JP3963245B2 - Vehicle headlamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle headlamp.
[0002]
[Prior art]
As this type of vehicle headlamp, as shown in FIG. 10, left and right headlamps 2 and 3 with respect to the central axis 1a of the automobile 1, fog lamps (not shown) as auxiliary lights, and steering lamps (not shown) as well. The one with is known. If only the passing lights of the headlamps 2 and 3 are turned on, the road surface light distribution pattern B shown in FIG. 10 is set. The road surface light distribution pattern B is set so that the light reaches far away on the roadside A1 side with respect to the center line 1a of the automobile 1. In other words, in the passing light, the roadside A1 is irradiated so that a person H such as a pedestrian standing on the roadside A1 can be visually recognized, and the front side of the own vehicle runway A as the roadway is improved. And the central line A2. The roadside A1 here means an outside pedestrian roadside zone that is partitioned by the line A3 with respect to the vehicle running path A. Depending on the road, the portion of the line A3 may be the outermost side of the road. In this case, the portion inside the outermost side of the road is referred to as the roadside A1. Furthermore, the position corresponding to the line A3 may be configured by a curb, and in this case, the roadside A1 through which the person H or the like passes becomes outside the curb or inside the curb.
[0003]
The fog lamp irradiates the ground on the front side of the front side of the automobile 1 and can improve the front visibility in the fog. Further, the steering lamp is a side illumination lamp that illuminates the side of the automobile 1 in order to improve the visibility of the roadside A1 when traveling on a curved host road A or when turning a corner or the like. is there.
[0004]
[Problems to be solved by the invention]
However, although it is necessary to confirm whether or not there is a human H crossing the own vehicle runway A right now on the roadside A1, even though it is necessary to check before the vehicle 1 can be braked from the position where the human H stands, In such a state or a dim state where it rains even in the daytime, it is necessary to keep an eye on for confirmation, which may cause eyestrain. Therefore, when the headlamps 2 and 3 are turned on, the entire vehicle running path A becomes brighter, and it is difficult for the human H who is on the roadside A1 of the vehicle traveling path A to be visually recognized. Further, if the headlamps 2 and 3 are made to be traveling lights (high beams), the passengers of other vehicles such as the preceding vehicle and the oncoming vehicle, or the person H who stands in the roadside A1 are dazzled. Further, when the fog lamp is turned on, the human H crossing the vehicle running path A is easily visible, but the human H standing on the roadside A1 is difficult to see. Hard to see is almost the same level as the headlamps 2 and 3. Further, when the steering lamp is turned on, the roadside A1 on the right side of the automobile 1 can be seen, but it is difficult to see diagonally forward, and it is a level that further improves visibility for those who have poor visual acuity.
[0005]
The present invention has been made in view of such a conventional problem, and aims to improve the visibility of the roadside ahead of the traveling direction with a simple operation without causing dazzling to the passengers of other vehicles and the people on the roadside. An object of the present invention is to provide a vehicle headlamp that can be used.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is capable of irradiating the far side of the road on the side of the own vehicle with spot light in the vehicle headlamp provided at the front part of the automobile. A roadside illumination lamp is provided, and the roadside illumination lamp is a projector type having a light source, a reflector, and a convex lens, and is disposed between the reflector and the convex lens to block light from the reflector, and to the shade A penetrating hole, and irradiating the far side of the road on the side of the own vehicle with the spot light passing through the penetrating hole, so that a gradation area is generated in the spot light. The thickness is changed.
[0007]
According to the first aspect of the present invention, when the roadside distance on the side of the own vehicle is illuminated with spot light by the shoulder light, the pedestrians, bicycles, etc. on the roadside ahead can be illuminated from the near side. Therefore, while being able to grasp a pedestrian, a bicycle, etc. reliably, the position of the curb etc. by the side of a road can be checked. Therefore, during normal traveling along the main road, the visibility of the roadside ahead in the traveling direction is significantly improved. In addition, it is possible to improve the safety of automobiles on the road when visibility is reduced due to nighttime or worsening weather.
In addition, according to the first aspect of the present invention, the formation of the boundary line between the irradiation range and the non-irradiation range becomes clear by the projector-type road shoulder illumination lamp, so that the ground beside the road can be irradiated with high illuminance. it can.
[0008]
A second aspect of the present invention is the vehicle headlamp according to the first aspect, wherein the position where the road shoulder illumination lamp is disposed is closer to the front shoulder of the own vehicle running road side.
[0009]
According to the second aspect of the present invention, since the road shoulder illumination lamp is disposed near the front shoulder of the vehicle running road side, even if the road shoulder illumination light radiates spot light, Further, for example, a wall on the side of the automobile is not directly illuminated, and pedestrians, bicycles, etc. existing on the side of the road can be reliably irradiated, so that the visibility on the side of the road is further improved.
[0012]
A third aspect of the present invention is the vehicle headlamp according to any one of the first to second aspects, wherein the road shoulder illumination lamp is a high-intensity discharge lamp.
[0013]
According to the third aspect of the present invention, visibility can be remarkably improved by ensuring a field of view far away by the high-intensity discharge lamp.
[0014]
A fourth aspect of the present invention is the vehicle headlamp according to any one of the first to third aspects, wherein the road shoulder illumination lamp is interlocked with ON / OFF of a wiper switch.
[0015]
According to the invention described in claim 4 , when the wiper switch is operated when it is dimmed even in the daytime such as rainy weather, the road shoulder illumination light is turned on at the same time, so that the pedestrian cannot be found and “runs inadvertently” Can be surely prevented.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0017]
As shown in FIG. 1, the vehicle headlamps 2 and 3 shown in this embodiment are arranged on the left and right sides of the front end portion of the central shaft 1a of the automobile 1 as a vehicle, and the headlamp 2 is connected to the center line A2. The headlamp 3 is disposed on the roadside A1 side on the own vehicle running path A side. As shown in FIG. 2, a road shoulder illumination lamp 4 for irradiating the front along the roadside A1 is provided at a position on the roadside A1 side of the headlamp 3 located on the roadside A1 side of the own vehicle runway A. It becomes. The roadside illumination lamp 4 improves the visibility of the roadside A1 with respect to a rainlight 5 that improves the visibility of the roadside A1 with respect to the deterioration of the weather such as rain and snow, and improves the visibility of the roadside A1 with respect to a decrease in surrounding brightness. It is composed of two types consisting of the twilight lamp 6. The “roadside A1 on the own vehicle runway A side” here is a so-called single lane in which there is no dedicated road for the oncoming vehicle. For example, in the case of a left-hand drive (key preft principle), the road Means the left side of
[0018]
The headlamp 2 is located on the center line A2 side of the vehicle 1 and is set to the lower side of the passing light 21 and the lower side of the passing light 21, that is, the center side of the vehicle 1, and is set upward. The traveling light 22 is configured. The other headlamp 3 is located on the side of the road A1 from the automobile 1 and is set to face downward, the passing light 31 set downward, and the inside of the passing light 31, that is, the center side of the automobile 1, and set upward. The traveling light 32 is configured.
[0019]
As shown in FIG. 1, the roadside A1 means an outside pedestrian roadside zone that is partitioned by a line A3 with respect to the own vehicle running path A as a roadway. Further, depending on the road, the portion of the line A3 may be the outermost side of the roadway, and in this case, the part inside the outermost side of the roadway becomes the roadside A1. Furthermore, the position corresponding to the line A3 may be configured by a curb, and in this case, the roadside A1 through which the person H or the like passes becomes outside the curb or inside the curb.
[0020]
The headlamps 2 and 3 are set to have a road surface light distribution pattern B shown in FIG. 1 when only the passing lamps 21 and 31 are turned on. The road surface light distribution pattern B is set so that the light reaches far away on the roadside A1 side with respect to the central axis 1a of the automobile 1. That is, even in the passing lights 21 and 31, a person H such as a pedestrian on the roadside A1 side can be visually recognized.
[0021]
As shown in FIG. 2, the rainlight 5 and the twilight lamp 6 are arranged vertically at close positions so as to function as one roadside illumination lamp 4. The rain lamp 5 is disposed on the upper side, and the twilight lamp 6 is disposed on the lower side.
[0022]
As shown in FIGS. 2 and 3, the rain lamp 5 and the twilight lamp 6 are constituted by projector-type head lamps, and are provided with a high-intensity discharge lamp P1, a reflector P2, a shade P3, a convex lens P4, and others. It has become.
[0023]
The high-intensity discharge lamp P1 uses a light source that encloses xenon gas (Xe gas) and the like and applies a high voltage to cause arc discharge to emit light. The maximum light amount of P1 is 80000 cd, and that of the twilight lamp 6 is 50000 cd. The reflector P2 is composed of a composite ellipsoid. As shown in FIG. 4, the shade P3 is formed with a rectangular transmission hole P3a formed through the shade P3 together with an auxiliary plate P3b for improving rigidity.
[0024]
The shape of the transmission hole P3a is different from the rain lamp 5 and the twilight lamp 6.
[0025]
That is, the most effective scene when the rain lamp 5 is turned on is an image of improved visibility while traveling in a suburb where the traveling speed is relatively high (for example, 50 km / hour). As shown in FIGS. 5 and 6, the transmission hole P3a of the shade P3 has a forward distance L of 50 m when irradiated with the rain lamp 5 set at a height of about 0.65 meters from the ground. The angle θz downward with respect to the horizon S is in the range of a minute angle of about 0.5 degree to 1.0 degree (preferably about 0.744 degree) so that the human H such as a pedestrian in the distance of Further, the rectangular range E having a minute angle range of about 2 degrees from the traveling direction of the automobile 1 to the roadside direction of the roadside A1 on the own vehicle running road A side can be irradiated. The gradation area G where the brightness gradually changes is provided along the left and right sides of the rectangular range E so that the left-right angle δx is about 0.5 degrees. The gradation area G is generated so that the cut line is erased by changing the thickness of the shade P3 so that the focus of the convex lens 4 is not matched.
[0026]
On the other hand, the most effective scene when the twilight lamp 6 is turned on is an image of improved visibility while traveling in an urban area where the traveling speed is relatively low (for example, 20 km / hour). As shown in FIGS. 7 and 8, the transmission hole P3a of the shade P3 has a forward distance L of 20 m when irradiated with the twilight lamp 6 set at a height of about 0.65 meters from the ground. The angle θz downward with respect to the horizon S is in the range of a minute angle of about 1.6 ° to 2.0 ° (preferably about 1.8 °) so that a human H such as a pedestrian in the distance of The rectangular range E is formed such that the left-right angle θx is a minute angle range of about 5 degrees from the traveling direction of the automobile 1 to the roadside direction of the roadside A1 on the own vehicle running road A side. The gradation area G in which the brightness gradually changes is provided along the left side, the right side, and the lower side of the rectangular range E so that the left-right angle δx is about 0.5 degrees. In the lower gradation area G, the vertical angle δz is 0.2 degrees. The gradation area G is generated so that the cut line is erased by changing the thickness of the shade P3 so that the focus of the convex lens 4 is not matched.
[0027]
The rainlight 5 and the twilight lamp 6 can be individually turned on by a switch for the rainlight 5 and a switch for the twilight lamp 6 provided in the cab of the automobile 1. However, the rainlight 5 may be turned on by detecting, for example, rain, snow, fog, etc. during bad weather, or in conjunction with the wiper. On the other hand, with respect to the twilight lamp 6, it is detected by detecting that the brightness of the surroundings of the automobile 1 is lower than the predetermined brightness, or linked to the headlamps 2, 3 and a vehicle width lamp (not shown). And what lights up may be sufficient.
[0028]
In the vehicle headlamp configured as described above, the rain lamp 5 is turned on in bad weather, and the twilight lamp 6 is turned on when the brightness is lower than a predetermined brightness such as at dusk, at night, or in a tunnel. Alternatively, by lighting both the rain lamp 5 and the twilight lamp 6 depending on the weather and brightness, it is possible to reliably irradiate a pedestrian (human being H), a bicycle, a curb on the shoulder of the road, etc. located in front of the automobile 1. Therefore, the visibility of the roadside A1 in front of the automobile 1 requiring special attention is further improved.
[0029]
Further, the rain lamp 5 and the twilight lamp 6 of the road shoulder irradiation lamp 4 are installed near the road shoulder which is the outermost end of the car 1 (the left side of the car 1), and the optical axis directions of the rain lamp 5 and the twilight lamp 6 are set to the car. 1, even if the rain lamp 5 and the twilight lamp 6 of the road shoulder irradiation light 4 irradiate the spot light, the irradiation angle with respect to the traveling direction of the automobile 1 is small. It is difficult to directly illuminate a surface such as a road, and it is possible to reliably irradiate only a pedestrian or a person H such as a bicycle on the side of the road A1, for example, on the wall side, thereby further improving the visibility of the road side A1.
[0030]
Further, since the rain lamp 5 and the twilight lamp 6 of the shoulder lamp 4 are projector-type, the formation of the boundary line between the irradiation range and the non-irradiation range becomes clear, for example, the height of the eyes of a human H such as a pedestrian If it arrange | positions so that light may not reach, it will not become dazzling light of humans H, such as a pedestrian, and will not give discomfort to humans H, such as a pedestrian who walks along the roadside A1.
[0031]
In addition, since the rain lamp 5 and the twilight lamp 6 of the shoulder lamp 4 are made of the high-intensity discharge lamp P1, the visibility can be remarkably improved by ensuring the field of view far away.
[0032]
Also, when the wiper switch (not shown) is activated when it is dim in the daytime, such as in rainy weather, the road shoulder illumination lamp 4 is turned on at the same time. It can be surely prevented.
[0033]
Moreover, since the road shoulder irradiation lamp 4 can confirm the human H who is a pedestrian with the rain lamp 5 against the deterioration of the weather such as rain and snow, the visibility in front of the roadside A1 can be improved. . Needless to say, the deterioration of the weather includes fog and others.
[0034]
Moreover, since the roadside illumination lamp 4 can confirm the human H who is a pedestrian by the dusk light 6 against the decrease in the brightness of the surroundings, particularly when the visibility is lowered at dusk from daytime to evening, The visibility in front of the roadside A1 in the tunnel or the like can be improved.
[0035]
Moreover, since the rain lamp 5 can recognize 50 m ahead and the twilight lamp 6 can recognize 20 m ahead, the front along the roadside A <b> 1 can be obtained by simultaneously lighting the rain lamp 5 and the twilight lamp 6. Can illuminate a wide range of. Therefore, the safety can be further improved.
[0036]
In the above-described embodiment, the road shoulder illumination lamp 4 is configured to be provided with the rain lamp 5 and the twilight lamp 6, but may be configured to provide only the rain lamp 5 or only the twilight lamp 6. . Further, either one or both of the rain lamp 5 and the twilight lamp 6 may be integrated with the passing lamp 31. Further, the passing lamp 21 and the traveling lamp 22 are configured as an integrated headlamp 2, and the passing lamp 31 and the traveling lamp 32 are configured as an integrated headlamp 3. And either or both of the twilight lamps 6 may be configured integrally.
[0037]
In the above description, the rain lamp 5 and the twilight lamp 6 are arranged up and down, but as shown in FIG. 9, they may be arranged horizontally on the left and right. In this case, it is preferable that the rain lamp 5 that irradiates farther is disposed on the inner side and the twilight lamp 6 is disposed on the outer side. In this case as well, only the rain lamp 5 or only the twilight lamp 6 may be provided, and either one or both of the rain lamp 5 and the twilight lamp 6 are integrated with the passing lamp 31 or the like. You may comprise.
[0038]
【The invention's effect】
According to the first aspect of the present invention, when a roadside distance on the side of the own vehicle is irradiated with spot light by a shoulder light, a pedestrian, a bicycle, etc. on the side of the road ahead can be illuminated from the near side. Therefore, while being able to grasp | ascertain reliably, the position of the curb etc. by the side of a road can be confirmed. Therefore, during normal traveling along the main road, the visibility of the roadside ahead in the traveling direction is significantly improved. In addition, it is possible to improve the safety of automobiles on the road when visibility is reduced due to nighttime or worsening weather.
In addition, according to the first aspect of the present invention, the formation of the boundary line between the irradiation range and the non-irradiation range becomes clear by the projector-type roadside illumination lamp, so that the roadside ground can be irradiated with high illuminance. it can.
[0039]
According to the invention described in claim 2, since the road shoulder illumination lamp is disposed near the road shoulder on the side of the own vehicle, even if the road shoulder illumination light irradiates spot light, For example, a side wall, for example, a wall is not directly illuminated, and a pedestrian, bicycle, or the like existing on the side of the road can be reliably irradiated, so that the visibility on the side of the road is further improved.
[0041]
According to the third aspect of the present invention, visibility can be remarkably improved by ensuring a field of view far away by the high-intensity discharge lamp.
[0042]
According to the invention described in claim 4 , when the wiper switch is operated when it is dim in the daytime such as rainy weather, the road shoulder illumination lamp is turned on at the same time, so that the pedestrian cannot be found, and “inadvertently miss” Can be surely prevented.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a road surface light distribution pattern by irradiation of a headlamp which is a vehicle headlamp shown as an embodiment of the present invention.
2 is an external perspective view showing a vehicle headlamp of the automobile of FIG. 1. FIG.
3 is a cross-sectional view schematically showing the rain lamp and twilight lamp of FIG. 2. FIG.
4 is a view showing shades of the rainlight and twilight light in FIG. 3, wherein (a) is a front view according to an arrow A, and (b) is a sectional view taken along line BB in (a). is there.
5 is an explanatory view showing an optical axis of a rain lamp in the vehicle headlamp of FIG. 2. FIG.
6 is an explanatory diagram showing a rectangular range irradiated by the rain lamp of FIG. 5. FIG.
7 is an explanatory diagram showing an optical axis of a twilight lamp in the vehicle headlamp of FIG. 2. FIG.
FIG. 8 is an explanatory diagram showing a rectangular range irradiated by the twilight lamp of FIG. 7;
FIG. 9 is an external perspective view of a vehicle headlamp shown as another embodiment of the present invention.
FIG. 10 is an explanatory diagram showing a road surface light distribution pattern by irradiation of a headlamp in a conventional vehicle headlamp.
[Explanation of symbols]
1 Car 2, 3 Headlamp 4 Shoulder Light 5 Rainlight 6 Dusk Light A Own Car Runway A1 Roadside

Claims (4)

In a vehicle headlamp provided at the front of an automobile,
A roadside illumination lamp that can irradiate the roadside distance on the side of the own vehicle with spot light,
The roadside illumination lamp is a projector type having a light source, a reflector, and a convex lens, and is disposed between the reflector and the convex lens so as to block light from the reflector , and a transmission hole formed through the shade. And irradiating the far side of the road on the side of the own vehicle with the spot light passing through the transmission hole ,
The vehicular headlamp characterized by changing the thickness of the shade so that a gradation area is generated in the spot light . The vehicle headlamp according to claim 1,
A vehicular headlamp characterized in that a position at which the road shoulder illumination lamp is disposed is closer to the road shoulder on the front side of the own vehicle running path. A vehicle headlamp according to any one of claims 1 to 2,
The vehicular headlamp is characterized in that the road shoulder lamp is a high-intensity discharge lamp. A vehicle headlamp according to any one of claims 1 to 3,
The vehicular headlamp is characterized in that the road shoulder lamp is interlocked with ON / OFF of a wiper switch.

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