CN101570155B

CN101570155B - Difunctional headlamp for motor vehicle

Info

Publication number: CN101570155B
Application number: CN2008100928397A
Authority: CN
Inventors: 让-吕克·梅朗纳德
Original assignee: Valeo Vision SAS
Current assignee: Valeo Vision SAS
Priority date: 2008-05-04
Filing date: 2008-05-04
Publication date: 2012-03-28
Anticipated expiration: 2028-05-04
Also published as: CN101570155A

Abstract

The invention discloses a difunctional headlamp for a motor vehicle, which achieves a first function and a second function. The first function refers to a beam with a light and shade dividing line, particularly a passing beam, and the second function refers to a beam of the second type, particularly a driving beam. The headlamp comprises an elliptical reflector (1), a light source (S), an optical device and a retractable shade, wherein the elliptical reflector comprises an inner focus and an outer focus on an optical axis; the light source is arranged near the inner focus; the optical device is arranged in front of the reflector and has a focus superposed or adjacent to the outer focus of the reflector; and the retractable shade (M) can occupy an active position for the beam with the light and shade dividing line and a retraction position for the beam of the second type; the shade located on the active position is produced on the light and shade dividing edge near the focus of the optical device; the shade (M) is provided with a reflection surface which is arranged at the lower part of the reflector on the retraction position and rotates forward for forming a beam of the second type.

Description

The Difunctional headlamp that is used for self-propelled vehicle

Technical field

The present invention relates to a kind of Difunctional headlamp that is used for self-propelled vehicle, first function that this head lamp is realized is for having the light beam of "cut-off"line (cut-off), and second function is the light beam of second type, especially driving beam.

Background technology

The head lamp of type involved in the present invention comprises:

-one elliptical reflector, in this elliptical reflector has on optical axis focus with outside focus,

-one is arranged near the light source the interior focus,

-one is arranged on the optics in parasite the place ahead, and its focus overlaps or is close to the outer focus of parasite,

-and a retractible blind; This retractible blind can occupy be used for the light and shade cutoff beam work the position be used for the retracted position of the second type light beam, the blind of position is created near the focus of said optics light and shade by the edge in action.

Summary of the invention

The object of the invention mainly provides a kind of Difunctional headlamp, said difunctional especially dipped beam/driving beam, and said Difunctional headlamp produces appropriate brightness and light quantity by the halogen-type light source, and is particularly useful for driving beam.Hope that also this difunctional module shows one's talent from existing module when keeping better simply structure through its principle and pattern.

According to the present invention, the blind of the head lamp of the type that limits above has a reflecting surface, and this reflecting surface is arranged on the bottom of parasite when retracted position, rotates forward, and helps to form the second type light beam.Preferably, this blind is made up of the part of parabolic complex surface.

Preferably, said head lamp comprises the complex surface that at least one is fixing in its underpart, and this complex surface is only operated when blind is positioned at retracted position, to help to form the second type light beam according to the light beam that passes the optics that is arranged on parasite the place ahead.

The advantage of said head lamp is that at least one complex surface at an upper portion thereof is arranged to beam reflection above lens contour, and helps to form the light beam and the second type light beam with "cut-off"line.

Blind can be withdrawn through rotating around a transverse horizontal axis perpendicular to optical axis.

The optics of head lamp can be formed by the convergent lens focus.These lens can be installed in one to have in the framework of lug of radial protrusion, and this protruding lug allows to be fixed on the shell, reserves a clearance envelope simultaneously, is used to make light beam between the profile of the profile of lens and shell, to pass through.Said lens can be limited two vertical lines sides.

The control of blind has the advantage through the stepper motor operation.The control of this stepper motor can have the function of so-called " express highway (motorway) ", so the "cut-off"line of passing beam compares the ten/several years that raise with common passing beam, especially between 2/10ths degree are spent with 6/10ths.

Said head lamp can comprise a parking lamp, the bottom in the clearance envelope of this parking lamp between the profile of the profile of lens and shell.

In making modification; The head lamp blind can be according to the location of at least one midway location between position and the retracted position in action; Compare at the "cut-off"line of the said light beam that produces during the position of working with said blind, this makes to produce to have than the light beam of blind at the high "cut-off"line of the said light beam "cut-off"line that produces during the position of working.Preferably, the move through stepper motor of blind from a position to another position realized.

Description of drawings

Except layout set forth above, the present invention has other layout of some, and hereinafter will be with reference to description of drawings one example, so that said other layout clearly to be discussed.In the accompanying drawings:

Fig. 1 is the schematic side transparent view of the head lamp under the dipped beam structure according to the present invention, and wherein blind is in the position of working;

Fig. 2 is the schematic front perspective view of the head lamp under the driving beam structure according to the present invention, and wherein blind is in retracted position;

Fig. 3 is that wherein blind is in the position of working that is used for passing beam through the schematic vertical cross-section of head lamp optical axis;

Fig. 4 is the vertical cross-section that is similar to Fig. 3 of head lamp, and wherein blind is in the retracted position that is used for driving beam; And

Fig. 5 a illustrates the modulation according to the head lamp light beam of the embodiment of the invention to Fig. 5 e.

The specific embodiment

Observe Fig. 1 and Fig. 2, can see a headlamp for vehicles P, this head lamp is designed to have difunctional, and a function is the light beam with "cut-off"line, i.e. passing beam, and another function is second type light beam, the i.e. driving beam.

Head lamp P comprises elliptical reflector 1; Perhaps more accurately; By the parasite that a series of continuous perhaps discontinuous surfaces form, the vertical bus of each all approaches ellipse in these surfaces, and in specification sheets and claims, abbreviates " elliptical reflector " as.When head lamp P was installed on the vehicle, the optical axis A-A level of approximation of parasite was parallel to the vertical of vehicle.Elliptical reflector 1 comprises: major part 1a, and these parts 1a is above the horizontal surface through optical axis A-A; With parts 1b, these parts 1b and extends so far away forward below said horizontal surface unlike parts 1a.Term " forward " and " backward " are understood according to the direction of propagation of light, and said light quilt is to front-reflection.

In parasite 1 has on optical axis A-A focal point F i with outside focal point F e.At interior focal point F i place or be provided with the light source S that schematically shows with any near it.Light source S can be an xenon lamp.Be provided with the optics of assembling the L shaped one-tenth of lens by one in parasite 1 the place ahead.The focus of lens L overlaps or is close to the outer focal point F e of parasite 1.

Retractible blind M occupies the position or shown in Fig. 2 and 4, be used for the retracted position of driving beam of working of the passing beam that shown in Fig. 1 and 3, is used to have "cut-off"line.

Blind M rotates around axis 2 (Fig. 3) is installed, and this axis 2 is positioned at said optical axis below, and is positioned at focal point F i the place ahead perpendicular to optical axis A-A.When blind M is in when working the position, its upper limb Mh is positioned near the focus and outer focal point F e of lens L, and forms the edge that the light beam light and shade is ended, this edge in horizontal surface near normal in optical axis A-A.

In the present invention, retractible blind is that the part by the reflective complex surface of a parabola forms, and this blind is positioned at the bottom of parasite 1 when retracted position (Fig. 2 and 4).

The statement of in specification sheets and claims, using " complex surface " or " parabolic complex surface " refer to the reflecting surface that is formed by a plurality of facets usually, and the especially vertical line of the bus of said a plurality of facets is near parabola.When the parabolic complex surface occupies when helping form the position of light beam, especially when blind M is positioned at retracted position, the focus of each facet overlap with bottom focus (the lower focal point) Fi of parasite 1 or near.

Head lamp also has at least one and is preferably a plurality of

complex reflex surface

3a, 3b, 3c that fix with respect to parasite 1 in the bottom, when blind M was positioned at retracted position (Fig. 4), said

complex reflex surface

3a, 3b, 3c helped to form driving beam.The focus of the complex surface 3a of bottom, 3b, 3c is positioned near the focal point F i or with this focus and overlaps.

Such as r5 (Fig. 4) by the complex surface 3a of bottom, 3b, 3c reflection and the light that is parallel to optical axis A-A annular space 4 in through below the lens L or sidepiece, this annular space 4 between the shell (not shown) of the profile of lens and maintenance head lamp around lens.Lens L is kept by framework 5 (Fig. 1), and the lug 6 of three radial protrusions is coupled on the shell said framework 5, and it is empty keeping space 4 simultaneously.

By parasite 1 and the reflective array that

complex surface

3a, 3b, 3c form one recess is arranged in the bottom, blind M ensconces in this recess when retracted position.At this retracted position, the reflecting surface of blind M rotates forward to help to form driving beam.The complex surface of blind M replenishes

complex surface

3a, 3b, 3c.

As shown in Figure 2, head lamp P can have at least one complex reflex surface 7 on top, and the top spaced radial of the forward edge of this reflecting surface 7 and lens is opened.The focus of complex surface 7 overlap with the bottom focal point F i of parasite 1 or near.No matter blind M is positioned at work position or retracted position, and surface 7 all allows the light that helps to form dipped beam and driving beam and is reflected to above the lens L.

The front elevation of lens L illustrates the profile that is formed by last arc, following arc and each vertical lines edge, side.

In annular space 4, be formed on above the lens L in the opening in the parasite 4 parking lamp V can be installed.

The advantage of the control of blind M is; Operate through the stepper motor (not shown); And has " express highway " function; Compare with the "cut-off"line of common passing beam, this function raises for ten/several years the "cut-off"line of passing beam, especially spends between 6/10ths degree 2/10ths.The series of steps that moves through motor of this "cut-off"line and realizing reduces top by edge Mh when working the position to be positioned at as blind M, this causes the "cut-off"line of light beam to raise.

Fig. 5 a shows the modulation of the head lamp light beam 10 of the present invention that obtains through the embodiment with stepper motor to 5e.Fig. 5 a shows as blind M and is in the common passing beam that being used for of obtaining when working the position go on the right side.This common passing beam has "cut-off"line 11 and sloping portion 12; This "cut-off"line 11 has level of approximation part 13; This level of approximation part 13 can avoid making chaufeur order road or this vehicle front that passes the vehicle that head lamp of the present invention is housed to dazzle, and said sloping portion 12 can make the roadside, right side be illuminated.Fig. 5 e shows the driving beam that when blind M is positioned at retracted position, obtains.It should be noted that and obtain two kinds of forms of dipped beam and driving beam, for example shown in Fig. 5 a and the 5e among the embodiment of only work there not being stepper motor position and two blind positions of retracted position.In being provided with the embodiment of stepper motor, blind will have one or more midways location between position and the retracted position in action.Through illustrative method, Fig. 5 b shows the form of the light beam that obtains at three midways location to 5d.Like this; In this example; Blind M moves the four-dimensieonal angle from the position of working to first interposition; Light beam thus from dipped beam formula light beam (Fig. 5 a) is changed to " express highway " formula light beam (Fig. 5 b) that has "cut-off"line, and wherein "cut-off"line 11 not only raises with respect to inclination "cut-off"line 12, and raises with respect to the light and shade barrier portion of the level of approximation that is positioned at these inclination "cut-off"line 12 left sides.Can move 8 degree location blind M from its position of working through making blind M, so that light beam 10 is become the form shown in Fig. 5 c, this form also is " express highway " formula light beam, but its "cut-off"line 11 is than high among Fig. 5 b.For further rising "cut-off"line 11, blind M can be brought to the 3rd interposition, and wherein blind moves 10 degree from its position of working; This has produced the light beam shown in Fig. 5 d.Certainly, the variation of light beam also can realize in the following manner, that is, move to the position of working from retracted position, thereby select the position of blind M to obtain correct light beam.The number of midway location changes according to embodiment.Equally, the mode that angle between position and the interposition changes with example that works provides.Equally, example illustrates and is used for the "cut-off"line that goes in the right side, but embodiment can be exchanged into and is used for left driving.For left driving, the dead line that illustrates will overturn with respect to the dead line that is used for going on the right side, thereby obtain along the symmetry of Fig. 5 a to the vertical axis shown in the 5e.

Blind M can be 80 ° the order of magnitude at the rotation amplitude between position and the driving beam position of working that is used for passing beam.

The operation of head lamp is described below.

When light source S opens, obtain first function, i.e. passing beam by the blind M that is positioned at the position of working shown in Fig. 1 or 3.Be reflected along light r1 from light source S and the light i1 (Fig. 3) that drops on elliptical reflector 1 top, this light r1 passes near outer focal point F e or this focus.Light r1 propagates downwards, after passing lens L, is parallel to optical axis A-A or has downward degree of dip.

Be reflected into r2 downwards from light source S and the light i2 that drops on parasite 1 top.Penetrate behind the lens L inclination that will keep down of this light.

From light source S and the light i3 under pointing to be reflected into the light r3 in the sensing by the bottom 1b of elliptical reflector, just the nuzzle up upper limb of blind of this light.After passing lens L, be parallel to optical axis A-A if this light r3 passes the focus of lens and penetrate, if perhaps this light r3 is crossing then be refracted on the downward direction with optical axis A-A at the lens focus rear.

The bottom 1b reflection of device and tackled by blind M with the crossing light of optical axis A-A in lens focus the place ahead is reflected; So that make them can not produce additional (parasitic) light, this additional light penetrates lens L in the upward direction and will above the "cut-off"line of light beam requirement, pass through.

Through making blind M by rotate about 80 ° and reduce forward and obtain the second driving beam function around axis 2.In a single day blind M reduces, and is located in the recess of elliptical reflector 1 and

complex surface

3a, 3b, 3c bottom.

The depression reflecting surface of blind M replenishes complex reflex surface,

bottom

3a, 3b, the 3c of head lamp P.

By oval parts 1a, 1b reflection, light r2, r3 pass lens L along light r2, r3 for light i2, i3.

Drop on such as the light under the sensing of i4 on the depression reflecting surface of blind M and along light r4 and be reflected, this light r4 also passes lens.

Drop on such as the light of i5 on one of them of

bottom complex surface

3a, 3b, 3c, and be reflected along light r5 from light source, this light r5 be basically parallel to optical axis A-A and below lens L through and do not reflected.

Compare with the light quantity that obtains through simple elliptical reflector, the light quantity that obtains in the driving beam position through retractible blind increases.

When light source S was halide torch, the present invention provided a kind of two halide torch modules (bihalogen module) with good driving beam flux, and this pair halide torch module is shown one's talent from present module through its principle and pattern.For driving beam, to compare with two halide torchs of standard, head lamp according to the present invention makes flux increase about 25%.

The location of the removable minute surface that is formed by blind M does not almost have injurious effects, because its most important function is the flux of compensation driving beam, mainly than traditional two halide torch modules more facility is provided.

Head lamp according to the present invention has very big flexibility, and to distribute the light quantity of driving beam according to the qualification of complex surface, through moving blind, the light of in conventional module, hiding is released, and is increased in the flux of passing beam simultaneously.

Claims

1. Difunctional headlamp that is used for self-propelled vehicle, said head lamp is realized first function and second function, and said first function is the light beam with "cut-off"line, and said second function is the second type light beam, and said head lamp comprises:

-one elliptical reflector, said elliptical reflector have on optical axis interior focus with outside focus,

-one is arranged near the light source the interior focus,

-and a retractible blind; Said retractible blind can occupy and be used for said work position and the retracted position that is used for the said second type light beam with light beam of "cut-off"line; The blind that is in the position of working produces near the light and shade of focus that is positioned at said optics and ends the edge

It is characterized in that said blind has a reflecting surface, the said reflecting surface that when retracted position, is arranged on said parasite bottom rotates forward, and helps to form the said second type light beam.

2. head lamp as claimed in claim 1, wherein said blind are that the part by the complex surface of parabolic constitutes.

3. head lamp as claimed in claim 1 comprises the complex surface that at least one is fixing in its underpart, said at least one fixing complex surface only helps to form the second type light beam through the light that passes said optics during at retracted position when blind.

4. head lamp as claimed in claim 1; Wherein said head lamp comprises at least one complex surface at an upper portion thereof; Said at least one complex surface is arranged to light is reflexed to optics profile top, and helps to form the light and shade cutoff beam and the second type light beam.

5. head lamp as claimed in claim 1, wherein said blind is withdrawn through winding perpendicular to the transverse horizontal axis rotation of optical axis.

6. head lamp as claimed in claim 1, the said optics of wherein said head lamp is formed by convergent lens.

7. head lamp as claimed in claim 6; Wherein said lens are installed in the framework of the lug with radial protrusion; The lug of said convexity allows to be fixed on the shell, reserves a clearance envelope simultaneously, and said clearance envelope is used for light to be passed through between the profile of said lens and said shell.

8. head lamp as claimed in claim 6, wherein said lens are limited by two vertical lines sides.

9. head lamp as claimed in claim 1, wherein said blind is through stepper motor control.

10. head lamp as claimed in claim 9; The control of wherein said stepper motor has " express highway " function, and said " express highway " function allows the "cut-off"line of said passing beam to compare the angle of rising between 2/10ths degree and 6/10ths degree with common passing beam.

11. head lamp as claimed in claim 7 comprises a parking lamp, said parking lamp is installed in the bottom in the clearance envelope between the profile of profile and said shell of said lens.

12. head lamp as claimed in claim 1; Wherein said blind can be positioned at least one midway location; Said at least one midway location works between position and the said retracted position said; Thereby compare at the said light beam "cut-off"line that forms during the position that works with blind, allow to form light beam with higher "cut-off"line.

13. head lamp as claimed in claim 1, wherein said light beam with "cut-off"line is a passing beam, and the said second type light beam is a driving beam.