JP2000182424A - Headlight for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance functional capability and design capability by installing a second reflecting surface of a parabolic surface system on the outside corresponding to the light guide path of a first reflecting surface, installing a third reflecting surface in the vicinity of the optical axis of the first reflecting surface, and installing a positioning light source on the first reflecting surface or the second reflecting surface. SOLUTION: A first reflecting surface 3 is formed as a parabolic system such as a rotary parabolic surface, a focal point is arranged at a position near a light source 2, light from the light source 2 is reflected as substantially parallel light source and guided to a lens 7. A second reflecting surface 5 is formed as a reflecting surface of a parabolic surface system, having a focal point in the vicinity of a light guide path 4, and a second light source 51 is installed for positioning on the second reflecting surface 5. A support and poisoning wall 5a is installed at a position where seeing through a lens 7 is difficult, such as the back surface of the first reflecting surface 3 of the second reflecting surface 5 with the purpose of reinforcing or positioning with the first reflecting surface 3. A second light source 51 is installed by utilizing the wall 5a, thereby the effective surface area of the second reflecting surface 5 will not decrease.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlight of an automobile, and more particularly, to an improvement in performance by enabling an improvement in the utilization of a luminous flux with respect to a light source, and a novel appearance in appearance. The purpose is to provide a headlight that enables design.

[0002]

2. Description of the Related Art FIG. 7 shows an example of the structure of a conventional lamp 90 of this type. This lamp 90 is basically composed of a rotating parabolic reflector 9 having a light source 91 disposed at a focal point.
2 and a lens 93 having a lens cut 93a. The parallel parabolic reflecting mirror 92 obtains reflected light of substantially parallel rays, and the reflected light is used as the lens cut 9 of the lens 93.
In step 3a, a desired light distribution characteristic is obtained by appropriately diffusing the light.

[0003]

However, in the lamp 90 having the above-described structure, the depth of the reflecting mirror 92 is increased to improve the efficiency with respect to the light source 91, which hinders the mounting of the reflecting mirror 92 on a vehicle. So that
No further improvement in efficiency can be expected, and therefore, when further improvement in illuminance is required, it is necessary to cope with the increase in power consumption of the light source.

In particular, in recent years, there has been a tendency to favor a lamp 90 having a reduced height in the vertical direction when mounted on a vehicle, and the reflecting mirror 92 does not contribute to the generation of reflected light. Since the area of the upper and lower top plate portions 92a increases and the effective area as the reflecting mirror 92 decreases and the efficiency with respect to the light source 91 tends to further decrease, some means for improving the efficiency of the reflecting mirror 92 is required. Has become.

Here, the applicant of the present invention has already provided means for improving the efficiency of a reflecting mirror as Japanese Patent Application No. 10-197340, but the above application shows a basic configuration. However, it does not disclose any specific means for actually performing the method, and causes problems such as insufficient variations.

[0006]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, a parabolic system is used in which a light source is disposed at a position of a substantially focal point. At least one of the light guide paths reaching the back side is provided at the position, and a parabolic second reflection surface is provided outside the first reflection surface corresponding to the light guide path, and the second reflection surface is provided. An automotive headlamp provided with a third reflection surface near the optical axis of one reflection surface for substantially converging and reaching the light of the light source near the light guide path, The reflecting surface or the second reflecting surface of the automotive headlight characterized in that a positioning light source is provided, and a low-beam light distribution is set on the first reflecting surface, the second A traveling beam distribution is set on at least one of the two reflecting surfaces, and the traveling beam is distributed. A solution to the problem by providing means such as a vehicle headlamp provided with a shutter that can be opened and closed as necessary in the light guide path corresponding to the second reflection surface on which light is set. It is.

[0007]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 is a vehicle headlamp according to the present invention. The vehicle headlamp 1 includes a light source 2, reflectors 3, 5, and 6, and a lens 7. ing. According to the present invention, as described in Japanese Patent Application No. 10-197340, the reflecting mirror 3 has a first reflecting surface 3 and a second reflecting surface 3 disposed outside the first reflecting surface 3. The first reflecting surface 3 is provided with a light guide path 4 penetrating to the back surface, which is composed of a reflecting surface 5 and a third reflecting surface 6.

Here, the outline of the basic structure of the automotive headlamp 1 of the present invention will be described. The first reflecting surface 3 is formed as a paraboloid such as a rotating paraboloid, and the focal point is adjusted. Light source 2
, The light from the light source 2 is reflected as substantially parallel rays and directed toward the lens 7, and the light distribution characteristic is formed by the lens cut 7 a provided on the lens 7.

The third reflecting surface 6 is, for example, a light source 2 such as one or both of the top and bottom of the first reflecting surface 3 or both.
The light source 2 is provided at a position where it does not reach the first reflection surface 3, and the light source 2 has a first focus, and the vicinity of the exit 4 a of the light guide path 4 has a second focus. It is formed as an elliptical reflecting surface such as an ellipse.

Therefore, the third reflecting surface 6 forms an image of the light source 2 at the first focal point near the light guide path 4 where the second focal point is located. 5 is formed as a parabolic reflecting surface whose focal point is in the vicinity of the light guide path 4, so that the light source image formed by the third reflecting surface 6 is reflected as parallel rays and directed toward the lens 4. It will be frustrating.

Therefore, the present invention and Japanese Patent Application No. 10-197 are disclosed.
According to the configuration of No. 340, light reaching the top plate 3a, which has not been used conventionally, is collected by the third reflecting surface 6,
By directing the light on the second reflecting surface 5 in the irradiation direction, it is possible to realize a brighter headlight even with a light source of the same standard.

FIG. 2 shows a first embodiment of the automotive headlamp 1 having the above-described structure. In the first embodiment, the second reflecting surface 5 is provided with a second positioning surface. Are provided. At this time, the second light source 51 may be provided on the first reflecting surface 3. For example, when the second reflecting surfaces 5 are provided on both sides, the second outer Providing the second light source 51 on the side of the reflecting surface 5 is more suitable for the purpose as a vehicle sidelight.

The first reflecting surface 3 is provided on the second reflecting surface 5 for the purpose of reinforcement or alignment with the first reflecting surface 3.
The rising wall 5a is provided at a position that is difficult to see through the lens 7 such as the back surface of the lens.
a, the second light source 51 is provided.
It is assumed that 1 does not reduce the effective area of the second reflecting surface 5 and that the second light source 51 does not clearly appear through the lens 7.

FIGS. 3 and 4 show a second embodiment of the present invention. In the configuration of the present invention, the second reflecting surface 5 has a light distribution characteristic related to the first reflecting surface 3. No, light guide 4
Can be set independently according to the positional relationship with the exit 4a. The second embodiment is made using this characteristic.

FIG. 3 shows an example in which one second reflecting surface 5 is provided for the first reflecting surface 3, and a low-beam light distribution is provided for the first reflecting surface 3. Is set, whereas the second reflecting surface 5 is the exit 4 a of the light guide path 4.
Is positioned at the focal point, thereby obtaining a traveling beam light distribution. The light guide path 4 is provided with a shutter 8 which can be opened and closed as required.

In the vehicle headlamp 1 of the second embodiment configured as described above, if the light guide path 4 is closed by the shutter 8, light emitted forward will be reflected from the first reflection surface 3. The vehicle headlamp 1 has only a low beam distribution, that is, a low beam distribution.

Further, when the shutter 8 is opened, it is added to the low beam light distribution from the first reflecting surface 3, and
The light for traveling beam distribution from the second reflecting surface 5 is added, and the traveling beam distribution can be obtained as a whole. Therefore, the light distribution characteristics can be switched without adding a new light source 2.

FIG. 4 shows an example of the second embodiment in which the automotive headlamp 1 is provided with two second reflecting surfaces 5 with respect to the first reflecting surface 3; The traveling beam light distribution is set for both of the second reflecting surfaces 5 or one of the second reflecting surfaces 5, and the second reflecting surface 5 on which the traveling beam light distribution is set at the same time has Similarly, a shutter 8 is provided.

Therefore, also in this example, the passing beam distribution and the traveling beam distribution can be switched by opening and closing the shutter 8. In the second embodiment, the second light source 51 for positioning may be provided on the second reflecting surface 5 as described in the first embodiment.

FIG. 5 shows a third embodiment of the present invention. In the present invention, the second reflecting surface 5 is provided on the light guide path 4.
Can be regarded as a reflecting surface independent of the first reflecting surface 3 having a light source near the exit 4a. This means that the upper and lower widths H2 different from the upper and lower widths H1 set on the first reflecting surface 3 can be freely set.

Here, for example, when the third reflective surface 6 (not shown here, see FIG. 1) is provided on the upper top plate 3a, the light source 2 is considered. Upward light from the second reflecting surface 6 is reflected on the third reflecting surface 6, and the downward component becomes most of the light passing through the light guide path 4.
Will be reached.

From the above, in this case, extending the third reflecting surface 6 downward is effective from the aspect of improving efficiency, and FIG. 5 shows a state in which the third reflecting surface 6 extends downward. The present invention is not limited to this, and any of extending the third reflecting surface 6 upward and extending in both up and down directions can be freely performed.

Here, a supplementary description of the configuration of the third reflecting surface 6 and the light guide path 4 when implementing the third embodiment will be given. First, the third reflecting surface 6 is an ellipsoid such as a spheroid. Is formed as a reflecting surface, so that the traveling direction of light can be adjusted by tilting the long axis.
Therefore, when extending the second reflecting surface 5 downward, the third reflecting surface 6 also tilts the second focal point side downward, and if the position and orientation of the light guide path 4 are adjusted accordingly, the second The amount of light that can be supplied to the reflecting surface 5 increases, and further improvement in efficiency as the automotive headlamp 1 can be expected.

FIG. 6 shows a fourth embodiment of the present invention. As described in the third embodiment, the automotive headlamp 1 according to the present invention has a shape smaller than that of the conventional system. The degree of freedom is high. When the second reflecting surface 5 is extended downward as described above and is formed in a so-called key shape, the space when the fog lamp 11, the front turn signal lamp 12 and the like are formed in a key shape as shown in FIG. It is also possible to arrange the front combination lamp 20 by arranging it in a unit and integrating it.

In the fourth embodiment, the shape of the vehicle headlamp 1 is not limited to the above-mentioned key shape. For example, the basic shape and the two second reflecting surfaces 5 may be vertically aligned. The present invention can be implemented in various variations such as a substantially H-shape extending in a direction, a shape extending in both directions in a position direction, and a shape extending in opposite directions to each other. That is, the automotive headlamp 1 of the present invention is designed. The degree of freedom in terms of surface is high.

[0026]

As described above, according to the present invention, at least one of the light guide paths reaching the rear side is provided at an appropriate position on the first reflecting surface which is a parabolic system and in which the light source is disposed at a substantially focal position. While one is provided, a parabolic second reflecting surface is provided outside the first reflecting surface corresponding to the light guide path,
A light source for a positioning lamp in a vehicle headlamp provided with a third reflection surface near the optical axis of the first reflection surface for substantially converging and reaching the light of the light source near the light guide path; , The deformation of the second reflecting surface, the addition of a beam switching mechanism, etc., while improving the functionality,
The design is also improved, and it is possible to provide a design, performance, or combination of headlights that were not possible with the conventional headlight configuration, and it is extremely effective in improving the performance of this type of lamp Is played.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a basic configuration of a vehicular headlamp according to the present invention.

FIG. 2 is a sectional view showing a main part of the first embodiment of the vehicular headlamp according to the present invention.

FIG. 3 is a front view schematically showing a second embodiment of the vehicular headlamp according to the present invention.

FIG. 4 is a schematic front view showing another embodiment of the same second embodiment.

FIG. 5 is a front view schematically showing a third embodiment of the vehicle headlamp according to the present invention.

FIG. 6 is a front view schematically showing a fourth embodiment of the vehicular headlamp according to the present invention.

FIG. 7 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Headlight for vehicles 2 ... Light source 3 ... 1st reflective surface 4 ... Light guide path 4a ... Exit 5 ... 2nd reflective surface 51 ... 2nd light source 6 ... 3rd Reflecting surface 7 Lens 8 Shutter 11 Fog lamp 12 Front turn signal lamp 20 Front combination lamp

Claims (4)

[Claims] At least one light guide path extending to the back side is provided at an appropriate position of a first reflecting surface which is a parabolic system and a light source is disposed at a position of a substantially focal point, and the first reflecting surface is provided. A parabolic second reflecting surface is provided on the outer side of the surface corresponding to the light guide path, and the light of the light source is provided in the vicinity of the optical axis of the first reflecting surface in the vicinity of the light guide path. An automotive headlamp provided with a third reflecting surface to be focused and reached, wherein a positioning light source is provided on the first reflecting surface or the second reflecting surface. Automotive headlights. 2. A passing beam distribution is set on the first reflecting surface, a running beam distribution is set on at least one of the second reflecting surfaces, and the running beam distribution is set. The vehicle headlight according to claim 1, wherein a shutter that can be opened and closed as needed is provided in the light guide path corresponding to the second reflection surface. 3. The height of the second reflecting surface in a vertical direction in a state of being attached to an automobile is higher than the height of the first reflecting mirror, in one of two directions, or in both directions. The vehicle headlight according to claim 1, wherein the headlight is extended toward the vehicle. 4. The combination according to claim 1, wherein a reflection surface having a function other than a headlight is integrated with the first reflection surface or the second reflection surface. An automotive headlight according to claim 2 or claim 3.