CN102278685A

CN102278685A - Headlamp for vehicles

Info

Publication number: CN102278685A
Application number: CN2011101078565A
Authority: CN
Inventors: 约瑟夫·皮尔斯汀格
Original assignee: Zizala Lichtsysteme GmbH
Current assignee: ZKW Group GmbH
Priority date: 2010-04-22
Filing date: 2011-04-22
Publication date: 2011-12-14
Anticipated expiration: 2031-04-22
Also published as: EP2381164A3; EP2381164A2; EP2381164B1; AT509830B1; CN102278685B; AT509830A1

Abstract

The invention relates to a vehicular headlamp (1), which comprises a reflector (3), a lens (4) and a diaphragm shaft (11). The diaphragm shaft (11) which is located between the reflector (3) and the lens (4) can be adjusted on two or more rotary positions on a rotation axis (100) horizontally extending towards an optical axis (200). The diaphragm shaft (11) comprises a cover surface (12) which has at least one focal line (20, 20',21, 22, 23, 24) on each rotary position so as to generate lighting degree cutting lines (1001, 2001,3001, 4001, 5001, 6001, 7001, 1001') of light distributions (1000, 2000, 3000,4000, 5000, 6000, 7000, 1000'). The cover surface of the diaphragm shaft comprises grooves (30-35) at a region of the at least one focal line for dimmed light. The grooves run parallel to the rotation axis (100) of the diaphragm shaft (11). The adjacent grooves (30, 31; 31, 32; 32, 33; 33, 34; 34, 35) are directly limited together in a rotation direction and/or a circumferential direction. The adjacent grooves are separated from each other by common point edges (40-44).

Description

Vehicle head lamp

Technical field

The present invention relates to vehicle head lamp, comprise reflector, lens and diaphragm axle, described diaphragm axle is placed in also can be in the rotating shaft of laterally extending around level to optical axis between described reflector and the described lens, and in two or more a plurality of turned position, can regulate, the jacket surface of described diaphragm axle has at least one focal line to produce photodistributed "cut-off"line in each turned position, the jacket surface of described diaphragm axle comprises groove in this has the zone of focal line of at least one section light, the rotating shaft of described groove and described diaphragm axle is extended substantially abreast.

Background technology

The diaphragm axle that is used for producing the vehicle head lamp of different light images is known.Because the expansion of this diaphragm axle is also extended along the direction of light outlet, so have the planar diaphragm (diaphragm that thickness is little and thin) of insignificant expansion compares with the direction along light outlet, following problem can appear: the unfavorable upper area that can arrive the jacket surface of described diaphragm axle via the light of described reflector reflection, and be dispersed to therefrom the outside become unfavorable scattered beam, under some environment this can cause unallowed legally dazzle the eyes or light image in shading value.It is in the little film bobbin, because it also has certain expansion in the direction of light outlet that this problem also is present in diameter.

This problem especially appears in the photodistributed situation of cutting light.The photodistributed example that " cuts light " is the dipped beam of dipped beam, highway light, symmetry.These light are distributed in the regulation of ECE/SAE for example and are defined.

The problem of unfavorable scattered beam has been discussed, the diaphragm axle of having mentioned when it has shown beginning among U.S. Patent number 2009/0154187 A1.The diaphragm axle that shows in this article comprises groove, its by apart certain segment distance be distributed in the part of jacket surface of described diaphragm axle and at least one whole half (along the described rotating shaft finding) of the described diaphragm axle of extend through.

Yet,, can not remedy the problem of the disperse light in the light that cuts light distributes satisfactorily even noticed and use this diaphragm axle.

Summary of the invention

The purpose of this invention is to provide the diaphragm axle that has solved above-mentioned problem about the light scattering, obtain to conform with legal light value that cuts light and the light that does not have or almost do not have unfavorable dispersion with activation.

The vehicle head lamp of mentioning when using beginning is in the following manner reached this purpose: according to the present invention, the groove of adjacency, as along as described in the rotation or the circumferencial direction finding of diaphragm axle, directly be adjacent to each other and be separated from each other by common limit.

The big gradient of ether by described rib " seizure " and divided and be scattered back for example headlamp, so that can not produce the ray of unfavorable dispersion from the light of the described diaphragm axle of top arrival again, maybe it can be reduced in large quantities." desirable " light of described diaphragm axle arrives described diaphragm axle with the less gradient, it is absorbed by described diaphragm or can arrive the outside via described focal line, consequently will cut light (line (cut-off line) that terminator (cut-off limit), light and shade are ended) according to effective focal line on the optics in the current location of described diaphragm axle and project in the light image.Rib on the described jacket surface can not make that "cut-off"line is fully clearly cast out.In general, the actuator of the described diaphragm axle part that can not accurately described diaphragm axle to be placed to two edges between the rib always be described focal line.On the contrary, described diaphragm axle also can be placed in two centre positions (promptly not having the edge to be cast out by clear) between the edge in the optics optimum position.This causes a little fuzzy, "cut-off"line no longer fully clearly, anyway it more can vision protection, so this does not have any problem, on the other hand or even favourable.

Described axle can further have light absorbing black surface, can further reduce the light of dispersion by it.

Only have highly accurate and relatively costly actuator, just might be accurately with described diaphragm axle location, this there is no need fully, and only can allow headlamp unnecessarily more expensive.

According to the present invention, contiguous groove directly in abutting connection with and be separated from each other by the edge.Between groove and the groove in fact or almost can produce the ray of unfavorable dispersion without any jacket surface.

According to the above,, then especially favourable if described edge is the edge of point.

Should between contiguous groove, produce the edge of point as far as possible, promptly with transition (conversion) zone at slightly pointed edge, to produce the ray of minimum dispersion as far as possible.In practice, the edge that produces this point obviously has some restriction.Depend on material, can obtain more or less by the edge of rounding, thereby between described groove, provide by the transitional region of rounding.In this case, it is little should keeping radius separately as far as possible.

In specific embodiments of the invention, described diaphragm axle comprises jacket surface, and it is provided in the rotational angle range of qualification along the circumferential direction, and finding promptly as in rotational direction forms the focal line district of many focal lines that cut light; And a plurality of grooves, it is disposed in the scope of this rotational angle of described jacket surface.

In theory, under the condition that the actuator of described diaphragm axle is always accurately located, (point) focal line is just enough.Because this is unpractical, should be bigger slightly than the positioning accuracy of described actuator so place the rotational angle range of the focal line of described section light.

Because might produce other mistakes (except that the inaccuracy of location), so in order to ensure the reliability of process, it is favourable that the rotational angle range that has big configuration is provided.When using stepping motor, it may lose step and can be forevermore with for example 1 ° error in operation, until location next time (location is for example starting to carry out in the process of vehicle).Yet, because focal line of the same type is placed in the scope of enough big rotational angle, so thisly lose that to go on foot be no problem.

The minimum diameter of described axle is mainly limited by the height of the "cut-off"line under distance light.With regard to the concrete headlamp that has certain lens, for example exceed on the H-H 6 ° distance light for producing, need diameter to be at least the diaphragm axle of 12mm.Be necessary to increase the needed space of rotating shaft.When the diameter of the described shaft axis of supposition (rotating shaft) was 5mm, the diameter of described diaphragm axle reached about 17mm.

Required focal line is distributed on described diaphragm axle " sheath " surface.When six types focal line, each type all is provided with for example 60 ° of segmental arcs (under equally distributed situation) of described jacket surface.If a kind of focal line only uses little angular range, then on the sheath of described diaphragm axle, just have a large amount of dead sectors, this is disadvantageous.In practice, dissimilar focal lines only need be separated into following degree: it is not negative effect and produce for example fuzzy "cut-off"line mutually each other.The focal line that cuts light is with close to each other less than for example 60 ° (being segmental arc with 20 ° for example), and described part distance light has 90 ° or bigger segmental arc.

When those grooves relative to each other extend in parallel, can accomplish simple production and about the simple condition of optical computing.

Those grooves can also for example according to the focal line of crooked equally described lens, extend mainly along curve.Thereby obtain with the more best optical effect of the form of "cut-off"line.Yet production is very complicated.

Further provide those grooves be disposed in as along as described in rotating shaft being seen as described in the zone of diaphragm axle in the middle of substantially.

Described reflector " concentrates " light at zone line substantially, so that the ray of the strongest dispersion is derived from the zone line of described diaphragm axle substantially.Therefore, be not absolute demand at the mid portion of described diaphragm axle with the peripheral hardware groove, and be fully enough usually with the blackening of described axle in these zones.

With regard to the specific implementation of headlamp, the focal line that cuts light comprises:

*) straight line extend and with the first focal line section of shaft parallel, and

*) same straight line extend and with the second focal line section of shaft parallel,

Described two focal line sections connect via the straight focal line section of extending with respect to axes of rotation skew ground,

And the described first focal line section is more farther from the vertical range of rotating shaft than the described second focal line section from the vertical range of rotating shaft.

From the focal line section of extending with respect to axes of rotation skew ground, described groove extends a segment distance and enters the described first and/or second focal line section in this headlamp, be preferably and all enter two focal line sections.

The distance that puts in the focal line section roughly is equivalent to+/-10 ° angular range (measuring) from the central point of light source.This numerical value depends primarily on reflector.If the maximum of reflector is little, in the middle of promptly described light concentrated on consumingly, extending 10 ° also was enough certainly certainly.If the maximum area of reflector is very big, may stretch above 30 ° (for example 45 °) in both sides.

If described groove also passes completely through the focal line section that (penetrate) tilts, be preferred then for reducing the ray that disperses.

If described groove forms with section at least, promptly be provided with at least one section along its longitudinal extension (with shaft parallel), and this is to form by two opposed zones, described zone is extended toward each other with certain angle and preferably is arranged to the plane to small part, and is then favourable especially for the optical property of gained.Thereby can be preferably with from top light another plane, and the most at last in the described headlamp of its reflected back from a plane reflection of described groove to described groove.

Two planes of described groove can be crossing in the mode of acute angle each other, and promptly zone toward each other is arranged to flat sided straight to its intersecting area.Described " plane " generally include in process of production by the transitional region of rounding.It converges continuously each other.Therefore, it does not mainly relate to toward each other the plane of continuity, and relates to continue toward each other and part is arranged to the plane and it departs from the plane of flat shape in transitional region.The transition portion of point optically is preferred, but this is unimportant in function.From the angle of producing, having by the groove of the transitional region of rounding is (easier remove from mould) that is produced preferably.

If it is bigger with respect to the angle that jacket surface stretched than the back plane of this groove that groove is in the plane in the place ahead of direction of light outlet, is further favourable for production then.Especially back plane is being to being relevant aspect the production, and from the angle of optics, frontal plane should should become the maximum gradient as much as possible with respect to described jacket surface, destroys the light of maximum dispersions as far as possible by this mode.

This relates to the angle between the plane and tangent line surface shown on the described jacket surface, the intersecting lens that plane and described jacket surface shown in described tangent line surface is included in obtain when intersecting.

Angle between two planes of groove itself for example is approximately 45 ° in the focal line zone of highway lamp, for example be approximately 90 ° in the focal line zone of dipped beam.

In the zone of the jacket surface of described diaphragm axle, be placed with the focal line that cuts light with the form of highway light, the edge that in this zone, separates described two grooves with the first focal line section of described dipped beam and described rotating shaft between identical vertical range extension and be parallel to described rotating shaft.

In the zone of the jacket surface of described diaphragm axle, be placed with the focal line that cuts light with the form of dipped beam, the edge that in this zone, separates two grooves at least in some section and the vertical range between the described rotating shaft be farther than first focal line section of described dipped beam and the vertical range between the described rotating shaft.

In the specific embodiment of described diaphragm axle, two zones of the jacket surface of above-mentioned diaphragm axle are arranged in rotational direction, so that it can become highway light from dipped beam by rotating described diaphragm axle.

Extending if originally described edge is parallel to rotating shaft with the vertical range identical with the first focal line section of cutting light, is farther marginal portion via marginal portion protuberance to the vertical range with rotating shaft that tilts then, then is preferred.Sliver is limited by statutory regulations.

Further advantageously provide a plurality of edges and all have, and a plurality of edge is provided with than the first focal line section of cutting light from rotating shaft vertical range far away, in the zone of cutting light, avoid the light of unfavorable dispersion with activation from the identical vertical range of rotating shaft.Described diaphragm axle does not need special accurate localization.Angle between two edges is about as much as the positioning accuracy of used actuator.

Can also select bigger angle.In specific embodiment, it is approximately 5 °, and selects in such a way: when described diaphragm axle was accurately placed two grooves middle, light image was still acceptable.It is more accurate that described actuator can be placed.

Description of drawings

It is following that the present invention will be described in more detail with reference to accompanying drawing, wherein:

Fig. 1 has shown the three-dimensional front view according to the inclination of the projection system that has a diaphragm axle of the present invention;

Fig. 2 has shown the projection system among Fig. 1, has removed additional diaphragm;

Fig. 3 a has shown the stereogram of diaphragm axle according to the present invention when the dipped beam position;

Fig. 3 b has shown the diaphragm axle of Fig. 3 a that watches previously from the position of Fig. 3 a, and view direction is opposite with the direction of light outlet;

Fig. 3 c has shown that by example the dipped beam light of the projection system generation of using Fig. 1 distributes,

Fig. 4 a has shown the stereogram when diaphragm axle according to the present invention is in the position of sending highway light;

Fig. 4 b has shown the front view when described diaphragm axle is in the position of sending highway light;

Fig. 4 c has shown the distribution of highway light by example;

Fig. 5 a has shown that diaphragm axle according to the present invention " opens " high beam, i.e. stereogram when being converted to the centre position of distance light;

Fig. 5 b has shown the front view at the diaphragm axle of the position of Fig. 5 a;

Fig. 5 c has shown that the light when " opening " high beam distributes;

Fig. 5 d has shown the cross-sectional view of projection system, corrects by example and opening the mistake of high beam time in distributing shown in Fig. 5 c;

Fig. 5 e has shown the detailed view according to the diaphragm axle of the diagrammatic sketch of Fig. 5 d;

Fig. 6 a has shown the stereogram when described diaphragm axle is in the position of sending distance light;

Fig. 6 b has shown the front view of described diaphragm axle when the position of Fig. 6 a;

Fig. 6 c has shown the distribution of distance light by example;

Fig. 7 a has shown the stereogram of described diaphragm axle when the position of part distance light;

Fig. 7 b has shown the front view of described diaphragm axle when the position of Fig. 6 a;

Fig. 7 c has shown the distribution of part distance light by example;

Fig. 8 a has shown the stereogram when described diaphragm axle is in the dipped beam position of sending symmetry;

Fig. 8 b has shown the front view of described diaphragm axle when the position of Fig. 8 a;

Fig. 8 c has shown the symmetrical distribution of dipped beam by example;

Fig. 9 a has shown the sectional view of described diaphragm axle along the line A-A of Fig. 3 b;

Fig. 9 b has shown the sectional view of described diaphragm axle along the line B-B of Fig. 3 b;

Fig. 9 c has shown the sectional view of described diaphragm axle along the line C-C of Fig. 3 b;

Fig. 9 d has shown the front view according to diaphragm axle of the present invention, and this diaphragm axle has for having the lens that can pivot and produces the modification that the headlamp of the light that turns to is established;

Fig. 9 e has schematically shown two kinds of distributions of the dipped beam that has the light that the lens that pivoted turn to generation;

Figure 10 a has shown the detailed view according to diaphragm axle of the present invention, is in one section zone of the diaphragm axle of being responsible for the part distance light;

Figure 10 b has shown the zoomed-in view in the zone of Figure 10 a;

Figure 10 c has shown the photodistributed schematic diagram of part distance light;

Figure 10 d has shown the schematic diagram of the groove in the diaphragm axle of Figure 10 a, and

Figure 10 e-10i has shown the cross section of different grooves.

The specific embodiment

Fig. 1 has shown the vehicle head lamp (projection system) 1 that has diaphragm axle 11 according to of the present invention.Headlamp 1 comprises the lens 4 (seeing Fig. 5 d) that are attached in the lens carrier (not shown) for example.Can be thereby described lens carrier can pivot lens 4 around the longitudinal axis 300 around the longitudinal axis 300 pivots.Some are made 11 on diaphragm axle according to the present invention and revise also relevant with the projection system that has the lens that can not pivot shown herein.If revise especially or specially with can be relevant around the lens 4 that the longitudinal axis 300 pivots, then this understands and mention clearly in this article.

Headlamp 1 further comprises light source 4a and reflector 3, is installed in the adapter 2 at reflector described in the illustrated variant.All relevant portions all are fixed to this adapter 2, the drive unit 5 (for example stepper motor) that diaphragm axle 11 is rotated around its rotating shaft 100.Rotating shaft 100 is positioned at the center of described diaphragm axle, and promptly it is not eccentric.

The middle part of the coil of light source 4a or described light source is applied to first focus of described reflector.Diaphragm axle 11 is arranged to second focus that its focal line extends and passes described reflector.Lens 4 are arranged to second focus that its focus or focal line extend and pass described reflector.

Reference numeral 10 has been indicated the whole diaphragm arrangement in the headlamp 1, and outside the membrane removal bobbin 11, diaphragm arrangement also comprises (adding) diaphragm or shade 6.Described shade 6 is absorbed in the light that sends under the diaphragm axle 11.It is identical or higher slightly than it with the height of the rotating shaft 100 of described axle that the upper limb 6 ' of shade 6 preferably extends to.

Diaphragm axle 11 is fixed to adapter 2 rotationally.For this purpose, shown in the variant, adapter 2 has formed the part of cartridge housing 8, and shade 6 has formed the second portion 7 of this cartridge housing.The spherical bearing of establishing for the rotating shaft 100 of diaphragm axle 11 9 is accommodated in the described cartridge housing.

Also can mainly and directly for example first-class mode be installed in described bearing on the described adapter by clamping connection under the situation of any spherical bearing need not.By using suitable material can make described adapter reduce to minimum because of described axle rotates the wearing and tearing that cause.

Described axle can be made up of heat-resisting plastics, pottery, metal or its analog itself.

Fig. 2 has shown the layout of Fig. 1 once more, but has removed shade 6.

Diaphragm axle 11 can be conditioned in the turned position of horizontal rotating shaft 100 at two or more of laterally stretching to optical axis 200, and the jacket surface 12 of diaphragm axle 11 all has at least one focal line to produce photodistributed "cut-off"line in each turned position.

Fig. 3 a has shown the zone of jacket surface 12, and it has many focal lines 20 is the light distribution that cuts light (cut-off) of dipped beam with the generation form, and has the light distribution that many focal lines 21 are section light of highway light with the generation form.Further shown and produced the focal line 22 that distance light distributes.

Shown among Fig. 3 b that diaphragm axle 11 is placed on wherein one the position of the focal line 20 that dipped beam started, promptly this focal line produces described photodistributed "cut-off"line in light image.Fig. 3 c has shown that the corresponding dipped beam light that has "cut-off"line 1001 distributes 1000.

Fig. 4 a has shown that it is a little further rotated as the axle 11 among Fig. 3 a, thus now focal line 21 wherein one can start another section light light and distribute, highway light for example.Fig. 4 c has shown that the highway light that has the "cut-off"line 2001 that focal line 21 produced distributes 2000.

The diaphragm axle that is used for producing the vehicle head lamp of different light images is known.Because the expansion of this diaphragm axle is also extended along the direction of light outlet, so have the planar diaphragm (diaphragm that thickness is little and thin) of inappreciable expansion to compare with direction along light outlet, following problem can appear: the unfavorable upper area that can arrive the jacket surface of described diaphragm axle via the light of described reflector reflection, and dispersed the outside therefrom, become the light of unfavorable dispersion, under some environment this can cause law unallowed dazzle the eyes or light image in shading value.This problem also is present in the little film bobbin of diameter, because it has also showed certain expansion along the direction of light outlet.

This problem especially appears in the light distribution that cuts light.It for example is dipped beam (symmetry, asymmetric), highway light, city road light that the light that " cuts light " distributes.These light are distributed in the regulation of ECE/SAE for example and are defined.

The problem of the light of unfavorable dispersion has been discussed, described diaphragm axle when it has shown as beginning among U.S. Patent number 2009/0154187 A1.The diaphragm axle that shows in this article comprises groove, and it is distributed in the part of jacket surface of described diaphragm axle to each other, and also it extends across described diaphragm axle at least one complete half (along described rotating shaft as seen) apart from ground.Yet,, can not correct the problem of the light of the dispersion of the light that cuts light in distributing satisfactorily even noticed and use this diaphragm axle.

In order to address this problem, conform with the legal light value that cuts light and (almost) can not produce the light of unfavorable dispersion with activation, the jacket surface 12 of diaphragm axle 11 is included in the

interior groove

30,31,32,33,34,35 in zone of the

focal line

20,21 of at least one section light, described groove is parallel to the rotating shaft 100 of diaphragm axle 11 haply and extends

contiguous groove

30,31; 31,32; 32,33; 33,34; 34,35 as along the rotation of diaphragm axle 11 or circumferencial direction finding directly be adjacent to each other, and by

common edge

40,41,42,43,44 with separate.At Fig. 3 a and 4a and especially shown these grooves among Fig. 8 a, Fig. 9 a, 9b and 9c have at length shown these grooves.

Diaphragm axle 11 as shown in the figure comprises low-beam region, also comprises the zone of highway light.Therefore, if shown in two zones in be provided with rib, then be favourable.

The big gradient of ether by described rib " seizure " and divided and be scattered back for example headlamp, so that can not produce the ray of unfavorable dispersion from the light of the described diaphragm axle of top arrival again, maybe it can be reduced in large quantities (Fig. 9 a to 9c).Fig. 9 a has shown the light in the zone of the jacket surface that drops on described diaphragm axle, described zone is smooth, thereby do not comprise any groove be reflected space beyond the into described headlamp of light thereon, and the light that drops on described rib is drawn and is back in the described headlamp.

The light of " ideal " arrives described diaphragm axle with the less gradient, it is absorbed by described diaphragm or can arrive space outerpace via described focal line, consequently will cut light (line (cut-off line) that terminator (cut-off limit), light and shade are ended) according to the effective focal line of optics in the current location that is in described diaphragm axle and project in the light image.Rib on the described jacket surface can not make that "cut-off"line is fully clearly cast out.In general, the actuator of described diaphragm axle can't be the diaphragm axle part that accurately to be placed to two edges between the rib always be described focal line.Otherwise described diaphragm axle also can be positioned in two centre positions (promptly not having the edge clearly to be cast out) between the edge in the optics optimum position.This causes "cut-off"line fuzzy a little, clear no longer fully, anyway it more can vision protection, so this does not have any problem, on the other hand or even favourable.

Diaphragm axle 11 comprises jacket surface 12, it is arranged to along the circumferential direction, promptly as the rotation direction finding, (Fig. 8 a in the rotational angle range δ that limits, Fig. 9 a), it has the layout in the focal line district of the

focal line

20,21 that can form many sections light, and a plurality of groove is arranged in the described rotational angle range δ of jacket surface 12.

In theory, under the condition that the actuator of described diaphragm axle is always accurately located the diaphragm axle, only need (clearly) focal line.Because this is unpractical, so place the positioning accuracy that the rotational angle range of the focal line of described section light should be a bit larger tham described actuator.

Because other mistakes (except that the inaccuracy of location) might occur, so, provide that to have the rotational angle range that disposes greatlyyer be favourable in order to ensure the reliability of process.When using stepper motor, it may be lost the step in operation and 1 ° error can be arranged forevermore, for example until next location (for example positioning when starting vehicle).If but the focal line of same-type is placed in the enough big rotational angle range, this to lose the step just no problem.

Have only highly accurate and relatively costly actuator just might accurately described diaphragm axle be located.According to the above, this there is no need fully, and only can allow headlamp unnecessarily more expensive.Because described diaphragm axle has the focal line (promptly for example many focal lines of dipped beam or the like) of many adjacency of same type, so then only described diaphragm axle need be placed to wherein that a dipped beam focal line that is used for dipped beam is the position that is in starting if will produce dipped beam.

Needed focal line is distributed on described diaphragm axle " sheath " surface.When six types focal line, each type all is provided with one 60 ° arc section of described jacket surface for example (under equally distributed situation; Also have other distributions).If a kind of focal line only uses little angular range, then on the sheath of described diaphragm axle, just have a large amount of dead sectors, this is disadvantageous.Therefore, it is suitable that focal line uses 60 ° of maximum, so that obtain reliability in operation.

In Fig. 8 a, the angular range that cuts light is designated as δ.Its angular range δ 1 by the focal line that is placed with dipped beam forms with the scope δ 2 that is placed with the focal line of highway light.

Under distance light, the height of the line that the minimum diameter of described axle is mainly ended by light and shade is limited.With regard to the concrete headlamp that has a certain length,, just need diameter to be at least the diaphragm axle of 12mm for for example producing highly 6 ° distance light on H-H.Be necessary to increase the needed space of rotating shaft.When the diameter of the described shaft axis of supposition (rotating shaft (rotational shaft)) was 5mm, the diameter of described diaphragm axle reached about 17mm.

According to the present invention, contiguous groove directly in abutting connection with and with the edge with separate.Between groove and the groove in fact or almost can produce the ray of unfavorable dispersion without any jacket surface.

At length show this situation in Fig. 9 a to 9c once more, it has shown the sectional view according to the diaphragm axle 11 of Fig. 3 A-A along the line, B-B and C-C.

When edge the 40,41,42,43, the 44th, be favourable during the edge of point.Should between contiguous groove, produce the edge of point as far as possible, promptly with transition (conversion) zone at slightly pointed edge, to produce the ray of minimum dispersion as far as possible.In practice, the edge that produces this point has some restriction significantly.Depend on material, can obtain more or less by the edge of rounding, thereby can between described groove, provide by the transitional region of rounding.In this case, should attempt to make radius separately to keep tiny.

Edge 45 limits last groove 35.

When

groove

30,31,32,33,34,35 relative to each other extends abreast, as shown, just can obtain simple production and about the simple condition of optics seepage flow (optical percolation).

Described groove can also be mainly along curve, and for example the focal line according to crooked equally described lens extends.Thereby can obtain with the more best optical effect of the form of "cut-off"line.Yet production is very complicated.

Groove

30,31,32,33,34,35 preferably is disposed in the regional 12m of diaphragm axle 11 in the middle of substantially, as along rotating shaft 100 findings (seeing Fig. 8 b).Described reflector " is concentrated light " at zone line substantially, so that the ray of the strongest dispersion is derived from the zone line of described diaphragm axle substantially.Therefore, be not imperative at the mid portion of described diaphragm axle with the peripheral hardware groove, and these zones on the described axle are done black fully enough usually.

When going back, can see that the

focal line

20,21 that cuts light comprises that separately straight line extends and be parallel to the first focal line section 20a, the 21a of rotating shaft 100, and same straight line extends and is parallel to the second focal line section 20b, the 21b of rotating shaft 100 with reference to Fig. 3 b and 4b.Two section 20a, 20b; 21a, 21b connect via straight three warmers line segment 20c, the 21c that extend obliquely with respect to rotating shaft 100.The first focal line section 21a is longer from the vertical range of rotating shaft 100 than the second focal line section 20b from the vertical range of rotating shaft 100.

Start from the focal line section 20c that extends obliquely with respect to rotating shaft 100; 21c,

groove

30,31,32,33,34,, 35 extend a distance, d and enter the first and/or second focal line section 20a, 21a; 20b, 21b are preferably two focal line sections shown in entering.

Put in focal line section 20a, 20b; 21a, 21b are equivalent to+/-10 ° angular range (measuring from the central point of light source) haply apart from d.This numerical value depends primarily on reflector.If the maximum of reflector is little, in the middle of promptly described light can concentrate on consumingly, only extending 10 ° also was enough certainly certainly.If the maximum area of reflector is very big, may need to extend beyond 30 ° in both sides, for example 45 °.

If

groove

30,31,32,33,34,35 also inserts the focal line section 20c of inclination fully; 21c is best for reducing the ray that disperses then.

Fig. 5 d has shown and has passed the projection system according to the present invention vertical cross-section diagram parallel with optical axis that Fig. 5 e has shown the sectional view of the amplification of diaphragm axle 11.Fig. 5 e has at length shown the sectional view according to the groove of the present invention of Fig. 5 d.As shown, if

groove

30,31,32,33,34,35 forms with section at least, promptly be provided with at least one section along its longitudinal extension part (with shaft parallel), and this is to form by two zones opposite each other, described zone is extended toward each other with angle and preferably is arranged to plane ε 1, ε 2 to small part, and is then favourable especially for conceivable optical property.Thereby can be best with from top light another plane, and the most at last in the described headlamp of its reflected back from a plane reflection of described groove to described groove.

Two planes of described groove can be crossing in the mode of acute angle each other, and the zone of promptly shifting to each other is arranged to flat sided straight to its intersecting area.Described " plane " generally include in process of production by the transitional region of rounding.As clearly illustrating that it converges continuously each other among Fig. 5 e.Therefore, it does not mainly relate to toward each other the plane of continuity, and relates to continue toward each other and part is arranged to the plane and it departs from the plane of flat shape in transitional region.The transitional region of point optically is best, but this is inessential in function.The groove that has a transitional region of rounding can change places and produce (easier remove) from mould.

If the frontal plane ε 2 of

groove

30,31,32,33,34,35 is bigger with respect to the angle that jacket surface 12 extends than the back plane ε 1 of described groove,, be further favourable then for production as direction finding along light outlet.Especially, back plane ε 1 is relevant for producing, it should be in the gradient with respect to described sheath Cheng Gengxiao, and frontal plane ε 2 should become the maximum gradient as much as possible with respect to described jacket surface, comes to destroy as far as possible the light of maximum dispersions by this method.

This relates to this angle between the plane and tangent line surface shown on the described jacket surface, the intersecting lens that plane and described jacket surface shown in described tangent line surface is included in obtain when intersecting.

Angle between two planes of groove itself for example is approximately 45 ° in the focal line zone of highway light, for example be approximately in the focal line zone of dipped beam 90 ° (Fig. 5 e).

Go back again with reference to Fig. 4 a and 4b, can further recognize in the zone of jacket surface of described diaphragm axle of the focal line of placing with the form of highway light that cuts light, and the

edge

43,44 of separating

tank

33,34,35 with the first focal line section 21a of described dipped beam to the same vertical of rotating shaft 100 apart from extending and being parallel to rotating shaft 100.

Yet, therein in the zone of the jacket surface of the described diaphragm axle of the focal line of placing with the form of dipped beam that cuts light, the

edge

40,41,42 of separating

tank

30,31,32,33 is farther in the vertical range between some section and the rotating shaft 100 than first focal line section 20a of described dipped beam and the vertical range between the rotating shaft 100 at least, as especially showing well in Fig. 3 a and 3b and Fig. 8 a and Fig. 9 c.If originally

edge

40,41,42 extends to be parallel to rotating shaft 100 with the first focal line section 20a that cuts light from the identical vertical range of the vertical range of rotating shaft 100, be farther marginal portion (Fig. 9 c) via marginal portion protuberance to the vertical range that tilts then with rotating shaft 100.Sliver is defined by statutory regulations.

In specific embodiment shown in the described diaphragm axle, in rotational direction two zones of the jacket surface of above-mentioned diaphragm axle are arranged in tandem, so that might dipped beam be converted to highway light by rotating described diaphragm axle.

Therefore, the different distance at above-mentioned edge also causes the difference displacement (progressions) of the "cut-off"line 1001,2001 of dipped beam 1000 or highway light 2000.

From described figure, can see, it is identical

many edges

43,44 that the vertical range that is provided with from rotating shaft 100 is provided, and it is farther a plurality of

edges

40,41,42 than the first focal line section 20a, the 21a that cut light from the vertical range of rotating shaft 100 that the vertical range from rotating shaft 100 is provided, and avoids the light of unfavorable dispersion in the zone of cutting light with activation.Described diaphragm axle does not need special accurate localization.Article two, the angle between the edge (seeing Fig. 9 b) is about as much as the positioning accuracy of used actuator, and it is approximately 2 ° in the actuator that reality is used.

Can also select bigger angle.In specific embodiment, it is approximately 5 °, and selects by this way: when described diaphragm axle was accurately placed two grooves middle, light image was still acceptable.It is more accurate that described actuator can be placed.

Based on being in the distribute diaphragm axle 11 of (Fig. 3 c) of generation dipped beam light according to the position of Fig. 3 a and 3b, by being in according to the position of Fig. 4 a/4b, described axle rotates, just can reach the highway light distribution shown in Fig. 4 c.

If described diaphragm axle is gone to the position shown in Fig. 6 a and the 6b, described light distributes and be converted to the distance light light distribution 4000 that has "cut-off"line 4001 according to Fig. 6 c from the light distribution that cuts light (being that highway light distributes) under this situation.

Described section light is formed by the focal line 22 of described diaphragm axle, and it can clearly not throwed in light image under this situation, and this is desirable and can reaches by this way: the focal line 22 of diaphragm axle 11 is positioned under the focal line of described lens significantly.

The focal line 22 of distance light with respect to the vertical area of extending along the direction of light outlet be symmetry and extend with the form of recessed curved (concave bend).The focal line 22 of distance light from the vertical range of rotating shaft 100 further than the focal line 21 that cuts light from the vertical range of rotating shaft 100 for nearer.

The focal line 22 of distance light and the last item focal line 21 that cuts light are positioned in rotational direction to be separated from each other and surpass 90 °, usually even above 120 °.

Between the focal line 22 of this last item focal line 21 that cuts light light distribution 2000 and distance light light distribution 4000, described diaphragm axle does not have focal line and jacket surface, promptly between these focal lines, do not have or considerably less diaphragm material is only arranged on rotating shaft, in any case but its distance from the focal line of described lens is farther than the focal line of distance light and the spacing of distance light focal line.

Cut the focal line sheath zone of many this focal lines (or have) of light, the focal line of the focal line of dipped beam or highway light for example, by the focal line of distance light or focal line zone follow after.Distribute by making described diaphragm axle be converted to distance light light around its rotating shaft.Between the zone of cutting light and distance light zone, there is no and have the effective focal line of optics.Yet,, can significantly reduce the materials of described diaphragm axle in practice in order also to reduce the weight of described diaphragm axle.

When described diaphragm axle when the position of cutting light is torqued into the position of distance light, the focal line of described section light reverses to the rear towards described reflector and downward direction from its position of clearly being throwed.Therefore, more light can arrive space outerpace and "cut-off"line can clearly not throwed yet again.At last, described diaphragm axle is reversed to producing the photodistributed position of distance light, thereby wherein focal line 22 optically is effectively (Fig. 6 a, Fig. 6 b).Because it is more much lower than the focal line that cuts light that the focal line 22 of distance light is placed, thereby can not be in the focus of described lens or described reflector, thus described focal line can clearly be incident upon in the light image yet, yet Here it is desired effect.

Because the configuration of diaphragm axle when between section light light image and distance light light image, changing, a problem that is produced is at this system middle part, promptly as along the middle part finding of rotating shaft with respect to the diaphragm axle of its longitudinal extension, can be more via the light of light ratio in the frontier district that described diaphragm axle arrives.This is because the light that described reflector mainly will send concentrates on described zone line equally.Therefore, on fuzzy "cut-off"line, at the luminous point that the centre of light image obtains becoming clear, described luminous point has disturbed light image and has been considered to be unwelcome.

Shown described luminous point in Fig. 5 c, its Reference numeral is designated as 3002.

Do not appear in the light image or reduce its brightness greatly in order to ensure luminous point 3002, according to the invention provides protrusion 60, it is arranged on the zone line of diaphragm axle 11, as with respect to the longitudinal extension finding of diaphragm axle 11 along its rotating shaft 100, contiguous with the focal line 21 that cuts light, protrusion 60 from the focal line 11 that cuts light away from and extend out, and extend towards circumferencial direction or rotation direction haply along the diaphragm axle 11 of imaginary cylindrical sheath 50, imaginary cylindrical sheath 50 from the vertical range of rotating shaft 100 than the cylindrical sheath surface 50 of diaphragm axle 11 from the vertical range of rotating shaft 100 for nearer or equal, wherein this section focal line 21 of cutting light is placed in from the nearest distance of rotating shaft 100.

Fig. 3 a, 3b, 4a, 4b and Fig. 5 a and 5b have clearly illustrated described protrusion.Fig. 5 a and 5 has shown the centre position of diaphragm axle 11 in the conversion that cuts between light and the distance light, and protrusion 60 enters described light path.Fig. 5 d has shown the vertical cross-section diagram of the protrusion 60 of described headlamp, and Fig. 5 e has shown the zoomed-in view of described axle in the zone of protrusion 60, and it has also shown the connection with respect to

cylindrical sheath

50,51.

By providing according to protrusion 60 of the present invention, can cover the zone that bad luminous point 3002 takes place in the light image, promptly cover those light that penetrate and produce described luminous point from described reflector via the zone line of described diaphragm axle.

Diaphragm axle 11 covers even without also that Fig. 5 d is the shown light S1 of protrusion 60.Light S2 to S4 sends in higher position and can produce luminous point 3002, protrusion 60 stops described light to penetrate from headlamp, and penetrates more flatly but be not that crucial higher light S5 can penetrate via described axle without any problem ground in described light image.

Since with protrusion according to being arranged in especially as the present invention in the imaginary cylindrical sheath 50, and therefore be positioned under the focus (or focal line) of described lens, protrusion 60 can clearly not advanced in the light image by projection, so that it has reduced luminous point on the one hand widely or removed luminous point up hill and dale, and itself can not produce any unfavorable effect (as lens clearly) on the other hand.

Protrusion 60 is to be in its maximum light efficiency surface in the level of imaginary cylindrical sheath 50, and promptly having not a particle of in the protrusion 60 can be farther apart from rotating shaft 100 and imaginary cylindrical sheath 50.

Preferably, as clearly illustrating among Fig. 5 e, make protrusion 60 along the direction bending of rotating shaft 100 and leave imaginary cylindrical sheath 50 by along the circumferential direction extending from the focal line 21 that cuts light to leave.

The described rotating shaft of the region distance of described protrusion farthest, thereby described protrusion at utmost is to be positioned at imaginary cylindrical sheath, and when its along the circumferential direction towards the focal line of distance light when progressive, these zones can further reduce from the distance of described rotating shaft.This makes in the zone of the described unfavorable luminous point of light image when cutting light and become distance light progressive harmoniously.

In other words, when the center of calculating the described axle of its distance, when the front end of described protrusion (nose) 62 is nearer than rear end 61 (it is the end that faces the focal line that cuts light), then be favourable from the rotating shaft of described diaphragm axle.

Therefore, the bottom 61 of nose 60 be positioned to the full extent described lens focal line height or under it, and towards the axes of rotation skew of described diaphragm axle to its end 62.

In specific embodiment according to headlamp of the present invention, further provide protrusion 60 in the bottom 61 of its contiguous focal line 21 that cuts light than itself and bottom 61 edge opposed and that extend in parallel with the focal line 21 of section light 62 wideer (Fig. 5 a, 5b).

This embodiment has reflected the typical shape of unfavorable luminous point in the light image, its equally in the position lower zone than wideer in higher zone, its position.

The size of described luminous point and the size of corresponding described protrusion depend on the configuration of described reflector substantially.The general value that described protrusion extends out in the bottom for approximately+/-10 °, and " freedom " of described protrusion end in this case left/right side extends beyond approximately+/-4 °.So luminous point can be covered with identical to the full extent extension and cover.It is desirable to, in order fully luminous point to be covered, described protrusion should be same big or bigger slightly than it with described luminous point.The value that has proved described protrusion is fit to larger about 1 ° to 2 ° than the value of described luminous point.

In specific embodiments of the invention, the

wing

63,64 that bottom 61 is connected to its opposed edge 62 extends with straight line substantially.The described protrusion of this shape can be produced very simply and can carry out the calculating of optics aspect more simply.

If needed, the described wing also can have inside or bandy shape.

Described luminous point is symmetrical with respect to the optical axis of described system usually.Therefore when protrusion 60 is symmetrical with respect to the optical axis 200 of headlamp 1, will be suitable.

Must notice further that protrusion 60 is not located immediately at the focus of described lens, thereby can not throwed by " clearly ".

When further rotation diaphragm axle 11, described system cuts light from distance light light distribute 5000 the position of generation part distance light light that (Fig. 6 a to 6c) move to described diaphragm axle that distributes progressively with the "cut-off"line (Fig. 7 c) that has Reference numeral 5001.Fig. 7 a and 7b have shown the progress of the focal line 23 that produces this part distance light distribution.Depend on the turned position of described axle, the shadow region on the right can change in its scope.Provide two to have the horizontal dotted line (double-head arrow) of spacing to be explained.This is by vertical range different reach of the indivedual focal lines among the regional 12a of the jacket surface of described diaphragm axle with rotating shaft 100.

As shown in Fig. 7 a and 7b, diaphragm axle 11 comprises that one section jacket surface 12 is to provide the focal line of one or more generation part distance light.Each line 23 that produces the part distance light comprises the first straight focal line section 23a, and it is positioned at along the rotation of diaphragm axle 11 or circumferencial direction in for example columniform mode of bending, is disposed among first sheath zone 12a of diaphragm axle 11.Mention as mentioned, the indivedual focal lines among the regional 12a of the jacket surface of described diaphragm axle might be different with the vertical range of rotating shaft 100, and therefore the shadow region on the right in height can change.

The second straight focal line section is positioned at second sheath zone 12b of diaphragm axle 11, and described sheath zone is plane for example substantially, and 12b is nearer apart from rotating shaft 100 than crooked boot region 12a in second sheath zone.Two sheath zones 12a, 12b are connected to each other by discontinuous surperficial 12c.As shown in drawings, sheath zone 12b rises towards the edge of described diaphragm axle then.

Shown in the variant, noncontinuous surface 12c has the layout on plane.The advantage of the noncontinuous surface on plane is: by reversing described diaphragm axle, can improve or reduce the "cut-off"line (for this purpose, need be arranged in described jacket surface respectively with the focal line of differing heights) in described shadow region.Simultaneously, being converted to the distance light zone in the distribution of part distance light light is to remain unaffected, and promptly when described diaphragm axle is reversed, distributes constant at light described in this zone.And for above-mentioned reasons, noncontinuous surface 12c is preferably perpendicular to rotating shaft 100, as showing equally in Fig. 6 a and 6b.

For example in european patent number EP 2 157 362 A1, the diaphragm axle that comprises other objects and be used to produce one or more focal line of part distance light is known, but has crooked noncontinuous surface in this case.Under the situation of part distance light, can be blocked/cover in the photodistributed zone of vehicle or people present " normally " distance light.If travel because car for example distributes with distance light light because of the high speed on the highway, and car appears at the front of the runway of oneself, then only may cover the photodistributed zone at the vehicle place of described appearance.Can be transformed into dipped beam in other cases, and next optional in this situation.Similarly, under the situation that head-on traffic is arranged, the part distance light just can cover head-on residing this zone of traffic, and described photodistributed all the other zones then are illuminated according to the distance light light distribution of " normally ".

Distribute in order to obtain this light, as mentioned above, the diaphragm axle comprises at least two focal line sections or two sheath zones.In vertical direction, described two focal line sections are converged each other via discontinuous part.Therefore, because the diaphragm axle is along the extension, space on the direction of light outlet (spatial extension), so in described diaphragm axle, obtain noncontinuous surface unavoidablely, as known among european patent number 2 157 362 A1, described discontinuous surface can be arranged to planar fashion or bend mode, and this depends on the concrete structure of the focal line of part distance light.

Under the situation of the planar patch on plane, this discontinuity in the focal line of described light image is unchallenged.Yet, under the situation of described diaphragm axle, owing to the extension, space of described diaphragm axle obtains discontinuous surface, so in light image, obtain unfavorable effect.Particularly, unfavorable shaded effect appears in the photodistributed distance light of the described part distance light zone, especially takes place in the transfer process of vertical "cut-off"line during the conversion between described shadow region and distance light zone.

Fig. 7 c has shown the photodistributed desirable light image 5000 of the part distance light of "cut-off"line 5001, is not with any undesirable effect in described light image.Yet in fact, it mainly is unfavorable effect with near the form of the dash area of the vertical line of described "cut-off"line that discontinuous surface can be brought.Figure 10 c has shown that the distance light light of the part that has this effect distributes 7000.Shaded area during described light distributes has diagrammatically been showed the part of the light image 7000 that is covered.

The distance light light of part not being both among 7000 "cut-off"line 7001 ' and Fig. 7 c that distribute: said axle is placed on different a little turned positions, the shadow region on the right side be positioned at lower level and the shadow region further to the right and extension left.By the function that light is turned to of described headlamp, as by lens as described in pivoting, and make the shadow region further extend left.Yet this only occurs at the edge.The practical problem of the described hachure part shown in Figure 10 c mainly is also can occur in almost any position of part distance light.

According to the present invention,, now revise diaphragm axle 11, in noncontinuous surface 12c so that one or more depressions 70 to be provided in order to reduce or thoroughly to eliminate these unfavorable dash areas in the photodistributed distance light of the described part distance light zone.

The light that can not arrive space outerpace because these depressions 70 among the noncontinuous surface 12c, script can be blocked can arrive space outerpace in a controlled manner, thereby illuminates the zone that can be covered originally undesirablely.Figure 10 a and 10b have shown the noncontinuous surface 12c that has depression 70 in detail.

Therefore, when described at least one depression 70 is arranged to when the direction of light outlet is extended, especially a focal line that is placed on the part distance light when described diaphragm axle is that optics is effective, when to be its focal line be projected in the described light image in the turned position of (described "cut-off"line only clearly is incident upon in the zone that light covered) in the mode of "cut-off"line, light thereby can arrive in the mode of the best was wanted the zone that is illuminated in the space beyond the described headlamp.

Shown in Figure 10 a and 10b, when described one or more depressions 70 were arranged to point to the microscler continuous depression 70 of direction of described light outlet, this was especially favourable in the passing through of simple production and the unfavorable light of control.

Microscler depression is the sunk part of length greater than width.The described form that is arranged grooving 70 among the noncontinuous surface 12c that is recessed in.Edge between two grooves or surface are set at the height same with the remainder of described noncontinuous surface.

Preferably, at least one depression 70 extends back towards the direction towards that end 79 of reflector 3 from the front end 78 of the diaphragm axle 11 of back-reflection device 3.Enter the light of depression/groove thereby can pass described depression and penetrate from it, and arrive space (Figure 10 b) beyond the described headlamp in depression 70 end 78.

Have been noted that in specific embodiments of the invention when at least one depression 70 approximately extended to the middle M of noncontinuous surface 12c of diaphragm axle 11, as the direction finding along light outlet, this was preferred for illuminate the zone that is covered undesirablely.

As shown in Figure 10 b, straight line G, its at described rear portion towards intermediate restriction groove 70, be the plane of the rotating shaft 100 by passing diaphragm axle 11 and in the zone of the jacket surface 12a of bending the effective focal line of optics of part distance light intersect and get.Because described groove does not produce any light efficiency, so it needn't one fixes on after this line G.

In a specific embodiment of the present invention, microscler depression 70 has the cross section Q that is increasing, as along the direction finding of light outlet and as shown in for example Figure 10 d.Described groove for example becomes wideer towards its free end that faces described lens.

Can further provide the microscler depression 70 of at least two vicinities directly adjoining each other.In this case, described depression/groove is separated by the edge of point or by the conversion portion of rounding (peak of described conversion is positioned on the described noncontinuous surface or the part of described noncontinuous surface).Figure 10 e and 10f have shown the groove of the conversion portion at the edge that has this point.

Also can be extraly or provide the microscler depression 70 of at least two adjacency to leave the space each other alternatively.The depression of groove shape is separate with a segment distance, and this distance also can change along described groove.Usually, the surface under this situation between (under the situation of the noncontinuous surface on plane) described depression is the plane, or the condition on rounding limit is provided once more.

When cross section Q increased, the distance between two grooves can change with the length of described groove, sees Figure 10 d.

Figure 10 g has shown the border circular areas between groove and the groove 70, and Figure 10 h and 10i have shown the groove that has smooth conversion portion.

Further provide described microscler depression relative to each other to extend abreast in an embodiment of the present invention.Described depression can also be for example along the direction of described lens and separate.

In a variant of the present invention, the structure that is provided with different depth to the depression 70 of small part can also be provided, see Figure 10 f.

Can further provide microscler depression 70 on its length, as seen to have the different degree of depth.

For example, described groove can become darker along the direction towards described lens.The degree of depth of described groove can be than being shallow in described lens side in described reflector side.

Can also further provide different microscler depressions to have the different degree of depth.

Different grooves not necessarily must have the same degree of depth, but in this situation variant can be arranged.For example seen and ought be disposed in peak by the darkest groove that promptly it is arranged to the described rotating shaft of distance farthest when (Figure 10 f), then is favourable.In addition, the degree of depth of groove can change with its length significantly.

In vertical direction, 1/3rd to 2/3rds the zone of the 70 extend through noncontinuous surface 12c that cave at the height that is about as much as noncontinuous surface." highly " of described noncontinuous surface is the vertical range between the highest focal line among the second jacket surface 12b and the first jacket surface 12a.

For fear of in light distributes, producing any unfavorable illuminating effect, zone and the first jacket surface 12a and/or second jacket surface (12b) as depression 70 extend through discontinuous plan 12c, preferably with two jacket surfaces (12a, 12b) leave apart from the time, this has been proved to be favourable.

Described groove approximately extends up and down with same degree.Not that whole surface all is provided with groove.Preferably, described groove is approximately placed the described stage casing that is divided into three sections surface.If whole surface all is provided with groove, then can make light concentrate in the dark district, especially on the shadow region in Figure 10 c.

As mentioned above, part distance light light distributes and still can laterally move by the function that light is turned to (described lens or whole module pivot) of described headlamp.This has further enlarged envelop of function.Even can the height of overall optical image further be changed by the level control function of headlamp.

Fig. 8 a and 8b have shown the continuous straight focal line 24 of described diaphragm axle.Fig. 8 c has shown consequent light image 6000, and it has relevant "cut-off"line 6001.The light of symmetry shown in this article distributes and can be used to visitor's scheme or as city illumination (low speed).

Fig. 9 d has shown at last especially with 9a and has turned to the relevant further modification according to diaphragm axle 11 of the present invention of light with (dynamically).Described variant only shows in these accompanying drawings.It can not be presented on Fig. 9 b and the 9c.

In order to produce the light that dynamically turns to, lens 4 pivot around the longitudinal axis about 300, and the described longitudinal axis preferably extends and passes the focus of lens 4 or the focus of reflector 3.

Known the lens of feasible projection headlamp pivot around about certain longitudinal axis in order to produce the light that dynamically turns to, and described lens pivot according to steering angle light image is pivoted.

If diaphragm arrangement is placed in the light path, noticed especially in the position of the diaphragm arrangement that produces dipped beam or section light, because the pivot of described lens, common unfavorable effect can be created in the light image, this effect especially can see that more most light distribution meeting is covered in a side of head-on traffic.Headlamp for the vehicle of right-hand traffic especially makes lens left, just is meant that this unfavorable effect can make head-on traffic dazzle the eyes during light distributed when pivoting towards the direction of head-on traffic.

Fig. 9 e has shown the dipped beam light image 1000 ' ("cut-off"line 1001 ') that has shaded area 1002 ', and this shaded area can be owing to the pivot lens be illuminated, and this may make head-on traffic dazzle the eyes.

According to the present invention, diaphragm axle 11 comprises jacket surface 12, its be configured to have form two or more in the rotational angle range δ that limits along the circumferential direction, i.e. rotation direction is as can be seen cut the focal line district of the

focal line

20,21 of light; A focal line of described section light comprises that at least one side in head-on traffic produces the first focal line section 20a, 21a and at least one the second focal line section 20b, the 21b at the "cut-off"line of the side generation light image of this vehicle of the "cut-off"line of light image; Comprise at least one lifting parts 80 with described diaphragm axle in the zone of at least one the first focal line section 20a, 21a, its described first focal line section 20a, 21a with the

focal line

20,21 of the vicinity of cutting light is opposed.

Thereby on behalf of the modification focal line of the jacket surface of described diaphragm axle, lifting parts 80 change, and obtains the one or more more focal line 20 ' of the section of having 20a ', 20b ', 20c ' and 20d '.Though focal line section 20b ' and 20c ' are to extend with contiguous section 20b, 20c and the similar substantially mode of 21b, 21c, but the only partly similar section 20a of regional 20a ' or 21a extend, and follow regional 20a ' and be modified to the focal line section 20d ' that departs from lifting parts 80 zones.

The point of focal line 20d ' in the zone of lifting parts 80 is more farther apart from rotating shaft 100 than other points of the focal line of this focal line section, and when near the edge R of described diaphragm axle, the distance increase of these points and the rotating shaft of described diaphragm axle.

When being switched to a side that does not comprise any lifting parts 80, described lens (under the situation to the headlamp of right lateral vehicle, do not have lifting parts in the process that lens pivot, to have a negative impact left; Lifting parts is attached to the right side), the unfavorable light that lifting parts 80 can cause pivot covers, even consequently also obtain meeting the light image of statutory regulations when lens are pivoted.

When described axle is gone to described lifting parts when entering the position (another dipped beam position of rotating shaft) of light path, described shaded area can be cut light and not bright by illumination.

Because this interference occurs over just in the process that light turns to and depends on the pivoting angle of described lens (along with the pivoting angle of lens strengthens, the counter productive of light image also increases), so this section light dynamically takes place.In the less pivot of described lens, smaller portions need to be cut light.Therefore, the shaded area of this triangle is extended in more smooth mode, and does not need the lifting parts on the described axle is fully placed described light path.

Therefore, when lifting parts 80 just as Fig. 9 a and 9d as shown in by certain of the centre of distance diaphragm axle 11 apart from beginning, during edge R rise along vertical finding of diaphragm axle 11 towards diaphragm axle 11, this can be favourable.

Because described lifting parts rises towards described edge, so the pivoting angle that can compensate with described lens strengthens the interference that increases light image.

Lifting parts 80 or its focal line 20d ' no longer clearly are incident upon in the described light image.Because the focal line of described lens is not straight line but curve, so go to watch from the outside from described axle is far away more, it is throwed fuzzyly more.Described lifting parts also is like this.

With regard to the concrete headlamp that has the focal line that is used for asymmetric dipped beam, the light of a side of traffic head-on distributed that the first focal line section 20a, the 21a straight line that cut light extends and parallel with the rotating shaft 100 in the

focal line

20,21 of dipped beam, cut that the same straight line of the second focal line section 20b, the 21b of light extends and parallel with rotating shaft 100 in this vehicle one side, the first focal line section 20a is farther than the vertical range of the second focal line section 20b and rotating shaft 100.According to the present invention, lifting parts 80 is to be located at the described first focal line section.Establish lifting parts for described second section.

Be used for the headlamp of symmetrical dipped beam at another, cut the first focal line section of light and formed continuous straight line in the second focal line section that this vehicle one side is cut light in a side of head-on traffic, and with the shaft parallel of described diaphragm axle.In this headlamp, provide: in described two focal line sections, be provided with at least one lifting parts, so that in right lateral and left lateral traffic, can both be used for it to have and pivot the lower beam headlamp of lens to produce the light dynamically turn to.

The dipped beam of described symmetry is used to city illumination or tourism scheme.Especially for the tourism scheme, can all be provided with lifting parts in both sides.Can cover (forbidden) light of disturbing the people when on left side and right side bend, driving.

In a variant of the present invention, provide described lifting parts in the middle of described diaphragm axle, it is separated by to such an extent that be equivalent to 5 ° (Fig. 9 e) of the light image in the distribution of described light.This is the zone that obtains undesirable light efficiency in light image described in the process of described lens that pivots usually earlier, and this light efficiency can correspondingly be compensated by putting on this regional lifting parts.Described lifting parts can mainly start from the centre (obtaining described axle with respect to its centre along the rotating shaft longitudinal extension perpendicular to the plane and the described diaphragm axle of optical axis intersects) of described axle or can also start from position much outwards far away.

As shown, further providing lifting parts 80 is at the edge of diaphragm axle 11 R or borderline region from the ultimate range of rotating shaft 100.

When vehicle sailed bend into, described diaphragm axle is (dynamically) rotation further lentamente, so that described lifting parts further moves into light path at leisure.This can not take place suddenly, but according to the pivoting angle of described lens.When steering locking angle degree (about 15 ° to 20 °), at this moment whole lifting parts can and be at its peak in light path.

Therefore, being incident upon photodistributed edge or soon arriving before the photodistributed edge if described lifting parts is arranged to the point that it is the highest, then is suitable.For example, also described lifting parts can be able to be projected at most in the scope about 45 ° in the light distribution.

Except that the pivoting angle of described lens, the particulars of angle are specially relevant with the light image of being throwed.How the particulars of these angles are shown that described axle itself is to depend on employed lens in the light image.

For example, lifting parts 80 rises linearly to edge R.

Mainly importantly, the jacket surface of described diaphragm axle comprises that at least one no lifting parts " normally " focal line and at least one has the focal line of lifting parts to be used to produce the light image that is cut light in certain zone.Lifting parts only in the situation that lens have pivoted (head-on reverse traffic) be necessary, promptly when travelling on bend, the focal line that has lifting parts is started.When straight line is driven, do not need lifting parts, and because the photodistributed part of its requirement that described light image must be able to be met stops, so or even disturb the people's.

Owing to be difficult to produce the wall scroll focal line that has lifting parts, thus based on the production reason, now provide lifting parts 80 have along the circumferential direction spatial expansion or expansion part (Fig. 9 a).Therefore, lifting parts 80 is not arranged to the form of narrow focal line, but has expansion or expansion part along the rotation or the circumferencial direction of described axle.

This is not only relevant, also relevant with described light image with production.Usually, described spatial expansion spare can not realized with stepped lifting parts, but realize by along the circumferential direction continuing to rise to its peak (ridge).Therefore, in the process that described lens pivot " swimmingly " described lifting parts start, this is illustrated in the light distribution without any sudden change.

When lifting parts 80 is being passed on the plane that itself and rotating shaft 100 intersect vertically in the mode of protruding when crooked, this is consistent with above-mentioned statement.Even, when the sweep that protrudes is equivalent to one section circular arc, be especially favourable because actuator also can obtain similar result on the optics under non-pinpoint situation.Can easily produce circular arc equally.Yet described sweep is also oval.

In addition, also might be trapezoidal progressive.Its feasibility then can depend on the location accuracy of actuator.

Allow to trigger simply described diaphragm axle in a variant of the present invention, those points of lifting parts 80 are arranged in the highest point that passes the plane that lifting parts 80 and rotating shaft 100 intersect vertically, and form straight line in the projection via the horizontal plane of rotating shaft 100.

This means that it can be positioned on the straight line when the peak that intersects is connected to each other (ridge that it forms described lifting parts) along the longitudinal extension of described axle.This straight line is preferably parallel with the focal line that cuts light, especially preferred and described shaft parallel.

Can also provide those points of lifting parts 80 to be arranged in to pass the highest point on the plane that lifting parts 80 and rotating shaft 100 intersect vertically, form curve in projection via the horizontal plane of rotating shaft 100.

In specific embodiments of the invention, further provide the whole first focal line section of described lifting parts extend through or in the headlamp of right lateral and left lateral vehicle, extend through whole piece focal line (not shown).

Therefore, in this case, from the centre of described diaphragm axle (as finding longitudinally) to as described in the distance that begins of lifting parts be zero.

In a variant of the present invention, all peaks of described lifting parts all are identical with the distance of the rotating shaft 100 of diaphragm axle 11.Therefore, described lifting parts is arranged to straight line substantially, one or several the straight focal line that promptly cuts light place compare other " normally " of cutting light of when driving point-blank, being started focal line for height, promptly farther from described rotating shaft.

The accurate shape of lifting parts especially depends on the design of reflector.Stepped lifting parts also is possible when originally described lifting parts when the centre of described axle is outwards seen rises and then descend maybe.

The shown headlamp of this paper meets for example legal provisions of ECE (Europe), SAE (U.S., Canada) and JIS (Japan) etc.

Claims

1. vehicle head lamp (1), comprise reflector (3), lens (4) and diaphragm axle (11), diaphragm axle (11) is placed in also can be in the rotating shaft (100) of laterally extending around level to optical axis (200) between reflector (3) and the lens (4), and in two or more a plurality of turned position, can regulate, the jacket surface (12) of diaphragm axle (11) has at least one focal line (20 in each turned position, 20 ', 21,22,23,24) distribute (1000 to produce light, 2000,3000,4000,5000,6000,7000,1000 ') "cut-off"line (1001,2001,3001,4001,5001,6001,7001,1001 '), the jacket surface (12) of diaphragm axle (11) has the focal line (20 of at least one section light at this, 21) comprise groove (30 in the zone, 31,32,33,34,35), the rotating shaft (100) of described groove and diaphragm axle (11) is extended substantially abreast

It is characterized in that

The groove of adjacency (30,31; 31,32; 32,33; 33,34; 34,35) along the rotation of diaphragm axle (11) or circumferencial direction directly is adjacent to each other and separate by common edge (40,41,42,43,44).

2. headlamp according to claim 1 is characterized in that edge (40,41,42,43,44) is the edge of point.

3. headlamp according to claim 1 and 2, it is characterized in that diaphragm axle (11) comprises jacket surface (12), it is provided in the rotational angle range (δ) of qualification along the circumferential direction, finding promptly as in rotational direction forms the focal line district of many focal lines (20,20 ', 21) that cut light; And described a plurality of groove is disposed in this rotational angle range (δ) of described jacket surface (12).

4. according to described headlamp of claim wherein in the claim 1 to 3, it is characterized in that groove (30,31,32,33,34,35) relative to each other extends in parallel.

5. according to described headlamp of claim wherein in the claim 1 to 4, it is characterized in that groove (30,31,32,33,34,35) be disposed in as along as described in the zone (12m) of the being seen diaphragm axle of rotating shaft (11) in the middle of substantially.

6. according to described headlamp of claim wherein in the claim 1 to 5, it is characterized in that the focal line that cuts light comprises:

*) straight line extend and with the first focal line section (20a, 21a) of shaft parallel, and

*) same straight line extend and with the second focal line section (20b, 21b) of shaft parallel,

These two focal line sections (20a, 20b; 21a, 21b) via connecting obliquely and with linearly extended three warmers line segment (20c, 21c) with respect to rotating shaft (100),

And the described first focal line section (20a) is far away from the vertical range of rotating shaft (100) than the described second focal line section (20b) from the vertical range of rotating shaft (100).

7. headlamp according to claim 6, it is characterized in that from the focal line section (20c, 21c) of extending obliquely groove (30,31,32,33,34,35) extends a segment distance (d) and enters first and/or second focal line section (20a, the 21a with respect to rotating shaft (100); 20b, 21b).

8. headlamp according to claim 7 is characterized in that putting in focal line section (20a, 21a; 20b, 21b) distance (d) roughly be equivalent to measure+/-10 ° angular range from the central point of light source.

9. according to claim 7 or 8 described headlamps, it is characterized in that groove (30,31,32,33,34,35) penetrates the focal line section (20c of inclination fully; 21c).

10. according to described headlamp of claim wherein in the claim 1 to 9, it is characterized in that groove (30,31,32,33,34,35) forms with section at least, and this is to form by two opposed zones, and described zone is extended toward each other with certain angle (γ) and preferably is arranged to plane (ε 1, ε 2) to small part.

11. headlamp according to claim 10, it is bigger with respect to the angle that jacket surface (12) is stretched than the back plane (ε 1) of those grooves to it is characterized in that groove (30,31,32,33,34,35) is in the plane (ε 2) in the place ahead of light outlet direction.

12. according to described headlamp of claim wherein in the claim 1 to 11, the edge (43,44) that it is characterized in that separating two grooves (33,34,35) with the first focal line section (21a) of described dipped beam and rotating shaft (100) between identical vertical range extend and be parallel to rotating shaft (100).

13. according to described headlamp of claim wherein in the claim 1 to 12, the edge (40,41,42) that it is characterized in that separating two grooves (30,31,32,33) at least in some section and the vertical range between the rotating shaft (100) be farther than first focal line section (20a) of described dipped beam and the vertical range between the rotating shaft (100).

14. headlamp according to claim 13, it is characterized in that edge (40,41,42) originally is parallel to rotating shaft (100) with the vertical range identical with the first focal line section (20a) of cutting light and extends, the vertical range that is raised up to rotating shaft (100) via the edge section that tilts is farther edge section then.

15. according to described headlamp of claim wherein in the claim 12 to 14, it is characterized in that a plurality of edges (43,44) all have from the identical vertical range of rotating shaft (100), and a plurality of edge (40,41,42) are provided with than the first focal line section (20a, 21a) of cutting light apart from rotating shaft (100) vertical range far away.