least a part of the first light emitted from the first light source other than the light incident on the light guide member from the first incident surface and reflected by the internal reflecting surface. <br/> A vehicle headlight that is characterized by this. The vehicle headlight according to claim 1, wherein the second light emitted from the second light source has a small divergence angle on the second incident surface. The vehicle headlight according to claim 1 or 2, wherein the second light source switches and emits a second light serving as a high beam and a second light serving as daytime lighting. The vehicle headlight according to any one of claims 1 to 3, wherein the shielding member is provided between the first light source and the first incident surface. The vehicle headlight according to claim 4 , wherein the shielding member is provided on a part of a region of the first incident surface. The shielding member is a reflective member that reflects the first light from the first light source.
Any of claims 1 to 5 , wherein at least a part of the first light reflected by the reflecting member is incident on the light guide member, reflected by the internal reflecting surface, and emitted from the emitting surface. The vehicle headlight described in item 1. The vehicle headlight according to claim 6 , wherein at least a part of the first light reflected by the reflecting member is incident on the light guide member from the first incident surface. At least a part of the first light that is reflected by the reflecting member, is incident on the light guide member, and is reflected by the internal reflecting surface is irradiated above the low beam after being emitted from the emitting surface. The vehicle headlight according to claim 6 or 7 .

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