EP0581048A1 - Vehicular headlights - Google Patents
Vehicular headlights Download PDFInfo
- Publication number
- EP0581048A1 EP0581048A1 EP93110566A EP93110566A EP0581048A1 EP 0581048 A1 EP0581048 A1 EP 0581048A1 EP 93110566 A EP93110566 A EP 93110566A EP 93110566 A EP93110566 A EP 93110566A EP 0581048 A1 EP0581048 A1 EP 0581048A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lens
- motor vehicle
- reflector
- headlight
- projection
- 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.)
- Granted
Links
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
- F21S41/55—Attachment thereof
-
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/29—Attachment thereof
- F21S41/295—Attachment thereof specially adapted to projection lenses
Definitions
- the invention relates to a motor vehicle headlight according to the preamble of patent claim 1.
- a motor vehicle headlight working on the projection principle is known for example from DE-PS 36 40 773.
- the projection lens sits in front of the cover plate.
- motor vehicle headlights according to the preamble of claim 1 are on the market, in which a lens with a flat or curved surface sits between the cover plate and the projection lens. The purpose of this lens is to achieve an optical impression of the headlight that is the same as that of conventional headlights.
- These headlights do not work according to the projection principle, but only have a reflector, a lens and a cover plate. Compared to headlights that work according to the projection principle, these headlights have a reflector with a significantly larger diameter.
- the invention has for its object to provide a motor vehicle headlight of the type mentioned, which works according to the projection principle, in addition to a cover plate has a lens and which is characterized by a small depth.
- the penetration of the lens through the projection lens means that no additional space is required compared to such a headlight without a projection lens.
- the light emerging from the projection lens passes through the lens without loss of light. This only acts on the light emitted laterally by the projection lens and collects it to form a light ring which, in conjunction with the projection lens, gives a flat overall impression of the light source.
- the seemingly effective light area of the headlamp corresponds to that of conventional headlamps.
- the lens Since the lens only absorbs an insignificant part of the light emitted by the projection lens, it is not exposed to any significant thermal stress. It is therefore possible to manufacture the lens from transparent plastic and thus save weight.
- the spreading disc also increases the weight of the headlamp, measured on a headlamp working according to the project principle without a lens, only insignificantly.
- the lens Due to the relatively low weight of the lens, it can be attached to the edge of the reflector. It then changes the optical properties of the reflector only insignificantly even under mechanical load. Overall, this results in a design that is characterized by advantages in terms of production technology.
- the lens is attached to the reflector and can be used as a structural unit in the headlight housing.
- the motor vehicle headlight 1 shown in the figure essentially consists of the following parts: An incandescent lamp 2, a reflector 3, additional reflectors 4 and 5 and a projection lens 6.
- the headlight 1 sits in a housing 7 and forms, together with other lights, not shown, a structural unit which is covered by a cover plate 8 to the outside.
- the headlamp also has a diffuser 9, known per se, which is provided with a central opening 10.
- the projection lens 6 passes through this.
- the position of the lens 9 with respect to the projection lens 6 is such that the light emerging from the headlight 1 passes through the opening 10 essentially freely and after the cover plate 8 occurs in the exterior of the motor vehicle. Only a small proportion of this light emerges laterally from the projection lens 6 and reaches the lens 9.
- the effective light exit surface of the headlight 1 acts as a surface through the edge 9 'of the Diffuser 9 is limited. Compared to the light exit surface, which is given by the outer dimensions of the projection lens 6, this light exit surface appears many times larger.
- the space required by the lens 9 is approximately equal to the space due to the penetration, which is required without such a lens. Due to the small dimensions and the arrangement, the lens 9 can be made of plastic and be attached to the edge of the reflector 3 via a funnel-shaped additional reflector 3 '(not shown in detail). This results in a headlight that is characterized by an unchanged installation space in addition to a good visual appearance.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Kraftfahrzeug-Scheinwerfer gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a motor vehicle headlight according to the preamble of patent claim 1.
Ein nach dem Projektionsprinzip arbeitender Kraftfahrzeug-Scheinwerfer ist beispielsweise aus der DE-PS 36 40 773 bekannt. Bei diesem Kraftfahrzeug-Scheinwerfer sitzt die Projektionslinse vor der Abdeckscheibe. Ferner sind Kraftfahrzeug-Scheinwerfer gemäß dem Oberbegriff des Patentanspruchs 1 in Verkehr, bei denen zwischen der Abdeckscheibe und der Projektionslinse eine Streuscheibe mit planer bzw. gekrümmter Oberfläche sitzt. Aufgabe dieser Streuscheibe ist es, einen optischen Eindruck des Scheinwerfers zu erzielen, der gleich dem von konventionellen Scheinwerfern ist. Diese Scheinwerfer arbeiten nicht nach dem Projektionsprinzip, sondern besitzen lediglich einen Reflektor, eine Streuscheibe und eine Abdeckscheibe. Gegenüber Scheinwerfern, die nach dem Projektionsprinzip arbeiten, besitzen diese Scheinwerfer einen Reflektor mit deutlich größerem Durchmesser.A motor vehicle headlight working on the projection principle is known for example from DE-PS 36 40 773. In this motor vehicle headlight, the projection lens sits in front of the cover plate. Furthermore, motor vehicle headlights according to the preamble of claim 1 are on the market, in which a lens with a flat or curved surface sits between the cover plate and the projection lens. The purpose of this lens is to achieve an optical impression of the headlight that is the same as that of conventional headlights. These headlights do not work according to the projection principle, but only have a reflector, a lens and a cover plate. Compared to headlights that work according to the projection principle, these headlights have a reflector with a significantly larger diameter.
Sieht man, wie beschrieben, bei einem Scheinwerfer mit Projektionsprinzip zwischen der Abdeckscheibe und der Projektionslinse eine Streuscheibe vor, so führt dies zu einer relativ großen Bautiefe des Scheinwerfers. Diese Bautiefe entspricht der des konventionellen Scheinwerfers. Damit aber geht der Gewinn an Bauraum, der sich für derartige Scheinwerfer aufgrund des deutlich geringeren Reflektor-Durchmessers ergibt, weitgehend verloren.One sees, as described, with a headlight with a projection principle between the cover plate and the Projection lens in front of a lens, this leads to a relatively large depth of the headlight. This depth corresponds to that of the conventional headlamp. However, the gain in installation space that results for headlights of this type due to the significantly smaller reflector diameter is largely lost.
Der Erfindung liegt die Aufgabe zugrunde, einen Kraftfahrzeug-Scheinwerfer der eingangs genannten Art zu schaffen, der nach dem Projektionsprinzip arbeitet, zusätzlich zu einer Abdeckscheibe eine Streuscheibe besitzt und der sich durch eine geringe Bautiefe auszeichnet.The invention has for its object to provide a motor vehicle headlight of the type mentioned, which works according to the projection principle, in addition to a cover plate has a lens and which is characterized by a small depth.
Die Erfindung löst diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1.The invention solves this problem by the characterizing features of patent claim 1.
Die Durchdringung der Streuscheibe durch die Projektionslinse führt dazu, daß gegenüber einem derartigen Scheinwerfer ohne Projektionslinse kein zusätzlicher Bauraum erforderlich ist. Darüberhinaus tritt das aus der Projektionslinse austretende Licht ohne Lichtverluste durch die Streuscheibe hindurch. Diese wirkt lediglich auf das seitlich von der Projektionslinse ausgestrahlte Licht und sammelt dieses zu einem Lichtkranz, der in Verbindung mit der Projektionslinse einen flächigen Gesamteindruck der Lichtquelle ergibt. Die scheinbar wirksame Lichtfläche des Scheinwerfers entspricht der bei konventionellen Scheinwerfern.The penetration of the lens through the projection lens means that no additional space is required compared to such a headlight without a projection lens. In addition, the light emerging from the projection lens passes through the lens without loss of light. This only acts on the light emitted laterally by the projection lens and collects it to form a light ring which, in conjunction with the projection lens, gives a flat overall impression of the light source. The seemingly effective light area of the headlamp corresponds to that of conventional headlamps.
Da die Streuscheibe nur einen unwesentlichen Teil des von der Projektionslinse ausgesandten Lichts aufnimmt, ist sie einer wesentlichen thermischen Belastung nicht ausgesetzt. Es ist damit möglich, die Streuscheibe aus transparentem Kunststoff zu fertigen und damit Gewicht zu sparen. Damit erhöht die Streuscheibe auch das Gewicht des Scheinwerfers, gemessen an einem nach dem Projektsprinzip arbeitenden Scheinwerfer ohne Streuscheibe, nur unwesentlich.Since the lens only absorbs an insignificant part of the light emitted by the projection lens, it is not exposed to any significant thermal stress. It is therefore possible to manufacture the lens from transparent plastic and thus save weight. The spreading disc also increases the weight of the headlamp, measured on a headlamp working according to the project principle without a lens, only insignificantly.
Aufgrund des relativ geringen Gewichts der Streuscheibe kann diese am Rande des Reflektors befestigt sein. Sie verändert dann auch bei mechanischer Belastung die optischen Eigenschaften des Reflektors nur unwesentlich. Insgesamt ergibt sich damit eine Bauform, die sich durch fertigungstechnische Vorteile auszeichnet. Die Streuscheibe ist zusammen mit dem Reflektor befestigt und kann mit diesem als Baueinheit in das Scheinwerfer-Gehäuse eingesetzt werden.Due to the relatively low weight of the lens, it can be attached to the edge of the reflector. It then changes the optical properties of the reflector only insignificantly even under mechanical load. Overall, this results in a design that is characterized by advantages in terms of production technology. The lens is attached to the reflector and can be used as a structural unit in the headlight housing.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.In the drawing, an embodiment of the invention is shown.
Es zeigt die einzige Figur eines Kraftfahrzeug-Scheinwerfers gemäß der Erfindung mit platzsparender Anordnung einer Streuscheibe.It shows the only figure of a motor vehicle headlight according to the invention with a space-saving arrangement of a lens.
Der in der Figur gezeigte Kraftfahrzeug-Scheinwerfer 1 besteht im wesentlichen aus folgenden Teilen:
Einer Glühlampe 2, einem Reflektor 3, Zusatzreflektoren 4 und 5 sowie einer Projektionslinse 6. Der Scheinwerfer 1 sitzt in einem Gehäuse 7 und bildet zusammen mit weiteren nicht dargestellten Leuchten eine Baueinheit, die durch eine Abdeckscheibe 8 nach außen abgedeckt ist.The motor vehicle headlight 1 shown in the figure essentially consists of the following parts:
An incandescent lamp 2, a reflector 3, additional reflectors 4 and 5 and a
Neben diesen bekannten Elementen besitzt der Scheinwerfern auch eine an sich bekannte Streuscheibe 9, die mit einer zentralen Öffnung 10 versehen ist. Durch diese hindurch tritt die Projektionslinse 6. Die Stellung der Streuscheibe 9 bezogen auf die Projektionslinse 6 ist derart, daß das aus dem Scheinwerfer 1 austretende Licht im wesentlichen frei durch die Öffnung 10 gelangt und nach der Abdeckscheibe 8 in den Außenraum des Kraftfahrzeugs tritt. Lediglich ein kleiner Anteil dieses Lichts tritt seitlich aus der Projektionslinse 6 aus und gelangt in die Streuscheibe 9. Von vorne, d. h. betrachtet aus dem mit dem Scheinwerferlicht beleuchteten Raum, wirkt die wirksame Lichtaustrittsfläche des Scheinwerfers 1 als Fläche, die durch den Rand 9' der Streuscheibe 9 begrenzt ist. Gegenüber der Lichtaustrittsfläche, die durch die Außenabmessungen der Projektionslinse 6 gegeben ist, wirkt diese Lichtaustrittsfläche um ein Vielfaches vergrößert.In addition to these known elements, the headlamp also has a diffuser 9, known per se, which is provided with a central opening 10. The
Der durch die Streuscheibe 9 beanspruchte Bauraum ist aufgrund der Durchdringung etwa gleich dem Bauraum, der ohne eine derartige Streuscheibe erforderlich ist. Bedingt durch die kleinen Abmessungen und die Anordnung kann die Streuscheibe 9 aus Kunststoff bestehen und über einen trichterförmigen Zusatzreflektor 3' am Rand des Reflektors 3 befestigt sein (nicht im einzelnen dargestellt). Damit ergibt sich ein Scheinwerfer, der sich neben einem guten optischen Erscheinungsbild durch einen unveränderten Bauraum auszeichnet.The space required by the lens 9 is approximately equal to the space due to the penetration, which is required without such a lens. Due to the small dimensions and the arrangement, the lens 9 can be made of plastic and be attached to the edge of the reflector 3 via a funnel-shaped additional reflector 3 '(not shown in detail). This results in a headlight that is characterized by an unchanged installation space in addition to a good visual appearance.
Claims (3)
dadurch gekennzeichnet, daß die Streuscheibe eine zentrale Öffnung besitzt, die von der Projektionslinse zumindest teilweise durchdrungen ist.Motor vehicle headlights with a light source, a reflector, a projection lens, a lens and a cover plate,
characterized in that the lens has a central opening which is at least partially penetrated by the projection lens.
dadurch gekennzeichnet, daß die Streuscheibe aus transparentem Kunststoff gefertigt ist.Motor vehicle headlight according to claim 1,
characterized in that the lens is made of transparent plastic.
dadurch gekennzeichnet, daß die Streuscheibe am Rand des Reflektors befestigt ist.Motor vehicle headlight according to claim 1 or 2,
characterized in that the lens is attached to the edge of the reflector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4224865A DE4224865A1 (en) | 1992-07-28 | 1992-07-28 | Motor vehicle headlights |
| DE4224865 | 1992-07-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0581048A1 true EP0581048A1 (en) | 1994-02-02 |
| EP0581048B1 EP0581048B1 (en) | 1997-08-27 |
Family
ID=6464269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93110566A Expired - Lifetime EP0581048B1 (en) | 1992-07-28 | 1993-07-02 | Vehicular headlights |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0581048B1 (en) |
| DE (2) | DE4224865A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2770618A1 (en) * | 1997-11-04 | 1999-05-07 | Valeo Vision | ELLIPTICAL SPOTLIGHT WITH ENLARGED LIGHTING RANGE |
| US6050705A (en) * | 1997-02-06 | 2000-04-18 | Robert Bosch Gmbh | Vehicle headlight having predetermined light projecting characteristics |
| DE19906527A1 (en) * | 1999-02-17 | 2000-08-31 | Volkswagen Ag | Vehicle headlights |
| EP1710494A1 (en) * | 2005-04-07 | 2006-10-11 | Hella KGaA Hueck & Co. | Headlight for vehicles |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10007403A1 (en) * | 2000-02-18 | 2001-08-23 | Volkswagen Ag | Projection headlights for a motor vehicle |
| DE20211647U1 (en) | 2002-07-23 | 2002-09-26 | Pintsch Bamag Antriebs- und Verkehrstechnik GmbH, 46537 Dinslaken | Signal light and light arrangement for rail vehicles |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB214002A (en) * | 1923-01-18 | 1924-04-17 | William Thomas Coulson | An improved motor head light |
| EP0094519A2 (en) * | 1982-05-18 | 1983-11-23 | Hella KG Hueck & Co. | Non dazzling vehicle headlamp |
| EP0277349A2 (en) * | 1987-02-03 | 1988-08-10 | Hella KG Hueck & Co. | Headlamp unit for vehicles |
| GB2245697A (en) * | 1990-05-01 | 1992-01-08 | Jaguar Cars | Vehicle lamps |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3322181C2 (en) * | 1983-06-21 | 1985-10-10 | Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt | Lights for motor vehicles, in particular fog lights |
| DE3633662A1 (en) * | 1986-10-03 | 1988-04-14 | Hermann Hablitzel | Lens for front headlamps or the like for fitting in vehicles |
| JPH0320961Y2 (en) * | 1986-12-23 | 1991-05-08 | ||
| DE3942310A1 (en) * | 1989-12-21 | 1991-06-27 | Bayerische Motoren Werke Ag | MOTOR VEHICLE HEADLIGHT |
-
1992
- 1992-07-28 DE DE4224865A patent/DE4224865A1/en not_active Withdrawn
-
1993
- 1993-07-02 EP EP93110566A patent/EP0581048B1/en not_active Expired - Lifetime
- 1993-07-02 DE DE59307195T patent/DE59307195D1/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB214002A (en) * | 1923-01-18 | 1924-04-17 | William Thomas Coulson | An improved motor head light |
| EP0094519A2 (en) * | 1982-05-18 | 1983-11-23 | Hella KG Hueck & Co. | Non dazzling vehicle headlamp |
| EP0277349A2 (en) * | 1987-02-03 | 1988-08-10 | Hella KG Hueck & Co. | Headlamp unit for vehicles |
| GB2245697A (en) * | 1990-05-01 | 1992-01-08 | Jaguar Cars | Vehicle lamps |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050705A (en) * | 1997-02-06 | 2000-04-18 | Robert Bosch Gmbh | Vehicle headlight having predetermined light projecting characteristics |
| FR2770618A1 (en) * | 1997-11-04 | 1999-05-07 | Valeo Vision | ELLIPTICAL SPOTLIGHT WITH ENLARGED LIGHTING RANGE |
| US6155702A (en) * | 1997-11-04 | 2000-12-05 | Valeo Vision | Elliptical headlamp with enlarged illuminating area |
| DE19906527A1 (en) * | 1999-02-17 | 2000-08-31 | Volkswagen Ag | Vehicle headlights |
| EP1710494A1 (en) * | 2005-04-07 | 2006-10-11 | Hella KGaA Hueck & Co. | Headlight for vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0581048B1 (en) | 1997-08-27 |
| DE59307195D1 (en) | 1997-10-02 |
| DE4224865A1 (en) | 1994-02-03 |
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