JP5009938B2 - lamp - Google Patents

Description

  The invention relates to a lamp according to the superordinate concept of claim 1.

I. Prior art Such a lamp is disclosed, for example, in EP1006551B1. In this document, each of the feed wires protruding from the lamp vessel has a metal plastic socket provided with a through-hole for welding to a metallic contact lug arranged in the socket by means of a laser, in particular for vehicle headlights. A halogen incandescent lamp is described.

II. DESCRIPTION OF THE INVENTION The object of the present invention is to provide a lamp according to the superordinate concept, in which the welding connection between the feeder and the electrical contact element is improved.

  This problem is solved in the present invention by the configuration described in the characterizing portion of claim 1. In the dependent claims particularly advantageous embodiments of the invention are described.

The lamp according to the present invention has a lamp socket, a lamp container fixed to the lamp socket, at least one light emitting means surrounded by the lamp container, and at least two power supply wires drawn from the lamp container. And the power supply wires are used to supply a voltage to the at least one light emitting means, each connected to an electrical contact element arranged in the lamp socket, to which the at least one power supply is connected. At least one through hole is provided for welding the wire and the corresponding electrical contact element, the at least one through hole passing through the at least one through hole and the incident angle of the laser beam being 0 °. Thus, it is formed so as to be focused on the surface of the welding position. That is, the at least one through hole is formed such that a laser beam for performing a welding process hits the surface of the welding position perpendicularly. This improves the quality of the welded joint between the feed wire and the contact lug. In particular, the resistance of the weld joint is increased by about 30%. In the welding process shown in FIG. 4 according to the prior art cited above, the laser beam strikes the surface of the welding location at an incident angle of about 22.3 °, which causes a portion of the laser energy to be absorbed by the feed wire. It has been proved that it cannot be used in the welding process. As schematically shown in FIG. 3 for the lamp of the present invention, the incident angle at which the laser beam is incident on the surface of the welding site is 0 ° (the incident angle is measured relative to the surface normal of the surface). This defect does not appear, or even to a minor extent.

  Advantageously, each pair of contact lugs and feed wires to be welded is provided with a suitably shaped through-hole so that the size of the socket through-hole can be kept as small as possible.

  In this advantageous embodiment, the at least one through hole is arranged at a height equal to the welding position.

  The contact elements are preferably formed as contact lugs, each having a groove, through which the extended end of the corresponding feed wire is passed. This makes it possible to easily collect parts to be welded.

  The welding position is advantageously a web that limits the groove of the contact lug. This is because such a web can be easily melted by a laser to form a weld joint between the contact lug and the feeder wire.

III. DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the invention will be described in detail on the basis of advantageous embodiments.

FIG. 1 shows schematically an advantageous embodiment of a lamp according to the invention with a reflector. Partially cut out.
2 is a cross-sectional view of a part of the lamp socket of the lamp shown in FIG.
FIG. 3 is a plan view of a structure for laser welding a contact lug and a feeding end of each feeder line disposed in the groove of the contact lug corresponding to the lamp according to the present invention.
FIG. 4 is a plan view of a configuration for laser welding a contact lug and a feeding end of each feeder line disposed in the groove of the contact lug, corresponding to a lamp of the prior art.

  This advantageous embodiment of the present invention is a single filament type halogen incandescent lamp configured for use in automotive lights. The lamp has a substantially cylindrical glassy lamp envelope 10, which has a hermetically sealed pinch seal 10a. The dome 10b of the lamp envelope 10 is provided with a light absorbing coating. As the light source, an incandescent filament 11 oriented parallel to the lamp envelope axis is used. The incandescent filament is drawn out from the pinch seal 10a and electrically connected to two feeding wires 12 and 13 made of molybdenum wire. Yes. The pinch seal 10a of the lamp envelope 10 is fixed to a metallic holding portion composed of a bowl-shaped holder portion 14a, an intermediate ring 14e, and an annular support sleeve 14b. In addition to the metallic holding parts 14a, 14b, the lamp socket also has a plastic socket part 15 provided with electrical terminals 16, 17 of the lamp, which is provided with an annular metallic support sleeve 14b. Is fixed. The support sleeve 14b has three reference noses 14e in one plane and a crimp spring 14d for attaching the lamp to the reflector 20 of the automobile light. The reflector 20 is sealed by a silicone seal ring 19 provided on the outer wall of the reflector 20 and the plastic socket portion 15. FIG. 1 schematically shows the construction of a lamp according to an advantageous embodiment and how it is used in a headlight.

  The electrical terminals 16, 17 of the lamp consist of two metallic contact lugs 16, 17, each of which is welded to one of the feed wires 12, 13 (shown in FIG. 1). It has not been). The contact lugs 16, 17 are manufactured from thin steel plates and are injection molded into the plastic socket part 15 of the lamp socket. These contact lugs 16 and 17 are each made of an L-shaped thin steel plate. Each of the leg portions 16a and 17a of the L-shaped contact lugs 16 and 17 is formed as an insertion contact, and grooves 16c and 17c are provided in the other leg portions 16b and 17b. The feeding ends 12a and 13a of the feeding wires 12 and 13 are passed through the grooves 16c and 17c, respectively. The regions of the contact lugs 16 and 17 that are normally hidden in the cross-sectional view of FIG. 2 are indicated by broken lines in FIG. The angular region of the L-shaped contact lugs 16, 17 is normally not visible because it is closely injection molded into the plastic socket part 15. The grooves 16c and 17c are laterally restricted by two webs 16d and 16e or 17d and 17e having different lengths. Both webs 16d, 16e or 17d, 17e have skewed portions 16f, 17f on the side edges facing the grooves 16c, 17c, respectively. The oblique portions 16f and 17f are used for passing the feeding wires 12 and 13 through the grooves 16c and 17c. The relatively short webs 16e, 17e have a smaller width than the relatively long webs 16d, 17d. The weld joint between the feed wires 12 and 13 and the contact lugs 16 and 17 is formed by heating the material for a short time beyond the melting point of the material of the relatively short webs 16e and 17e using a laser. After the melt is cured, the feeding ends 12a and 13a of the feed wires 12 and 13 are connected to relatively short webs 16e and 17e. The L-shaped leg portions 16 b and 17 b welded to the power supply wires 12 and 13 extend to an internal space formed by a support sleeve 14 b fixed to the plastic socket portion 15. The support sleeve 14b is provided with two through-holes 18 at the height of the webs 16e, 17e, which, after installation of the lamp socket, are short webs of feed wires 12 or 13 and corresponding contact lugs 16 or 17. Laser welding with 16e and 17e is performed. The two through holes 18 of the support sleeve 14b are adjacent to each other and have the same height as the weld joint between the contact lug 16 and the power supply wire 12, or the same height as the weld joint between the contact lug 17 and the power supply wire 13. Is provided. Each of the through holes 18 is formed so that the laser beam 19 for performing the above-described welding joint is focused on the surface of the corresponding welding position at an incident angle of 0 °, that is, on the surface of the narrow surface of the web 16e or 17e. The In other words, the laser beam 19 is perpendicularly incident on the surface of the narrow surface of the web 16e or 17e during the welding process, as schematically shown in FIG.

  The invention is not limited to the embodiments detailed above. For example, if two light emitting means with three feed wires and three contact lugs are used, the lamp socket can have three through holes. Further, instead of providing a plurality of through holes, it is also possible to provide only one corresponding larger through hole and perform all laser welding of the contact lug and the feeding wire through this one through hole.

1 schematically shows an advantageous embodiment of a lamp according to the invention with a reflector. Partially cut out. FIG. 2 is a cross-sectional view of a part of a lamp socket of the lamp shown in FIG. 1. It is a top view of the structure for carrying out laser welding of the contact lug corresponding to the lamp | ramp by this invention, and the extending | stretching edge part of each feeder line arrange | positioned in the groove | channel of this contact lug. It is a top view of the structure for carrying out laser welding of the contact lug corresponding to the lamp | ramp of a prior art, and the extending | stretching edge part of each electric power feeding line arrange | positioned in the groove | channel of this contact lug.

Claims (3)

A lamp socket; a lamp vessel (10) fixed to the lamp socket; at least one light emitting means (11) surrounded by the lamp vessel (10); and at least two drawn from the lamp vessel (10) A lamp having two feeding wires (12, 13),
The feeder wires (12, 13) are used to supply voltage to the at least one light emitting means (11);
The feed wires (12, 13) are respectively connected to electrical contact elements (16, 17) arranged in the lamp socket ;
In order to weld each of the power supply wires (12, 13) and the electrical contact element (16, 17) corresponding to each of the power supply wires (12, 13), a through hole ( 12, 13) is provided for each power supply wire (12, 13). 18) is provided in the lamp socket ,
Each of the through holes (18) is at a height equal to the welding position of each power supply wire (12, 13) and the electrical contact element (16, 17) corresponding to each power supply wire (12, 13),
By laser beam is focused at an incidence angle of 0 ° on the surface of the welding site through the through hole (18), corresponding to the feeding wires (12, 13) and the feeding wires (12, 13) Lamp, characterized in that a weld connection with the electrical contact element (16, 17) is formed. The electrical contact element is formed as a contact lug (16, 17) having a groove (16c, 17c), respectively, and the feeding end ( 12a, 13a) is passed, according to claim 1 Symbol mounting of the lamp. The lamp according to claim 2 , wherein the welding position is arranged on a web (16e, 17e) that limits the groove (16c, 17c).

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