Electrical connectors – With vitreous-type envelope – Having only two duplicate contacts arranged bilaterally...
Patent
1998-08-18
2000-08-01
Nguyen, Khiem
Electrical connectors
With vitreous-type envelope
Having only two duplicate contacts arranged bilaterally...
H01K 100
Patent
active
060958669
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to electric lamps and particularly to electric lamp mountings. More particularly the invention is concerned with a lamp mounting with a spring.
BACKGROUND ART
Such an electric lamp is described, for example, in Patent Application PCT/DE96/01982. This patent application describes a cementlessly capped electric lamp for use in a motor vehicle headlight. This lamp has a lamp cap constructed from metal parts and plastic parts. The lamp cap has a metal holding part in which the lamp bulb is fixed, a metal support sleeve supporting the holding part, and a plastic cap part, which is provided with the electric terminals of the lamp and in which the support sleeve is anchored. The metal support sleeve of the lamp is constructed in the shape of a ring and matched to the fitting diameter of the opening, constructed as a lampholder, of the headlight reflector, and equipped with at least one pressure spring which, after the lamp has been installed in the reflector, bears against the reflector wall in the region of the lamp holder. This at least one pressure spring ensures the lamp is firmly seated in the lampholder of the reflector, and balances slight tolerances in the manufacture of the lamp cap and in the opening, constructed as lampholder, of the headlight reflector. The at least one pressure spring is designed as a cambered leaf spring whose ends bear against the inner wall of the metal, ring-shaped support sleeve. Moreover, the at least one leaf spring has an outwardly cambered section which reaches through a cutout in the support sleeve and, after the lamp has been installed in the reflector, bears against the reflector wall in the region of the lampholder, as well as two inwardly cambered sections, which are arranged on both sides of the outwardly cambered section of the leaf spring.
DISCLOSURE OF THE INVENTION
In the electric lamp according to the invention, the lamp cap is fitted with at least one pressure spring which, after the lamp has been installed in the headlight reflector, bears against the reflector wall in the region of the lampholder and ensures that the lamp is seated firmly in the lampholder of the reflector. The pressure spring is constructed as a cambered leaf spring. It has an outwardly cambered section, which reaches through a cutout in the support sleeve and, after the lamp has been installed in the headlight reflector, bears against the reflector wall, and which is provided according to the invention with a V-shaped region. At least the connecting piece connecting the two V limbs reaches through the cutout in the support sleeve, with the result that, after the lamp has been installed in the headlight reflector, it bears resiliently against the reflector wall constructed as the lampholder. The spring action of the pressure spring is improved by comparison with the prior art quoted above by means of the V-shaped region. The V-shaped region of the outwardly cambered section reduces the contact area between the lampholder and the pressure spring by comparison with the prior art, and increases the contact pressure. In this case, the angle which the two V limbs of the V-shaped region form with one another is advantageously selected such that it is between 80 degrees and 110 degrees. In order to avoid scratch traces on the lampholder when assembling the lamp in the headlight, the connecting piece connecting the two V limbs is advantageously rounded. The two inwardly cambered sections of the leaf spring are advantageously constructed in the shape of a U. As a result, by comparison with the prior art the pressure acting on the leaf spring after the lamp has been mounted can be better absorbed by a reversible deformation of the inwardly cambered sections, that is to say by a reversible compression of the U-shaped sections of the leaf spring.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is explained in more detail below with the aid of a preferred exemplary embodiment. In the drawing:
FIG. 1 shows a diagrammatic side view of an electric lamp according
REFERENCES:
patent: 5120233 (1992-06-01), Mikola
patent: 5320562 (1994-06-01), Moller et al.
patent: 5752842 (1998-05-01), Friederichs et al.
Helbig Peter
Steiner Hermann
Wild Hans
Meyer William E.
Nguyen Khiem
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen MBH
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