EP0451039B1 - Zwischenscheibe für Fahrzeugrückleuchte und Herstellungsverfahren - Google Patents

Zwischenscheibe für Fahrzeugrückleuchte und Herstellungsverfahren Download PDF

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Publication number
EP0451039B1
EP0451039B1 EP91400877A EP91400877A EP0451039B1 EP 0451039 B1 EP0451039 B1 EP 0451039B1 EP 91400877 A EP91400877 A EP 91400877A EP 91400877 A EP91400877 A EP 91400877A EP 0451039 B1 EP0451039 B1 EP 0451039B1
Authority
EP
European Patent Office
Prior art keywords
grooves
screen
faces
inclination
angles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91400877A
Other languages
English (en)
French (fr)
Other versions
EP0451039A1 (de
Inventor
Daniel Segaud
Bernard Mauroy
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0451039A1 publication Critical patent/EP0451039A1/de
Application granted granted Critical
Publication of EP0451039B1 publication Critical patent/EP0451039B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like

Definitions

  • the present invention relates generally to signaling lights, in particular for motor vehicles, and relates more particularly to a new intermediate screen for signaling lights and a new method for the manufacture thereof.
  • Some signal lights known in the art include a filament lamp, an intermediate screen, and a globe or closing light.
  • a mirror can be provided if necessary to recover as much as possible the flux emitted by the lamp in the direction opposite to the screen and to the indicator.
  • the purpose of the intermediate screen is to straighten the light rays received from the lamp and, where appropriate, from the mirror in order to bring the beam formed to comply with a given photometry. This must be done in such a way that the fire observed from the outside looks as uniform as possible in terms of brightness.
  • the present invention aims to overcome these drawbacks of the prior art and to propose an intermediate screen which is much easier and economical to produce, while giving satisfactory results from an optical point of view.
  • the invention relates to a first aspect, an intermediate screen as defined in claim 1.
  • all the streaks of the sub-assembly or sub-assemblies can be produced by etching a mold using a single cutting tool with two cutting edges of well-defined mutual inclination cuts. , or with a very limited number of such tools.
  • the invention relates to a manufacturing method by machining a half-mold for the production by molding of an intermediate screen for example as defined above, having the characteristics of claim 7.
  • the invention relates to a method of manufacturing by machining a half-mold for the production by molding of a screen.
  • plate-shaped intermediate for example of the type defined above, having the features of claim 8.
  • a motor vehicle signaling light which comprises a lamp 10, a reflector 20, an intermediate screen 30 and a globe or closing light 40.
  • the reflector is conventionally charged to recover the luminous flux emitted towards the bottom of the fire.
  • the purpose of the intermediate screen is to straighten the rays received directly from the lamp so that they participate in the formation of the beam, its design being such that the rays reflected by the reflector 20, after passing through said screen, also continue to participate to the beam, i.e. are not excessively deflected laterally.
  • the intermediate screen 30 comprises a series of concentric streaks, all centered on a reference center C which is the normal projection of the source on the screen, and preferably of small width (of the order of the fraction of millimeter or millimeter).
  • a reference center C which is the normal projection of the source on the screen
  • small width of the order of the fraction of millimeter or millimeter.
  • Each stripe has a V-shaped profile and can be defined on the one hand by its width L, and on the other hand by the angles ⁇ , ⁇ of its two faces of rectilinear and inclined profile, that is to say conical.
  • the indicator 40 preferably comprises, on its inner surface, a series of balls or the like intended to homogenize the light beam obtained.
  • an intermediate screen 30 according to a preferred embodiment of the invention.
  • the screen 30 has three areas distinct denoted Z1, Z2 and Z3, separated by vertical transitions T12 and T23.
  • the lateral zones Z1 and Z3 each comprise, on the inner surface of the plate P constituting the screen 30, a series of concentric grooves.
  • the streaks S1 of the zone Z1 are in the present example all identical, that is to say that the associated parameters L1, ⁇ 1 and ⁇ 1 are the same regardless of the streak S1.
  • the streaks S3 of the zone Z3 all have the same parameters L3, ⁇ 3 and ⁇ 3.
  • At least one area of the screen here the central area Z2
  • the zone Z2 is subdivided into two subzones Z2 ′ and Z2 ⁇ , respectively interior and exterior, the transition between the two subzones taking place along a circular line L2 which is located at the transition between two adjacent streaks.
  • the behavior of the streaks S2 ′ of the zone Z2 ′ is similar, only the opening angle ⁇ 2 ′ being different, as well as possibly the width L2 ′ of the streaks.
  • angles ⁇ and ⁇ which characterize each streak can vary either continuously and progressively as one moves along the streak, or by jumps, for example by angular steps of 360 °.
  • a notable advantage of the present invention lies in that, for the production by machining of a model or of a half-mold which will make it possible to produce screens in large series, the ridges (for example S2 ⁇ ) can be produced at using a single cutting tool, having two cutting edges inclined with respect to each other by the angle ⁇ 2 ⁇ , the inclination of which is simply modified when changing from the engraving of a streak to the engraving of the next streak.
  • each streak is produced by rotating the model M around an axis A perpendicular to the plane of the screen to be produced and passing by its reference center C, while the cutting tool OC is kept fixed. To make the next impression (assumed to be further from the center C), simply lift the tool and move it away from point C by the appropriate distance equal to the pitch of the streaks.
  • the mold is produced according to the above process, but also by modifying the inclination of the cutting tool OC when moving on to the production of the next impression.
  • the cutting tool OC (indicated in dashed lines) is inclined, in the radial plane passing through C, relative to the normal at the surface, by a certain angle ⁇ a adapted to the angles ⁇ a and ⁇ b sought; for the realization of the following streak, the inclination of the cutting tool is modified to become ⁇ b, adapted to the new angles ⁇ b and ⁇ c sought.
  • the method of making the mold is not substantially complicated compared to the techniques conventionally used, only an appropriate angular offset of the cutting tool being to be carried out in addition to its linear offset in the radial direction when passing a streak. to the other.
  • each streak can be produced either in one machining pass or in several passes. In both cases, the advantage remains of not having to make a tool change.
  • each streak zone is produced using a single streak developed in a spiral.
  • the streak is produced without having to lift the cutting tool to pass from one streak to another, but by radially moving said tool in a linear relationship in function of the absolute angle of rotation of the mold around point C.
  • this rectilinear radial displacement of the tool is combined with a pivoting of the latter around a beam essentially perpendicular to the radial plane perpendicular to the surface of the mold and passing in the vicinity of the tool and the reference center C.
  • the angle of inclination of the tool OC progressively changes from the value ⁇ a to the value ⁇ b when the mold rotates by 360 °.
  • all the ridges of the intermediate screen 30 have the same width. They can of course have different widths.
  • the ridges produced in accordance with the present invention may have a profile other than circular or spiral, for example by virtue of a controlled radial displacement of the cutting tool during the rotation of the mold being engraved.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Viewfinders (AREA)

Claims (9)

  1. Zwischenscheibe (30) für Fahrzeugrückleuchten, bestehend aus einer lichtdurchlässigen Platte (P), die zumindest auf einer ihrer Seiten eine Menge von Lichtablenkrillen (S) umfaßt, die in etwa konzentrisch angeordnet und jeweils durch zwei Flächen mit in etwa geraden Profilen und gegebenen Neigungswinkeln (α, β) im Verhältnis zu einer Normalen der Platte definiert sind , dadurch gekennzeichnet, daß sich zumindest bei einer Teilmenge von benachbarten Rillen (S2', S2'') die Neigungswinkel (α2', β2'; α2'', β2'') der Flächen, durch die jede Rille definiert ist, von einer Rille zur anderen verändern und so ausgelegt sind, daß die Summe dieser Winkel (Θ2'; Θ2'') konstant ausfällt.
  2. Zwischenscheibe nach Anspruch 1 , dadurch gekennzeichnet, daß sie zwei seitliche Bereiche (Z1, Z3) umfaßt, die Rillen enthalten, bei denen die Neigungswinkel (α1, β1; α3, β3) der Flächen von einer Rille zur anderen in etwa konstant bleiben.
  3. Zwischenscheibe nach Anspruch 2 , dadurch gekennzeichnet, daß sie außerdem einen mittleren Bereich (Z2) umfaßt, der einen ersten Teilbereich (Z1') von Rillen mit veränderlichen Neigungswinkeln der Flächen enthält, deren Summe gleich einem ersten vorbestimmten Wert ist, sowie einen zweiten Teilbereich (Z2'') von Rillen mit veränderlichen Neigungswinkeln der Flächen, deren Summe gleich einem zweiten vorbestimmten Wert ist.
  4. Zwischenscheibe nach Anspruch 3 , dadurch gekennzeichnet, daß die beiden Unterbereiche (Z2', Z2'') des mittleren Bereichs durch eine Übergangslinie (L2) voneinander getrennt sind, die in etwa kreisförmig und konzentrisch zu den Rillen ausgeführt ist.
  5. Zwischenscheibe nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die seitlichen Bereiche und der mittlere Bereich durch in etwa gerade und vertikale Übergänge (T12, T23) voneinander getrennt sind.
  6. Zwischenscheibe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß Rillen (S) auf beiden Seiten der Platte (P) vorgesehen sind.
  7. Herstellungsverfahren mittels Bearbeitung einer Formhälfte (M) für die mittels Formung erfolgende Anfertigung einer plattenförmigen Zwischenscheibe, beispielsweise nach einem der vorangehenden Ansprüche, wobei für die Herstellung zumindest einer Gruppe von Formeinschnitten, die einer Teilmenge der Rillen der Zwischenscheibe entsprechen, (a) in einem oder mehreren Durchgängen eine erste in etwa kreisförmige Rille anhand eines Schneidwerkzeugs (OC) mit zwei Schneidkanten, die einen bestimmten Winkel zueinander bilden, durch Drehung der Formhälfte um einen Bezugsmittelpunkt (C) ausgeführt wird, dadurch gekennzeichnet, daß (b) das Schneidwerkzeug um einen bestimmten Winkel (Ωb-Ωa) in einer Ebene gedreht wird, die in der Nähe des Schneidwerkzeugs und durch die Drehachse verläuft, und (c) die Schritte (a) und (b) wiederholt werden, um nacheinander alle Rillen der Gruppe auszuführen.
  8. Herstellungsverfahren mittels Bearbeitung einer Formhälfte (M) für die mittels Formung erfolgende Anfertigung einer plattenförmigen Zwischenscheibe, beispielsweise nach einem der Ansprüche 1 bis 6, wobei für die Herstellung zumindest einer Gruppe von Formeinschnitten, die einer Teilmenge der Rillen der Zwischenscheibe entsprechen, anhand eines Schneidwerkzeugs (OC) mit zwei Schneidkanten, die einen bestimmten Winkel zueinander bilden, und in einem oder mehreren Durchgängen eine einzige spiralförmige Rille durch Drehung des Werkstücks um einen Bezugsmittelpunkt ausgeführt wird, dadurch gekennzeichnet, daß sich diese Drehung mit einer kontinuierlichen linearen Verschiebung des Schneidwerkzeugs radial im Verhältnis zum Bezugsmittelpunkt verbindet, wobei sie außerdem mit einer kontinuierlichen Änderung der Neigung des Schneidwerkzeugs in einer Ebene verbunden ist, die in der Nähe des Schneidwerkzeugs und des Bezugsmittelpunkts verläuft.
  9. Fahrzeugrückleuchte, insbesondere für Kraftfahrzeuge , dadurch gekennzeichnet, daß sie eine Lichtquelle (10), ein Deckglas (40) und eine Zwischenscheibe (30) nach einem der Ansprüche 1 bis 6 umfaßt.
EP91400877A 1990-03-30 1991-03-29 Zwischenscheibe für Fahrzeugrückleuchte und Herstellungsverfahren Expired - Lifetime EP0451039B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004088 1990-03-30
FR909004088A FR2660411B1 (fr) 1990-03-30 1990-03-30 Ecran intermediaire pour un feu de signalisation et procedes de fabrication de moules pour realiser ledit ecran.

Publications (2)

Publication Number Publication Date
EP0451039A1 EP0451039A1 (de) 1991-10-09
EP0451039B1 true EP0451039B1 (de) 1994-11-30

Family

ID=9395282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400877A Expired - Lifetime EP0451039B1 (de) 1990-03-30 1991-03-29 Zwischenscheibe für Fahrzeugrückleuchte und Herstellungsverfahren

Country Status (6)

Country Link
US (1) US5161885A (de)
EP (1) EP0451039B1 (de)
JP (1) JPH05109304A (de)
DE (1) DE69105329T2 (de)
ES (1) ES2067170T3 (de)
FR (1) FR2660411B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2602133Y2 (ja) * 1993-12-22 1999-12-27 株式会社小糸製作所 車輌用標識灯
FR2743405B1 (fr) * 1996-01-10 1998-04-03 Valeo Vision Feu de signalisation a ecran intermediaire de traitement optique et de style, et procede de fabrication de l'ecran intermediaire
DE19851374C2 (de) * 1998-11-07 2001-06-21 Reitter & Schefenacker Gmbh Leuchtenoptik für eine Kraftfahrzeugleuchte
US7270445B2 (en) * 2003-07-03 2007-09-18 David Munson Apparatus and method for safe illumination of fine art works
US6916107B2 (en) * 2003-07-03 2005-07-12 David Munson Apparatus and method for safe illumination of fine art works
KR100766468B1 (ko) * 2006-03-29 2007-10-12 에이피엘시스템(주) 조명기구용 광 확산렌즈
JP5262611B2 (ja) * 2008-11-18 2013-08-14 スタンレー電気株式会社 レンズ、及び、灯具
CN106772718B (zh) * 2017-01-16 2018-11-02 广州弥德科技有限公司 菲涅尔透镜及具有该菲涅尔透镜的显示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787443A (en) * 1928-03-07 1931-01-06 Gen Motors Res Corp Stop and back-up lamp
US3798444A (en) * 1973-04-05 1974-03-19 Dominion Auto Access Lamp construction
FR2608733B1 (fr) * 1986-12-23 1991-08-09 Cibie Projecteurs Feu de signalisation de faible profondeur pour vehicule automobile
US4972302A (en) * 1988-07-18 1990-11-20 Stanley Electric Co., Ltd. Vehicle lamp having inner lens and reflector

Also Published As

Publication number Publication date
EP0451039A1 (de) 1991-10-09
FR2660411B1 (fr) 1994-09-02
JPH05109304A (ja) 1993-04-30
DE69105329T2 (de) 1995-04-13
ES2067170T3 (es) 1995-03-16
DE69105329D1 (de) 1995-01-12
US5161885A (en) 1992-11-10
FR2660411A1 (fr) 1991-10-04

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