JP2558793Y2 - Vehicle headlights - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlight for a vehicle, and more particularly to a headlight called a projector type.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional headlamp 90 of this type, which is called a projector type. A bifocal system such as a spheroid in which a light source 91 is arranged at one focal point is shown. And a light shielding plate 94 is provided near the focal point of the projection lens 93, that is, between the reflection mirror 92 and the projection lens 93. By shielding unnecessary portions on the light distribution characteristics, a required light distribution shape is obtained.

[0003]

However, in the above-mentioned conventional headlamp 90, the projection lens 93 has an extremely small diameter because it is of a projector type. Second, the provision of the light-shielding plate 94 naturally causes the reflection mirror 92 to become difficult.
A part of the light reaching the projection lens 93 from the light source 91 is blocked and lost, causing a problem that the headlight 90 becomes dark in spite of the power consumption of the light source 91, and solving these points is an issue. Had become something.

[0004]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, there is provided a projector-type lamp, in which a light shielding plate is provided between a reflecting mirror and a projection lens. In a vehicle headlamp that forms a light distribution characteristic by blocking a part of the reflected light from the light source, a notch is provided in a portion of the reflector that is shielded by the shield plate. A first auxiliary reflecting surface that divides the direct light in the left-right direction of the reflecting mirror and converges and reflects the light; A second auxiliary reflection surface is provided, and a third auxiliary reflection surface that reflects light reflected from the first auxiliary reflection surface substantially parallel to the irradiation direction of the headlight is provided in the left-right direction of the reflector. The problem is solved by providing a vehicle headlamp characterized by that It is intended.

[0005]

Next, the present invention will be described in detail with reference to an embodiment shown in the drawings. 1 and 2 is a vehicle headlight according to the present invention (hereinafter abbreviated as headlight 1).
The headlamp 1 includes a reflector 3, in which a light source 2 such as a halogen bulb is disposed at a focal point, a projection lens 4, and an intermediate portion between the reflector 3 and the projection lens 4. This is basically the same as the conventional example in that it is basically constituted by a light shielding plate 5 arranged so as to shield a part of the light from the reflecting mirror 3.

However, according to the present invention, the reflector 3
A notch 3a is provided in a portion of the projection lens 4 which is shielded by the light shielding plate 5, and each of the notches 3a reflects a direct light from the light source 2 in a predetermined direction. An auxiliary reflection surface 6 and a second auxiliary reflection surface 7 are provided.

Here, the first auxiliary reflection surface 6 and the second auxiliary reflection surface 7 will be described in more detail. First, the first auxiliary reflection surface 6 is composed of a left first auxiliary reflection surface 6L and a right first reflection surface 6L. The left first auxiliary reflecting surface 6L is a direct light beam from the light source 2 (the left and right sides are referred to as being viewed from the front while facing the headlight 1). Is reflected toward the left side of the reflecting mirror 3, and the right first auxiliary reflection surface 6L is reflected toward the right side.

At this time, the left and right first auxiliary reflection surfaces 6
Each shape of L and 6R is formed as a paraboloid of revolution (parabola) having, for example, the position of the light source 2 as a focal point and each of the left and right first auxiliary reflection surfaces 6L and 6R having the axis of the intended reflection direction as an axis. The light from the light source 2 is reflected in a desired direction while being converged into parallel light.

On the other hand, the second auxiliary reflection surface 7 is formed of, for example, a single paraboloid of revolution having the light source 2 as a focal point and the irradiation direction Z of the headlight 1 as a rotation axis. Thereby, the second auxiliary reflecting surface 7 generates a parallel light beam substantially along the irradiation direction Z of the headlight 1.

The left and right first auxiliary reflecting surfaces 6L, 6R
Are provided on the left and right sides of the reflecting mirror 3 to which the light from each of the above reaches, for example, a third auxiliary reflecting surface 8 as a plane mirror, and this third auxiliary reflecting surface 8 is also the above-mentioned left and right first auxiliary reflecting surfaces 6L, 6R.
Similarly, the left and right third auxiliary reflection surfaces 8L and 8R are provided, and the left and right third auxiliary reflection surfaces 8L and 8R respectively reflect the reflected light from the corresponding left and right first auxiliary reflection surfaces 6L and 6R. The light is set to be reflected substantially parallel to the irradiation direction Z of the illuminator 1.

In the above description, when both the second auxiliary reflecting surface 7 and the third auxiliary reflecting surface 8 are reflected substantially parallel to the irradiation direction Z of the headlight 1, the reflected light is reflected by the headlight. It is necessary to select a set position so that vignetting does not occur due to the projection lens 4 or the light shielding plate 5, which is a component originally included in the apparatus.

In the above description, a paraboloid of revolution is employed as the first auxiliary reflection surface 6 and the second auxiliary reflection surface 7. This is a parabolic column that converges light only in one direction, for example, only in the vertical direction. The light distribution characteristics determined by the reflecting mirror 3, the projection lens 4, and the light shielding plate 5, and the distribution obtained by the first to third auxiliary reflecting surfaces 6, 7, 8 What is necessary is just to select the one that can further obtain the expected effect on the overall characteristics when combined with the optical characteristics.

In addition, in the present invention, the auxiliary lens 9 is located at the position where the reflected light from the second auxiliary reflection surface 7 and the third auxiliary reflection surface 8 on the left, right, and below the projection lens 4 passes.
The auxiliary lens 9 is provided with a lens cut 9a as necessary.

Next, the operation and effect of the headlamp 1 of the present invention having the above-described structure will be described.
Irradiation of the headlight 1 is performed by the first reflection by the first auxiliary reflection surface 6 and the third auxiliary reflection surface 8, and the single reflection by the second auxiliary reflection surface 7. By providing appropriate orientation characteristics by the auxiliary lens 9 as light traveling in the direction, as shown in FIG. 3, in addition to the basic light distribution characteristics H1 of the reflecting mirror 3, the projection lens 4, and the light shielding plate 5, an auxiliary reflecting surface is provided. The double reflection auxiliary light distribution characteristic H2 by the auxiliary reflection surface 6 and the single reflection auxiliary light distribution characteristic H3 by the auxiliary reflection surface 7 are added, and the headlight 1 having a brightness corresponding to the power consumption of the light source 2 is obtained. It will be something that can be done.

Here, the combination of the double reflection by the first auxiliary reflection surface 6 and the third reflection surface 8 and the single reflection by the second auxiliary reflection surface 7 is used as the auxiliary reflection surface. The direct light from the light source 2 reaching the vicinity of the back of the light-shielding plate 5 can be collected without being shielded by the light-shielding plate 5 by being reflected twice, and once-reflection can be efficiently collected in other parts. This is because

Further, as described above, in addition to the projection lens 4, the auxiliary lenses 9 through which the reflected light is transmitted by the auxiliary reflecting surfaces 7, 8 are provided on the left, right, and lower portions, so that the light of the headlight 1 is emitted. The area is greatly increased.

FIG. 4 shows a second embodiment of the present invention. In the first embodiment, the first auxiliary reflecting surface 6 and the second auxiliary reflecting surface 7 are formed as separate bodies, Whereas the first purpose is to improve the collection efficiency by arranging them at appropriate positions, the second embodiment aims to achieve the above object with a more simplified configuration. It is.

The object is to arrange the first auxiliary reflection surface 61 in the vicinity immediately below the light source 2 and to arrange the second auxiliary reflection surface 71 in front of the first auxiliary reflection surface 61.
71 can be integrated, and the object is achieved. Here, also in the second embodiment, the second auxiliary reflection surface 71 may have a positional relationship in which reflected light substantially parallel to the irradiation direction Z does not interfere with the light shielding plate 5. Needless to say.

FIG. 5 shows an example of light distribution characteristics in the second embodiment. The other operations and effects are the same as those of the first embodiment, so that the detailed description is omitted here.

[0020]

As described above, according to the present invention, a notch is provided in a portion of the reflector that is shielded by the shield plate, and the direct light from the light source is divided into the notch in the left-right direction of the reflector. A first auxiliary reflecting surface that converges and reflects, and a second auxiliary reflecting surface that converges and reflects the direct light from the light source substantially in parallel with the irradiation direction of the headlight, and in the left-right direction of the reflecting mirror By using a vehicle headlight provided with a third auxiliary reflection surface that reflects light reflected from the first auxiliary reflection surface substantially parallel to the irradiation direction of the headlight, a conventional projector-type headlight In the lamp, it is possible to reproduce light in a portion which has been invalidated by being shielded by a light shielding plate, and to provide a bright headlight that matches the power consumption of the light source.

Further, with the above-mentioned structure, auxiliary lenses are provided on the left and right and below the projection lens, and the light emitting area of the vehicle headlamp is increased, which is a problem of the projector type headlamp. This also improves the visibility from oncoming vehicles, and at the same time, provides an extremely excellent effect in improving the practical performance of this type of projector type headlamp.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a vehicle headlamp according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a graph showing light distribution characteristics of the first embodiment of the vehicle headlamp according to the present invention.

FIG. 4 is a sectional view showing a second embodiment of the vehicle headlamp according to the present invention.

FIG. 5 is a graph showing the light distribution characteristics of the second embodiment.

FIG. 6 is a sectional view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Headlight for vehicles 2 ... Light source 3 ... Mirror 3a ... Notch part 4 ... Projection lens 5 ... Shield plate 6 ... 1st auxiliary | assistant reflective surface 6L ... 6R right first auxiliary reflection surface 7 second auxiliary reflection surface 8 third auxiliary reflection surface 9 auxiliary lens Z irradiation direction H1 basic light distribution characteristic, H2 double reflection auxiliary Light distribution characteristics, H3: Single reflection auxiliary light distribution characteristics

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicular headlamp, which is a projector-type lamp, wherein a light-shielding plate is provided between a reflector and a projection lens, and a part of light reflected from the reflector is blocked to form a light distribution characteristic. A notch portion provided in a portion of the reflecting mirror which is shielded by the shielding plate, and a first auxiliary reflecting surface that divides direct light from a light source in the left-right direction of the reflecting mirror and converges and reflects the notched portion. And a second auxiliary reflecting surface that reflects the direct light from the light source substantially parallel to and converges with the irradiation direction of the headlight, and from the first auxiliary reflecting surface in the left-right direction of the reflecting mirror. A third auxiliary reflecting surface for reflecting the reflected light substantially parallel to the irradiation direction of the headlight.