JP2580364Y2 - Variable light distribution lighting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a vehicle such as a headlight or a fog lamp, and more specifically, for example, to widen an irradiation angle of a light distribution pattern during turning of a vehicle to facilitate confirmation of a road shoulder. The present invention relates to an illumination lamp that changes a light distribution pattern.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a configuration of a conventional vehicular illumination lamp in which a variable light distribution pattern is required and a variable light distribution illumination lamp 90 is formed. A part of the reflecting mirror 91 is separately formed on both left and right sides of the light source 92 as an auxiliary reflecting surface 91a.
1a is configured so that each can move horizontally in a direction away from the light source 92.

In the above configuration, during normal traveling, the reflecting mirror 91 and the auxiliary reflecting surface 91a form an integral paraboloid of revolution, and the light distribution characteristics of the lens 93 and the like provided by the lens cut are suitable for traveling. However, when it is necessary to change the light distribution characteristics, for example, when turning a car, the auxiliary reflection surface 91a is horizontally moved in a direction away from the light source 92, so that the reflection from the auxiliary reflection surface 91a is performed. Each light turns the irradiation direction to the outside,
As a result, the irradiation angle of the light distribution pattern is widened, and the purpose is achieved by making it easy to confirm the road shoulder and the like.

[0004]

However, in the variable light distribution illumination lamp 90 having the above-described conventional configuration, as described above, an integral rotating paraboloid for originally forming a light distribution characteristic during traveling. Auxiliary reflecting surface 91a which is a part of the surface
The light distribution characteristics are changed by moving the reflected light from the light source, and at the time of this change, the light distribution characteristics cause a problem that the illuminance is reduced and the shape is collapsed, and the performance for traveling is reduced. However, solving this point has been an issue.

[0005]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, a light distribution pattern is changed by moving an optical means such as a reflector. In the variable light distribution illumination lamp, the variable light distribution illumination lamp emits spot light directed in the irradiation direction to both sides of the projection lens by an auxiliary reflection mirror provided in place of a portion that generates light that is invalidated by a shielding plate of an ellipsoidal reflection mirror. Providing a variable light distribution illumination lamp comprising: a generated projector-type lamp; and a light distribution adjustment lens on which at least one of the spotlights is provided with a diffusion cut that is allowed to enter and exit freely in the optical path of the spotlight. It is to solve the problem.

[0006]

Next, the present invention will be described in detail with reference to an embodiment shown in the drawings. FIG. 1 shows a variable light distribution illumination lamp 1 according to the present invention. The variable light distribution illumination lamp 1 basically includes an elliptical reflecting mirror 3 having a light source 2 and a projection lens 4.
The projector-type lighting device 10 including the shielding plate 5 and the shielding plate 5 is adopted.

Here, in the elliptical reflecting mirror 3 of the projector type lamp 10, an ineffective portion which is shielded by the shielding plate 5 and does not allow the reflected light to reach the projection lens 4 is generated in the lower half. Therefore, in the present invention, the above-mentioned ineffective portion is notched and replaced with the auxiliary reflecting mirror 6.

In this embodiment, the auxiliary reflecting mirror 6 reflects the direct light from the light source 2 as convergent light directed obliquely rearward, which is divided into left and right sides of the elliptical reflecting mirror 3. A surface 6a, and a second reflecting surface 6b provided on each of the left and right sides of the elliptical reflecting mirror 3 and reflecting light reflected from the first reflecting surface 6a in the irradiation direction. I have.

Next, the configuration of the reflecting surfaces of the first reflecting surface 6a and the second reflecting surface 6b will be described. The first reflecting surface 6a has the light source 2 as a focal point and the rotation axis is directed in the direction of the reflecting surface 6b. Therefore, the direct light from the light source 2 reflected on the first reflecting surface 6a is incident on the second reflecting surface 6b as a parallel light beam. Since the spot light has already been obtained in a state where the light is reflected by the one reflecting surface 6a, the second reflecting surface 6
For b, a plane mirror for simply changing the traveling direction of the light beam to the irradiation direction side is adopted.

With the above-described configuration, in the projector-type lamp 10, the original light distribution characteristic D of the projector-type lamp 10 from the projection lens 4 as shown in FIG.
It has three beams of two spot lights S1 and S2 generated by the auxiliary reflecting mirror 6 and arranged close to both sides of the light distribution characteristic D.

In the present invention, in addition to the above, the spot light S
For example, a light distribution adjusting lens 7 which goes in and out in conjunction with a steering device is provided in each of S1 and S2. The light distribution adjusting lens 7 diffuses light in a horizontal direction such as a cylindrical cut having an axis in a vertical direction. For example, the light distribution adjusting lens 7 is inserted into the optical path of the spot light S1 on the left side when the above-described steering device is operated to the left turning side, and is shifted to the right side when the steering apparatus is operated to the right turning side. A light distribution adjusting lens 7 is inserted in the optical path of a certain spot light S2, and the irradiation angle is increased in the subsequent traveling direction as shown by broken lines in FIG.

Next, the operation and effect of the variable light distribution illumination lamp 1 according to the present invention having the above-described configuration will be described. The spotlight is provided by the auxiliary reflector 6 instead of the invalid part of the elliptical reflector 3 of the projector-type lamp 10. The light S1 (S2) is generated, and the spot light S1 is diffused by the light distribution adjusting lens 7 in accordance with the operation of the steering device, for example, so that the irradiation angle is widened. Light distribution characteristics D
Will not cause a slight decrease in illuminance.

In actual practice, the shape of the first reflecting surface 6a and the second reflecting surface 6b of the auxiliary reflecting mirror 6 is not necessarily limited to a paraboloid of revolution and a plane mirror. For example, the first reflecting surface 6a side may be a parabolic cylindrical mirror, and the second reflecting surface 6b side may also be a parabolic cylindrical mirror. In short, spot lights S1 and S2 having an appropriate shape in the irradiation direction.
Should be obtained.

The light distribution adjusting lens 7 may also be inserted into both of the spot lights S1 and S2 at the same time. Further, for example, the variable light distribution illumination lamp 1 installed on the left side of the automobile may have a left side. The configuration may be such that only the right side spot light S2 is provided for the variable light distribution illumination lamp 1 installed only on the side of the spot light S1 and the right side.

[0015]

As described above, according to the present invention, according to the present invention, a spot light is generated by an auxiliary reflecting mirror which replaces an ineffective portion of an elliptical reflecting mirror of a projector type lamp, and the spot light is diffused by a light distribution adjusting lens. By adopting a configuration in which the irradiation angle is widened and a variable light distribution is used, even when the variable light distribution is performed, the original light distribution characteristics do not cause a slight decrease in the illuminance or the collapse of the shape. This type of variable light distribution lamp has an extremely excellent effect in improving the performance.

Further, since the original light distribution characteristic from the projector-type lamp and the spot light for variable light distribution become independent by the above configuration, it is possible to freely set an optimum light distribution shape and the like. Further improvements in performance such as visibility can be achieved. Further, since the spot light is generated from an ineffective portion of the projector-type lamp, the overall luminous flux utilization rate as the lamp is improved, and an effect that a bright lamp can be realized is also provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a variable light distribution illumination lamp according to the present invention.

FIG. 2 is a graph showing light distribution characteristics obtained by the same embodiment.

FIG. 3 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Variable light distribution lighting lamp 2 ... Light source 3 ... Elliptical reflective mirror 4 ... Projection lens 5 ... Shielding plate 6 ... Auxiliary reflective mirror 6a ... 1st reflective surface, 6b ... 2nd reflective surface 7 ... Light distribution adjusting lens 10 Projector lamp S1, S2 Spot light

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F21M 3/05 B60Q 1/124 F21M 3/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A variable light distribution illumination lamp for a vehicle configured to change a light distribution pattern by moving an optical means such as a reflection mirror, wherein the variable light distribution illumination light is disabled by a shielding plate of an elliptical reflection mirror. A projector-type lamp in which spot light directed in the irradiation direction is generated on both sides of the projection lens by an auxiliary reflecting mirror provided in place of a portion that generates light, and at least one of the spot lights can freely enter and exit the optical path of the spot light. A variable light distribution illumination lamp comprising: a light distribution adjustment lens having a diffusion cut.