ES2201159T3 - AUTOMOTIVE VEHICLE HEADLIGHT THAT INCLUDES MEANS OF HIDDEN OF THE PARASITE LIGHT AND LAMP PROVIDED WITH SUCH MEANS OF HIDDEN. - Google Patents

Abstract

A CAR VEHICLE HEADLIGHT INCLUDES A LAMP (10) THAT CARRIES A BULB (12) IN WHICH A LIGHT SOURCE IS FORMED, AND IN WHICH CONNECTION OR SUPPORT MEDIA ARE ASSOCIATED (17) EXTENDING OUTSIDE THE BULB AND TO THE HEIGHT OF THE SOURCE, A MIRROR (20) IN WHICH THE LAMP IS RECEIVED, AND A CLOSING GLASS. THE LAMP TAKES NEAR THE BULB AT LEAST ONE SCREEN (12A, 12B) INTENDED TO HIDE A RADIATION PART FROM THE SOURCE AND THAT WOULD BE DIRECTED TOWARDS A CERTAIN REGION OF THE MIRROR, SO AS TO CREATE A HOMOLOGICAL SHADOW AREA (Z1, Z2 ). ACCORDING TO THE INVENTION ,, AN OCULTADOR (13A, 13B) IS DESIGNED TO MASK A HOMOLOGICAL REGION OF THE MIRROR IN FRONT OF A PARASITE LIGHT SOURCE (S '') CONSTITUTED BY THE REFLECTION OF THE LIGHT FROM THE SOURCE ON SUCH MEANS OF CONNECTION OR SUPPORT (17). THE INVENTION PROPOSES ALSO A LAMP FOR SUCH LIGHTHOUSE.

Description

Automotive vehicle headlight comprising means of concealment of the parasitic light and lamp provided with said means of concealment.

The present invention relates in a manner general to car headlights equipped with lamps Download

Classically, a lighthouse is equipped with a filament lamp powered by direct current provided by the vehicle's battery.

They have developed recently, especially intended for headlights of motor vehicles, lamps discharge, which require ignition and power circuits specific, but that have the advantage that, with the same power, generate a luminous flux much higher than that generated by a incandescent filament.

On the other hand, one of the main problems in the conception of a car headlight intended to emit a clean cutting beam, that is not susceptible to dazzle drivers of vehicles moving in the opposite direction, it is more complicated with this type of source.

Different techniques are already known to form a clean cutting beam. One of these techniques is to associate the source a cup that hides a part of the mirror, but then it loses a significant amount of the luminous flux (especially in the case of a standard lamp "H4").

Another technique is to go to a mirror of specific conception, suitable for generating a beam of clean cut.

Moreover, it is also known to put in front from the source a shield destined to hide the light emitted by the source directly towards the headlight glass (light "direct").

This shield is conceived simply in function of the source, without considering any parasitic sources produced by the reflection of the radiation coming from the source Main in adjacent parts of the lamp.

These adjacent parts can be especially you leave a discharge lamp, or its electrodes, and even, and more annoyingly, the ceramic sleeve surrounding a conductor lamp supply located outside the bulb, usually under this one. A major drawback of these sources parasites lies in the fact that in cooperation with the mirror, the most of the time they will generate light in considerable quantity above the cut sought. This problem also occurs in lamps type "HIR".

A known solution to this problem, as described in US-A-4 271 459, consists in resorting to simple side concealers whose size is determined so as to ensure concealment of the light coming of the parasitic source formed by the quartz shell or bulb of the lamp.

The present invention proposes to solve this same kind of inconvenience in the framework of a lamp capable of present parasitic sources and that in itself means means to hide a part of the radiation coming from the source in direction towards certain parts of the mirror, being able to understand these means especially two opaque bands in the form of bands provided in the bulb and intended to favor obtaining a clean cut. A particular type of these concealment bands especially appears in the document CH-A-487 366, which also discloses the preamble of claims 1 and 4.

The present invention proposes more specifically a new shield or concealment device that reduces a part substantial glare due to parasitic sources cited, causing a minimum reduction of the effective flow, effectively participating in the formation of the light beam.

Thus, the present invention proposes, according to a first aspect, a car vehicle headlight as defined in the claim 1.

According to a second aspect, the invention proposes a lamp for the headlight of a motor vehicle as defined in the claim 4.

Certain preferred aspects, but not limiting, of the present invention are defined in the dependent claims.

Other aspects, objects and advantages of this invention will stand out by reading the following description detailed of a preferred embodiment thereof, given to non-limiting example title and made with reference to the drawings annexes, in which:

- Figure 1 is a vertical section view axial part of a headlight of a motor vehicle equipped with a conventional gas discharge lamp;

- Figure 2 is a schematic front view and partial of the lighthouse of figure 1;

- figure 3 is a view analogous to figure 2, showing a lamp equipped according to the present invention;

- Figure 4 is a schematic view in perspective of a lamp equipped according to the present invention;

- Figure 5 is a partial sectional view vertical of a headlamp according to another embodiment;

- Figure 6 is a perspective view of the lamp-concealment headlight assembly figure 5;

- Figure 7 is a view of the left of the concealment piece of figure 6;

- Figure 8 is a front view of the piece of concealment of figure 6;

- Figure 9 is a view of the right of the concealment piece of figure 6; Y

- Figure 10 is a top view of the concealment piece of figure 6.

However, the embodiment according to the Figures 5 to 10 is not part of the present invention.

A beacon of motor vehicle with a gas discharge lamp 10 mounted on a mirror 20.

The lamp behaves, in a bulb or cover of glass 12 generally cylindrical, coaxial with the optical axis x-x of the mirror, two electrodes 14a, 14b between which can be turned on and maintained, by proper electrical control, a luminous electric arc that constitutes the light source S of the lighthouse.

The anterior electrode 14b is connected to the lampholder 15 of the lamp by a conductor 16 which involves a descending branch 16a and a generally horizontal branch 16b, which extends below and parallel to the x-x axis, to the lamp holder.

This horizontal branch of conductor 16 is surrounded by a ceramic sleeve 17, in a classic way.

The lamp 10 also includes a shield of direct light 18 coupled to the lamp holder 15 of the lamp by a adequate support (not shown) treated in a way that minimizes the parasitic reflections on this one.

With reference now to figure 2, it is observed that the bulb 12 of the lamp, in a classical manner, involves two opaque parts 12a, 12b intended to hide the radiation from from source S and that would go to two specific parts of the mirror. These opaque parts are here shaped like bands that extend parallel to the axis of the lamp, and are made preferably applying an opaque paint to the bulb.

In the present embodiment, one of these Z1 parts covers, to the left of the lamp facing it, a sector between a horizontal half plane P1 and a half plane P2 inclined at 25º below the horizontal. The other of these parts Z2 covers, to the left of the lamp facing it, a sector between a half-plane P3 inclined 15º below the horizontal and a half-plane P4 inclined 40º below the horizontal. This mode of particular realization logically should not be considered as limitative.

The mirror 20 is in this case a mirror capable of produce by himself, without the intervention of the cup, a beam of European standardized crossing, for a specific conception as describes in a number of previous patents in the name of the Applicant.

It should be specified that the concealment made by the bands 12a, 12b is intended to improve the light beam produced by the mirror, dimming the light in certain parts of the beam and especially susceptible light, due to imperfections of the reflective surface, protrude above the cut.

It will also be observed here that the form of particular realization of the mirror should not be considered as limiting

Also shown in Figure 2 is the conductor 16b provided with its sleeve 17. The reflection of the light from the source S in this sleeve makes it a parasitic light source S ', which illuminates mostly towards up and sideways. This parasitic source, in cooperation with the mirror is susceptible - due to its position below the source S- of give rise to a non-negligible amount of light in the beam above the cut sought.

Such a lamp can also give place to other types of parasitic sources, and especially to a source S '' together with the presence of salts inside the cover 12 or electrodes 14a, 14b.

Now, with reference to figure 3, it has represented a lamp according to the invention, to which they have associated two concealrs whose vocation is to intercept a substantial part of the radiation from the parasitic source and that would go to the mirror, and that have as characteristic which are located in the two shadow parts Z1 and Z2 caused by the opaque bands 12a, 12b. In this way, these concealers do not influence on the light emitted by the source S, and therefore on the beam generated by the mirror from the aforementioned source. Further, hiding most of the radiation diffused by the source parasitic and susceptible to reach the mirror, prevent this radiation generated in the beam of light above the cut.

The concealers are in this case in the form of flat plates 13a, 13b, for example metallic, extending substantially radially from bulb 12 in an extension by less equal, and preferably greater, to that of the parasitic source S '.

Preferably, as illustrated in the figure 3, these plates do not extend rigorously radially, but rather are inclined, from the inside to the outside, of the limit plane upper part of the part considered towards the lower limit plane.

As illustrated in Figure 4, the concealers 13a and 13b may be fixed in place by becoming solidary of the direct light shield 18 (for example soldiers or crimped), presenting projections 131a, 131b that extend the aforementioned concealers forward at a certain distance at one and the other part of the shield.

Advantageously, the underside of the concealment plates 13a, 13b involves a lining that absorbs the light (matte or analogous black paint). According to a variant of embodiment not shown, concealers 13a, 13b may be fixed directly on the lamp holder 15 of the lamp.

According to another variant, as will be described in detail below, they are the concealers themselves 13a, 13b those that constitute means of mounting the direct light shield 18 in the lampholder, in which case the concealers are in solidarity with the lampholder at its rear end and solidary shield 18 in its front end

Moreover, the invention applies generally to any type of lamp that behaves, outside the bulb, one or more elements, especially electrodes, liable to constitute parasitic sources, and especially covers the lamps called "HIR" (Halogen Infra Red, in which the globe of the retroreflective lamp emitted infrared radiation by the filament towards this same filament to increase the light excitation.

It has been represented in figures 5 to 10 another embodiment, which however is not part of the present invention

In these identical figures, elements or parts or similar to those of the previous figures are designated in the as much as possible with the same reference signs, and not will systematically describe again.

This lighthouse comprises a concealment piece that it includes a part that forms a direct light shield 18 with a wall domed top 181, two vertical side walls 182, 183, a horizontal bottom wall 186 and a front wall 187. Two beveled parts 184, 185 ensure the transition between the parts Side and bottom wall.

The edges of the upper, lower and sides opposite the front wall have a type of geometry that the radiation coming from the lamp reaches only the useful parts of the mirror 20.

According to this embodiment, the concealers 13a, 13b whose function is identical to that of the described concealers with reference to figures 3 and 4, they constitute at the same time the fixing means of part 18 forming a light shield directly on the mirror 20, although no part is necessary additional fixing such as leg, stringer, etc ..., liable to reduce the light output and / or generate a parasitic radiation

In this embodiment, each concealer 13a, 13b has the shape of a leg that extends in a plane vertical and that behaves at its rear end:

- an extension of approximately 90º towards the outside, respectively 131a, 131b;

- a prolongation backwards, noticeably parallel to concealrs 13a, 13b, and designated respectively by 132a, 132b; Y

- a final extension at approximately 90º outwardly, respectively 133a, 133b.

These extensions are suitable for block, after elastic deformation for placement, in two openings 21a, 21b formed in the mirror 20 to one and the other part of the lamp hole.

It will be noted here that the lamp placement in the lamp hole can be used either to make sure mounting the concealment piece in the mirror, either for confirm the assembly carried out for example as described previously, in this case exerting radially support towards the outside at the level of extensions 132a, 132b and make a adequate axial draft, to avoid any risk of unlock

You can also provide a fixation of the piece concealed in the mirror by screwing, hook by means of claws, etc ...

You can also mount the concealment piece directly in the lamp holder 15 of the lamp.

Figure 8 shows the angular arrangement of the concealers 13a, 13b so that they fit well in the shadow parts created by the opaque parts 12a, 12b of the bulb.

Logically, parts 13a and 13b of the piece of concealment may in variant be oriented not vertically but with an oblique inclination, as in the case of figures 3 and Four.

Logically, the present invention is not limited to the embodiments described and represented, but the technician will know how to contribute any variant or modification according to the attached claims.

Claims (6)

1. Headlight of a motor vehicle of the type comprising a lamp (10) that comprises a bulb (12) inside which a light source (S) is formed, and connection or support means (17) extending to the outside of the bulb substantially in front of the source, a mirror (20) in which the lamp is housed, and a closing glass, the lamp with at least one screen (12a, 12b) intended to hide a portion of the radiation coming from the source and that would be directed towards a certain area of the mirror, to generate in this way a part of homologous shadow (Z1, Z2), the lighthouse being characterized by the fact that the lamp is of the type of discharge involving a shield of direct light (18) in front of the source, due to the fact that the headlamp comprises in the aforementioned shadow part, a concealer (13a, 13b) intended to hide a homologous part of the mirror in front of the parasitic light source (S ') constituted by the reflection of the light coming from d and the source in a protective sleeve (17) of a conductor outside the bulb of the discharge lamp, and by the fact that the concealer (13a, 13b) are integral with the direct light shield (18) and constitute fixing means of said shield in the lamp holder (15) of the lamp. 2. Headlight according to claim 1, wherein the lamp bulb comprises two opaque parts (12a, 12b) that form screens, in the form of bands generally parallel to the axis (xx) of the headlamp emission and which creates two parts of shade (Z1, Z2) that generally extend laterally with respect to the lamp, and in which said parasitic source (S ') is located below the source, characterized by the fact that it comprises two plate-shaped concealers ( 13a, 13b) which generally extend radially in the shadow portions (Z1, Z2) of said opaque bands. 3. Headlamp according to claim 2, characterized in that the said plate-shaped concealers (14a, 14b) extend inclined downwards to one and another part of the lamp. 4. Lamp (10) for the headlight of a motor vehicle, of the type that involves a bulb (12) inside which a light source (S) is formed, and at least an opaque part (12a, 12b) extending near the bulb and intended to hide a part of the radiation coming from the source and that would be directed towards a certain area of an associated mirror, in order to create a part of homologous shadow (Z1, Z2), the lamp being characterized by the fact that it is of the discharge lamp type that includes connection or support means comprising a protective sleeve (17) surrounding a conductor that extends outside the bulb substantially in front of the source, and a direct light shield (18 ) in front of the source, due to the fact that the lamp comprises in the aforementioned shade part, a concealer (13a, 13b) intended to intercept a significant part of the radiation from a parasitic light source (S ') constituted by the reflection of the lu z originating from the source on the sleeve (17), and by the fact that the concealer (13a, 13b) are integral with the direct light shield (18) and constitute fixing means of said shield in the lamp holder ( 15) of the lamp. 5. Lamp according to claim 4, whose bulb comprises two opaque parts in the form of bands (12a, 12b) generally parallel to an axis of the lamp and suitable for generating two shadow portions (Z1, Z2) that generally extend laterally with with respect to the lamp, characterized by the fact that the parasitic source (S ') is located below the source (S), characterized by the fact that it comprises two plate-shaped concealers (13a, 13b) which generally extend radially in the shadow parts of the aforementioned opaque bands. 6. Lamp according to claim 5, characterized in that said plate-shaped concealrs (13a, 13b) extend inclined downwards to one and another part of the bulb (12).