JPH0710478Y2 - Traffic lights by lane - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road traffic signal light, and more particularly to a signal light that emits a beam of light having a predetermined shape and gives a signal only to a target range such as a specific lane. is there.

[0002]

2. Description of the Related Art FIG. 2 shows an example of the configuration of a conventional signal lamp 90 of this type. For example, a light source 91 called a shield beam bulb and having a reflecting mirror 91a integrated therein is provided. The screen 93 on which the mask 92 is applied is irradiated with light rays, and the shape of the screen 93 is projected by, for example, a projection lens 94 in which a convex lens is Fresnelized. At this time, the shape of the mask 92 is as shown in FIG. By covering the portion other than the lane intended for display with an opaque paint or the like, the signal light 90 can be seen only from the intended lane and cannot be seen from other lanes. This will enable even more precise control of traffic.

[0003]

However, in the above-described conventional signal light 90, the shield beam bulb is adopted as the light source 91. First, this type of shield beam bulb is intended for general illumination. Therefore, a lens 91b having a lens cut such as a fish-eye lens is attached so that light spots are not generated on the irradiation surface, and the light from the reflecting mirror 91a is diffused and emitted to the outside. Therefore, the luminous flux utilization rate is not so high, which causes a problem that the signal lamp 90 cannot obtain sufficient brightness and becomes dark.

Secondly, since the shielded beam light bulb is extremely special at present and is difficult to obtain in the general market, it tends to take a lot of time and labor to repair the broken beam. The signal lamp 90 of this type, which requires quick repair, has problems that are difficult to maintain, and it has been a problem to solve these problems.

[0005]

As a concrete means for solving the above-mentioned conventional problems, the present invention provides a reflecting mirror having a light source, a screen shining as a surface light source by the reflecting mirror, In a traffic light for each lane, which comprises a projection lens for projecting a screen and irradiates a signal light only to a predetermined lane by masking the screen, the reflecting mirror is formed by a spheroidal surface and the screen is provided with the reflecting mirror. Lane disposed in the middle of the first focus and the second focus, and the mounting direction of the light source is substantially perpendicular to the rotation axis of the ellipsoid of revolution on which the reflecting mirror is formed. By providing another signal light, any of the above problems can be solved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 lane-specific signal light according to the present invention (hereinafter abbreviated as signal light 1). The signal light 1 includes a light source 2, a mask 3, a screen 4, and a projection lens 5. However, according to the present invention, the light source 2 according to the present invention is, for example, a house bulb, which is a general bulb, and the spheroidal reflecting mirror 6 is different. The socket 2a provided as a body for mounting the light source 2 has the reflecting mirror 6
It is supposed to be provided at a position substantially orthogonal to the rotation axis Z of the spheroidal surface.

Here, the reflecting mirror 6 will be described in more detail. The reflecting mirror 6 is formed to have an appropriately larger diameter than the screen 4, and at this time, the first focal point F1 is set to the above-mentioned. It is provided at a position that substantially matches the light source 2,
Since the second focus F2 is provided on the projection lens 5 side,
The light from the reflecting mirror 6 becomes a convergent light toward the second focus F2.

The screen 4 is provided midway between the first focus F1 and the second focus F2, and at this time, the diameter of the converged light of the screen 4 is substantially the same as the diameter of the screen 4. Since the light is emitted from the reflecting mirror 6, almost all the light from the reflecting mirror 6 passes through the screen 4.

Further, in the present invention, since the spheroidal reflecting mirror 6 is adopted, the light from the reflecting mirror 6 forms an image at the second focal point F2, and the screen 4 provided in the middle thereof. In this case, since a so-called out-of-focus image is not formed and a clear image is not formed, the socket 2a for supporting the light source 2 is provided with its mounting direction substantially perpendicular to the rotation axis Z of the spheroidal surface. It is supposed to be.

Next, the operation and effect of the signal lamp 1 of the present invention having the above structure will be described. First, by providing the spheroidal reflecting mirror 6, the light from this reflecting mirror 6 It converges toward the focal point F2, and a larger amount of light can be transmitted to the screen 4. Since this increases the surface brightness of the screen 4, the projected image by the projection lens 5 naturally becomes bright, and the visibility of the signal lamp 1 is improved.

Further, since the reflecting mirror 6 has a spheroidal surface and the screen 4 is provided between the first focus F1 and the second focus F2, the screen 4 is out of focus with respect to the reflecting mirror 6. In this state, the correlation between the shape of the reflecting mirror 6 and the shape of the light beam projected on the screen 4 is reduced, so that the light source 2 is supported without causing such uneven brightness on the screen 4. The socket 2a is attached from a direction perpendicular to the rotation axis Z, that is, from the side, so that the depth dimension of the signal lamp 1 can be shortened.

Incidentally, in actual implementation, it is possible to further reduce the occurrence of luminance unevenness on the screen 4 by adjusting the positions of the light source 2 and the first focus F1 by appropriately shifting them. Further, the position of the screen 4 can be adjusted for the same purpose.

[0013]

As described above, according to the present invention, the reflecting mirror is formed by the spheroidal surface, the screen is arranged between the first focus and the second focus of the reflecting mirror, and the light source of the light source is provided. Since the mounting direction is set to be a direction substantially perpendicular to the rotation axis of the spheroid surface on which the reflecting mirror is formed, first of all, light having a higher brightness than that of the converging spheroid reflecting surface is used. Can be transmitted to the screen,
As a result, the lane-specific signal lamp that can obtain a brighter projected image has an excellent effect of improving the visibility.

Further, by making the light source and the reflecting mirror separate, it is possible to use a light bulb such as a house ball that is easily available on the market as the light source, simplifying maintenance and reducing down time. As the thing which does not occur, it also has an excellent effect in improving the practicality of this kind of signal lamp.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a traffic light for each lane according to the present invention.

FIG. 2 is a cross-sectional view showing a conventional example.

FIG. 3 is a plan view showing a main part of a conventional example.

[Explanation of symbols]

 1 ... Traffic light for each lane 2 ... Light source 2a ... Socket 3 ... Mask 4 ... Screen 5 ... Projection lens 6 ... Reflecting mirror Z ... Rotating axis of spheroid F1 ... First focus F2 ... Second focus

Claims (1)

[Scope of utility model registration request] 1. A reflecting mirror provided with a light source, a screen shining as a surface light source by the reflecting mirror, and a projection lens for projecting the screen, and by masking the screen, only a predetermined lane is formed. In a traffic light for each lane that emits signal light, the reflecting mirror is formed with a spheroidal surface, the screen is arranged between the first focus and the second focus of the reflecting mirror, and the mounting direction of the light source is A traffic light for each lane, wherein the traffic light is arranged in a direction substantially perpendicular to the rotation axis of the ellipsoid of revolution on which the reflecting mirror is formed.