JP2556160Y2 - Signal indicator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal indicating lamp using a light emitting diode as a light source, and more particularly to an improvement for improving the visibility of a light source.

[0002]

2. Description of the Related Art A signal indicator is installed, for example, in connection with a production line in a factory. By illuminating the light source of the signal indicator light continuously or intermittently, it is possible to notify the operator of troubles in the process, shortage of parts, and the like.

[0003] In the above-mentioned signal indicating lamp, an incandescent lamp is typically used as a light source. On the other hand, a light emitting diode may be used instead of an incandescent lamp.
According to the light-emitting diode, it is possible to solve the problem of incandescent bulb inevitably encountered in an incandescent light bulb and to reduce power consumption. Light emitting diodes are smaller than incandescent lamps.

[0004] However, the light emitting diode tends to have a shortage of light quantity as compared with the incandescent lamp, and has relatively strong light directivity. Particularly, in the case of a signal indicator, the lighting state of the light source must be visible from all directions around the signal indicator. Therefore, when a light emitting diode is used as a light source, one light source is constituted by a plurality of light emitting diodes to compensate for the above-mentioned drawbacks, and a set of these light emitting diodes gives visibility from all directions. I have.

[0005]

However, as described above, when one light source is constituted by a plurality of light emitting diodes, the advantage of the small size of the light emitting diodes is lost.

[0006] On the other hand, with the expansion of the use of such signal indicators, various types of signal indicators are required.
For some applications, for example, it is required to realize an extremely small signal indicator.

In such an extremely small signal indicator, it is advantageous to use a light-emitting diode which is originally small as a light source. However, it is not possible to use a large number of light-emitting diodes. Even when only a single light emitting diode is used, improvement for improving visibility from all directions is desired.

[0008] Therefore, an object of the present invention is to improve the above-described visibility from all directions in a signal indicator lamp using a light emitting diode as a light source.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a signal indicating lamp using a light emitting diode as a light source, and is provided with the following structure in order to solve the above technical problem. And

[0010] That is, the signal indicating lamp according to the present invention is:
The device includes a parabolic mirror arranged to position the light-emitting portion of the light-emitting diode at its focal point, and a conical mirror arranged at a position facing the parabolic mirror. The apex of the conical mirror is directed toward the parabolic mirror, and the central axis thereof is positioned on the same straight line as the central axis of the parabolic mirror. The light emitting diode is oriented such that its light directing direction passes through the apex of the conical mirror. Further, the surface of the conical mirror is formed with a number of slits extending radially from the apex.

[0011]

According to the present invention, the light-emitting portion of the light-emitting diode when viewed from the conical mirror side can be made large due to the reflection effect on the parabolic mirror. Also, the light reflected from the parabolic mirror and the direct light from the light emitting diode are directed to the conical mirror, and by being reflected on the conical mirror, these lights are directed in all directions. . Also, since a large number of slits extending in the radial direction from the apex are formed on the surface of the conical mirror, the reflection on the conical mirror is irregular reflection. Therefore, when viewed from the periphery of the signal indicator light, it is visually recognized as if light is emitted from the conical mirror itself.

[0012]

Therefore, according to the present invention, all or almost all of the light emitted from the light emitting diode is directed to the conical mirror and is irregularly reflected all around the conical mirror. And also solves the problem of unidirectionality of light from the light emitting diode, so that the visibility of the signal indicator from all directions can be improved.

[0013]

FIG. 1 is a front view showing a signal indicating lamp 1 according to an embodiment of the present invention, and a part thereof is shown in a sectional view.

The signal indicator lamp 1 has a support pipe 2 fixed to an appropriate device for installing the signal indicator lamp. A socket 3 is provided at an end of the support pipe 2. A light emitting diode (LED) 4 serving as a light source is arranged inside the socket 3. Further, a parabolic mirror 5 is arranged in the socket 3 so that the light emitting portion of the LED 4 is located at the focal point.

A glove 6 made of a transparent material is screwed into the socket 3. In the globe 6, a conical mirror 7 is arranged, and this conical mirror 7 is opposed to the parabolic mirror 5 described above. The conical mirror 7 has its vertex directed toward the parabolic mirror 5 and its central axis located on the same straight line as the central axis of the parabolic mirror 5. The LED 4 has a light directing direction of the conical mirror 7.
Is directed through the vertex of. Further, the surface of the conical mirror 7 has a number of slits 8 extending radially from the apex.
Is formed. These slits 8 are provided, for example, by forming score lines on the surface of the conical mirror 7.

In the above-described configuration, the light emitted from the LED 4 reaches the conical mirror 7 directly or is reflected by the parabolic mirror 5. In the conical mirror 7, LE
The light from D4 is directed in the entire circumferential direction, and the light is diffusely reflected by the slit 8. Thus, a substantial part of the surface of the conical mirror 7, that is, the entire surface or almost the entire surface is illuminated by the light from the LED 4, and the conical mirror 7 itself can be visually observed as if it were illuminated.

In this manner, the visibility of the signal indicator lamp 1 from all directions is improved. In order to further improve the visibility, the globe 6 is cut with a lens or the surface of the globe 6 is rubbed. You may make it comprise a rough surface like glass.

[Brief description of the drawings]

FIG. 1 is a front view showing a signal indicator light 1 according to an embodiment of the present invention, and a part thereof is shown in a cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Signal-indicating light 4 Light-emitting diode 5 Parabolic mirror 7 Conical mirror 8 Slit

Claims (1)

(57) [Scope of request for utility model registration] 1. A signal indicator light using a light emitting diode as a light source, wherein a parabolic mirror is arranged so as to position a light emitting portion of the light emitting diode at a focal point thereof, and a parabolic mirror is arranged at a position facing the parabolic mirror The conical mirror is provided such that its apex is directed toward the parabolic mirror and its central axis is located on the same straight line as the central axis of the parabolic mirror. The light emitting diode is oriented so that its light directing direction passes through the vertex of the conical mirror, and a plurality of slits extending radially from the vertex are formed on the surface of the conical mirror. Signal indicator light characterized by the above.