EP0375975A2 - Bicycle headlight - Google Patents

Bicycle headlight Download PDF

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Publication number
EP0375975A2
EP0375975A2 EP89122062A EP89122062A EP0375975A2 EP 0375975 A2 EP0375975 A2 EP 0375975A2 EP 89122062 A EP89122062 A EP 89122062A EP 89122062 A EP89122062 A EP 89122062A EP 0375975 A2 EP0375975 A2 EP 0375975A2
Authority
EP
European Patent Office
Prior art keywords
light
headlight
shaping elements
external light
pane
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.)
Withdrawn
Application number
EP89122062A
Other languages
German (de)
French (fr)
Other versions
EP0375975A3 (en
Inventor
Hans Knipper
Robert Krieger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PROGRESS KUNSTSTOFF GmbH
Original Assignee
PROGRESS KUNSTSTOFF GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PROGRESS KUNSTSTOFF GmbH filed Critical PROGRESS KUNSTSTOFF GmbH
Publication of EP0375975A2 publication Critical patent/EP0375975A2/en
Publication of EP0375975A3 publication Critical patent/EP0375975A3/en
Withdrawn legal-status Critical Current

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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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Definitions

  • the invention relates to a two-wheel headlight.
  • the invention has for its object to make this disadvantage of the additional attachment of a front-facing reflector dispensable and still give the guarantee that stray light from the front is reflected not only to a small extent in a small cat's eye, but to a greater extent.
  • a two-wheel headlamp the protective pane of which has shaping elements which reflect extraneous light coming from the front by approximately 180 °, the light axis of the reflected extraneous light - deviating from the inclined downward light cone axis of the headlight light - parallel to Longitudinal bicycle axis runs.
  • the total base area of the special shaping elements intended for external light reflection is expediently limited - for example ribs, pyramids or the like - and is limited to approximately half of the total protective pane area, the protective pane being designed as a two-pane construction and the inner pane also being formed on the shaping elements of the outer disc (4) has optically coordinated shaping elements which guide the headlight light past the shaping elements which serve to reflect external light.
  • the two-wheel headlight 1 has the usual housing, on the inside of which the parabolic mirror surface 2 breaks the light rays 7 originating from the incandescent lamp 3 and throws forward through the protective pane 4, the light cone axis 7 'of the headlight light 7, 7, 7,. . . is inclined downwards according to the legal regulation.
  • the protective pane 4 in contrast to known protective panes, is provided with a special shape, the elements 5, 5, 5 of which, for example in the form of ribs or pyramids, deflect an external light 8 incident from the front by approximately 180 ° and reflect back to the front.
  • the light axis 8 'of the reflected extraneous light 8,8,8. . . runs approximately parallel to the road 9 and the longitudinal axis of the two-wheeler, with the light cone axis 7 'of the headlight light 7, 7, 7, ... thus includes an angle alpha.
  • the inner pane likewise having special shaping elements.
  • the free vertical strips 6 of the outer pane 4 can have additional shaped elements 12 to achieve a scattered light effect.
  • the special shape does not need to be distributed over the entire available area to be arranged. So there can be free areas evenly distributed over the larger total area of the protective pane of the headlight for the headlight light.
  • the reflection surface in the proposed solution is much larger and therefore easier to recognize than with a normal, small-sized cat's eye reflector

Landscapes

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

Abstract

The aim is for the extraneous light impinging from ahead to be collected and reflected not only in the slight extent of a small cat's eye possibly provided additionally for this purpose, but to use the entire surface of the front headlight for this purpose. This is achieved by means of a bicycle headlight whose protective lens has shaping elements which reflect extraneous light impinging from ahead by approx. 180 DEG , the optical axis of the reflected extraneous light extending - by contrast with the downwardly directed axis of the luminous cone of the headlight - parallel to the longitudinal axis of the bicycle.

Description

Die Erfindung betrifft einen Zweiradscheinwerfer.The invention relates to a two-wheel headlight.

Es wird allgemein immer stärker als nützlich und not­wendig erachtet, ein Zweirad so auszugestalten, daß es auch bei fehlendem, nicht eingeschaltetem oder nicht funktionsfähigern Frontscheinwerfer von vorn auftreffen­des Fremdlicht reflektiert.It is generally considered more and more useful and necessary to design a two-wheeler in such a way that it reflects external light coming from the front even when the front headlights are missing, not switched on or not functional.

Bislang ist eine derartige Reflexionsfähigkeit bei Zwei­rädern nur für von hinten auftreffendes Fremdlicht vor­geschrieben und verwirklicht.So far, such reflectivity has only been prescribed and implemented for two-wheelers for external light coming from behind.

Die Erfüllung der Forderung nach einer Reflexion des von vorn auftreffenden Fremdlichts fordert also nach dem Stand der Technik die zusätzliche Anbringung eines ei­genen Reflektors (Katzenauges) im Vorderteil des Zwei­rads, der nach vorn ausgerichtet ist.According to the state of the art, the fulfillment of the requirement for a reflection of the external light coming from the front requires the additional attachment of a separate reflector (cat's eye) in the front part of the two-wheeler, which is oriented towards the front.

Der Erfindung liegt die Aufgabe zugrunde, diesen Nachteil der zusätzlichen Anbringung eines nach vorn gerichteten Reflektors entbehrlich zu machen und dennoch die Gewähr dafür zu geben, daß von vorn auftreffendes Fremdlicht nicht nur im geringen Umfang eines kleinen Katzenauges, sondern in einem größerem Umfang zurückgeworfen wird.The invention has for its object to make this disadvantage of the additional attachment of a front-facing reflector dispensable and still give the guarantee that stray light from the front is reflected not only to a small extent in a small cat's eye, but to a greater extent.

Gelöst wird diese Aufgabe nach der Erfindung durch einen Zweiradscheinwerfer, dessen Schutzscheibe Formgebungselemente aufweist, die von vorn auftreffendes Fremdlicht um ca.180° reflektieren, wobei die Lichtachse des reflektierten Fremd­lichts -abweichend von der geneigt nach unten gerichteten Lichtkegelachse des Scheinwerferlichts - parallel zur Zweiradlängsachse verläuft.This object is achieved according to the invention by a two-wheel headlamp, the protective pane of which has shaping elements which reflect extraneous light coming from the front by approximately 180 °, the light axis of the reflected extraneous light - deviating from the inclined downward light cone axis of the headlight light - parallel to Longitudinal bicycle axis runs.

Zweckmäßig ist die Gesamtbasisfläche der besonderen für die Fremdlichtreflexion bestimmten Formgebungselemente -bei­spielsweise Rippen, Pyramiden oder gleichen- begrenzt und auf etwa die Hälfte der gesamten Schutzscheibenfläche be­schränkt, wobei die Schutzscheibe als Zwei-Scheiben-Konstruk­tion ausgebildet ist und die innere Scheibe ebenfalls auf die Formgebungselemente der äußeren Scheibe (4) optisch abgestimmte Formgebungselemente aufweist, die das Scheinwerfer­licht an den der Fremdlichtreflexion dienenden Formgebungsele­menten vorbeilenken.The total base area of the special shaping elements intended for external light reflection is expediently limited - for example ribs, pyramids or the like - and is limited to approximately half of the total protective pane area, the protective pane being designed as a two-pane construction and the inner pane also being formed on the shaping elements of the outer disc (4) has optically coordinated shaping elements which guide the headlight light past the shaping elements which serve to reflect external light.

Nachfolgend wird anhand der Zeichnung eine Ausführungsform der Erfindung näher erläutert.An embodiment of the invention is explained in more detail below with reference to the drawing.

Es zeigen :

  • Figur 1 : eine Querschnittsdarstellung,
  • Figur 2 : eine Vorderansicht des Zweiradscheinwerfers und
  • Figur 3 : einen Teilquerschnitt in vergrößertem Maßstab.
Show it :
  • FIG. 1: a cross-sectional illustration,
  • Figure 2: a front view of the two-wheel headlamp and
  • Figure 3: a partial cross section on an enlarged scale.

Der Zweiradscheinwerfer 1 besitzt das übliche Gehäuse, an dessen Innenseite die Parabolspiegelfläche 2 die von der Glühlampe 3 stammenden Lichtstrahlen 7 bricht und durch die Schutzscheibe 4 nach vorn wirft, wobei die Lichtkegel­achse 7′ des Scheinwerferlichts 7,7,7,. . . entsprechend der gesetzlichen Vorschrift geneigt nach unten gerichtet ist.The two-wheel headlight 1 has the usual housing, on the inside of which the parabolic mirror surface 2 breaks the light rays 7 originating from the incandescent lamp 3 and throws forward through the protective pane 4, the light cone axis 7 'of the headlight light 7, 7, 7,. . . is inclined downwards according to the legal regulation.

Die Schutzscheibe 4 ist bei dem hier gezeigten Beispiel im Unterschied zu bekannten Schutzscheiben mit einer beson­deren Formgebung versehen, deren Elemente 5,5,5,... -bei­spielsweise in Rippen- oder Pyramidenform- ein von vorn auftreffendes Fremdlicht 8 etwa um 180° umlenken und wieder nach vorn reflektieren können.In the example shown here, the protective pane 4, in contrast to known protective panes, is provided with a special shape, the elements 5, 5, 5 of which, for example in the form of ribs or pyramids, deflect an external light 8 incident from the front by approximately 180 ° and reflect back to the front.

Wesentlich ist hierbei, daß die Lichtachse 8′ des re­flektierten Fremdlichts 8,8,8,. . . etwa parallel zur Fahr­bahn 9 und zur Zweiradlängsachse verläuft, mit der Licht­kegelachse 7′ des Scheinwerferlichts 7,7,7,... also einen Winkel alpha einschließt.It is essential here that the light axis 8 'of the reflected extraneous light 8,8,8. . . runs approximately parallel to the road 9 and the longitudinal axis of the two-wheeler, with the light cone axis 7 'of the headlight light 7, 7, 7, ... thus includes an angle alpha.

Es trifft also nur das reflektierte Fremdlicht 8,8,8 das Auge des entgegenkommenden Fahrers und gibt diesem das ge­wünschte Signal, daß ihm ein Zweirad entgegenkommt,welches kein eigenes Scheinwerferlicht abgibt, sondern nur aufge­nommenes Fremdlicht reflektiert.Thus, only the reflected external light 8, 8, 8 strikes the oncoming driver's eye and gives the driver the desired signal that a two-wheeler is coming towards him, which does not emit his own headlight light, but only reflects picked-up external light.

Um zu vermeiden, daß die für die Fremdlichtreflexion be­stimmten Formgebungselemente 5,5,5,. . . den Durchgang des eigenen Scheinwerferlichts zu stark mindern, empfiehlt es sich, zwischen den Formgebungselementen mit den Pyramiden 5,5,5,. . . freie senkrechte Streifen 6 ohne solche Formge­bungselemente zu lassen, durch die hindurch das Scheinwerfer­licht ungehindert hindurchtreten kann und die Schutzscheibe als Zwei-Scheiben-Konstruktion 4,10 au-szubilden, wobei die innere Scheibe ebenfalls besondere Formgebungselemente auf­weist.In order to avoid that the shaping elements 5, 5, 5 intended for the external light reflection. . . To reduce the passage of your own headlight too much, it is recommended to use the pyramids 5,5,5, - between the shaping elements. . . to leave free vertical strips 6 without such shaping elements through which the headlight light can pass unhindered and to form the protective pane as a two-pane construction 4, 10, the inner pane likewise having special shaping elements.

Dies schafft die Voraussetzung dafür, die Formgebungselemente 5 der äußeren Scheibe 4 optisch so auf die Formgebungselemente 11 der inneren Scheibe 10 abzustimmen, daß das Scheinwerfer­licht 7 an den störenden, der Fremdlichtreflexion dienenden Formgebungselementen 5 vorbeigelenkt wird.This creates the prerequisite for optically coordinating the shaping elements 5 of the outer pane 4 with the shaping elements 11 of the inner pane 10 in such a way that the headlight light 7 is directed past the disturbing shaping elements 5 which serve for external light reflection.

Die freien senkrechten Streifen 6 der äußeren Scheibe 4 können zusätzliche Formelemente 12 zur Erzielung eines Streulicht­effektsaufweisen.The free vertical strips 6 of the outer pane 4 can have additional shaped elements 12 to achieve a scattered light effect.

Da hier die im Vergleich zu einem Katzenauge größere Fläche einer Schutzscheibe eines Scheinwerfers für die An­ordnung dieser besonderen, für die Fremdlichtreflexion bestimmten Formgebungselemente zur Verfügung steht, braucht hier, anders als beim normalen Katzenauge, die besondere Form­gebung nicht auf der gesamten zur Verfügung stehenden Fläche verteilt angeordnet zu sein. Es können also freie Flächen gleichmäßig verteilt auf der größeren Gesamtfläche der Schutz­scheibe des Scheinwerfers für das Scheiwerferlicht übrig bleiben.Since here the larger surface of a protective lens of a headlight is available for the arrangement of these special shaping elements, which are intended for the reflection of extraneous light, in contrast to the normal cat eye, the special shape does not need to be distributed over the entire available area to be arranged. So there can be free areas evenly distributed over the larger total area of the protective pane of the headlight for the headlight light.

Die Reflexionsfläche ist bei der vorgeschlagenen Lösung weitaus größer und daher leichter erkennbar als bei einem normalen klein bemessenen Katzenauge-ReflektorThe reflection surface in the proposed solution is much larger and therefore easier to recognize than with a normal, small-sized cat's eye reflector

Claims (3)

1. Zweiradscheinwerfer dadurch gekennzeichnet, daß
- die Schutzscheibe (4) des Scheinwerfers (1) Form­gebungselemente (5,5,5,...) aufweist,
1. two-wheel headlamp, characterized in that
- The protective pane (4) of the headlight (1) has shaping elements (5,5,5, ...),
- die von vorn auftreffendes Fremdlicht (8,8,8,...) um ca. 180° reflektieren,
- wobei die Lichtachse (8′) des reflektierten Fremd­lichts (8,8,8,...) -abweichend von der geneigt nach unten gerichteten Lichtkegelachse (7′) des Schein­werferlichts (7,7,7,. . . )- parallel zur Fahrbahn (9) und zur Zweiradlängsachse verläuft.- reflect the external light (8,8,8, ...) from the front by approx. 180 °,
- The light axis (8 ') of the reflected external light (8,8,8, ...) - deviating from the inclined downward light cone axis (7') of the headlight light (7,7,7, ...) - parallel runs to the roadway (9) and the longitudinal axis of the two-wheeler. 2. Zweiradscheinwerfer nach Anspruch 1, dadurch gekennzeichnet, daß
- die Gesamtbasisfläche der besonderen für die Fremd­lichtreflexion bestimmten Formgebungselemente -bei­spielsweise Rippen, Pyramiden (5,5,5) oder dergleichen­etwa die Hälfte der gesamten Schutzscheibenfläche nicht übersteigt,
- die Schutzscheibe als zwei-Scheiben-Konstruktion (4,10) ausgebildet ist und
- die innere Scheibe (10) ebenfalls auf die Formgebungs­elemente (5,5,5,...) der äußeren Scheibe (4) optisch so abgestimmte Formgebungselemente (11) aufweist, daß
- sie das Scheinwerferlicht (7,7,7,...) an den der Fremdlichtreflexion dienenden Formgebungselementen (5,5,5,...) vorbeilenken.2. Two-wheel headlamp according to claim 1, characterized in that
the total base area of the special shaping elements intended for external light reflection, for example ribs, pyramids (5,5,5) or the like, does not exceed about half of the total protective pane area,
- The protective pane is designed as a two-pane construction (4, 10) and
- The inner disc (10) also on the shaping elements (5,5,5, ...) of the outer disc (4) has optically coordinated shaping elements (11) that
- they guide the headlight light (7,7,7, ...) past the shaping elements (5,5,5, ...) which serve to reflect the external light.
EP19890122062 1988-11-30 1989-11-29 Bicycle headlight Withdrawn EP0375975A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840313A DE3840313A1 (en) 1988-11-30 1988-11-30 TWO WHEEL HEADLIGHTS
DE3840313 1988-11-30

Publications (2)

Publication Number Publication Date
EP0375975A2 true EP0375975A2 (en) 1990-07-04
EP0375975A3 EP0375975A3 (en) 1991-01-09

Family

ID=6368148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890122062 Withdrawn EP0375975A3 (en) 1988-11-30 1989-11-29 Bicycle headlight

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EP (1) EP0375975A3 (en)
DE (1) DE3840313A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3174477B2 (en) * 1995-03-18 2001-06-11 株式会社小糸製作所 Vehicle lighting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1549251A (en) * 1967-08-10 1968-12-13
FR2036971A1 (en) * 1969-04-24 1970-12-31 Cibie Projecteurs
FR2171906A1 (en) * 1972-02-15 1973-09-28 Marken Patente Ag
US3779629A (en) * 1971-06-23 1973-12-18 Lucas Industries Ltd Combined lens and reflector for a vehicle lamp
DE2935410A1 (en) * 1979-09-01 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Indicator light for vehicle - has coloured reflector and inner window with array of lenses and outer cover with lenses and totally-reflecting prisms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE852951C (en) * 1951-07-12 1952-10-20 Lohmann Werke Aktien Ges Rear light for vehicles, especially for bicycles and motorcycles
DD216425A1 (en) * 1983-07-01 1984-12-12 Fahrzeugelektrik Ruhla Bereich BICYCLE LIGHTS

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1549251A (en) * 1967-08-10 1968-12-13
FR2036971A1 (en) * 1969-04-24 1970-12-31 Cibie Projecteurs
US3779629A (en) * 1971-06-23 1973-12-18 Lucas Industries Ltd Combined lens and reflector for a vehicle lamp
FR2171906A1 (en) * 1972-02-15 1973-09-28 Marken Patente Ag
DE2935410A1 (en) * 1979-09-01 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Indicator light for vehicle - has coloured reflector and inner window with array of lenses and outer cover with lenses and totally-reflecting prisms

Also Published As

Publication number Publication date
DE3840313C2 (en) 1993-06-09
EP0375975A3 (en) 1991-01-09
DE3840313A1 (en) 1990-05-31

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