EP1867917A1 - Optisches Modul für einen Scheinwerfer, insbesondere für Kraftfahrzeuge - Google Patents

Optisches Modul für einen Scheinwerfer, insbesondere für Kraftfahrzeuge Download PDF

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Publication number
EP1867917A1
EP1867917A1 EP07290733A EP07290733A EP1867917A1 EP 1867917 A1 EP1867917 A1 EP 1867917A1 EP 07290733 A EP07290733 A EP 07290733A EP 07290733 A EP07290733 A EP 07290733A EP 1867917 A1 EP1867917 A1 EP 1867917A1
Authority
EP
European Patent Office
Prior art keywords
cover
module according
spring
motor
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07290733A
Other languages
English (en)
French (fr)
Inventor
Jin Qian
Jonathan Blandin
Jean-Sébastien Gros
Guillaume Tronquet
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 EP1867917A1 publication Critical patent/EP1867917A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—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 an optical module for a projector intended in particular for a motor vehicle.
  • the invention also relates to a projector equipped with such an optical module, and a motor vehicle equipped with at least one such projector.
  • the invention relates more particularly to the projectors of the single light source type, and mobile cache.
  • a projector is able to emit a light beam towards the front of a vehicle.
  • the projector comprises in the usual manner an elliptical type reflector, which comprises two foci arranged on its optical axis, a light source located in the vicinity of the first focus, and a cache arranged in the vicinity of the second focus.
  • the cover is pivotally mounted about an axis of rotation orthogonal to the optical axis, and is provided with shutters. Depending on the angular position of the cover, the shutters perform the cutting of the light beam, that is to say they intercept a portion of the light rays emitted by the light source. This gives the projector several lighting modes that differ in their range in length, width and cut-off line and are selected by the driver or automatically activated according to traffic conditions.
  • the usual lighting modes include, for example, position lights, dipped beams, road beams, beams for driving on the highway, for driving in the city, for driving in bad weather, fog beams. Also there are caches that change the cutoff line of the projector depending on whether the vehicle is in a country to traffic on the right or left of the roadway.
  • the angular position of the cover is controlled by an electric motor with possibly an intermediate transmission between the motor and the shaft of the cover.
  • the extreme positions of the cache are determined using stops. Between its extreme positions, the cache is slaved in rotation for example by means of a transducer which reacts according to the angular position of the cache.
  • cache control devices that implement a stepper motor and / or one or more electromagnets.
  • This module comprises a reflector, a light source associated with the reflector, the reflector defining an optical axis, a cover movable in rotation about an axis substantially perpendicular to the optical axis of the reflector with at least one flap arranged to intercept at the less in part the ray beam, a rotating control system of the mobile cover to control its angular position.
  • the rotary control system of the cover comprises a motor with a drive system capable of driving the cover in at least one direction of rotation towards an extreme position, and an elastic return device for returning the cover towards an active rest position.
  • the drive system is capable of driving the cover in two different directions of rotation.
  • the cover may have, in particular, three discrete angular positions, comprising for example two extreme angular positions and an intermediate position, which may be the "rest position" of the cache.
  • the optical projector module 10 which is shown in Figure 1 is more particularly adapted to equip a front projector for a motor vehicle. It comprises a frame 11 through which the module is assembled to the rest of the vehicle. At the rear of the frame the module has a reflector 12. In a conventional manner the reflector may be integral with the frame or be assembled thereto by any appropriate means.
  • the reflector has an inner optical surface that is ellipsoidal in type and is open toward the front.
  • the reflector has two foci, a back focus and a front focus that are located along its optical axis. The terms front and back are to be interpreted in relation to the direction of lighting of the projector.
  • a light source is located at the rear focus. Any light source is suitable.
  • the light source is a discharge lamp 15, including a xenon lamp mounted on the back of the reflector.
  • the reflector has an opening that opens onto a lens 17.
  • the lens is carried by a lens holder 18 which is assembled on the front of the frame 11.
  • Other modes of construction may also be suitable.
  • a movable cover 20 is located at the front focus of the reflector. It is more particularly visible in Figure 2. Known manner, it has a shaft 21 oriented perpendicularly to the optical axis of the reflector.
  • the shaft 21 carries radial flaps such as the flaps 22, 23, 24 which each have a line of peak defined.
  • the shutters are designed to intercept a portion of the light rays at the exit of the reflector so as to form a light beam with a range, a width and a cut line determined.
  • the cover is rotatable about the axis of the shaft.
  • the cache shaft is carried by the side cheeks of a frame 26 which is assembled to the frame 11.
  • the frame can also form a one-piece assembly with the frame.
  • the cover has at most three stable angular positions, that is to say two extreme positions and an intermediate position of rest. In each of these stable angular positions the flaps are present or absent in the beam of rays.
  • the flaps 22 and 23 are used together to form a passing beam which makes it possible to cross a vehicle without dazzling its driver, the shutter 24 forms a motorway beam of a range of about 200 meters.
  • the beam is cut by no flap, this corresponds to the road position.
  • Other components may be used for other functions than those described.
  • a transmission assembly is used to drive the rotating cover.
  • this assembly comprises an electric motor 28 mounted on the chassis 26, a gear 29 mounted on the motor shaft and a transmission gear wheel 30 mounted at one end of the shaft of the cover.
  • the cover 20 has two distinct directions of rotation.
  • the motor 28 which drives it is of the direct current type, its direction of rotation being determined by the polarity of the voltage which is applied to its supply terminals.
  • Other drive systems may also be suitable.
  • the motor 28 drives the cover 20 towards one or the other of the two extreme positions against the restoring force of an elastic return device which recalls the cover towards the intermediate rest position.
  • a spring 32 is located at the end of the shaft 21 on the opposite side to the toothed wheel 30.
  • the spring shown is of the cylindrical torsion spring type whose turns increase with a closer approximation. its end branches 33 and 34.
  • the axis of the turns of the spring is parallel or substantially parallel to the axis of the cache shaft.
  • the spring is mounted floating, that is to say that its turns are engaged on the end of the shaft and its end branches 33 and 34 of the spring are retained by a simple support between a drive stop of the cover and a retaining stop of the chassis.
  • Each stop is here formed of two tabs, the drive tabs 36 and 37 for the cover 20, and the retaining tabs 38 and 39 for the frame 26.
  • the end branches of the spring are oriented in a plane perpendicular to the axis of the tree.
  • the drive lugs and the retaining lugs are opposite, and their spacing is provided so that each of the branches 33 and 34 of the spring 32 simultaneously rests on a drive lug and a retaining tab when the cover is in its intermediate rest position.
  • the two end branches of the spring are parallel and the legs of the frame have the same spacing as those of the cache.
  • the support lugs could be arranged so that the branches of the spring are not parallel in the active rest position of the cache.
  • one of the drive tabs of the cover carries with it one of the end branches of the spring.
  • the other branch of the spring is retained by a retaining tab of the chassis.
  • the spring is more constrained in torsion.
  • the restoring force that it exerts on the cache increases with the amplitude of the rotation of the cache.
  • the spring recalls the cache in its rest position.
  • At least one of the end branches of the spring rests on inverted bevels of the drive and retaining lugs, as shown in FIG. 3a.
  • the branch of the spring plays in flexion and the spring balances its supports between the four legs of the frame and the cache.
  • Other means may also be suitable, for example an elastically deformable bearing pad for a branch of the spring on at least one leg.
  • the spring is at the end of the shaft opposite to that carrying the gear wheel 30. This is not limiting, and the spring can be mounted on the gear side. .
  • the intermediate position of rest is an active position of the cache which corresponds to one of the modes of lighting of the projector.
  • the "rest” is in fact to be understood as that of the system comprising the cover and the return spring, whereas the so-called “active” position is the optically active position of the cover: the cover is said to be “active” optically when it acts on the beam emitted by the source, intercepting some of the emitted rays.
  • this intermediate rest position therefore corresponds to a cut-off beam, in particular a code / cross-type beam.
  • the spring recalls the cover in this position is the most versatile for different modes of traffic of a vehicle.
  • the headlamp in the event of a failure, the headlamp must send a glare-free beam, which is the case with the low beam.
  • the crossing / code type beams have a cut generally with at least one oblique pan.
  • the rest position can also be an active position of the cache corresponding to other types of cut-off beams, such as a flat cut (anti-fog type beams).
  • each extreme position is marked by the cooperation of a shim 44 of the frame and a cam 43 of the cover.
  • the shim and the cam are on the gear side. This has the particular effect of preventing the cover is biased in torsion when these elements come into contact with one another.
  • the shim 44 has two limit stops 45 and 46 which each cooperate with a contact face 47, 48 of the cam 43 thus defining the two end portions of the cover.
  • Figures 5 and 6 show the cover in each of these extreme positions. In FIG. 5, the rotation of the cover is impeded by the contact of the contact face 47 with the end stop 45. In FIG. 6, the cover has been driven in the opposite direction, and its rotation is impeded by the contact of the contact face 48 with the end stop 46.
  • Each of the extreme positions is reached after a cache rotation of about 120 degrees. However this is not limiting, and the rotation amplitude of the cache could be different. The important thing is that in each of the intermediate or extreme positions of the cache there is no cut of the light rays by an inactive flap.
  • the cover and the frame are made of any suitable material and in particular they are made of plastic or metal.
  • One of these openings 40 is visible in Figure 2. Its opening is oriented towards the upper part of the frame.
  • the orientation of the openings is not limiting.
  • the openings are oriented in the same direction as the end branches of the spring. In this way the editing is simplified. Indeed, at first the spring is put in place at the end of the shaft, it is put under prestressing relative to the cache. It then forms with the cache an autonomous subset. Then by the same movement the ends of the shaft are put in place in the frame and the spring legs are put in place relative to the retaining tabs of the frame.
  • Figure 7 illustrates such a mounting mode.
  • the frame has on each cheek a flared opening such that the opening 41 in the form of a funnel which is oriented towards the general direction of the branches of the spring 42, in the intermediate rest position of the cover.
  • a housing is provided at the bottom of the opening for the tree. This housing forms a rotation bearing for the shaft, and the shaft penetrates therein following an elastic deformation of the cheek.
  • the end branches of the spring bear against the retaining tabs 51 and 52 of the frame. It may be noted here that the end branches of the spring are not parallel in the intermediate rest position of the cover. However, the central axis of the opening 41 is common with the central axis formed by the branches of the spring 42 once mounted in the frame. All this contributes to the simplicity of mounting the cache on the chassis.
  • the angle formed by the branches here is about 270 degrees. This value is only indicative, and other values of larger or smaller angles may also be appropriate.
  • the angle formed by the end branches is between 120 and 270 degrees to facilitate the installation of the spring at the time of mounting the cover in the frame.
  • the drive tabs of the cover are closer to the axis of rotation of the shaft that the retaining tabs of the frame so as not to hinder the stroke of the cache. This also reduces the inertia of the rotating cache.
  • the spring is mounted so that the rotation of the cover towards its end position tends to wind the turns rather than unrolling them. But the other mode of assembly is also suitable.
  • Figures 8 to 11 relate to another embodiment.
  • the cover 53 is rotatably mounted on a frame 54.
  • the cover has a driver 55 with two branches 55a and 55b.
  • the cover and the coach are integral in rotation.
  • Two links 56 and 57 are mounted in free rotation at the end of the trainer.
  • the links are biased resiliently by a spring 59 against drive pads 55c, 55d that each of the branches 55a and 55b.
  • the spring is of the cylindrical twist spring type with turns.
  • the spring is mounted floating with its turns engaged on the end of the driver 55 and its end branches hooked to the rods.
  • the spring 59 is prestressed so that the rods exert an elastic stress on each of a limb 55a, 55b of the driver with an elastic stress.
  • each rod In active rest position, each rod is in abutment against a retaining stop.
  • the retaining stop is here formed of two pads 60, 61. The relative position of these pads is provided so that the links are simultaneously in abutment against the drive stops 55c, 55d of the branches and the retaining pads 60, 61 of the frame.
  • This position of the cover is its intermediate rest position, for which the projector preferably emits a passing beam.
  • the coach 55 takes with him either of the rods 56, 57, while the other link remains in abutment against its retaining stud. This movement increases the return stress that the spring exerts on the moving rod which in turn transmits it to the cache via the coach.
  • each of the rods is limited by an end stop that defines each extreme position of the cache.
  • Each end stop is for example formed by studs projecting relative to the cheek of the frame. In FIGS. 7 to 11, only the end-of-travel terminal 65 is visible, the other end-of-travel stop being on the other side of the chassis. Other modes of construction may however be suitable.
  • the module operates according to three lighting modes which are defined by two extreme positions of the cache reached by driving the cache using the motor in one direction or the other, and an intermediate position of rest towards which the cache is brought back by the return spring.
  • the mounting of the cover 53 on the frame 54 is made simply, in the manner of what has been described with reference to Figure 7.
  • the cheeks of the frame 54 have a funnel-shaped opening that the opening 62, whose central axis is parallel to the central axis of the end branches of the spring, once the assembly completed. So, the same movement sets up the cache in the chassis, and places them rods in position relative to the retaining studs 60, 61.
  • the angle formed by the links in the intermediate rest position of the cover is here close to 120 degrees.
  • Figure 12 illustrates another mode of construction.
  • the spring 63 is of the cylindrical twist spring type with turns. As before, it is mounted with its turns engaged on the end of the shaft of the cover 64.
  • the end branches 66 and 67 of the spring extend radially. . Under the effect of prestressing, they pinch a driving abutment 68 which is carried by the toothed wheel 69 and a retaining stopper 70 present on the side cheek of the frame 71.
  • the stop 68 which is connected in rotation with the cover carries with it one of the end branches 66, 67 and the other branch is retained by the stop 70.
  • this method of construction includes end stops which delimit the extreme positions of the cache. They will not be described here in detail.
  • the elastic return device may also be suitable, for example a spiral spring whose one end is linked by fitting to the shaft of the cover and the other to the frame. The intermediate rest position of the cover is marked by the absence of stress in the spring.
  • the cache shaft could be hollow and be traversed by a torsion wire whose one end is linked by fitting to the cover and the other linked by fitting to the frame.
  • a torsion wire whose one end is linked by fitting to the cover and the other linked by fitting to the frame.
  • an elastic return device recalls the cache in an intermediate position of rest where its internal stress is canceled.
  • Other devices may also be suitable.
  • a recall command is ordered by the driver of the vehicle or activated automatically.
  • a control circuit is shown schematically in Figure 13 for the motor 73.
  • This is for example a control circuit that delivers to the motor a signal with a variable intensity curve over time. The power supplied to the engine is sufficient to overcome the restoring force of the elastic return device and reach the extreme position in a given maximum time.
  • the circuit 72 reacts and feeds the motor with a lower intensity, which is nevertheless sufficient for the motor to maintain the cache in extreme position despite the restoring force of the elastic device.
  • a control signal is sent for a determined duration which is greater than or equal to the estimated duration for the cache to reach the extreme position, then a second setpoint signal is sent so that the motor maintains the cover in this extreme position.
  • Any suitable means is suitable for producing such a circuit, and in particular a microprocessor loaded with a suitable program.
  • a damping circuit 76 which takes advantage of the fact that the motor is driven by the cache return system and that it then operates as a current generator.
  • a resistor 75 is connected to the terminals of the motor 73. This resistor dissipates a part of the energy that the motor supplies during the return phase of the motor. hides the active position of rest of the cache while the other part of the energy is used to supply the engine with the braking, the braking of the motor thus depends on its speed, from where an effective damping for a value of resistance well chosen. The resistance value is calculated to optimize the return path of the cache.
  • the motor is controlled using the preceding circuit 72 which supplies the motor with a signal making it possible to control its rotation during this return phase and, in particular, to brake it effectively at the end. this phase of return, and possibly accelerate it in a previous phase to decrease the total time of return.
  • the cover could have only one extreme position towards which it is driven by the motor, and an intermediate rest position towards which the elastic return device brings it back when the power supply to the motor is cut off.
  • a mechanical locking for example using a ratchet.
  • the drive, hold and end stops could be constructed in a different way from what has been described.
  • the invention is not limited to a vehicle front projector, it applies generally to any type of lighting or signaling device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP07290733A 2006-06-15 2007-06-12 Optisches Modul für einen Scheinwerfer, insbesondere für Kraftfahrzeuge Withdrawn EP1867917A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0605365A FR2902499B1 (fr) 2006-06-15 2006-06-15 Module optique pour un projecteur destine notamment a un vehicule automobile.

Publications (1)

Publication Number Publication Date
EP1867917A1 true EP1867917A1 (de) 2007-12-19

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EP07290733A Withdrawn EP1867917A1 (de) 2006-06-15 2007-06-12 Optisches Modul für einen Scheinwerfer, insbesondere für Kraftfahrzeuge

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EP (1) EP1867917A1 (de)
CN (1) CN101089459B (de)
FR (1) FR2902499B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2088364A1 (de) 2008-02-08 2009-08-12 Hella KG Hueck & Co. Projektionsscheinwerfer für Fahrzeuge
FR2979595A1 (fr) * 2011-09-07 2013-03-08 Valeo Vision Module optique pour projecteur de vehicule automobile
EP2620325A1 (de) * 2012-01-30 2013-07-31 AML Systems Optisches Modul
EP2597358A3 (de) * 2011-11-28 2015-04-29 Automotive Lighting Reutlingen GmbH Projektionslichtmodul für einen Kraftfahrzeugscheinwerfer
CN112268262A (zh) * 2020-11-12 2021-01-26 常州星宇车灯股份有限公司 一种afs前照灯及其控制方法

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
US9441806B2 (en) * 2012-12-13 2016-09-13 Koito Manufacturing Co., Ltd. Lamp unit
CN108216010B (zh) * 2016-12-14 2023-08-29 常州星宇车灯股份有限公司 一种基于扭力弹簧回复的自适应车灯切换装置
CN107152636B (zh) * 2017-05-31 2020-10-13 苏州元联科技创业园管理有限公司 一种可局部出光的灯具
TWI651489B (zh) * 2018-01-29 2019-02-21 誠益光電科技股份有限公司 智慧頭燈
CN109017541A (zh) * 2018-06-29 2018-12-18 深圳市鹏巨术信息技术有限公司 一种光束切线的调节方法及相关设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978684A1 (de) * 1998-08-03 2000-02-09 Valeo Vision Kfz-Projektionsscheinwerfer mit einer schwenkbaren Blende
DE10334553A1 (de) * 2003-07-30 2005-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
FR2868507A1 (fr) * 2004-04-02 2005-10-07 Valeo Vision Sa Dispositif projecteur avec mecanisme de volet pivotant
EP1596127A1 (de) * 2004-04-27 2005-11-16 Valeo Vision Fixierung einer Torsionsfeder zwischen zwei Teilen eines Kraftfahrzeugscheinwerfers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2115933U (zh) * 1992-04-04 1992-09-16 钱宏毅 防目眩挡光罩
FR2799816B1 (fr) * 1999-10-19 2002-03-22 Valeo Vision Projecteur de vehicule a occulteur mobile
FR2869388B1 (fr) * 2004-04-27 2006-09-01 Valeo Vision Sa Dispositif projecteur avec bloc actionneur multifonctions pour vehicule automobile
CN2734556Y (zh) * 2004-07-27 2005-10-19 上海小糸车灯有限公司 车灯近远光调节装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978684A1 (de) * 1998-08-03 2000-02-09 Valeo Vision Kfz-Projektionsscheinwerfer mit einer schwenkbaren Blende
DE10334553A1 (de) * 2003-07-30 2005-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
FR2868507A1 (fr) * 2004-04-02 2005-10-07 Valeo Vision Sa Dispositif projecteur avec mecanisme de volet pivotant
EP1596127A1 (de) * 2004-04-27 2005-11-16 Valeo Vision Fixierung einer Torsionsfeder zwischen zwei Teilen eines Kraftfahrzeugscheinwerfers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2088364A1 (de) 2008-02-08 2009-08-12 Hella KG Hueck & Co. Projektionsscheinwerfer für Fahrzeuge
FR2979595A1 (fr) * 2011-09-07 2013-03-08 Valeo Vision Module optique pour projecteur de vehicule automobile
EP2568210A1 (de) * 2011-09-07 2013-03-13 Valeo Vision Optisches Modul für Kraftfahrzeugscheinwerfer
WO2013034680A1 (fr) * 2011-09-07 2013-03-14 Valeo Vision Module optique pour projecteur de véhicule automobile
EP2597358A3 (de) * 2011-11-28 2015-04-29 Automotive Lighting Reutlingen GmbH Projektionslichtmodul für einen Kraftfahrzeugscheinwerfer
EP2620325A1 (de) * 2012-01-30 2013-07-31 AML Systems Optisches Modul
FR2986196A1 (fr) * 2012-01-30 2013-08-02 Aml Systems Module optique
CN112268262A (zh) * 2020-11-12 2021-01-26 常州星宇车灯股份有限公司 一种afs前照灯及其控制方法
CN112268262B (zh) * 2020-11-12 2024-02-23 常州星宇车灯股份有限公司 一种afs前照灯及其控制方法

Also Published As

Publication number Publication date
CN101089459A (zh) 2007-12-19
FR2902499A1 (fr) 2007-12-21
CN101089459B (zh) 2012-08-29
FR2902499B1 (fr) 2015-01-23

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Effective date: 20200103