EP0992738B1 - Vehicle headlamp with double-walled shade - Google Patents
Vehicle headlamp with double-walled shade Download PDFInfo
- Publication number
- EP0992738B1 EP0992738B1 EP19990119737 EP99119737A EP0992738B1 EP 0992738 B1 EP0992738 B1 EP 0992738B1 EP 19990119737 EP19990119737 EP 19990119737 EP 99119737 A EP99119737 A EP 99119737A EP 0992738 B1 EP0992738 B1 EP 0992738B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall portion
- side wall
- headlamp
- double
- shade
- 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 - Lifetime
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Classifications
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- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
- F21S41/435—Hoods or cap-shaped
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- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/47—Attachment thereof
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- 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
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
- F21W2103/10—Position lights
Definitions
- the invention relates to a headlamp for vehicles with the features according to the preamble of claim 1.
- Such a headlamp for vehicles is known from DE 195 14 085 A1.
- the headlight has a cup-shaped housing made of plastic, which is closed on its front by a lens.
- a plastic existing, cup-shaped reflector is arranged in the housing interior.
- an opening for receiving a light bulb is introduced in the apex region of the reflector.
- the bulb dips with its glass bulb in a cup-shaped aperture.
- a lid which is connected via a bending tab integrally with the peripheral side wall of the panel.
- the lid adjoins with its outer edge portion of the lens facing the outer edge of the side wall.
- the panel is made of sheet metal and in practice is usually made of sheet steel, so that the panel withstands the high heat load through the bulb.
- the cup-shaped panel is connected via three arm-shaped support elements with the reflector.
- the side wall of the panel is punched out of sheet metal and rolled into a hollow body and has a seam formed by blunt, juxtaposed edges.
- the disadvantage here is that the interior of the headlamp appears inhomogeneous because of the existing sheet steel panel in an optically clear lens. In the case of a cover made of sheet steel and chrome-plated on the outside, the chromium plating turns on when the heat load is high.
- a headlamp for vehicles in which a diaphragm arranged between a reflector and a lens has a double-walled side wall.
- the outer wall part of the double-walled side wall is connected via two support elements to a reflector, wherein the inner wall part is connected via a support element near the reflector with the support elements of the outer wall part and is designed substantially smaller than the outer wall part. Therefore, there is an air layer between the two wall parts and the wall parts are interconnected only via the support elements. It is disadvantageous that both the outer and the inner wall part are held on support elements and thus both wall parts must consist of a dimensionally stable heavy material.
- the light rays coming directly from the light source exiting from the light source and reflected by the reflector strike the outer edge region of the outer wall part, through which a chromium plating on the outside of the outer wall part can start in color.
- a single-walled cup-shaped aperture has a bottom which adjoins with its free edge portion of a circumferential side wall of the diaphragm, wherein the bottom and the side wall of the cup-shaped aperture consist of the same metal sheet ,
- the cover may be made of a different material than the side wall of the panel, but the outer edge section of the peripheral side wall of the cup-shaped panel is disturbingly visible from the outside.
- the object of the invention is to improve the headlamp described in the preamble of claim 1 such that the entire outer side of a double-walled side wall having cup-shaped aperture of an outer bare surface having and easily deformable sheet is determined and still for the cup-shaped aperture high heat resistance and dimensional stability is given.
- This object is achieved according to the invention by the features of the characterizing part of claim 1.
- the entire outer side of the diaphragm can be formed by a metal sheet, which after molding has a smooth outer side, does not have to contribute to the dimensional stability of the cup-shaped diaphragm and in which permanent tarnishing on the smooth outer side of the diaphragm occur only at temperatures which are higher than on chromed sheet steel.
- a metal sheet for the aperture is particularly suitable a light metal sheet with a shiny silver-colored surface, which serves as the outside of the panel.
- the light metal sheet is advantageously made of aluminum or an aluminum alloy, wherein the shiny silver surface is protected by a film.
- the glossy surface forms the outside of the cup-shaped aperture. After forming the outer wall portion and the bottom of the panel, the film is first removed. This will not damage the outside of the bezel during molding.
- a very deep design of the cup-shaped aperture is possible if the outer and inner circumferential wall portion of the side wall in each case a seam which extends from the outer rim facing the reflector to the outer rim facing the lens.
- the outer wall part must not be deep-drawn, but can be rolled. During deep drawing, an undesirable matt surface is formed on the outside of the outer wall part.
- By rolling the smooth surface of the outer wall portion is maintained even if the circumferential side wall of the cup-shaped aperture is almost cylindrical.
- the aperture is very small in a cylindrical shape. As a result, the optically effective reflection surface of the reflector in the region of its apex can be as large as possible.
- the dimensional stability of the diaphragm is particularly great when the inner and outer wall part is frustoconical.
- the panel has a homogeneous appearance from the outside, when the inner and outer wall part has a common edge. In this case, only the inner wall part of the side wall is used for shading of light rays emerging directly from the light source.
- the inner wall part consists of sheet steel and has a matte inner surface.
- the matt inner surface can be formed by a black finish.
- a high light absorption is given, and thus no disturbing light rays caused by reflection within the diaphragm.
- For the panel is given a high dimensional stability, since it is made of sheet steel.
- the bottom of the panel must not be double-walled, since the cap directly shields light rays emerging from the light source from the ground.
- the support element of the panel is double-walled and each part of the support element is integrally connected to one of the seam delimiting edges of the inner wall part, wherein the support member passes through a slot of the outer wall portion and the slot laterally only to the reflector is open.
- the outer wall part is firmly connected to portions of its outer edges by small indentations with the inner wall part.
- the outer wall part of the double-walled side wall in a portion in which the edges of a seam of the outer wall part abut each other, is non-detachably connected to each other.
- the headlight has an outer housing made of plastic, which is closed by a largely optic-free lens (not shown).
- an outer housing made of plastic, which is closed by a largely optic-free lens (not shown).
- shell-shaped reflector (1) In the interior of the outer housing, at least one consisting of plastic, shell-shaped reflector (1) is arranged.
- an opening (17) for receiving a light source (3) is introduced in the region of its apex.
- the light source (3) is an incandescent lamp which is inserted with its glass bulb (18) ahead through the opening (17) of the reflector (1) until the incandescent lamp with its plate-shaped base (19) at the outer edge region of the opening (17) is applied.
- the base (19) is through a holding device, not shown, held on the back of the reflector (1).
- the incandescent lamp has an incandescent filament, which is arranged in a focal region of the dish-shaped reflector (1).
- the glass bulb of the incandescent lamp has at its front free end portion a blackened cap (20) to shield directly from the light source (3) emerging light rays from the back. So that front edge portions of the reflector (1) are shielded from light rays which emerge directly from the light source (3), the glass bulb (18) with its free end dips into a cup-shaped diaphragm (2), which is supported by a support element (6). connected to the reflector (1).
- the cup-shaped panel (2) has circumferentially a double-walled side wall (5) and a bottom (4), which is formed by a lid.
- the inner wall part (10) of the double-walled side wall (5) consists of a steel sheet whose inside is painted black. The black coating serves to absorb the light rays of the light source (3) which occur on the inside of the inner wall part (10).
- the inner wall portion (10) is shown unwound and has at its opposite edges (14) each have a support arm, which is doubled the support element (6). After rolling the inner wall part (10), the edges (14) delimit a seam (16) which also extends between the two support arms of the doubled support element (6).
- the outer wall part (9) and the serving as a lid bottom (4) of the diaphragm (2) according to Figures 2 and 6 and 7 are formed from a light metal sheet, the outside of the cup-shaped aperture (2) forming surface high gloss and silver is.
- the high-gloss surface is protected by a peel-off film. The film is pulled off only after the molding of the outer wall part (9) and the bottom (4).
- the outer wall part (9) is rolled as well as the inner wall part (10) and lies flat against the inner Wall part (10).
- the outer wall part (9) has retaining lugs (21) on the edge (7) facing the reflector (1), which are bent around the outer edge (7) of the inner wall part (10) according to FIG. 5 and the outer wall part (9 ) on the inner wall part (10).
- the outer wall part (9) is held at its front edge (12) by indentations (not shown) which engage in the surface of the inner wall part (10) on the inner wall part (10).
- the inner and outer wall part (10 and 9) circumferentially on a step in which a lateral edge portion (8) of the bottom (4) is arranged.
- the lateral edge portion (8) extends with its outer side flush with the outside of the adjacent outer wall part (9).
- the bottom (4) serving lid is also held captive by not shown indentations on the outer wall part (9).
- the inner and outer wall part (10 and 9) have circumferentially on a common edge (7). In this case, only the edge (7) of the inner wall part (10) is used for shadowing of light rays emerging directly from the light source (3).
- the bottom (4) of the cup-shaped aperture (2) does not have to be double-walled, like its side wall (5), because of the blackened cap (20) of the glass bulb (18) of the light source (3) the bottom opposite directly from the light source (3 ) emerging light rays is shielded.
- the unwinding shown in FIG. 7 is the outer wall part (9) and the bottom (4) of the cup-shaped panel (3).
- the bottom (4) via a bending tab (13) is integrally connected to the outer wall part (9).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
Die Erfindung betrifft einen Scheinwerfer für Fahrzeuge mit den Merkmalen nach dem Oberbegriff des Anspruchs 1.The invention relates to a headlamp for vehicles with the features according to the preamble of
Ein solcher Scheinwerfer für Fahrzeuge ist aus der DE 195 14 085 A1 bekannt. Der Scheinwerfer weist ein aus Kunststoff bestehendes topfförmiges Gehäuse auf, welches auf seiner Vorderseite durch eine Lichtscheibe abgeschlossen ist. Im Gehäuse-Inneren ist ein aus Kunststoff bestehender, schalenförmiger Reflektor angeordnet. In den Scheitelbereich des Reflektors ist eine Öffnung zur Aufnahme einer Glühlampe eingebracht. Die Glühlampe taucht mit ihrem Glaskolben in eine becherförmige Blende ein. Als Boden der becherförmigen Blende dient ein Deckel, der über eine Biegelasche einstückig mit der umlaufenden Seitenwand der Blende verbunden ist. Der Deckel grenzt mit seinem äußeren Randabschnitt an den der Lichtscheibe zugewandten äußeren Rand der Seitenwand an. Die Blende ist aus Blech hergestellt und besteht in der Praxis meistens aus Stahlblech, damit die Blende der hohen Wärmebelastung durch die Glühlampe standhält. Die becherförmige Blende ist über drei armförmige Tragelemente mit dem Reflektor verbunden. Die Seitenwand der Blende ist aus Blech ausgestanzt und zu einem Hohlkörper gerollt und weist eine Naht auf, die durch stumpf voreinanderliegenden Ränder gebildet ist. Nachteilig hierbei ist, daß bei einer optikfreien Lichtscheibe das Innere des Scheinwerfers wegen der aus Stahlblech bestehenden Blende inhomogen erscheint. Bei einer Blende, welche aus Stahlblech besteht und auf der Außenseite verchromt ist, läuft die Verchromung bei einer hohen Wärmebelastung farbig an.Such a headlamp for vehicles is known from DE 195 14 085 A1. The headlight has a cup-shaped housing made of plastic, which is closed on its front by a lens. In the housing interior, a plastic existing, cup-shaped reflector is arranged. In the apex region of the reflector, an opening for receiving a light bulb is introduced. The bulb dips with its glass bulb in a cup-shaped aperture. As the bottom of the cup-shaped aperture is a lid which is connected via a bending tab integrally with the peripheral side wall of the panel. The lid adjoins with its outer edge portion of the lens facing the outer edge of the side wall. The panel is made of sheet metal and in practice is usually made of sheet steel, so that the panel withstands the high heat load through the bulb. The cup-shaped panel is connected via three arm-shaped support elements with the reflector. The side wall of the panel is punched out of sheet metal and rolled into a hollow body and has a seam formed by blunt, juxtaposed edges. The disadvantage here is that the interior of the headlamp appears inhomogeneous because of the existing sheet steel panel in an optically clear lens. In the case of a cover made of sheet steel and chrome-plated on the outside, the chromium plating turns on when the heat load is high.
aus der GB-A-1 301 768 ist ein Scheinwerfer für Fahrzeuge bekannt, bei dem eine zwischen einem Reflektor und einer Lichtscheibe angeordnete Blende eine doppelwandige Seitenwand aufweist. Der äußere Wandteil der doppelwandigen Seitenwand ist über zwei Tragelemente mit einem Reflektor verbunden, wobei der innere Wandteil über ein Tragelement nahe dem Reflektor mit den Tragelementen des äußeren Wandteils verbunden ist und wesentlich kleiner als der äußere Wandteils ausgeführt ist. Deshalb besteht zwischen beiden Wandteilen ein Luftschicht und die Wandteile sind nur über die Tragelemente miteinander verbunden. Hierbei ist es nachteilig, dass sowohl der äußere als auch der innere Wandteil über Tragelemente gehalten sind und somit beide Wandteile aus einem formstabilen schweren Werkstoff bestehen müssen. Weiterhin treffen wegen der Luftschicht zwischen den Wandteilen auf den äußeren Randbereich des äußeren Wandteils direkt aus der Lichtquelle austretende und vom dem Reflektor reflektierte Lichtstrahlen auf, durch die eine Verchromung auf der Außenseite des äußeren Wandteils farbig anlaufen kann.From GB-A-1 301 768 a headlamp for vehicles is known in which a diaphragm arranged between a reflector and a lens has a double-walled side wall. The outer wall part of the double-walled side wall is connected via two support elements to a reflector, wherein the inner wall part is connected via a support element near the reflector with the support elements of the outer wall part and is designed substantially smaller than the outer wall part. Therefore, there is an air layer between the two wall parts and the wall parts are interconnected only via the support elements. It is disadvantageous that both the outer and the inner wall part are held on support elements and thus both wall parts must consist of a dimensionally stable heavy material. Furthermore, because of the air layer between the wall parts, the light rays coming directly from the light source exiting from the light source and reflected by the reflector strike the outer edge region of the outer wall part, through which a chromium plating on the outside of the outer wall part can start in color.
Bei dem aus der US-A-5 567 033 bekannten Scheinwerfer für Fahrzeuge weist eine einwandige becherförmige Blende einen Boden auf, der mit seinem freien Randabschnitt an eine umlaufende Seitenwand der Blende angrenzt, wobei der Boden und die Seitenwand der becherförmigen Blende aus demselben Blech bestehen.In the known from US-A-5 567 033 headlights for vehicles, a single-walled cup-shaped aperture has a bottom which adjoins with its free edge portion of a circumferential side wall of the diaphragm, wherein the bottom and the side wall of the cup-shaped aperture consist of the same metal sheet ,
Bei den aus der DE 197 53 973 A1 und DE 196 54 225 A1 bekanntgewordenen Scheinwerfern kann zwar der Deckel aus einem anderen Material als die Seitenwand der Blende hergestellt sein, jedoch ist der äußere Randabschnitt der umlaufenden Seitenwand der becherförmigen Blende von außen störend sichtbar.In the case of the headlights disclosed in DE 197 53 973 A1 and DE 196 54 225 A1, the cover may be made of a different material than the side wall of the panel, but the outer edge section of the peripheral side wall of the cup-shaped panel is disturbingly visible from the outside.
Aufgabe der Erfindung ist es, den im Oberbegriff des Anspruchs 1 beschriebenen Scheinwerfer derart zu verbessern, daß die gesamte Außenseite der eine doppelwandige Seitenwandaufweisenden becherförmigen Blende von einem eine außere blanke Oberfläche aufweisenden und leicht verformbaren Blech bestimmt ist und trotzdem für die becherförmige Blende eine hohe Wärmebelastbarkeit und Formstabilität gegeben ist. Diese Aufgabe wird nach der Erfindung durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Dadurch kann die gesamte Außenseite der Blende von einem Blech gebildet sein, welches nach seinem Formen eine glatte Außenseite aufweist, zur Formstabilität der becherförmigen Blende nicht beitragen muß und bei dem bleibende Anlauffarben auf der glatten Außenseite der Blende erst bei Temperaturen auftreten, welche höher sind als bei verchromtem Stahlblech. Als Blech für die Blende eignet sich besonders ein Leichtmetallblech mit einer silberfarbigen glänzenden Oberfläche, welche als Außenseite für die Blende dient. Das Leichtmetallblech besteht vorteilhafterweise aus Aluminium oder einer Aluminiumlegierung, wobei die silberfarbige glänzende Oberfläche durch eine Folie geschützt ist. Die glänzende Oberfläche bildet die Außenseite der becherförmigen Blende. Nach dem Formen des äußeren Wandteils und des Bodens der Blende wird erst die Folie entfernt. Dadurch kann die Außenseite der Blende beim Formen nicht beschädigt werden.The object of the invention is to improve the headlamp described in the preamble of
Eine sehr tiefe Ausführung der becherförmigen Blende ist möglich, wenn der äußere und innere umlaufende Wandteil der Seitenwand jeweils eine Naht aufweist, welche von dem dem Reflektor zugewandten äußeren Rand bis zu dem der Lichtscheibe zugewandten äußeren Rand verläuft. Hierbei muß der äußere Wandteil nicht tiefgezogen, sondern kann gerollt werden. Beim Tiefziehen entsteht an der Außenseite des äußeren Wandteils eine unerwünscht matte Oberfläche. Durch das Rollen bleibt die glatte Oberfläche des äußeren Wandteils selbst dann erhalten, wenn die umlaufende Seitenwand der becherförmigen Blende nahezu zylindrisch ist. Die Blende baut bei einer zylindrischen Form sehr klein. Dadurch kann die optisch wirksame Reflexionsfläche des Reflektors im Bereich seines Scheitels so groß wie möglich ausfallen. Die Formstabilität der Blende ist besonders groß, wenn der innere und äußere Wandteil kegelstumpfförmig ausgeführt ist. Die Blende weist von außen ein homogenes Erscheinungsbild auf, wenn der innere und äußere Wandteil einen gemeinsamen Rand aufweist. Hierbei dient ausschließlich der innere Wandteil der Seitenwand zur Abschattung von direkt aus der Lichtquelle austretenden Lichtstrahlen. In diesem Zusammenhang ist es vorteilhaft, wenn der innere Wandteil aus Stahlblech besteht und eine matte Innenfläche aufweist. Die matte Innenfläche kann durch eine schwarze Lackierung gebildet sein. Dadurch ist eine hohe Lichtabsorption gegeben, und somit können keine störenden Lichtstrahlen durch Reflexion innerhalb der Blende entstehen. Für die Blende ist eine hohe Formstabilität gegeben, da sie aus Stahlblech hergestellt ist. Bei der Verwendung einer Lampe, deren Glaskolben am freien Ende eine geschwärzte Kappe aufweist, muß der Boden der Blende nicht doppelwandig ausgeführt sein, da die Kappe direkt aus der Lichtquelle austretende Lichtstrahlen gegenüber dem Boden abschirmt.A very deep design of the cup-shaped aperture is possible if the outer and inner circumferential wall portion of the side wall in each case a seam which extends from the outer rim facing the reflector to the outer rim facing the lens. In this case, the outer wall part must not be deep-drawn, but can be rolled. During deep drawing, an undesirable matt surface is formed on the outside of the outer wall part. By rolling the smooth surface of the outer wall portion is maintained even if the circumferential side wall of the cup-shaped aperture is almost cylindrical. The aperture is very small in a cylindrical shape. As a result, the optically effective reflection surface of the reflector in the region of its apex can be as large as possible. The dimensional stability of the diaphragm is particularly great when the inner and outer wall part is frustoconical. The panel has a homogeneous appearance from the outside, when the inner and outer wall part has a common edge. In this case, only the inner wall part of the side wall is used for shading of light rays emerging directly from the light source. In this context, it is advantageous if the inner wall part consists of sheet steel and has a matte inner surface. The matt inner surface can be formed by a black finish. As a result, a high light absorption is given, and thus no disturbing light rays caused by reflection within the diaphragm. For the panel is given a high dimensional stability, since it is made of sheet steel. When using a lamp whose glass bulb has a blackened cap at the free end, the bottom of the panel must not be double-walled, since the cap directly shields light rays emerging from the light source from the ground.
Weiterhin ist es vorteilhaft, wenn das Tragelement der Blende doppelwandig ausgeführt ist und jeder Teil des Tragelementes an einen der die Naht begrenzenden Ränder des inneren Wandteils einstückig angebunden ist, wobei das Tragelement durch einen Schlitz des äußeren Wandteils hindurchführt und der Schlitz seitlich nur zum Reflektor hin geöffnet ist. Der äußere Wandteil ist mit Abschnitten seiner äußeren Ränder durch kleine Eindrückungen mit dem inneren Wandteil fest verbunden.Furthermore, it is advantageous if the support element of the panel is double-walled and each part of the support element is integrally connected to one of the seam delimiting edges of the inner wall part, wherein the support member passes through a slot of the outer wall portion and the slot laterally only to the reflector is open. The outer wall part is firmly connected to portions of its outer edges by small indentations with the inner wall part.
Weiterhin ist es vorteilhaft, wenn der äußere Wandteil der doppelwandigen Seitenwand, in einem Abschnitt, in welchem die Ränder einer Naht des äußeren Wandteils aneinanderstoßen, unlösbar miteinander verbunden ist.Furthermore, it is advantageous if the outer wall part of the double-walled side wall, in a portion in which the edges of a seam of the outer wall part abut each other, is non-detachably connected to each other.
Ein Ausführungsbeispiel nach der Erfindung ist in der Zeichnung dargestellt, und zwar zeigen
Figur 1 in einer Teilansicht einen vertikalen Mittelschnitt eines Scheinwerfers für Fahrzeuge mit einer einer Lichtquelle zugeordneten becherförmigen Blende;Figur 2 in einer Seitenansicht drei Bauteile der becherförmigen Blende vor dem Zusammenbau;Figur 3 eine Ansicht aus Richtung x inFigur 1 auf die becherförmige Blende;Figur 4 eine Ansicht aus Richtung y auf die becherförmige Blende;Figur 5 eine Abwicklung einer inneren Seitenwand der becherförmigen Blende mit einem an das innere Wandteil angeformten Tragelement der Blende;Figur 6 eine Abwicklung des äußeren Wandteils der becherförmigen Blende und- Figur 7 eine Abwicklung des äußeren Wandteils und des Bodens einer anderen becherförmigen Blende, wobei der Boden über eine Biegelasche mit dem äußeren Wandteil verbunden ist.
- Figure 1 is a partial sectional view of a vertical center section of a headlamp for vehicles with a cup-shaped aperture associated with a light source;
- Figure 2 in a side view three components of the cup-shaped aperture before assembly;
- Figure 3 is a view from direction x in Figure 1 on the cup-shaped aperture;
- Figure 4 is a view from direction y on the cup-shaped aperture;
- Figure 5 shows a development of an inner side wall of the cup-shaped aperture with an integrally formed on the inner wall part supporting element of the aperture;
- Figure 6 shows a development of the outer wall portion of the cup-shaped aperture and
- Figure 7 shows a development of the outer wall portion and the bottom of another cup-shaped aperture, wherein the bottom is connected via a bending tab with the outer wall portion.
Der Scheinwerfer weist ein aus Kunststoff bestehendes Außengehäuse auf, welches durch eine weitestgehend optikfreie Lichtscheibe abgeschlossen ist (nicht dargestellt). Im Inneren des Außengehäuses ist mindestens ein aus Kunststoff bestehender, schalenförmiger Reflektor (1) angeordnet. In dem Reflektor (1) ist im Bereich seines Scheitels eine Öffnung (17) zur Aufnahme einer Lichtquelle (3) eingebracht. Als Lichtquelle (3) dient eine Glühlampe, welche mit ihrem Glaskolben (18) voraus durch die Öffnung (17) des Reflektors (1) eingeführt ist, bis die Glühlampe mit ihrem tellerförmigen Sockel (19) an dem äußeren Randbereich der Öffnung (17) anliegt. Der Sockel (19) ist durch eine nicht dargestellte Halteeinrichtung an der Rückseite des Reflektors (1) gehaltert. Die Glühlampe weist eine Glühwendel auf, welche in einem Brennbereich des schalenförmigen Reflektors (1) angeordnet ist. Der Glaskolben der Glühlampe weist an seinem vorderen freien Endabschnitt eine geschwärzte Kappe (20) auf, um direkt aus der Lichtquelle (3) austretende Lichtstrahlen nach vom hin abzuschirmen. Damit vordere Randabschnitte des Reflektors (1) gegenüber Lichtstrahlen, welche direkt aus der Lichtquelle (3) austreten, abgeschirmt sind, taucht der Glaskolben (18) mit seinem freien Ende in eine becherförmige Blende (2) ein, welche über ein Tragelement (6) mit dem Reflektors (1) verbunden ist.The headlight has an outer housing made of plastic, which is closed by a largely optic-free lens (not shown). In the interior of the outer housing, at least one consisting of plastic, shell-shaped reflector (1) is arranged. In the reflector (1) an opening (17) for receiving a light source (3) is introduced in the region of its apex. As the light source (3) is an incandescent lamp which is inserted with its glass bulb (18) ahead through the opening (17) of the reflector (1) until the incandescent lamp with its plate-shaped base (19) at the outer edge region of the opening (17) is applied. The base (19) is through a holding device, not shown, held on the back of the reflector (1). The incandescent lamp has an incandescent filament, which is arranged in a focal region of the dish-shaped reflector (1). The glass bulb of the incandescent lamp has at its front free end portion a blackened cap (20) to shield directly from the light source (3) emerging light rays from the back. So that front edge portions of the reflector (1) are shielded from light rays which emerge directly from the light source (3), the glass bulb (18) with its free end dips into a cup-shaped diaphragm (2), which is supported by a support element (6). connected to the reflector (1).
Die becherförmige Blende (2) weist umlaufend eine doppelwandige Seitenwand (5) und einen Boden (4) auf, welcher von einem Deckel gebildet ist. Der innere Wandteil (10) der doppelwandigen Seitenwand (5) besteht aus einem Stahlblech, dessen Innenseite schwarz lackiert ist. Die schwarze Lackierung dient zur Absorption der auf die Innenseite des inneren Wandteils (10) auftretenden Lichtstrahlen der Lichtquelle (3). In Figur 5 ist der innere Wandteil (10) abgewickelt dargestellt und weist an seinen sich abgewandten Rändern (14) jeweils einen Tragarm auf, welcher gedoppelt das Tragelement (6) ist. Nach einem Rollen des inneren Wandteils (10) begrenzen die Ränder (14) eine Naht (16), die auch zwischen den beiden Tragarmen des gedoppelten Tragelements (6) verläuft. An einem der beiden Tragarme des Tragelementes (6) sind seitlich Haltefahnen (21) angeformt, welche nach der Doppelung der Tragarme um den benachbarten Tragarm herum gebogen sind und somit beide Tragarme des Tragelementes (6) zusammenhalten. In Figur 6 ist der äußere Wandteil (9) der doppelwandigen Seitenwand (5) der becherförmigen Blende (2) dargestellt.The cup-shaped panel (2) has circumferentially a double-walled side wall (5) and a bottom (4), which is formed by a lid. The inner wall part (10) of the double-walled side wall (5) consists of a steel sheet whose inside is painted black. The black coating serves to absorb the light rays of the light source (3) which occur on the inside of the inner wall part (10). In Figure 5, the inner wall portion (10) is shown unwound and has at its opposite edges (14) each have a support arm, which is doubled the support element (6). After rolling the inner wall part (10), the edges (14) delimit a seam (16) which also extends between the two support arms of the doubled support element (6). On one of the two support arms of the support element (6) retaining lugs (21) are laterally formed, which are bent after the duplication of the support arms to the adjacent support arm around and thus hold together both support arms of the support element (6). In Figure 6, the outer wall portion (9) of the double-walled side wall (5) of the cup-shaped aperture (2) is shown.
Der äußere Wandteil (9) und der als Deckel dienende Boden (4) der Blende (2) nach den Figuren 2 und 6 bzw. 7 sind aus einem Leichtmetallblech geformt, dessen die Außenseite der becherförmigen Blende (2) bildende Oberfläche hochglänzend und silberfarbig ausgeführt ist. Die hochglänzende Oberfläche ist durch eine abziehbare Folie geschützt. Die Folie wird erst nach dem Formen des äußeren Wandteils (9) und des Bodens (4) abgezogen. Der äußere Wandteil (9) wird ebenso wie der innere Wandteil (10) gerollt und liegt flächig an dem inneren Wandteil (10) an. Der äußere Wandteil (9) weist an dem dem Reflektor (1) zugewandten Rand (7) Haltefahnen (21) auf, welche um den äußeren Rand (7) des inneren Wandteils (10) nach Figur 5 gebogen sind und den äußeren Wandteil (9) am inneren Wandteil (10) halten. Der äußere Wandteil (9) ist an seinem vorderen Rand (12) durch Eindrückungen (nicht dargestellt), welche in die Oberfläche des inneren Wandteils (10) eingreifen, an dem inneren Wandteil (10) gehalten. Am vorderen Rand (12) weist der innere und äußere Wandteil (10 und 9) umlaufend eine Stufe auf, in welcher ein seitlicher Randabschnitt (8) des Bodens (4) angeordnet ist. Der seitliche Randabschnitt (8) verläuft mit seiner Außenseite bündig zur Außenseite des angrenzenden äußeren Wandteils (9). Der als Boden (4) dienende Deckel ist ebenfalls durch nicht dargestellte Eindrückungen an dem äußeren Wandteil (9) unverlierbar gehalten. Der innere und äußere Wandteil (10 und 9) weisen umlaufend einen gemeinsamen Rand (7) auf. Hierbei dient ausschließlich der Rand (7) des inneren Wandteils (10) zur Abschattung von direkt aus der Lichtquelle (3) austretenden Lichtstrahlen. Der Boden (4) der becherförmigen Blende (2) muß nicht wie seine Seitenwand (5) doppelwandig ausgeführt sein, da wegen der geschwärzten Kappe (20) des Glaskolbens (18) der Lichtquelle (3) der Boden gegenüber direkt aus der Lichtquelle (3) austretenden Lichtstrahlen abgeschirmt ist.The outer wall part (9) and the serving as a lid bottom (4) of the diaphragm (2) according to Figures 2 and 6 and 7 are formed from a light metal sheet, the outside of the cup-shaped aperture (2) forming surface high gloss and silver is. The high-gloss surface is protected by a peel-off film. The film is pulled off only after the molding of the outer wall part (9) and the bottom (4). The outer wall part (9) is rolled as well as the inner wall part (10) and lies flat against the inner Wall part (10). The outer wall part (9) has retaining lugs (21) on the edge (7) facing the reflector (1), which are bent around the outer edge (7) of the inner wall part (10) according to FIG. 5 and the outer wall part (9 ) on the inner wall part (10). The outer wall part (9) is held at its front edge (12) by indentations (not shown) which engage in the surface of the inner wall part (10) on the inner wall part (10). At the front edge (12), the inner and outer wall part (10 and 9) circumferentially on a step in which a lateral edge portion (8) of the bottom (4) is arranged. The lateral edge portion (8) extends with its outer side flush with the outside of the adjacent outer wall part (9). The bottom (4) serving lid is also held captive by not shown indentations on the outer wall part (9). The inner and outer wall part (10 and 9) have circumferentially on a common edge (7). In this case, only the edge (7) of the inner wall part (10) is used for shadowing of light rays emerging directly from the light source (3). The bottom (4) of the cup-shaped aperture (2) does not have to be double-walled, like its side wall (5), because of the blackened cap (20) of the glass bulb (18) of the light source (3) the bottom opposite directly from the light source (3 ) emerging light rays is shielded.
Bei der in Figur 7 dargestellten Abwicklung handelt es sich um das äußere Wandteil (9) und den Boden (4) der becherförmigen Blende (3). Hierbei ist der Boden (4) über eine Biegelasche (13) einstückig mit dem äußeren Wandteil (9) verbunden.The unwinding shown in FIG. 7 is the outer wall part (9) and the bottom (4) of the cup-shaped panel (3). Here, the bottom (4) via a bending tab (13) is integrally connected to the outer wall part (9).
- 11
- Reflektorreflector
- 22
- Blende .Cover .
- 33
- Lichtquellelight source
- 44
- Bodenground
- 55
- SeitenwandSide wall
- 66
- Tragelementsupporting member
- 77
- äußerer Randouter edge
- 88th
- freier Randabschnittfree edge section
- 99
- äußerer Wandteilouter wall part
- 1010
- innerer Wandteilinner wall part
- 1111
- Nahtseam
- 1212
- vorderer Randfront edge
- 1313
- Biegelaschebending lug
- 1414
- Rändermargins
- 1515
- Schlitzslot
- 1616
- Nahtseam
- 1717
- Öffnungopening
- 1818
- Glaskolbenflask
- 1919
- Sockelbase
- 2020
- Kappecap
- 2121
- Haltefahneholding flag
- 2222
- Eindrückungdepression
Claims (10)
- Headlamp for vehicles, having a beaker-shaped shade (2) arranged between a reflector (1) and a lamp screen, said shade serving both to shade off light rays emerging directly from a light source (3), as well as to cover the light source (3) and the base (4) of said shade being a cover connected to its peripheral side wall (5), and having at least one support element (6), which connects the beaker-shaped shade (2) to the reflector (1), wherein the beaker-shaped shade (2) has a peripheral double-layered side wall (5) extending as far as its outer free edge, characterised in that the outer wall portion (9) of the double side wall (5) lies and is held against the inner wall portion (10) which is connected by means of the support element (6) to the reflector (1), and the cover of the shade (2) serving as the base (4) adjoins the double-layered side wall (5) with its free edge section (8) on the outer wall portion (9), wherein the cover formed by the base (4) and the outer wall portion (9) of the side wall (5) comprise the same metal sheet.
- Headlamp for vehicles according to claim 1, characterised in that at least the outer peripheral wall portion (9) of the side wall (5) has a seam (11), which runs from the outer edge (7) facing towards the reflector (1) to the outer edge (12) facing towards the lamp screen.
- Headlamp for vehicles according to claim 1 or 2, characterised in that the inner and outer wall portion (10 and 9) are made in the form of a truncated cone.
- Headlamp for vehicles according to one of the claims 1 to 3, characterised in that the beaker-shaped shade (2) has a common peripheral free edge (7) formed from the inner and outer wall portions (10 and 9).
- Headlamp for vehicles according to one of the claims 1 to 4, characterised in that the cover formed by the base (4) is constructed, via a flexible flap (13), in one piece with the outer wall portion (9).
- Headlamp for vehicles according to one of the claims 1 to 5, characterised in that the cover formed by the base (4) engages with a peripheral lateral edge section (8) facing towards the reflector in a peripheral step of an adjacent free edge (12) of the double-layered side wall (5) and passes flush, with the outer side of its lateral edge section (8), into the outer side of the double-layered side wall (5).
- Headlamp for vehicles according to one of the claims 1 to 6, characterised in that the outer wall portion (9) of the double-layered side wall (5)1 and the cover serving as the base (4) comprise a light sheet metal with a glossy silver-coloured surface, which is the outer side of the shade (2).
1 Translator's note: There appears to be an error in the German original in the third line of claim 7. The reference number 8 has been used with the word Seitenwand (= 'side wall'), which is otherwise associated with the reference number 5. This has been amended accordingly in the translation. - Headlamp for vehicles according to one of the claims 1 to 7, characterised in that the inner wall portion (10) of the double-layered side wall (5) comprises sheet steel with a matt inner surface.
- Headlamp for vehicles according to one of the claims 2 to 8, characterised in that the support element (6) is made from a doubled support arm which passes through a slit (15) bordered by the edges (14) of a seam (11) of the outer wall portion (9), said slit being laterally open only towards the reflector (1), whereby a seam (16) of the inner wall portion (10) passes through the two portions of the doubled support element (6) and said two portions are bound to the edges of the inner wall portion (10) forming the seam (16), in one piece with said edges.
- Headlamp for vehicles according to one of the claims 2 to 9, characterised in that the outer wall portion (9) of the double-layered side wall (5) is non-detachably connected to itself in a section wherein the edges (14) of a seam (11) of the outer wall portion (9)2 meet each other.
2 In the last line of claim 10 in the German original, the reference number 10 has been used in conjunction with the words äußeres Wandteil (= 'outer wall portion'), whereas this term is otherwise associated with the reference number 9. This has been amended accordingly in the translation.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19846542 | 1998-10-09 | ||
DE1998146542 DE19846542C2 (en) | 1998-10-09 | 1998-10-09 | Vehicle headlights with a homogeneous front view |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0992738A2 EP0992738A2 (en) | 2000-04-12 |
EP0992738A3 EP0992738A3 (en) | 2002-01-30 |
EP0992738B1 true EP0992738B1 (en) | 2006-05-24 |
Family
ID=7883926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990119737 Expired - Lifetime EP0992738B1 (en) | 1998-10-09 | 1999-10-05 | Vehicle headlamp with double-walled shade |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0992738B1 (en) |
DE (2) | DE19846542C2 (en) |
ES (1) | ES2264233T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ303843B6 (en) * | 2012-03-16 | 2013-05-22 | Hella Autotechnik, S.R.O. | Light source diaphragm, especially for motor vehicle headlight |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11213707A (en) * | 1998-01-28 | 1999-08-06 | Koito Mfg Co Ltd | Vehicle lamp |
DE20021657U1 (en) * | 2000-12-20 | 2002-05-02 | Alanod Aluminium Veredlung Gmb | Cover part for a light source |
DE20120417U1 (en) | 2001-12-18 | 2002-03-21 | Automotive Lighting Reutlingen GmbH, 72762 Reutlingen | Radiation shield for automotive headlights |
DE10258535B4 (en) * | 2002-12-14 | 2008-04-03 | Volkswagen Ag | Vehicle headlight with a beam stop |
DE102004039524B4 (en) | 2004-08-14 | 2018-05-09 | Volkswagen Ag | Headlamp with a beam stop for a vehicle |
FR2877712B1 (en) * | 2004-11-09 | 2007-04-13 | Valeo Vision Sa | PROJECTOR DEVICE WITH OCCULTATION ELEMENT WITH INTEGRATED FASTENING SYSTEM AND METHOD FOR FIXING AN OCCULTATION MEMBER IN A PROJECTOR DEVICE |
DE102005031812A1 (en) * | 2005-07-06 | 2007-01-18 | Hella Kgaa Hueck & Co. | Vehicle head light for use during night travels, has blind device with separate ray screen which screens light rays discharged directly from light source and directed on outer running edge area of infrared light filter |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2098680A5 (en) * | 1970-07-23 | 1972-03-10 | Sev Marchal | |
US5067054A (en) * | 1989-10-11 | 1991-11-19 | Koito Manufacturing Co., Ltd. | Beam-forming shade for vehicular headlamp |
JP2878111B2 (en) * | 1994-03-09 | 1999-04-05 | 株式会社小糸製作所 | Vehicle lighting |
JP3013141B2 (en) * | 1994-04-15 | 2000-02-28 | 株式会社小糸製作所 | Vehicle headlights |
JP3791626B2 (en) * | 1995-12-22 | 2006-06-28 | 株式会社小糸製作所 | Vehicle headlamp |
FR2757808B1 (en) * | 1996-12-26 | 1999-03-19 | Valeo Vision | MOTOR VEHICLE PROJECTOR WITH STYLE COVER |
US5993035A (en) * | 1998-03-09 | 1999-11-30 | Trans Technology Engineered Components, Llc | Combined light shield and heat shield for headlight |
-
1998
- 1998-10-09 DE DE1998146542 patent/DE19846542C2/en not_active Expired - Fee Related
-
1999
- 1999-10-05 ES ES99119737T patent/ES2264233T3/en not_active Expired - Lifetime
- 1999-10-05 EP EP19990119737 patent/EP0992738B1/en not_active Expired - Lifetime
- 1999-10-05 DE DE59913455T patent/DE59913455D1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ303843B6 (en) * | 2012-03-16 | 2013-05-22 | Hella Autotechnik, S.R.O. | Light source diaphragm, especially for motor vehicle headlight |
Also Published As
Publication number | Publication date |
---|---|
ES2264233T3 (en) | 2006-12-16 |
DE19846542A1 (en) | 2000-04-20 |
DE59913455D1 (en) | 2006-06-29 |
EP0992738A2 (en) | 2000-04-12 |
DE19846542C2 (en) | 2003-04-17 |
EP0992738A3 (en) | 2002-01-30 |
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