CN110071032B - Incandescent lamp for a motor vehicle headlight and method for producing the same - Google Patents
Incandescent lamp for a motor vehicle headlight and method for producing the same Download PDFInfo
- Publication number
- CN110071032B CN110071032B CN201810134386.3A CN201810134386A CN110071032B CN 110071032 B CN110071032 B CN 110071032B CN 201810134386 A CN201810134386 A CN 201810134386A CN 110071032 B CN110071032 B CN 110071032B
- Authority
- CN
- China
- Prior art keywords
- incandescent
- lamp
- metal foil
- incandescent filament
- quartz glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000011888 foil Substances 0.000 claims abstract description 94
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 47
- 229910052750 molybdenum Inorganic materials 0.000 claims description 46
- 239000011733 molybdenum Substances 0.000 claims description 46
- 238000003825 pressing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 description 30
- 150000002367 halogens Chemical class 0.000 description 30
- 239000011521 glass Substances 0.000 description 11
- 238000003466 welding Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000005354 aluminosilicate glass Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910000421 cerium(III) oxide Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/18—Mountings or supports for the incandescent body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/38—Seals for leading-in conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/40—Leading-in conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/06—Attaching of incandescent bodies to mount
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/12—Joining of mount or stem to vessel; Joining parts of the vessel, e.g. by butt sealing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K7/00—Lamps for purposes other than general lighting
- H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Resistance Heating (AREA)
Abstract
An incandescent lamp (1) for a motor vehicle headlight, having a lamp vessel (10) made of quartz glass, which encloses at least one incandescent filament (20) and has at least one sealed end (102) which is provided with a current lead for supplying the incandescent filament, the current lead comprising a first metal foil (25) and a second metal foil (26), the metal foils of which are each embedded in the sealed end (102) of the lamp vessel (10), the at least one incandescent filament having a first incandescent filament end (21) and a second incandescent filament end (22), the first incandescent filament end (21) being connected to the first metal foil (25) by means of a first current supply line (23), the second incandescent filament end (22) being connected to the second metal foil (26) by means of a second current supply line (24), the first and second incandescent filament ends (23, 24) being fastened to the respective metal foil (25, 24) only in the sealed end (102) of the lamp vessel (10), 26) At the respective incandescent filament ends (21, 22). A method of manufacturing the incandescent lamp.
Description
Technical Field
The invention relates to an incandescent lamp for a motor vehicle headlight, which incandescent lamp has a lamp vessel made of quartz glass, and in particular to a halogen incandescent lamp having a lamp vessel made of quartz glass, which is used as a light source in a motor vehicle headlight, for example for generating a low beam or a high beam.
Background
Incandescent lamps for motor vehicle headlights, for example halogen incandescent lamps of the ECE type H7, are available on the market, which have a lamp vessel made of quartz glass with an incandescent filament arranged in its interior, wherein the respective ends of the incandescent filament are each connected by means of a feed line to a molybdenum foil which is embedded in the sealed end of the lamp vessel. In addition, the current supply line is fixed at a specific distance from one another between two glass rods that are fusion-bonded to one another, which extend perpendicularly to the current supply line and are arranged in the interior of the lamp vessel.
Furthermore, halogen incandescent lamps of the ECE type H1 are commercially available for use in motor vehicle headlamps, which have a lamp vessel composed of quartz glass with an incandescent filament arranged in its interior space, wherein the respective ends of the incandescent filament are connected directly, i.e. without additional wires, to a molybdenum foil which is embedded in the sealed ends of the lamp vessel.
Furthermore, halogen incandescent lamps of the ECE type H7 are commercially available, which have a lamp vessel composed of hardened glass, in particular of alkali-free aluminosilicate glass, with an incandescent filament arranged in its interior, wherein the respective ends of the incandescent filament are connected to current supply lines composed of molybdenum, which are led out through the sealed ends of the lamp vessel without the use of molybdenum foils.
Disclosure of Invention
The object of the invention is to provide an incandescent lamp for a motor vehicle headlight, which has a lamp vessel made of quartz glass and which has an improved support for at least one incandescent filament, and to provide a production method for such an incandescent lamp.
This object is achieved by the incandescent lamp according to the invention or by the method according to the invention.
The incandescent lamp according to the invention has a lamp vessel composed of quartz glass, which surrounds at least one incandescent filament, and the lamp vessel having at least one sealed end provided with current leads for supplying at least one incandescent filament, wherein the current lead comprises a first metal foil and a second metal foil, which are embedded in the sealed end portions of the lamp vessel, and at least one incandescent filament has a first incandescent filament end and a second incandescent filament end, wherein the first incandescent filament end is connected to the first metal foil by means of a first feed line and the second incandescent filament end is connected to the second metal foil by means of a second feed line, and wherein the current supply lines are fixed only at the respective metal foils in the sealed ends of the lamp vessel and at the respective incandescent filament ends.
The incandescent lamp according to the invention has supply lines which are each fixed only at two locations, namely at the respective incandescent filament end and at the respective metal foil in the sealed lamp vessel end. Glass rods known from the prior art described above for fixing the supply lines at a specific distance from one another are not required. The distance between the at least one incandescent filament and the end of the sealed lamp vessel equipped with current leads can thereby be reduced. Accordingly, the length of the feeder can also be reduced, thereby improving the shock resistance of the incandescent lamp. Furthermore, by dispensing with the glass rod described above, the outer diameter of the cylindrical lamp vessel section surrounding the at least one incandescent filament can be reduced.
Compared to the above-described prior art with incandescent lamps having a quartz glass lamp vessel, the incandescent filament ends of which are connected directly, i.e. without supply leads, to the molybdenum foil, the incandescent lamp according to the invention has the advantage that: the feed line allows the incandescent filament to be more accurately oriented in the interior of the lamp vessel.
The incandescent lamp according to the invention has the advantage of a higher heat resistance compared to the above-mentioned prior art incandescent lamp with a lamp vessel consisting of hardened glass.
The term quartz glass means having greater than or equal to 95 weight percent SiO in the glass2A fraction of glass. The remaining proportion of less than or equal to 5% by weight comprises, where possible, the additional materials and unavoidable impurities of the glass. For example, the quartz glass can contain cerium oxide and titanium dioxide as doping materials in order to reduce the transparency of the quartz glass to ultraviolet radiation. Examples for quartz glass are known under the trade marks VYCOR and OVISIL. The VYCOR quartz glass has 95 to 98 weight percent of SiO in the glass2The OVISIL quartz glass has a SiO content of more than 99 wt.% in the glass2And (4) shares. Quartz glass due to its significantly higher SiO2The proportion has a significantly higher heat resistance than hardened glass, in particular than alkali-free aluminosilicate glass, which usually has SiO in the range of only 50 to 70 wt.%2And (4) shares.
Advantageously, the sealed end of the lamp vessel of the incandescent lamp according to the invention, which is equipped with current lead-throughs, is formed as a so-called press seal, and the surface of the sealed end of the lamp vessel has at least one depression which is arranged in a region between the overlapping or connecting region of the first current supply line and the first metal foil and the overlapping or connecting region of the second current supply line and the second metal foil. In this way, relatively little quartz glass material is provided in the region described above, in order not to exert a significant disruptive force on the connection of the feed line to the metal foil when producing the sealed end of the lamp vessel which is equipped with the current lead.
Advantageously, the surface of the sealed end of the lamp vessel according to the invention has at least one web structure in order to be able to fix the sealed end in the socket sleeve. At least one of the tab structures preferably comprises a cruciform tab arrangement. The sealed end can thereby be fixed in the socket sleeve by means of the web structure along two axes oriented perpendicular to one another.
Preferably, the lamp vessel of the incandescent lamp according to the invention has a cylindrical lamp vessel section which surrounds the at least one incandescent filament and has an outer diameter which has a value of less than 10mm, in order to be able to fit the incandescent lamp according to the invention into a motor vehicle headlight in a compact structural manner.
The metal foils of the incandescent lamp according to the invention advantageously each have at least one bent edge, preferably a bent longitudinal edge, in order to increase the rigidity of the metal foils.
The metal foil of the incandescent lamp according to the invention is preferably formed as a molybdenum foil in order to achieve a good welded connection to the supply line and to achieve a reliable, gas-tight sealing of the lamp vessel and a high heat resistance. The current supply line of the incandescent lamp according to the invention is preferably formed for this purpose as a molybdenum wire.
The incandescent filament of the incandescent lamp according to the invention is preferably formed as a coiled filament of tungsten wire in order to ensure a high luminous density and a high heat resistance.
The incandescent lamp according to the invention is preferably formed as a halogen incandescent lamp in order to realize a halogen cycle process for preventing the tungsten evaporated by the coiled filament from blackening the lamp vessel. It is particularly preferred that the halogen incandescent lamp according to the invention is formed as a halogen incandescent lamp with only one incandescent filament, in particular as a halogen incandescent lamp of ECE type H7, H8, H9 or H11. These halogen incandescent lamps can also have a lamp vessel which is partially or completely provided with a coating which changes the light emission. For example, the cladding can be formed as a filter that changes the color temperature or color of the emitted light.
The manufacturing method for the automobile headlamp according to the present invention includes the steps of:
providing a system comprising: at least one incandescent filament having a first incandescent filament end and a second incandescent filament end; a first feeder line; a second feeder line; a first metal foil; and a second metal foil, wherein the first incandescent filament end is connected to the first metal foil by means of a first feed line and the second incandescent filament end is connected to the second metal foil by means of a second feed line, and wherein the first feed line is fixed only at the first incandescent filament end and at the first metal foil and the second feed line is fixed only at the second incandescent filament end and at the second metal foil;
placing the system in the interior of a quartz glass tube;
heating and softening the quartz glass tube in the region of the metal foil;
the quartz glass tube is pressed and sealed in the region of the metal foil, so that the metal foil is completely embedded in the quartz glass and forms the sealed end of the lamp vessel.
By the manufacturing method according to the present invention, an incandescent lamp having a reduced outer dimension and an incandescent lamp in which the shock resistance of the incandescent filament of the incandescent lamp or the shock resistance of the incandescent filament support is improved are realized.
Advantageously, the production method according to the invention comprises the additional method step of removing softened quartz glass from a surface region during pressing of the quartz glass tube, which surface region is arranged between the feed line and the connection point of the respective metal foil. Thereby ensuring that: during or by the pressing process, only a small force acts on the connection points of the power supply lines and the metal foils, and the connection between the power supply lines and the respective metal foils is not impaired by the pressing process.
The production method according to the invention preferably comprises a method step in which a web structure is formed from softened quartz glass on the surface of the sealed end of the lamp vessel. Preferably, the web structure comprises a cruciform web means for the reasons already set forth above.
Drawings
The present invention will be described in detail below with reference to examples. The figures show:
fig. 1 shows a side view of a halogen incandescent lamp without a lamp base according to a preferred embodiment of the invention;
FIG. 2 shows a longitudinal section through the halogen incandescent lamp depicted in FIG. 1 along a section plane B-B running perpendicular to the drawing plane and parallel to the longitudinal axis of the lamp;
fig. 3 shows a cross-sectional view through the halogen incandescent lamp depicted in fig. 1 along a sectional plane a-a running perpendicular to the drawing plane and perpendicular to the longitudinal axis of the lamp;
FIG. 4 shows an enlarged partial view of the cross-section depicted in FIG. 3;
fig. 5 shows an enlarged view of the sealed end of the lamp vessel in the halogen incandescent lamp depicted in longitudinal section in fig. 2;
fig. 6 shows a side view of the halogen incandescent lamp depicted in fig. 1 with a lamp base;
fig. 7 shows a prefabricated system comprising a coiled filament, a feed line for the coiled filament, a molybdenum foil and an external feed, and a quartz glass tube.
Detailed Description
Fig. 1 to 6 show details of an incandescent lamp according to a preferred embodiment.
The incandescent lamp is a halogen incandescent lamp 1 of ECE type H7. The halogen incandescent lamp is used as a light source in a motor vehicle headlight, for example for generating a low beam, a high beam or a fog light.
The halogen incandescent lamp 1 has a lamp vessel 10, a coiled filament 20 arranged within the lamp vessel, a base 30 provided with electrical connections 31, 32 of the halogen incandescent lamp 1, and supply elements 23, 24, 25, 26, 27, 28 for supplying and supporting the coiled filament 20.
The lamp vessel 10 is made of SiO2The fraction is 99.45 percent by weight of quartz glass. Additionally, the quartz glass contains 0.39 weight percent Ce2O30.12% by weight of Al2O3And 0.04 weight percent TiO2. The quartz glass is known under the trademark OVISIL. The lamp vessel 10 has a hollow-cylindrical lamp vessel section 100, and a lamp vessel dome 101 which is arranged at a first end of the cylindrical lamp vessel section 100 and has a sealed end 102 provided with current leads, which is arranged at a second end of the cylindrical lamp vessel section 100 and is also referred to subsequently as a press seal 102. The lamp vessel 10 is hermetically closed by means of a lamp vessel top 101 and a press seal 102. The cylindrical lamp vessel section 100 has an outer diameter of 9.8mm ± 0.15mm and a wall thickness of 1 mm. A gas filling comprising halogen and an inert gas, for example xenon, krypton or argon or a mixture of these inert gases, is enclosed in the interior space of the lamp vessel. The lamp vessel top 101 is provided with a light-tight coating.
The coiled filament 20 is formed by a tungsten wire, and the ends 21, 22 of the coiled filament are respectively covered by molybdenum foils 210, 220 serving as welding aids. The incandescent filament 20 is arranged in the interior of the lamp vessel 10 in the region of the cylindrical lamp vessel section 100, and the winding axis of the incandescent filament 20 is oriented parallel to the cylindrical axis 103 of the cylindrical lamp vessel section 100. The cylinder axis 103 is also referred to as the longitudinal axis of the lamp or lamp vessel.
The feeding elements for supplying and supporting the coiled filament 20 include a first feeding line 23 made of molybdenum, a second feeding line 24 made of molybdenum, a first molybdenum melt foil 25, a second molybdenum melt foil 26, a first external feeding portion 27, and a second external feeding portion 28.
The first coiled-filament end 21 is welded to the first end 231 of the first current supply line 23 by means of the first welding aid 210. The second end 232 of the first power feed line 23 overlaps the first molybdenum melt foil 25 and is welded to the first molybdenum melt foil 25 in the overlapping region. The first molybdenum melt foil 25 is welded to the first feeding external portion 27. The first external feeding leg 27 protrudes from the press seal 102 of the lamp vessel 10 and is welded to the first electrical connection 31 of the halogen incandescent lamp 1. The above-mentioned current supply elements 23, 25, 27 form gas-tight current leads through the press seal 102 of the lamp vessel 10 for electrically contacting the first spiral filament end 21. The first feed line 23 extends within the lamp vessel 10. The first molybdenum melt foil 25 is completely embedded in the quartz glass of the press seal 102 and makes a gas-tight, electrically conductive connection between the first supply line 23 and the first external supply line 27. The first molybdenum melt foil 25 is thus an integral part of a gastight first current lead through the press seal 102 of the lamp vessel 10.
The second coiled-filament end 22 is welded to the first end 241 of the second current supply line 24 by means of the second welding aid 220. The second end 242 of the second power supply line 24 overlaps the second molybdenum melt foil 26 and is welded to the second molybdenum melt foil 26 in the overlapping region. The second molybdenum melt foil 26 is welded to the second external feeding portion 28. The second external feeding leg 28 protrudes from the press seal 102 of the lamp vessel 10 and is soldered to the second electrical connection 32 of the halogen incandescent lamp 1. The above-mentioned current supply elements 24, 26, 28 form gastight current leads through the press seal 102 of the lamp vessel 10 for electrically contacting the second spiral filament end 22. A second supply line 24 extends within the lamp vessel 10. The second molybdenum melt foil 26 is completely embedded in the quartz glass of the press seal 102 and makes a gas-tight, electrically conductive connection between the second supply line 24 and the second external supply line 28. The second molybdenum melt foil 26 is thus an integral part of the gastight second current lead through the press seal 102 of the lamp vessel 10.
The two molybdenum melt foils 25, 26 are embedded in the quartz glass of the press seal 102 at a distance from one another, so that the surfaces of these molybdenum melt foils are arranged in a common plane. The longitudinal edge 251 of the first molybdenum melt foil 25 facing the edge of the pressure seal 102 is formed in a bent manner in order to increase its bending strength during handling of the bearing or feed system 2. Similarly, the longitudinal edge 261 of the second molybdenum melt foil 26 facing the edge of the pressure seal 102 is also formed in a bent manner in order to increase the bending strength of this longitudinal edge. During the production of the press seal 102, the bent longitudinal edges 251, 261 of the two molybdenum melt foils 25, 26 are bent back again by means of a pressing tool into the plane of the respective molybdenum melt foil 25 or 26, so that the longitudinal edges 251, 261 are no longer bent after the press seal 102 has been produced.
The press seal 102 of the lamp vessel 10 has an H-shaped profile in a cross-section perpendicular to the longitudinal lamp axis 103, i.e. in a cross-sectional plane a-a (fig. 3). That is to say, the press seal 102 has four edge webs 104, 105, 107 running parallel to the longitudinal axis 103 of the lamp, which are integral parts of the edge of the press seal 102. The surface of the press seal 102 has a recess 11 and a web structure on two sides lying opposite one another.
The first recess 11 is arranged in the surface on the first side of the press seal 102 in a region between the overlapping region of the first power feed line 23 and the first molybdenum melt foil 25 and the overlapping region of the second power feed line 24 and the second molybdenum melt foil 26.
Similarly, a second recess (not shown) is arranged in the surface on the opposite second side of the press seal 102 in the region between the overlapping region of the first supply line 23 and the first molybdenum melt foil 25 and the overlapping region of the second supply line 24 and the second molybdenum melt foil 26.
The first web structure provided on the surface of the first side of the press seal 102 comprises a first cross-shaped web arrangement 131, 132 and two first longitudinal webs 133, 134 and two first transverse webs 135, 136. A first cruciform web arrangement 131, 132 is arranged centrally between the edge webs 104, 105 and is formed by a first web 131, which runs parallel to the cylinder axis or the lamp vessel longitudinal axis 103, and a second web 132, which runs perpendicular to the first web 131. The two first longitudinal webs 133, 134 each run parallel to the longitudinal lamp vessel axis 103 and are arranged at a distance from one another and from the edge webs 104, 105 in the region of the overlap of the first current supply line 23 and the first molybdenum melt foil 25 or in the region of the overlap of the second current supply line 24 and the second molybdenum melt foil 26. The two first transverse webs 135, 136 run along a common line perpendicular to the longitudinal lamp vessel axis 103 and extend from the respective edge web 104 or 105 in the direction of the middle of the first side on the surface of the press seal 102. The two first transverse webs 135, 136 are spaced apart from one another and are arranged on a first side of the surface of the press seal 102 in the region between the first longitudinal webs 133, 134 and the first cross-shaped web means 131, 132. The two first longitudinal webs 133, 134 and the two first transverse webs 135, 136 bound the first recess 11 in two directions perpendicular to the longitudinal axis 103 of the lamp vessel, and the first cross-shaped web means 131, 132 bound the first recess 11 in a direction parallel to the longitudinal axis 103 of the lamp vessel. The first recess 11 is delimited in opposite directions parallel to the longitudinal lamp vessel axis 103 by a transition section to the cylindrical lamp vessel section 100.
The second tab arrangement provided on the surface of the second side of the press seal 102 comprises one twentieth-shaped tab means 141, 142 and two second longitudinal tabs and two second transverse tabs 145. The twenty-first web means 141, 142 are arranged centrally between the edge webs and are formed by a first web 141 running parallel to the cylinder axis or lamp vessel longitudinal axis 103 and a second web 142 running perpendicular to the first web 141. The two second longitudinal webs each run parallel to the longitudinal lamp vessel axis 103 and are arranged spaced apart from one another and from the edge webs in the overlap region of the first current supply line 23 and the first molybdenum melt foil 25 or in the overlap region of the second current supply line 24 and the second molybdenum melt foil 26. The two first crosspieces 145 run along a common line perpendicular to the longitudinal lamp vessel axis 103 and extend from the respective edge web 107 in the direction of the middle of the second side over the surface of the press seal 102. The two second transverse webs 145 are spaced apart from one another and are arranged on the second side of the surface of the press seal 102 in the region between the second longitudinal web and the second chevron-shaped web arrangement 141, 142. The two second longitudinal webs and the two second transverse webs 145 delimit the second recess (not shown) in two directions perpendicular to the longitudinal axis 103 of the lamp vessel, and the second indentation is delimited by the second chevron-shaped web means 141, 142 in a direction parallel to the longitudinal axis 103 of the lamp vessel. The second recess is delimited in the opposite direction parallel to the longitudinal lamp vessel axis 103 by a transition section to the cylindrical lamp vessel section 100. The press seal 102 is of symmetrical design, i.e. the two opposite sides of the press seal 102 are of identical design, and it has a first and a second recess and a first and a second web structure.
The base 30 has an annular metallic base sleeve 33 for receiving and fixing the press seal 102 in the base 30 and a disc-shaped metallic base flange 34 molded onto the base for mounting the halogen incandescent lamp 1 in a motor vehicle headlight. The base 30 furthermore has a base substrate 35 of an electrically insulating material for fixing the electrical connections 31, 32 and the external supply connections 27, 28 soldered thereto.
For the production of the halogen incandescent lamp 1, a prefabricated and installed system 2 (fig. 7) is provided, which comprises the incandescent filament 20 and the supply and support elements 210, 220, 23, 24, 25, 26, 27 and 28 of the incandescent filament. The system 2 is introduced as a prefabricated and mounted structural unit into the open end 1081 of the quartz glass tube 108 provided, so that the free ends of the external feeding connections 27, 28 protrude from the opening of the quartz glass tube 108. The quartz glass tube 108 is heated in the region of the molybdenum melt foils 25, 26, so that the quartz glass softens in this region. The quartz glass tube 108 is pressed in the softened region by means of a pressing tool in the shape of two pressing jaws (not shown) lying opposite one another, so that the softened quartz glass lies against the molybdenum melt foils 25, 26 and the molybdenum melt foils 25, 26 are completely embedded in the softened quartz glass. After the softened quartz glass has hardened, the quartz glass tube 108 is closed in a gastight manner in the region of the molybdenum melt foils 25, 26, and this closed end of the quartz glass tube 108 forms the press seal 102 of the halogen incandescent lamp 1. The shape of the web structure on the surface of the press seal 102 and the recess 11 are determined by the shape of the press jaw. In particular, by means of the pressing tool, the quartz glass material softened during the pressing is extruded out of the region of the depression 11, i.e. the surface region provided between the overlapping region of the first power feed line 23 and the first metal foil 25 and the overlapping region of the second power feed line 24 and the second metal foil 26, and is used to shape the tab structure. The press seal 102 thus has a smaller thickness in the region of the recess 11 than outside the recess. At the other open end 1082 of the quartz glass tube 108 a pump guide tube 109 is arranged for introducing the filling gas and the halogen into the inner space of the quartz glass tube 108 and of the lamp vessel 10. After the introduction of the above-mentioned filler, the pump guide tube 109 is sealed and melted, and thereby the end 1082 of the quartz glass tube 108 is sealed. The lamp vessel top 101 of the lamp vessel 10 of the halogen incandescent lamp 1 is formed by the remaining residue of the molten pump-guide tube 109 and the end 1082 of the quartz glass tube 108.
By means of the invention, in the H7 lamp according to the above-described embodiment, the spacing between the press seal 102 and the coiled filament 20 is reduced by 4mm compared to a conventional H7 lamp with a quartz glass lamp vessel.
The invention is not limited to the embodiments explained in detail above, but can also be applied to other halogen incandescent lamps of automotive headlamps, in particular other ECE-type halogen incandescent lamps.
List of reference numerals
1 halogen incandescent lamp
10 Lamp vessel
100 cylindrical lamp vessel section
101 lamp container top
102 press seal, sealed end
103 cylinder axis, longitudinal axis of lamp vessel, longitudinal axis of lamp
104. 105 edge tab
107 edge tab
108 quartz glass tube
1081. 1082 end part of quartz glass tube
109 pump guide tube
11 first recess
131. 132 first cross shaped tag means
133. 134 first longitudinal tab
135. 136 first cross tab
141. 142 twentieth shaped splicing device
145 second cross-piece
2 System
20 spiral filament
21 first spiral filament end
210 first welding aid, first molybdenum foil
22 second spiral filament end
220 second welding aid, second molybdenum foil
23 first feeder line
231 first end of first feed line
232 second end of the first feed line
24 second feeder line
241 first end of a second feed line
242 second end of the second feed line
25 first molybdenum melt foil
251 bent longitudinal edge
26 second molybdenum melt foil
261 bent longitudinal edge
27 first external feeding section
28 second external feeding portion
30 lamp holder
31. 32 electric connector
33 socket sleeve
34 lamp holder flange
35 a base substrate.
Claims (10)
1. An incandescent lamp (1) for a motor vehicle headlight, having a lamp vessel (10) made of quartz glass, which surrounds at least one incandescent filament (20) and which has at least one sealed end (102) equipped with current leads for supplying the at least one incandescent filament (20), wherein the current leads comprise a first metal foil (25) and a second metal foil (26), which are each embedded in the sealed end (102) of the lamp vessel (10), and the at least one incandescent filament (20) has a first incandescent filament end (21) and a second incandescent filament end (22), wherein the first incandescent filament end (21) is connected to the first metal foil (25) by means of a first current supply line (23), and the second incandescent filament end (22) is connected to the second metal foil (26) by means of a second current supply line (24), and wherein the first and second supply lines (23, 24) are fixed only at the respective first and second incandescent filament ends (21, 22) and at the respective first and second metal foils (25, 26) in the sealed end (102) of the lamp vessel (10), the surface of the sealed end (102) of the lamp vessel (10) has at least one recess (11), the recesses are arranged in a region between a superposition or connection region of the first supply line (23) and the first metal foil (25) and a superposition or connection region of the second supply line (24) and the second metal foil (26).
2. An incandescent lamp as claimed in claim 1, wherein the surface of the sealed end (102) of the lamp vessel (10) has at least one tab structure.
3. An incandescent lamp as claimed in claim 2, wherein the at least one tab structure comprises a cross-shaped tab arrangement (131, 132; 141, 142).
4. An incandescent lamp according to any of claims 1 to 3, wherein the lamp vessel (10) has a cylindrical lamp vessel section (100) which surrounds the at least one incandescent filament (20) and has an outer diameter having a value of less than 10 mm.
5. A filament lamp according to any of the claims 1 to 3, wherein the first metal foil (25), the second metal foil (26) are molybdenum foils.
6. The incandescent lamp of any of claims 1 to 3, wherein the first and second power supply lines (23, 24) are molybdenum wires.
7. An incandescent lamp according to any of claims 1 to 3, wherein the at least one incandescent filament (20) is formed as a coiled filament of tungsten wire.
8. A method for producing an incandescent lamp (1) for a motor vehicle headlight, wherein the method comprises the following steps:
providing a system (2) comprising: at least one incandescent filament (20) having a first incandescent filament end (21) and a second incandescent filament end (22); a first feeder line (23); a second feeder line (24); a first metal foil (25); and a second metal foil (26), wherein the first incandescent filament end (21) is connected to the first metal foil (25) by means of the first current feed (23) and the second incandescent filament end (22) is connected to the second metal foil (26) by means of the second current feed (24), and wherein the first current feed (23) is fixed only at the first incandescent filament end (21) and at the first metal foil (25) and the second current feed (24) is fixed only at the second incandescent filament end (22) and at the second metal foil (26);
-arranging the system (2) in the interior of a quartz glass tube (108);
-heating and softening the quartz glass tube (108) in the region of the first metal foil (25), the second metal foil (26);
-pressing and sealing the quartz glass tube (108) in the area of the first and second metal foils (25, 26) such that the first and second metal foils (25, 26) are completely embedded in the quartz glass and form a sealed end (102) of the lamp vessel (10), -removing the softened quartz glass from the surface area during pressing of the quartz glass tube (108), which surface area is provided between the first and second supply lines (23, 24) and the superposition or connection area of the respective first and second metal foils (25, 26).
9. The method according to claim 8, wherein at least one tab structure is formed from the softened quartz glass on the surface of the sealed end (102) of the lamp vessel (10).
10. The method according to claim 9, wherein the at least one tab structure comprises a cruciform tab arrangement (131, 132; 141, 142).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018201068.4A DE102018201068B4 (en) | 2018-01-24 | 2018-01-24 | BULB FOR VEHICLE HEADLIGHTS AND MANUFACTURING PROCESSES |
| DE102018201068.4 | 2018-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110071032A CN110071032A (en) | 2019-07-30 |
| CN110071032B true CN110071032B (en) | 2021-09-14 |
Family
ID=67145040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810134386.3A Expired - Fee Related CN110071032B (en) | 2018-01-24 | 2018-02-09 | Incandescent lamp for a motor vehicle headlight and method for producing the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110071032B (en) |
| DE (1) | DE102018201068B4 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3736454A (en) * | 1970-04-11 | 1973-05-29 | Philips Corp | Electric filament lamp or discharge lamp |
| US4703221A (en) * | 1986-04-18 | 1987-10-27 | Ochoa Carlos G | Electric lamp and method of making |
| US4843276A (en) * | 1986-02-25 | 1989-06-27 | U.S. Philips Corporation | Electric incandescent lamp assembly having simplified construction |
| DE102007059340A1 (en) * | 2006-12-19 | 2008-06-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Power supply system for spiral-wound filaments of e.g. halide lamp, has filaments provided with inputs, and foils assigned to filaments and having dimensions which are adapted to inputs of assigned spiral-wound filaments |
| DE102007003491A1 (en) * | 2007-01-24 | 2008-07-31 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | lamp |
| DE202007009118U1 (en) * | 2007-06-29 | 2008-08-07 | Osram Gesellschaft mit beschränkter Haftung | Electric lamp with a laser-structured power supply |
-
2018
- 2018-01-24 DE DE102018201068.4A patent/DE102018201068B4/en not_active Expired - Fee Related
- 2018-02-09 CN CN201810134386.3A patent/CN110071032B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3736454A (en) * | 1970-04-11 | 1973-05-29 | Philips Corp | Electric filament lamp or discharge lamp |
| US4843276A (en) * | 1986-02-25 | 1989-06-27 | U.S. Philips Corporation | Electric incandescent lamp assembly having simplified construction |
| US4703221A (en) * | 1986-04-18 | 1987-10-27 | Ochoa Carlos G | Electric lamp and method of making |
| DE102007059340A1 (en) * | 2006-12-19 | 2008-06-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Power supply system for spiral-wound filaments of e.g. halide lamp, has filaments provided with inputs, and foils assigned to filaments and having dimensions which are adapted to inputs of assigned spiral-wound filaments |
| DE102007003491A1 (en) * | 2007-01-24 | 2008-07-31 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | lamp |
| DE202007009118U1 (en) * | 2007-06-29 | 2008-08-07 | Osram Gesellschaft mit beschränkter Haftung | Electric lamp with a laser-structured power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018201068B4 (en) | 2020-08-20 |
| DE102018201068A1 (en) | 2019-07-25 |
| CN110071032A (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100302532B1 (en) | Cap type electric lamp | |
| CA2555490A1 (en) | Vehicle headlight | |
| US4463277A (en) | Compact halogen-cycle incandescent lamp, and lamp unit utilizing such lamp as a light source | |
| HU222629B1 (en) | Electric lamp | |
| US3617797A (en) | Pinch-base electric lamp with transversely arranged supply wires | |
| KR100473699B1 (en) | Method for manufacturing an electric light bulb | |
| JPH0711945B2 (en) | A discharge lamp with a cap for headlights | |
| US8084928B2 (en) | Halogen incandescent lamp incorporating two filaments for daylight operation | |
| US7456558B2 (en) | Electric incandescent lamp provided with different pitch factors for each end of a filament component | |
| CN110071032B (en) | Incandescent lamp for a motor vehicle headlight and method for producing the same | |
| CN103797560A (en) | Efficient halogen lamp | |
| US4658177A (en) | Electric lamp with oriented current conductors extending through a press seal | |
| US5006757A (en) | Incandescent lamp | |
| JP2569227B2 (en) | Halogen lamp sealed on both sides | |
| US6400077B1 (en) | Electric incandescent lamp | |
| KR101119388B1 (en) | Electric incandescent lamp | |
| JP5074517B2 (en) | Shading cap with filament | |
| US8692462B2 (en) | Halogen bulb for vehicle headlights | |
| US20050110413A1 (en) | Method for producing an electric lamp, and an electric lamp | |
| JPH0328776B2 (en) | ||
| KR20090015914A (en) | High-pressure gas discharge lamp having electrode rods with crack-initiating means | |
| US20030127980A1 (en) | Halogen incandescent lamp | |
| JP2006080088A (en) | Incandescent lamp | |
| WO2006000971A2 (en) | Electric lamp | |
| JPH08510357A (en) | High pressure discharge lamp and method of manufacturing high pressure discharge lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210914 |