JP2010257934A - Lighting fixture for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture for vehicle which is constructed so as to form selectively a light distribution pattern for rainy weather running and a light distribution pattern for high beam, in which the light distribution pattern for rainy weather running is formed with sufficient brightness with a low cost structure. <P>SOLUTION: Light from an H4 halogen bulb is reflected frontward by a reflector 20. In this case, the rainy weather running light distribution pattern is formed by lighting of a low beam filament 18a, and the high beam light distribution pattern is formed by lighting of a high beam filament 18b. Then, by combination of light from the low beam filament 18a which is reflected by each of a plurality of reflection elements 20c formed at the reflection face 20 of the reflector 20, two nearly spot-like distribution patterns PA, PB are formed at the mutually separated positions in right and left direction as the rainy weather running light distribution pattern PR. Thereby, a pair of lane marks LM1, LM3 located at both sides of the vehicle front road surface is efficiently irradiated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular illumination lamp configured to be able to selectively form a light distribution pattern for running in rain and a light distribution pattern for high beam.

  2. Description of the Related Art Conventionally, a vehicle illumination lamp having a configuration including an H4 halogen bulb and a reflector that reflects light from the H4 halogen bulb forward is known.

  In such a vehicular illumination lamp, generally, a low beam light distribution pattern is formed by lighting a low beam filament of an H4 halogen bulb, and a high beam light distribution pattern is formed by lighting a high beam filament of an H4 halogen bulb. It is like that.

  “Patent Document 1” describes a configuration in which a special second vehicular illumination lamp is additionally arranged with respect to such a general first vehicular illumination lamp.

  This second vehicular illumination lamp reinforces the brightness of the far road shoulder in the low beam distribution pattern formed by the first vehicular illumination lamp when the low beam filament of the H4 halogen bulb is lit. An additional light distribution pattern is formed, and when the high beam filament of the H4 halogen bulb is turned on, the brightness of the central portion of the high beam light distribution pattern formed by the first vehicle illumination lamp is reinforced. For this purpose, an additional light distribution pattern is formed.

JP 2003-59317 A

  If the additional light distribution pattern for irradiating the far road shoulder portion formed by the second vehicular illumination lamp described in the above-mentioned “Patent Document 1” is formed during rainy driving with a low beam, this addition The light distribution pattern can be used for irradiating a lane mark (that is, a white line for partitioning the vehicle travel lane), thereby improving forward visibility during rainy weather travel.

  However, in the configuration described in “Patent Document 1”, a light-shielding film is applied to the tube wall of the H4 halogen bulb in order to form an additional light distribution pattern for irradiating the shoulder portion of the far road. Part of the light traveling from the filament toward the reflecting surface of the reflector is shielded.

  For this reason, there is a problem that the utilization efficiency of the light source luminous flux is poor, and therefore, the additional light distribution pattern for irradiating the far shoulder portion cannot be formed with sufficient brightness. In addition, since the light shielding film needs to be applied, there is a problem that the cost of the lamp is high.

  The present invention has been made in view of such circumstances, and in a vehicular illumination lamp configured to be able to selectively form a light distribution pattern for running on rainy weather and a light distribution pattern for high beam, An object of the present invention is to provide a vehicular illumination lamp capable of forming a light distribution pattern for running on rainy weather with sufficient brightness with an inexpensive configuration.

  In the present invention, the H4 halogen bulb is used as it is, and the object is achieved by devising the configuration of the reflecting surface of the reflector that reflects the light from the H4 halogen bulb forward. It is.

That is, the vehicular illumination lamp according to the present invention is:
A vehicle illumination lamp configured to be able to selectively form a light distribution pattern for running on rainy weather and a light distribution pattern for high beam,
An H4 halogen bulb and a reflector that reflects light from the H4 halogen bulb forward;
When the low beam filament of the H4 halogen bulb is lit, the light distribution pattern for running in the rain is formed, and when the high beam filament of the H4 halogen bulb is lit, the high beam light distribution pattern is formed. Configured,
A plurality of reflecting elements are formed on the reflecting surface of the reflector,
By combining light from the low beam filaments reflected by each of the plurality of reflective elements, two substantially spot-shaped light distribution patterns are formed at positions separated from each other in the left-right direction as the light distribution pattern for running on rainy weather. It is comprised so that it may be characterized by the above-mentioned.

  The above-mentioned “light distribution pattern for running on rainy weather” is specific to each of the light distribution patterns as long as it is composed of two substantially spot-shaped light distribution patterns formed at positions separated from each other in the left-right direction. There is no particular limitation on the shape and size, or the formation position thereof.

  As shown in the above configuration, the vehicular illumination lamp according to the present invention forms a light distribution pattern for running in the rain when the low beam filament of the H4 halogen bulb is lit, and the high beam filament of the H4 halogen bulb is lit. In this case, a high-beam light distribution pattern is formed. However, a plurality of reflective elements are formed on the reflecting surface of the reflector, and the low-beam filament reflected from each of the plurality of reflective elements is used. Since it is configured to form two substantially spot-shaped light distribution patterns at positions separated from each other in the left-right direction as a light distribution pattern during rainy weather by combining light, the following operational effects are obtained. be able to.

  That is, since the H4 halogen bulb is used as it is, two substantially spot-like light distribution patterns are formed at positions separated from each other in the left-right direction by a combination of reflected light from a plurality of reflecting elements. The pair of lane marks located on both sides of the road surface in front of the vehicle can be efficiently irradiated without causing glare to the oncoming vehicle driver by the road surface reflected light. Thus, it is possible to form a light distribution pattern for rainy travel that is suitable for improving forward visibility during rainy travel.

  As described above, according to the present invention, in the vehicular illumination lamp configured to be able to selectively form the light distribution pattern for rainy travel and the light distribution pattern for high beam, the vehicle lighting device can be used for rainy travel with an inexpensive configuration. The light distribution pattern can be formed with sufficient brightness.

  In the above configuration, if the light distribution pattern on the own lane side is formed as a light distribution pattern brighter than the light distribution pattern on the opposite lane side among the two substantially spot-shaped light distribution patterns, the following operation is performed. An effect can be obtained.

  That is, it is the lane mark that extends along the road shoulder on the own lane side that needs to be irradiated in particular when the light distribution pattern for running on rainy weather is formed. Therefore, by making the light distribution pattern on the own lane side brighter than the light distribution pattern on the opposite lane side, it is possible to form a light distribution pattern for rainy weather travel that is more suitable for improving forward visibility during rainy weather travel. Can do.

  In the above configuration, if the H4 halogen bulb is arranged in a state where its central axis is directed upward at a predetermined angle with respect to the optical axis of the reflector, it is formed at positions separated from each other in the left-right direction. Each of the two substantially spot-like light distribution patterns has a light / dark boundary line at the upper end thereof, and a portion near the light / dark boundary line can be formed as a bright light distribution pattern. Thereby, forward visibility during rainy weather travel can be further enhanced. In this case, the specific value of the “predetermined angle” is not particularly limited, but can be set to a value within a range of about 1 to 6 °, for example.

  In the above configuration, if the plurality of reflective elements are formed so as to extend in a direction substantially orthogonal to the boundary line between the reflective region where the light from the low beam filament is incident on the reflective surface and the reflective region where the light is not incident, Since it is possible to easily align the upper end position of the light distribution pattern formed by the reflected light from each of these reflective elements, the two substantially spot-shaped light distribution patterns constituting the light distribution pattern for running on rainy weather are provided. Each can be formed as a light distribution pattern in which the bright and dark boundary line at the upper end is clearer and the vicinity of the bright and dark boundary line is brighter. And thereby, forward visibility at the time of rainy weather driving | running can be improved more.

  A headlamp can be configured by combining the above-mentioned vehicular illumination lamp with a lamp for forming a low-beam light distribution pattern, and this headlamp is usually provided on the left side and the right side of the front end of the vehicle, respectively. It is done.

  Therefore, the vehicle illumination lamp is provided on the left side and the right side of the front end portion of the vehicle, and the upward inclination angle of the central axis of the H4 halogen bulb is such that the left side vehicle illumination lamp and the right side vehicle If it is set as the structure set to a mutually different value with an illuminating lamp, the following effects can be acquired.

  That is, as described above, it is the lane mark on the own lane that is particularly required to be irradiated with the light distribution pattern for running on rainy weather, but the road surface in front of the vehicle is seen through from the position of the vehicle lighting lamp. Sometimes, the lane mark is a straight line extending obliquely upward toward the vanishing point in the front direction of the lamp. In this case, the inclination angle of the straight line is different from each other because the vehicle illumination lamp on the left side and the vehicle illumination lamp on the right side have different distances in the vehicle width direction to the lane mark.

  On the other hand, by changing the upward inclination angle of the central axis of the H4 halogen bulb, the inclination angle of the light / dark boundary line at the upper end of each of the two substantially spot-like light distribution patterns constituting the light distribution pattern for running on rainy weather is changed. Can be made.

  Therefore, by setting the upward inclination angle of the central axis of the H4 halogen bulb to different values for the left vehicle lighting fixture and the right vehicle lighting fixture, two substantially spot-like light distribution patterns are obtained. Among them, the light distribution pattern on the own lane side can be formed as a light distribution pattern having a light / dark boundary line substantially along the inclination angle of the lane mark on the own lane side. And thereby, forward visibility at the time of rainy weather driving | running can be improved further.

  In the above configuration, if the vehicular illumination lamp is configured to form the light distribution pattern during rainy weather by irradiating with blue light, the following effects can be obtained.

  That is, since the lane mark is generally formed in white, the visibility can be enhanced by irradiating it with blue light. On the other hand, it is conceivable to irradiate the light distribution pattern for low beam formed by other lamps with blue light, but in this case, the road surface in front of the vehicle is entirely irradiated with blue light. As a result, the driver of the vehicle is uncomfortable. Therefore, it is preferable that the rain distribution light distribution pattern is formed by irradiating with blue light so that only the lane mark portion of the road surface in front of the vehicle is irradiated with blue light. In addition, by adopting such a configuration, the visibility of the lane mark can be enhanced not only when traveling in the rain but also during normal traveling.

  Here, “blue light” means light that is bluer than white light emitted from another lamp in order to form a light distribution pattern for low beam. Specifically, for example, visible light having a dominant wavelength of 490 nm or less (more preferably, visible light having a dominant wavelength of 485 nm or less) can be used as “blue light”.

  As a means for realizing this, for example, on the reflection surface of the reflector, at least part of the reflection region where the light from the low beam filament is incident, the surface for converting the reflected light from the reflection region into blue light In the glass tube of the H4 halogen bulb, the light transmitted through the portion is transmitted to at least a part of the outer peripheral surface of the portion through which light traveling from the low beam filament to the reflecting surface of the reflector is transmitted. A structure or the like that has been subjected to a surface treatment for making it possible can be employed.

  In the case of adopting the former configuration, it is possible to finely set a region formed of blue light in the rain-light traveling light distribution pattern. On the other hand, when the latter configuration is adopted, at least a part of the light distribution pattern for running in rain can be formed with blue light with a simple configuration.

Side sectional view showing a vehicular illumination lamp according to an embodiment of the present invention A rain-light running light distribution pattern formed on a virtual vertical screen disposed at a position 25 m ahead of the lamp by the light radiated forward from the vehicle headlamp is transparently seen from the back side together with the reflector unit. Illustration The figure which shows perspectively the light distribution pattern for high beams formed on the said virtual vertical screen by the light irradiated ahead from the said vehicle headlamp The formation processes (a) and (b) of the light distribution pattern for rain travel are changed to the formation processes (c), (d) and (e), (b) of the light distribution pattern for rain travel according to the modification of the embodiment. Figure shown with f) The same figure as FIG. 2 which shows two other modifications of the said embodiment. FIG. 1 is a view similar to FIG. 1 showing two other modifications of the embodiment. FIG. 2 is a view similar to FIG. 2 showing the operation of the other two modifications.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing a vehicular illumination lamp 10 according to the present embodiment.

  As shown in the figure, the vehicular illumination lamp 10 has a configuration in which a reflector unit 16 is incorporated in a lamp chamber formed by a transparent light-transmitting cover 12 and a lamp body 14.

  The reflector unit 16 includes an H4 halogen bulb 18 serving as a light source bulb and a reflector 20 that reflects light from the H4 halogen bulb 18 forward. 14 is supported so as to be tiltable in the vertical and horizontal directions. The reflector unit 16 is arranged with the optical axis Ax of the reflector 20 extending in the vehicle front-rear direction when the aiming adjustment is completed.

  The H4 halogen bulb 18 includes a low-beam filament 18a extending in the front-rear direction on the central axis Ax1, and a high-beam filament 18b extending in the front-rear direction by being slightly displaced from the central axis Ax1 in the vicinity of the rear of the low-beam filament 18a. And an inner shade 18c surrounding the low beam filament 18a at a central angle of 165 ° in the vicinity of the lower portion of the low beam filament 18a.

  The H4 halogen bulb 18 is inserted and fixed from the rear side into an opening 20b formed at the rear top of the reflector 20. This insertion and fixing is performed in a state where the central axis Ax1 of the H4 halogen bulb 18 is directed upward by a predetermined angle θ (specifically θ = 1.5 °) with respect to the optical axis Ax of the reflector 20, and It is performed in a state where the upper end edges on the left and right sides of the inner shade 18c are the same height.

  The reflector 20 reflects light from the low beam filament 18a or the high beam filament 18b forward as diffused light or deflected light by the reflecting surface 20a. The reflector 20 forms a light distribution pattern during rainy weather (which will be described later) when the low beam filament 18a is lit, and a high beam light distribution pattern (also about this) when the high beam filament 18b is lit. (To be described later).

  FIG. 2 shows a light distribution pattern PR for running on rainy weather formed on a virtual vertical screen arranged at a position 25 m ahead of the lamp by the light radiated forward from the vehicular illumination lamp 10, together with the reflector unit 16 on the back surface thereof. It is a figure shown transparently from the side.

  As shown in the figure, the reflecting surface 20a of the reflector 20 has a slightly horizontally long outer shape that is symmetrical with respect to the optical axis Ax.

  A reflection area indicated by a broken line in the drawing on the reflection surface 20a is a reflection area where light from the low beam filament 18a does not enter due to the light shielding action of the inner shade 18c. In this reflection surface 20a, the boundary line L between the reflection region where the light from the low beam filament 18a is incident and the reflection region where the light is not incident is left and right from the optical axis Ax toward the left and right sides as indicated by a one-dot chain line in the figure. It is symmetrical and extends diagonally downward. As described above, this is because the upper end edges of the left and right sides of the inner shade 18c are set at the same height.

  The reflection surface 20a is composed of an upper reflection area 20a1 that is slightly wider than the upper half, and a remaining lower reflection area 20a2. At that time, the boundary line between the upper reflection area 20a1 and the lower reflection area 20a2 is set to a position where the boundary line L is slightly translated downward.

  The upper reflection region 20a1 of the reflection surface 20a has a configuration in which a plurality of reflection elements 20s are formed on a paraboloid of revolution having the optical axis Ax as a central axis. At this time, as shown in FIG. 1, the focal point F of the paraboloid of revolution is set at the position of the front end portion of the high beam filament 18b on the optical axis Ax.

  As shown in FIG. 2, the upper reflective region 20a1 is divided into a substantially lattice shape by a curve extending in a direction substantially orthogonal to the boundary line L and a curve extending substantially parallel to the boundary line L. Each of the plurality of reflective elements 20s is assigned to each of the plurality of segments thus divided.

  The upper reflection region 20a1 is a pair of left and right first regions Z1L and Z1R close to a vertical plane including the optical axis Ax, a pair of left and right second regions Z2L and Z2R adjacent to both sides thereof, and further adjacent to both sides thereof. It comprises a pair of left and right third regions Z3L, Z3R.

  On the other hand, the lower reflection region 20a2 is formed of a single curved surface formed with the paraboloid of revolution as a reference surface.

  The rain travel light distribution pattern PR shown in FIG. 2 is composed of two substantially spot-shaped light distribution patterns PA and PB formed at positions separated from each other in the left-right direction.

  In the figure, for convenience, it is assumed that the reflector unit 16 is arranged at the center of the left and right sides of the own vehicle traveling lane on the left-side road of one lane. Is shown. In this state, the lane mark LM1 on the shoulder side located on the left side of the own vehicle traveling lane and the lane mark LM2 on the center line located on the right side of the own vehicle traveling lane are vanishing points in the front direction of the lamp HV. The lane mark LM3 on the opposite lane side extends obliquely downward to the right and left from the HV at an angle that is substantially horizontal compared to the lane mark LM2 on the center line.

  The light distribution pattern PA on the left side (that is, the own lane side) has a right end located near the VV line passing through HV in the vertical direction, and an upper end passing through HV in the horizontal direction. Extends substantially horizontally. The light distribution pattern PA is formed so as to straddle the lane mark LM1 on the roadside.

  This light distribution pattern PA is formed as a combined light distribution pattern of three light distribution patterns Pa1, Pa2, and Pa3.

  The light distribution pattern Pa1 is a light distribution pattern formed by reflected light from the first region Z1R on the right side in the upper reflective region 20a1. The light distribution pattern Pa1 is formed as a relatively large light distribution pattern because the first region Z1R is located near the low beam filament 18a.

  The light distribution pattern Pa2 is a light distribution pattern formed by reflected light from the second region Z2R on the right side in the upper reflective region 20a1. The light distribution pattern Pa2 is formed as a light distribution pattern smaller than the light distribution pattern Pa1 because the second region Z2R is slightly separated from the low beam filament 18a.

  The light distribution pattern Pa3 is a light distribution pattern formed by reflected light from the third region Z3R on the right side in the upper reflective region 20a1. This light distribution pattern Pa3 is formed as a light distribution pattern smaller than the light distribution pattern Pa2 because the third region Z3R is considerably separated from the low beam filament 18a.

  All of these three light distribution patterns Pa1, Pa2, and Pa3 have a light and dark boundary line extending in a substantially horizontal direction at the upper end thereof. These three light distribution patterns Pa1, Pa2, Pa3 are formed such that the positions of the bright and dark boundary lines are aligned substantially on the HH line, and the right end positions thereof are aligned in the vicinity of HV. As a result, the light distribution pattern PA on the left side irradiates the lane mark LM1 on the shoulder side substantially uniformly from the short-distance region to the far-distance region and brightly illuminates the far road shoulder portion on the own lane side. .

  The light distribution pattern PB on the right side (that is, on the opposite lane side) has a left end at a position away from the H-V to the right, and an upper end extending in a substantially horizontal direction along the H-H line. The light distribution pattern PB is formed so as to straddle the lane mark LM3 on the opposite lane side.

  This light distribution pattern PB is formed as a combined light distribution pattern of three light distribution patterns Pb1, Pb2, and Pb3.

  Each of these light distribution patterns Pb1, Pb2, Pb3 is a light distribution pattern formed by reflected light from each of the first to third regions Z1L, Z2L, Z3L on the left side in the upper reflection region 20a1, and each light distribution pattern Pa1 , Pa2 and Pa3 have substantially symmetrical shapes.

  These three light distribution patterns Pb1, Pb2, and Pb3 are formed such that the positions of the bright and dark boundary lines are substantially aligned with the HH line, and the position of the left end thereof is made closer to HV in this order. As a result, the light distribution pattern PB on the right side irradiates the lane mark LM3 on the opposite lane side substantially uniformly from the short-distance area to the far-distance area and brightly illuminates the far road shoulder on the opposite lane side. Yes.

  In this rain-light traveling light distribution pattern PR, the right end of the left side light distribution pattern PA is positioned near the VV line, and the right end of the right light distribution pattern PB is from HV to the right side. Since it is in a distant position, glare is not given to the oncoming vehicle driver by road surface reflected light.

  The light distribution patterns Pa1, Pa2, Pa3 constituting the left light distribution pattern PA and the light distribution patterns Pb1, Pb2, Pb3 constituting the right light distribution pattern PB are light and dark extending substantially horizontally in the upper end thereof. The light distribution pattern having the boundary line is due to the following reason.

  That is, if the upper reflection region 20a1 of the reflection surface 20a is formed with a surface shape that remains the paraboloid of revolution, the light distribution pattern formed on the virtual vertical screen is The light distribution pattern PRo as shown in 4 (b) is obtained.

  The light distribution pattern PRo is formed in a substantially fan shape, and has a pair of left and right boundary lines PRo1 extending in the substantially horizontal direction at the upper end thereof. As described above, this is because the center axis Ax1 of the H4 halogen bulb 18 is directed upward by a predetermined angle θ with respect to the optical axis Ax of the reflector 20, and the left and right upper end edges of the inner shade 18c are the same height. This is because the position is set.

  Actually, since the plurality of reflecting elements 20s are formed in the upper reflecting region 20a1 of the reflecting surface 20a, the left and right sides are caused by the diffuse deflection reflecting action of the plurality of reflecting elements 20s as shown in FIG. A rain-light traveling light distribution pattern PR composed of two substantially spot-shaped light distribution patterns PA and PB formed at positions separated from each other in the direction is formed.

  FIG. 3A is a perspective view showing a high beam light distribution pattern PH formed on the virtual vertical screen by light emitted forward from the vehicular illumination lamp 10.

  This high beam light distribution pattern PH is formed as a combined light distribution pattern of three light distribution patterns PC, PD, and PE, and has a hot zone (that is, a high luminous intensity region) HZ in the vicinity of HV.

  The light distribution patterns PC and PD are light distribution patterns respectively corresponding to the light distribution patterns PA and PB in the light distribution pattern PR for traveling in rainy weather.

  That is, the light distribution pattern PC is formed as a combined light distribution pattern of three light distribution patterns Pc1, Pc2, and Pc3 as shown in FIG. At that time, these three light distribution patterns Pc1, Pc2, and Pc3 are respectively formed by reflected light from the first region Z1R, the second region Z2R, and the third region Z3R on the right side in the upper reflective region 20a1. It is a light distribution pattern.

  These three light distribution patterns Pc1, Pc2, and Pc3 are formed such that their lower ends are positioned slightly below the HH line and their left ends are positioned in the vicinity of the VV line.

  Further, as shown in FIG. 3B, the light distribution pattern PD is formed as a combined light distribution pattern of three light distribution patterns Pd1, Pd2, and Pd3. At that time, these three light distribution patterns Pd1, Pd2, and Pd3 are respectively formed by reflected light from the left first region Z1L, second region Z2L, and third region Z3L in the upper reflective region 20a1. It is a light distribution pattern.

  These three light distribution patterns Pd1, Pd2, and Pd3 are formed such that the lower ends thereof are located slightly below the HH lines and the right ends thereof are located to the right of the VV lines.

  The light distribution pattern PE is a light distribution pattern formed by reflected light from the lower reflective region 20a2. As shown in FIG. 3D, the light distribution pattern PE is formed as a horizontally long light distribution pattern extending in the left-right direction around HV, and has a hot zone HZe in the vicinity of HV. . The hot zone HZ of the high beam light distribution pattern PH is mainly formed by the hot zone HZe of the light distribution pattern PE.

  As described above in detail, the vehicular illumination lamp 10 according to the present embodiment forms the light distribution pattern PR for running in the rain when the low beam filament 18a of the H4 halogen bulb 18 is turned on, and the H4 halogen bulb 18 The high beam filament 18b is turned on to form a high beam light distribution pattern PH. However, a plurality of reflecting elements 20s are formed on the reflecting surface 20a of the reflector 20, and the plurality of reflections are reflected. By combining light from the low beam filament 18a reflected by each of the elements 20s, two substantially spot-like light distribution patterns PA and PB are formed at positions separated from each other in the left-right direction as a light distribution pattern PR for running in rainy weather. Since it is comprised, it can obtain the following effects.

  That is, using the H4 halogen bulb 18 as it is, two substantially spot-like light distribution patterns PA and PB are formed at positions separated from each other in the left-right direction by a combination of reflected light from the plurality of reflecting elements 20s. Therefore, the pair of lane marks LM1 and LM3 located on both sides of the road surface ahead of the vehicle can be efficiently irradiated without causing glare to the oncoming vehicle driver due to the road surface reflected light. Thus, it is possible to form a light distribution pattern PR for rainy travel suitable for improving forward visibility during rainy travel.

  As described above, according to the present embodiment, in the vehicular illumination lamp 10 configured to be able to selectively form the light distribution pattern PR and the high beam light distribution pattern PH when traveling in rainy weather, with an inexpensive configuration, It is possible to form the light distribution pattern PR for running on rainy weather with sufficient brightness.

  In addition, in the present embodiment, the H4 halogen bulb 18 is disposed with its center axis Ax1 facing upward with respect to the optical axis Ax of the reflector 20 at a predetermined angle θ, so that they are separated from each other in the left-right direction. Each of the two substantially spot-like light distribution patterns PA and PB formed at a certain position has a light / dark boundary line at the upper end thereof, and a portion near the light / dark boundary line can be formed as a bright light distribution pattern. . Thereby, forward visibility during rainy weather travel can be further enhanced.

  At this time, in the present embodiment, the predetermined angle θ is set to θ = 1.5 °, and the upper end edges on both the left and right sides of the inner shade 18c are set to the same height. A light / dark boundary line extending substantially in the horizontal direction can be formed at the upper ends of the light patterns PA and PB. As a result, the lane mark LM1 on the road shoulder side and the lane mark LM3 on the opposite lane side can be illuminated substantially uniformly from the short distance area to the far distance area, and the far road shoulder portions on both sides of the road surface ahead of the vehicle can be illuminated brightly. .

  In the present embodiment, since the plurality of reflecting elements 20s formed in the upper reflecting region 20a1 on the reflecting surface 20a extend in a direction substantially orthogonal to the boundary line L, the reflected light from these reflecting elements 20s is used. It is possible to easily align the positions of the upper ends of the formed light distribution patterns. As a result, each of the two substantially spot-like light distribution patterns PA and PB constituting the light distribution pattern PR for running in rainy weather has a brighter and darker boundary line at its upper end and is in the vicinity of the bright and dark boundary line. It can be formed as a light distribution pattern with a brighter portion. Therefore, also in this respect, the far road shoulder portions on both sides of the road surface ahead of the vehicle can be illuminated brightly.

  In the above embodiment, the reflecting surface 20a of the reflector 20 has a symmetrical outer shape, and is reflected by reflected light from the first to third regions Z1R to Z3R on the right side in the upper reflecting region 20a1 of the reflecting surface 20a. Since the light distribution pattern PA on the own lane side is formed, and the light distribution pattern PB on the opposite lane side is formed by the reflected light from the first to third regions Z1L to Z3L on the left side thereof, These two light distribution patterns PA and PB are formed with substantially the same brightness.

  It is the lane mark LM1 that extends along the shoulder on the own lane side that is particularly required to be irradiated by the light distribution pattern PR for traveling in rainy weather. Therefore, it is possible to form the light distribution pattern PA on the own lane side as a light distribution pattern brighter than the light distribution pattern PB on the opposite lane side among the two substantially spot-shaped light distribution patterns PA and PB. It is.

  For example, in FIG. 2, the reflected light from the third region Z3L among the reflected light from the first to third regions Z1L to Z3L on the left side for forming the light distribution pattern PB on the opposite lane side is shown in FIG. As shown to (a), it can be used in order to form the light distribution pattern PA by the side of the own lane. At this time, if the light distribution pattern Pb3 formed by the reflected light from the third region Z3L is formed at the position of the light distribution pattern Pa3, the light distribution pattern PA illuminates the far road shoulder brightly. It can be.

  In addition, the reflecting surface 20a of the reflector 20 is not symmetrical and has an outer shape extending long toward the opposite lane as shown in FIG. 5B, and the right third region Z3R is formed to extend rightward. It is also possible. By doing so, the light reflected from the third region Z3R can include the light reflected at a position further away from the low beam filament 18a. As a result, the light distribution pattern Pa3 formed by the reflected light from the third region Z3R can be a light distribution pattern that illuminates the far road shoulder more brightly.

  In the above embodiment, the predetermined angle θ, which is the upward inclination angle of the central axis Ax1 of the H4 halogen bulb 18, is described as being set to θ = 1.5 °. However, by changing the predetermined angle θ, In addition, it is possible to change the inclination angle of the bright / dark boundary line at the upper end of each of the two substantially spot-like light distribution patterns PA and PB constituting the light distribution pattern PR for traveling in rainy weather.

  At this time, if the predetermined angle θ is slightly larger than θ = 1.5 °, the light distribution pattern PRo shown in FIG. 4B is deformed like the light distribution pattern PRo shown in FIG. The pair of left and right boundary lines PRo1 at the upper end is inclined so that both the left and right sides hang down with respect to the horizontal direction. If the predetermined angle θ is further increased, the light distribution pattern PRo shown in FIG. 4 (f) is deformed, and the pair of left and right light / dark boundary lines PRo1 at the upper end thereof are further inclined. .

  Then, when the rain-light traveling light distribution pattern PR is formed based on the light distribution pattern PRo shown in FIG. 4D, two substantially spot-shaped light distribution patterns PA, as shown in FIG. PB can be formed as a slanted light-dark boundary line at its upper end. Further, when the rain-light traveling light distribution pattern PR is formed based on the light distribution pattern PRo shown in FIG. 4 (f), as shown in FIG. 4 (e), two substantially spot-shaped light distribution patterns PA, The PB can be formed as a lighter and darker boundary line at the upper end of the PB.

  By the way, a headlamp can be constituted by combining the vehicular illumination lamp 10 according to the above-described embodiment with a lamp for forming a low beam light distribution pattern. Are provided on the left side and the right side, respectively.

  Therefore, the vehicle illumination lamp 10 is provided on the left and right sides of the front end of the vehicle, respectively, and the upward inclination angle of the central axis Ax1 of the H4 halogen bulb 18 is the left vehicle illumination lamp 10. If the vehicle lighting lamp 10 on the right side is set to a value different from each other, the following effects can be obtained.

  That is, as described above, it is the lane mark LM1 on the shoulder side that needs to be irradiated with the light distribution pattern PR for running in rainy weather, but from the position of the vehicular illumination lamp 10, the road surface in front of the vehicle is seen through. When viewed, the lane mark LM1 is a straight line extending obliquely upward toward HV. In this case, the inclination angle of the straight line is different from each other because the distance in the vehicle width direction to the lane mark LM1 is different between the left vehicle illumination lamp 10 and the right vehicle illumination lamp 10.

  Specifically, in the case of left-hand traffic, the inclination angle of the lane mark LM1 becomes small as shown in FIG. 4C with reference to the position of the right-side vehicle illumination lamp 10, and the left-side vehicle illumination lamp When the position of 10 is used as a reference, the inclination angle of the lane mark LM1 increases as shown in FIG.

  Therefore, when emphasis is given to the irradiation of the lane mark LM1 on the roadside by the light distribution pattern PR for running on rainy weather, the vehicle illumination lamp 10 on the right side is used for running on rainy weather as shown in FIG. In addition to forming the light distribution pattern PR, the vehicle lighting device 10 on the left side may be configured to form a light distribution pattern PR during rainy travel as shown in FIG.

  The light distribution pattern PA on the own lane side in the light distribution pattern PR for rainy travel shown in FIG. 4C extends from the vicinity of HV to the lower left with a small inclination angle from the vicinity of HV. By doing so, the lane mark LM1 having a small inclination angle can be efficiently irradiated.

  In addition, the light distribution pattern PA on the own lane side in the light distribution pattern PR for rain traveling shown in FIG. 4E extends from the vicinity of HV to the lower left with a large inclination angle from the vicinity of HV. However, by doing so, the lane mark LM1 having a large inclination angle can be efficiently irradiated.

  In addition, in the rain-light traveling light distribution pattern PR shown in FIG. 4C, the light distribution pattern PB on the opposite lane side has a light-dark boundary line at its upper end extending downward from the vicinity of HV with a small inclination angle. However, by doing so, it is possible to efficiently irradiate the lane mark LM3 on the opposite lane side with a small inclination angle (having a slightly larger inclination angle than in the case of FIG. 4A).

  Further, in the rain-light traveling light distribution pattern PR shown in FIG. 4 (e), the light distribution pattern PB on the opposite lane side is set to the position of the upper end of the three light distribution patterns Pb1, Pb2, and Pb3 constituting the same. Although it is formed by shifting the position of the light / dark boundary line in a state aligned with the H line, by doing so, the lane mark LM3 on the opposite lane side with a small inclination angle is relatively efficient. I can irradiate well.

  By the way, when the vehicular illumination lamp 10 according to the above embodiment is combined with a lamp for forming a low beam light distribution pattern, a short distance region of the vehicle lane on the road surface in front of the vehicle is used as the low beam light distribution pattern. If a light distribution pattern that becomes relatively dark is adopted, the combined light distribution pattern of the low beam light distribution pattern and the rain light distribution pattern PR should be more suitable for rainy weather travel. Can do.

  Moreover, in the said embodiment, the reflector unit 116 as shown to Fig.6 (a) or the reflector unit 216 as shown to FIG.6 (b) is employ | adopted instead of the reflector unit 16 of the illumination lamp 10 for vehicles. It is also possible.

  The reflector unit 116 shown in FIG. 6A has a configuration in which a surface treatment A is applied to the upper reflection region 20a1 on the reflection surface 20a of the reflector 20 so that the reflected light from the upper reflection region 20a1 becomes blue light. It has become. At this time, the surface treatment A is applied to the entire upper reflection region 20a1.

  FIG. 7 shows a light distribution pattern PR for running on rainy weather formed on the virtual vertical screen from the vehicular illumination lamp 10 provided with the reflector unit 116, for a low beam formed by irradiation light from other lamps (not shown). It is a figure shown transparently with the light distribution pattern PL.

  As indicated by a two-dot chain line in the figure, the low beam distribution pattern PL is a left light distribution pattern, and has a cutoff line composed of a horizontal cutoff line CL1 and an oblique cutoff line CL2 at the upper edge thereof. is doing. At that time, the horizontal cutoff line CL1 is formed on the opposite lane side with respect to the VV line which is a vertical line passing through HV, while the diagonal cutoff line CL2 is connected to the horizontal cutoff line CL1 and VV. It is formed so as to rise obliquely upward (for example, rise at 15 °) from the intersection with the line toward the own lane. And the elbow point E which is an intersection of the horizontal cut-off line CL1 and the oblique cut-off line CL2 is located about 0.5 to 0.6 ° below HV.

  The low-beam light distribution pattern PL is formed by irradiation with white light, whereas the rain-light traveling light distribution pattern PR is formed by irradiation with blue light.

  By adopting the reflector unit 116 shown in FIG. 6A as described above, the lane marks LM1, LM2, and LM3 formed in white are irradiated with blue light, so that the visibility can be improved. it can. At that time, the light distribution pattern PR for driving in rainy weather irradiates only the portions of the lane marks LM1, LM2, and LM3 with the blue light on the road surface in front of the vehicle. Can not be. Moreover, if the light distribution pattern PR for rainy weather travel is formed not only during rainy travel but also during normal travel after adopting such a configuration, the visibility of the lane marks LM1, LM2, and LM3 is improved. It can be further increased.

  In this case, instead of a configuration in which the surface treatment A is applied to the entire upper reflection region 20a1, a configuration in which the surface treatment A is applied to only a part of the upper reflection region 20a1 may be employed.

  On the other hand, the reflector unit 116 shown in FIG. 6B is an outer peripheral surface of a portion of the glass tube 18d of the H4 halogen bulb 18 that transmits light from the low beam filament 18a toward the upper reflection region 20a1 of the reflection surface 20a of the reflector 20. In addition, a surface treatment B for converting the light transmitted through the portion into blue light is provided in a cylindrical shape. At this time, the surface treatment B is performed over a range where substantially all the light traveling toward the upper reflection region 20a1 can be converted into blue light.

  Even in the case of adopting such a configuration, the rain distribution light distribution pattern PR as shown in FIG. 7 is formed, so that the lane marks LM1, LM2, and LM3 formed in white are irradiated with blue light. Therefore, the visibility can be improved. At that time, the light distribution pattern PR for driving in rainy weather irradiates only the portions of the lane marks LM1, LM2, and LM3 with the blue light on the road surface in front of the vehicle. Can not be. Moreover, if the light distribution pattern PR for rainy weather travel is formed not only during rainy travel but also during normal travel after adopting such a configuration, the visibility of the lane marks LM1, LM2, and LM3 is improved. It can be further increased.

  In this case, instead of the surface treatment B being applied to the outer peripheral surface of the portion of the glass tube 18d through which almost all light from the low beam filament 18a toward the upper reflection region 20a1 is transmitted, the low beam filament 18a is used. It is also possible to adopt a configuration in which the surface treatment B is applied to the outer peripheral surface of the portion through which a part of the light traveling toward the upper reflection region 20a1 is transmitted.

  In addition, the numerical value shown as a specification in the said embodiment is only an example, and of course, you may set these to a different value suitably.

  Moreover, in the said embodiment, although the structure of the vehicle illumination lamp 10 used by the left-hand traffic was demonstrated, if this vehicle illumination lamp 10 is made into a symmetrical structure, this shall be suitable for a right-hand traffic. be able to.

DESCRIPTION OF SYMBOLS 10 Vehicle lighting fixture 12 Translucent cover 14 Lamp body 16, 116, 216 Reflector unit 18 H4 halogen bulb 18a Low beam filament 18b High beam filament 18c Inner shade 18d Glass tube 20 Reflector 20a Reflective surface 20a1 Upper reflective area 20a2 Lower reflective area 20b Opening 20s Reflective element A, B Surface treatment Ax Reflector optical axis Ax1 H4 Halogen bulb central axis CL1 Horizontal cut-off line CL2 Oblique cut-off line E Elbow point HZ, HZe Hot zone L Boundary line LM1 Roadside lane mark LM2 Center Line lane mark LM3 Opposite lane side lane mark PA, PB Almost spot-like light distribution pattern Pa1, Pa2, Pa3, Pb1, Pb2, Pb3, Pc , Pc2, Pc3, Pd1, Pd2, Pd3 Light distribution pattern PC, PD, PE Light distribution pattern PH High beam light distribution pattern PL Low beam light distribution pattern PR Rain distribution light distribution pattern PRo Light distribution pattern PRo1 Light / dark boundary line Z1L , Z1R first region Z2L, Z2R second region Z3L, Z3R third region

Claims (8)

A vehicle illumination lamp configured to be able to selectively form a light distribution pattern for running on rainy weather and a light distribution pattern for high beam,
An H4 halogen bulb and a reflector that reflects light from the H4 halogen bulb forward;
When the low beam filament of the H4 halogen bulb is lit, the light distribution pattern for running in the rain is formed, and when the high beam filament of the H4 halogen bulb is lit, the high beam light distribution pattern is formed. Configured,
A plurality of reflecting elements are formed on the reflecting surface of the reflector,
By combining light from the low beam filaments reflected by each of the plurality of reflective elements, two substantially spot-shaped light distribution patterns are formed at positions separated from each other in the left-right direction as the light distribution pattern for running on rainy weather. It is comprised so that it may carry out, The vehicle illumination lamp characterized by the above-mentioned.   Of the two substantially spot-shaped light distribution patterns, the light distribution pattern on the own lane side is formed as a light distribution pattern brighter than the light distribution pattern on the opposite lane side. Item 1. A vehicle illumination lamp according to Item 1.   The said H4 halogen bulb is arrange | positioned in the state which made the center axis | shaft of this H4 halogen bulb upward predetermined angle toward the front with respect to the optical axis of the said reflector. Vehicle lighting fixtures.   The plurality of reflecting elements are formed so as to extend in a direction substantially orthogonal to a boundary line between a reflecting region where light from the low beam filament is incident on the reflecting surface and a reflecting region where the light is not incident. The vehicle lighting device according to any one of claims 1 to 3. The vehicle illumination lamp is provided on each of the left and right sides of the front end of the vehicle,
5. The upward inclination angle of the central axis of the H4 halogen bulb is set to a value different from each other between the left vehicle illumination lamp and the right vehicle illumination lamp. Vehicle lighting fixtures.   6. The vehicular illumination lamp according to any one of claims 1 to 5, wherein the vehicular illumination lamp is configured to form the light distribution pattern for running on rainy weather by irradiation with blue light.   A surface treatment is performed on at least a part of the reflection area on the reflection surface where the light from the low beam filament is incident so that the reflected light from the reflection area is blue light. The vehicular illumination lamp according to claim 6.   In the glass tube of the H4 halogen bulb, at least a part of the outer peripheral surface of the portion through which light traveling from the low beam filament to the reflecting surface is transmitted is subjected to a surface treatment for converting the light transmitted through the portion into blue light. The vehicular illumination lamp according to claim 6, wherein the vehicular illumination lamp is provided.

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