JPH11329010A - Automobile headlight capable of emitting left or right side traveling beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile headlight capable of forming a left or right traveling low beam by simply and instantaneously changing not only the same reflecting surface but also the same type lamp. SOLUTION: In this headlight, a lamp 10 and a reflecting mirror 20 are included and lamp shading bands 13, 14, 17, 18 extend along its axis and occupy intervals in the predetermined angular direction on both sides of its arc. The shading bands 13, 14, 17, 18 are arranged symmetrically with respect to the axis surface. and the reflecting mirror 20 is symmetrical with respect to the plane perpendicular to its axial direction and includes at least one pair of first regions 21, 22 which form a first beam part by horizontal cut and two upward light regions 23b, 24b which form a second beam part forming two different beams by supplementing the first beam part individually and selectively. The lamp 10 and the shading bands 13, 14, 17, 18 select one of the two angular positions capable of directing either of the upward light regions to the light source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to automobile headlights, and more particularly to a new type of headlight that can be used independently of the right-hand traffic direction and the left-hand traffic direction.

[0002]

2. Description of the Related Art An oval headlight which determines a low beam cut by a shade or a light shielding plate disposed in a light path between a substantially elliptical reflecting mirror and a condenser lens has a right-hand traffic. It has already been attempted to make the shape of the shade selectively variable in order to generate a beam for the left hand and a beam for the left hand, respectively.

[0003] However, these methods are of the type constructed using only a single (possibly partially shielded) light source, a reflector and, if necessary, streaks or prisms on the closed glass. Not at all for headlights. This is because in this type of headlight, the shape of the reflector is determined in order to form a beam having a high quality cut in a predetermined traffic direction.

Therefore, passing headlights for left-hand traffic and right-hand traffic must generally have different reflecting surfaces.

[0005] Furthermore, it is nowadays attempted to equip this type of headlight with a discharge lamp, which is known for its much higher luminous intensity and lower power consumption than filaments.

However, this type of light source has a high luminosity and the light emitting arc itself is in the vicinity of a secondary light source which leads to the accumulation of salt in certain areas of the lamp or even reflections on the electrodes, so that some And some of them are solved by a completely unique design of the reflecting surface of the reflector.

Therefore, in such a situation, the characteristics of the reflecting surfaces for left-hand traffic and right-hand traffic are clear.

[0008] Because of these properties, different mold punches and, if necessary, also different casting pots must be used for the two pass molds, so that the cost of tools is of course lower. Get higher.

Furthermore, in order to reduce the emission of interfering light, the light-shielding band provided on this type of lamp depends on whether the lamp is used for a left-handed headlight or a right-handed headlight. It is necessary to provide a discharge lamp that has a special configuration and is therefore dedicated to right-hand traffic or left-hand traffic.

[0010] British Patent 2,296,559 discloses that the emission of interfering radiation to a reflector can be minimized.
A discharge lamp with different types of light-shielding bands is described.

However, this patent does not solve any problems with the special construction of the right-hand and left-hand lamps and the reflector (and possibly glass) respectively.

Furthermore, since the light-shielding band of this patent is only intended to shield the transition surface between the special reflection zones of the mirror, one area of the reflection mirror should not affect the beam formation. In this case, it is not suitable to selectively shield the entire area.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to overcome these disadvantages of the prior art and to provide a lamp of the same type, not only with the same reflecting surface, but with a simple and instantaneous change for left-hand traffic. It is an object of the present invention to propose a headlight which can be used to make the headlight for passing the same as the headlight for passing on the right side. Another object of the present invention is to provide a headlight that can be effectively implemented by using a light-shielding band when it is desired to shield an entire area of an undesired reflector in order to form a predetermined type of beam. is there.

[0014]

SUMMARY OF THE INVENTION To this end, according to a first aspect, the present invention comprises a light source cooperable with a reflector, glass, and a shading strip extending substantially parallel to the axis of the lamp. ,
The light-shielding bands are automobile headlights arranged at predetermined angular intervals on substantially both sides of the arc lamp, and the light-shielding bands are disposed substantially symmetrically with respect to the passage surface of the lamp axis, and Is at least one first beam that is substantially symmetrical with respect to the axial vertical plane of the reflector and is capable of producing a first beam portion defined by a substantially horizontal cut.
And two upwardly facing light beams that can generate a second beam portion that can individually and selectively complement the first beam portion to form two different types of beams, respectively. And the lamp and its shading zone are such that in the first position only one of the upwardly directed areas of light is directed to the light source and in the second position only the other of the upwardly directed areas of light is directed to the light source. In addition, any one of the two angular positions can be selectively taken.

According to the invention, the same lamp and the same reflector can be used for the two types of headlights, so that the cost of the tools required to manufacture these two headlights is reduced. It drops significantly. In particular, the same casting pot and the same mold punching tool can be used for the left-hand and right-hand headlights, and the replenishment of the lamps requires a single reference lamp (and In such cases, only the light shielding plate to be combined) is required.

Preferred, but not limiting, features of the headlight according to the invention are as follows. The first area is located in the area below and above the reflector, respectively, the first and second zones both being directed to the light from the light source, A third and a fourth each including each upward region
Zone. Each upward region of light is cooperable with one end of the associated shading band, producing a beam portion defined by a cut offset from the substantially horizontal cut; The shifted cut is a cut inclined in both directions with respect to the substantially horizontal cut. The lower and upper zones allow light to spread laterally under the substantially horizontal cut; At least a portion of the upward region of the light can shift the light laterally relative to the axis of the reflector; The lamp is mounted on a reflector so as to rotate between said two angular positions; The lamp is attached to the reflector at one of the two angular positions by means of erroneous operation prevention means. -The two types of beams are low beams for left-hand traffic and right-hand traffic.

According to a second aspect, the invention comprises a discharge lamp cooperable with a reflector and glass, the lamp comprising a first light-blocking band extending substantially parallel to its axis, and
A second light-shielding band is located farther from the arc than the first light-shielding band, and the first and second light-shielding bands provide a predetermined area of the reflector with a light-emitting arc of a lamp. An automotive headlight is provided that cooperates to selectively shield, wherein a second shading band is capable of extending the shading implemented by the first shading band at least downwardly, thereby reducing arcing. The predetermined region of the reflecting mirror is similarly shielded from the second light source disposed below.

Preferred, but not limiting, features of this headlight are as follows. A light-shielding plate for direct light arranged in front of the lamp, wherein the second light-shielding band constitutes a single fixing means of the light-shielding plate; The second light-blocking band is capable of passing all of the light sent from the arc and passing over the upper end of each first light-blocking band; The predetermined area of the reflector, in cooperation with the upper end of the first shading band, can itself determine the beam part defined by each particular cut, the lamp and its shading band being One of the regions is completely shielded by first and second light-shielding bands arranged on the corresponding side of the lamp, while the opposite regions are opposed by first and second opposed regions. , And vice versa. The first and second shading zones are configured symmetrically with respect to a plane passing through the axis of the lamp;

Other features, objects and advantages of the present invention will become more apparent from the following detailed description of a preferred embodiment of the invention, given by way of non-limiting example in the accompanying drawings, in which: Would.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG.
(B), with reference to FIGS. 3 and 4, the lamp / passing headlight lamp / discharge lamp 10 and mirror 20;
Mirror device shown.

The lamp 10 includes a generally cylindrical first bulb 11 having a projection at the location of the arc S, as is conventional. The first bulb 11 is surrounded by a cylindrical second bulb 12, and two longitudinal light-shielding bands 13, 14 are formed on the second bulb 12. The light shielding bands 13 and 14
By shielding certain zones of the reflector against the light source, said reflector comprising a slice between the planes of these zones is arranged such that it does not emit interfering radiation above the desired cut. I have.

Similarly, a direct light shade or light-shielding plate 15 to be coupled to the lamp is provided, and this light-shielding plate 15 is formed by using two light-shielding legs 17 and 18 in the longitudinal direction to form an area at the bottom of the reflecting mirror. (Preferably directly to the lamp support). The width and position of the shading legs 17, 18 relative to the lamp are suitable such that these legs form similar shading bands that cooperate with the shading bands 13, 14 of the second bulb 12, as described below. Is determined.

The reflector has four zones in this case:
That is, lower zone 21, upper zone 22, and 2
Side zones 23, 24.

These zones are divided by transition planes P13, P14 and P23, P24 passing through the neighborhood, preferably through the optical axis of the reflector.

The lower zone 21 is capable of generating a very wide and homogeneous beam portion from the light source, defined by a substantially horizontal cut at the top.

For this reason, the lower zone preferably comprises a plurality of streaks S21. These streaks S21 spread the light to the sides and can flatten the entire image of the light source so that the uppermost region is almost aligned with the cut.

Specific embodiments of these lines will be described later.

Here, the surface 21 of the lower zone is not dependent on the position of the main light source S, which consists of the arc of the lamp (see FIG. 4), but is advantageously substantially below the arc, within the bulb 11 of the lamp. It is configured in accordance with the position of the second light source S ′ formed by accumulation of circles (see also FIG. 4).

Preferably, the upper zone 22 of the reflector is constructed similarly to the lower zone 21 and has a streak S22 which can spread the light with appropriate homogeneity under a horizontal cut.

However, with respect to the upper zone 22, these various lines S22 are formed according to the position of the main light source formed by the arc of the lamp.

The side zones 23, 24 extend on both sides of the lamp and can complement the beam generated by the lower zone 21 and the upper zone 22, depending on the angular position of the lamp and thus its position relative to the reflector. Thus, a left (left-hand traffic) or right (right-hand traffic) cut is selectively formed.

Since these side zones 23 and 24 are formed symmetrically with respect to the vertical axis plane of the reflecting mirror, only the zone 23 will be described in detail.

The side zone 23 includes two small zones 23
The first sub-zone is adjacent to the lamp, and the second sub-zone extends between the first sub-zone and the side edge of the reflector.

The small zone 231 advantageously comprises a reflecting surface as described in French Patent Publication No. 269146 in the name of the Applicant. This reflecting surface is provided with a light shielding plate (standard lamp <H
4) in cooperation with the front filament type), has the property of acting as a paraboloid of revolution while ensuring horizontal or inclined light spread under the cut.

For details on such reflective surfaces, see the above-mentioned French patent application. Preferably, the surface on which the radiation is converged is selected, but this convergence is adjusted so that the douser 15 of the lamp does not unduly block the amount of light.

The small zone 232 is composed of a paraboloid-shaped basic surface, and projects a light-spreading streak on the basic surface along the cut. Such a projection line is described in French Patent Publication No. 2710393 in the name of the present applicant.

Preferably, these streaks are upper streaks S232h extending perpendicularly above the axial horizontal plane of the reflector, and lower streaks extending below said axial horizontal plane, preferably with respect to the vertical. And a lower muscle S232b having a slope γ of about 15 °.

Therefore, the upper streak S232h can spread the light horizontally, and the lower streak S232b can spread the light with an inclination of about 15 ° with respect to the horizontal light.

Here, the small zone 231 and the small zone 23
The parameterization with the streaks 2 is such that the lateral spread of light on these surfaces is no smaller than the zones 21 and 22 described above.

As already mentioned, the side zones 24 are 2
Small zones 241, 242 and streaks S242h, S24
2b is symmetric with the zone 23.

Advantageously, the half plane separating the zones is:
It is inclined as follows. Half plane of P13, P14: symmetrically, 28 ° below horizontal light (angle β in FIG. 4). P2
3, half-plane of P24: similarly symmetric, 2 on top of horizontal light
5 ° (angle α in FIG. 4).

Next, FIG. 4 shows the arrangement of the lamp 10 and its various light-shielding bands in detail.

The bulb 12 outside the lamp has, as before, two longitudinal light-blocking bands 13,14. In the illustrated position corresponding to the left-handed beam, the light-shielding band 13 arranged on the left has its upper end included in a vertical plane passing through the base of the light-emitting arc, and the upper end of the light-shielding band 14 corresponds to the base of the light-emitting arc. On the surface inclined downward by 15 °.

These two upper ends serve the same role as the two opposite ends of the light-shielding cap of the standard filament lamp << H4 >>.

From the upper ends thereof, two light-shielding bands 13, 1
4 extends downward about the axis of the valve 12 at an angular spacing of about 25 ° and is therefore symmetric with respect to the plane of symmetry PS inclined at 7.5 ° with respect to the axial vertical plane. It is arranged in a way.

The two light shielding bands 17 and 18 are
14 has an angular spread that is positioned as follows. That is, in the position of FIG.
8 are each arranged such that their upper ends do not block any light rays exiting the arc and passing over the upper ends of the corresponding shading bands 13, 14, so that the arc and their upper ends can be cut as desired. To decide. In addition, the lower end of the light-blocking zone 17 is connected to the side zone 2 of the reflector by any light rays from the lamp, and in particular from the circular area S ′.
3 and so on.

By determining the upper ends of the light shielding bands 17 and 18 and the lower end of the light shielding bands 17 in this manner, the light shielding bands 17 and 18 are determined.
18 is dimensioned to be symmetric with respect to the symmetry plane PS.

Thus, the position of the lamp 1 is shifted by 15 ° in the angular direction so as to generate a beam aligned with the right-hand traffic.
When 0 is occupied, the lower end of the light-shielding band 18 plays the same light-shielding role as the lower end of the light-shielding band 17 in the above-described example.

As mentioned many times, a lamp 10 with a light blocking plate 15 can incorporate one of the two stable orientations shown in FIGS. 1 (a), 1 (b) and 4. It is attached to the reflector 20 so that it can be made.

This involves mounting the lamp on a lamp holder which is rotatable between the two extreme stops and moving the lamp holder, for example using a lever, or cooperating with each other on the lamp holder and the reflector. It can be implemented by providing two adjustable play for preventing malfunction which can be installed in any position of the lamp.

Next, the optical operation of the above-described lamp / reflector device will be described in detail at the position shown in FIG. This position corresponds to the orientation shown in FIG. 1 (b) and FIG. 4 which is inclined by 15 ° in the direction opposite to the clock hand in the figure.

As already described, zones 21 and 22
Generates a beam component that spreads over a substantially uniform width by horizontal cutting.

The zone 23 of the reflector is narrower at the position of its area 23b located below the horizontal plane in the axial direction of the reflector than the beam portion at which the zones 21 and 22 are generated. To generate a constant beam portion characterized by determining a half cut inclined at 15 ° in the direction of the clock hand. This half-cut is caused by the restriction to the corresponding value secured by the upper end of the shading band 13 in the angular illumination zone of the arc S in the zone 23.

The beam portion where the zone 24 is generated has the same width as the width where the zone 23 is generated. However, depending on the position of the upper end of the light-shielding band 14, an area 24b located below the horizontal plane in the axial direction of the reflecting mirror is provided. Is shaded. This beam portion is defined by a horizontal cut that substantially merges with the cut of the beam portion generated by zones 21 and 22. Thus, zone 24 immediately enhances the illumination under the horizontal cut, mainly in the travel axis.

The resulting beam is shown in FIG. 2 (a) by a group of isoluminous curves. The beam is particularly suitable for forming a European-type low beam for right-hand traffic, due in particular to a very wide, homogeneous and substantially cut-concentration point shifted to the right with respect to the axis of travel. I understand. Such a shift to the right is caused by the small zone 23 of the reflecting mirror.
2 is secured by adjusting the horizontal contour of the streak S232b projected on the second line. The streak S232b participates in beam formation only in this orientation of the lamp.

Furthermore, the appearance of the beam directly generated by the reflector is such that no intervention is required at the location of the closure glass, which can be substantially smooth or provided only with decorative elements.

When the lamp assumes the positions shown in FIGS. 1B and 4, the area 23b of the zone 23 is the light shielding zone 1
Area 2 of zone 24 on the opposite side, shielded from light by 3 and 17
4b is directed to the arc. Therefore, it can be seen that the beam formed is as shown in FIG. This is particularly applicable to headlights for passing vehicles according to European standards for left-hand traffic. In this case, the shift of the concentration point to the left is caused by the line S242b projected on the small zone 242 of the reflector.
Secured by

It should be noted that the beams shown in FIGS. 2 (a) and 2 (b) are characterized by a range which is limited by a cut which rises to 15 °, and which is used in US and Japanese automobiles. In order to meet lighting standards, it can be used almost as is. If necessary, the orientation and groove profile S232
h, S232b, S242h, and S242b can be adjusted to generate a beam that is primarily horizontal and limited by two half-cuts that are offset from each other in height.

FIG. 5 is a side view of the light-shielding plate 15 and includes a front light-shielding portion 16 and two holding legs 17 and 18 which simultaneously function as a light-shielding band as described above.

The front light-shielding part 16 is provided in a manner known per se, when the height of the reflector is clearly lower than its width.
Except for the upper and lower flanks, which are also present in a conventional manner, it has a rear end configured to allow light from the arc S to reach only the active surface of the reflector.

At a 15 ° inclination of the lamp / shade device,
It can be seen that this trailing edge does not always fit the two cases in the figure. However, in practice, it is easy to find a compromise without degrading the quality of the two beams obtained.

Next, referring to FIGS. 6 and 7, streaks S21 and S21 of the lower zone 21 and the upper zone 22 of the reflecting mirror will be described.
A preferred embodiment of S22 will be described.

First, FIG. 6 shows an orthonormal coordinate system. 0X is horizontal and vertical to the optical axis, 0Y is the optical axis, and 0Z is the vertical axis.

Each zone 21, 22 of the reflector individually defines a plurality of small reflecting zones juxtaposed laterally to one another, ie defined by a boundary extending between the upper and lower ends of each zone. It is constituted by.

The reflection surface Sn of the small zone Zn is generated by determining the horizontal generatrix GHn at the position of this zone. The horizontal bus GHn is configured to ensure a predetermined spread of light in the side direction included between two symmetric or asymmetric boundaries. This horizontal bus may be, in particular, a part of a hyperbola, a part of an ellipse, or a line segment.

Since the reflecting surface is constituted by this bus,
It has an unfocused portion in its vertical cross section. Here, the unfocused portion means a position change of a place where a light beam transmitted from the center of the arc S is reflected on a horizontal plane parallel to the axis 0Y of the reflecting mirror. Thus, in FIG. 6, the upper half of the surface Sn is a completely parabolic cross section Pn, Pn shown by a dotted line for comparison.
has an “upper focus” Fhn different from the focus F of n ′,
The lower half is the "lower focus" which is also different from the focus F
Fbn. "Upper unfocused portion" means the distance measured according to axis 0Y between focal point F and "upper focus" Fh, and "lower defocused portion" is the distance between F and Fb. Corresponding to the distance of

[0067] Both French Patent Publication No. 2536502 and French Patent Publication 235 in the name of the Applicant.
No. 6503 discloses, in particular, a surface having the above-mentioned non-focusing part.

Thus, the reflecting surface Sn to be obtained in the zone Zn can generate an image of the arc, all of which are arranged under one cut and at the same time the image of the image under this cut. Ensure a controlled spread. The horizontal bus is preferably chosen such that this spread is more homogeneous. The non-focusing portion is configured such that the upper focal point Fhn and the lower focal point Fbn of the vertical cross section above and below the plane are at the rear end and the front end of the light source S, respectively,
The image is then aligned with the cut under the cut.

Next, the zones 21 and 22 shown in FIG.
It consists of a continuous process. First, as described above, the central small zone is determined. Preferably, for small zones arranged in the vertical line of the lamp, the parameters, mainly the form of the horizontal bus and the unfocused parts above and below the vertical section of the reflecting surface, are given by the dimensions of the mirror, the width of the beam Determined according to the desired photometric method for the part.

Next, the small zones adjacent to the left and right of the basic small zone, together with their unique parameters (here mainly the shape of the bus and the unfocused parts above and below the vertical cross section), are identified. Depending on the desired positioning of the light projected by the zones, and in particular, such that the reflecting surfaces of these adjacent zones intersect with the reflecting surfaces of the elementary sub-zones according to a transition line having two main features: I do. The reflecting surface must extend from top to bottom between the upper and lower ends of the considered zone 21 or 22; At the location of this transition line, the lateral deflection effected by each reflecting surface must not be constant, but, conversely, must vary regularly along this transition line.

FIG. 7 clearly shows the case where the reflecting surface S1 for determining the basic small zone Z1 is first determined, and the reflecting surface has an appropriate upper defocus portion Fh1 and a lower defocus portion Fh1. It is supported by the horizontal bus GH1 with the portion Fb1.

Next, the reflection surface S2 of the small zone Z2 is determined. This surface is supported by the horizontal generatrix GH2 and has an upper non-focusing portion Fh2 and a lower non-focusing portion Fb2.

By adjusting the position of the horizontal generating line GH2 with respect to the axis 0Y, in the plane X0Y, a dimension X12 appropriately determined for determining a common boundary between the two small zones Z1 and Z2 is determined. With one point, two reflecting surfaces can intersect. As long as the other parameters of the small zone Z2 remain at appropriate limits, the two small zones are actually cut by the transition line LT12. This transition line LT12 has a dimension X1 at the position of the cut plane X0Y.
2 and joins the upper and lower ends of zone 21 or 22.

Preferably, between the small zones Z1 and Z2,
By adjusting the values of the upper and lower defocus portions of each of these zones, the exact trajectory of the transition line LT is constructed at the height of the considered zone.

To this end, several approaches were introduced, mainly the following two: The first approach is to change the focal points Fh, Fb above and below the upper and lower portions of the reflective surface so that the same two first positions and the other smaller ones for one whole small zone. Consists of having the same, two different second locations than the first location for the entire zone. Thereby, the vertical plane X0Z
To observe the transition line LT12, the transition line LT
12 can be gradually bent under control as it moves further left or right above and below the plane XOY. A second approach consists of changing the position of the upper and lower focal points in each sub-zone, rather than continuously in the same sub-zone. Thus, for two adjacent zones, the depths of the small zones can be shifted and adjusted independently of each other, and therefore the corresponding transition lines can be bent independently of each other. Preferably, the change in focus above and / or below within the same small zone is such that the unfocused portion changes linearly depending on the dimension by the X axis.

Further, since each transition between the small zones is formed by the intersection of two surfaces which are substantially non-tangential to each other,
There is no zero order discontinuity between the reflective surfaces of the two zones, but there is a bend at that location. This bend is
When the headlights are turned off, the observer can appropriately distinguish different small zones, which is effective in appearance.

Also, by making the change in the non-focusing part, the transition line LT12 between the small zones Z1 and Z2 will generally follow a more or less curved and meandering trajectory. This trajectory does not merge with the equi-deflection lines on the side of zone Z1 or on the side of zone Z2. as a result,
The width of each small zone gradually changes according to the dimension along the Z-axis, and when moving along the transition line LT12, the transition line 12
The maximum spread of the side surface secured at the position will gradually change. Thus, the sudden interruption of the beam portion generated from each sub-zone is avoided.

Further, the position of the image of the light source on the projection light-shielding plate shifts upward or downward due to the change in the upper and lower non-focusing portions. In this case, the beam portion to be formed must keep a generally horizontal cut, of course, the modification of the defocused portion such that this cut is kept with a certain clarity and continues to be determined Select This controlled unfocused portion can be used to adjust the distribution of light in the direction of the beam thickness, as described below.

The configuration of each of the zones 21 and 22 is continued by determining a small zone Z3 adjacent to the small zone Z2, as in the above-described embodiment. This small zone Z3 is
On the XY plane, it is parameterized to obtain a curved transition line LT23 extending to the desired dimension X.

These steps can be repeated as many times as necessary zones in the left and right portions of the reflector.

The components of the beam generated by the various sub-zones formed by zones 21 and 22 thus fuse, with appropriate homogeneity, into the wide beam portion that maintains a horizontal cut.

Of course, the present invention is not limited to the above-described and illustrated embodiments, and those skilled in the art will recognize that various modifications or alterations can be made within the technical scope thereof.

Although the present invention has been described with reference to a discharge lamp incorporating two light-shielding bands having predetermined positions and widths, the present invention can be applied to any other arrangement of the light-shielding bands suitable for the configuration of the reflector. The same can be applied to a lamp having the same.

[Brief description of the drawings]

FIG. 1 (a) is a schematic rear view of the reflector and mirror device according to the invention at a first mutual position where a low beam for right-hand traffic is obtained, and FIG. 1 (b) is for left-hand traffic. FIG. 4 is a schematic rear view of the same reflector and the same lamp at a second mutual position where a low beam is obtained.

FIG. 2 (a) shows the structure shown in FIG.
1A is an isometric curve diagram showing the appearance of a low beam generated by the reflector / lamp apparatus of FIG. 1B, and FIG. 1B is a view of the reflector / lamp apparatus of FIG. FIG. 7 is an isoluminous curve diagram showing the appearance of a generated low beam.

FIG. 3 is a detailed rear view of a reflector according to a preferred embodiment of the present invention.

FIG. 4 is a partially enlarged rear view of the reflector / lamp device of FIGS. 1 (a) and 1 (b).

FIG. 5 is a side elevational view of a light shielding plate equipped with the reflector / lamp device of FIGS. 1 (a), 1 (b) and 4;

FIG. 6 shows specific structural modes of some reflecting surfaces of the reflecting mirror of FIG. 3;

FIG. 7 shows specific structural modes of some reflecting surfaces of the reflecting mirror of FIG. 3;

DESCRIPTION OF SYMBOLS 10 Lamp 11 First bulb 12 Second bulb 13, 14 Light-shielding band 15 Light-shielding plate 16 Front light-shielding portion 17, 18 Light-shielding band 20 Reflector 21 Lower zone 22 Upper zone 23, 24 Side zone P13, P14, P23, P24 Transition surface S21, S22 Line 231, 232 Small zone S232h Upper line S232b Lower line PS Symmetry plane ZN Small zone SN Reflecting surface GHn, GH1 Horizontal bus Pn, Pn 'Parabolic section F Parabolic section Sectional focus F
hn Upper focus Fbn Lower focus Fb1 Lower defocused portion Fh1 Upper defocused portion LT12 Transition line

Claims (14)

[Claims] A light source (1) cooperable with a reflector (20).
0), glass, and a light-shielding band (13, 14, 17, 18) extending substantially parallel to the axis of the lamp, and the light-shielding bands are arranged on both sides of the arc at predetermined angular intervals. A headlight for an automobile, wherein a light-shielding band is arranged substantially symmetrically with respect to a passing plane of an axis of a lamp (10), and a reflecting mirror (20) is substantially arranged with respect to a vertical plane in an axial direction of the reflecting mirror. To form at least one first region (21, 22) that is symmetrical and can generate a first beam portion defined by a substantially horizontal cut, and two different types of beams, respectively. To
The lamp and its light-shielding band comprise two facing light upward regions (23b, 24b) capable of generating a second beam portion capable of individually and selectively complementing said first beam portion. In a first position, only one of the upward regions of light is directed to the light source, and in a second position, only one of the upward regions of light is directed to the light source. Headlights that can be selectively adopted. 2. The method according to claim 1, wherein the first region is arranged in a region below and a region above the reflecting mirror, and the first and second zones are both directed to light from a light source.
2, 1 and 22) and third and fourth zones (23, 24) arranged on the side and each including a respective upward region (23b, 24b) of light. The described headlight. 3. Each upward region of light (23b, 24b).
3. The device of claim 1 or 2, wherein said beam is cooperable with one end of the associated light-shielding band (13, 14) and generates a beam portion defined by a cut offset from said substantially horizontal cut. The described headlight. 4. The headlight according to claim 1, wherein the shifted cut is a cut inclined in both directions with respect to the substantially horizontal cut. 5. The lower and upper zones (21, 2).
The headlight according to any one of claims 1 to 4, wherein 2) spreads the light to the side under the substantially horizontal cut. 6. The upward region of the light (23b, 24b).
The headlight according to any one of claims 1 to 5, wherein at least a part of the headlight can shift light to the side with respect to the axis of the reflecting mirror. 7. The lamp according to claim 1, wherein the lamp is mounted on the reflector so as to rotate between the two angular positions. Headlights. 8. A lamp according to claim 1, wherein the lamp is mounted on the reflector at one of the two angular positions by means of an erroneous operation preventing means. The described headlight. 9. The low beam for left-hand traffic and right-hand traffic for the two types of beams.
8. The headlight according to any one of 8 above. 10. The light-emitting arc (S) includes a reflecting mirror (20).
A discharge lamp (10) cooperable with the lamp, the lamp comprising a first light-shielding band (13, 14) extending substantially parallel to its axis and the light-emitting arc more than the first light-shielding band. From the second light-shielding band (1
7, 18), wherein the first and second shading strips are automotive headlights that cooperate to selectively shield the arc against a predetermined area (23b, 24b) of the reflector. In addition, the second light-shielding bands (17, 18) correspond to the first light-shielding bands.
The shading provided by the shading strips (13, 14) can be extended at least downwardly, so that for a second light source (S ') arranged below the arc, the predetermined light of the reflecting mirror A headlight characterized in that it also covers an area. 11. A light shielding plate (15) located in front of a lamp, said second light shielding band (17, 18).
11. The headlight according to claim 10, wherein the light source constitutes a single fixing means for the light shielding plate. 12. The second light-shielding band (17, 18),
Headlight according to claim 10 or 11, characterized in that the entire light sent from the arc and passing over the upper end of each first shading strip (13, 14) can be passed. 13. The predetermined area (23b, 2b, 2b) of the reflecting mirror.
4b) itself can determine, in cooperation with the first light-shielding band (13, 14), the beam part defined by a particular cut, respectively, and the lamp and its light-shielding band are positioned in the angular direction. On the other hand, one of the regions is entirely shielded by first and second light-shielding bands arranged on the corresponding side of the lamp, and the opposite region is provided by opposed first and second light-shielding bands. 2. The method according to claim 1, characterized in that the light is partially shielded by, and vice versa.
The headlight according to any of 0 to 12. 14. The headlight according to claim 10, wherein the first and second light shielding plates are configured symmetrically with respect to a plane passing through the axis of the lamp. .