WO2008107442A1

WO2008107442A1 - Headlight

Info

Publication number: WO2008107442A1
Application number: PCT/EP2008/052629
Authority: WO
Inventors: Peter Helbig
Original assignee: Osram Gesellschaft mit beschränkter Haftung
Priority date: 2007-03-08
Filing date: 2008-03-04
Publication date: 2008-09-12
Also published as: EP2115349B1; EP2115349A1; DE102007011430A1

Abstract

The invention relates to a headlight, especially a vehicle headlight, in which a carrier (4) is fixed to a reflector (2), said carrier carrying a lamp (6), preferably a halogen filament lamp, and contacts for contacting the lamp (6). The contacting and mechanical mounting functions are built into the carrier (4), as are references for positioning the lamp.

Description

Confession

headlights

Technical area

The invention relates to a headlamp, in particular a vehicle headlamp, with a reflector, which is associated with a light source, which is contacted by means of a contact carrier carrying electrical contacts.

State of the art

In the subsequently published DE 10 2005 045 765 of the applicant, a vehicle headlamp is described in which a reflector with a receptacle for a lamp, in ^¬ example, a halogen lamp is designed, which protrudes with her lamp vessel in the reflector, wherein the lamp cap with the electrical contact lugs of the lamp is arranged on the back outside of the reflector. For electrical contacting of the lamp, a contact housing is provided which is fastened via a carrier part on the rear side of the reflector. In the concrete solution, three reflectors are arranged laterally nested in each other, in which case the carrier part is arranged with the respective ei ^¬ NEN reflector associated contact housings on the back of this reflector assembly.

The attachment of such support members can be done in principle either by screws or by latching components. However, solutions with latching elements always assume that side slides are provided on the tool for producing the reflector or the carrier part, so that the tool design and production are extremely expensive. Another disadvantage Such slide tools is that they wear out relatively quickly and thus require a high maintenance. A further disadvantage is that the components produced with such slide tools must be subsequently deburred, since burrs or slight offset areas can occur in the area of the slides. When using a screw connection, it is necessary that threads in the headlight must be cut. Through this threading may occur dusting, so that the Reflektoroberflä ^¬ che can be dirty.

Presentation of the invention

The invention has for its object to provide a ge ^¬ ringem produced headlight.

This object is achieved by the features of claim 1. Particularly advantageous exporting ^¬ conclusions of the invention are described in the dependent claims.

This object is achieved by a headlamp, in particular a vehicle headlamp, in which a reflector is associated with a light source which is contacted by means of a carrier fixed to the reflector and carrying electrical contacts. The carrier is also designed with a coupling for fixing the light source.

According to the invention the carrier thus performs a dual function ^¬ because it carries both the housing-side contacts and the to be contacted so that the light source, so that the mechanical and electrical contacting of the Light source are placed in the carrier inside. By ge ^¬ suitable design of this carrier, the light source can be aligned very precisely with respect to the reflector (referencing). Furthermore, it is advantageous that it is always ensured with the solution according to the invention that the electrical contacts are made dimensionally extremely exact to the light source side contacts. Another advantage is that by eliminating a coupling on the reflector this can be performed very easily and with high optical quality.

The coupling for fixing the light source is preferred ^¬ as a bayonet coupling with a reference surface for the defined system of the light source executed.

The support of the carrier at the back of the reflector is particularly stable when this is executed as a three-point bearing ^¬ leads. It is preferred to arrange the coupling centrally on the carrier, which is then carried out with three radially projecting support arms, one of which carries the contacts and which are fixed along their end portions on the reflector.

For easy attachment of the reflector this can be performed on its back with pins for placing the carrier.

To avoid assembly errors, the pins can be asymmetrically arranged or formed, so that an accidental rotation of the carrier is excluded.

The pins are preferably designed with a radially zurückge ^¬ set end portion for placing a Sicherungsmit ^{¬ means} , wherein connected to a reflector with the reflector. which base part an annular support surface is created for the carrier.

The preparation of the carrier is particularly simple if it is made as an injection molded part, wherein a contact housing receiving contacts is integ ^¬ ration in the carrier.

Short description of the drawing (s)

The invention will be explained in more detail below with reference to a preferred embodiment. Show it:

FIG. 1 shows a three-dimensional illustration of a vehicle headlight rear side;

Figure 2 is an exploded view of the vehicle headlight of Figure 1;

Figure 3 is a detail view of a reflector of the vehicle headlight of Figure 1 and

Figures 4 and 5 representations of a carrier of the vehicle ^¬ headlight of Figure 1.

Preferred embodiment of the invention

The invention will be explained below with reference to a vehicle ^¬ headlamp. Of course, the He ^¬ invention can also be used in other headlight system or lights.

1 shows a three-dimensional representation of a reflector / lamp assembly 1, which is used in a not dargestell ^¬ tes headlight housing, which in radiating direction is closed by a translucent front cover. The reflector / lamp assembly 1 consists essentially of a reflector 2, on the back visible in Figure 1, a support 4 is fixed, which carries a light source, such as a Einwendel- halogen incandescent lamp or a xenon lamp and a contact ^¬ housing 8. The contact housing 8 has arranged in recesses 10, 12 socket contacts, which are also connected via not shown connecting cable to the power supply. The illustrated halogen incandescent lamp 6 is embodied with two radially projecting and superimposed contact lugs 14, 16 which, when the halogen incandescent lamp 6 is screwed in, swivel into the contact housing 8 from the open side of the recesses 10, 12 visible in FIG. 1, and then in the illustrated final rotational position of FIG halogen incandescent lamp 6 is in contact with the initially called ge ^¬ contacts.

The exploded view of Figure 2 further details of the assembly can be removed.

In this illustration, the contact housing 8 is shown visible from the rear, so that the rear-side mouths of the recesses 10, 12 can be seen, in which said contacts are inserted and out of which extend the connection cables. The contact housing 8 is approximately cuboidal, and has two contact slots 18, 20 on its facing the halogen incandescent lamp wall 6, 20 through which the contact lugs 14, 16 can be pivoted into their Endpo ^¬ position. Further details of the contact housing 8 are explained below with reference to FIGS. 4 and 5. As is apparent from Figures 2 and 3, three Zap ^¬ fen 22, 24, 26 are formed on the Re ^¬ reflector rear side for attachment of the carrier 4, each having a radially ^{¬ to} reset end portion 28 and pressed against the reflector back wall base 30 have. A Ra ^¬ dialschulter between the base portion 30 and the end portion 28 of the pin 26 forms a bearing surface 32 for the carrier 4. The three pins 22, 24, 26 lie on a common pitch circle, the angular distance equal (120 °) or be selected differently can. In the latter case, a rotation is then guaranteed. As mentioned above, the reflector 2 can be made of thermosets by pressing and possibly vapor deposition with a reflector layer. The reflector 2 according to the invention has a recess 34 in the middle, through which extends a part of the base and the lamp vessel of the lamp. In contrast to conventional solutions, however, no means for holding the lamp 6 are provided on this reflector 2. This holder is integrated in the carrier 4 so that it can fulfill its double function mentioned above - electrical and mechanical contacting of the lamp 6. Details of the carrier 4 are reference to Figures 4 and 5 erläu ^¬ tert wherein ben Figure 4 is an isometric view of o- and Figure 5 shows a bottom view of the carrier. 4

Accordingly, the carrier 4 has an approximately star-shaped basic body with an approximately annular central part 36, on which three radially projecting support arms 38, 40, 42 are formed. These are aligned with respect to the pins 22, 24, 26 and are at their end portions with Assembly openings 44 provided, whose clear width corresponds to the diameter of the end portions 28 of the pins 22, 24, 26, so that the carrier 4 can be placed on this. Here, as already mentioned above, the distribution of the pins 22, 24, 26 on the rear side of the reflector or its geometry can be selected such that the carrier 4 can only be placed in a certain position.

The contact housing 8 is attached to the support arm 40 and stands with its visible in Figure 2 rear over the peripheral edges of the support arm 40 addition, so that there is enough space for receiving the contacts and the contact lugs available. The reflector 2 for white ^¬ send narrow side of the contact housing 8 closes with the side facing the reflector 2 major surface of the substrate 4 (see Fig. 5). The contact housing is arranged practically at the ^¬ ser narrow side "standing" on the support arm 40th As shown in Figure 5, the supporting arms of the end portions at the side facing the reflector 2 major surfaces 38, 40 in the loading rich recesses 46, 48 are provided, The cutout is not provided along the bottom surfaces of the carrier 4 on the associated pegs 22 and 24. Accordingly, the base part of the associated peg 26 is designed with a smaller axial length in order to provide a planar contact of the carrier 4 to allow the pins 22, 24, 26 and thus with respect to the reflector 2. By this measure, a rotation is also effected.

The fastening of the lamp 6 is carried out in a conventional manner via a bayonet closure, wherein the housing-side

Parts of this bayonet lock not - as in the state the technology - are formed on the reflector but on the support 4. For this purpose, the central part 36 with a bayonet recess 50 - also called keyhole - executed on the peripheral wall in a conventional manner three obliquely bayonet cams 52, 54, 56 are formed, which cooperate with corresponding bayonet elements on the base of the lamp 6, so that these can be reliably locked in the carrier part 4 by turning. The construction of such bayonet couplings is known, so that further explanations are unnecessary. The coupling is designed so that the base of the lamp 6 in their desired ^¬ position along a defined supporting surface 58 (see Figure 5) rests on the support 4, wherein the radial ^¬ positioning approximately edges thanks to the precise embodiment of the leadership of the bayonet cams 52, 54, 56 takes place. Since the position positioning of the lamp 6 with respect to the support member 4 is thus ensured in the locked state, the orientation of the lamp 6 with respect to the reflector 2 depends only on the exact attachment and adjustment of the support 4 on the reflector 2.

In conventional solutions in which the lamp 6 is attached directly to the reflector 2, the Einjustierung takes place as follows: The pressing tool for the production of the reflector 2 is initially worked with excess. The reflectors made of these are tested with the aid of a so-called zero-value lamp (measuring lamp) and the light distribution is determined. The tool is corrected until the desired light distribution is achieved. This adaptation of the references (contact surfaces) of the lamp 6 to the reflector 2 is extremely time consuming and kos ^¬ tenintensiv. In the solution described above one arrives much faster to the goal, since only the position of the carrier part 4 on the reflector 2 has to be changed in order to set the optimum light distribution. This position change can be made easily transfer through adaptation of the journal geometry, Stud position or Endab ^¬ sections 28 of the pin. This can be done in the tool for the manufacture of the reflector 2, for example in that the pin length is adjusted by means of inserts on the press ^¬ tool by these pins are formed by inserts of the tool, which are respectively turned on or turned out to deviations in the axial direction to correct. Lateral (radial) deviations of the lamp position can be changed by lateral displacement of these inserts and thus the pin position. The cost-intensive reworking of the tool ent ^¬ falls thus, since only a fine adjustment of the tool inserts is required.

When mounting the module, the prefabricated carrier 4 is placed on the end portions 28 of the pins 22, 24, 26 and then on the forth from the carrier 4 forth ^¬ end sections 28 each have a Sicherungsmit ^¬ tel, for example, a ^lock washer 58 according to Figures 1 and 2 attached. Such locking washers 58 are designed with spring tongues, which hold the carrier 4 non-positively and positively on the respective pin 22, 24, 26. Of course, other securing means, such as screws or the like can be used. Furthermore, it is also possible to connect the carrier by gluing, forming or otherwise with the reflector 2. Instead of the pin and sleeve-like receptacles can be provided in the then formed on the carrier 4 pins or inserted into the carrier 4 securing means, for example. Fastening bolts are used.

In the above-described solution, the bayonet fitting is integrated in the carrier 4, in principle these elements of the bayonet closure could also be used as a metal component.

Disclosed is a headlamp, in particular a driving ^¬ zeugscheinwerfer, in which a reflector 2, a support 4 is fixed, which carries a lamp 6, preferably a Ha ^¬ logenglühlampe and contacts for contacting the lamp 6. In the support 4 thus the functions contacting and mechanical support and the references for positioning the lamp 6 are integrated.

Claims

claims

1. Headlight, in particular vehicle headlamp with a reflector (2), which a light source (6) is supplied ^¬ arranged, by means of a on the reflector (2) fixed ^¬ down, electric contacts supporting carrier (4) is contacted, which is also a clutch (50) for Be ^¬ consolidate the light source (6).

2. Headlight according to claim 1, wherein the coupling is a bayonet coupling with a bayonet recess (50), wherein on the support (4) has a reference surface (58) for positional positioning of the light source (6) is formed.

3. Headlight according to one of the preceding claims, wherein the carrier (4) via a three-point bearing on the reflector (2) is supported.

4. Headlight according to claim 3, wherein the coupling (50) on a central part (36) of the carrier (4) is formed, of which three radially projecting support arms (38, 40, 42) extend away, one of which is a contact housing ( 8) for the contacts and having at their ends mounting holes (44).

5. Headlight according to one of the preceding claims, wherein on a rear side of the reflector (2) pins (22, 24, 26) for placing the carrier (4) are ^{ausgebil ¬} det.

6. Headlight according to claim 5, wherein the pins (22, 24, 26) are asymmetrically formed or arranged.

7. A headlight according to claim 5 or 6, wherein each pin (22, 24, 26) has a base part (30) and a radially recessed end section (28), so that an annular bearing surface (32) for the carrier (4). is ^¬ create.

8. Headlight according to one of the preceding claims, wherein the carrier (4) is made by injection molding of plastic.

9. Headlight according to one of the preceding claims, wherein the light source (6) is a halogen incandescent lamp.