JPS5911499A - 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 INDUSTRIAL APPLICATION The present invention relates to a light device used in road traffic signals and the like.

Conventional configurations and their problems In general, signal lamps, such as road traffic signal lamps, are
As shown in FIG. 1, it mainly consists of a reflecting mirror 1° lens 2. and a light bulb 3. Note that FIG. 1aI'i is a sectional view of a conventional lamp, and FIG. 1b is a front view.

The reflecting mirror 1 is a parabolic mirror of revolution with a focal point at F, and its surface is electrolytically polished or chemically polished to +16 to obtain high reflectance and specularity, or It is constructed by applying treatments such as aluminum vapor deposition on gold or resin.

- Tsuba Lens 2 is made of glass or resin,
It has the function of controlling the direct light from the light bulb 3 and the reflected light from the reflecting mirror 1 in a predetermined direction, and also functions as a color filter and dust prevention function. Further, the light bulb 3 is fixed so that the light emitting center is located near the fish collection F of the reflecting mirror 1.

By the way, when a car driver or a pedestrian looks at a traffic light 1, they see the shine from a light bulb 3 on a reflecting mirror through a lens 2 provided in front of the light bulb 3. 1st edition - Required characteristic conditions for lamps include appropriate light distribution (luminous intensity distribution), appropriate chromaticity, and uneven brightness (uneven brightness and darkness) on the light emitting surface (lens surface).
One example is that there are few.

(4) As a weight to reduce uneven brightness on the light emitting surface of the lamp, the inner surface of the bulb is coated with white light bulb-shaped protrusions (
The light is diffused appropriately by providing stippling (stippling) or by applying fine cut ink 4 as shown in Figure 1. However, the more diffusive the light bulb and lens becomes, the more difficult it becomes to control the light, and the more difficult it becomes to obtain the luminous intensity in the central axis direction (central luminous intensity), which is the most important for signal lights.

When a transparent bulb or a twisted transparent light bulb is attached to a conventional signal lamp, the light 5 emitted from the filament becomes light 6 parallel to the optical axis zz', as shown in Figure 2, so the central luminous intensity is increases significantly. However, when this signal light is viewed from an oblique direction slightly off the optical axis, only a portion 7 of the lens surface appears to shine brightly, as shown in Figure 3a. In addition, when the light bulb is attached a little off from the predetermined position, a ring-shaped bright and dark pattern 8 appears even from the front of the signal light, as shown in FIG. For this reason, transparent light bulbs cannot be used in conventional signal lights.

As shown in FIG. 4, the signal lamp device 9 is installed so that the optical axis zz' is substantially horizontal. Therefore, the necessary radiation angle range for the borrowed light is below the horizontal axis 00' (range A in Figure 4), and the light emitted to the -'2 side (range B) is completely unnecessary. It is. However, in conventional signal lights, the emitted light is emitted above the horizontal axis oO' and is not emitted below the signal light. 400-45 left and right
°), relatively little light is emitted, and the light utilization rate is very low. Therefore, in order to obtain the characteristics necessary for a GM'j lamp, a bulb with a large wattage must be used.

1.Considering the following points 1.
-136862) has been proposed. However, this one
, ] Lamp - This is a lamp in which a large number of local reflecting mirrors, each with a vertical shape, are scattered over the entire surface of the mirror, and is difficult to manufacture.

): In order to see the effect of the arrangement of local reflecting mirrors scattered throughout f11, we divided the anti-q dimensional mirror into three along the radial direction, and Reflector reflection
・As a result of measuring the light distribution three times with the 1 ratio close to 0, it was found that the local reflectors scattered within 5 crfL in the radial direction on the light bulb side of the 1-reflection interface had a large influence on the ambient luminance by 5 degrees. It was confirmed that there is. As a result, the local reflecting mirrors do not need to be scattered over the entire main reflecting mirror surface, but may be scattered at the positions indicated by 1F, which have a large influence on the peripheral luminous intensity.

OBJECTS OF THE INVENTION The present invention takes into account the above-mentioned problems of the prior art, and aims to reduce unnecessary light as a signal light and improve the light utilization efficiency.

Composition of the invention In order to achieve the above-mentioned objective 1, the present invention provides a main reflecting mirror.

The lens provided on the front side of this main reflecting mirror,
A signal light consisting of a light bulb disposed between the f-mirror and the lens, and an auxiliary reflector disposed between the main reflector and the light bulb, and in which local 9-inch mirrors are dispersed over the entirety of the auxiliary reflector. This is the structure of the vessel.

DESCRIPTION OF ACTUAL I/iIΣ EXAMPLE Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG.
Between the self-reflecting mirror 11 and the light bulb 12, there is a main reflecting mirror 10) (
An auxiliary reflecting mirror 13 having a focal point is arranged. ? The lIi auxiliary reflection mirror 13 has a +l"i structure in which one local reflection mirror 15 is dispersed over the entire auxiliary reflection mirror surface 14 having a smooth surface. The 1 local reflection mirror 15, the main reflection mirror surface 11, and the hli auxiliary reflection mirror The curvature is smaller than that of the mirror surface, and the shape is vertically asymmetric, with the lower part being convex and the rounded or 1-side part being concave. mirror 1
It can be easily produced by dispersing it into 11 and 2 when molding 3 and 7-2.

Figure 5 (d, 1-antiq-+mirror surface 11. Let the mirror surface 14 be a rotating parabolic mirror, and let the 1 local anti-q 1 mirror 15 be approximately ゛1'', an instantaneous mirror 7) This figure shows the reflection path of the light when the reflection q=+mirror+11. The light bulb 12 is attached so that the light emitting center (filament center) of the light bulb 12 is located at the confocal point F of the auxiliary qt mirror 13, and the filament shape is U-shaped when the lamp device is viewed from the iF direction. By attaching the filament (not shown) to the main reflecting surface 11 of the main reflecting mirror 10 and the auxiliary reflecting mirror 13
The light 16°1γ incident on the auxiliary reflecting surface 14 of the main reflecting surface 11. After being reflected by the auxiliary reflecting surface 14, the light becomes 1.8°19 approximately parallel to the optical axis zz', increasing the central luminous intensity.

On the other hand, the lights 20 and 21 that have entered the local reflector 15 are downward lights 22 and 23 that are slightly away from the optical axis zZ', respectively.
This increases the luminous intensity below the horizontal.

Furthermore, the filament shape of the light bulb 12 is changed to U as described above.
By forming it into a letter shape, it is possible to achieve a symmetrical light distribution in the horizontal direction. ′! Furthermore, by using the band mirror sculpt R, more light is reflected on the reflective surface and goes forward, making it easier to control the light.

If you look at a signal lamp with a structure like this from the front, you will see that the main reflecting mirror surface 11. Parts of the reflective surfaces of the auxiliary reflective mirror surface 14 and the local reflective mirror 15 appear to be shining. Moreover, when viewed from an oblique direction shifted from the optical axis zz', the main reflecting surface 11. Auxiliary illegal surface 1
4 becomes dark, but 1y of local reflector 16! Any part of the It surface shines, so it looks like a spot on the metal reflecting mirror. However, by selecting an appropriate size and number of local reflecting mirrors to be 1; fJ, the lens surface can be made to appear uniformly illuminated at an actual distance of m4.

The more the area of the local reflecting mirror surface relative to the entire auxiliary reflecting mirror surface becomes 11), the more the scattered component increases, and the center luminous intensity decreases relatively. Furthermore, as the curvature of the local reflector is made smaller, the angle range in which the aperture IX mirror appears to shine becomes wider, and the center luminous intensity decreases.

The shape of the local reflector is ゛1 shown in Fig. 5 a and b.
′: In addition to the simple shape, it may be polyhedral, spherical or elliptical, and the same result can be obtained with either convex or concave surfaces. Depending on the size and number of local reflecting mirrors (i.e., the area occupied by the local reflecting mirror surface on the auxiliary reflecting mirror surface: 15) and their shape (1-f), the light distribution characteristics of the lamp and the brightness characteristics of the lens surface will be large. Change.

11-3 If the size of the partial reflecting mirrors is constant, the smaller the number of local reflecting mirrors, the higher the central luminous intensity will be, but the distance between the local reflecting mirrors will become wider, causing mottling on the lens surface. It looks like This may increase discomfort and make it difficult to see, especially at close distances. This is because our eyes have particularly good visual acuity in central vision (approximately 2 degrees of visual angle) and are able to distinguish even the smallest objects individually. Traditional reflector.

Using a lens, we investigated the light distribution characteristics of the Shinzu light and the brightness characteristics of the lens surface, and conducted an experiment to evaluate visual ability.As a result, the area ratio of 1 local reflecting mirror to the total mirror surface of the anti-9.1 mirror was 10. %～
50%, and when the distance between the local reflectors (Ll or L2 in Fig. 5) is less than or equal to the lens diameter, the specified light distribution characteristics can be obtained even if a transparent bulb is used, and the light distribution is spotty. It was confirmed that the discomfort caused by the appearance of shining was eliminated, and that uneven brightness on the lens surface could be reduced to a level that does not pose a practical problem.

Effects of the Invention As described above, the present invention uses a band mirror type light bulb by attaching an auxiliary reflector in which a large number of local reflectors each having a slightly asymmetrical shape are scattered between the main reflector and the light bulb. Because of this configuration, the following effects can be obtained.

(1) New/Efficient lamps can be made using a simple method without having to make a single device.

(2) Since 9 can be efficiently controlled, it becomes possible to emit more light towards JJ, who is a necessary lamp for believing.

(3) Effects equivalent to those of conventional lamps can be obtained with a lower wattage Vanodmira type light bulb, making it possible to save power by 1.

[Brief explanation of the drawing]

Figures 1a and b are diagrams showing the structure and light path of a conventional signal lamp, respectively, and its front view, and Figure 2 is the reflection of light when a transparent light bulb is used in a conventional signal lamp. Fig. 3 is an explanatory drawing showing the route, and shows the state of the shine of the lens surface of the Shintsut'l device shown in Fig. 2.
Moreover, the same figure is a view seen from the front direction. Fig. 4 is an explanatory diagram showing the installation situation of the signal lamp device and the radiation angle range necessary for the signal lamp, Figs. Figure b is a front view of the structure of a light fixture equipped with auxiliary reflecting mirrors having a large number of scattered mirrors, and a reflection path of light. 10... Main reflecting mirror, 11... Main reflecting surface, 12
...Light bulb, 13, 13'...Auxiliary reflector, 14
...Auxiliary reflecting surface, 15.15'...Local reflecting mirror.

Claims (7)

[Claims] (1) 1-Reflector, a lens provided in front of this 1:9 diagonal q mirror, -AiI y, light bulb placed between the Q-j mirror and the lens, 1-day reflection It is characterized by comprising an auxiliary reflecting mirror disposed between a mirror and the light bulb, and having local reflecting mirrors dispersed over the entirety of the auxiliary reflecting mirror.
A lantern. (2)Special+il';i? f seeking no 1llj111HJ 1
tn record, t no shin' / 3 In the lamp, the opposite surface of the three-way mirror 9 and the auxiliary reflection mirror 1ni have a confocal, and the) 11 smooth surface is A borrowed light fixture featuring Toyo, a rotating mirror that rotates. (3) Particularly, in the rental lamp according to claim 1, the local reflector is vertically asymmetrical, and the lower part is convex.
A signal light device characterized by being 1no. (4) Special range of tr[-5-l'4 In the Shinko lantern described in item 1, the 116th reflection boundary is -1-lower asymmetrical and the upper part is 1"l +f+i 'l'< A signal light device characterized by: (5) In the borrowed lamp set forth in claim 1,
The size of the auxiliary reflector is 10% to 30% of the main reflector in terms of area ratio.
% of the traffic light equipment. (6) In the signal lamp according to claim 1,
The size of the local reflector is 10% to 5% of the auxiliary reflector in terms of area ratio.
A signal light device that is characterized by occupying 0%. (7) In the signal lamp according to claim 1,
A signal light device characterized by using a light bulb or a band mirror type light bulb.