JPS62243239A - Head light lamp for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a headlamp that is attached to a vehicle such as a private car.

[Conventional Example 1] As this type of two-divided anti-01 mirror, one having a structure disclosed in Japanese Utility Model Application Publication No. 118201/1983 filed by the same applicant is known. In this known reflecting mirror, the length relationship and arrangement of the running filament and the passing filament used are clearly defined, and in particular, the running filament is 0.5 times smaller than the passing filament. ~1.5 am+ long, and of both filaments, the traveling filament is at a position perpendicular to the vertical line, and the passing filament is swung on the central axis of the paraboloid or with a constant width. It has been revealed.

[Problems to be Solved by the Invention] In the conventional example, when an attempt is made to form a headlamp for right-hand traffic and left-hand traffic by locating the running filament perpendicularly to the vertical line, the headlamp for oncoming traffic cannot be detected. Another problem is that it is difficult to adjust the light distribution pattern so as not to generate dazzling light.

Means for Solving the L Problem] As a specific means for solving the above problem, the present invention provides a structure in which the traveling filament and the passing filament are arranged substantially parallel to the center axis of the paraboloid of the reflector. In a vehicle headlamp in which a filament for passing each other is disposed above a filament for running, the reflector is divided into an upper reflector and a lower reflector at or near the center axis of the paraboloid, and both of the reflectors are divided into an upper reflector and a lower reflector. The reflector is formed with different focal positions, and the inner corners of both focal positions are set to be longer than the length of the passing filament, and between the two focal points, the two filaments are moved to the left and right across a vertical line, and to the center. The running filaments are arranged above and below with the axis in between, and the running filaments are parallel to the vertical line and within a maximum range of 60° of the angle θ formed by a line passing through the passing filament with the center of the passing filament as its apex. The present invention provides a headlamp for a vehicle, which is characterized in that the headlamp is positioned at the right side of the vehicle, and the irradiated light can be directed to correspond to either right-hand traffic or left-hand traffic, and the light distribution is improved. It is.

[Examples] Next, the present invention will be explained in more detail with reference to the illustrated embodiments. The ones shown in FIGS. When viewed from the front, the reflector can be divided into vertical and horizontal lines by a vertical line passing through the paraboloid center line X and a horizontal line II.
The reflector 1 is divided into upper and lower parts at a position bordering the horizontal line H or slightly above the horizontal line (approximately 2 feet) to form an E section reflector 2 and a lower reflector 3. Both reflectors each have their focal point fl.

The position of f2 is different. That is, the upper reflector 2 is formed as a paraboloid of revolution reflecting mirror with a focal length F1 of 15 to 40 m+, and the lower reflector 3 is formed as a paraboloid of revolution with a focal length F2 of 15 to 40 m+. It will be done. The rotational center axis of the internal reflecting mirror is on the same axis, that is, the reflecting mirror center axis
2 will be installed. However, the distance between these focal points must be equal to or longer than the length of a passing filament, which will be described later.

The passing filament 4 is disposed above the central axis X and slightly shifted to the left in the figure.

In other words, it is located at the two focal points 4, and the direction of invasion of the focal point f2 is d2 (
0 to 6 shoes), d6 (0 to 2 shoes) above the central axis X, and d5 (0 to 2 shoes) laterally. Note that this passing filament 4 is tilted vertically or horizontally within a range of 2° from its center as a starting point. The other running filament 5
is disposed below the central axis X and on the right side in the figure.

In other words, the traveling filament 5 is placed at a position where its center is approximately parallel to the central axis 2-2 m) and downward d4 (
1.5 to 3.5 alI), and further shifted by an angle θ (0 to 60°) about the center of the passing filament 4. In other words, it is located within the range of an angle θ formed with the center of the passing filament 4 as the apex from a line segment V' that is parallel to the vertical line (1) and passes through the passing filament 1-.

Against the above-mentioned arrangement situation! The state of reflection between the passing filament 4 and the traveling filament 5 in the iFI mirror is shown in FIGS. 4 and 5, and the spot light pattern is shown in FIGS. 6 and 7. In the same figure, the running filament 5 is placed vertically on IIAv, d2=0.5°63-2.64-2.
3.65-0.66-0°5, and the filament length is 4 in each case.

First, to describe the pattern of the filament A for passing each other, in FIG. 4, the filament 4 for passing each other is located in front of the focal point f1, so the angle of incidence on the upper reflector 2 from the focal point f1 to the rear end of the filament is and a deviation angle α2 of the angle of incidence with respect to the upper reflector up to the front end of the filament,
As a result, as shown in FIG. 6(A), the horizontal line T1
The spot pattern 2a spreads out in a fan shape in the range of angles α1 to α2 at the lower side. Also, in the lower reflector 3, the passing filament 4 is at the focal point f.
2, so there is an angle of incidence deviation α3 from the focal point f2 to the front end of the filament to the flefter, and an angle deviation α4 of incidence to the flefter from the upper rear end of the filament, so it is lower than the horizontal lit H. angle α3 at
A fan-shaped spot pattern 3a is formed in the range from α4 to α4. Note that both spot patterns overlap as the same pattern. In particular, when the passing filament is on the vertical line v, the pattern shown in FIG. 6(A) is obtained, and when the passing filament is on the left side of the vertical line This results in a pattern as shown in Figure (A). In any case, the spot pattern of the passing filament is dl.

d2. By setting Fl and F2 to arbitrary dimensions, the angle of incidence on the reflector can be changed to obtain a desired light distribution pattern.

Next, the light distribution pattern of the traveling filament 5 will be explained. As shown in FIG. 5, the traveling filament 5 has a focal point f1. Since it is located below f2 and in front of the passing filament 4, the upper reflector 2
The reflection situation for the light beam has an angle of incidence deviation β1 from the focal point f1 to the rear end of the running filament to the glue flefter, and an angle deviation β2 of incidence to the glue flefter from the front end of the running filament, and from the top to the bottom of the horizontal line H, This results in a light distribution pattern 2b that spreads out in a fan shape in the range of angles β1 to β2 that are the same as or larger than the pattern of the passing filaments. In addition, in the lower reflector 3, there is an angle of incidence deviation β3 from the focal point f2 to the front end of the running filament to the glue deflector, and an angle deviation β4 of incidence to the glue deflector from the rear end of the running filament. As a result, as shown in FIG. 6(B), the center position β5 of the hot zone is displaced along the vertical line on and above the horizontal line H, and a deformed circular pattern 3b is formed. When the running filament is moved forward or backward as shown in FIG. 1, a light distribution pattern as shown in FIG. 7(B) is obtained.

Further, FIGS. 8 and 9 show the light distribution pattern in a state where the running filament is disposed in a different position, together with the light distribution pattern of the passing filament. Note that the light distribution pattern of the passing filament is shown as is in FIG. 7(B).

When the arrangement position in the running filament 5, that is, the dimension d3 is set to 1 to 2 (or -1 to 2jIll),
The reflection pattern on the upper reflector 2 has a larger sector shape, and the reflection pattern on the lower reflector 3 has a substantially circular shape, resulting in a light distribution pattern as shown in FIG. 8. Further, the light distribution pattern when the running filament is moved slightly to the right as shown in FIG. 1 is the light distribution pattern as shown in FIG. In this case, the reflected light reflected by the upper and lower reflectors is generally shifted to the right by a range of β6, and the reflected light reflected by the lower reflector 3 is slightly distorted, The upward reflected light is now regulated. In forming such a pattern, the hot zone β5 is determined by the interval between the deviation angle θ and d4, and its movement distance β6 is determined by the deviation angle θ. In addition, for right-hand traffic, the passing filament 4 is located on the right side of the upper reflector 2, and the traveling filament 5 is located on the right side of the lower reflector 3.
It is located on the left side of , and its positional relationship is the same as in the previous explanation.

[Function 1] The light distribution pattern emitted from the headlamp with the above configuration is shown in FIGS. 10 to 13. In the figure, 11 is a hot zone, 12 is a running beam, 13 is a staggered beam, and 14 is a road surface. In Figure 10,
Depending on the deviation angle θ, the traveling beam 12 and the deviation following beam 1 are
It shows that the irradiation position with 3 is shifted vertically as shown by arrow a, and I! Also on the screen, the distance d3 causes the m firing positions of the traveling beam 12 and the passing beam 13 to shift forward as indicated by the arrows. In the case of this figure, the deviation angle θ is within 30"jX, the switching angle between the driving beam and the passing beam is large, and the front of the road surface is dark, but there is a lot of light above, making it suitable for motorcycle use. Also, d3 is 1 to 2-
Figure 11 shows the case where the running beam 12 and the passing beam 13 are illuminated from relatively close distances, and the illumination light reaches as far away as the passing beam 12 and the passing beam 13. The zone is now illuminated with a reasonable amount of light, with the driving beam in particular illuminating nearby areas as brightly as the passing beam. Furthermore, the case where d3 is set to 0 to 11m is the 12th
8 is shown. In this case, the traveling beam 12 is directed slightly upward, and the separation position 8 is moved slightly forward of the Il control position of the passing beam 13, allowing the illumination light to reach far away, giving a sense of cutting. This results in a light distribution pattern. Furthermore, the first case where the deviation angle θ is 30 to 60°
This is shown in Figure 3. The light distribution pattern in this figure is such that the top of the driving beam 12 is flat, the hot zone is low, the switching angle between the driving beam and the passing beam is small, and the area in front of the road is also bright, but it still does not illuminate the distance. It still provides illumination, and moreover, it illuminates a long distance and a wide range efficiently, making it suitable as a headlamp for automobiles.

When installing such a headlamp on a vehicle, the shift angle θ can be changed to any angle depending on the vehicle installation height and required light distribution, etc., and the switching angle and light distribution between the driving beam and the passing beam can be adjusted. can be set arbitrarily. In addition, in order to improve the light distribution of the passing beam, by shifting the passing filament 4 to the side by the inner corner of d5, the traveling beam will be closer to the focal point without changing the mmi light distribution of the passing beam. , the hot zone of the traveling beam increases. Furthermore, by shifting the staggered filament upward by d6, the running beam approaches the focal point, and the hot zone of the running beam can be increased without changing the road surface light distribution pattern of the passing beam.

Todoroki, all of the above embodiments relate to headlamps for left-hand traffic, but if the headlamps are for right-hand traffic, the headlamps may be symmetrical with the previous embodiments.

[Invention! m1ll] As explained above, the vehicle headlamp according to the present invention has a parabolic reflector divided into an upper reflector and a lower reflector at or near the center axis of the paraboloid,
Since both of these reflectors were formed with their focus positions in mind, compared to the conventional 84 bulb, it is possible to use the 011i with a grazing beam, which doubles the light layer of the reflector and converts the illumination light into an H4 bulb. If it is made the same as that of 100%, the number of watts of the filament can be halved, resulting in remarkable energy savings.

Further, the length of the inner focal point is set to be longer than the length of the filament for passing, and the two filaments are arranged on the left and right across the vertical line and above and below across the central axis in the inner focal position. , the traveling filament is positioned in front of the passing filament, and the traveling filament forms an angle between a line parallel to the vertical line and passing through the passing filament, with the center of the passing filament as its apex. Since it is located within the maximum range of 60' of θ, together with the configuration of the parabolic reflector, the light distribution pattern of the traveling beam and the passing beam can be set arbitrarily, and It also has the excellent effect of brightly illuminating the traveling SaW further away without emitting glare light.

Furthermore, by dividing the parabolic reflector into upper and lower parts, specifying the lengths of both filaments, and arbitrarily selecting their arrangement, it is possible to obtain a headlamp with light distribution characteristics that match the type of vehicle to which it is installed. The effect is also 1! do.

[Brief Description of the Drawings] Fig. 1 is a front view of a headlamp according to an embodiment of the present invention with the front lens removed, and Fig. 2 is a front view of a headlamp according to an embodiment of the present invention.
3 is a sectional view taken along lines m to m in FIG. 1, FIGS. 6 (A), (B) to 9 (A), (B) are schematic cross-sectional views showing the arrangement positions of the filaments for passing each other, the filaments for passing each other, and the filaments for traveling and the filaments for traveling. It is a schematic diagram showing the state of light distribution on a road surface when the arrangement positions are changed. 1... Reflector 2... Upper reflector 3... Lower reflector 4... Filament for passing 5...
Running filament f1. f2...Focus Fl, F2...Focal length θ...Difference angle d1-d6...Interval (distance) α1-α4. β1 to β4... Angle 2a, 2b,
3a, 3b... Spot pattern V, V=...
... Vertical line X ... Central axis H ...
・Horizontal line patent applicant Stanley Electric Co., Ltd. ■ Figure 2 Figure 3 Figure 4 Figure 5 (A) (A) ■ Figure 6 (B) ■ Figure 7 (B) ■

Claims (1)

[Claims] The running filament and the passing filament,
In a vehicle headlamp in which the passing filament is arranged substantially parallel to the parabolic central axis of the reflector and above the traveling filament, the reflector is arranged at the position of the parabolic central axis or near the parabolic central axis, and the lower reflector and the lower reflector. These two reflectors are formed with different focal positions, and the interval between the two focal positions is set to be longer than the length of the passing filament, and the two filaments are connected by a vertical line between the two focal points. The running filament is arranged on the left and right sides and above and below the central axis, and the running filament is parallel to the vertical line and passes through the passing filament, and the maximum angle θ is formed by a line that is parallel to the vertical line and passes through the passing filament, with the center of the passing filament as the apex. A vehicle headlamp characterized by being positioned within a 60° range.