EP3030831A1 - Mechanism for cutting off a light beam for an optical module and said optical module - Google Patents

Mechanism for cutting off a light beam for an optical module and said optical module

Info

Publication number
EP3030831A1
EP3030831A1 EP14756093.2A EP14756093A EP3030831A1 EP 3030831 A1 EP3030831 A1 EP 3030831A1 EP 14756093 A EP14756093 A EP 14756093A EP 3030831 A1 EP3030831 A1 EP 3030831A1
Authority
EP
European Patent Office
Prior art keywords
piece
bar
cut
cutoff
transmission shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14756093.2A
Other languages
German (de)
French (fr)
Other versions
EP3030831B1 (en
Inventor
Alexandre Aubry
Cyril Rivier
Hassan Koulouh
Daniel Lopez
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.)
AML Systems SAS
Original Assignee
AML Systems 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 AML Systems SAS filed Critical AML Systems SAS
Publication of EP3030831A1 publication Critical patent/EP3030831A1/en
Application granted granted Critical
Publication of EP3030831B1 publication Critical patent/EP3030831B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21S41/60—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 cutting mechanism for optical module and optical module. It applies in particular to an optical module intended to fit into an automotive projector, in particular an elliptical projector, installed at the front of the motor vehicle.
  • Such optical modules have a light source that projects light onto a reflector. The light is then reflected on a lens to be reversed and returned as a light beam outside the vehicle.
  • the invention is more particularly concerned with optical modules comprising a rotary cut-off bar, electrically actuated to move, on command, a first angular position, in which it obscures part of the light beam in order to limit the scope of the projector to that of the code lights so as not to dazzle other drivers traveling in opposite directions, to a second angular position, in which it does not obscure the light beam, the range of the projector then corresponding to that of high beam.
  • the cutoff bar is electrically driven by a motor to drive it in rotation.
  • the motor comprises for this purpose a transmission shaft rotating a gear mechanism so as to transmit to the cut bar its rotational movement.
  • Activation of the motor drives the cutoff bar from its first position corresponding to the code lights to a stop holding the cutoff bar in its second position corresponding to high beam.
  • the motor is then kept activated so that the transmission, through the gear mechanism, hold the cut-off bar in this position.
  • the motor When it is desired to reposition the cutoff bar in its first position, the motor is deactivated. Its transmission shaft is then free to rotate so that it no longer retains the cutoff bar. It is then driven via a return spring to a stop defining its first position. During this rotation, it is the cutoff bar which drives the transmission shaft in rotation through the gear mechanism.
  • the cutoff bar quickly passes from its second to its first position to limit the transition time between the high beam and the code lights.
  • the return force that the spring exerts on the bar is therefore important and when the cutoff bar comes against the stop defining its first position, it is thus subject to rebounds.
  • These rebounds are further amplified by the inertia of the transmission shaft, driven with the bar as seen above, and the rotor of the motor to which the transmission shaft is connected. These rebounds may be perceptible by the driver and result in a degradation of the code function until the cutoff bar is stabilized.
  • the invention aims to improve the situation. It thus relates to an optical module breaking mechanism comprising a cut-off bar, a motor driving the cut-off bar between at least a first and a second position via an engine transmission shaft and a d driving the cut-off bar connected 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 cutoff bar when the cutoff bar reaches the first position.
  • the decoupling device at the moment when the cut-off bar comes into contact with a first stop defining the first position of the cut-off bar, its rotational movement stops while that of the drive shaft continues.
  • the rebounds of the cutoff bar are then greatly reduced since it is not subject, at this time, to the inertia of the drive shaft and that its own inertia is very low.
  • the transmission shaft will be slowed especially because of the internal characteristics of the engine, for example by friction, and when the cutoff bar and the transmission shaft will be coupled again, the rotational speed of the drive shaft and therefore its kinetic moment will be reduced.
  • said decoupling device comprises one or more damping means of the movement of the transmission shaft once the breaking bar has reached the first position.
  • the movement of the propeller shaft is thus damped more than by its simple friction which has the effect of reducing rebounds suffered by the cutoff bar.
  • the damping is done, for example, by the friction of one piece on another.
  • the decoupling device comprises a first integral part of the transmission shaft and a second part driving the rotating cut bar, the first part being driven by the second part when the bar of cutoff passes from the second position to the first position, said first piece decoupling from the second piece when the cutoff bar reaches the first position.
  • the second piece damps the movement of the first piece when the cutoff bar reaches the first position.
  • the damping means is advantageously constituted by the friction between the second piece and the first piece.
  • the second part comprises a toothing making a gear with said cutoff bar.
  • the first and second parts are connected so as to allow an angular displacement of the first part relative to the second part along an axis of rotation of the transmission shaft.
  • the angular displacement thus allows the decoupling of the movement of the first piece relative to that of the second piece when the cutoff bar reaches its first position.
  • the second part comprises a groove in the form of angular sector and the first part comprises a rib moving in said groove so as to allow said angular deflection.
  • the damping means is constituted by the friction between the rib and the groove.
  • the first piece 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 piece is located in the center of the second piece, said groove in the form of angular sector being located at the periphery of said first piece.
  • 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. In this way it can 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 cutoff mechanism as described above.
  • the invention will be better understood in the light of the following description which is given only as an indication and which is not intended to limit it, accompanied by the appended drawings among which:
  • FIG. 1 is a schematic view of an optical module with a cut-off mechanism
  • FIG. 2 is an exploded perspective view of the breaking mechanism of the invention
  • FIG. 3 is a perspective view of the cut-off mechanism illustrated in FIG. 2, once assembled;
  • FIG. 4 is a side view of the cut-off mechanism illustrated in FIG. 3;
  • FIG. 5 is a perspective view of a motor of the cut-off mechanism provided with a decoupling device according to the invention.
  • FIG. 6 is an exploded perspective view of the motor and the decoupling device of FIG. 5.
  • FIG. 1 illustrates an optical module 1 comprising a cutoff 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 returns it to the road in front of the vehicle in which the optical module is mounted .
  • the lens 4 is disposed on a lens holder 7.
  • the light source is here 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 close the light beam, in response to a command from the user of the vehicle or to an automatic command, in order to to propose different modes of lighting of the road.
  • the cut-off mechanism 5 comprises a cut-off bar 10.
  • This is a bi-function breaking mechanism, that is to say that the cut-off bar can be positioned in two positions, a first position in which it partially closes the light beam and corresponding to the code light and a second position in which it does not close or less light beam and corresponding to the high beam. In its first position, the cutoff bar 10 extends in a substantially vertical plane while in its second position it extends in a substantially horizontal plane.
  • the cutoff bar 10 is positioned in front of the light source. It is mounted on a support 1 1 of bar comprising a first portion 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 sector disk and comprises a central portion 21 at the periphery of which is the gear 14.
  • the support 1 1 of the bar also comprises a second portion 13 having a return means, in particular a return spring 15, tending to bring the bar 10 in the first position, that is to say in its substantially vertical position, the second portion 13 being located at a second longitudinal end 73 of the bar 10.
  • the first longitudinal end 72 is located to the left of the bar 10 in 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 arranged to more or less close the light beam as explained above, that is to say to cut more or less the light beam.
  • the support 1 1 bar is mounted on a frame 50 of the cut-off mechanism 5.
  • the cut-off mechanism 5 also comprises a drive means 90 including in particular the first portion 12 of the support January 1 and a pinion with a toothing,
  • 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 straight face 37.
  • the upper face 32 and the lower face 34, opposite each other are of curved shapes.
  • the drive means 90 At the left face 36 of the motor 30 is the drive means 90. It is connected to the transmission shaft 38, projecting from the left face 36 of the motor 30 and located substantially in the middle of the face left 36 of the engine 30.
  • the motor 30 is mounted on a motor support 40 located in the center and towards the front of the armature 50, that is to say between the motor and lens, once the cut-off mechanism 5 is mounted in the optical module. .
  • the cut-off mechanism 5 also comprises a heat shield 60 matching an outer face of the support 40 of the motor 30 directed towards the front.
  • the heat shield 60 is thus located between the engine support 40 and the lens. It is made of metal so that it protects the motor mount 40 and the motor 30 from the sun's rays.
  • the central portion 21 of the first portion 12 of the support January 1 comprises a light (not visible) cooperating with a boss 61 of the cutoff mechanism 5 located on the armature 50. The freedom of movement of the boss 61 in the light defines the rotation the cutoff bar must be between its first position and its second position.
  • the light defines a first stop against which the boss 61 abuts when the cutoff bar is in its first position and a second stop against which the boss 61 abuts when the cutoff bar is in its second position.
  • the motor 30 drives the cutoff bar through its drive means 90 and the drive shaft 38 from its first position to its second position by switching the cutoff bar forward. As long as it is desired to maintain the cut-off bar 10 in the high beam position, that is to say in its second position, the motor 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 decoupling device 81 of the movement of the transmission shaft 38 relative to that of the cutoff bar 10 when the cutoff bar 10 reaches the first position.
  • the decoupling device 81 is described in greater detail in FIGS. 4 to 6. It will be noted in these figures that it comprises a first substantially cylindrical piece coaxial and connected to the transmission shaft 38, ie that is to say that the first piece is integral with the transmission shaft 38.
  • the first piece 82 comprises a ring 91 located at its base, that is to say, its part located closest to the engine.
  • the ring 91 has a larger diameter than the cylindrical shape of the first piece 82.
  • the first piece 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 substantially cylindrical part 83 and driving the cut-off bar.
  • the second part 83 drives the cut-off bar via the first part 12 of the bar support comprising the gear.
  • the second piece 83 is here a pinion comprising a set of teeth 89.
  • the second piece 83 can thus mesh with the gear of the first part in order to drive the cutoff bar.
  • the second part comprises a central opening, coaxial with the drive shaft.
  • the second piece 83 comprises a groove 84 penetrating radially, from the central opening to the outside, in the thickness of the pinion.
  • the groove 84 is here in the form of angular sector. It extends between a first end 85 situated on the left of FIG. 4 and a second end 86 located on the right of FIG. 4.
  • the first piece is located here in the center of the second piece 83.
  • groove 84 is located around the first piece 82, especially at the periphery thereof.
  • the central opening of the second piece 83 accommodates the first piece 82 and it is the groove 84 which receives the rib 87.
  • the first piece 82 is thus inserted into the second piece 83 so that the ring 91 is in contact with the second piece 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 special adaptation of the transmission shaft 38.
  • the groove 84 is located at the periphery of the first piece 82. It allows the first piece 82 to rotate about the axis of the transmission shaft, within the angular sector that it defines without the second piece 83 does not turn. It will be understood that the first piece 82 and the second piece 83 are connected so as to allow an angular displacement of the first piece 82 relative to the second piece 83 along an axis of rotation of the transmission shaft 38. the first piece 82 in the groove 84 is thus uncoupled from the movement of the second piece 83. Indeed, when the motor 30 drives the cut-off bar 10 from the first to the second position, its transmission shaft 38 turns here in the direction clockwise in FIG.
  • the transmission shaft 38 however continues its rotation because of its inertia, the groove 84 then allowing the displacement of the rib 87 and thus the first piece 82 connected to the transmission shaft 38. This gives, on the extent of the groove, a decoupling of the movement of the transmission shaft 38 relative to that of the cutoff bar when the latter reaches its first position.
  • the rib 87 traverses the path defined by the groove 84 to abut against the first end 85 of the groove 84.
  • the transmission shaft being subjected to friction internal to the engine, it loses speed during its rotation. corresponding to the angular sector defined by the groove. Its momentum will thus be reduced so that the bounces to which the cut-off bar is subjected will be reduced.
  • the decoupling device 81 may also comprise 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 reaches the first end 85 of the groove 84.
  • damping means here comprise the first piece 82 and the second piece 83 and consist in particular of friction between the first piece 82 and the second piece 83, in particular between the rib 87 and the bottom of the groove 84. Frictions between the first piece 82 and the second piece 83 other than those made between the rib 87 and the groove 84 can also dampen the movement of the transmission shaft 38.

Landscapes

  • 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)

Abstract

The invention concerns a cutoff mechanism (5) of an optical module comprising a cutoff bar (10), a motor (30) driving the cutoff bar (10) between at least first and second positions via a transmission shaft (38) of the motor (30) and a driving means for driving the cutoff bar (10) linked to the transmission shaft (38), a return means (15) that tends to return the cutoff bar (10) to the first position of same, characterised by the fact that the driving means comprises a device (81) for decoupling the movement of the transmission shaft (38) relative to that of the cutoff bar (10) when the cutoff bar (10) reaches the first position. The invention also concerns an optical module comprising such a cutoff mechanism (5).

Description

Mécanisme de coupure de faisceau lumineux pour module optique et le module optique  Beam-breaking mechanism for optical module and optical module
L'invention concerne un mécanisme de coupure de faisceau lumineux pour module optique et ledit module optique. Elle s'applique notamment à un module optique destiné à s'insérer dans un projecteur automobile, en particulier un projecteur elliptique, installé à l'avant du véhicule automobile. The invention relates to a light beam cutting mechanism for optical module and optical module. It applies in particular to an optical module intended to fit into an automotive projector, in particular an elliptical projector, installed at the front of the motor vehicle.
De tels modules optiques possèdent une source lumineuse qui projette de la lumière sur un réflecteur. La lumière est ensuite réfléchie sur une lentille afin d'être renversée et renvoyée sous forme d'un faisceau lumineux à l'extérieur du véhicule. Such optical modules have a light source that projects light onto a reflector. The light is then reflected on a lens to be reversed and returned as a light beam outside the vehicle.
L'invention s'intéresse plus particulièrement aux modules optiques comprenant une barrette de coupure rotative, actionnée électriquement pour se déplacer, sur commande, d'une première position angulaire, dans laquelle elle occulte une partie du faisceau lumineux afin de limiter la portée du projecteur à celle des feux de code pour ne pas éblouir les autres conducteurs circulant en sens inverse, à une deuxième position angulaire, dans laquelle elle n'occulte pas le faisceau lumineux, la portée du projecteur correspondant alors à celle des feux de route. The invention is more particularly concerned with optical modules comprising a rotary cut-off bar, electrically actuated to move, on command, a first angular position, in which it obscures part of the light beam in order to limit the scope of the projector to that of the code lights so as not to dazzle other drivers traveling in opposite directions, to a second angular position, in which it does not obscure the light beam, the range of the projector then corresponding to that of high beam.
La barrette de coupure est actionnée électriquement par un moteur afin de l'entraîner en rotation. Le moteur comprend pour cela un arbre de transmission entraînant en rotation un mécanisme d'engrenage de manière à transmettre à la barrette de coupure son mouvement de rotation. The cutoff bar is electrically driven by a motor to drive it in rotation. The motor comprises for this purpose a transmission shaft rotating a gear mechanism so as to transmit to the cut bar its rotational movement.
L'activation du moteur permet d'entraîner la barrette de coupure depuis sa première position correspondant aux feux de code jusqu'à une butée maintenant la barrette de coupure dans sa deuxième position correspondant aux feux de route. Le moteur est alors maintenu activé pour que l'arbre de transmission, par l'intermédiaire du mécanisme d'engrenage, maintienne la barrette de coupure dans cette position. Activation of the motor drives the cutoff bar from its first position corresponding to the code lights to a stop holding the cutoff bar in its second position corresponding to high beam. The motor is then kept activated so that the transmission, through the gear mechanism, hold the cut-off bar in this position.
Lorsque l'on souhaite repositionner la barrette de coupure dans sa première position, le moteur est désactivé. Son arbre de transmission est alors libre en rotation de sorte qu'il ne retient plus la barrette de coupure. Elle est alors entraînée par l'intermédiaire d'un ressort de rappel jusqu'à une butée définissant sa première position. Pendant cette rotation, c'est la barrette de coupure qui entraine l'arbre de transmission en rotation par l'intermédiaire du mécanisme d'engrenage. When it is desired to reposition the cutoff bar in its first position, the motor is deactivated. Its transmission shaft is then free to rotate so that it no longer retains the cutoff bar. It is then driven via a return spring to a stop defining its first position. During this rotation, it is the cutoff bar which drives the transmission shaft in rotation through the gear mechanism.
Or, il est nécessaire que la barrette de coupure passe rapidement de sa deuxième à sa première position afin de limiter le temps de transition entre les feux de route et les feux de codes. La force de rappel que le ressort exerce sur la barrette est donc importante et lorsque la barrette de coupure arrive contre la butée définissant sa première position, elle est ainsi soumise à des rebonds. Ces rebonds sont en outre amplifiés par l'inertie de l'arbre de transmission, entraîné avec la barrette comme vu précédemment, et du rotor du moteur auquel l'arbre de transmission est relié. Ces rebonds peuvent être perceptibles par le conducteur et ont pour conséquence une dégradation de la fonction code tant que la barrette de coupure n'est pas stabilisée. However, it is necessary that the cutoff bar quickly passes from its second to its first position to limit the transition time between the high beam and the code lights. The return force that the spring exerts on the bar is therefore important and when the cutoff bar comes against the stop defining its first position, it is thus subject to rebounds. These rebounds are further amplified by the inertia of the transmission shaft, driven with the bar as seen above, and the rotor of the motor to which the transmission shaft is connected. These rebounds may be perceptible by the driver and result in a degradation of the code function until the cutoff bar is stabilized.
L'invention vise à améliorer la situation. Elle concerne ainsi un mécanisme de coupure de module optique comprenant une barrette de coupure, un moteur entraînant la barrette de coupure entre au moins une première et une deuxième position par l'intermédiaire d'un arbre de transmission du moteur et d'un moyen d'entraînement de la barrette de coupure lié à l'arbre de transmission, un moyen de rappel tendant à ramener la barrette de coupure dans sa première position, caractérisé par le fait que le moyen d'entraînement comprend un dispositif de découplage du mouvement de l'arbre de transmission par rapport à celui de la barrette de coupure lorsque la barrette de coupure atteint la première position. Ainsi, grâce à l'invention et en particulier au dispositif de découplage, au moment où la barrette de coupure entre en contact avec une première butée définissant la première position de la barrette de coupure, son mouvement de rotation s'arrête alors que celui de l'arbre de transmission continue. Les rebonds de la barrette de coupure sont alors très fortement diminués puisqu'elle n'est pas soumise, à ce moment là, à l'inertie de l'arbre de transmission et que son inertie propre est très faible. L'arbre de transmission sera notamment ralenti du fait des caractéristiques internes du moteur, par exemple par frottement, et lorsque la barrette de coupure et l'arbre de transmission seront de nouveau couplés, la vitesse de rotation de l'arbre de transmission et donc son moment cinétique seront réduits. The invention aims to improve the situation. It thus relates to an optical module breaking mechanism comprising a cut-off bar, a motor driving the cut-off bar between at least a first and a second position via an engine transmission shaft and a d driving the cut-off bar connected 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 cutoff bar when the cutoff bar reaches the first position. Thus, thanks to the invention and in particular to the decoupling device, at the moment when the cut-off bar comes into contact with a first stop defining the first position of the cut-off bar, its rotational movement stops while that of the drive shaft continues. The rebounds of the cutoff bar are then greatly reduced since it is not subject, at this time, to the inertia of the drive shaft and that its own inertia is very low. The transmission shaft will be slowed especially because of the internal characteristics of the engine, for example by friction, and when the cutoff bar and the transmission shaft will be coupled again, the rotational speed of the drive shaft and therefore its kinetic moment will be reduced.
Selon un aspect de l'invention, ledit dispositif de découplage comporte un ou des moyens d'amortissement du mouvement de l'arbre de transmission une fois que la barrette de coupure a atteint la première position. Le mouvement de l'arbre de transmission est ainsi amorti davantage que par ses simple frottements ce qui a pour conséquence de réduire les rebonds subis par la barrette de coupure. L'amortissement se fait, par exemple, par le frottement d'une pièce sur une autre. According to one aspect of the invention, said decoupling device comprises one or more damping means of the movement of the transmission shaft once the breaking bar has reached the first position. The movement of the propeller shaft is thus damped more than by its simple friction which has the effect of reducing rebounds suffered by the cutoff bar. The damping is done, for example, by the friction of one piece on another.
Selon un exemple de réalisation de l'invention, le dispositif de découplage comprend une première pièce solidaire de l'arbre de transmission et une deuxième pièce entraînant la barrette de coupure en rotation, la première pièce étant entraînée par la deuxième pièce quand la barrette de coupure passe de la deuxième position à la première position, ladite première pièce se découplant de la deuxième pièce lorsque la barrette de coupure atteint la première position. Avantageusement, la deuxième pièce amortit le mouvement de la première pièce lorsque la barrette de coupure atteint la première position. Le moyen d'amortissement est de manière avantageuse constitué par le frottement entre la deuxième pièce et la première pièce. De manière avantageuse, la deuxième pièce comprend une denture réalisant un engrenage avec ladite barrette de coupure. According to an exemplary embodiment of the invention, the decoupling device comprises a first integral part of the transmission shaft and a second part driving the rotating cut bar, the first part being driven by the second part when the bar of cutoff passes from the second position to the first position, said first piece decoupling from the second piece when the cutoff bar reaches the first position. Advantageously, the second piece damps the movement of the first piece when the cutoff bar reaches the first position. The damping means is advantageously constituted by the friction between the second piece and the first piece. Advantageously, the second part comprises a toothing making a gear with said cutoff bar.
Selon un aspect de l'invention, la première et la deuxième pièces sont liées de manière à permettre un débattement angulaire de la première pièce par rapport à la deuxième pièce selon un axe de rotation de l'arbre de transmission. Le débattement angulaire autorise ainsi le découplage du mouvement de la première pièce par rapport à celui de la deuxième pièce lorsque la barrette de coupure atteint sa première position. According to one aspect of the invention, the first and second parts are connected so as to allow an angular displacement of the first part relative to the second part along an axis of rotation of the transmission shaft. The angular displacement thus allows the decoupling of the movement of the first piece relative to that of the second piece when the cutoff bar reaches its first position.
Selon un exemple de réalisation de l'invention, la deuxième pièce comprend une rainure en forme de secteur angulaire et la première pièce comprend une nervure se déplaçant dans ladite rainure de manière à autoriser ledit débattement angulaire. According to an exemplary embodiment of the invention, the second part comprises a groove in the form of angular sector and the first part comprises a rib moving in said groove so as to allow said angular deflection.
Selon un aspect de l'invention, le moyen d'amortissement est constitué par le frottement entre la nervure et la rainure. According to one aspect of the invention, the damping means is constituted by the friction between the rib and the groove.
Avantageusement, la première pièce a la forme d'un cylindre situé au niveau d'une extrémité distale de l'arbre de transmission, ladite nervure étant située à la périphérie du cylindre. Advantageously, the first piece 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.
Selon un aspect de l'invention, la première pièce est située au centre de la deuxième pièce, ladite rainure en forme de secteur angulaire étant située à la périphérie de ladite première pièce. Ainsi le dispositif de découplage à la forme d'un cylindre d'engrenage classique comprenant la première pièce dans sa partie centrale et la deuxième pièce dans sa partie périphérique. Il peut de la sorte être intégré aux mécanismes de coupure existants sans besoin de modification du mécanisme de coupure. According to one aspect of the invention, the first piece is located in the center of the second piece, said groove in the form of angular sector being located at the periphery of said first piece. Thus 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. In this way it can be integrated into existing cut-off mechanisms without the need for modification of the cut-off mechanism.
L'invention concerne aussi un module optique comprenant un mécanisme de coupure tel que décrit précédemment. L'invention sera mieux comprise à la lumière de la description suivante qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter, accompagnée des dessins joints parmi lesquels : The invention also relates to an optical module comprising a cutoff mechanism as described above. The invention will be better understood in the light of the following description which is given only as an indication and which is not intended to limit it, accompanied by the appended drawings among which:
- la figure 1 est une vue schématique d'un module optique avec un mécanisme de coupure ; - Figure 1 is a schematic view of an optical module with a cut-off mechanism;
- la figure 2 est une vue en perspective éclatée du mécanisme de coupure de l'invention ; FIG. 2 is an exploded perspective view of the breaking mechanism of the invention;
- la figure 3 est une vue en perspective du mécanisme de coupure illustré à la figure 2, une fois assemblé, - la figure 4 est une vue de coté du mécanisme de coupure illustré à la figure 3, FIG. 3 is a perspective view of the cut-off mechanism illustrated in FIG. 2, once assembled; FIG. 4 is a side view of the cut-off mechanism illustrated in FIG. 3;
- la figure 5 est une vue en perspective d'un moteur du mécanisme de coupure muni d'un dispositif de découplage selon l'invention et FIG. 5 is a perspective view of a motor of the cut-off mechanism provided with a decoupling device according to the invention and
- la figure 6 est une vue en perspective éclatée du moteur et du dispositif de découplage de la figure 5. FIG. 6 is an exploded perspective view of the motor and the decoupling device of FIG. 5.
La figure 1 permet d'illustrer un module optique 1 comprenant un mécanisme de coupure 5 selon l'invention. Un tel module optique comprend une source lumineuse 2 produisant un faisceau lumineux réfléchi par un réflecteur optique 3. Le faisceau lumineux est alors projeté sur une lentille 4 qui le renverse et le renvoie sur la route située devant le véhicule dans lequel le module optique est monté. La lentille 4 est disposée sur un porte lentille 7. La source lumineuse est ici une lampe à halogène. Le mécanisme de coupure 5 est disposé entre le réflecteur 3 et la lentille 4. Ce mécanisme de coupure 5 permet d'obturer plus ou moins le faisceau lumineux, en réaction à une commande de l'utilisateur du véhicule ou à une commande automatique, afin de proposer différents modes d'éclairages de la route. FIG. 1 illustrates an optical module 1 comprising a cutoff 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 returns it to the road in front of the vehicle in which the optical module is mounted . The lens 4 is disposed on a lens holder 7. The light source is here 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 close the light beam, in response to a command from the user of the vehicle or to an automatic command, in order to to propose different modes of lighting of the road.
Ce mécanisme de coupure 5 va maintenant être décrit plus en détail grâce aux figures 2 et 3. Dans la suite de la description, les qualifications avant, arrière, droite, gauche, supérieure et inférieure sont définies par rapport au sens de marche avant du véhicule, c'est-à-dire par rapport au sens de la flèche référencée 80 sur la figure 2. This cut-off mechanism 5 will now be described in greater detail by means of FIGS. 2 and 3. In the remainder of the description, the qualifications front, rear, right, left, top and bottom are defined with respect to the forward direction of the vehicle. , that is to say with respect to the direction of the arrow referenced 80 in FIG.
Le mécanisme de coupure 5 comprend une barrette de coupure 10. Il s'agit ici d'un mécanisme de coupure bi-fonction, c'est-à-dire que la barrette de coupure peut se positionner selon deux positions, une première position dans laquelle elle obture partiellement le faisceau lumineux et correspondant au feu de code et une deuxième position dans laquelle elle n'obture pas ou moins le faisceau lumineux et correspondant au feu de route. Dans sa première position, la barrette de coupure 10 s'étend selon un plan sensiblement vertical alors que dans sa deuxième position elle s'étend dans un plan sensiblement horizontal. The cut-off mechanism 5 comprises a cut-off bar 10. This is a bi-function breaking mechanism, that is to say that the cut-off bar can be positioned in two positions, a first position in which it partially closes the light beam and corresponding to the code light and a second position in which it does not close or less light beam and corresponding to the high beam. In its first position, the cutoff bar 10 extends in a substantially vertical plane while in its second position it extends in a substantially horizontal plane.
La barrette de coupure 10 est positionnée en face de la source lumineuse. Elle est montée sur un support 1 1 de barrette comprenant une première partie 12 disposant d'un engrenage 14, située au niveau d'une première extrémité longitudinale 72 de la barrette 10. La première partie est ici en forme d'un secteur de disque et comprend une partie centrale 21 à la périphérie de laquelle se trouve l'engrenage 14. Le support 1 1 de la barrette comprend également une deuxième partie 13 disposant d'un moyen de rappel, notamment un ressort de rappel 15, tendant à ramener la barrette 10 dans la première position, c'est-à-dire dans sa position sensiblement verticale, la deuxième partie 13 étant située au niveau d'une deuxième extrémité longitudinale 73 de la barrette 10. La première extrémité longitudinale 72 est située à gauche de la barrette 10 sur la figure 2 alors que la deuxième extrémité longitudinale 73 est située à droite de la barrette 10. The cutoff bar 10 is positioned in front of the light source. It is mounted on a support 1 1 of bar comprising a first portion 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 sector disk and comprises a central portion 21 at the periphery of which is the gear 14. The support 1 1 of the bar also comprises a second portion 13 having a return means, in particular a return spring 15, tending to bring the bar 10 in the first position, that is to say in its substantially vertical position, the second portion 13 being located at a second longitudinal end 73 of the bar 10. The first longitudinal end 72 is located to the left of the bar 10 in Figure 2 while the second longitudinal end 73 is located to the right of the bar 10.
La barrette 10 est ici en acier. Elle est de forme sensiblement rectangulaire et agencée pour obturer plus ou moins le faisceau lumineux comme expliqué précédemment, c'est-à-dire pour couper plus ou moins le faisceau lumineux. The bar 10 is here made of steel. It is of substantially rectangular shape and arranged to more or less close the light beam as explained above, that is to say to cut more or less the light beam.
Le support 1 1 de barrette est monté sur une armature 50 du mécanisme de coupure 5. Le mécanisme de coupure 5 comprend également un moyen d'entraînement 90 comprenant notamment la première partie 12 du support 1 1 et un pignon muni d'une denture, actionné par un moteur à courant continu 30. Le moyen d'entraînement 90 est relié à un arbre d'entraînement 38 du moteur à courant continu 30 de manière à entraîner la barrette de coupure. The support 1 1 bar is mounted on a frame 50 of the cut-off mechanism 5. The cut-off mechanism 5 also comprises a drive means 90 including in particular the first portion 12 of the support January 1 and a pinion with a toothing, The drive means 90 is connected to a drive shaft 38 of the DC motor 30 so as to drive the cut-off bar.
Le moteur 30 est de forme sensiblement parallélépipédique de sorte qu'il comprend une face supérieure 32, une face avant 33, une face inférieure 34, une face arrière 35, une face gauche 36 et une face droite 37. La face supérieure 32 et la face inférieure 34, opposées entre elles sont de formes courbées. 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 straight face 37. The upper face 32 and the lower face 34, opposite each other are of curved shapes.
Au niveau de la face gauche 36 du moteur 30 se situe le moyen d'entraînement 90. Il est relié à l'arbre de transmission 38, faisant saillie par rapport à la face gauche 36 du moteur 30 et situé sensiblement au milieu de la face gauche 36 du moteur 30. At the left face 36 of the motor 30 is the drive means 90. It is connected to the transmission shaft 38, projecting from the left face 36 of the motor 30 and located substantially in the middle of the face left 36 of the engine 30.
Le moteur 30 est monté sur un support de moteur 40 situé au centre et vers l'avant de l'armature 50, c'est-à-dire entre le moteur et lentille, une fois le mécanisme de coupure 5 monté dans le module optique. The motor 30 is mounted on a motor support 40 located in the center and towards the front of the armature 50, that is to say between the motor and lens, once the cut-off mechanism 5 is mounted in the optical module. .
Le mécanisme de coupure 5 comprend également un écran thermique 60 épousant une face externe du support 40 du moteur 30 dirigée vers l'avant. L'écran thermique 60 est ainsi situé entre le support 40 de moteur et la lentille. Il est en métal de sorte qu'il protège le support 40 de moteur et le moteur 30 des rayons du soleil. La partie centrale 21 de la première partie 12 du support 1 1 comprend une lumière (non visible) coopérant avec un bossage 61 du mécanisme de coupure 5 situé sur l'armature 50. La liberté de déplacement du bossage 61 dans la lumière définit la rotation que doit effectuer la barrette de coupure entre sa première position et sa deuxième position. Ainsi la lumière définit une première butée contre laquelle le bossage 61 vient en butée lorsque la barrette de coupure est dans sa première position et une deuxième butée contre laquelle le bossage 61 vient en butée lorsque la barrette de coupure est dans sa deuxième position. Le moteur 30 entraine la barrette de coupure par l'intermédiaire de son moyen d'entraînement 90 et de l'arbre de transmission 38 de sa première position jusqu'à sa deuxième position en basculant ici la barrette de coupure vers l'avant. Tant que l'on souhaite maintenir la barrette de coupure 10 en position de feux de route, c'est-à-dire dans sa deuxième position, le moteur reste activé pour que son arbre de transmission 38 maintienne la barrette de coupure 10 dans cette position par l'intermédiaire du moyen d'entraînement 90. The cut-off mechanism 5 also comprises a heat shield 60 matching an outer face of the support 40 of the motor 30 directed towards the front. The heat shield 60 is thus located between the engine support 40 and the lens. It is made of metal so that it protects the motor mount 40 and the motor 30 from the sun's rays. The central portion 21 of the first portion 12 of the support January 1 comprises a light (not visible) cooperating with a boss 61 of the cutoff mechanism 5 located on the armature 50. The freedom of movement of the boss 61 in the light defines the rotation the cutoff bar must be between its first position and its second position. Thus the light defines a first stop against which the boss 61 abuts when the cutoff bar is in its first position and a second stop against which the boss 61 abuts when the cutoff bar is in its second position. The motor 30 drives the cutoff bar through its drive means 90 and the drive shaft 38 from its first position to its second position by switching the cutoff bar forward. As long as it is desired to maintain the cut-off bar 10 in the high beam position, that is to say in its second position, the motor remains activated so that its transmission shaft 38 maintains the cut-off bar 10 in this position. position via the drive means 90.
Lorsque le moteur est désactivé, son arbre de transmission 38 devient libre en rotation et la barrette de coupure 10 est amenée à sa première position grâce au ressort de rappel 15. When the motor is deactivated, its transmission shaft 38 becomes free to rotate and the cut-off bar 10 is brought to its first position by virtue of the return spring 15.
Selon l'invention, le moyen d'entraînement 90 comprend un dispositif de découplage 81 du mouvement de l'arbre de transmission 38 par rapport à celui de la barrette de coupure 10 lorsque la barrette de coupure 10 atteint la première position. Ainsi, au moment où la première butée du moyen d'entraînement 90 arrive contre le bossage 61 , la barrette de coupure est arrêtée dans sa première position et l'arbre de transmission 38 continue à tourner grâce au dispositif de découplage ne provoquant donc pas de rebonds de la barrette de coupure 10. According to the invention, the drive means 90 comprises a decoupling device 81 of the movement of the transmission shaft 38 relative to that of the cutoff bar 10 when the cutoff bar 10 reaches the first position. Thus, when the first stop of the drive means 90 comes against the boss 61, the cutoff bar is stopped in its first position and the transmission shaft 38 continues to rotate thanks to the decoupling device thus causing no rebounds of the cutoff bar 10.
Le dispositif de découplage 81 est décrit de manière plus détaillée sur les figures 4 à 6. On remarque sur ces figures qu'il comprend une première pièce 82 sensiblement cylindrique, coaxiale et liée à l'arbre de transmission 38, c'est- à-dire que la première pièce est solidaire de l'arbre de transmission 38. La première pièce 82 comprend, un anneau 91 , situé au niveau de sa base, c'est- à-dire de sa partie située la plus proche du moteur. L'anneau 91 est de diamètre supérieur à la forme cylindrique de la première pièce 82. La première pièce 82 peut être située au niveau d'une extrémité distale de l'arbre de transmission 38. Elle comprend une nervure 87 qui s'étend radialement à la périphérie du cylindre. The decoupling device 81 is described in greater detail in FIGS. 4 to 6. It will be noted in these figures that it comprises a first substantially cylindrical piece coaxial and connected to the transmission shaft 38, ie that is to say that the first piece is integral with the transmission shaft 38. The first piece 82 comprises a ring 91 located at its base, that is to say, its part located closest to the engine. The ring 91 has a larger diameter than the cylindrical shape of the first piece 82. The first piece 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.
Le dispositif de découplage comprend également une deuxième pièce 83 sensiblement cylindrique et entraînant la barrette de coupure. Dans l'exemple illustré, la deuxième pièce 83 entraine la barrette de coupure par l'intermédiaire de la première partie 12 du support de barrette comprenant l'engrenage. The decoupling device also comprises a second substantially cylindrical part 83 and driving the cut-off bar. In the illustrated example, the second part 83 drives the cut-off bar via the first part 12 of the bar support comprising the gear.
La deuxième pièce 83 est ici un pignon comprenant une denture 89. La deuxième pièce 83 peut ainsi s'engrener avec le l'engrenage de la première partie afin d'entraîner la barrette de coupure. La deuxième pièce comprend une ouverture centrale, coaxiale à l'arbre de transmission. La deuxième pièce 83 comprend une rainure 84 s'enfonçant radialement, depuis l'ouverture centrale vers l'extérieur, dans l'épaisseur du pignon. La rainure 84 est ici en forme de secteur angulaire. Elle s'étend entre une première extrémité 85 située sur la gauche de la figure 4 et une deuxième extrémité 86 située sur la droite de la figure 4. La première pièce est située ici au centre de la deuxième pièce 83. La rainure 84 est située autour de la première pièce 82, notamment à la périphérie de celle-ci. The second piece 83 is here a pinion comprising a set of teeth 89. The second piece 83 can thus mesh with the gear of the first part in order to drive the cutoff bar. The second part comprises a central opening, coaxial with the drive shaft. The second piece 83 comprises a groove 84 penetrating radially, from the central opening to the outside, in the thickness of the pinion. The groove 84 is here in the form of angular sector. It extends between a first end 85 situated on the left of FIG. 4 and a second end 86 located on the right of FIG. 4. The first piece is located here in the center of the second piece 83. groove 84 is located around the first piece 82, especially at the periphery thereof.
L'ouverture centrale de la deuxième pièce 83 accueille la première pièce 82 et c'est la rainure 84 qui accueille la nervure 87. La première pièce 82 est ainsi insérée dans la deuxième pièce 83 de sorte que l'anneau 91 soit au contact de la deuxième pièce 83. Ainsi le dispositif de découplage 81 a la forme d'un pignon classique et peut être positionné sur un arbre de transmission de l'art antérieur sans nécessiter d'adaptation particulière de l'arbre de transmission 38. The central opening of the second piece 83 accommodates the first piece 82 and it is the groove 84 which receives the rib 87. The first piece 82 is thus inserted into the second piece 83 so that the ring 91 is in contact with the second piece 83. Thus 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 special adaptation of the transmission shaft 38.
La rainure 84 est située à la périphérie de la première pièce 82. Elle autorise la première pièce 82 à tourner autour de l'axe de l'arbre de transmission, à l'intérieur du secteur angulaire qu'elle définit sans que la deuxième pièce 83 ne tourne. On comprend ici que la première pièce 82 et la deuxième pièce 83 sont liées de manière à permettre un débattement angulaire de la première pièce 82 par rapport à la deuxième pièce 83 selon un axe de rotation de l'arbre de transmission 38. Le mouvement de la première pièce 82 dans la rainure 84 est ainsi découplé du mouvement de la deuxième pièce 83. En effet, lorsque le moteur 30 entraine la barrette de coupure 10 de la première à la deuxième position, son arbre de transmission 38 tourne ici selon le sens des aiguilles d'une montre sur la figure 4 de sorte que la nervure 87 appuie sur la deuxième extrémité 86 de la rainure 84 et entraine ainsi en rotation la deuxième pièce 83 qui entraine à son tour la barrette de coupure par l'intermédiaire de l'engrenage. Lorsque le moteur 30 est désactivé, le ressort de rappel 15 appuie, par l'intermédiaire de la première partie 13, contre la barrette de coupure 10 qui entraine alors l'engrenage 14 qui entraine à son tour la deuxième pièce 83 dans une rotation dans le sens inverse des aiguilles d'une montre sur la figure 4. Cette dernière entraine alors la première pièce 82 dont la nervure 87 se trouve en butée contre la deuxième extrémité 86 de la rainure 84. Ainsi, lorsque la première butée arrive contre le bossage c'est-à-dire au moment où la barrette de coupure arrive dans sa première position, elle s'arrête de tourner, ce qui a pour conséquence d'arrêter la rotation de l'engrenage et donc de la deuxième pièce 83. L'arbre de transmission 38 continue cependant sa rotation du fait de son inertie, la rainure 84 autorisant alors le déplacement de la nervure 87 et donc de la première pièce 82 liée à l'arbre de transmission 38. On obtient ainsi, sur l'étendue de la rainure, un découplage du mouvement de l'arbre de transmission 38 par rapport à celui de la barrette de coupure lorsque cette dernière atteint sa première position. The groove 84 is located at the periphery of the first piece 82. It allows the first piece 82 to rotate about the axis of the transmission shaft, within the angular sector that it defines without the second piece 83 does not turn. It will be understood that the first piece 82 and the second piece 83 are connected so as to allow an angular displacement of the first piece 82 relative to the second piece 83 along an axis of rotation of the transmission shaft 38. the first piece 82 in the groove 84 is thus uncoupled from the movement of the second piece 83. Indeed, when the motor 30 drives the cut-off bar 10 from the first to the second position, its transmission shaft 38 turns here in the direction clockwise in FIG. 4 so that the rib 87 presses on the second end 86 of the groove 84 and thus rotates the second piece 83 which in turn drives the cut-off bar via the gear. When the motor 30 is deactivated, 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 piece 83 in a rotation in counterclockwise in Figure 4. The latter then drives the first piece 82 whose rib 87 is in abutment against the second end 86 of the groove 84. Thus, when the first stop arrives against the boss that is to say when the cutoff bar arrives in its first position, it stops rotating, which has the effect of stopping the rotation of the gear and therefore the second piece 83. The transmission shaft 38 however continues its rotation because of its inertia, the groove 84 then allowing the displacement of the rib 87 and thus the first piece 82 connected to the transmission shaft 38. This gives, on the extent of the groove, a decoupling of the movement of the transmission shaft 38 relative to that of the cutoff bar when the latter reaches its first position.
La nervure 87 parcourt le trajet défini par la rainure 84 jusqu'à arriver en butée contre la première extrémité 85 de la rainure 84. L'arbre de transmission étant soumis à des frottements internes au moteur, il perd ainsi de la vitesse pendant sa rotation correspondant au secteur angulaire défini par la rainure. Sa quantité de mouvement sera ainsi réduite de sorte que les rebonds auxquels est soumise la barrette de coupure seront réduits. The rib 87 traverses the path defined by the groove 84 to abut against the first end 85 of the groove 84. The transmission shaft being subjected to friction internal to the engine, it loses speed during its rotation. corresponding to the angular sector defined by the groove. Its momentum will thus be reduced so that the bounces to which the cut-off bar is subjected will be reduced.
Le dispositif de découplage 81 peut également comprendre un ou des moyens d'amortissement de sorte que le mouvement de l'arbre de transmission soit davantage freiné et que sa vitesse soit davantage réduite lorsque la nervure 87 arrive à la première extrémité 85 de la rainure 84. Ces moyens d'amortissement comprennent ici la première pièce 82 et la deuxième pièce 83 et sont constitués en particulier des frottements entre la première pièce 82 et la deuxième pièce 83, notamment entre la nervure 87 et le fond de la rainure 84. Des frottements entre la première pièce 82 et la deuxième pièce 83 autres que ceux réalisés entre la nervure 87 et la rainure 84 peuvent également amortir le mouvement de l'arbre de transmission 38. The decoupling device 81 may also comprise 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 reaches the first end 85 of the groove 84. These damping means here comprise the first piece 82 and the second piece 83 and consist in particular of friction between the first piece 82 and the second piece 83, in particular between the rib 87 and the bottom of the groove 84. Frictions between the first piece 82 and the second piece 83 other than those made between the rib 87 and the groove 84 can also dampen the movement of the transmission shaft 38.
Il est possible de choisir un débattement angulaire entre la première pièce et la deuxième pièce en changeant les dimensions de la rainure 84 en fonction notamment de l'amortissement désiré du mouvement de l'arbre de transmission 38. It is possible to choose an angular displacement between the first piece and the second piece by changing the dimensions of the groove 84 depending in particular on the desired damping of the movement of the transmission shaft 38.

Claims

Revendications claims
1 . Mécanisme de coupure (5) de module optique (1 ) comprenant une barrette de coupure (10), un moteur (30) entraînant la barrette de coupure (10) entre au moins une première et une deuxième position par l'intermédiaire d'un arbre de transmission (38) du moteur (30) et d'un moyen d'entraînement (90) de la barrette de coupure (10) lié à l'arbre de transmission (38), un moyen de rappel (15) tendant à ramener la barrette de coupure (10) dans sa première position, caractérisé par le fait que le moyen d'entraînement (90) comprend un dispositif de découplage (81 ) du mouvement de l'arbre de transmission (38) par rapport à celui de la barrette de coupure (10) lorsque la barrette de coupure (10) atteint la première position. 1. An optical module breaking mechanism (5) comprising a cut-off bar (10), a motor (30) driving the cut-off bar (10) between at least a first and a second position via a transmission shaft (38) of the motor (30) and a drive means (90) of the cutoff bar (10) connected to the transmission shaft (38), a return means (15) tending to bringing the cut-off bar (10) into its first position, characterized in that the drive means (90) comprises a device (81) for decoupling the movement of the transmission shaft (38) from that of the the cutoff bar (10) when the cutoff bar (10) reaches the first position.
2. Mécanisme de coupure (5) selon la revendication 1 , dans lequel ledit dispositif de découplage (81 ) comporte un ou des moyens d'amortissement du mouvement de l'arbre de transmission (38) une fois que la barrette de coupure (10) a atteint la première position. 2. Cut-off mechanism (5) according to claim 1, wherein said decoupling device (81) comprises one or more damping means of the movement of the transmission shaft (38) once the cutoff bar (10) ) reached the first position.
3. Mécanisme de coupure (5) selon la revendication 1 ou 2, dans lequel le dispositif de découplage (81 ) comprend une première pièce (82) solidaire de l'arbre de transmission (38) et une deuxième pièce (83) entraînant la barrette de coupure (10) en rotation, la première pièce (82) étant entraînée par la deuxième pièce (83) quand la barrette de coupure passe de la deuxième position à la première position, ladite première pièce (82) se découplant du mouvement de la deuxième pièce (83) lorsque la barrette de coupure (10) atteint la première position. 3. cut-off mechanism (5) according to claim 1 or 2, wherein the decoupling device (81) comprises a first piece (82) integral with the transmission shaft (38) and a second piece (83) driving the cutting bar (10) in rotation, the first piece (82) being driven by the second piece (83) when the cut-off bar passes from the second position to the first position, said first piece (82) decoupling from the movement of the second piece (83) when the cutoff bar (10) reaches the first position.
4. Mécanisme de coupure (5) selon la revendication 3, dans lequel la deuxième pièce (83) amortit le mouvement de la première pièce (82) lorsque la barrette de coupure (10) atteint la première position. 4. Cutoff mechanism (5) according to claim 3, wherein the second piece (83) dampens the movement of the first piece (82) when the cutoff bar (10) reaches the first position.
5. Mécanisme de coupure (5) selon la revendication 3 ou 4, dans lequel la deuxième pièce (83) comprend une denture (89) réalisant un engrenage avec ladite barrette de coupure (10). 5. Cutoff mechanism (5) according to claim 3 or 4, wherein the second piece (83) comprises a toothing (89) making a gear with said cutoff bar (10).
6. Mécanisme de coupure (10) selon l'une des revendications 3 à 5, dans lequel la première et la deuxième pièces (82, 83) sont liées de manière à permettre un débattement angulaire de la première pièce (82) par rapport à la deuxième pièce (83) selon un axe de rotation de l'arbre de transmission (38). 6. cut-off mechanism (10) according to one of claims 3 to 5, wherein the first and second parts (82, 83) are connected so as to allow angular movement of the first piece (82) relative to the second piece (83) along an axis of rotation of the transmission shaft (38).
7. Mécanisme de coupure (5) selon la revendication 6, dans lequel la deuxième pièce (83) comprend une rainure (84) en forme de secteur angulaire et la première pièce (82) comprend une nervure (87) se déplaçant dans ladite rainure (84) de manière à autoriser ledit débattement angulaire. 7. Cutoff mechanism (5) according to claim 6, wherein the second piece (83) comprises a groove (84) in the form of angular sector and the first piece (82) comprises a rib (87) moving in said groove (84) to allow said angular deflection.
8. Mécanisme de coupure (5) selon la revendication 2 ensemble avec la revendication 7, dans lequel le moyen d'amortissement est constitué par le frottement entre la nervure (87) et la rainure (84). 8. cut-off mechanism (5) according to claim 2 together with claim 7, wherein the damping means is constituted by the friction between the rib (87) and the groove (84).
9. Mécanisme de coupure (5) selon la revendication 7 ou 8, dans lequel la première pièce (82) à la forme d'un cylindre situé au niveau d'une extrémité distale de l'arbre de transmission (38), ladite nervure (87) étant située à la périphérie du cylindre. 9. Cutoff mechanism (5) according to claim 7 or 8, wherein the first piece (82) in the form of a cylinder located at a distal end of the transmission shaft (38), said rib (87) being located at the periphery of the cylinder.
10. Mécanisme de coupure (5) selon l'une des revendications 7 à 9, dans lequel la première pièce (82) est située au centre de la deuxième pièce (83), ladite rainure (84) en forme de secteur angulaire étant située à la périphérie de ladite première pièce (83). 10. Cut-off mechanism (5) according to one of claims 7 to 9, wherein the first piece (82) is located in the center of the second piece (83), said groove (84) in the form of angular sector being located at the periphery of said first piece (83).
1 1 . Module optique (1 ) comprenant un mécanisme de coupure (5) selon l'une quelconque des revendications précédentes. 1 1. Optical module (1) comprising a cut-off mechanism (5) according to any one of the preceding claims.
EP14756093.2A 2013-08-06 2014-08-05 Vehicle headlamp with projection lens and movable shade Active EP3030831B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1357839A FR3009602B1 (en) 2013-08-06 2013-08-06 LIGHT BEAM BREAKING MECHANISM FOR OPTICAL MODULE AND OPTICAL MODULE
PCT/FR2014/052038 WO2015019021A1 (en) 2013-08-06 2014-08-05 Mechanism for cutting off a light beam for an optical module and said optical module

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EP3030831A1 true EP3030831A1 (en) 2016-06-15
EP3030831B1 EP3030831B1 (en) 2021-02-24

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EP14756093.2A Active EP3030831B1 (en) 2013-08-06 2014-08-05 Vehicle headlamp with projection lens and movable shade

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EP (1) EP3030831B1 (en)
CN (1) CN105452761B (en)
FR (1) FR3009602B1 (en)
WO (1) WO2015019021A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2895783B1 (en) * 2006-01-05 2008-02-01 Valeo Vision Sa THREE-FUNCTION LIGHT PROJECTOR FOR MOTOR VEHICLE
JP4714108B2 (en) * 2006-08-09 2011-06-29 株式会社小糸製作所 Infrared light irradiation lamp for vehicles
FR2936591B1 (en) * 2008-09-30 2014-09-12 Valeo Vision Sas OPTICAL MODULE FOR A MOTOR VEHICLE FOR SELECTIVELY LIGHTING A ZONE
DE202009009519U1 (en) * 2009-07-07 2009-09-17 Automotive Lighting Reutlingen Gmbh Motor vehicle headlight with an additional panel
DE202011005617U1 (en) * 2011-04-27 2011-06-27 Automotive Lighting Reutlingen GmbH, 72762 Light module of a motor vehicle headlight

Non-Patent Citations (1)

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Title
See references of WO2015019021A1 *

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CN105452761A (en) 2016-03-30
EP3030831B1 (en) 2021-02-24
WO2015019021A1 (en) 2015-02-12
CN105452761B (en) 2018-08-31
FR3009602A1 (en) 2015-02-13
FR3009602B1 (en) 2015-08-28

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