JP2753908B2 - Vehicle 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 vehicular lamp in which a prism step for controlling light distribution is formed on an outer cover in order to conform an irradiation light beam to a predetermined light distribution standard.

[0002]

2. Description of the Related Art Conventionally, a fog lamp which is used in parallel with a headlight for general traveling uses a light distribution of an illuminating light beam which diffuses in a horizontal direction for the purpose of irradiating a relatively close road surface. A lamp having characteristics is mounted and used so that the optical axis is inclined downward. Such a conventional file
In the structure of the lamp, the light distribution is attached to the vehicle.
However, as shown in FIG. 6, the horizontal direction, that is, the outer cover
The irradiation pattern P1 of the irradiation light beam diffused in the left-right direction is horizontal.
The vehicle is now located at a distance h below the line H.
Clearly illuminate the road surface immediately before both. In addition, actual opening 1-12
No. 4603 has a cover integrally formed with a correction lens.
Place the lens in front of the projection lens and
Type headlamp configured to control light distribution
Is disclosed.

[0003]

However, in the structure of the above-mentioned conventional fog lamp, the light distribution is excellent in the function of irradiating the road surface immediately before the vehicle when mounted on the vehicle, but is close to the horizontal line H. There is no luminous flux in the part,
Because the contrast with the projection part becomes very strong,
Positive visibility of pedestrians and obstacles behind the vehicle to drive safely
Could cause problems. Also, from the projection lens
The above-described project configured to control light distribution in a predetermined direction.
Kuta headlights were difficult with only a single lens
For each part, especially in front of the front where brightness is most needed
Fine adjustment of the light distribution characteristics of the irradiating light beam, that is, the irradiation pattern
It is configured as follows.

[0004] The present invention has been made in view of the above problems, in the substantially square-shaped fog lamp that Hi設the outer cover, for example, in front of the projector-type light source, usually
It is an object of the present invention to provide a vehicular lamp in which an auxiliary light distribution portion is formed above the irradiation pattern, that is, at a position of a horizontal line, and visibility of an opposing obstacle is improved.

[0005]

According to the present invention, there is provided a vehicular lamp in which an outer cover is provided on a front opening of a lamp body, and a light source of a projector lamp unit incorporated in the lamp body is substantially parallel to the outer cover. In a substantially square lamp having a structure for irradiating and transmitting a light beam, the inner cover positioned slightly above the optical axis position of the outer cover transmits light to the inner surface.
The gist of the present invention is to form a fine prism step for refracting a light beam slightly upward with respect to the optical axis of the projector lamp unit . The above prisms
Steps are left and right above the optical axis of the outer cover
It can be formed to extend in the direction.

[0006]

According to the above construction, the irradiation pattern by the light flux transmitted and refracted through the prism step is positioned slightly above the entire irradiation pattern irradiated in front of the outer cover. Therefore, when the irradiation light beam by the prism step to adjust aiming the lamp so as to be positioned on a horizontal line, the whole of the light beam becomes slightly downward, for example as a fog lamp forms a beam for irradiating the vehicle immediately before. And at the same time lighting the front of the vehicle
Lighting toward the front horizontal line at the top of the illumination pattern
Is obtained, so that an extremely dark portion is not formed in the horizontal line portion.

[0007]

EXAMPLES Hereinafter, Foguran a vehicle lamp according to the present invention
An embodiment applied to a pump will be described with reference to FIGS. In the drawings, reference numeral 1 denotes an outer cover 2 at a front opening.
And a lumen 3 of the lamp body 1.
A substantially rectangular projector lamp unit 4 that emits a parallel light beam through a convex lens 5 provided on the front surface is disposed such that its optical axis L coincides with the optical axis of the outer cover 2. It is.

The projector lamp unit 4 has two focal points F1 and F2 at the rear end of a casing 6, constitutes an ellipsoidal reflector 7, and has a lighting bulb 8 at the first focal point F1. Are arranged, and the second focal point F2 and the convex lens 5 provided on the front surface of the casing 6 share a focal point.
Between the two, a shade 9 for regulating and controlling the cross-sectional shape of the light beam is provided.

Further, the outer cover 2 is fitted and fixed to a fitting groove 10 provided on the front end edge of the lamp body 1 by a sealing edge 11 formed on the outer periphery via an adhesive 12. There is a prism on the inner surface of the outer cover 2 for slightly refracting (about 4 °) the luminous flux entering the portion at a position slightly apart (separation distance h) from the position of the optical axis L. Step 13 is formed. This prism
Step 13 extends in the left-right direction of the outer cover 2.
It can be formed as follows. Further , as shown in FIG. 3, the prism step 13 has a vertical width S1.
Has a fine prism cross section of 1.3 mm and a height S2 of 0.2 mm, and the length S3 in the left-right direction is about half the length of the outer cover 2. On the rear surface of the outer cover 2, fine diffusion steps 14, 14,... Having a cylindrical shape extending in the vertical direction at a pitch of 0.15 mm as shown in FIG. The light beam is configured to diffuse in the left-right direction.

Reference numeral 15 denotes an extension interposed between the outer cover 2 and the outer periphery of the convex lens 5 of the projector lamp unit 4. The inner surface is mirror-finished.

In the vehicle lamp configured as described above, a parallel light beam whose shape is controlled to a predetermined irradiation pattern by the light blocking action of the shade 9 from the bulb 8 of the projector lamp unit 4 is emitted toward the outer cover 2. .
Since the outer cover 2 has diffusion steps 14, 14,... Formed over the entire surface, a road surface irradiation pattern P1 which is separated below the horizontal line H and diffused in the left-right direction is formed as shown in FIG. At the same time, the light beam entering the prism step 13 is slightly refracted upward at this portion, and the horizontal portion irradiation pattern P2 on the horizontal line H is elongated horizontally.
(Auxiliary light distribution section).

As a result, the visibility immediately before the vehicle can be ensured by the road surface portion irradiation pattern P1.
The portion of the front horizontal line H is illuminated by the horizontal portion irradiation pattern P2, the contrast with the road surface portion irradiation pattern P1 is reduced, and the visibility of an obstacle approaching the vehicle from a distance is improved. In addition, for vehicles according to the present invention
The lamps are not limited to the fog lamps described above.
It can also be applied to other lamps,
Modifications can be made according to the nature.

[0013]

As described above, the vehicular lamp according to the present invention is constructed as described above. Therefore, the conventional illumination pattern for illuminating the front of the vehicle by the prism steps formed on the outer cover.
The front horizontal line can be illuminated at the top of the vehicle, so that the horizontal line does not become extremely dark against illumination of the road surface near the vehicle, and pedestrians and other
It is possible to improve the driver's visibility with respect to the obstacle and to ensure the safety in running the vehicle . Also, outer cover
Design line formed by the above prism step on the surface of
And the appearance of the vehicle lamp can be improved.
The effects obtained by implementing the present invention are extremely large.

[Brief description of the drawings]

FIG. 1 is a partially cut-away longitudinal sectional view of an entire lamp showing an embodiment of a vehicle lamp according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2;

FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 2;

FIG. 5 shows a light distribution pattern diagram of the vehicular lamp according to the present invention.

FIG. 6 shows a light distribution pattern diagram of a conventional fog lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp body 2 Outer cover 4 Projector lamp unit 5 Convex lens 6 Casing 7 Reflector 8 Lighting bulb 9 Shade 13 Prism step 14 Diffusion step

Continuation of front page (56) References JP-A-2-216702 (JP, A) JP-A-1-159904 (JP, A) JP-A-62-195801 (JP, A) JP-A-4-357602 (JP) , A) Japanese Utility Model 2-69406 (JP, U) Japanese Utility Model 5-11202 (JP, U)

Claims (2)

(57) [Claims] 1. A substantially rectangular lamp having a structure in which an outer cover is provided on a front opening of a lamp body and a substantially parallel light beam is emitted and transmitted from a light source of a projector lamp unit built in the lamp body to the outer cover. Is located slightly above the optical axis position of the outer cover .
The transmitted light beam is projected onto the inner surface of the projector lamp unit.
A vehicular lamp characterized in that a fine prism step for refracting slightly upward with respect to an axis is formed. 2. The method according to claim 1, wherein the prism step is located above the optical axis.
It is specially provided that it extends in the left-right direction.
Vehicle lighting to be considered.