EP1818602B1 - Projecteur d'éclairage pour véhicules automobiles - Google Patents
Projecteur d'éclairage pour véhicules automobiles Download PDFInfo
- Publication number
- EP1818602B1 EP1818602B1 EP07290136.6A EP07290136A EP1818602B1 EP 1818602 B1 EP1818602 B1 EP 1818602B1 EP 07290136 A EP07290136 A EP 07290136A EP 1818602 B1 EP1818602 B1 EP 1818602B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- stop
- type
- rotation
- headlight
- 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.)
- Not-in-force
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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 generally relates to a motor vehicle headlamp comprising a light cache mechanism having at least two rotating light caps to respectively produce at least two different beams of light.
- the invention relates to a dual-function projector capable of producing light beams of code and route for the two traffic modes on the right and traffic on the left.
- a stepper motor is an actuator that remains relatively expensive and requires a suitable electronics, capable of generating the various impulse signals necessary for its control.
- the problem of the loss of pitch is likely to introduce inaccuracy in the angular positioning of the covers which requires the implementation of special provisions for periodically referencing the angular position of the axis of the stepper motor.
- the main purpose of the invention is to provide a technical alternative to the use of a stepper motor in this type of projector.
- the motor vehicle headlight according to the invention comprises a light-shielding mechanism having at least first and second rotatable light caps for respectively producing at least first and second different light beams.
- the mechanical indexing means is chosen from a retractable abutment or other mechanical means of the type roller, blasting, spring, spring latch.
- the term "rest position” is understood to mean the position towards which the cover naturally returns, especially in the event of failure of its actuating means. This is usually a position where the emitted beam is a cut-off beam (as opposed to an unbroken beam of the road type).
- the cover mechanism comprises at least a first stop defining at least a first angular position of stop in cache rotation, the stop being retractable and able to allow a crossing of the first angular position stop in cache rotation by at least one of the first and second light caches when lighting mode switching is controlled in the projector.
- the light cache mechanism also includes at least one second fixed-type stopper defining at least one second cache-off stop angular position for producing a road-type light beam.
- the light cache mechanism also includes resilient means for causing and maintaining a light shield in the first rotational stopping angular position when the actuator is inactive.
- the light cache mechanism includes first and second light caches having profiles. respective ones capable of producing the light beams with code-type cutoff; and the first retractable stopper determines angular positions of the first and second covers for the production of the code-cut light beams.
- the light cache mechanism comprises two fixed second stops located on either side of the retractable stop with predetermined angular offsets and preferably symmetrically, and each fixed second stop determines a second respective rotational stop angular position for each of the first and second covers, for producing a road-type light beam.
- the retractable stop is elastic and flexes to allow a crossing of the first angular position by a light cover when a mechanical torque greater than a maximum threshold torque is applied against the retractable stop.
- the actuator comprises a DC motor and an electronic control circuit capable of controlling the motor in two directions of rotation.
- the electronic control circuit is advantageously equipped with electric current limiting means for limiting an electric current flowing in the motor when the latter is in a locked torque operating state.
- the invention also relates to a motor vehicle equipped with at least one projector (the unitary optical module or the complete projector) according to the invention.
- a third beam of the road type is also proposed, so as to obtain a tri-function optical module, which will correspond to a position of the mechanism of caches that it does not hide the rays emitted by the source directly or after reflection on the associated reflector.
- a particular embodiment of the invention is now described in the form of a dual-function code / road searchlight, identified globally 1, capable of automatically switching between a traffic flow mode on the right and a traffic mode. Traffic left.
- the projector 1 described here is intentionally represented in a simplified manner to Figs.1A to 1B to facilitate the understanding of the invention.
- the projector 1 is of elliptical type and is designed to emit a beam of illumination light along an optical axis AA passing through foci F1 and F2.
- the projector 1 essentially comprises a light source 10 located at a focus F1 of the headlamp 1, an elliptical reflector 11, a lens 12 and a light cache mechanism 13.
- the light source 10, the reflector 11 and the lens 12 are known elements, similar to those usually included in such a lighting projector for a motor vehicle. For this reason, these elements 10, 11 and 12 will not be detailed here.
- the cover mechanism 13 is located substantially at the focal point F2 of the projector 1.
- the cover mechanism 13 essentially comprises two integrally formed covers 130D and 130G 130, a motor actuator 131, a return spring 132 and three stops 133, 133D and 133G.
- the stops 133D and 133G are located on either side of the stop 133, with determined angular offsets, preferably symmetrically.
- the cache 130D is provided with a profile able to introduce a code-like break in the traffic flow mode on the right TD.
- Cache 130G is provided with a profile capable of introducing a code-like break in the left traffic traffic mode TG.
- the motor actuator 131 controls rotations of the cover piece 130 around an axis PP perpendicular to the optical axis AA ( Fig.1 ) of the projector 1.
- the actuator 131 essentially comprises an electric motor 1310 and an electronic control circuit 1311.
- the motor 1310 is preferably a DC motor.
- the electronic circuit 1311 controls the operation of the motor 1310 as a function of two input signals, namely, a C / R code / route mode control signal and a right / traffic traffic mode control signal. left TD / TG.
- the circuit 1311 is powered by a DC voltage V and outputs a control voltage VM whose polarity is variable so as to control the direction of rotation of the motor 1310.
- the Figs.1A, 1B and 3A shows the headlamp 1 in states corresponding to the right traffic traffic mode TD.
- the projector 1 is in the code illumination mode, in TD traffic. This state corresponds to the time interval t1 shown in FIG. Fig.2 .
- the control voltage VM is at 0 volts and the motor 1310 then exerts no torque on the cover piece 130.
- a return torque Cr is instead exerted by the spring 132 in the clockwise direction SH of such way that the cover 130D is held in abutment against the stop 133.
- the stop 133 is of the retractable type.
- a resilience property is imparted to the abutment 133 in such a manner as to make it retractable.
- the function of the stop 133 can be carried out so different by the skilled person. For example, in the form of a sliding stop actuated by an electromagnet.
- the stop 133 no longer fulfills its function of stopping rotation of the cover piece 130 when the torque Cc applied to the cover piece 130 is greater than a maximum threshold threshold Cm of determined value.
- a maximum threshold threshold Cm of determined value the mechanical force applied to the stop 133 by the cover 130D or 130G resting against it causes the stopper 133 to bend by elasticity. The bending of the stop 133 is then sufficient to release the piece of cover 130 and allow a continuation of the rotation thereof after crossing the stop 133.
- the restoring torque Cr due to the spring 132 is less than the maximum threshold torque Cm and the stop 133 then fully fulfills its function of stopping the rotation of the cover 130, by contacting the cover 130D against it (cf. 3A ).
- the Fig.1B shows the headlamp 1 in the road lighting mode, still in TD traffic. This state corresponds to the time interval t2 shown in FIG. Fig.2 .
- the control voltage VM then has a value -Vm capable of producing a rotation torque of the motor 1310 in the inverse clockwise direction SHi.
- the voltage VM -Vm is maintained in order to oppose the return torque Cr exerted by the spring 132 and to keep the cache piece 130 in the state shown in FIG. Fig.1B .
- the locked torque state occurs when the cover piece 130 comes into contact with the stop 133D in the TD traffic mode or the stop 133G in the TG traffic mode.
- the time interval t3 corresponds to the switching of the projector 1 to the left traffic mode TG.
- the motor 1310 then provides a mechanical torque in the clockwise direction SH which is added to the torque Cr exerted by the spring.
- the torque Cc applied to the cover piece 130 then takes a value which is greater than the torque Cm such that the retractable stop 133 flexes sufficiently and no longer impedes the rotation of the cover piece 130 which comes into the state shown in the Fig.1C .
- the voltage VM must retain the value + Vm for a time sufficient to allow crossing of the stop 133 by the two screens 130D and 130G, as shown in FIG. the Fig.1C .
- the voltage VM can be brought back to 0 Volt to come into the code illumination mode in TG traffic or maintained at + Vm to come in the road lighting mode in TG traffic.
- the projector 1 is shown in the code illumination mode, in TG traffic. This state corresponds to the time interval t4 shown in FIG. Fig.2 .
- the control voltage VM is at 0 volts and the motor 1310 then exerts no torque on the cover piece 130.
- the restoring torque Cr is instead exerted by the spring 132 in the reverse clockwise direction SHi of such that the cover 130G is held in abutment against the stop 133, more precisely against a contact face of the stop 133 which is opposite to that serving to support the cache 130D in the TD traffic mode.
- the abutment 133 operates here in the same manner as described above with respect to the TD traffic flow mode and is also retractable for switching from the traffic flow mode TG to the traffic circulation mode TD.
- the return torque Cr due to the spring 132 is therefore less than the maximum threshold torque Cm and the stop 133 fully fulfills its function of stopping the rotation of the cover piece 130, by contacting the cover 130G against the stop 133 (cf. . 3B ).
- the Fig.1d shows the headlamp 1 in road lighting mode, always in TG traffic. This state corresponds to the time interval t5 shown in FIG. Fig.2 .
- the control voltage VM then has a value + Vm able to produce a rotation torque of the motor 1310 in the clockwise direction SH.
- the voltage VM + Vm is maintained in order to oppose the return torque Cr exerted by the spring 132 and to keep the cache piece 130 in the state shown in FIG. Fig.1d .
- the limitation of the current of the motor 1310 is here also provided to prevent deterioration thereof in locked torque.
- the time interval t6 shown at Fig.2 corresponds to the switching of the projector 1 to traffic flow right TD, to return to the state of the time interval t1 or t2.
- the operation of this switching is similar to that described above for switching from TD mode to TG mode and will not be detailed here.
- the stops 133, 133D and 133G determine different angular positions of rotation stop caches.
- the retractable stop 133 with its opposite contact faces determine two angular positions, one for the 130D cover and one for the 130D cover, these angular positions corresponding to TD traffic mode code illumination and TG traffic mode code illumination.
- the fixed stops 133D and 133G determine two angular road illumination positions for the 130D and 130G caches, one for the TD traffic mode and the other for the TG traffic mode.
- the skilled person may not use a DC motor for the rotation of the cover piece 130 but use for example other types of actuator such as a stepper motor or an electromagnet.
- a stepper motor the presence of stops in accordance with the invention will bring a greater robustness of the angular positioning of the piece of cache, for example by allowing referencing in case of loss of step .
Landscapes
- 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0601296A FR2897415B1 (fr) | 2006-02-14 | 2006-02-14 | Projecteur d'eclairage pour vehicules automobiles. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1818602A2 EP1818602A2 (fr) | 2007-08-15 |
| EP1818602A3 EP1818602A3 (fr) | 2009-06-03 |
| EP1818602B1 true EP1818602B1 (fr) | 2015-03-25 |
Family
ID=37027760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07290136.6A Not-in-force EP1818602B1 (fr) | 2006-02-14 | 2007-02-01 | Projecteur d'éclairage pour véhicules automobiles |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7568825B2 (ja) |
| EP (1) | EP1818602B1 (ja) |
| JP (1) | JP2007220676A (ja) |
| FR (1) | FR2897415B1 (ja) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5074888B2 (ja) * | 2007-11-02 | 2012-11-14 | 株式会社小糸製作所 | 車両用ランプシステム |
| FR2936591B1 (fr) * | 2008-09-30 | 2014-09-12 | Valeo Vision Sas | Module optique pour vehicule automobile apte a eclairer selectivement une zone |
| JP2011181233A (ja) * | 2010-02-26 | 2011-09-15 | Koito Mfg Co Ltd | 車両用前照灯 |
| DE102010045435B4 (de) * | 2010-09-15 | 2019-10-10 | HELLA GmbH & Co. KGaA | Projektionsscheinwerfer für Fahrzeuge |
| DE202011005617U1 (de) * | 2011-04-27 | 2011-06-27 | Automotive Lighting Reutlingen GmbH, 72762 | Lichtmodul eines Kraftfahrzeugscheinwerfers |
| DE202012003108U1 (de) * | 2012-03-28 | 2013-01-29 | Automotive Lighting Reutlingen Gmbh | Projektionslichtmodul mit einer verstellbaren Blende |
| DE102012210157A1 (de) * | 2012-06-15 | 2013-12-19 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Scheinwerfers für ein Kraftfahrzeug |
| DE102019118590A1 (de) * | 2019-07-09 | 2021-01-14 | Automotive Lighting Reutlingen Gmbh | Lichtmodul eines Kraftfahrzeugscheinwerfers und Kraftfahrzeugscheinwerfer mit einem solchen Lichtmodul |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1389291A (en) * | 1920-01-08 | 1921-08-30 | Evan P Bone | Headlamp |
| US1658679A (en) * | 1927-06-04 | 1928-02-07 | Ben J Hill | Headlight dimmer |
| US1834542A (en) * | 1929-04-23 | 1931-12-01 | Karlebo Karl Birger | Dimming device for headlights for automobiles and the like |
| JPH0431169Y2 (ja) * | 1986-12-12 | 1992-07-27 | ||
| US4991063A (en) * | 1990-06-18 | 1991-02-05 | Eastman Kodak Company | Photographic flash apparatus |
| CA2051986C (en) * | 1990-10-04 | 1998-06-30 | Joseph F. Bader | Programmable emergency signalling device and system |
| JPH04293631A (ja) * | 1991-03-22 | 1992-10-19 | Stanley Electric Co Ltd | ４灯式前照灯 |
| JP2765643B2 (ja) * | 1992-06-03 | 1998-06-18 | 株式会社小糸製作所 | 投射型自動車用ヘッドランプ |
| DE4243174C2 (de) * | 1992-12-19 | 2002-06-27 | Bosch Gmbh Robert | Kraftfahrzeugscheinwerfer mit einer verstellbaren Blendenanordnung |
| FR2721686B1 (fr) * | 1994-06-28 | 1996-09-13 | Valeo Vision | Projecteur du type elliptique, comportant un cache basculant. |
| JPH0935504A (ja) * | 1995-07-17 | 1997-02-07 | Honda Motor Co Ltd | 車両用前照灯装置 |
| DE19708109A1 (de) * | 1997-02-28 | 1998-09-03 | Hella Kg Hueck & Co | Scheinwerfer für Fahrzeuge |
| US6116764A (en) * | 1997-09-06 | 2000-09-12 | Hella Kg Hueck & Co. | Headlight for vehicle |
| FR2769071B1 (fr) * | 1997-09-26 | 1999-12-03 | Valeo Vision | Projecteur de type elliptique a faisceau variable, notamment pour vehicule automobile |
| JP3967048B2 (ja) * | 1999-10-05 | 2007-08-29 | 株式会社小糸製作所 | 車両用前照灯 |
| JP2001143505A (ja) * | 1999-11-12 | 2001-05-25 | Stanley Electric Co Ltd | 車両用前照灯 |
| JP2001325816A (ja) * | 2000-05-15 | 2001-11-22 | Koito Mfg Co Ltd | 車両用前照灯 |
| FR2815310B1 (fr) * | 2000-10-12 | 2003-02-21 | Valeo Vision | Projecteur pour vehicule automobile a ecran d'occultation mobile |
| US6796696B2 (en) * | 2000-12-05 | 2004-09-28 | Stanley Electric Co., Ltd. | Vehicle light with movable reflector portion and shutter portion for selectively switching an illuminated area of light incident on a predetermined portion of the vehicle light during driving |
| JP3779173B2 (ja) * | 2001-04-24 | 2006-05-24 | 株式会社小糸製作所 | 車両用前照灯 |
| JP3923767B2 (ja) * | 2001-09-19 | 2007-06-06 | 株式会社小糸製作所 | 車両用前照灯 |
| FR2854941B1 (fr) * | 2003-05-16 | 2006-01-20 | Valeo Vision | Dispositif projecteur avec plaque pivotante, notamment pour vehicule automobile |
| DE10334553A1 (de) * | 2003-07-30 | 2005-06-16 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
| FR2866413B1 (fr) * | 2004-02-13 | 2006-06-30 | Valeo Vision | Projecteur elliptique equipe d'un ecran d'occultation en matiere transparente. |
| JP2005259549A (ja) * | 2004-03-12 | 2005-09-22 | Koito Mfg Co Ltd | 投射型自動車用ヘッドランプ |
| DE102004025228A1 (de) * | 2004-05-22 | 2005-12-08 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
| EP1605202B1 (fr) * | 2004-06-09 | 2016-10-05 | Valeo Vision | Dispositif projecteur multifonctions |
| US7140759B1 (en) * | 2005-02-01 | 2006-11-28 | Jen Mao Wang | Light beam adjusting device for vehicle |
-
2006
- 2006-02-14 FR FR0601296A patent/FR2897415B1/fr not_active Expired - Fee Related
-
2007
- 2007-02-01 EP EP07290136.6A patent/EP1818602B1/fr not_active Not-in-force
- 2007-02-12 US US11/673,633 patent/US7568825B2/en not_active Expired - Fee Related
- 2007-02-14 JP JP2007032803A patent/JP2007220676A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US7568825B2 (en) | 2009-08-04 |
| FR2897415B1 (fr) | 2008-04-11 |
| EP1818602A2 (fr) | 2007-08-15 |
| US20080180966A1 (en) | 2008-07-31 |
| FR2897415A1 (fr) | 2007-08-17 |
| JP2007220676A (ja) | 2007-08-30 |
| EP1818602A3 (fr) | 2009-06-03 |
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