JPH0394292A - Display lamp such as signal lamp - Google Patents

Abstract

PURPOSE:To improve the visibility by storing a light emission unit which has a light source and a multiple layer of photoconductors formed by cutting conically the upper part of a column body made of a light-transmissive material in a globe. CONSTITUTION:The photoconductors 2 laminated above the light source 1 in layers are formed by cutting the upper parts of column bodies made of light transmissive materials in a conic shape 20 and the light emission unit A consists of the light source 1 and the photoconductors 2 in the layers and is held and stored in the globe 4 by chassis 3 and 3'. Therefore, light from the light source 1 is guided to the layers of the photoconductors 2, reflected by the conic cut parts, and scattered, so that the light is emitted out of the globe 4 in all directions. Consequently, the light is projected outward by the conductors with good visibility.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an indicator light such as a signal light that diffuses light from a light source and projects the light into the surrounding area.

<Prior art and problems to be solved by the invention> As shown in Fig. 3, for conventional indicator lights, especially signal lights, an incandescent bulb (50) serving as a light source is attached to a socket (5l), and a chassis (52 ), stacked as one unit in multiple stages, connected with several pipes (53), and housed in the globe (54) as a multilayer of these units. Ta.

However, since each unit relied only on the light source to emit light, it became a point light source and had the disadvantage of low visibility.

Furthermore, when the light source is an incandescent bulb, the heat generated is high and the filament is likely to break, adding to the trouble of having to replace it.

Therefore, attempts were made to replace the light source with an incandescent bulb and use a light emitting diode (for example, Utility Model Application No. 60-87089).
(Refer to Japanese Utility Model Publication No. 62-78770, etc.), indicator lamps with a structure that relies heavily on the light source have a limit in improving the visibility of the light from the light source; We have come to the realization that the challenge is to improve the optical means.

Therefore, the present invention has been made with the object of solving the above-mentioned problems by sufficiently devising and improving the light guiding means in order to more effectively diffuse the light from the light source.

Means for Solving the Problem> In order to achieve the above object, the structure of the indicator light such as a signal light according to the present invention includes a light source and a guide having a conical cutout in the upper part of a cylindrical body made of a translucent material. The present invention is characterized in that a light emitting unit is formed by a plurality of layers of light bodies, and this light emitting unit is housed within a globe.

The light emitting unit may have a multilayer structure.

Effects> In the case of the present invention with the above configuration, in the light emitting unit, light from the light source is guided to the multi-layered light guide, which has a conical cutout at the top of a cylinder made of a transparent material, and the light from the light source is guided through the conical cutout. By being reflected by the notch, scattered and emitted over 360 inches outside the globe, the light is projected outward for each light guide, making it highly visible. become.

In particular, if the light emitting units are stacked in multiple layers, the light projecting effect will be further doubled.

Embodiments Next, embodiments of the present invention will be illustrated below with reference to the drawings.

(1) is a light source, and since LED generates little heat and does not break the filament, it can be suitably used as a long-life light source.

(2) is a light guide laminated in multiple layers above the light source (1), and each light guide (2) is an upper part of a cylindrical body made of glass, resin material, or other translucent material. The light source (1) and the multilayer light guide (, 2) constitute a light emitting unit (^).

The light guide (2) may have any number of stacked layers, but the figure shows three layers as an example, and the light emitting unit (A) is the light source (1).
and a light guide (2) are held and housed in the globe (4) by the chassis (3) (3').

Furthermore, as a light emitting unit (A), in addition to one set,
A plurality of light emitting units (A) may be stacked in a structure (see FIG. 2), in which case the light emitting unit (A) is located within the globe (4),
It is sufficient if they are connected by a globe or a chassis.

Note that the globes (4) may be laminated in multiple stages using colored transparent materials corresponding to each light emitting unit (A), and each globe (4) may be made of a known ribbed material with a high diffusion effect for light. (Fresnel type) is preferable.

The light guide (2) in the light emitting unit (A) described above may have a flat bottom surface, but if it is formed into an appropriate convex lens shape, it is effective in letting the LED light enter, and it is compatible with the conical notch. This is preferable from the viewpoint of stability when multiple layers are stacked.

It is also possible to use a light source other than LEDs, such as an incandescent power source.

For indicator lights such as signal lights with the above configuration, the light source (1
) is guided through a multi-layered light guide (2), and is separated by a conical (20) notch at the top of the light guide (2) in a horizontal direction (horizontal or approximately horizontal direction). In particular, in the conventional example, only the light source light can be seen from all directions, but in this invention, the light can be emitted 360' in the lateral direction, and it can be seen from any of the 360' directions. This can improve visibility.

In addition, the conical notches in each part of the light guide in the stacked light emitting units can be adjusted by adjusting the angle of the notch so that the light is emitted laterally, diagonally upward, and diagonally downward. .

Therefore, it is possible to provide a signal light suitable for a desired usage mode.

Furthermore, it is also possible to install a diagonal reflector (not shown) above the light guide at the top to reflect the light projected upward laterally.

The present invention can also be implemented as a lighting lamp other than a signal lamp.

Effects of the Invention> As described above, according to the present invention, in the light emitting unit, 1
Even if a single light source is used, the light guide can project light as if there were multiple light sources, and in the horizontal direction, the light can be emitted over a 360° range using the conical cutout of the light guide, making it highly visible. Even if the light source is an LED, sufficient visibility can be achieved. Even with one or a small number of light sources, visibility is improved due to the effect of the light guide's emission point, and the number of parts is small and the structure is simple and cost-effective. The benefits can also be significant.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention, FIG. 2 is a schematic sectional view, and FIG. 3 is a schematic sectional view of a conventional example. (1)...Light source such as LED, (2)...Light guide, (20)...Cutted conical part, (3)...
Chassis, (4)...Glove.

Claims (1)

[Claims] 1. A light source and a cylindrical body made of translucent material. A multilayer light guide with a conical cutout at the top. This light emitting unit is used as a light emitting unit. The knit is contained within the glove. An indicator light such as a signal light, which is characterized by: 2. The above claim in which the light emitting unit is composed of multiple layers. Indicator lights such as signal lights described in Section 1.