JPH11283407A - Vehicle lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a design having keynote property in one direction, i.e., either in a horizontal or vertical direction, while maintaining predetermined light distribution. SOLUTION: In an indication lamp 1 for an automobile, having a light source bulb 5 arranged in a lamp room 4 partitioned by a lamp body 2 and a lens 3 attached to the lamp body, and having a reflector 6 formed on the surface of the lamp body opposite to the lens, the lens has horizontally elongated fisheye steps 7 and the reflector is formed by a cylindrical step 8 extending in a direction perpendicular to the longitudinal direction of the fisheye steps, i.e., in the vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel vehicular lamp. More specifically, the present invention relates to a technique for realizing a design having a basic characteristic in one of a horizontal direction and a vertical direction while maintaining a predetermined light distribution performance.

[0002]

2. Description of the Related Art In a vehicular lamp, for example, an automobile sign lamp, in order to obtain a spread of light distribution vertically and horizontally,
Conventionally, a parallel light beam is obtained by a parabolic reflector, and the parallel light beam is diffused up, down, left, and right by a fisheye step formed on a lens.

[0003]

By the way, in the conventional vehicular lamp, the fisheye step has the same size in the vertical and horizontal directions, so that when viewed from the front, it becomes a grid-like design. In addition, the lighting fixtures for the respective vehicles did not look good.

Accordingly, an object of the present invention is to realize a design having a basic characteristic in one of a horizontal direction and a vertical direction while maintaining a predetermined light distribution performance.

[0005]

According to the present invention, there is provided a vehicular lamp in which a light source is disposed in a lamp chamber defined by a lamp body and a lens attached to the lamp body. A vehicular lamp in which a reflector is formed on a surface of a lamp body facing a lens, wherein the lens has a fish-eye step in which either the horizontal direction or the vertical direction is elongated, and the reflector has a length corresponding to the length of the fish-eye step. It is formed by a cylindrical step extending in a direction perpendicular to the direction.

Therefore, in the vehicular lamp according to the present invention, the fisheye step formed on the lens is elongated in either the horizontal direction or the vertical direction, so that the fisheye step is formed in the horizontal or vertical direction when viewed from the front. A design having a fundamental characteristic in any one direction can be obtained, and the cylindrical step formed on the reflector extends in a direction perpendicular to the longitudinal direction of the fisheye step. By correcting the deviation in the diffusion direction, a predetermined light distribution can be obtained.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicular lamp according to an embodiment of the present invention. In the illustrated embodiment, the present invention is applied to a traffic light for a vehicle.

The sign light 1 for an automobile is defined by a lamp body 2 having a front opening, a lens 3 attached to the lamp body 2 so as to cover the front opening, and a lamp body 2 and a lens 3. A light source bulb 5 is provided in the lamp chamber 4 and a portion 6 of the inner surface of the lamp body 2 facing the inner surface of the lens 3 is a reflector. On the rear surface of the lens 3, a fish-eye step having a projecting surface formed of a curved surface in all directions is formed, and on the reflector 6, a cylindrical step having a camber shape is formed.

The fish-eye steps formed on the back surface of the lens 3 are long in one of the horizontal and vertical directions. In this embodiment, the fish-eye steps 7 are long in the horizontal direction.
.. Are formed.

The cylindrical step formed on the reflector 6 is a cylindrical step extending in a direction orthogonal to the longitudinal direction of the fish-eye step formed on the lens 3. In this embodiment, the cylindrical step extends in the vertical direction. Are formed.

The light emitted from the light source bulb 5 and reflected by the reflector 6 is diffused in the horizontal direction by the cylindrical steps 8, 8,.
The light reflected by the cylindrical steps 8, 8,... And the light directly incident on the lens 3 from the light source bulb 5 are diffused vertically and horizontally by the fish-eye steps 7, 7,. A desired light distribution is obtained. The cylindrical steps 8, 8,... Formed on the reflector 6 are fish-eye steps 7, 7,.
Are extended in the direction perpendicular to the longitudinal direction of the light source, the light diffusion by the cylindrical steps 8, 8,... Corrects the bias of the light diffusion direction by the fisheye steps 7, 7,. Thus, a balanced light distribution can be obtained.

The cylindrical steps 8, 8,...
The formation pitch P8 of the fisheye steps 7, 7,.
N times or 1 / n of the formation pitch P7 in the longitudinal direction of
It is desirable that the value be multiplied (n is a positive integer). This makes it possible to make the entire surface of the lens 3 shine almost uniformly.

The sign light 1 for a vehicle has a basic tone in the horizontal direction when the sign light 1 for a vehicle is viewed from the front while securing a predetermined light distribution as described above. The design can be obtained, and a novel atmosphere that can not be found in conventional sign lights for vehicles can be created.

In the above embodiment, the longitudinal direction of the fish-eye steps is shown along the horizontal direction. However, it is needless to say that the fish-eye steps may be long in the vertical direction. In such a case, needless to say, the cylindrical steps formed in the reflector extend in the horizontal direction.

FIG. 5 shows a modification of the vehicular lamp of the present invention. In this modification, only the method of forming the fish-eye steps on the lens is different, and the other points are the same as those in the above-described embodiment. Therefore, only the different points are shown.

In this modification, the fisheye steps 9, 9,... Formed on the lens 3 are formed such that the arrangement in the longitudinal direction is shifted by half a pitch with respect to the adjacent row. That is, the fisheye steps 9, 9, ... in one row R1
Are shifted by half a pitch with respect to the array of the fish-eye steps 9, 9,... In the rows R2, R3 located above and below.

Thus, by shifting the arrangement of the fisheye steps 9, 9,... Between adjacent rows by half a pitch,
A more novel design can be expressed.

Note that the fisheye steps may be formed not in the longitudinal direction but in a direction perpendicular to the longitudinal direction, that is, by a half pitch between adjacent rows in the arrangement in the width direction.

Further, as shown in this modified example, a fisheye step block consisting of a plurality of rows in which the arrangement pitch of fisheye steps is shifted between adjacent rows, and a row of adjacent rows as shown in the above embodiment. A lens may be formed by mixing a plurality of rows of fish-eye step blocks in which the array pitch of fish-eye steps is not shifted between them.

In the above-described embodiment, the present invention is applied to a sign light for automobiles. However, the application of the present invention is not limited to a sign light for automobiles. It can be widely applied to

[0021]

As is apparent from the above description, the vehicular lamp of the present invention has a light source disposed in a lamp room defined by a lamp body and a lens attached to the lamp body. A vehicle lamp in which a reflector is formed on a surface facing a lens of a body, wherein the lens includes a fish-eye step in which one of a horizontal direction and a vertical direction is elongated, and the reflector is arranged in a longitudinal direction of the fish-eye step. Characterized by being formed by a cylindrical step extending in a direction orthogonal to.

Therefore, in the vehicular lamp according to the present invention, the fisheye step formed on the lens is elongated in either the horizontal direction or the vertical direction, so that the horizontal or vertical when viewed from the front is obtained. A design having basicity in one of the directions can be obtained, and the cylindrical step formed on the reflector extends in a direction orthogonal to the longitudinal direction of the fisheye step. A predetermined light distribution can be obtained by correcting the bias in the light diffusion direction.

Further, in the invention described in claim 2, the formation pitch of the cylindrical step is n times or 1 / n times (n is a positive integer) the formation pitch in the longitudinal direction of the fisheye step. As a result, the entire surface of the lens 3 can be illuminated almost uniformly.

Further, according to the third aspect of the present invention, since the fish-eye steps are formed at an opposite pitch from the adjacent fish-eye steps, a more novel design can be formed. .

It should be noted that the structures and shapes of the respective parts shown in the above-described embodiments and modified examples are merely examples of the specific embodiments to be carried out when carrying out the present invention. The technical scope should not be construed as limiting.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which the present invention is applied to a signpost for an automobile together with FIGS. 2 to 4, and FIG. 1 is a vertical sectional view.

FIG. 2 is a horizontal sectional view.

FIG. 3 is an enlarged rear view showing a part of the lens.

FIG. 4 is an enlarged front view showing a part of the reflector.

FIG. 5 is an enlarged rear view of a part of a lens showing a modification.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Signal light for vehicles (vehicle lamp), 2 ... Lamp body, 3 ... Lens, 4 ... Light room, 5 ... Light source bulb (light source),
6: reflector, 7: fish-eye step, 8: cylindrical step, P7: formation pitch of fish-eye step, P8 ...
Formation pitch of cylindrical step, 9 ... fish-eye step

Claims (3)

[Claims] 1. A vehicular lamp in which a light source is disposed in a lamp chamber defined by a lamp body and a lens attached to the lamp body, and a reflector is formed on a surface of the lamp body facing the lens. Wherein the lens includes a fish-eye step in which either the horizontal direction or the vertical direction is elongated, and the reflector is formed by a cylindrical step extending in a direction perpendicular to the longitudinal direction of the fish-eye step. Lighting fixtures. 2. The method according to claim 1, wherein the pitch at which the cylindrical steps are formed is set to be n times or 1 / n times (n is a positive integer) the longitudinal pitch of the fish-eye steps. Vehicle lighting. 3. The vehicular lamp according to claim 1, wherein the fish-eye steps are formed to be shifted by a half pitch with respect to the adjacent fish-eye steps.