JPH0352000A - Signal lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a signal lamp used as a signal at an intersection on a road, for example.

Conventional technology FIG. 4 is a schematic diagram of a conventional signal lamp device.

In FIG. 4, 51 is a light source lamp having a filament 51a inside, 52 is a reflecting mirror, and 53 is a light source lamp 5.
This is a diffusion lens placed in front of the lens. The reflecting mirror 52 also serves as a housing, and a light source lamp 5l and a diffusing lens 53 are attached to the reflecting mirror 52, respectively.

In this signal lamp, when the light source lamp 51 is turned on, a part of the light m emitted from the filament 51a is transferred to the reflecting mirror 5.
2, and further passes through the diffusion lens 53 and exits.
This light m is visually recognized by drivers and pedestrians.

Problems to be Solved by the Invention However, in the above-mentioned conventional signal lamp, sunlight 54,5
5 enters the interior from behind the driver or the like through the diffuser lens 53, a portion of the incident light 54, 55 is reflected by the surface of the light source lamp 51 and the light 54a155a1 and the surface of the filament 51a. light 54b,
55b, the light passes through the diffusion lens 53 and is emitted from the signal lamp unit again. For this reason, even when the signal lamp is off, drivers and pedestrians are under the illusion that the signal lamp is on, causing a phenomenon of false lighting. therefore,
In such a case, it becomes difficult to distinguish between red, green, and yellow signals, which poses a safety problem.

The present invention solves these conventional problems, and eliminates the false lighting of signal lamps caused by sunlight, and provides an advantage in that drivers and pedestrians can accurately confirm whether the signal lamps are turned on or off. The purpose of this invention is to provide a signal light device with a high level of performance.

Means for Solving the Problems In order to achieve the above object, the present invention includes a light source lamp, a diffusion lens disposed in front of the light source lamp, and a plurality of cylindrical lenses each provided in a planar manner. a pair of transparent plates arranged opposite to each other between the light source lamp and the diffusion lens with the optical axes of the cylindrical lenses being shifted from each other;
The light shielding plate includes a plurality of linear members disposed substantially on the optical axis focal point of the cylindrical lens on the side of one of the pair of transparent plates, respectively.

Function Since the present invention is constructed in this way, when sunlight enters the signal light device from behind a driver or pedestrian, it passes through a plurality of cylindrical lenses and is focused on the focal plane. A light shielding plate is placed on each focal plane of the cylindrical lens, which blocks sunlight from reaching the reflector or light source lamp in the lamp unit. Therefore, it has the effect of eliminating this false lighting caused by sunlight.

On the other hand, when the light source lamp is turned on, the light is emitted between cylindrical lenses formed on a pair of transparent plates, with their optical axes being shifted from each other. The light is emitted to the outside of the lamp through a light path, and has the effect of notifying drivers, pedestrians, etc. that the lamp is turned on.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 1 is a light source lamp having a filament 1a inside, 2 is a concave reflecting mirror, 3 is a diffusing lens, 4,
5 is a transparent plate, and 6 is a light shielding plate disposed between the transparent plates 4 and 5. The reflecting mirror 2 also serves as a housing, and a light source lamp 1, a diffusion lens 3, transparent plates 4 and 5 buttons, and a light shielding plate 6 are attached to the reflecting mirror 2, respectively.

The transparent plates 4 and 5 have a plurality of fine cylindrical lenses 4a and 5a each having a width of about 2 mm arranged in a plane, as shown enlarged in FIGS. 2 and 3. The cylindrical lenses 4a and 5a are arranged with their flat sides facing each other.

The two facing transparent plates 4, 5 and the respective optical axes 7, 8 of the cylindrical lenses 4a, 5a are arranged with their respective optical axes 7, 8 slightly shifted from each other. On the other hand, the light shielding plate 6 disposed between the two transparent plates 4 and 5 is made of a fine linear member with a width of about 0.4 mm. This light shielding plate 6 includes each cylindrical lens 4a that is buttoned on one transparent plate 4.
are respectively arranged at the focal planes of the transparent plates 5 and 5, which are then attached to the transparent plate 4, and are thereby held.

Next, the operation of the above embodiment will be explained. In the above embodiment, when sunlight 9, 10 is incident, it passes through the diffusion lens 3 and enters the transparent plate 4. Further, the sunlight 9 and 10 are concentrated at the light shielding plate 6, and the sunlight 9 and 10 are blocked by the light shielding plate 6. Therefore, the sunlight 9, 10 is the light source lamp 1
It cannot be reached by the mirror 21 and the reflector 21.

On the other hand, when the light source lamp 1 is turned on, a part of this light 11 is reflected by the reflecting mirror 2. The light then further enters the transparent plate 5 and is once focused at the focal plane l2 of the cylindrical lens 5a in the transparent plate 5. 1. At this time, since the light shielding plate 6 is placed at a position shifted from the focal plane 12, the light 11 that is once focused at the focal plane l2 enters the transparent plate 4 side without being cut by the light shielding plate 6. The light then passes through the transparent plate 4 and is emitted as a thousand lines of light. Therefore, this light 11 is visually recognized by drivers and pedestrians.

According to the embodiment described above, when sunlight 9, 10 enters from the rear side of a driver or pedestrian, it passes through the diffusion lens 3 and enters the transparent plate 4, and is then concentrated at the light shielding plate 6. be done. In addition, this light shielding plate 6 blocks sunlight 9 and 10 and prevents it from reaching the light source lamp 1 button and reflector 2 grooves, so it is possible to eliminate false lighting of the signal device due to sunlight 9 and 10. .

This allows drivers and pedestrians to accurately confirm whether the signal lamp is on or off, improving safety.

Effects of the Invention As is clear from the above embodiments, when sunlight enters a signal light device from behind a driver or pedestrian, the light passes through a plurality of fine cylindrical lenses and is focused on its focal plane. However, each of the cylindrical lenses has a light shielding plate placed at its focal plane, so sunlight is blocked here and does not reach the reflector or light source lamp in the lamp unit. Therefore, it has the advantage of being able to eliminate this false lighting caused by sunlight.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a signal lamp according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts of the lamp, Fig. 3 is an enlarged exploded perspective view of the main parts of the lamp, and Fig. 4 is a schematic configuration diagram of a conventional signal lamp device. 1... Light source lamp, 2... Reflector, 3... Diffusion lens, 4.5... Transparent plate, 4a, 5a... Cylindrical lens, 6... Light shielding plate, 7, 8 ...Optical axis of a cylindrical lens.

Claims (1)

[Claims] A light source lamp, a diffusion lens disposed in front of the light source lamp, and a plurality of cylindrical lenses are each provided in a plane, and the optical axes of the cylindrical lenses are shifted from each other so that the light source lamp and the diffusion lens are arranged in front of the light source lamp. a pair of transparent plates facing each other, and a plurality of linear members arranged corresponding to each other substantially on the optical axis focal point of the cylindrical lens on the side of one of the pair of transparent plates. A signal lamp device characterized by comprising a light shielding plate.