JPH062503U - Variable light distribution lighting - Google Patents

Abstract

(57) [Summary] [Purpose] In the conventional variable light distribution illumination lamp, since a part of the light forming the light distribution characteristic is diffused to widen the irradiation angle and realize the variable light distribution. However, there is a performance problem such as a decrease in illuminance during variable light distribution. A spot light S1 is formed by an auxiliary reflecting mirror 6 which replaces the ineffective portion of the ellipsoidal reflecting mirror 3 of the projector-type lamp 10.
Is generated and the spot light S1 is diffused by the light distribution adjustment lens 7 that goes in and out in accordance with the operation of the steering device to widen the irradiation angle, so that the original light distribution is achieved even when the variable light distribution is performed. The problem is solved by assuming that the characteristic D does not cause a slight decrease in illuminance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle lighting device such as a headlight and a fog lamp. More specifically, for example, when the vehicle turns, the light distribution pattern can be changed by widening the irradiation angle of the light distribution pattern and making it easier to check the road shoulders. The present invention relates to a lighting fixture.

[0002]

[Prior art]

 FIG. 3 shows an example of the configuration when the variable light distribution lamp 90 is required in the conventional vehicle lighting device and the variable light distribution lamp 90 is used. A part of the auxiliary light-reflecting surface 91a is separately formed on the left and right sides of the light source 92, and the auxiliary light-reflecting surface 91a is horizontally movable in a direction away from the light source 92.

In the above structure, during normal traveling, the reflecting mirror 91 and the auxiliary reflecting surface 91a form an integral paraboloid of rotation, and the light distribution characteristic due to the lens cut on the lens 93 is also suitable for traveling. However, when it is necessary to change the light distribution characteristics, for example, when the vehicle is turning, the auxiliary reflection surface 91a is horizontally moved in a direction away from the light source 92 to reflect the light from the auxiliary reflection surface 91a. Each of the lights causes the irradiation direction to be directed outwards, which widens the irradiation angle of the light distribution pattern and makes it easy to check the shoulders and the like to reach the purpose.

[0004]

[Problems to be solved by the device]

 However, in the variable light distribution illumination lamp 90 having the above-described conventional configuration, as described above, the auxiliary reflection that is originally a part of the integral paraboloid of revolution for forming the light distribution characteristic during traveling. Since the light distribution characteristic is changed by moving the reflected light from the surface 91a, at the time of this change, the light distribution characteristic causes a decrease in illuminance and a collapse of the shape, which deteriorates the performance for traveling. And the solution of this point became an issue.

[0005]

[Means for Solving the Problems]

 The present invention is, as a concrete means for solving the above-mentioned conventional problems, a variable light distribution illuminating lamp for a vehicle configured to change a light distribution pattern by moving an optical means such as a reflecting mirror. The light distribution illumination lamp is a projector-type lighting device that produces spot light in the illumination direction on both sides of the projection lens by an auxiliary reflector that is provided in place of the portion that produces ineffective light due to the elliptical reflecting mirror shield plate. The present invention is to solve the problem by providing a variable light distribution illuminating lamp, characterized in that it comprises at least one light distribution adjusting lens which is provided with a diffusion cut that can freely move in and out of the optical path of the spot light. is there.

[0006]

【Example】

 Next, the present invention will be described in detail based on an embodiment shown in the drawings. Reference numeral 1 in FIG. 1 denotes a variable light distribution illuminating lamp according to the present invention. This variable light distribution illuminating lamp 1 basically has an elliptical reflecting mirror 3 having a light source 2, a projection lens 4, and a shielding plate 5. The projector type lighting device 10 configured by is adopted.

Here, in the elliptical reflecting mirror 3 of the projector-type lamp 10, an ineffective portion which is shielded by the shield plate 5 and does not reach the projection lens 4 is generated in the lower half portion. Therefore, in the present invention, the above-mentioned ineffective portion is cut out and replaced by 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 which is divided into the left side and the right side of the ellipsoidal reflecting mirror 3 and is directed obliquely rearward. It is configured to include a reflecting surface 6a and a second reflecting surface 6b which is provided on each of the left and right sides of the elliptical reflecting mirror 3 and reflects the reflected light from the first reflecting surface 6a in the irradiation direction. ing.

Next, the configuration of the reflection surface shape of the first reflection surface 6a and the second reflection surface 6b will be described. The first reflection surface 6a has the light source 2 as the focal point and the rotation axis of the reflection surface 6b. It is formed by a rotating parabolic mirror having a direction, and therefore, the direct light from the light source 2 reflected by the first reflecting surface 6a is incident on the second reflecting surface 6b as parallel rays. Therefore, since the spot light is already obtained in a state of being reflected by the first reflecting surface 6a, the second reflecting surface 6b employs a plane mirror for simply changing the traveling direction of the light beam to the irradiation direction side. It will be one.

With the above configuration, in the projector type lighting device 10, as shown in FIG. 2, the original light distribution characteristic D of the projector type lighting device 10 from the projection lens 4 and the auxiliary reflecting mirror 6 are generated. Then, it has three beams of two spot lights S1 and S2 which are arranged close to each other on both sides of the light distribution characteristic D.

In addition to the above, in the present invention, a light distribution adjusting lens 7 that goes in and out of the spot lights S1 and S2 is provided, for example, in conjunction with a steering device. A lens cut 7a for diffusing light in a horizontal direction such as a cylindrical cut having an axis is provided. For example, when the steering device is operated to the left turning side, a light distribution adjusting lens is provided in the optical path of the spot light S1 on the left side. When 7 is inserted and operated to the right turning side, the light distribution adjusting lens 7 is inserted in the optical path of the spot light S2 on the right side, and the irradiation angle is set to the subsequent traveling direction side as shown by the broken lines in FIG. It will expand.

Next, the operation and effect of the variable light distribution illuminating lamp 1 of the present invention having the above-described structure will be described. A spot is provided by an auxiliary reflecting mirror 6 which is a substitute for the ineffective portion of the elliptical reflecting mirror 3 of the projector type lamp 10. The light S1 (S2) is generated, and the spot light S1 is diffused by the light distribution adjustment lens 7 in accordance with the operation of the steering device to widen the irradiation angle. The original light distribution characteristic D has a slight decrease in illuminance.

In the actual implementation, the reflecting surface shapes of the first reflecting surface 6a and the second reflecting surface 6b of the auxiliary reflecting mirror 6 are not necessarily limited to the rotating parabolic mirror and the plane mirror. For example, the side of the first reflecting surface 6a may be a parabolic prism, and the side of the second reflecting surface 6b may be a parabolic mirror. In short, spot lights S1 and S2 having an appropriate shape in the irradiation direction may be used. It is good if it can be obtained.

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

[0015]

[Effect of device]

 As described above, according to the present invention, spot light is generated by an auxiliary reflecting mirror that replaces the ineffective part of the ellipsoidal reflecting mirror of a projector-type lamp, and this spot light is diffused by a light distribution adjustment lens and the irradiation angle is changed. By making the variable light distribution wide, the original light distribution characteristics do not cause a decrease in illuminance or shape collapse even when variable light distribution is performed. It is extremely effective in improving the performance of the variable light distribution illumination lamp.

Further, since the original light distribution characteristic from the projector type lighting device and the spot light for variable light distribution are independent by the above configuration, it is possible to freely set the optimum light distribution shape. Therefore, it is possible to further improve performance such as improved visibility. Further, since the spot light is generated from the ineffective portion of the projector-type lamp, the total luminous flux utilization rate of the lamp is also improved, and an effect that a bright lamp can be realized is also obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an 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 example.

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

[Explanation of symbols]

 1 ... Variable light distribution illumination lamp 2 ... Light source 3 ... Elliptical reflecting mirror 4 ... Projection lens 5 ... Shielding plate 6 ... Auxiliary reflecting mirror 6a ... First reflecting surface, 6b ... Second reflecting surface 7 ...... Light distribution adjustment lens 10 ...... Projector type lamp S1, S2 ...... Spot light

Claims (1)

[Scope of utility model registration request] 1. A variable light distribution illuminating lamp for a vehicle configured to change a light distribution pattern by moving an optical means such as a reflecting mirror, wherein the variable light distributing illuminating lamp is disabled by a shield plate of an ellipsoidal reflecting mirror. And a projector-type lamp that generates spot light directed toward the irradiation direction on both sides of the projection lens by an auxiliary reflecting mirror provided in place of the portion that generates light A variable light distribution illuminating lamp comprising a light distribution adjusting lens that is diffusion cut.