JP6792388B2 - Vehicle headlights - Google Patents

Description

The present invention relates to a vehicle headlight, and more specifically, to a vehicle headlight capable of emitting light having a different light distribution while suppressing an increase in a light emitting area.

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.

For example, in the vehicle lighting equipment disclosed in Patent Document 1 below, an extension portion as a light guide member that does not form a lens is connected to the outside from the edge of the projection lens, and the light from the daytime running lamp is emitted to the extension portion. It is incident and part of this light is emitted through the projection lens.

Japanese Unexamined Patent Publication No. 2014-60102

In the vehicle lighting equipment of Patent Document 1, in addition to the low beam, a part of the light from the daytime running lamp can be emitted through the projection lens, and the light distribution of the daytime running lamp can be adjusted. .. However, since the extending portion extends to the outside of the projection lens, there is a concern that the light emitting area will increase and the lamp will become larger.

Therefore, an object of the present invention is to provide a vehicle headlight capable of emitting light having a different light distribution while suppressing an increase in a light emitting area.

In order to solve the above problems, the vehicle headlight of the present invention has a reflector in which a half mirror is formed on at least a part of the front surface of the light guide member, and the light distribution is controlled and reflected forward by the half mirror. The light guide member includes a first light source that emits a first light and a second light source that emits a second light that is transmitted forward through the half mirror and is emitted forward. The light guide member comprises the second light. It is characterized by controlling the light distribution of.

In the vehicle headlight, the first light is reflected by the half mirror and the second light is transmitted through the half mirror, so that different light distributions can be emitted from the same light emitting surface. Therefore, it is possible to emit light having a different light distribution while suppressing an increase in the light emitting area. Further, the light distribution of the first light and the light distribution of the second light can be adjusted by the shapes of the half mirror and the light guide member.

In the present invention, the "half mirror" is not limited to the one that reflects exactly half of the incident light, but reflects some of the incident light and the other part of the light. Means a metal film that permeates.

Further, the light guide member may have a non-reflective portion in which the half mirror is not formed on the front surface, and a part of the second light may be emitted from the non-reflective portion.

By forming such a non-reflective portion, the second light can be easily irradiated forward, and the utilization efficiency of the second light can be improved.

Further, it is preferable that the first convex lens portion for diffusing the second light is formed in the non-reflective portion.

By forming such a first convex lens portion, it is possible to irradiate a second light over a wide range. Therefore, for example, the second light can be easily used as the light of the daytime running lamp.

Further, the second light source may be arranged above the light guide member, and the light guide member may have an internal reflection surface on the back surface that internally reflects the second light incident from the upper surface.

By arranging the second light source above the light guide member and forming an internal reflection surface on the back surface of the light guide member in this way, the size of the vehicle headlight in the front-rear direction is reduced, and the second light source is second. The light of 2 can be emitted forward.

Further, when the second light source is arranged above the light guide member and an internal reflection surface is formed on the back surface of the light guide member as described above, the light source is incident on the upper surface of the light guide member. It is preferable to form a second convex lens portion that reduces the divergence angle of the second light.

By making the divergence angle of the second light smaller and incident on the light guide member in this way, it becomes easier to guide the second light from the upper surface to the lower surface of the light guide member, and the second light is spread over a wide range of the internal reflection surface. It is possible to make the second light incident, and it becomes easier to irradiate the second light over a wide range.

Further, it is preferable that the internal reflection surface is curved so as to bulge outward.

Since the internal reflecting surface is curved so as to bulge outward, it is possible to prevent the divergence angle of the second light after being reflected by the internal reflecting surface from becoming too large.

Further, it is preferable that the second light source is arranged behind the light guide member, and a third convex lens portion for controlling the light distribution of the second light is formed on the back surface of the light guide member.

By arranging the second light source and forming the third convex lens portion in this way, it is possible to prevent the divergence angle of the second light propagating through the light guide member from becoming too large.

Further, the light guide is a reflective member that reflects a part of the first light transmitted through the half mirror and incident on the light guide member above the first light reflected by the half mirror. It is preferably provided on the back surface of the member.

A part of the first light incident on the half mirror is reflected by the half mirror, but another part of the first light incident on the half mirror is transmitted through the half mirror. By reflecting a part of the first light transmitted through the half mirror upward in this way, a part of the first light not reflected forward by the half mirror can be effectively used as an overhead sign or the like. can do.

Further, the reflecting member that reflects a part of the first light that has passed through the half mirror and is incident on the light guide member above the first light that is reflected by the half mirror is the third. It is preferable that the lens is provided at least one of the upper part and the lower part of the convex lens portion.

The third convex lens portion is used to control the light distribution of the second light as described above. By providing the reflecting member on the upper portion or the lower portion of the third convex lens portion, it is possible to prevent the reflecting member from interfering with the control of the light distribution of the second light. Therefore, by providing the reflecting member on at least one of the upper part and the lower part of the third convex lens portion, the control of the light distribution of the second light is suppressed from being hindered, and the light is not reflected forward by the half mirror. A part of the light of 1 can be effectively used as an overhead sign or the like.

Further, a plurality of the third convex lens portions are formed, and a part of the first light transmitted through the half mirror and incident on the light guide member is reflected above the first light reflected by the half mirror. It is preferable that a reflective member that reflects light is provided between the third convex lens portions that are adjacent to each other.

By providing the reflecting member between the third convex lens portions adjacent to each other in this way, it is possible to prevent the reflecting portion from interfering with the control of the light distribution of the second light. Therefore, it is possible to effectively use a part of the first light that is not reflected forward by the half mirror as an overhead sign or the like while suppressing the control of the light distribution of the second light from being hindered.

As described above, according to the present invention, there is provided a vehicle headlight capable of emitting light having a different light distribution while suppressing an increase in a light emitting area.

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 an enlarged view of the headlight for a vehicle of FIG. It is sectional drawing in line III-III of FIG. It is a figure which shows the light distribution. It is sectional drawing which shows a part of the headlight for a vehicle in 2nd Embodiment of this invention from the same viewpoint as FIG. It is sectional drawing which shows a part of the headlight for a vehicle in 3rd Embodiment of this invention from the same viewpoint as FIG. It is sectional drawing which shows a part of the headlight for a vehicle in 4th 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 in each of the front left and right directions. That is, each vehicle headlight 1 is arranged outside the center of the vehicle 100 in the left-right direction. Further, the pair of vehicle headlights 1 provided in the vehicle 100 have a shape symmetrical to each other in the left-right direction. The vehicle headlight 1 of the present embodiment includes lamps 1a, 1b, and 1c, the lamp 1a is arranged on the outermost side of the vehicle 100, the lamp 1c is arranged on the outermost side of the vehicle 100, and the lamp 1b is the lamp. It is arranged between 1a and the lamp 1c.

FIG. 2 is an enlarged view of the vehicle headlight 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 lamp unit LUa, LUb, LUc includes a reflector 50, further, 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. Since the lamp units LUa, LUb, and LUc have substantially the same configuration as each other, the lamp unit 1a will be mainly described below as an example.

FIG. 3 is a cross-sectional view taken along the line III-III of FIG. Note that FIG. 2 is a conceptual diagram for easy understanding, and some of the members shown in FIG. 3 are omitted. As shown in FIG. 2, the lamp 1a, which is a part of the vehicle headlight 1, includes a housing 10, and the lamp unit LUa is housed 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 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 light room LR, and the light room LR. The lamp unit LUa is housed inside. As shown in FIG. 2, in the present embodiment, each of the lamps 1a, 1b, and 1c includes the housing 10, but between the respective lamps 1a and 1b and between the lamps 1b and 1c. The wall of the housing 10 is not formed, and the respective lamp chambers LR are spatially connected. However, a wall may be formed between the respective housings 10 of the lamps 1a, 1b, and 1c.

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

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 reflector 50 is fixed to the lower surface of the top plate 31. The reflector 50 has a light guide member 51 and a half mirror 52 provided on the front surface of the light guide member 51, and the surface of the half mirror 52 is a first reflection surface 52s. In this way, the first reflecting surface 52s is provided on the light guide member 51. Further, the surface of the light guide member 51 on the front side has a plurality of recesses 51a, and the first reflecting surface 52s has a shape that follows these recesses 51a. Further, each of these recesses 51a has a concave shape having a free curved surface based on a parabola that opens toward the front side. More specifically, the cross-sectional shape in the vertical direction of the portion of the first reflecting surface 52s that follows the respective recesses 51a is a shape below the apex of the parabola. Further, although not particularly shown, the horizontal cross-sectional shape of the portion of the first reflecting surface 52s that follows each recess 51a is a shape including the apex of the parabola. However, the parabola in the vertical cross section of the first reflecting surface 52s and the parabola in the horizontal cross section may be different from each other.

Further, in the present embodiment, the back surface of the light guide member 51 is an incident surface 53 on which the second light L ₂ emitted from the second light source 42a described later is incident. In the present embodiment, a third convex lens portion 54 for controlling the light distribution of the second light L ₂ emitted from the second light source 42a, which will be described later, is formed on the back surface of the light guide member 51, and the third convex lens The surface of the portion 54 is the incident surface 53.

Further, in the present embodiment, the reflector 50 has a reflection member 56 provided above and below the third convex lens portion 54 on the back surface of the light guide member 51. The reflecting member 56 can reflect the incident light on the surface on the light guide member 51 side. That is, the surface of the reflection member 56 on the light guide member 51 side becomes the second reflection surface 56s.

The material of the reflector 50 is not particularly limited as long as the light guide member 51 transmits light, the half mirror 52 is provided on at least a part of the front surface, and the reflection member 56 is provided on the back surface. For example, the light guide member 51 is made of a resin such as acrylic or polycarbonate, glass, or the like. When the refractive index is high, it is preferably made of silica glass to which a dopant for increasing the refractive index such as germanium is added, and when the weight is reduced, it is preferably made of resin. The half mirror 52 is not particularly limited as long as it is a member that reflects a part of the light incident on the first reflecting surface 52s and transmits the other part, and is formed by, for example, plating or vapor deposition of tin or silver. It is composed of a thin reflective film. By adjusting the thickness of the reflective film and the like, the ratio of the reflected light to the transmitted light in the light incident on the half mirror 52 can be adjusted. The surface of the half mirror 52 may be protected by a transparent resin or the like. Further, the reflective member 56 is not particularly limited as long as it is a member that reflects light on the second reflective surface 56s, and for example, a metal such as aluminum is formed on the surface of the light guide member 51 by vapor deposition or the like. Alternatively, the reflective member 56 may be a thin plate-shaped member that has been mirror-finished and is fixed on the light guide member 51.

The reflectors 50 provided in the respective lamps 1a, 1b, and 1c may be integrated or may be separate.

Further, on the lower surface of the top plate 31, the first light source 41a for emitting the first light L ₁ is disposed. A part of the first light L ₁ is reflected forward while the light distribution is controlled by the half mirror 52. In the present embodiment, a part of the first light L ₁ is light that becomes light for nighttime illumination such as low beam or high beam after being reflected by the half mirror 52. The first other part of the light L ₁ passes through the half mirror 52. Some of the light of the first light L ₁ which passes through the half mirror 52 is reflected on the reflecting member 56 light for labeling viewing: are (OHS Over Head light for Sign). Such a 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. Further, the light emitting surface of the first light source 41a is arranged on the focal point of a parabola based on the shape of the first reflecting surface 52s. Thus, a portion of the first light L ₁ emitted from the first light source 41a as described in detail later, mutually parallel after being reflected at a different site in the first reflecting surface 52s by propagating with a spread angle It is regarded as light.

Further, a second light source 42a that emits a _second light L ₂ is arranged on the front surface side of the back plate 32. The light distribution of the second light L ₂ is controlled by the light guide member 51. The second light source 42a, similarly to the first light source 41a, are connected to a circuit board (not shown), capable of emitting light L ₂ powered by the second from the circuit board. The second light source 42a is arranged so that the light emitting surface faces forward. Further, the second light source 42a is arranged behind the light guide member 51. Therefore, as shown in FIG. 3, the second light L ₂ emitted forward from the second light source 42a can be incident on the light guide member 51 from the incident surface 53. At this time, in the present embodiment, the light distribution of the second light L ₂ is controlled by the third convex lens portion 54 formed on the back surface of the light guide member 51. At least a part of the second light L ₂ incident on the light guide member 51 is light that passes through the half mirror 52 and is irradiated forward to be used as light for daytime illumination.

Further, since the lamps 1b and 1c, which are a part of the vehicle headlight 1, have substantially the same configuration as the lamp 1a, respectively, they will not be described with reference to a cross-sectional view. The lamp unit LUb has a first light source 41b similar to the first light source 41a and a second light source 42b similar to the second light source 42a instead of the first light source 41a. The lamp unit LUc has a first light source 41c similar to the first light source 41a and a second light source 42c similar to the second light source 42a instead of the first light source 41a. Although not particularly shown, the first light source 41b, 41c, as in the first light source 41a, the first light _{L 1} which is a low beam or high beam after reflection by the half mirror 52 is emitted, the second light source 42b, The 42c emits the second light L ₂ which becomes the light for daytime illumination after passing through the half mirror 52 in the same manner as the second light source 42a. That is, the lamps 1b and 1c emit the same light as the lamp 1a.

Next, the emission of light by the vehicle headlight 1 will be described. Since the lamps 1b and 1c have substantially the same configuration as the lamp 1a as described above, the lamp 1a will be mainly described.

<At night lighting>
During nighttime illumination, the first light L ₁ is emitted from the first light source 41a. Some of the first light _{L 1} emitted from the first light source 41a in the lamp 1a is reflected by the first reflecting surface 52s of the half mirror 52 and is emitted through the front cover 12. At this time, as described above, in the present embodiment, since the first light source 41a is located on the focal point of the parabola based on the shape of the first reflection surface 52s, the light is emitted from the same region in the exit portion of the first light source 41a. Even if the light propagates at different positions on the first reflecting surface 52s by propagating with a spreading angle, the reflected light is generally parallel to each other. In the present embodiment, the first light L ₁ reflected by the first reflecting surface 52s as described above is a low beam or a high beam.

When the first light L ₁ is a low beam, at the exit portion of the first light source 41a is at least a portion of the light distribution of the low beam is formed by lighting, the first of the first light source 41a of the light L ₁ The light emitted from the most anterior region forms the low beam cut line. By emitting the low beam from the lamps 1b and 1c in this way, the light distribution of the low beam shown in FIG. 4A 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, The high beam light distribution shown in FIG. 4 (B) is formed.

On the other hand, another part of the first light _{L 1} emitted from the first light source 41a in the lamp 1a is transmitted through the half mirror 52. Further, the light reaching the reflecting member 56 of the first light L ₁ which passes through the half mirror 52, the second reflecting surface 56s, is reflected upward than the first light L ₁ reflected by the half mirror 52 To. In the present embodiment, the first light L ₁ thus reflected upward by the reflecting member 56 is used as light for viewing the sign. In FIG. 4, 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, 1c, a part of the first light source may be a light source for a low beam, and some other first light sources may be a light source for a high beam. In this case, the low beam irradiation, the light distribution of the low beam first light L ₁ from the first light source part above is emitted is formed. Moreover, this at the time of irradiation of a high beam when, for example, the first light L ₁ from all of the first light source 41a~41c high beam light distribution is emitted is 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 upper light distribution is formed, mating the light distribution of the first light L ₁ from the first of the first light source of the light distribution and another part by the light L ₁ from the portion of the first light source, the high beam It is said to be the light distribution of. At this time, the second light sources 42a, 42b, 42c of the respective lamps 1a, 1b, 1c may be turned on or off. When the second light sources 42a, 42b, and 42c are turned on, the total number of luminous fluxes during high beam irradiation can be increased.

<During daytime lighting>
During daytime lighting, the first light sources 41a, 41b, 41c of the respective lamps 1a, 1b, 1c are turned off, and the second light sources 42a, 42b, 42c of the respective lamps 1a, 1b, 1c are turned on. The second light L ₂ emitted from the second light source 42a in the lamp 1a is incident on the light guide member 51 from the incident surface 53. At this time, in the third convex lens portion 54, the second light L ₂ is refracted so that the divergence angle of the second light L ₂ becomes smaller. At least a part of the second light L ₂ incident from the incident surface 53 propagates through the light guide member 51, passes through the half mirror 52, and is emitted. A part of the second light L ₂ that has passed through the half mirror 52 and further passed through the front cover 12 is also irradiated above the cut line of the low beam. The total luminous flux of the second light L ₂ transmitted through the half mirror 52 is smaller than the total luminous flux of the first light L ₁ reflected by the half mirror 52. That is, the second light L ₂ emitted from the lamp 1a is weaker than the first light L ₁ emitted from the lamp 1a. By emitting the second light L _{2 in} this way, at least a part of the light distribution of the daytime illumination is formed. Thus lamp 1b, from 1c by the second light L ₂ is emitted, the light distribution of daylight illumination shown in FIG. 4 (C) is formed.

As described above, in the vehicle headlight 1 of the present embodiment, each of the lighting fixture units LUa to LUc emits the first light L ₁ that is reflected forward while the light distribution is controlled by the half mirror 52. The first light sources 41a to 41c and the second light sources 42a to 42a to emit the second light L2 which is arranged behind the light guide member 51 and transmits the second light L ₂ which is transmitted through the half mirror 52 while the light distribution is controlled by the light guide member 51. 42c and. In this way, the first light L ₁ is reflected by the half mirror 52 and the second light L ₂ is transmitted through the half mirror 52, so that different light distributions can be emitted from the same light emitting surface. .. Therefore, it is possible to emit light having a different light distribution while suppressing an increase in the light emitting area. Further, the light distribution of the first light L ₁ and the light distribution of the second light L ₂ can be adjusted according to the shapes of the half mirror 52 and the light guide member 51.

As described above, the first light L ₁ is a high beam or a low beam, and the second light L ₂ is a daytime illumination having a weaker intensity than the high beam or the low beam. Therefore, the half mirror 52 is the incident light. It is preferable that the ratio of the reflected light to the light is larger than the ratio of the transmitted light to the incident light.

Further, in the vehicle headlight 1 of the present embodiment, a part of the first light L ₁ incident on the half mirror 52 is reflected by the half mirror 52, but the first light L incident on the half mirror 52 The other part of ₁ is transmitted through the half mirror 52. By reflecting a part of the first light L ₁ transmitted through the half mirror 52 upward by the reflecting member 56 in this way, a part of the first light L ₁ not reflected forward by the half mirror 52 is reflected. It can be effectively used as an overhead sign or the like. Further, by providing the reflecting member 56 above and below the third convex lens portion 54, it is possible to prevent the reflecting member 56 from interfering with the control of the light distribution of the second light L ₂ . Therefore, while suppressing the control of the light distribution of the second light L _{2 from} being hindered, a part of the first light L ₁ that is not reflected forward by the half mirror 52 is effectively used as an overhead sign or the like. be able to.

Further, in the vehicle headlight 1, since the half mirror 52 is visually recognized in the front view, each lamp can be made to shine even when each light source is not lit, and the design can be improved. In addition, the impression of appearance when each light source is lit and when it is not lit can be greatly changed.

(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 a part of the vehicle headlight of the present embodiment from the same viewpoint as that of FIG. The vehicle headlight of the present embodiment is composed of three lighting fixtures like the vehicle headlight 1 of the first embodiment. However, since the arrangement of these three lamps is the same as that of the vehicle headlight 1 of the first embodiment in the vehicle, the front view is the same as that of FIG. Hereinafter, among the lamps provided in the vehicle headlights of the present embodiment, the lamps 2a having the same arrangement in the vehicle as the lamps 1a will be described.

The lamp 2a is different from the lamp 1a in that it has the reflector 150 instead of the reflector 50.

In the reflector 150 of the present embodiment, a plurality of third convex lens portions 54 for controlling the light distribution of the second light L ₂ are formed on the back surface of the light guide member 51. Further, the reflecting member 56 is provided between the third convex lens portions 54 adjacent to each other.

By providing the reflecting member 56 between the third convex lens portions 54 adjacent to each other in this way, it is possible to prevent the reflecting member 56 from interfering with the control of the light distribution of the second light L ₂ . Therefore, while suppressing the control of the light distribution of the second light L _{2 from} being hindered, a part of the first light L ₁ that is not reflected forward by the half mirror 52 is effectively used as an overhead sign or the like. be able to.

(Third Embodiment)
Next, the third embodiment of the present invention will be described in detail with reference to FIG. The components that are the same as or equivalent to those of the first or second 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 a part of the vehicle headlight of the present embodiment from the same viewpoint as that of FIG. The vehicle headlight of the present embodiment is composed of three lighting fixtures like the vehicle headlight 1 of the first embodiment. However, since the arrangement of these three lamps is the same as that of the vehicle headlight 1 of the first embodiment in the vehicle, the front view is the same as that of FIG. Hereinafter, among the lamps provided in the vehicle headlights of the present embodiment, the lamps 3a having the same arrangement in the vehicle as the lamps 1a will be described.

The lamp 3a differs from the lamp 1a in that it has a reflector 250 instead of the reflector 50 and the second light source 42a is arranged above the light guide member 51.

In the lamp 3a of the present embodiment, the second light source 42a is arranged above the light guide member 51 as described above. Therefore, the upper surface of the light guide member 51 is the incident surface 55 on which the second light L ₂ is incident. Further, the reflector 250 of this embodiment, the upper surface of the light guide member 51, the second convex lens portion 57 to reduce the second divergent angle of the light L ₂ incident on the light guide member 51 is formed. Therefore, the surface of the second convex lens portion 57 is the incident surface 55. The second convex lens portion 57 reduces the divergence angle of the second light L _{2 and} causes the second light L ₂ to enter the light guide member 51, so that the second light L ₂ can be easily guided from the upper surface to the lower surface of the light guide member 51. ..

Further, the light guide member 51 has an internal reflection surface 53s on the back surface that internally reflects the _second light L2 incident from the incident surface 55. Inner reflective surface 53s, it is preferable that the second light L ₂ to total internal reflection. In this way, the second light source 42a is arranged above the light guide member 51, and the light guide member 51 has the internal reflection surface 53s, so that the size of the vehicle headlight in the front-rear direction is reduced, and the second light source 42a is second. The light of 2 can be emitted forward. Further, as described above, the second light L ₂ is guided from the upper surface to the lower surface of the light guide member 51, so that the second light L ₂ can be incident on a wide range of the internal reflection surface 53s. It becomes easy to irradiate the second light L ₂ over a wide range.

Further, in the reflector 250 of the present embodiment, a non-reflective portion 58 in which the half mirror 52 is not formed is provided on the front surface of the light guide member 51, and a part of the second light L ₂ is emitted from the non-reflective portion 58. .. By forming such a non-reflective portion 58, the second light L ₂ can be easily emitted through the light guide member 51, and the utilization efficiency of the second light L ₂ can be improved.

Further, in the reflector 250, a first convex lens portion 59 that diffuses the second light L ₂ is formed in the non-reflective portion 58. By forming such a first convex lens portion 59, the second light L ₂ can be irradiated in a wide range. Therefore, for example, the second light L ₂ can be easily used as the light of the daytime running lamp.

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

FIG. 7 is a cross-sectional view showing a part of the vehicle headlight of the present embodiment from the same viewpoint as that of FIG. The vehicle headlight of the present embodiment is composed of three lighting fixtures like the vehicle headlight 1 of the first embodiment. However, since the arrangement of these three lamps is the same as that of the vehicle headlight 1 of the first embodiment in the vehicle, the front view is the same as that of FIG. Hereinafter, among the lamps provided in the vehicle headlights of the present embodiment, the lamps 4a having the same arrangement in the vehicle as the lamps 1a will be described.

The lamp 4a differs from the lamp 1a in that it has a reflector 350 instead of the reflector 50 and the second light source 42a is arranged above the light guide member 51.

In the reflector 350 of the present embodiment, a concave lens portion 55a is formed on the upper surface of the light guide member 51, and the surface of the concave lens portion 55a is an incident surface 55. Since the incident surface 55 is recessed in this way, the second light L ₂ incident on the light guide member 51 from the incident surface 55 can easily travel straight.

Further, in the reflector 350, the internal reflection surface 53s is a surface curved so as to bulge outward. Since the internal reflection surface 53s is curved so as to bulge outward in this way, it is possible to prevent the divergence angle of the second light L ₁ after being reflected by the internal reflection surface 53s from becoming too large.

Although the present invention has been described above with reference to the first to fourth embodiments as examples, the present invention is not limited thereto.

For example, in the above embodiment, the vehicle headlight has three lamps, but the number of lamps is not limited to three, and may be four or more or two. Further, in the above embodiment, the lamps are arranged in the left-right direction, but the arrangement of the plurality of lamps is not limited to this, and the lamps may be arranged in the vertical direction, diagonally, or arranged in a U shape. Is also good.

Further, in the first embodiment, the reflection member 56 is provided on the upper portion and the lower portion of the third convex lens portion 54, but the reflection member 56 is provided only on one of the upper portion and the lower portion of the third convex lens portion 54. It may be provided, and the reflective member 56 may not be provided. Further, in the second embodiment, the reflective member 56 does not have to be provided between all the third convex lens portions 54, and the reflective member 56 may not be provided.

Further, although the example in which the non-reflective portion is formed on the light guide member only in the third embodiment of the first to fourth embodiments has been described, the light guide member is also non-reflective in other embodiments. A reflective portion may be formed. Further, the first convex lens portion may not be formed on the non-reflective portion.

Further, when the second light source is arranged above the light guide member as in the third embodiment and the fourth embodiment, the convex lens portion or the concave lens portion formed on the upper portion of the light guide member is an essential component. is not.

Further, in the above embodiment, an example has been described in which one of the first light sources provided in each of the plurality of lamps is a light source for a low beam and the other one is a light source for a high beam. However, the present invention is not limited to this embodiment, and in each lamp, a light source that emits light reflected by the half mirror 52 is provided separately from the first light source, and one of them is used as a light source for a low beam. The other may be a light source for a high beam.

Further, in the above embodiment, in each lamp, the reflector is fixed to the top plate 31 and extends from the upper side to the lower side. However, the present invention is not limited to this, and at least one of the respective lamps may be upside down.

According to the present invention, a vehicle headlight capable of emitting light having a different light distribution while suppressing an increase in a light emitting area is provided, and can be used in the field of vehicle headlights such as automobiles. ..

1 ... Vehicle headlights 1a to 1c ... Lighting equipment 10 ... Housing LUa to LUc ... Lighting equipment unit 30 ... Support member 31 ... Top plate 32 ... Back plate 41a to ... 41c ... First light source 42a to 42c ... Second light source 50 ... Reflector 51 ... Light guide member 52 ... Half mirror L ₁ ... First light L ₂ ... Second Light of

Claims (10)

A reflector in which a half mirror is formed on at least a part of the front surface of the light guide member,
A first light source that emits first light that is reflected forward while controlling the light distribution by the half mirror,
A second light source that emits a second light that passes through the half mirror and is emitted forward.
With
The light guide member controls the light distribution of the second light ,
The light guide member has a non-reflective portion on the front surface from which the half mirror is not formed.
A vehicle headlight, characterized in that a part of the second light is emitted from the non-reflective portion . The vehicle headlight according to claim 1 , wherein a first convex lens portion that diffuses the second light is formed in the non-reflective portion. A reflector in which a half mirror is formed on at least a part of the front surface of the light guide member,
A first light source that emits first light that is reflected forward while controlling the light distribution by the half mirror,
A second light source that emits a second light that passes through the half mirror and is emitted forward.
With
The light guide member controls the light distribution of the second light ,
The second light source is arranged above the light guide member,
The headlight for a vehicle is characterized in that the light guide member has an internal reflecting surface on the back surface that internally reflects the second light incident from the upper surface . The vehicle headlight according to claim 3 , wherein a second convex lens portion for reducing the divergence angle of the second light incident on the light guide member is formed on the upper surface of the light guide member. .. The vehicle headlight according to claim 3 or 4 , wherein the internal reflection surface is a surface curved so as to bulge outward. A reflector in which a half mirror is formed on at least a part of the front surface of the light guide member,
A first light source that emits first light that is reflected forward while controlling the light distribution by the half mirror,
A second light source that emits a second light that passes through the half mirror and is emitted forward.
With
The light guide member controls the light distribution of the second light ,
The second light source is arranged behind the light guide member.
A vehicle headlight characterized in that a third convex lens portion for controlling the light distribution of the second light is formed on the back surface of the light guide member . A reflector in which a half mirror is formed on at least a part of the front surface of the light guide member,
A first light source that emits first light that is reflected forward while controlling the light distribution by the half mirror,
A second light source that emits a second light that passes through the half mirror and is emitted forward.
With
The light guide member controls the light distribution of the second light ,
A reflective member that reflects a part of the first light that passes through the half mirror and is incident on the light guide member above the first light that is reflected by the half mirror is the light guide member. A vehicle headlight characterized by being installed on the back . The third convex lens portion is a reflective member that reflects a part of the first light that passes through the half mirror and is incident on the light guide member above the first light that is reflected by the half mirror. The vehicle headlight according to claim 6 , wherein the headlight for a vehicle is provided on at least one of a higher portion and a lower portion. A plurality of the third convex lens portions are formed,
Reflecting members that reflect a part of the first light that passes through the half mirror and is incident on the light guide member above the first light that is reflected by the half mirror are adjacent to each other. The vehicle headlight according to claim 6 , wherein the headlight is provided between the three convex lens portions. The light guide member has a non-reflective portion on the front surface from which the half mirror is not formed.
The vehicle headlight according to any one of claims 3 to 9, wherein a part of the second light is emitted from the non-reflective portion.

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