专利摘要:
Lighting height corrector for an automobile reflector projector comprising an adjusting element (9) able to modify the inclination of said reflector (3), a threaded rod (10), a translational actuating means (7) of said threaded rod (10), said adjusting element (9) being movable in translation by screwing or unscrewing onto said threaded rod (10), said adjusting element (9) comprising for this purpose at least one thread (92) shaped to cooperate with the threading of said threaded rod (10), characterized in that the thread of said threaded rod (10) comprises, at its distal end, at least one stop (104a) shaped to limit the translation of the adjusting element (9) away from the threaded rod (10), by cooperation with said thread (92).
公开号:FR3031328A1
申请号:FR1550077
申请日:2015-01-06
公开日:2016-07-08
发明作者:Ludovic Toulisse;Hassan Koulouh
申请人:AML Systems SAS;
IPC主号:
专利说明:

[0001] The field of the present invention is that of motor vehicle light projectors and, more particularly, that of the attitude correctors for these projectors. SUMMARY OF THE INVENTION It is indeed necessary to adjust the height of the beam emitted by the projector so that, in the high beam position, it perfectly illuminates the road taken by the vehicle and, in the low beam, it does not dazzle. drivers of oncoming vehicles. For this it is important to be able to adapt the angle of the vehicle headlamps according to the attitude of the vehicle.
[0002] An example of a lighting projector according to the prior art is shown in FIG. 1. In general, a motor vehicle headlamp comprises a housing 1 closed by a protective glass 2. A lighting unit 5 is mounted inside the housing 1, facing the protective glass 2, to emit a light beam directed towards the road scene located at the front of the vehicle. This lighting unit comprises a light source 4 installed in front of a reflector 3. The reflector 3 serves to direct the beam emitted by the light source 4. Also, to orient the light beam and thus adjust the height of said beam, it is known to change the position of the reflector 3 inside the lighting unit 5. The position of the reflector 3 is generally modified by means of a lighting corrector 6. The lighting corrector 6 is an electromechanical device capable of driving the pivoting of the reflector 3. For this the lighting corrector 6 comprises an electrical module. This electrical module is generally equipped with a motor 7 and an electronic card. The electronic card is able to receive data relating to the attitude of the vehicle and to control the operation of the engine.
[0003] In normal use, the rotation of the motor causes the translation of a threaded rod on which is mounted a longitudinal sleeve 9 whose end has the shape of a sphere 90. The displacement of the sleeve 9 causes the displacement of the sphere 90 in a capsule 3a fixed on the reflector 3, for example in the upper part of the reflector. This displacement of the sphere 90 causes the reflector 3 to pivot about a pivot 3b which is situated, for example, in the lower part of this reflector.
[0004] In addition to the beam height correction device described above, which is actuated in normal use by the user or by an automatic headlamp leveling system of the headlamp, it is necessary to provide an adjustment device manual 8, which is accessible only by a mounting operator or a garage and which aims to define a reference height adjustment, from which the pitch correction device can act under the sole action of the electric motor. To this end, which meets a regulatory obligation in most countries, the longitudinal sleeve 9 is rotatably mounted on the threaded rod, in the manner of a screw-nut connection, so as to change its longitudinal position on this rod. For this purpose, the sleeve 9 has, at its end opposite the sphere 90, threads 92 (visible in FIG. 4) which fit into the thread of the threaded rod 10. The manual adjustment device comprises, as it appears in FIG. 2, a toothed wheel 81 which is carried by a guide sleeve 80 and a setting key 20. The sleeve 9 is positioned in the guide sleeve 80 and has guide ribs 91 which are aligned in its direction d actuation. These ribs slide in grooves which are formed on the inner face of the guide sleeve 80. The operator, acting on the key 20 whose end has teeth that engage the gear wheel 81, can rotate the sleeve of guidance 80 in one direction or the other. In doing so, it generates a rotation of the sleeve 9 which moves on the threaded rod 10, rotating with said sleeve and sliding on the internal grooves thereof. The threaded rod 10 being, this time, fixed in the absence of actuation by the electric motor 7, the rotation of the sleeve 9 causes its longitudinal displacement by screwing or unscrewing on the thread of the rod 10 and causes, correlatively, the displacement of the sphere 90.
[0005] Once the reference adjustment is obtained, the operator removes the key 20 and the lighting corrector 6 can then operate, under the action of the electric motor 7, around this reference position which has been given to the sleeve 9 One of the drawbacks encountered with the existing devices is that they have a predefined mechanical stroke and that exceeding this stroke, for example due to a mounting error or a carelessness of the operator, can lead to a separation of the sleeve 9 from the mechanism 8, and in particular with the threaded rod 10. However, it is important that the manual adjustment device remains operational, even if the end of its stroke is reached, in order to avoid disassembly for repair or, worse, scrapping the corrector.
[0006] The present invention aims to remedy these drawbacks by proposing a lighting corrector whose mechanism remains operational when reaching the end of travel by the reflector actuating sleeve, with in particular a possibility of return after the reached this extreme position. For this purpose, the subject of the invention is a lighting height corrector for a reflector automobile headlamp comprising a control element able to modify the inclination of said reflector, a threaded rod and means for actuating said threaded rod, said adjusting element being movable in translation by screwing or unscrewing on said threaded rod, said adjusting element comprising for this purpose at least one thread shaped to cooperate with the thread of said threaded rod, characterized in that the thread of said threaded rod comprises, at its distal end, at least one abutment shaped to limit the translation of the adjusting element away from the threaded rod, by cooperation with said net. The end stop placed at the end of the threading makes it possible to prevent the adjustment element from becoming detached from the threaded rod and thus from having to disassemble the corrector in the case of an excessive torque applied away from this adjustment element. In a particular embodiment, the corrector further comprises a manual adjustment sleeve surrounding the adjustment element, said adjustment element comprising at least one rib shaped to immobilize it in rotation relative to the sleeve by cooperation with guide means. in translation carried by said sleeve. Advantageously, the threaded rod has substantially the shape of a cylindrical bar, in which said threading is formed, which is extended by a substantially cylindrical stopper whose diameter is greater than that of the bottom of said thread, said stopper forming said abutment for the end distal of said thread. This bumper keeps the adjusting element in the thread thanks to the fact that its diameter always remains greater than that of the bottom of the thread. In a particular embodiment, said stop is formed by a first planar face at an angle to the plane perpendicular to the thread at its distal end, so as to form a reentrant female corner. This female wedge shape forms a roof for the end of the thread flowing in the thread and prevents it from passing over it. More particularly said first face makes an angle of between 5 and 300 with the plane perpendicular to the thread.
[0007] Advantageously the bumper comprises at least one notch extending circularly over the angular sector of which the diameter of the stopper is reduced relative to the diameter of the bumper off the notch. This notch is intended to facilitate the entry of a thread into the thread of the rod.
[0008] More advantageously, the notch is limited laterally by two plane faces aligned with an inclination with respect to an axial plane so that the angular aperture in the lower part of the stopper is smaller than that in the upper part. This configuration further enhances the entry of a thread into the thread of the rod. In a particular embodiment, the adjusting element is in the form of a hollow cylinder whose proximal portion bears at least one helical sector forming said net. The fact that the adjustment element can comprise only a helical sector facilitates its entry into a thread by deformation of said thread. Advantageously, said thread extends from the inside of the cylinder and comprises at at least one of its ends a second plane face forming an angle with the plane perpendicular to the thread, so as to form a protruding male corner. More advantageously, said second face makes an angle of between 5 and 300 with the plane perpendicular to the thread. Even more advantageously said net has a male corner protruding at each of its ends.
[0009] Preferably the angular aperture L2 of the thread is between the angular aperture Li in the lower part of the stopper and the angular aperture L3 in the upper part of said stopper. In a particular embodiment, said threaded rod comprises, at its proximal end, at least one second abutment limiting the translation of the adjusting element towards said corrector. Advantageously, the thread of the threaded rod ends against a third plane face forming an angle with the plane perpendicular to the thread, so as to form a female recess corner. More advantageously, said third face forms an angle of between 5 and 30 ° with the perpendicular plane. at the thread. The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly in the following detailed explanatory description of an embodiment of the invention given as a purely illustrative and non-limiting example, with reference to the accompanying schematic drawings.
[0010] In these drawings: FIG. 1, already described, is a diagrammatic sectional view of an automobile headlamp equipped with a lighting corrector; FIG. 2, already described also, is a detail view, from the front, of the illumination corrector of the projector of FIG. 1; FIG. 3 is a perspective view, from the front, of a threaded rod and a sheath for adjusting a lighting corrector according to one embodiment of the invention; FIG. 4 is a perspective view, from behind, of the threaded rod and the adjustment sleeve of FIG. 3, and FIG. 5 is a sectional view of the threaded rod and the adjustment sleeve of FIG. FIG. 6 is an axial sectional view of the sheath of FIG. 3; FIG. 7 is a radial sectional view of the sheath of FIG. 6; FIG. 8 is a front view of the threaded shank; of Figure 3, and - Figure 9 is a sectional view of the threaded rod of Figure 8, in two separate radial planes. Referring to Figures 3 and 4, one sees on the one hand the threaded rod 10 and the adjusting sheath 9 of a lighting corrector 6 according to the invention. The threaded rod comprises a substantially cylindrical base 101, from which extends a threaded cylindrical bar 102 which ends with a stop device 11 whose purpose is to form a stop for the sheath 9 when it reaches the end of its race. adjustment, outward. The bumper 11 has, for this, a substantially cylindrical shape which is part of the outer diameter of the bar 102. It has a first radial face 103a at its end which is located on the side where the adjusting sheath is located.
[0011] It also has a second substantially radial face 103b at its other end, which faces the thread of the bar 102, against which are positioned the threads 92 of the sleeve 9 during an extension phase of the mechanism 8. The nets 92 the sleeve 9 which circulate in the thread of the bar 102 find a stop 104a at the end of this thread, which prevents the sheath 9 to continue its translation, outwardly, beyond a certain extension, delimiting thus, downwardly, a setting range for the position of the reflector 3. The stopper 11 is, moreover, cut on its circumference by two notches 110, which are aligned, in a first approximation, in the longitudinal direction and which are opposite circumferentially to each other. They are intended to reduce the diameter of the stopper over part of its circumference, while maintaining a diameter greater than that of the bottom of the thread. The diameter reduction on the first part is intended to let the threads 92 of the adjusting sleeve 9 during its implementation on the threaded rod 10, as will be explained in detail below.
[0012] The bottom of these two notches takes on its upper part, that is to say the one by which the adjusting sheath 9 is introduced, a convergent conical shape in the direction of the axis of the threaded rod 10, precisely for the purpose. to facilitate this introduction. The bottom of the notch is then continued by a cylindrical shape whose diameter is slightly greater than that of the bottom of the thread of the bar 102.
[0013] As for the side walls of the notches 110, they are flat and aligned, not perfectly axially, but having a slight inclination with respect to an axial plane, so that the angular opening L1 in the lower part of the bumper, that is, that is to say at the second radial face 103b, is, at the notch, lower than that L3 in the upper part, that is to say at the first radial face 103a. This inclination generates a funnel shape, which completes the previous conical shape, and against which the threads 92 can be positioned and slide during the implantation of the adjusting sheath 9 on the threaded rod 10. The sleeve 9, meanwhile, in the form of a hollow cylinder 94, into which the threaded rod 10 can slide. It carries at its distal end, that is to say the one opposite to the threaded rod, the sphere 90, via a substantially biconical surface which connects the diameter of the outer cylinder 94 to that of the sphere. At the distal end of the outer cylinder there are typically, for example three radial stops 93, which extend radially outwardly with a flat face oriented away from the sphere. They form a stop for retracting the sheath 9, bearing against the distal end of the guide sleeve 80. They thus materialize the limit of the upward adjustment range of the reflector 3, when it is moved by the electric motor 7. Finally, the outer cylinder carries longitudinal ribs 91 over its entire length to serve as a sliding guide in its movement within the guide sleeve 80, under the action of rotation of the guide sleeve itself in the Manual presetting, as explained above. The end portion of the hollow cylinder 94 carries, at its proximal end (that is to say located on the side of the threaded rod 10) teeth in the form of helical segments, for example two in number, which extend towards and which form the threads 92 which cooperate with the thread of the bar 102 of the threaded rod 10. These two threads have a circular extension L2 and extend along a helix whose pitch and span correspond substantially at the pitch and depth of said thread. Referring now to FIG. 5, the threaded rod 10 and the sleeve 9 are respectively seen in plan view and in bottom view. It can be seen that the angular aperture L2 of each of the threads 92 of the end portion of sheath 9 is smaller than that L3 of the upper part of the stopper 11, but it is also slightly greater than that L1 of the lower part of this same stop. In this way, the threads 92 penetrate without problem in the upper part of the stop 11 and are guided towards the lower part of this stopper by its conical portion and the side walls of the corresponding notch 110. An axial pressure of the sleeve 9 against the stop 11 is sufficient, thanks to the elasticity of the threads 92, to make them pass through the lower part of the stopper and end up in the thread of the bar 102. The relative rotation of the sleeve 9 relative to the threaded rod 10 and is then possible by the displacement of the threads 92 in the bar 102. This then generates, by screwing or unscrewing on the threaded rod 10 the desired translation of the sleeve 9 and its sphere 90. Once that the sleeve 9 is put in place on the threaded rod 10, it is important that it remains there and that the unexpected application of a torque for the rotation of the threaded rod which would be excessive, can not cause the disconnection of the threads 92 of the thread of the bar 102, either at the proximal end or at the distal end thereof. For this first of all the length L2 of the threads 92 is, as has been said above, greater than that L1 of the notch 100 in its lower part. The longitudinal ends of the threads 92, protruding on either side of the angular opening of the notch 110, therefore remain locked below the second radial face 103b of the stopper 11. Then a corner and male wedge device female is positioned at the ends, on the one hand, nets 92 and, secondly, the thread of the bar 102, as shown in Figures 6 to 9. Figures 6 and 7 thus show a sheath 9 cut (Figure 6) in an axial plane which reveals a thread 92 which extends substantially radially from the inner wall of the sleeve. The net has, seen from the front, a parallelepipedal shape winding in a helix, with the exception of its two end portions whose thickness gradually tapers away from the inner wall of the sheath. The circular span of the net grows progressively away from the inner wall so as to form a protruding male corner 95 at each end (Figure 7). This male wedge is intended to fit into a female corner which is positioned at the end of the thread of the bar 102 as will be described in more detail in relation to FIGS. 8 and 9.
[0014] FIG. 7 shows a cross-section XX of the sheath 9 in a radial plane, at a thread 92. This thread extends from the inner wall of the sheath 9 over an angular sector of amplitude L2, and it presents at both ends of the wedge forms 95, the amplitude of the thread against the inner wall being less than its amplitude in the center of the sleeve. This thinning of the net at its ends allows, firstly, to have the flexibility to let it pass into the notch 110 of the threaded rod despite its greater amplitude and, secondly, to form a male wedge, protruding, 95 which can be inserted into a female corner positioned at the end of the thread of the bar 102.
[0015] FIG. 8 shows the threading of the threaded rod 10, which extends helically along the bar 102. This threading ends with two flat faces forming circular stops, a first stop 104a being located at the distal end of the bar, just below the second radial face 103b of the stop 11 and a second stop 104b being located at the proximal end, just above the base 101. These two stops are not stops oriented in an axial plane but they are nevertheless substantially parallel to the axial direction, their plane forming an angle with an axial plane. In this way they have a wedge shape as detailed in relation to Figure 9. Figure 9 shows two sections of the threaded rod 10, respectively YY and ZZ at the distal and proximal ends of the thread of the bar 102. The cut YY corresponds to the distal stop position 104a on the thread while the cut ZZ corresponds to the position of the proximal stop 104b. On either of the two sections we see that the stop zone which closes the thread has a diameter equal to that of the stopper 11. But, as indicated above, the face of this stop which closes the thread n ' is not oriented radially: it has a recessed female wedge shape 105, the angular amplitude of the abutment zone being reduced by passing from the diameter of the stopper to the outside, to a more restricted amplitude by joining the bottom of the thread . For reasons of holding the threads 92 in the thread of the bar 102 when the threads bear against one of the ends 104a or 104b, the angle α that the stop faces of the corners, both male 95 and female 105, make with the direction of the corresponding radial plane is preferably chosen between 5 and 30 °.
[0016] We will now describe the operation of a lighting corrector 6 according to the invention and in particular the implementation of its threaded rod 10 in its sheath 9 and the relative movements of these two parts. The threaded rod 10 is assumed already in place on the lighting corrector 6 and connected to the electric motor 7 for actuating the corrector in normal operation. The operator enters the sleeve 9 into the guide sleeve 80 and secures it in rotation with it by the cooperation of the ribs 91 of the sleeve with the internal grooves of the sleeve. It then positions this assembly around the threaded rod 10 by ensuring that the threads 92 of the sleeve are in front of the notches 110 formed in the stop 11 of the threaded rod 10. By a suitable axial support, the operator passes , in force, the threads 92 over the stop 11 and in particular the bottom of the notch 110, to end up in the distal portion of the thread of the bar 102, near the distal stop 104a. From this moment, any action in rotation of the guide sleeve 80, for example by a rotation triggered by the adjusting key 20, will trigger a rotation of the sleeve 9 relative to the threaded rod 10 and a variation, by screwing or unscrewing , relative positioning of these two parts. The threaded rod being fixed in rotation, the rotation of the key 20 and correlatively of the sleeve 80 will produce a longitudinal displacement of the sleeve 9 and its end sphere 90. The rotation of the key 20 thus allows the reflector 3 to be positioned in the position of reference sought.
[0017] It should be noted, as can be seen in FIG. 8, that the distal stop 104a is angularly offset on the threaded rod 10 with respect to the notch 110 so that when the threads 92 bear against the distal stop 104a, they are not positioned with respect to the cut and can not exit axially from the thread of the bar 102, in the image of what has been done, in an opposite direction, during the implantation of the sheath 9 on the threaded rod 10. The invention also provides for preventing a possible disconnection of the sleeve and the threaded rod in the case where an operator would exert too much force on the adjusting key while the threads 92 arrived on one of the end stops 104a or 104b of threading. If the faces of these abutments, as well as the lateral faces of the threads 92, were oriented along an axial plane, on the one hand the frontal cooperation of the two walls of the abutment and the net could generate matting effects on the surfaces when these come abruptly in contact with each other, and, secondly, there is a risk that the threads 92 deform and pass beyond the end stop 104a or 104b end of threading. In the case of unscrewing, the sleeve would disengage from the threaded rod, without it being possible to connect it by a screwing in the opposite direction of the adjustment key 20. The incident would then require a complete disassembly of the corrector. lighting, if not the same, a scrapping of the corrector in its entirety.
[0018] The invention overcomes this defect by the establishment of two corners, male 95 on the threads 92 of the sheath 9 and female 105 on the stops 104a and 104b end thread. These corners cooperate in a plane which is shifted circularly, between 5 and 300, with respect to an axial plane. At the end of the threading, the male wedge 95 thus fits under the female corner 105, and the roof function provided by the female wedge prevents the male wedge from jumping over and escaping from the thread. This function is provided both in a screwing direction of the sheath, by the proximal stop 104b that unscrewing thereof, by the distal stop 104a.
权利要求:
Claims (15)
[0001]
REVENDICATIONS1. Lighting height corrector for an automobile reflector projector comprising an adjusting element (9) able to modify the inclination of said reflector (3), a threaded rod (10) and a translational actuating means (7) of said threaded rod (10), said adjusting element (9) being movable in translation by screwing or unscrewing onto said threaded rod (10), said adjusting element (9) comprising for this purpose at least one thread (92) shaped to cooperate with the threading of said threaded rod (10), characterized in that the thread of said threaded rod (10) comprises, at its distal end, at least one stop (104a) shaped to limit the translation of the adjusting element (9) away from the threaded rod (10), by cooperation with said thread (92).
[0002]
2. Corrector according to claim 1 further comprising a manual adjustment sleeve (8) surrounding the adjustment element (9), said adjusting element (9) comprising at least one rib (91) shaped to immobilize it in rotation relative to the sleeve (8) by cooperation with translation guiding means carried by said sleeve.
[0003]
3. Corrector according to one of claims 1 or 2 wherein the threaded rod (10) has substantially the shape of a cylindrical bar (102), wherein is formed said thread, which is extended by a bumper (11) substantially cylindrical whose diameter is greater than that of the bottom of said thread, said stopper forming said stop (104a) at the distal end of said thread.
[0004]
4. Corrector according to claim 3 wherein said stop is formed by a first planar face (104a) at an angle to the plane perpendicular to the thread at its distal end, so as to form a female recess (105).
[0005]
5. Corrector according to claim 4 wherein said first face is at an angle between 5 and 30 ° with the plane perpendicular to the thread.
[0006]
6. Corrector according to one of claims 3 to 5 wherein the stopper (11) comprises at least one notch (110) extending circularly, on the angular sector of which the diameter of the stopper is reduced relative to the diameter of the stopper off the notch.
[0007]
7. Corrector according to claim 6 wherein the notch (110) is laterally limited by two flat faces aligned with an inclination relative to an axial plane so that the angular opening in the lower part of the bumper is smaller than that in upper part.
[0008]
8. Concealer according to one of claims 1 to 7 wherein the adjusting element has the shape of a hollow cylinder whose proximal portion carries at least one helical sector forming said net (92).
[0009]
The corrector according to claim 8 wherein said thread (92) extends from the inside of the barrel and has at at least one of its ends a second flat face at an angle to the plane perpendicular to the thread, so that forming a protruding male corner (95).
[0010]
The corrector of claim 9 wherein said second face is at an angle of between 5 and 300 with the plane perpendicular to the thread.
[0011]
11. Concealer according to claim 10 wherein said thread has a protruding male corner (95) at each of its ends.
[0012]
12. Concealer according to claim 7 and one of claims 8 to 11 in combination, wherein the angular aperture L2 of the thread (92) is between the angular opening L1 in the lower part of the bumper (11) and the angular opening L3 in the upper part of said stop.
[0013]
13. Corrector according to one of claims 1 to 12 wherein said threaded rod comprises, at its proximal end, at least a second stop (104b) limiting the translation of the adjusting element in relation to said corrector.
[0014]
The corrector of claim 13 wherein the thread of the threaded shank (10) terminates against a third planar face (104b) at an angle to the plane perpendicular to the thread, so as to form a reentrant female wedge (105).
[0015]
15. Corrector according to claim 14 wherein said third planar face is at an angle between 5 and 30 ° with the perperclicular plane to the thread.
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同族专利:
公开号 | 公开日
EP3242812B1|2022-02-09|
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WO2016110630A1|2016-07-14|
FR3031328B1|2018-06-01|
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US20170349086A1|2017-12-07|
EP3242812A1|2017-11-15|
JP2018500228A|2018-01-11|
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法律状态:
2015-12-31| PLFP| Fee payment|Year of fee payment: 2 |
2016-07-08| PLSC| Publication of the preliminary search report|Effective date: 20160708 |
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2019-01-31| PLFP| Fee payment|Year of fee payment: 5 |
2020-01-31| PLFP| Fee payment|Year of fee payment: 6 |
2021-01-28| PLFP| Fee payment|Year of fee payment: 7 |
2022-01-31| PLFP| Fee payment|Year of fee payment: 8 |
优先权:
申请号 | 申请日 | 专利标题
FR1550077A|FR3031328B1|2015-01-06|2015-01-06|AUTOMOBILE LIGHT PROJECTOR LIGHTING CORRECTING IMPROVED|
FR1550077|2015-01-06|FR1550077A| FR3031328B1|2015-01-06|2015-01-06|AUTOMOBILE LIGHT PROJECTOR LIGHTING CORRECTING IMPROVED|
US15/533,543| US10286832B2|2015-01-06|2015-12-30|Lighting corrector for motor vehicle headlamp with improved abutment|
EP15823724.8A| EP3242812B1|2015-01-06|2015-12-30|Lighting corrector for a motor-vehicle headlamp with improved abutment|
PCT/FR2015/053770| WO2016110630A1|2015-01-06|2015-12-30|Lighting corrector for a motor-vehicle headlamp with improved abutment|
JP2017530051A| JP6713463B2|2015-01-06|2015-12-30|Illumination corrector for vehicle headlights with improved abutment|
CN201580071431.XA| CN107107810B|2015-01-06|2015-12-30|Lighting corrector for a motor vehicle headlight with an improved stop|
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