JPH0313682B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a headlamp for an automobile having a reflecting mirror and a diffusion glass, wherein the diffusion glass is used when the headlamp is installed in an automobile. They are inclined at a predetermined angle with respect to a line parallel to the vehicle yaw axis when viewed from a plane perpendicular to the surface of the diffuser glass, and are arranged alternately in the horizontal direction in the optical path of the light beam sent from the reflector. The present invention relates to a headlamp for a motor vehicle, which has convex and concave conical lenses, and the main generatrix of these conical lenses is arranged parallel to a vehicle longitudinal axis plane extending in the vertical direction.

[Prior Art] A headlamp of this type is already known (German Patent Application No. 2 642 906). In this known headlamp, the axis of the conical lens is arranged parallel to the plane of the vehicle's longitudinal axis extending in the vertical direction, whereby the diffuser lens with the conical lens is inclined. The aim is to correct the distortion of the luminous flux caused by

[Problem to be solved by the invention] Since modern automobiles have a streamlined shape, the side parts of the front part are largely offset from the center part, and therefore, the side parts of the front part are arranged on the same plane as the car body. The diffuser lens is not only tilted with respect to the vehicle yaw axis (vertical line), but also pivoted relative to a line parallel to the vehicle transverse axis. However, when the diffuser lens is rotated in relation to the vehicle's transverse axis, the main generatrix of the conical lens also shifts, causing distortion of the luminous flux, causing the left and right end ranges of the bright and dark critical areas to move upward or downward. This causes it to curve downward. This is because in anti-glare headlights, the upper edge of the diffusion glass is pulled back significantly, so the left and right end ranges of the bright/dark critical area are curved downward, shortening the effective distance of illumination. In addition, in fog lights located below the headlights and tilted in the opposite direction to the headlights, the lower edge of the diffusion glass is pulled back, so
The left and right end areas of the bright/dark critical area are curved upwards, which dazzles oncoming vehicles. SUMMARY OF THE INVENTION The object of the present invention is therefore to eliminate these drawbacks and to make it possible for the light beam to always assume a predetermined shape, even if the diffuser glass is tilted and even swiveled.

[Means for Solving the Problems] According to the present invention which solves the above-mentioned problems, the diffusion glass is attached at a predetermined angle in relation to a line parallel to the horizontal axis of the vehicle when the headlight is installed in a vehicle. The main generatrices of the conical lens tilt and tilt the diffuser glass so that the main generatrices of the conical lens are parallel to the vertical plane of the vehicle's longitudinal axis when the headlights are installed. In the state before turning, only a predetermined angle calculated from the tilting angle and the turning angle,
It is already tilted with respect to the vehicle yaw axis.

[Effect] The headlamp according to the present invention, which is based on the above general concept, is such that even if the diffuser glass is tilted and rotated, the main generatrix of each conical lens is always parallel to the vertical plane of the longitudinal axis of the vehicle. It has the advantage that the light beam can take a predetermined shape because of its position.

Advantageous embodiments and improvements of the headlamp according to the invention are possible with the measures specified in the dependent claims. According to the embodiment described in claim 3, the fog light can uniformly illuminate the roadway without dazzling the driver of an oncoming vehicle.
By means of the embodiment of the headlamp according to claim 4, a headlamp for asymmetric anti-glare is obtained which has a predetermined brightness criticality. Claim 6
By virtue of the shape of the diffuser glass described in Section 1, unnecessary diffused light, which always occurs in backwardly or downwardly tilted diffuser glasses, is avoided. Additionally, damage to the press molds required during the glass plate manufacturing process is reduced. Designers and stylists involved in automobile manufacturing require a constant width of the diffuser over the entire diffuser glass, which is achieved by the embodiment of the headlamp according to claim 7. You can get it.

[Example] Next, the configuration of the present invention will be specifically described with respect to an example shown in the drawings.

In FIG. 1a, a right-hand anti-glare headlamp with a reflector 10 and an implied diffuser glass 11 is shown. This diffusion glass 11 is incorporated into a streamlined vehicle body (not shown). Diffusion glass 1
The surface of 1 is parallel to the plane line 1 of the vehicle yaw axis 13 when viewed in a longitudinal plane parallel to the vertical vehicle longitudinal axis plane 17.
2 by a predetermined angle 5, and is turned by a predetermined angle 6 with respect to a parallel line 14 of the vehicle transverse axis 15. These two axes 13,
15 and vehicle longitudinal axis plane 16 are each at right angles to one another. A vehicle longitudinal axis plane 17 extending in the vertical direction includes a vehicle yaw axis 13 and a vehicle longitudinal axis plane 16 . The angle 7 is the angle between the surface normal 24 on the surface of the diffusion glass 11 along the vertical plane 25 and the parallel line 12 to the vehicle yaw axis 13.

An optical member is integrally molded on the inner surface of the diffusion glass 11. That is, in the so-called wedge-shaped area 18 of the diffusion glass 11, a circular lens is formed, and in the area 21 adjacent to this wedge-shaped area 18 and in the upper and lower areas 22, 23, they are arranged alternately and parallel to each other. A convex conical lens 19 and a concave conical lens 20 having opposite conicities are formed. A line perpendicular to the surface of the diffusion glass 11 that is perpendicular to the surface of the diffusion glass (=normal line to the surface of the diffusion glass) and a line 12 parallel to the vehicle yaw axis 13 (see Figure 1b) form an angle of 90° - 7. are doing. The vertical surface 25 is a surface perpendicular (perpendicular) to the surface of the diffusion glass 11. This vertical surface 2
5 includes a line 12 that is perpendicular to the surface of the diffusion glass and parallel to the vehicle yaw axis 13. A line of intersection between this vertical plane 25 and the surface of the diffusion glass is a surface perpendicular line 24.

The diffuser glass for a headlamp according to an embodiment of the invention, illustrated in FIG. 2, is particularly suitable for use as an auxiliary headlamp.

Note that the headlight and the exposure light as an auxiliary headlight are basically the same in terms of light distribution characteristics. Therefore, both headlamps and fog lights as auxiliary headlamps are included in the scope of the present invention. However, consideration must be given to the fact that fog lights and headlights are installed in different locations in a vehicle. This means that the light is installed as low as possible in the front of the car.
The headlights, on the other hand, are installed higher up. Therefore, modern cars have a streamlined shape when driving low and low, so when viewed from the side of the car, the lower edge of the diffuser glass of a fog light is pulled in far to the rear. On the other hand, the top edge of the headlights is pulled far back. For this purpose, the conical lens of the diffuser glass is arranged so that the tip of the convex conical lens points upwards and the tip of the concave conical lens points downwards in fog lamps; In a headlamp, the tip of a convex conical lens faces downward, and the tip of a concave conical lens faces upward.

The diffusion glass section 31 in FIG. 2 corresponds to, for example, the section 21 of the diffusion glass 11 for an anti-glare headlamp shown in FIG. 1a, although the specific configuration is different. The diffusion glass section 31 has a convex or concave conical lens 1 on its inner surface.
9, 20, these conical lenses 19, 20 are alternately adjacent to each other and have opposite conicities. conical lens 1
A rectangular field 30 having a conical tip 32 and a conical portion 33 formed by 9 and 20, respectively, is shown in dashed lines. The diffusing glass section 31 is arranged obliquely within the rectangular field 30. That is, the upper edge 34 (and the lower edge parallel thereto) of the diffuser glass section 31 forms an angle 8 with the upper edge 35 of the rectangular field 30. This angle 8 is calculated by the following formula.

Angle 8 = arc tan [sin (angle 7) x tan (angle 6)] In this formula, angle 7 is the angle between the line perpendicular to the surface of the diffusion glass (the line perpendicular to the surface of the diffusion glass) and the vehicle yaw axis 13. The angle formed by the parallel line 12
This is the angle subtracted from 90°. In other words, angle 7 is
A vertical plane 25 perpendicular to the surface of the diffusion glass 11
Parallel line 1 of vehicle yaw axis 13 as seen in (normal plane)
2, that is, the surface normal 24 on the surface of the diffusion glass 11 along the vertical plane 25 and the parallel line 12 of the vehicle yaw axis 13.
is the angle formed by At angle 6, the diffusion glass is
This is the angle at which the vehicle is turned relative to the parallel line 14 of the transverse axis 15 of the vehicle. Further, the relationship between angle 5 and angle 7 is as follows. Angle 5 is the inclination angle of the diffuser glass 11 with respect to the parallel line 12 of the vehicle yaw axis 13 (vertical line) when viewed in a vertical plane parallel to the vertical vehicle longitudinal axis plane 17 as described above, that is, the vehicle longitudinal axis A parallel line 12 between the cutting line of the surface of the diffusion glass 11 cut along the plane 17 and the vehicle yaw axis 13
is the angle formed by Therefore, when the diffuser glass 11 is not rotated by the angle 6, the vertical plane 25 perpendicular to the surface of the diffuser glass 11 is parallel to the vehicle longitudinal axis plane 17, so that the angle 5=the angle 7. Angle 5 becomes slightly larger as swivel angle 6 increases, while angle 7 remains unchanged even if the diffuser glass 11 is swiveled by angle 6. In the position of the diffuser glass defined by angles 6 and 7, the diffuser glass section 31 shown in FIG.
5 by an angle of 8. That is, the principal generatrix of the conical lens is inclined by an angle of 8 with respect to the vehicle yaw axis 13. Diffusion glass category 3
The outer part of 1, ie the part of the rectangular field 30 other than the diffuser glass section 31, is a virtual part and is removed.

In FIG. 2, two main generatrices 39, 40 are drawn, and these two main generatrices 39, 40 are geometric lines connecting the lowest or highest points on the diffuser glass. According to the invention, all main busbars are arranged parallel to the vertical vehicle longitudinal axis plane 17 (see FIG. 1b) with the headlight installed in the motor vehicle.

The diffusing glass section 41 according to the second embodiment, shown in a cutaway view in FIG. They are located together and have opposite conicities. Unlike the diffusion glass according to the first embodiment shown in FIG. 2, here the conical lenses are 19, 20
are arranged at the same height position. This arrangement is equally spaced. That is, the width 42 of the diffuser glass member is constant in sections parallel to the diffuser glass edge 43 or 44. The combined conical portions 19', 20' are shown as a diffuser glass member. High-low line 45
is a microscopic representation of the convex portions and concave portions.

Figure 4 shows section 4 of the diffusion glass shown in Figure 3.
FIG. 1 is a schematic diagram showing a state in which all of the components 1 are combined into one diffuser glass. Diffusion glass 51 shown in FIG.
In the partial view of the inner side of
2,53 is shown. The transition of concave to convex conical lenses is indicated by lines 56, 57. The main busbars 39, 40 extend without interruption over the two sections 52, 53. This only shows that the height lines 55' overlap in the contact area of the two sections 52, 53.

[Brief explanation of the drawing]

FIG. 1a is a schematic perspective view of an anti-glare headlamp with a diffuser glass tilted with respect to the vehicle yaw axis and pivoted with respect to the vehicle transverse axis; FIG. FIG. 2 is a schematic diagram showing the axes, longitudinal axes and transverse axes; FIG. FIG. 1a is a schematic diagram showing a portion corresponding to the division of range 21 in the case of a diffusion glass for an anti-glare headlamp, and FIG. FIG. 4 is a schematic diagram showing a part of a diffusion glass according to another embodiment. FIG. 4 is a schematic diagram showing a state in which the diffusion glass sections shown in FIG. 3 are combined into one diffusion glass. 5, 6, 7, 8...Angle, 10...Reflector, 1
1... Diffusion glass, 12... Parallel line, 13... Vehicle yaw axis line, 14... Parallel line, 15... Vehicle horizontal axis line, 16... Vehicle longitudinal axis line, 17... Vehicle longitudinal axis plane, 18...... Wedge-shaped range, 19, 20... Conical lens, 19', 20'... Conical part, 2
1...Range, 22, 23...Area, 24...Diffusion glass surface perpendicular, 25...Vertical plane, 30...Rectangular field, 31...Diffusion glass division, 32...
Conical tip, 33... Conical portion, 34...
...Top edge of the diffusion glass 31, 35...Top edge of the rectangular field 30, 39, 40...Main bus line, 41
... Division, 42 ... Width, 43, 44 ... Diffusion glass edge, 45 ... Height line, 51 ... Diffusion glass,
52, 53... Division, 54, 55, 55'... High-low line, 56, 57... Line.

Claims (1)

[Scope of Claims] 1. A headlamp for an automobile having a reflector 10 and a diffuser glass 11, wherein the diffuser glass 11 is connected to the diffuser glass 1 when the headlamp is installed in an automobile.
It is inclined by a predetermined angle 7 with respect to the parallel line 12 of the vehicle yaw axis 13 when viewed from a plane 25 perpendicular to the surface of A vehicle longitudinal axis plane 17 has convex and concave conical lenses 19 and 20 arranged, and main generatrix lines 39 and 40 of these conical lenses 19 and 20 extend in the vertical direction.
In a headlamp for a motor vehicle, the diffuser glass 11 is arranged at a predetermined angle 6 in relation to a parallel line 14 to the transverse vehicle axis 15 when the headlamp is installed in a motor vehicle. The main generatrices 39, 40 of the conical lenses 19, 20 are additionally pivoted, with the headlight installed.
In the headlight state before tilting and pivoting the diffuser glass 11, these main generatrix lines 39, 40 are parallel to the vertical vehicle longitudinal axis plane 17.
A headlamp for an automobile, characterized in that it is tilted in advance with respect to a vehicle yaw axis 13 by a predetermined angle 8 calculated from the tilting angle 7 and the turning angle 6. 2 The angle 8 is: Angle 8 = arc tan [sin (angle 7) x tan (angle 6)]
In this formula, the angle 7 is the diffusion glass 11
2. A headlamp according to claim 1, wherein the angle is 90° minus the angle between a line perpendicular to the surface of the vehicle and a line 12 parallel to the vehicle yaw axis 13. 3. The diffusion glass is provided with at least two sections arranged one above the other, each section 52,
53 has conical lenses 19, 20,
A headlamp according to claim 1 or 2. 4. The conical lenses 19, 20 are at least
forming a horizontally extending end of the light-dark boundary;
The headlamp according to claim 1 or 2, which is arranged in the area 21 of the diffusion glass 11. 5. A wedge-shaped range is formed on the side of the range 21 that forms the horizontally extending end of the light-dark boundary, and upper and lower regions 22 and 23 are formed above and below the range 21. 5. A headlamp according to claim 4, wherein conical lenses 19, 20 are also arranged in the upper and/or lower regions 22, 23. 6. Claims 1 to 5, wherein convex and concave conical lenses 19, 20 are arranged in the diffusion glass 11, 51 alternately adjacent to each other and having conicities opposite to each other. The headlight described in any one of the preceding items. 7. The width 42 of all diffusing glass elements each consisting of one convex and one concave conical lens is
7. A headlamp according to claim 6, which is constant as measured in a plane parallel to the diffuser glass edges 43, 44. 8 Conical lenses 19, 20 and diffusion glass 1
1 and 51 are made of one member, the headlamp according to any one of claims 1 to 7.