EP0636831B1 - Screen for a non-dazzling headlamp of a motor vehicle - Google Patents

Screen for a non-dazzling headlamp of a motor vehicle Download PDF

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Publication number
EP0636831B1
EP0636831B1 EP94110859A EP94110859A EP0636831B1 EP 0636831 B1 EP0636831 B1 EP 0636831B1 EP 94110859 A EP94110859 A EP 94110859A EP 94110859 A EP94110859 A EP 94110859A EP 0636831 B1 EP0636831 B1 EP 0636831B1
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EP
European Patent Office
Prior art keywords
shielding device
reflector
supporting arm
opening
web
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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.)
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EP94110859A
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German (de)
French (fr)
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EP0636831A1 (en
Inventor
Gerhard Rotgeri
Christoph Reichelt
Hubert Borgschulte
Franz-Josef Kalze
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Hella GmbH and Co KGaA
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Hella KGaA Huek and Co
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Publication of EP0636831A1 publication Critical patent/EP0636831A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43Illuminating 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47Attachment thereof

Definitions

  • the invention relates to a shading device of a dimmed headlamp for vehicles, which is used to shield at least a portion of the light rays which emanate directly from a light source of the headlamp, and which is made of sheet metal and has a single support arm which is in the mounting position of the shading device runs above or below the optical axis, and consists of a leg directed against the light exit direction, which is fastened with the free end section in an opening of the reflector, and of a leg running transversely to the optical axis, which at its end facing the optical axis carries a hollow cylinder, which is the lighting part of the shader and whose central axis coincides with the optical axis of the reflector.
  • the reflector of the headlamp is bowl-shaped and has an opening in the area of its apex, which serves to receive a lamp, the filament of which is the light source of the headlamp.
  • the support arm of the shader made of sheet metal runs above and parallel to the optical axis of the reflector and carries at its end directed in the light exit direction a cap which is the part of the shader that is effective in terms of lighting technology.
  • the cap shields light rays emanating directly from the light source, which are directed towards the light exit direction and upwards and which are directed towards the upper outer edge region of the reflector. Therefore there is no risk of dazzling oncoming traffic.
  • the support arm consists of a sheet metal strip, the wide side surfaces of which run horizontally.
  • the known from DE-PS 599 958 shading a dimmed headlight for vehicles has a two-part shading, which is composed of a light shielding cap and a support arm.
  • the support arm is L-shaped.
  • One leg of the L-shaped support arm runs parallel to the light exit direction and is fixed with its free end in an opening of the reflector, while the other leg of the support arm runs perpendicular to the optical axis and carries the cap at its free end.
  • the shading device can be attached to the reflector at a greater or lesser distance from the optical axis. Because of the two-part design of the shader, caps of different sizes can also be attached to the support arm.
  • the shading device or at least its support arm can be used universally for reflectors of different designs.
  • the disadvantage here is that the shader is very expensive to manufacture because of its two parts and has a thin support arm through which the cap shielding the light rays is not carried free of vibration during driving. In the event of vibration, the connection between the cap and the support arm can become loose and there is a risk of dazzling oncoming traffic.
  • the lighting-technically effective part of the shader consists of a hollow cylinder, the longitudinal axis of which coincides with the optical axis of the reflector.
  • the hollow cylinder is designed to be adjustable parallel to the light exit direction and is supported by an L-shaped support arm, the leg of which runs parallel to the optical axis in an opening of the Reflector is guided axially.
  • the hollow cylinder is adjustable so that it shields the light rays in a certain position, which are directed upwards and downwards to the light exit opening of the reflector and which are directed to the upper and lower outer edge region of the reflector.
  • the support arm In order to shield the light rays emerging from the front opening of the hollow cylinder, it is common today to make the free end section of the glass bulb of the lamp opaque by means of blackening. So that the large-area hollow cylinder, which thus has a large mass, is carried vibration-free by the support arm, the support arm has a correspondingly large cross section. Such a shader can therefore not be made in one piece from sheet metal.
  • the object of the invention is to design the shading of a dimmed headlamp for vehicles described in the preamble of claim 1 in such a way that the shading does not have to be composed of several parts and the support arm also carries the light-effective hollow cylinder vibration-free when the shading with his Support arm is made of a thin-walled sheet.
  • the shading device should also have sufficient rigidity without additional holding elements.
  • the shader consists of a thin-walled sheet metal, because of its low mass it can also be used in a thin-walled reflector made of plastic, without there being a risk of vibration from the reflector for the shader. Because of its double structure and because its main surface runs in a vertical plane, the support arm can absorb the large vertical forces that occur during operation due to vibrations. In mass production, it is very advantageous if the shading device is made by a follow-up tool because of the folding of its two symmetrical halves. If the shading device is to be used with another reflector with a different lamp and / or a differently shaped reflector, the length of its hollow cylinder must be adjusted accordingly.
  • the shading device can also be used with openings of different dimensions in the reflector.
  • the shader After its assembly, the shader has a sufficiently high rigidity, since the two symmetrical halves are held together on opposite sides. The two symmetrical halves are held together on one side by the web connecting them and on the other side by fastening the double free end sections to the reflector.
  • the double free end section of the support arm tapers towards its free end and is pushed into the opening of the reflector in a self-locking manner, the two parts of the double bearing with opposite sides being supported on the inside of the reflector and pressed with facing sides lie together.
  • the double free end section of the support arm is composed of an outer and an inner part with a U-shaped cross section, the inner U-shaped part with the free edge of its legs protrudes the legs of the outer part and is pressed into the inside of the opening of the reflector with plastic deformation and the outer U-shaped part lies on the outside with the outer side of its web connecting the legs on the inside of the opening of the reflector.
  • at least one free edge of the legs of the inner U-shaped part is provided with at least one tooth which serves as a barb and which points with its tip against the insertion direction of the support arm.
  • the two parts of the double support arm which lie against one another are precisely fixed to one another, and after the double support arm has been inserted into the opening of the reflector, the latter is securely locked on the reflector. It is also advantageous here if the web of the outer U-shaped part runs in one plane and lies flat against a flattened inner side section of the opening of the reflector. As a result, the shader does not have to be precisely pre-adjusted in the opening of the reflector, since it adjusts itself in the opening and thus ensures after insertion that the hollow cylinder is arranged precisely in relation to the light source and the reflector.
  • the double free end section of the support arm has at least one radially outward projection on the edge region of the support arm which is directed counter to the insertion direction of the support arm Opening of the reflector is present.
  • the shader is precisely fixed in its insertion direction.
  • the bending line of the symmetrical halves of the shader runs transverse to the optical axis of the reflector.
  • the two half-shells can be formed together by a tool part, and it is certain that the two half-shells are exactly opposite one another after the folding of the two symmetrical halves.
  • the two symmetrical halves of the shader are connected to one another by a web both on the side of the half-shell facing away from the support arm and on the side of the double support arm. This keeps the two halves securely together.
  • the support arm extends with the end of its leg extending transversely to the direction of insertion towards the optical axis up to the outer edge of the hollow cylinder directed in the light exit direction and merges into it at the outer edge of the hollow cylinder.
  • the two half-shells each merge into a flat edge section on the side facing away from the support arm, from which one projects above the other and with an angled end section covers others.
  • the angled end section shields light rays which pass between the edge sections of the two half-shells when they are not directly adjacent to one another.
  • the web adjacent to the support arm and connecting the two symmetrical halves runs at a distance from the half-shells and if a flag is cut free from the edge of a part of the double support arm between the web and the half-shells, which is angled and the double support arm, seen against the light exit direction, covers between the web and the half-shells.
  • the flag is used to shield light rays emerging from the light source, which can pass between the two parts of the double support arm.
  • the flag makes it possible to make the web, which is adjacent to the support arm, as narrow as possible in order to achieve that only a small force is required to fold the two symmetrical halves.
  • the opening used to fasten the support arm is introduced in an attachment which is connected to the inside of the reflector and points in the direction of light exit. Due to the length of the extension, the position of the universal shader in the direction of insertion can be precisely determined.
  • the dimmed headlamp for vehicles shown in FIG. 1 consists of a bowl-shaped reflector (7) made of plastic, which has a rectangular light exit opening through an upper and lower flattening (32).
  • the reflector (7) is sealed on its side with the rectangular light exit opening by a translucent cover plate (33) and has an opening (34) in the area of its apex.
  • the opening (34) serves to receive a lamp (35) inserted from the rear of the reflector (7).
  • the base of the lamp (35) is fastened to the reflector (7) with holding elements (not shown) and the lamp (35) projects with a cylindrical glass bulb, the longitudinal axis of which coincides with the optical axis (3) of the reflector (7) the inside of the reflector (7).
  • the light source (1) formed by an incandescent filament is arranged in the interior of the glass bulb of the lamp (35).
  • the reflector (7) has a reflection surface (38) which bundles light beams from the light source (1) in such a way that there is a light bundle emerging from the headlight and directed towards the road with a light-dark boundary.
  • the light-dark boundary of the light beam means that oncoming traffic is not exposed to glare.
  • the glass bulb of the lamp (35) is provided at its free end with a black lacquer layer (36) which shields light rays emanating from the light source (1) and directed towards the front.
  • a hollow cylinder (9) of a shader made of sheet metal is used to shield light rays emerging from the light source (1).
  • the longitudinal axis of the hollow cylinder (9) coincides with the optical axis (3) of the reflector (7) and is arranged between the light source (1) and the cover plate (33).
  • the hollow cylinder (9) shields the light rays from the light source (1) which are directed onto the rectangular light exit surface of the reflector (7) and are not already shielded by the lacquer layer (36) of the lamp (35) and which are directed towards the flattened portions (32) and between the flats (32) extending reflector surfaces are directed.
  • the flattened portions (32) of the reflector (7) are shaded by the hollow cylinder (9), since otherwise glaring interfering rays will result from oncoming traffic.
  • the hollow cylinder (9) of the shader is carried by an L-shaped support arm (2), which is fastened with the free end section (5) of its leg (4) directed against the light exit direction in an opening (6) of the reflector (7) and which is connected to the hollow cylinder (9) at the end of a leg (8) facing the optical axis (3).
  • the L-shaped support arm runs below the optical axis (3) and in the vertical center plane of the headlamp.
  • the shader is punched out of a thin-walled sheet metal plate and, as can be clearly seen in FIG. 4, consists of two approximately identical symmetrical halves (13 and 14), the axis of symmetry of which coincides with a bending line (10) which is perpendicular to the optical axis (3) and around which the two halves (13 and 14) are folded together.
  • the support arm (4) consists of the two parts (23 and 24) which, after the two halves (13 and 14) have been folded together, produce the double support arm (2).
  • a half-shell (11 and 12) is arranged above each of the two parts (23 and 24) of the support arm (2), which are directly opposite one another after the folding of the shading device and form the hollow cylinder (9).
  • the two halves (13 and 14) of the shader are connected to one another above by a web (15) and below by a web (22).
  • the web (15) merges into an upwardly directed edge section (27 and 28) of the two half-shells (11 and 12).
  • the edge section (28) projects upwards with the end section (29) Edge section (27).
  • the end section (29) is angled about a bending line running parallel to the optical axis (3) to the adjacent edge section (27).
  • a flag (30) is formed on the part (24) of the support arm (4), which is angled and, viewed against the light exit direction, the double support arm (2) between covers the web (22) and the hollow cylinder (9).
  • an L-shaped channel (26 and 25) is pressed over their entire length.
  • the cross section of the L-shaped channel (25) is smaller and, when the shading device is folded together, it engages in the channel (26) which is correspondingly larger in cross section.
  • the double free end section (5) of the support arm (2) is U-shaped in cross section and consists of the outer part (16) of U-shaped cross section and the inner part (17) of U-shaped cross section.
  • the web connecting the legs of the two parts (16 and 17) runs in one plane, and the legs of the U-shaped inner part (17) protrude beyond the legs of the U-shaped outer part (16) and have at their edge serving as barbs Teeth (19).
  • the U-shaped end section (5) of the support arm (2) tapers towards its free end with the toothed edge of the inner part (17) and the web (18) of the outer part (16) towards its free end .
  • the opening (6) of the reflector (2) is formed by a blind bore, which is made in an extension (31) of the reflector (7) directed in the light exit direction.
  • the shading device After inserting the free end section (5) of its support arm (2), the shading device lies in the blind bore of the reflector (7) with the flattened web (18) of the outer U-shaped part (16) on a flattened inner side section (20) of the blind bore of the reflector (7), and the teeth (19) of the inner U-shaped part (17) serving as barbs are pressed into the side of the blind hole opposite in the flattened inner side section (20).
  • the free arm (2) of the support arm (2) is so far into the blind hole inserted until it rests with projections (21) connected to the legs of the U-shaped part (17) on the top surface of the extension (31) directed in the light exit direction.
  • the hollow cylinder (9) with the edge (37) directed towards the reflection surface (38) of the reflector has such a course that the surface sections of the reflector (7) shaded by it no longer extend into the effective reflection surface (36) as necessary extend.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Description

Die Erfindung bezieht sich auf einen Abschatter eines abgeblendeten Scheinwerfers für Fahrzeuge, welcher zur Abschirmung zumindest eines Teils der Lichtstrahlen dient, die direkt von einer Lichtquelle des Scheinwerfers ausgehen, und welcher aus Blech hergestellt ist und einen einzigen Tragarm aufweist, welcher in der Anbaulage des Abschatters oberhalb oder unterhalb der optischen Achse verläuft, und aus einem entgegen der Lichtaustrittsrichtung gerichteten Schenkel, welcher mit dem freien Endabschnitt in einer Öffnung des Reflektors befestigt ist, und aus einem quer zur optischen Achse verlaufenden Schenkel besteht, welcher an seinem zur optischen Achse hin gerichteten Ende einen Hohlzylinder trägt, der der lichttechnisch wirksame Teil des Abschatters ist und dessen Mittelachse mit der optischen Achse des Reflektors zusammenfällt.The invention relates to a shading device of a dimmed headlamp for vehicles, which is used to shield at least a portion of the light rays which emanate directly from a light source of the headlamp, and which is made of sheet metal and has a single support arm which is in the mounting position of the shading device runs above or below the optical axis, and consists of a leg directed against the light exit direction, which is fastened with the free end section in an opening of the reflector, and of a leg running transversely to the optical axis, which at its end facing the optical axis carries a hollow cylinder, which is the lighting part of the shader and whose central axis coincides with the optical axis of the reflector.

Aus der DE-OS 2 000 336 ist ein Abschatter eines abgeblendeten Scheinwerfers für Fahrzeuge bekannt. Der Reflektor des Scheinwerfers ist schalenförmig ausgeführt und weist im Bereich seines Scheitels eine Öffnung auf, welche zur Aufnahme einer Lampe dient, deren Glühwendel die Lichtquelle des Scheinwerfers ist. Der Tragarm des aus Blech hergestellten Abschatters verläuft oberhalb und parallel zur optischen Achse des Reflektors und trägt an seinem in Lichtaustrittsrichtung gerichteten Ende eine Kappe, welche der lichttechnisch wirksame Teil des Abschatters ist. Die Kappe schirmt direkt von der Lichtquelle ausgehende Lichtstrahlen ab, welche zur Lichtaustrittsrichtung und nach oben hin gerichtet sind und welche auf den oberen äußeren Randbereich des Reflektors hin gerichtet sind. Deshalb besteht für den Gegenverkehr keine Blendgefahr. Der Tragarm besteht aus einem Blechstreifen, dessen breite Seitenflächen horizontal verlaufen. Dadurch ist im Fahrbetrieb die Vibrationsgefahr für den Abschatter sehr groß, insbesondere dann, wenn die Kappe wegen einer großflächigen Gestaltung eine entsprechend große Masse aufweist. Eine großflächige Kappe kann gewünscht sein, wenn nicht nur nach oben hin gerichtete, sondern auch nach unten hin gerichtete Lichtstrahlen abgeschirmt werden sollen.From DE-OS 2 000 336 a shading of a dimmed headlight for vehicles is known. The reflector of the headlamp is bowl-shaped and has an opening in the area of its apex, which serves to receive a lamp, the filament of which is the light source of the headlamp. The support arm of the shader made of sheet metal runs above and parallel to the optical axis of the reflector and carries at its end directed in the light exit direction a cap which is the part of the shader that is effective in terms of lighting technology. The cap shields light rays emanating directly from the light source, which are directed towards the light exit direction and upwards and which are directed towards the upper outer edge region of the reflector. Therefore there is no risk of dazzling oncoming traffic. The support arm consists of a sheet metal strip, the wide side surfaces of which run horizontally. As a result, the risk of vibrations for the shader is very great during driving, in particular when the cap has a large design has a correspondingly large mass. A large-area cap may be desired if not only rays of light directed upwards but also downwards are to be shielded.

Der aus der DE-PS 599 958 bekannte Abschatter eines abgeblendeten Scheinwerfers für Fahrzeuge weist einen zweiteilig ausgeführten Abschatter auf, welcher aus einer Lichtstrahlen abschirmenden Kappe und einem Tragarm zusammengesetzt ist. Der Tragarm ist L-förmig gestaltet. Ein Schenkel des L-förmigen Tragarms verläuft parallel zur Lichtaustrittsrichtung und ist mit seinem freien Ende in einer Öffnung des Reflektors befestigt, während der andere Schenkel des Tragarms senkrecht zur optischen Achse verläuft und an seinem freien Ende die Kappe trägt. Der Abschatter kann je nach der Länge des senkrechten Schenkels des L-förmigen Tragarms in einem mehr oder weniger großen Abstand zur optischen Achse an dem Reflektor befestigt werden. Wegen der Zweiteiligkeit des Abschatters können an dem Tragarm auch unterschiedlich große Kappen befestigt werden. Dadurch und wegen der L-Form des Tragarms kann der Abschatter oder zumindest sein Tragarm universell für unterschiedlich gestaltete Reflektoren verwendet werden. Nachteilig hierbei ist es, daß der Abschatter wegen seiner Zweiteiligkeit sehr kostenintensiv in seiner Herstellung ist und einen dünnen Tragarm aufweist, durch welchen die die Lichtstrahlen abschirmende Kappe im Fahrbetrieb nicht vibrationsfrei getragen ist. Bei einer Vibration kann sich die Verbindung zwischen der Kappe und dem Tragarm lösen, und es besteht für den Gegenverkehr Blendgefahr.The known from DE-PS 599 958 shading a dimmed headlight for vehicles has a two-part shading, which is composed of a light shielding cap and a support arm. The support arm is L-shaped. One leg of the L-shaped support arm runs parallel to the light exit direction and is fixed with its free end in an opening of the reflector, while the other leg of the support arm runs perpendicular to the optical axis and carries the cap at its free end. Depending on the length of the vertical leg of the L-shaped support arm, the shading device can be attached to the reflector at a greater or lesser distance from the optical axis. Because of the two-part design of the shader, caps of different sizes can also be attached to the support arm. Because of this and because of the L-shape of the support arm, the shading device or at least its support arm can be used universally for reflectors of different designs. The disadvantage here is that the shader is very expensive to manufacture because of its two parts and has a thin support arm through which the cap shielding the light rays is not carried free of vibration during driving. In the event of vibration, the connection between the cap and the support arm can become loose and there is a risk of dazzling oncoming traffic.

Bei dem aus der AU-PS 14 676 bekannten Abschatter eines abgeblendeten Scheinwerfers für Fahrzeuge besteht der lichttechnisch wirksame Teil des Abschatters aus einem Hohlzylinder, dessen Längsachse mit der optischen Achse des Reflektors zusammenfällt. Der Hohlzylinder ist parallel zur Lichtaustrittsrichtung verstellbar ausgeführt und durch einen L-förmigen Tragarm getragen, dessen parallel zur optischen Achse verlaufender Schenkel in einer Öffnung des Reflektors axial geführt ist. Der Hohlzylinder ist so einstellbar, daß er in einer bestimmten Stellung die Lichtstrahlen abschirmt, welche nach oben und nach unten hin zur Lichtaustrittsöffnung des Reflektors gerichtet sind und welche auf den oberen und unteren äußeren Randbereich des Reflektors gerichtet sind. Um die aus der vorderen Öffnung des Hohlzylinders austretenden Lichtstrahlen abzuschirmen, ist es heute üblich, den freien Endabschnitt des Glaskolbens der Lampe durch eine Schwärzung lichtundurchlässig zu machen. Damit der großflächig gestaltete Hohlzylinder, welcher somit eine große Masse hat, vibrationsfrei von dem Tragarm getragen ist, weist der Tragarm einen entsprechend großen Querschnitt auf. Ein solcher Abschatter kann deshalb nicht einstückig aus Blech hergestellt werden.In the shader of a dimmed headlight for vehicles known from AU-PS 14 676, the lighting-technically effective part of the shader consists of a hollow cylinder, the longitudinal axis of which coincides with the optical axis of the reflector. The hollow cylinder is designed to be adjustable parallel to the light exit direction and is supported by an L-shaped support arm, the leg of which runs parallel to the optical axis in an opening of the Reflector is guided axially. The hollow cylinder is adjustable so that it shields the light rays in a certain position, which are directed upwards and downwards to the light exit opening of the reflector and which are directed to the upper and lower outer edge region of the reflector. In order to shield the light rays emerging from the front opening of the hollow cylinder, it is common today to make the free end section of the glass bulb of the lamp opaque by means of blackening. So that the large-area hollow cylinder, which thus has a large mass, is carried vibration-free by the support arm, the support arm has a correspondingly large cross section. Such a shader can therefore not be made in one piece from sheet metal.

Aufgabe der Erfindung ist es, den im Oberbegriff des Anspruchs 1 beschriebenen Abschatter eines abgeblendeten Scheinwerfers für Fahrzeuge derart zu gestalten, daß der Abschatter nicht aus mehreren Teilen zusammengesetzt sein muß und der Tragarm den lichttechnisch wirksamen Hohlzylinder auch dann vibrationsfrei trägt, wenn der Abschatter mit seinem Tragarm aus einem dünnwandigen Blech hergestellt ist. Darüber hinaus soll der Abschatter auch ohne zusätzliche Halteelemente eine ausreichende Steifigkeit aufweisen.The object of the invention is to design the shading of a dimmed headlamp for vehicles described in the preamble of claim 1 in such a way that the shading does not have to be composed of several parts and the support arm also carries the light-effective hollow cylinder vibration-free when the shading with his Support arm is made of a thin-walled sheet. In addition, the shading device should also have sufficient rigidity without additional holding elements.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß

  • der Abschatter zusammen mit seinem einzigen Tragarm einstückig aus einer Blechplatine ausgestanzt ist und in seinem Blechzuschnitt aus zwei annähernd gleich großen symmetrischen Hälften besteht, deren Symmetrieachse mit einer Biegelinie zusammenfällt, um die beide Hälften zusammengefaltet sind,
  • der Tragarm in seiner gesamten Länge gedoppelt ist, derart daß er in der Einbaulage mit breiten Seitenflächen in einer Vertikalebene verläuft,
  • der lichttechnisch wirksame Hohlzylinder des Abschatters aus zwei Halbschalen der beiden symmetrischen Hälften zusammengesetzt ist,
  • die beiden symmetrischen Hälften des Abschatters auf der dem Tragarm abgewandten Seite der Halbschalen durch einen Steg unmittelbar miteinander verbunden sind, durch welchen die Biegelinie für die symmetrischen Hälften des Abschatters verläuft.
This object is achieved according to the invention in that
  • the shading device, together with its single support arm, is punched out in one piece from a sheet metal blank and consists in its sheet metal blank of two approximately equal symmetrical halves, the axis of symmetry of which coincides with a bending line, around which the two halves are folded,
  • the support arm is doubled over its entire length, so that it runs in the installed position with wide side surfaces in a vertical plane,
  • the light-technical hollow cylinder of the shader is composed of two half-shells of the two symmetrical halves,
  • the two symmetrical halves of the shader are directly connected to one another on the side of the half-shells facing away from the support arm by a web through which the bending line for the symmetrical halves of the shader runs.

Besteht der Abschatter aus einem dünnwandigen Blech, so kann er wegen seiner geringen Masse auch bei einem aus Kunststoff hergestellten, dünnwandigen Reflektor verwendet werden, ohne daß für den Abschatter eine Vibrationsgefahr durch den Reflektor besteht. Der Tragarm kann wegen seiner Doppelung und weil seine Hauptfläche in einer Vertikalebene verläuft, die im Fahrbetrieb durch Erschütterungen auftretenden großen vertikalen Kräfte aufnehmen. In der Massenfertigung ist es sehr vorteilhaft, wenn der Abschatter wegen der Faltung seiner beiden symmetrischen Hälften durch ein Folgewerkzeug hergestellt wird. Soll der Abschatter bei einem anderen Reflektor mit einer anderen Lampe und/oder einem anders geformten Reflektor verwendet werden, so muß die Länge seines Hohlzylinders entsprechend abgestimmt sein. Um dies zu erreichen, müssen in einem Folgewerkzeug lediglich die die Länge des Hohlzylinders bestimmenden Werkzeugteile ausgetauscht werden. Da der mit seinem freien Ende an dem Reflektor befestigbare Schenkel des Tragarms wegen der L-Form des Tragarms in einem entsprechend großen Abstand zur optischen Achse verläuft, kann der Abschatter auch bei unterschiedlich groß gestalteten Öffnungen des Reflektors verwendet werden. Der Abschatter weist nach seiner Montage eine ausreichend große Steifigkeit auf, da die beiden symmetrischen Hälften auf sich gegenüberliegenden Seiten zusammengehalten sind. Die beiden symmetrischen Hälften sind auf einer Seite durch den sie verbindenden Steg und auf der anderen Seite durch das Befestigen der gedoppelten freien Endabschnitte an dem Reflektor zusammengehalten.If the shader consists of a thin-walled sheet metal, because of its low mass it can also be used in a thin-walled reflector made of plastic, without there being a risk of vibration from the reflector for the shader. Because of its double structure and because its main surface runs in a vertical plane, the support arm can absorb the large vertical forces that occur during operation due to vibrations. In mass production, it is very advantageous if the shading device is made by a follow-up tool because of the folding of its two symmetrical halves. If the shading device is to be used with another reflector with a different lamp and / or a differently shaped reflector, the length of its hollow cylinder must be adjusted accordingly. To achieve this, only the tool parts that determine the length of the hollow cylinder have to be replaced in a follow-on tool. Since the leg of the support arm that can be attached to the reflector with its free end runs at a correspondingly large distance from the optical axis because of the L-shape of the support arm, the shading device can also be used with openings of different dimensions in the reflector. After its assembly, the shader has a sufficiently high rigidity, since the two symmetrical halves are held together on opposite sides. The two symmetrical halves are held together on one side by the web connecting them and on the other side by fastening the double free end sections to the reflector.

Weiterhin ist es vorteilhaft, wenn der gedoppelte freie Endabschnitt des Tragarms sich zu seinem freien Ende hin verjüngt und selbstklemmend in die Öffnung des Reflektors eingeschoben ist, wobei die beiden Teile der Doppelung mit abgewandten Seiten an der Innenseite des Reflektors sich abstützen und mit zugewandten Seiten gepreßt aneinander liegen. Eine solche Lösung ist einfach und kostengünstig herstellbar. In diesem Zusammenhang ist es weiterhin vorteilhaft, wenn bei einem aus Kunststoff bestehenden Reflektor der gedoppelte freie Endabschnitt des Tragarms aus einem äußeren und einem inneren im Querschnitt U-förmig gestalteten Teil zusammengesetzt ist, wobei der innere U-förmige Teil mit dem freien Rand seiner Schenkel die Schenkel des äußeren Teils überragt und in die Innenseite der Öffnung des Reflektors unter plastischer Verformung eingedrückt ist und der äußere U-förmige Teil außen mit der äußeren Seite seines die Schenkel verbindenden Stegs an der Innenseite der Öffnung des Reflektors anliegt. Hierbei ist es zweckmäßig, wenn zumindest ein freier Rand der Schenkel des inneren U-förmigen Teils mit mindestens einem als Widerhaken dienenden Zahn versehen ist, welcher mit seiner Spitze entgegen der Einsteckrichtung des Tragarms weist. Dadurch sind die aneinanderliegenden beiden Teile des gedoppelten Tragarms zueinander genau fixiert, und nach einem Einstecken des gedoppelten Tragarms in die Öffnung des Reflektors ist dieser sicher an dem Reflektor arretiert. Vorteilhaft ist es hierbei weiterhin, wenn der Steg des äußeren U-förmigen Teils in einer Ebene verläuft und an einem abgeflachten Innenseitenabschnitt der Öffnung des Reflektors flächig anliegt. Dadurch muß der Abschatter nicht genau vorjustiert in die Öffnung des Reflektors eingesetzt werden, da er sich in der Öffnung selbst justiert und somit nach dem Einsetzen sichergestellt ist, daß der Hohlzylinder genau zur Lichtquelle und zum Reflektor angeordnet ist.Furthermore, it is advantageous if the double free end section of the support arm tapers towards its free end and is pushed into the opening of the reflector in a self-locking manner, the two parts of the double bearing with opposite sides being supported on the inside of the reflector and pressed with facing sides lie together. Such a solution is simple and inexpensive to manufacture. In this context, it is also advantageous if, in the case of a reflector made of plastic, the double free end section of the support arm is composed of an outer and an inner part with a U-shaped cross section, the inner U-shaped part with the free edge of its legs protrudes the legs of the outer part and is pressed into the inside of the opening of the reflector with plastic deformation and the outer U-shaped part lies on the outside with the outer side of its web connecting the legs on the inside of the opening of the reflector. In this case, it is expedient if at least one free edge of the legs of the inner U-shaped part is provided with at least one tooth which serves as a barb and which points with its tip against the insertion direction of the support arm. As a result, the two parts of the double support arm which lie against one another are precisely fixed to one another, and after the double support arm has been inserted into the opening of the reflector, the latter is securely locked on the reflector. It is also advantageous here if the web of the outer U-shaped part runs in one plane and lies flat against a flattened inner side section of the opening of the reflector. As a result, the shader does not have to be precisely pre-adjusted in the opening of the reflector, since it adjusts itself in the opening and thus ensures after insertion that the hollow cylinder is arranged precisely in relation to the light source and the reflector.

Ein weiterer Vorteil ist es, wenn der gedoppelte freie Endabschnitt des Tragarms zumindest mit einem radial nach außen gerichteten Vorsprung an dem entgegen der Einsteckrichtung des Tragarms gerichteten Randbereich der Öffnung des Reflektors anliegt. Dadurch ist der Abschatter in seiner Einsteckrichtung genau fixiert.It is a further advantage if the double free end section of the support arm has at least one radially outward projection on the edge region of the support arm which is directed counter to the insertion direction of the support arm Opening of the reflector is present. As a result, the shader is precisely fixed in its insertion direction.

Weiterhin ist es von Vorteil, wenn die Biegelinie der symmetrischen Hälften des Abschatters quer zur optischen Achse des Reflektors verläuft. Dadurch können die beiden Halbschalen gemeinsam durch ein Werkzeugteil geformt werden, und es ist sicher, daß die beiden Halbschalen nach dem Falten der beiden symmetrischen Hälften sich genau gegenüberliegen. In diesem Zusammenhang ist es vorteilhaft, wenn die beiden symmetrischen Hälften des Abschatters sowohl auf der dem Tragarm abgewandten Seite der Halbschale als auch auf der Seite des gedoppelten Tragarms durch einen Steg miteinander verbunden sind. Dadurch sind die beiden Hälften sicher zusammengehalten.It is furthermore advantageous if the bending line of the symmetrical halves of the shader runs transverse to the optical axis of the reflector. As a result, the two half-shells can be formed together by a tool part, and it is certain that the two half-shells are exactly opposite one another after the folding of the two symmetrical halves. In this context, it is advantageous if the two symmetrical halves of the shader are connected to one another by a web both on the side of the half-shell facing away from the support arm and on the side of the double support arm. This keeps the two halves securely together.

Bei einer besonders vorteilhaften Weiterbildung der Erfindung erstreckt sich der Tragarm mit dem zur optischen Achse hin gerichteten Ende seines quer zur Einsteckrichtung verlaufenden Schenkels bis zu dem in Lichtaustrittsrichtung gerichteten äußeren Rand des Hohlzylinders hin und geht an dem äußeren Rand des Hohlzylinders in ihn über. Dadurch kann der die beiden symmetrischen Hälften verbindende Steg, welcher zu dem Tragarm benachbart verläuft, sehr kurz ausgeführt werden.In a particularly advantageous development of the invention, the support arm extends with the end of its leg extending transversely to the direction of insertion towards the optical axis up to the outer edge of the hollow cylinder directed in the light exit direction and merges into it at the outer edge of the hollow cylinder. As a result, the web connecting the two symmetrical halves, which runs adjacent to the support arm, can be made very short.

Weiterhin ist es vorteilhaft, wenn in beide Teile des gedoppelten Tragarms eine annähernd über ihre gesamte Länge verlaufende Rinne eingedrückt ist, von denen eine Rinne in die andere Rinne hineinragt. Dadurch kann, auch wenn die beiden Teile des gedoppelten Tragarms nicht unmittelbar aneinanderliegen, kein Lichtstrahl zwischen ihnen hindurchtreten, und der doppelte Tragarm ist zusätzlich versteift.Furthermore, it is advantageous if a channel running approximately over its entire length is pressed into both parts of the double support arm, one channel of which projects into the other channel. As a result, even if the two parts of the double support arm do not lie directly against one another, no light beam can pass between them, and the double support arm is additionally stiffened.

Vorteilhaft ist es weiterhin, wenn die beiden Halbschalen auf der dem Tragarm abgewandten Seite jeweils in einen ebenen Randabschnitt übergehen, von dem einer den anderen überragt und mit einem abgewinkelten Endabschnitt den anderen abdeckt. Der abgewinkelte Endabschnitt schirmt Lichtstrahlen ab, welche zwischen den Randabschnitten der beiden Halbschalen hindurchgehen, wenn sie nicht unmittelbar aneinanderliegen.It is also advantageous if the two half-shells each merge into a flat edge section on the side facing away from the support arm, from which one projects above the other and with an angled end section covers others. The angled end section shields light rays which pass between the edge sections of the two half-shells when they are not directly adjacent to one another.

Vorteilhaft ist es weiterhin, wenn der dem Tragarm benachbarte und die beiden symmetrischen Hälften verbindende Steg in einem Abstand zu den Halbschalen verläuft und wenn zwischen dem Steg und den Halbschalen aus dem Rand eines Teils des gedoppelten Tragarms eine Fahne freigeschnitten ist, welche abgewinkelt ist und den gedoppelten Tragarm, entgegen der Lichtaustrittsrichtung gesehen, zwischen dem Steg und den Halbschalen abdeckt. Die Fahne dient zum Abschirmen von aus der Lichtquelle austretenden Lichtstrahlen, welche zwischen den beiden Teilen des gedoppelten Tragarms hindurchgehen können. Außerdem ist es durch die Fahne möglich, den Steg, welcher dem Tragarm benachbart ist, so schmal wie möglich auszuführen, um zu erreichen, daß zum Falten der beiden symmetrischen Hälften nur eine kleine Kraft notwendig ist.It is also advantageous if the web adjacent to the support arm and connecting the two symmetrical halves runs at a distance from the half-shells and if a flag is cut free from the edge of a part of the double support arm between the web and the half-shells, which is angled and the double support arm, seen against the light exit direction, covers between the web and the half-shells. The flag is used to shield light rays emerging from the light source, which can pass between the two parts of the double support arm. In addition, the flag makes it possible to make the web, which is adjacent to the support arm, as narrow as possible in order to achieve that only a small force is required to fold the two symmetrical halves.

Außerdem ist es vorteilhaft, wenn die zur Befestigung des Tragarms dienende Öffnung in einem an die Innenseite des Reflektors angebundenen und in Lichtaustrittsrichtung weisenden Ansatz eingebracht ist. Durch die Länge des Ansatzes kann die Lage des universell verwendbaren Abschatters in Einsteckrichtung genau bestimmt werden.In addition, it is advantageous if the opening used to fasten the support arm is introduced in an attachment which is connected to the inside of the reflector and points in the direction of light exit. Due to the length of the extension, the position of the universal shader in the direction of insertion can be precisely determined.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt, und zwar zeigt

Fig. 1
einen mittleren vertikalen Längsschnitt durch einen abgeblendeten Scheinwerfer für Fahrzeuge mit einem aus Blech hergestellten Abschatter,
Fig. 2
eine Ansicht aus Richtung X auf den Abschatter als Einzelteil,
Fig. 3
einen Schnitt nach der Linie A-A,
Fig. 4
eine Abwicklung des Abschatters und
Fig. 5
eine Ansicht aus Richtung Y auf eine Befestigungsöffnung eines Reflektors für den Abschatter.
An embodiment of the invention is shown in the drawing, namely shows
Fig. 1
a middle vertical longitudinal section through a dimmed headlight for vehicles with a shader made of sheet metal,
Fig. 2
a view from the direction X of the shader as a single part,
Fig. 3
a section along the line AA,
Fig. 4
a settlement of the shadows and
Fig. 5
a view from direction Y of a mounting opening of a reflector for the shader.

Der in Fig. 1 dargestellte abgeblendete Scheinwerfer für Fahrzeuge besteht aus einem aus Kunststoff hergestellten, schalenförmigen Reflektor (7), welcher durch eine obere und untere Abflachung (32) eine rechteckförmige Lichtaustrittsöffnung aufweist. Der Reflektor (7) ist auf seiner die rechteckförmige Lichtaustrittsöffnung aufweisenden Seite durch eine lichtdurchlässige Abschlußscheibe (33) dicht abgeschlossen und weist im Bereich seines Scheitels eine Öffnung (34) auf. Die Öffnung (34) dient zur Aufnahme einer von der Rückseite des Reflektors (7) her eingesetzten Lampe (35). Der Sockel der Lampe (35) ist mit Halteelementen (nicht dargestellt) an dem Reflektor (7) befestigt und die Lampe (35) ragt mit einem zylindrischen Glaskolben, dessen Längsachse mit der optischen Achse (3) des Reflektors (7) zusammenfällt, in das Innere des Reflektors (7). Im Inneren des Glaskolbens der Lampe (35) ist die von einer Glühwendel gebildete Lichtquelle (1) angeordnet. Der Reflektor (7) weist eine Reflexionsfläche (38) auf, welche Lichtstrahlen der Lichtquelle (1) derart bündelt, daß ein aus dem Scheinwerfer austretendes und zur Fahrbahn hin gerichtetes Lichtbündel mit einer Hell-Dunkel-Grenze besteht. Durch die Hell-Dunkel-Grenze des Lichtbündels ist der Gegenverkehr keiner Blendgefahr ausgesetzt. Der Glaskolben der Lampe (35) ist an seinem freien Ende mit einer scharzen Lackschicht (36) versehen, welche von der Lichtquelle (1) ausgehende und nach vorn gerichtete Lichtstrahlen abschirmt. Weiterhin dient zur Abschirmung von aus der Lichtquelle (1) austretenden Lichtstrahlen ein Hohlzylinder (9) eines aus Blech hergestellten Abschatters. Die Längsachse des Hohlzylinders (9) fällt mit der optischen Achse (3) des Reflektors (7) zusammen und ist zwischen der Lichtquelle (1) und der Abschlußscheibe (33) angeordnet. Der Hohlzylinder (9) schirmt die Lichtstrahlen der Lichtquelle (1) ab, welche auf die rechteckförmige Lichtaustrittsfläche des Reflektors (7) gerichtet sind und nicht schon durch die Lackschicht (36) der Lampe (35) abgeschirmt sind und welche auf die Abflachungen (32) und zwischen den Abflachungen (32) verlaufenden Reflektorflächen gerichtet sind. Die Abflachungen (32) des Reflektors (7) sind durch den Hohlzylinder (9) abgeschattet, da durch sie sonst den Gegenverkehr blendende Störstrahlen entstehen.The dimmed headlamp for vehicles shown in FIG. 1 consists of a bowl-shaped reflector (7) made of plastic, which has a rectangular light exit opening through an upper and lower flattening (32). The reflector (7) is sealed on its side with the rectangular light exit opening by a translucent cover plate (33) and has an opening (34) in the area of its apex. The opening (34) serves to receive a lamp (35) inserted from the rear of the reflector (7). The base of the lamp (35) is fastened to the reflector (7) with holding elements (not shown) and the lamp (35) projects with a cylindrical glass bulb, the longitudinal axis of which coincides with the optical axis (3) of the reflector (7) the inside of the reflector (7). The light source (1) formed by an incandescent filament is arranged in the interior of the glass bulb of the lamp (35). The reflector (7) has a reflection surface (38) which bundles light beams from the light source (1) in such a way that there is a light bundle emerging from the headlight and directed towards the road with a light-dark boundary. The light-dark boundary of the light beam means that oncoming traffic is not exposed to glare. The glass bulb of the lamp (35) is provided at its free end with a black lacquer layer (36) which shields light rays emanating from the light source (1) and directed towards the front. Furthermore, a hollow cylinder (9) of a shader made of sheet metal is used to shield light rays emerging from the light source (1). The longitudinal axis of the hollow cylinder (9) coincides with the optical axis (3) of the reflector (7) and is arranged between the light source (1) and the cover plate (33). The hollow cylinder (9) shields the light rays from the light source (1) which are directed onto the rectangular light exit surface of the reflector (7) and are not already shielded by the lacquer layer (36) of the lamp (35) and which are directed towards the flattened portions (32) and between the flats (32) extending reflector surfaces are directed. The flattened portions (32) of the reflector (7) are shaded by the hollow cylinder (9), since otherwise glaring interfering rays will result from oncoming traffic.

Der Hohlzylinder (9) des Abschatters ist durch einen L-förmigen Tragarm (2) getragen, welcher mit dem freien Endabschnitt (5) seines entgegen der Lichtaustrittsrichtung gerichteten Schenkels (4) in einer Öffnung (6) des Reflektors (7) befestigt ist und welcher an dem zur optischen Achse (3) gerichteten Ende eines Schenkels (8) mit dem Hohlzylinder (9) verbunden ist. Der L-förmige Tragarm verläuft unterhalb der optischen Achse (3) und in der vertikalen Mittelebene des Scheinwerfers.The hollow cylinder (9) of the shader is carried by an L-shaped support arm (2), which is fastened with the free end section (5) of its leg (4) directed against the light exit direction in an opening (6) of the reflector (7) and which is connected to the hollow cylinder (9) at the end of a leg (8) facing the optical axis (3). The L-shaped support arm runs below the optical axis (3) and in the vertical center plane of the headlamp.

Der Abschatter ist aus einer dünnwandigen Blechplatine ausgestanzt und besteht, wie in Fig. 4 gut zu sehen ist, im Blechzuschnitt aus zwei annähernd gleichgestalteten symmetrischen Hälften (13 und 14), deren Symmetrieachse mit einer Biegelinie (10) zusammenfällt, welche senkrecht zur optischen Achse (3) verläuft und um welche die beiden Hälften (13 und 14) zusammengefaltet sind. Der Tragarm (4) besteht aus den beiden Teilen (23 und 24), welche nach dem Zusammenfalten der beiden Hälften (13 und 14) den gedoppelten Tragarm (2) ergeben. Oberhalb der beiden Teile (23 und 24) des Tragarms (2) ist jeweils eine Halbschale (11 und 12) angeordnet, welche nach dem Zusammenfalten des Abschatters direkt gegenüberliegen und den Hohlzylinder (9) bilden. Die beiden Hälften (13 und 14) des Abschatters sind oberhalb durch einen Steg (15) und unterhalb durch einen Steg (22) miteinander verbunden. Der Steg (15) geht in einen nach oben gerichteten Randabschnitt (27 und 28) der beiden Halbschalen (11 bzw. 12) über. Der Randabschnitt (28) überragt nach oben hin mit dem Endabschnitt (29) den Randabschnitt (27). Der Endabschnitt (29) ist um eine parallel zur optischen Achse (3) verlaufende Biegelinie zum benachbarten Randabschnitt (27) hin abgewinkelt. Zwischen dem Steg (22) und den Halbschalen (11 und 12) ist an dem Teil (24) des Tragarms (4) eine Fahne (30) angeformt, welche abgewinkelt ist und, entgegen der Lichtaustrittsrichtung gesehen, den gedoppelten Tragarm (2) zwischen dem Steg (22) und dem Hohlzylinder (9) abdeckt. In beide L-förmigen Teile (23 und 24) ist über ihre gesamte Länge jeweils eine L-förmige Rinne (26 bzw. 25) eingedrückt. Die L-förmige Rinne (25) ist in ihrem Querschnitt kleiner ausgeführt und greift bei zusammengefaltetem Abschatter in die im Querschnitt entsprechend größer ausgeführte Rinne (26) ein.The shader is punched out of a thin-walled sheet metal plate and, as can be clearly seen in FIG. 4, consists of two approximately identical symmetrical halves (13 and 14), the axis of symmetry of which coincides with a bending line (10) which is perpendicular to the optical axis (3) and around which the two halves (13 and 14) are folded together. The support arm (4) consists of the two parts (23 and 24) which, after the two halves (13 and 14) have been folded together, produce the double support arm (2). A half-shell (11 and 12) is arranged above each of the two parts (23 and 24) of the support arm (2), which are directly opposite one another after the folding of the shading device and form the hollow cylinder (9). The two halves (13 and 14) of the shader are connected to one another above by a web (15) and below by a web (22). The web (15) merges into an upwardly directed edge section (27 and 28) of the two half-shells (11 and 12). The edge section (28) projects upwards with the end section (29) Edge section (27). The end section (29) is angled about a bending line running parallel to the optical axis (3) to the adjacent edge section (27). Between the web (22) and the half-shells (11 and 12), a flag (30) is formed on the part (24) of the support arm (4), which is angled and, viewed against the light exit direction, the double support arm (2) between covers the web (22) and the hollow cylinder (9). In both L-shaped parts (23 and 24) an L-shaped channel (26 and 25) is pressed over their entire length. The cross section of the L-shaped channel (25) is smaller and, when the shading device is folded together, it engages in the channel (26) which is correspondingly larger in cross section.

Der gedoppelte freie Endabschnitt (5) des Tragarms (2) ist im Querschnitt U-förmig gestaltet und besteht aus dem im Querschnitt U-förmig gestalteten äußeren Teil (16) und dem im Querschnitt U-förmig gestalteten inneren Teil (17). Der die Schenkel verbindende Steg der beiden Teile (16 und 17) verläuft in einer Ebene, und die Schenkel des U-förmigen inneren Teils (17) überragen die Schenkel des U-förmigen äußeren Teils (16) und weisen an ihrem Rand als Widerhaken dienende Zähne (19) auf. Der U-förmig gestaltete Endabschnitt (5) des Tragarms (2) verjüngt sich zu seinem freien Ende hin mit dem die Zähne aufweisenden Rand des inneren Teils (17) und dem Steg (18) des äußeren Teils (16) zu seinem freien Ende hin. Die Öffnung (6) des Reflektors (2) ist von einer Sackbohrung gebildet, welche in einen in Lichtaustrittsrichtung gerichteten Ansatz (31) des Reflektors (7) eingebracht ist. Der Abschatter liegt nach dem Einstecken des freien Endabschnitts (5) seines Tragarms (2) in der Sackbohrung des Reflektors (7) mit dem abgeflachten Steg (18) des äußeren U-förmigen Teils (16) an einem abgeflachten Innenseitenabschnitt (20) der Sackbohrung des Reflektors (7) an, und die als Widerhaken dienenden Zähne (19) des inneren U-förmigen Teils (17) sind in die in dem abgeflachten Innenseitenabschnitt (20) gegenüberliegende Seite der Sackbohrung eingedrückt. Der Tragarm (2) ist mit seinem freien Endabschnitt (5) so weit in die Sackbohrung eingeschoben, bis er mit an die Schenkel des U-förmigen Teils (17) angebundenen Vorsprüngen (21) an der in Lichtaustrittsrichtung gerichteten Deckfläche des Ansatzes (31) anliegt.The double free end section (5) of the support arm (2) is U-shaped in cross section and consists of the outer part (16) of U-shaped cross section and the inner part (17) of U-shaped cross section. The web connecting the legs of the two parts (16 and 17) runs in one plane, and the legs of the U-shaped inner part (17) protrude beyond the legs of the U-shaped outer part (16) and have at their edge serving as barbs Teeth (19). The U-shaped end section (5) of the support arm (2) tapers towards its free end with the toothed edge of the inner part (17) and the web (18) of the outer part (16) towards its free end . The opening (6) of the reflector (2) is formed by a blind bore, which is made in an extension (31) of the reflector (7) directed in the light exit direction. After inserting the free end section (5) of its support arm (2), the shading device lies in the blind bore of the reflector (7) with the flattened web (18) of the outer U-shaped part (16) on a flattened inner side section (20) of the blind bore of the reflector (7), and the teeth (19) of the inner U-shaped part (17) serving as barbs are pressed into the side of the blind hole opposite in the flattened inner side section (20). The free arm (2) of the support arm (2) is so far into the blind hole inserted until it rests with projections (21) connected to the legs of the U-shaped part (17) on the top surface of the extension (31) directed in the light exit direction.

Der Hohlzylinder (9) weist mit dem zur Reflexionsfläche (38) des Reflektors hin gerichteten Rand (37) einen solchen Verlauf auf, daß die durch ihn abgeschatteten Flächenabschnitte des Reflektors (7) sich nicht mehr als notwendig in die wirksame Reflexionsfläche (36) hinein erstrecken.The hollow cylinder (9) with the edge (37) directed towards the reflection surface (38) of the reflector has such a course that the surface sections of the reflector (7) shaded by it no longer extend into the effective reflection surface (36) as necessary extend.

Bezugszahlen:Reference numbers:

Abschatter eines abgeblendeten Scheinwerfers für Fahrzeuge

  • (1) Lichtquelle
  • (2) Tragarm
  • (3) optische Achse
  • (4) Schenkel
  • (5) Endabschnitt (6) öffnung
  • (7) Reflektor
  • (8) Schenkel
  • (9) Hohlzylinder
  • (10) Biegelinie
  • (11) Halbschale
  • (12) Halbschale
  • (13) Hälfte
  • (14) Hälfte
  • (15) Steg
  • (16) Teil
  • (17) Teil
  • (18) Steg
  • (19) Zahn
  • (20) Innenseitenabschnitt
  • (21) Vorsprung
  • (22) Steg
  • (23) Teil
  • (24) Teil
  • (25) Rinne
  • (26) Rinne
  • (27) Randabschnitt
  • (28) Randabschnitt
  • (29) Endabschnitt
  • (30) Fahne
  • (31) Ansatz
  • (32) Abflachung
  • (33) Abschlußscheibe
  • (34) Öffnung
  • (35) Lampe
  • (36) Lackschicht
  • (37) Rand
  • (38) Reflexionsfläche
Shading of a dimmed headlight for vehicles
  • (1) light source
  • (2) support arm
  • (3) optical axis
  • (4) thigh
  • (5) end section (6) opening
  • (7) reflector
  • (8) thigh
  • (9) Hollow cylinder
  • (10) bending line
  • (11) half-shell
  • (12) half-shell
  • (13) half
  • (14) half
  • (15) footbridge
  • (16) part
  • (17) part
  • (18) footbridge
  • (19) tooth
  • (20) inside section
  • (21) Head start
  • (22) Bridge
  • (23) part
  • (24) part
  • (25) gutter
  • (26) gutter
  • (27) edge section
  • (28) edge section
  • (29) end section
  • (30) flag
  • (31) Approach
  • (32) flattening
  • (33) Cover disc
  • (34) opening
  • (35) lamp
  • (36) lacquer layer
  • (37) margin
  • (38) reflective surface

Claims (13)

  1. A shielding device of a dipped headlamp for vehicles, which serves for screening at least part of the light rays which emerge directly from a light source (1) of the headlamp, and which is manufactured from sheet metal and has a single supporting arm (2) which, in the fitting position of the shielding device, runs above or below the optical axis (3) and consists of a limb (4) which in the fitting position is aligned in the opposite direction to the direction of light emergence and the free end section (5) of which is fixed in an opening (6) of the reflector (7), and of a limb (8) which in the fitting position runs transversely to the optical axis (3) and which carries a hollow cylinder (9) at its end which in the fitting position is directed towards the optical axis (3), which hollow cylinder is the optically effective part of the shielding device and the centre line of which coincides in the fitting position with the optical axis (3) of the reflector (7), characterised in that
    - the shielding device, together with its single supporting arm (2), is punched in one piece from a sheet metal plate and in its sheet metal blank form (Figure 4) consists of two symmetrical halves (13 and 14) of approximately equal size, the axis of symmetry of which coincides with a bending line (10) around which the two halves (13 and 14) are folded together,
    - the supporting arm (2) is doubled over its entire length in such a way that in the fitting position it extends with broad side faces in a vertical plane,
    - the optically active hollow cylinder (9) of the shielding device is assembled from two half shells (11 and 12) of the two symmetrical halves (13 and 14),
    - on the side of the half shells (11 and 12) remote from the supporting arm (2) the two symmetrical halves (13 and 14) of the shielding device are directly joined to each other by a web (15) through which the bending line (10) for the symmetrical halves (13 and 14) of the shielding device passes.
  2. A shielding device according to claim 1, characterised in that the double free end section (5) of the supporting arm (2) tapers towards its free end and can be inserted in a self-clamping manner in the opening (6) of the reflector (7), wherein the two parts (16 and 17) of the double portion are supported with their sides which face away from each other on the inside of the opening (6) and their mutually facing sides are seated pressed against each other.
  3. A shielding device according to claim 2, characterised in that in the fitting position, with a reflector (7) made of plastic, the double free end section (5) of the supporting arm (2) is assembled from an outer and an inner part (16 and 17) which are of U-shaped form in cross-section, wherein the inner U-shaped part (17) projects with the free edge of its limbs beyond the limbs of the outer part (16) and can be pressed into the inside of the opening (6) of the reflector (7) with plastic deformation in such a way that the outer part (17) is seated with the external face of the web (18) joining its limbs on the inside of the opening (6) of the reflector (7).
  4. A shielding device according to claim 3, characterised in that at least one free edge of the limbs of the inner U-shaped part (17) is provided with at least one tooth (19) serving as a barb, the point of which points in the opposite direction to the direction of insertion of the supporting arm (2).
  5. A shielding device according to claim 3 and 4, characterised in that the web (18) of the outer U-shaped part (16) runs in a plane in such a way that it is capable of being seated flat against a flattened inside section (20) of the opening (6) of the reflector (7).
  6. A shielding device according to any one of claims I to 5, characterised in that the double free end section (5) of the supporting arm (2) is capable of being placed with at least one radially outwardly oriented projection (21) on the edge region of the opening (6) and of the reflector (7), which edge region is oriented opposite to the direction of insertion of the supporting arm (2).
  7. A shielding device according to any one of claims 1 to 6, characterised in that in the fitting position the bending line (10) of the symmetrical opening (13 and 14) of the shielding device runs transversely to the optical axis (3) of the reflector (7).
  8. A shielding device according to claim 7, characterised in that the two symmetrical halves (13 and 14) of the shielding device are joined to each other by a web (15 ; 22) both on the side of the half shells (11 and 12) remote from the supporting arm (2) and on the side of the double supporting arm (2).
  9. A shielding device according to any one of claims 1 to 8, characterised in that in the fitting position the supporting arm (2) extends with the end, which is oriented towards the optical axis, of its limb (8) which runs transversely to the direction of insertion as far as the outer edge, which is oriented in the direction of light emergence, of the hollow cylinder (9), and extends into the hollow cylinder (9) at the outer edge thereof.
  10. A shielding device according to any one of claims 1 to 9, characterised in that a channel (25; 26) is pressed into both parts (23 and 24) of the double supporting arm (2), which channels extend approximately over the entire length of these parts, and one channel (25) of which projects into the other channel (26).
  11. A shielding device according to any one of claims I to 10, characterised in that the two half shells (11 and 12) each extend into a planar edge section (27; 28) on the side remote from the supporting arm (2), one of which edge sections protrudes beyond the other and covers the other with an angled end section (29).
  12. A shielding device according to any one of claims 1 to 11, characterised in that the web (22) which is adjacent to the supporting arm (2) and which joins the two symmetrical halves (13 and 14) runs at a distance from the half shells (11 and 12) and a vane (30) is cut free from the edge of one part (24) of the double supporting arm (2), between the web (22) and the half shells (11 and 12), which vane is angled and which covers the double supporting arm (2) between the web (22) and the half shells (11 and 12), as seen in the fitting position in the opposite direction to the direction of emergence of light.
  13. The application of the shielding device according to any one of claims 1 to 12 in a reflector of a headlamp, characterised in that the opening (6) of the reflector (7) which serves for the fixation of the supporting arm (2) is accommodated in a projection (31) which is joined to the inside of the reflector (7) and which points in the direction of light emergence.
EP94110859A 1993-07-27 1994-07-13 Screen for a non-dazzling headlamp of a motor vehicle Expired - Lifetime EP0636831B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4325142A DE4325142C1 (en) 1993-07-27 1993-07-27 Beam dipping device for vehicle headlamp unit
DE4325142 1993-07-27

Publications (2)

Publication Number Publication Date
EP0636831A1 EP0636831A1 (en) 1995-02-01
EP0636831B1 true EP0636831B1 (en) 1996-12-11

Family

ID=6493805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110859A Expired - Lifetime EP0636831B1 (en) 1993-07-27 1994-07-13 Screen for a non-dazzling headlamp of a motor vehicle

Country Status (3)

Country Link
EP (1) EP0636831B1 (en)
DE (1) DE4325142C1 (en)
ES (1) ES2095704T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10120216A1 (en) * 2001-04-25 2003-01-02 Hella Kg Hueck & Co Headlights for vehicles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739114A1 (en) 1997-09-06 1999-03-11 Hella Kg Hueck & Co Headlights for vehicles
JP3810927B2 (en) * 1998-09-16 2006-08-16 株式会社小糸製作所 Vehicle lighting
JP3638835B2 (en) * 1999-10-19 2005-04-13 株式会社小糸製作所 Vehicle headlamp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE599958C (en) * 1933-04-13 1934-07-12 Herm Riemann Fa Dimming device for headlights of motor vehicles equipped with two-filament lamps
DE2000336A1 (en) * 1969-05-15 1971-01-28 Fahrzeugelek K Ruhla K Veb Automotive headlights
JPH0353365Y2 (en) * 1987-03-31 1991-11-21
US5067054A (en) * 1989-10-11 1991-11-19 Koito Manufacturing Co., Ltd. Beam-forming shade for vehicular headlamp
JPH07109721B2 (en) * 1990-08-07 1995-11-22 株式会社小糸製作所 Vehicle headlights

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10120216A1 (en) * 2001-04-25 2003-01-02 Hella Kg Hueck & Co Headlights for vehicles

Also Published As

Publication number Publication date
EP0636831A1 (en) 1995-02-01
ES2095704T3 (en) 1997-02-16
DE4325142C1 (en) 1994-07-21

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