EP3030831B1 - Kfz-projektionsscheinwerfer mit einer beweglichen blende - Google Patents

Kfz-projektionsscheinwerfer mit einer beweglichen blende Download PDF

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Publication number
EP3030831B1
EP3030831B1 EP14756093.2A EP14756093A EP3030831B1 EP 3030831 B1 EP3030831 B1 EP 3030831B1 EP 14756093 A EP14756093 A EP 14756093A EP 3030831 B1 EP3030831 B1 EP 3030831B1
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EP
European Patent Office
Prior art keywords
cut
bar
transmission shaft
groove
motor
Prior art date
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Active
Application number
EP14756093.2A
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English (en)
French (fr)
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EP3030831A1 (de
Inventor
Alexandre Aubry
Cyril Rivier
Hassan Koulouh
Daniel Lopez
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AML Systems SAS
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AML Systems SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/698—Shaft-shaped screens rotating along its longitudinal axis

Definitions

  • the invention relates to a light beam cut-off mechanism for an optical module and said optical module. It applies in particular to an optical module intended to be inserted into a motor vehicle headlight, in particular an elliptical headlight, installed at the front of the motor vehicle.
  • Such optical modules have a light source which projects light onto a reflector. The light is then reflected off a lens to be knocked down and reflected back as a beam of light outside the vehicle.
  • Document EP 2169299 A1 discloses such an optical module.
  • the invention is more particularly interested in optical modules comprising a rotary cut-off strip, electrically actuated to move, on command, from a first angular position, in which it obscures a part of the light beam in order to limit the range of the projector. to that of the code lights so as not to dazzle other drivers traveling in the opposite direction, to a second angular position, in which it does not obscure the light beam, the range of the headlight then corresponding to that of the main beam.
  • the cut-off bar is electrically actuated by a motor in order to drive it in rotation.
  • the motor comprises a transmission shaft driving a gear mechanism in rotation so as to transmit its rotational movement to the cut-off bar.
  • Activation of the engine makes it possible to drive the cut-off bar from its first position corresponding to the code lights to a stop maintaining the cut-off bar in its second position corresponding to the high beams.
  • the motor is then kept activated so that the transmission, through the gear mechanism, maintains the cut-off bar in this position.
  • the motor When you want to reposition the cut-off bar in its first position, the motor is deactivated. Its transmission shaft is then free to rotate so that it no longer retains the cut-off bar. It is then driven by means of a return spring to a stop defining its first position. During this rotation, it is the cut-off bar which drives the transmission shaft in rotation by means of the gear mechanism.
  • the invention aims to improve the situation. It thus relates to an optical module cut-off mechanism comprising a cut-off bar, a motor driving the cut-off bar between at least a first and a second position via a transmission shaft of the motor and a means of 'drive of the cut-off bar linked to the transmission shaft, a return means tending to return the cut-off bar to its first position, characterized in that the drive means comprises a device for decoupling the movement of the 'transmission shaft relative to that of the cut-off bar when the cut-off bar reaches the first position.
  • said decoupling device comprises one or more means for damping the movement of the transmission shaft once the cut-off bar has reached the first position.
  • the movement of the transmission shaft is thus dampened more than by its simple friction, which has the consequence of reducing the rebounds undergone by the cut-off bar. Damping is done, for example, by the friction of one part on another.
  • the decoupling device comprises a first part integral with the transmission shaft and a second part driving the cut-off bar in rotation, the first part being driven by the second part when the bar of cut passes from the second position to the first position, said first part decoupling from the second part when the cut strip reaches the first position.
  • the second part dampens the movement of the first part when the cut-off bar reaches the first position.
  • the damping means is advantageously constituted by the friction between the second part and the first part.
  • the second part comprises a set of teeth forming a gear with said cut-off bar.
  • the first and second parts are linked so as to allow angular movement of the first part relative to the second part along an axis of rotation of the transmission shaft.
  • the angular movement thus allows the movement of the first part to be decoupled from that of the second part when the cut-off bar reaches its first position.
  • the second part comprises a groove in the form of an angular sector and the first part comprises a rib moving in said groove so as to allow said angular movement.
  • the damping means consists of the friction between the rib and the groove.
  • the first part has the shape of a cylinder located at a distal end of the transmission shaft, said rib being located at the periphery of the cylinder.
  • the first part is located at the center of the second part, said groove in the form of an angular sector being located at the periphery of said first part.
  • the decoupling device in the form of a conventional gear cylinder comprising the first part in its central part and the second part in its peripheral part. It can thus be integrated into existing cut-off mechanisms without the need for modification of the cut-off mechanism.
  • the invention also relates to an optical module comprising a cut-off mechanism as described above.
  • the figure 1 illustrates an optical module 1 comprising a cut-off mechanism 5 according to the invention.
  • Such an optical module comprises a light source 2 producing a light beam reflected by an optical reflector 3. The light beam is then projected onto a lens 4 which reverses it and sends it back onto the road located in front of the vehicle in which the optical module is mounted. .
  • the lens 4 is arranged on a lens holder 7.
  • the light source here is a halogen lamp.
  • the cut-off mechanism 5 is arranged between the reflector 3 and the lens 4. This cut-off mechanism 5 makes it possible to more or less block the light beam, in reaction to a command from the user of the vehicle or to an automatic command, in order to to offer different ways of lighting the road.
  • the cut-off mechanism 5 comprises a cut-off bar 10.
  • This is a dual-function cut-off mechanism, that is to say that the cut-off bar can be positioned in two positions, a first position in which it partially blocks the light beam and corresponding to the code light and a second position in which it does not or less block the light beam and corresponding to the main beam. In its first position, the cut-off bar 10 extends in a substantially vertical plane, while in its second position it extends in a substantially horizontal plane.
  • the cut-off bar 10 is positioned opposite the light source. It is mounted on a bar support 11 comprising a first part 12 having a gear 14, located at a first longitudinal end 72 of the bar 10.
  • the first part is here in the form of a disc sector and comprises a central part 21 at the periphery of which the gear 14 is located.
  • the support 11 of the bar also comprises a second part 13 having a return means, in particular a return spring 15, tending to bring back the bar 10 in the first position, that is to say in its substantially vertical position, the second part 13 being located at a second longitudinal end 73 of the bar 10.
  • the first longitudinal end 72 is located to the left of bar 10 on the figure 2 while the second longitudinal end 73 is located to the right of the bar 10.
  • the bar 10 is here made of steel. It is of substantially rectangular shape and designed to more or less block the light beam as explained above, that is to say to cut the light beam more or less.
  • the bar support 11 is mounted on a frame 50 of the cut-off mechanism 5.
  • the cut-off mechanism 5 also comprises a drive means 90 comprising in particular the first part 12 of the support 11 and a pinion provided with teeth, actuated by a DC motor 30.
  • the drive means 90 is connected to a drive shaft 38 of the DC motor 30 so as to drive the cut-off bar.
  • the motor 30 is of substantially parallelepipedal shape so that it comprises an upper face 32, a front face 33, a lower face 34, a rear face 35, a left face 36 and a right face 37.
  • the upper face 32 and the lower face 34, opposite to each other, are of curved shapes.
  • the drive means 90 At the level of the left face 36 of the motor 30 is located the drive means 90. It is connected to the transmission shaft 38, projecting relative to the left face 36 of the motor 30 and situated substantially in the middle of the face. left 36 of engine 30.
  • the motor 30 is mounted on a motor support 40 located in the center and towards the front of the frame 50, that is to say between the motor and the lens, once the cut-off mechanism 5 is mounted in the optical module. .
  • the cut-off mechanism 5 also comprises a heat shield 60 conforming to an outer face of the support 40 of the motor 30 facing forward.
  • the heat shield 60 is thus located between the motor support 40 and the lens. It is made of metal so that it protects the motor mount 40 and the motor 30 from sunlight.
  • the central part 21 of the first part 12 of the support 11 comprises a light (not visible) cooperating with a boss 61 of the cut-off mechanism 5 located on the frame 50.
  • the freedom of movement of the boss 61 in the light defines the rotation that must make the cut-off bar between its first position and its second position.
  • the light defines a first stop against which the boss 61 abuts when the cut-off bar is in its first position and a second stop against which the boss 61 abuts when the cut-off bar is in its second position.
  • the motor 30 drives the cut-off bar via its drive means 90 and the transmission shaft 38 from its first position to its second position, here tilting the cut-off bar forward.
  • the engine remains activated so that its transmission shaft 38 maintains the cut-off bar 10 in this position. position via the drive means 90.
  • the drive means 90 comprises a device 81 for decoupling the movement of the transmission shaft 38 relative to that of the cut-off bar 10 when the cut-off bar 10 reaches the first position.
  • the decoupling device 81 is described in more detail on the figures 4 to 6 .
  • the first part part 82 comprises a ring 91, located at its base, that is to say of its part located closest to the engine.
  • the ring 91 is of greater diameter than the cylindrical shape of the first part 82.
  • the first part 82 may be located at a distal end of the transmission shaft 38. It comprises a rib 87 which extends radially. at the periphery of the cylinder.
  • the decoupling device also comprises a second part 83 which is substantially cylindrical and driving the cut-off bar.
  • the second part 83 drives the cut-off bar by means of the first part 12 of the bar support comprising the gear.
  • the second part 83 is here a pinion comprising a toothing 89.
  • the second part 83 can thus mesh with the gear of the first part in order to drive the cut-off bar.
  • the second part comprises a central opening, coaxial with the transmission shaft.
  • the second part 83 comprises a groove 84 which is inserted radially, from the central opening outwards, into the thickness of the pinion.
  • the groove 84 is here in the form of an angular sector. It extends between a first end 85 located on the left of the figure 4 and a second end 86 located on the right of the figure 4 .
  • the first room is located here in the center of the second room 83.
  • the groove 84 is located around the first part 82, in particular at the periphery of the latter.
  • the central opening of the second part 83 receives the first part 82 and it is the groove 84 which accommodates the rib 87.
  • the first part 82 is thus inserted into the second part 83 so that the ring 91 is in contact with the second part 83.
  • the decoupling device 81 has the shape of a conventional pinion and can be positioned on a transmission shaft of the prior art without requiring particular adaptation of the transmission shaft 38.
  • the groove 84 is located at the periphery of the first part 82. It allows the first part 82 to rotate around the axis of the transmission shaft, inside the angular sector that it defines without the second part 83 does not turn. It is understood here that the first part 82 and the second part 83 are linked so as to allow angular displacement of the first part 82 relative to the second part 83 along an axis of rotation of the transmission shaft 38.
  • the movement of the first part 82 in the groove 84 is thus decoupled from the movement of the second part 83.
  • the motor 30 drives the cut-off bar 10 from the first to the second position, its transmission shaft 38 turns here. clockwise on the figure 4 so that the rib 87 presses on the second end 86 of the groove 84 and thus drives the second part 83 in rotation which in turn drives the cut-off bar via the gear.
  • the return spring 15 presses, via the first part 13, against the cut-off bar 10 which then drives the gear 14 which in turn drives the second part 83 in a rotation in counterclockwise on the figure 4 .
  • the latter then drives the first part 82, the rib 87 of which is in abutment against the second end 86 of the groove 84.
  • the first stop arrives against the boss i.e. when the cut-off bar arrives in its first position, it stops rotating, which has the consequence of stopping the rotation of the gear and therefore of the second part 83.
  • the transmission shaft 38 however continues its rotation due to its inertia, the groove 84 then allowing the displacement of the rib 87 and therefore of the first part 82 linked to the transmission shaft 38. The result is thus, over the extent of the groove, a decoupling of the movement of the transmission shaft 38 relative to that of the cut-off bar when the latter reaches its first position.
  • the rib 87 travels the path defined by the groove 84 until it comes into abutment against the first end 85 of the groove 84.
  • the transmission shaft being subjected to internal friction in the engine, it thus loses speed during its rotation. corresponding to the angular sector defined by the groove. Its momentum will thus be reduced so that the rebounds to which the cut-off bar is subjected will be reduced.
  • the decoupling device 81 may also include one or more damping means so that the movement of the transmission shaft is further braked and its speed is further reduced when the rib 87 arrives at the first end 85 of the groove 84.
  • damping means here comprise the first part 82 and the second part 83 and in particular consist of friction between the first part 82 and the second part 83, in particular between the rib 87 and the bottom of the groove 84. Frictions between the first part 82 and the second part 83 other than those made between the rib 87 and the groove 84 can also dampen the movement of the transmission shaft 38.

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

Claims (11)

  1. Trennmechanismus (5) für ein optisches Modul (1), umfassend eine Trennleiste (10), einen Motor (30), der die Trennleiste (10) mittels einer Antriebswelle (38) des Motors (30) und eines mit der Antriebswelle (38) verbundenen Mittels zum Antrieb (90) der Trennleiste (10) zwischen mindestens einer ersten und einer zweiten Position antreibt, ein Rückstellmittel (15), das dazu neigt, die Trennleiste (10) in ihre erste Position zurückzubringen, dadurch gekennzeichnet, dass das Antriebsmittel (90) eine Vorrichtung zum Entkoppeln (81) der Bewegung der Antriebswelle (38) von derjenigen der Trennleiste (10) umfasst, wenn die Trennleiste (10) die erste Position erreicht.
  2. Trennmechanismus (5) nach Anspruch 1, wobei die Entkopplungsvorrichtung (81) ein Mittel oder Mittel zum Dämpfen der Bewegung der Antriebswelle (38) umfasst, sobald die Trennleiste (10) die erste Position erreicht hat.
  3. Trennmechanismus (5) nach Anspruch 1 oder 2, wobei die Entkopplungsvorrichtung (81) ein erstes Teil (82), das fest mit der Antriebswelle (38) verbunden ist, und ein zweites Teil (83), das die Trennleiste (10) in Drehung antreibt, umfasst, wobei das erste Teil (82) durch das zweite Teil (83) angetrieben wird, wenn die Trennleiste von der zweiten Position in die erste Position übergeht, wobei das erste Teil (82) von der Bewegung des zweiten Teils (83) entkoppelt wird, wenn die Trennleiste (10) die erste Position erreicht.
  4. Trennmechanismus (5) nach Anspruch 3, wobei das zweite Teil (83) die Bewegung des ersten Teils (82) dämpft, wenn die Trennleiste (10) die erste Position erreicht.
  5. Trennmechanismus (5) nach Anspruch 3 oder 4, wobei das zweite Teil (83) eine Verzahnung (89) umfasst, die mit der Trennleiste (10) einen Zahneingriff erzeugt.
  6. Trennmechanismus (10) nach einem der Ansprüche 3 bis 5, wobei das erste und das zweite Teil (82, 83) so miteinander verbunden sind, dass sie einen Winkelausschlag des ersten Teils (82) in Bezug auf das zweite Teil (83) entlang einer Rotationsachse der Antriebswelle (38) ermöglichen.
  7. Trennmechanismus (5) nach Anspruch 6, wobei das zweite Teil (83) eine Nut (84) in Form eines Winkelsektors umfasst und das erste Teil (82) eine Rippe (87) umfasst, die sich in der Nut (84) so bewegt, dass sie den Winkelausschlag ermöglicht.
  8. Trennmechanismus (5) nach Anspruch 2 in Verbindung mit Anspruch 7, wobei das Dämpfungsmittel durch die Reibung zwischen der Rippe (87) und der Nut (84) gebildet wird.
  9. Trennmechanismus (5) nach Anspruch 7 oder 8, wobei das erste Teil (82) in Form eines Zylinders vorliegt, der an einem distalen Ende der Antriebswelle (38) angeordnet ist, wobei die Rippe (87) am Umfang des Zylinders angeordnet ist.
  10. Trennmechanismus (5) nach einem der Ansprüche 7 bis 9, wobei das erste Teil (82) in der Mitte des zweiten Teils (83) angeordnet ist, wobei die Nut (84) in der Form eines Winkelsektors am Umfang des Teils (83) angeordnet ist.
  11. Optisches Modul (1), umfassend einen Trennmechanismus (5) nach einem der vorstehenden Ansprüche.
EP14756093.2A 2013-08-06 2014-08-05 Kfz-projektionsscheinwerfer mit einer beweglichen blende Active EP3030831B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1357839A FR3009602B1 (fr) 2013-08-06 2013-08-06 Mecanisme de coupure de faisceau lumineux pour module optique et le module optique
PCT/FR2014/052038 WO2015019021A1 (fr) 2013-08-06 2014-08-05 Mécanisme de coupure de faisceau lumineux pour module optique et le module optique

Publications (2)

Publication Number Publication Date
EP3030831A1 EP3030831A1 (de) 2016-06-15
EP3030831B1 true EP3030831B1 (de) 2021-02-24

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ID=49510337

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Application Number Title Priority Date Filing Date
EP14756093.2A Active EP3030831B1 (de) 2013-08-06 2014-08-05 Kfz-projektionsscheinwerfer mit einer beweglichen blende

Country Status (4)

Country Link
EP (1) EP3030831B1 (de)
CN (1) CN105452761B (de)
FR (1) FR3009602B1 (de)
WO (1) WO2015019021A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2895783B1 (fr) * 2006-01-05 2008-02-01 Valeo Vision Sa Projecteur de lumiere a trois fonctions pour vehicule automobile
JP4714108B2 (ja) * 2006-08-09 2011-06-29 株式会社小糸製作所 車両用赤外光照射ランプ
FR2936591B1 (fr) * 2008-09-30 2014-09-12 Valeo Vision Sas Module optique pour vehicule automobile apte a eclairer selectivement une zone
DE202009009519U1 (de) * 2009-07-07 2009-09-17 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugscheinwerfer mit einer Zusatzblende
DE202011005617U1 (de) * 2011-04-27 2011-06-27 Automotive Lighting Reutlingen GmbH, 72762 Lichtmodul eines Kraftfahrzeugscheinwerfers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2015019021A1 (fr) 2015-02-12
FR3009602B1 (fr) 2015-08-28
CN105452761B (zh) 2018-08-31
EP3030831A1 (de) 2016-06-15
CN105452761A (zh) 2016-03-30
FR3009602A1 (fr) 2015-02-13

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