Vehicle headlight

H - Electricity – 01 – K

Patent

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Details

H01K 1/46 (2006.01) H01K 1/58 (2006.01)

Patent

CA 2555490

The invention relates to a vehicle headlight bulb with a bulb receptacle, a spiral wound filament (2) which is arranged inside the receptacle for the bulb (1) and a lamp base which has a metal base bushing (3) wherein the end (11) of the bulb receptacle (1), which is sealed by means of a molybdenum film seal (112,113) is fixed. According to the invention, the metal base bushing (3) comprises at least one molded tab (32) which lies adjacent to the sealed end (11) of the bulb receptacle (1), in the overlapping area of the molybdenum films (112,113), with current supply wires (23,24) which protrude from the bulb receptacle and which are connected thereto, in order to reduce thermal load in the above-mentioned overlapping area during operation of the bulb.

L'invention concerne une ampoule de phare de véhicule comportant une enveloppe de lampe, un filament (2) disposé dans une enveloppe de lampe (1), et un culot de lampe présentant une douille de culot métallique (3) dans laquelle l'extrémité (11) de l'enveloppe de lampe (1) fermée à l'aide d'un joint à pellicules de molybdène (112, 113) est fixée. Selon l'invention, la douille de culot métallique (3) présente au moins une languette (32) qui, dans la zone de chevauchement des pellicules de molybdène (112, 113), s'appuie avec les câbles d'alimentation électrique (23, 24) connectés à ladite douille, faisant saillie hors de l'enveloppe de lampe, contre l'extrémité (11) de l'enveloppe de lampe (1) de manière à réduire les contraintes thermiques dans ladite zone de chevauchement lors du fonctionnement de la lampe.

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