EP2132762B1 - Lamp base, vehicle lamp comprising such a base, and method for the production of a vehicle lamp - Google Patents

Description

Technical area

The invention relates to a lamp base for a vehicle lamp, in particular a halogen lamp according to the preamble of claim 1, a running with such a lamp base vehicle lamp and a method for producing such a vehicle lamp.

In the WO 97/25733 A1 is a lamp base with welded connection between the carrier sleeve and intermediate ring disclosed. The US 2,534,146 describes a bathtub with rear-mounted welding.

The DE 199 51 203 A 1 discloses a capped headlight bulb whose base comprises a welded joint between an adjusting ring supporting the lamp vessel over a fixing ring and a reference ring.

In the pamphlets EP 0 775 366 B1 and DE 20 2006 002 888 U1 Headlamps are described, which can be used for example as daytime running lights (DRL: daytime running light). Such as halogen incandescent lamp (H15) running headlight lamps have a lamp base, in which an approximately cylindrical lamp vessel is inserted. In the encompassed by the lamp vessel, filled with a filling gas interior two filaments are arranged, the Wendelabgänge are connected via molybdenum foils with power supply lines, which are guided out of a gas-tight pinch seal of the lamp vessel. The power supply lines are connected within the base part with electrical connections, which protrude as laterally projecting tabs from the base part and are contacted when inserting the headlight lamp in a headlight housing with housing-side contacts.

The lamp base of such incandescent lamps has a base part made of plastic, which is welded to a reference ring. The reference ring in turn carries an adjusting ring. Both the reference ring and the adjusting ring have radially projecting tabs which bear against one another in the assembled state in the axial direction and are then connected by welding. The lamp vessel is inserted into a fixing ring, which in turn is connected by welding to the adjusting ring, wherein a predetermined relative positioning must be adjusted in order to align the incandescent filaments of the headlamp with respect to the reflector, so that an optimal light distribution is ensured. The welding between the adjusting ring and the reference ring takes place from the front, i. from the lamp vessel side by means of laser energy. Since the tabs, along which the adjusting ring and reference ring are welded together, protrude radially over the lamp vessel, the melting areas are visible from the front. This often leads customers (car manufacturers) or designers to comment that these refractories would disturb the aesthetic appearance of the headlamp or the entire headlamp. These complaints are not to be underestimated in practice, since with comparable technical quality often visual aspects are the decisive factor for placing an order.

Presentation of the invention

The invention is based on the object, a lamp base for a vehicle lamp, a running with such a lamp base vehicle lamp and a method to create a vehicle lamp, which also meet high demands on the aesthetic appearance.

This object is achieved with regard to the lamp base by the features of claim 1, with respect to the vehicle lamp by the features of claim 4 and in terms of the method by the features of the independent claim 5. Particularly advantageous embodiments of the invention are described in the dependent claims.

The lamp base according to the invention for a vehicle lamp has a plastic base part, from which project contact lugs for electrical contacting and which carries a reference ring connected to an adjusting ring. On the adjusting ring a lamp vessel is placed directly or by means of a fixing ring. According to the invention, a melting zone of a weld between reference ring and adjusting ring is formed on rear surface sections of these rings facing away from the lamp vessel.

In the vehicle lamp according to the invention, the lamp vessel is inserted into such a base with not visible from the front melting areas.

In the manufacture of such a vehicle lamp, the reference ring and the adjusting ring are preferably first welded by a rear side facing away from the lamp vessel. Subsequently, the unit of reference and adjusting ring is attached to the base part.

By welding from the back, ie from the side facing away from the lamp base ago, are the melting areas or welds from the front not visible, so that they do not affect the aesthetic appearance of the vehicle lamp.

The connection of adjusting ring and reference ring is particularly simple if they are each carried out with radially projecting tabs along which the welding takes place.

The tabs formed on the reference ring are preferably designed as reference tabs for positional positioning of the vehicle lamp in a reflector.

In the production of the vehicle lamp, it is preferred if a fixing ring carrying the lamp vessel is placed on the adjusting ring, then the lamp position is adjusted and then the fixing ring is welded to the adjusting ring, so that incandescent filaments arranged in the lamp vessel are aligned exactly with respect to the reflector ,

For welding the metallic components of the base, a laser welding method is preferably used.

Brief description of the drawings

Fig. 1

eine perspektivische Darstellung einer H15-Lampe eines Fahrzeugscheinwerfers;

Fig. 2

eine perspektivische Darstellung eines Referenzrings und eines Justierrings von hinten her gesehen;

Fig. 3

eine Ansicht von vorne auf die Lampe aus Figur 1;

Fig. 4

eine perspektivische Ansicht des Justierrings und des Referenzrings gemäß Figur 2 und

Fig. 5

den Justierring und Referenzring gemäß Figur 2 mit angesetztem Sockelteil.

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

Fig. 1

a perspective view of an H15 lamp of a vehicle headlamp;

Fig. 2

a perspective view of a reference ring and an adjusting ring seen from the rear;

Fig. 3

a view from the front of the lamp FIG. 1 ;

Fig. 4

a perspective view of the adjusting ring and the reference ring according to FIG. 2 and

Fig. 5

the adjusting ring and reference ring according to FIG. 2 with attached base part.

Preferred embodiment of the invention

FIG. 1 shows a three-dimensional representation of a vehicle headlamp according to the invention, which is designed as a halogen incandescent lamp 1 type H15. The structure of such a halogen incandescent lamp 1 or similar lamp types (eg H1, H3, H4 or H7 lamps) is known from the prior art mentioned above, so that only the components essential for understanding the invention are described here.

The halogen incandescent lamp 1 has an approximately cylindrical lamp vessel 2, which is inserted into a lamp base 4. The lamp vessel 2 is down (view FIG. 1 ) is closed by a pinch seal 6 and filled with a filling gas containing metal halides in halogen lamps. In an H15 lamp 2 two filaments are arranged in the interior of the lamp vessel, which are welded within the pinch seal 6 via molybdenum foils with power leads, which are sealingly out of the pinch seal 6 out and protrude into the lamp base and there are welded to contact elements. The lamp base 4 has a metallic fixing ring 8, in which the pinch seal 6 of the lamp vessel 2 is positively and positively received. For this purpose, the fixing ring 8 with a profiling of Crimp seal 6 corresponding clamping recess 10 executed, are arranged in the spring elements for clamping the pinch seal 6 of the lamp vessel 2. This fixing ring 8 is welded to an adjusting ring 12, which in turn is connected to a reference ring 14. The latter is placed on an existing plastic base part 16 and welded to it. Three contact lugs 18, 20, 22 protrude from the base part 16 and come into contact with socket contacts on the lamp reflector when the halogen incandescent lamp 1 is inserted into a car headlight, so that the lamp is mechanically held and contacted in the reflector. For easier handling of the halogen incandescent lamp 1, a diagonal web 24 is provided on the base part 16 on the rear side, ie on the end face remote from the lamp vessel 2, so that the torque required for fixing the halogen incandescent lamp 1 can be applied. The mounting of the halogen incandescent lamp 1 in the socket of the reflector or the headlight housing is effected by means of a bayonet closure, wherein on the end face of a base flange 26, a spring ring 27 is fixed, which has three obliquely protruding from the spring ring spring tongues 28, which in the installed state of the halogen incandescent lamp 1 an axial exert directed spring force. Further details of the adjusting ring 12 and the reference ring 14 are based on the FIGS. 2 to 4 explained.

FIG. 2 shows a three-dimensional view of the adjustment ring 12 bearing reference ring 14 in a seen from the base part 16 ago view. Accordingly, the reference ring 14 has a pedestal part 16 facing, flanged end face 30 at which a plurality of radially inwardly protruding projections 32 is formed. On the peripheral wall of the reference ring 14 further two indentations 34 are provided, which take into account any burr on the edge of the lamp mounting opening of the headlight, such as in the EP 1 006 550 A1 is disclosed. On the inner peripheral wall of the reference ring 14, a multiply angled pressure spring 36 is fixed, which passes through a window 38 bent in the shape of a V into a window in the circumferential wall of the reference ring 14. This nose 38 is at the onset of the halogen bulb 1 resiliently against an inner peripheral wall of the socket and contributes to the position positioning. The above-mentioned projections 32 form a toothing, via which the position positioning and welding of the reference ring 14 on the base part 26 is facilitated.

At the end portion of the reference ring 14 facing the adjusting ring 12 there are three reference straps 40, 42 and 44 (see FIG FIG. 3 ) are formed, which are each provided with a bead 46 which bulges out towards the base part. These reference tabs 40, 42, 44 are designed so that a predetermined installation position is ensured within the socket when inserting the halogen incandescent lamp 1, these reference tabs 40, 42, 44 abut corresponding reference surfaces of the socket and thus the axial position and the rotational angular position determine. The reference ring 14 can be produced, for example, by a deep drawing process.

The adjusting ring 12 is placed on the reference ring 14. As can be seen in particular FIG. 3 shows, are at the reference ring 14 facing peripheral edge three tabs 48, 50, 52 formed. The geometry of the tabs 48, 50 is adapted to that of the reference tabs 40, 42, 44, so that in the illustrated installation position the tabs 40, 42, 44 and 48, 50, 52 overlap each other in pairs and lie flat against each other (see in particular FIG. 4 ). After this relative positioning of the two rings 12, 14, these are welded together along the flaps 40, 42, 44, 48, 50. This is preferably done by laser welding from behind, ie from the base side, wherein on each tab 40, 42, 44, 48, 50 two welds 54, 56 are provided, which are arranged on both sides of the beads 46. As shown in FIG. 3 , which shows a front view of the lamp vessel 2 ago on the halogen incandescent lamp 1 according to the invention, the punctiform welds 54, 56 are not visible from the front, so that the aesthetic appearance is not disturbed. In conventional halogen incandescent lamps, the welds are in each case at the front of the aforementioned tabs and would therefore be in a representation according to FIG. 3 visible, noticeable. By the measure according to the invention to carry out the welding from behind, the melting areas of the welds 54, 56 are virtually invisible, so that the excellent function of the halogen incandescent lamp 1 is accompanied by a high-quality appearance.
After welding the rings 12, 14 of the reference ring 14 is partially into a receptacle 58 (see FIG. 1 and 5 ) of the spring ring 27 provided with the base part 16 and, for example, connected by high-frequency welding.

The lamp vessel 2 is, as described above, inserted into the fixing ring 8. This preassembled unit is then according to FIG. 1 on the free, radially recessed end portion 60 (see FIG. 4 ) of the adjusting ring 12 and adjusted, so that the filaments are arranged in a predetermined axial and rotational angular position. In a subsequent manufacturing step, the fixing ring 8 is then connected in its adjusted position by means of laser welding with the adjusting ring 12.

FIG. 5 shows the unit of Justierring 12 and reference ring 14 after welding to the base part 16. As in the aforementioned DE 20 2006 002 888 U1 described, the diagonal web 24 is executed with a removable closure part, which in the illustration according to FIG. 5 not visible. This closure part releases a recess through which said power supply lines can be welded to the ends of the contact lugs 18, 20, 22. After this welding, the closure piece is inserted, so that the diagonal web 24 extends over the entire diameter of the base flange 26.

When the halogen incandescent lamp 1 is inserted into a headlight housing, a mounting receptacle of the reflector or the housing is between the reference tabs 40, 42, 44 and the spring tongues 28, so that the lamp is fixed in the axial direction. The support in the radial direction is effected by the voltage applied to the peripheral wall of the mounting receptacle nose 38 of the pressure spring 36th

Disclosed are a lamp base for a vehicle lamp, a running with such a lamp base vehicle lamp and a method for producing such a vehicle lamp, which essentially consists of a lamp vessel and a base part. The base part has an adjusting ring and a fixing ring which are welded together from a rear side facing away from the lamp vessel.

Claims (6)

1. Lamp base for a vehicle lamp, especially an incandescent halogen lamp (1), comprising a base part (16) from which contact tabs (18, 20, 22) protrude for the purpose of electrical contacting and which carries a reference ring (14) welded to an adjustment ring (12), a lamp bulb (2) being able to be placed onto the adjustment ring (12) directly or via a fastening ring (8), characterized in that a weld metal zone (54, 56) of the welding between reference ring and adjustment ring (12, 14) is formed on rear surface sections (48, 50, 52) of said rings facing away from the lamp bulb (2), wherein adjustment ring (12) and reference ring (14) have radially projecting lugs (40, 42, 44; 48, 50, 52) aligned with one another, along which the welding is effected.
2. Lamp base according to Claim 1, wherein the reference lugs (40, 42, 44) on the reference ring side are for the positioning when inserting the incandescent halogen lamp (1) into an assembly receptacle.
3. Vehicle lamp, especially incandescent halogen lamp (1) comprising a lamp bulb (2) filled with a filling gas, which is fused in a gastight manner and in which at least one filament is accommodated and which is inserted in a lamp base (4) according to one of the preceding patent claims.
4. Method for producing a vehicle lamp according to Claim 3 comprising the steps: placing the base part (16) against the reference ring (14) welded to the adjustment ring (12), and

   - welding together reference and adjustment ring (12, 14) from a rear side facing away from the lamp bulb (2),

   - placing the base part (16) against the reference ring (14) welded to the adjustment ring (12), and

   - fitting the lamp bulb (2).
5. Method according to Claim 4, the welding together of reference ring and adjustment ring (12, 14) being effected by means of laser welding.
6. Method according to Claim 4 or 5, wherein a fastening ring (8) carrying the lamp bulb (2) is fitted onto the adjustment ring (12), aligned and then welded to the latter.

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