JP2002032040A - Indicator light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicator light which eliminates the unevenness of the brightness of a display plate, eliminates the useless consumption of the direct light on the display plate and enables the improvement in the visibility of display characters and saving of electric power consumption. SOLUTION: The indicator light, which is disposed with a light source 2 and a reflecting plate 3 for reflecting the light of this light source 2 to the display plate 1 behind the display plate 1, is constituted by forming a front reflecting surface 4 for reflecting the light of this light source 2 toward the display plate 3 on the front surface of the light source 2 and reflecting the light to the front surface of the light source 2 to the display plate 1 through the front reflecting surface 4 and the reflecting plate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indicator light installed in a fire extinguishing system, for example, and more particularly to an indicator light capable of improving visibility and saving power.

[0002]

2. Description of the Related Art Conventionally, as an indicator light installed in connection with a fire extinguishing system, for example, there is an indicator light which is turned on when a fire extinguishing agent is discharged to a protective section or the like and which emits a character part by emitting red light. . The indicator light is a display plate that prevents light from transmitting except for a character portion, a light source disposed behind the display plate, and a reflector formed around the light source and reflecting light of the light source to the display plate. And a plate. In general, incandescent lamps and fluorescent lamps are used as the light source of the indicator light. However, since the power consumption is large, the capacity of the regular power supply and the emergency power supply is large, and the life span is short. Maintenance is frequently required. In order to cope with this, in recent years, an indicator lamp using a light emitting diode as a light source has been proposed.

[0003]

However, in these conventional display lamps, the display plate has uneven brightness.
In particular, in a display lamp using a light emitting diode, since the directivity of light to the front is strong, even if the reflector is embossed so that light is irregularly reflected, the display is directly irradiated from the front of the light emitting diode. There is a problem in that the light is too strong and a large unevenness occurs in the brightness of the display panel.

The present invention has been made in consideration of the above-mentioned problems of the conventional indicator lamps, and has been made to solve the problem of uneven brightness of the display panel.
It is an object of the present invention to provide a display lamp capable of eliminating waste of light directly radiating on a display panel, improving visibility of displayed characters, and saving power.

[0005]

In order to achieve the above object, an indicator lamp according to the present invention has a display in which a light source and a reflector for reflecting the light of the light source to the display are arranged behind the display. In the lamp, a front reflection surface is formed on the front of the light source to reflect the light of the light source toward the reflection plate, and the light to the front of the light source is reflected on the display panel via the front reflection surface and the reflection plate. It is characterized by the following.

In the display lamp of the present invention, the light to the front of the light source is reflected toward the reflection plate by the front reflection surface provided on the front of the light source, and further reflected to the display plate via the reflection plate. Therefore, the display panel is evenly illuminated to eliminate uneven brightness and eliminate the waste of light directly shining on the display panel.
It is possible to improve the visibility of displayed characters and save power.

In this case, a concave portion for accommodating the light source, a wing plate portion inclined from the vicinity of the light source to the display plate side, and a projection formed on the front surface of the light source are provided behind the display plate. A light-transmitting light guide plate for guiding the light of the light source is provided, a reflection plate is formed on the back surface of the light guide plate opposite to the wing, and a front reflection surface is provided on the tip end surface of the protrusion. Can be formed.

As described above, by transmitting the light through the light guide plate, the light from the light source can be more efficiently guided and reflected, whereby the display plate can be evenly illuminated and the displayed characters can be further visually recognized. It is possible to improve the performance and save power.

Further, the edge of the light guide plate can be covered with a reflection plate.

Thus, light can be effectively reflected and light leakage can be prevented.

Further, the front reflecting surface and / or the reflecting plate can be formed by sticking an aluminum-deposited film, an aluminum foil, a white diffusion film or another film having a reflecting surface.

Thus, the front reflecting surface and / or the reflecting plate can be easily formed at low cost.

Further, the front reflecting surface can be constituted by a triangular prism.

Thus, a part of the light can be transmitted from the front reflecting surface, and the light can be diffused over a wide area including the front surface of the front reflecting surface to uniformly irradiate the entire display panel. It can be formed inexpensively and easily.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an indicator light according to the present invention.

FIGS. 1 and 2 show a first embodiment of the indicator lamp of the present invention. The display lamp includes a display plate 1 having a translucent character portion 11, a light source 2 disposed behind the display plate 1, a reflecting plate 3 for reflecting light of the light source 2 to the display plate 1, and A front case 5 and a rear case 6 in which the display plate 1, the light source 2 and the reflection plate 3 are accommodated are provided.

On the front surface of the light source 2, a front reflecting surface 4 for reflecting the light of the light source 2 toward the reflecting plate 3 is formed, and the light to the front surface of the light source 2 is transmitted from the front reflecting surface 4 to the reflecting plate. The light is reflected on the display panel 1 through the display panel 3.

The display plate 1 is made of, for example, a synthetic resin plate made of a milky white polycarbonate resin or the like made of a polycarbonate resin which prevents light from transmitting except for characters, and a synthetic resin plate colored except for characters. In addition, the character part 11 can also be displayed by superimposing a non-translucent plate or a coloring plate from which characters are cut out and a milky white plate.

A large number of light sources 2 are arranged on the LED board 22 at substantially equal intervals in the width direction of the indicator light (the number of light sources 2 is not particularly limited.
) Light emitting diodes 21. In this embodiment, the light emitting diode 21 emits red light when lit, and the display characters on the display panel 1 emit red light.

The light emitting diode 21 is surrounded by a light guide plate 7 made of a colorless and transparent acrylic resin or the like. The light guide plate 7 includes a concave portion 73 for accommodating the light emitting diode 21, a pair of wing plate portions 71, 71 formed on the display plate 1 side above and below the light emitting diode 21, respectively, and a front surface of the light emitting diode 21. And a protrusion 72 formed so as to protrude, and is formed solidly and integrally, and the inside thereof is
Is transmitted. Also, the protrusion 7
2 has a V-shaped cross section so as to be substantially parallel to the wing plate portion 71. The height of the projection 72 is set such that a gap is formed between the projection plate 72 and the display panel 1 so that light from the reflection plate 3 enters between the distal end surface of the projection 72 and the display panel 1. .

On the other hand, the reflecting plate 3 is provided on each wing plate portion 7 of the light guide plate 7.
1, a white diffusion film such as an aluminum vapor-deposited film, an aluminum foil, and a white polyester film, and other films having a reflective surface are adhered to each other. Further, the film provided with the reflecting surface is also adhered to the edge of the light guide plate 7 such as the front end portion 74 of each wing plate portion 71 and the end surface 75 of the light guide plate 7, thereby effectively reflecting light and , Preventing light leakage.

The front reflection surface 4 is formed by attaching a white diffusion film such as an aluminum vapor-deposited film, an aluminum foil, a white polyester film, or another film provided with a reflection surface to the front end surface of the projection 72 of the light guide plate 7. Is formed,
A reflecting surface having a V-shaped cross section which is substantially parallel to the reflecting plate 3 is formed. By forming the reflection plate 3 and the front reflection surface 4 by attaching a film having a reflection surface, the reflection plate 3 and the front reflection surface 4 can be formed easily at low cost.

As described above, in the indicator lamp of the first embodiment, as shown in FIG. 1, the light to the front surface of the light source 2 is directed to the reflection plate 3 by the front reflection surface 4 provided on the front surface of the light source 2. Reflected
Further, since the light is reflected to the display panel 1 via the reflection plate 3, the display panel 1 is uniformly illuminated to eliminate unevenness in brightness. Visibility and power saving can be achieved.

The front reflecting surface 4 provided on the front of the light source 2
Is the portion of the display panel 1 located on the back, ie, the display panel 1
The light from the light source 2 is difficult to reach and slightly darkens only at the central portion in the vertical direction. Therefore, as shown in FIG. 3, it is desirable not to display the translucent character portion 11 in this portion. . The front reflecting surface 4 provided on the front of the light source 2 according to the display position of the translucent character portion 11 on the display panel 1.
Are vertically shifted, and the extension length of the upper and lower wing plate portions 71 can be changed accordingly. By the way, in the indicator lamp of the present embodiment, the position of the front reflecting surface 4 provided on the front surface of the light source 2 is shifted downward, and the upper blade plate 71 is adjusted accordingly.
Is formed to be longer than the extension length of the lower blade portion 71.

Further, by transmitting the light through the light guide plate 7, the light of the light emitting diode 21 can be more efficiently guided and reflected, thereby irradiating the display plate 1 more uniformly and displaying the display characters. It is possible to improve visibility and save power.

Then, the light emitting diode 21 as the light source 2
By using, the power consumption can be reduced, the capacity of the normal power supply and the emergency power supply can be reduced, the life of the light source 2 can be prolonged, and the maintainability of the indicator lamp can be improved.

FIGS. 4 and 5 show a second embodiment of the indicator lamp of the present invention. The display lamp includes a display plate 1 having a translucent character portion 11, a light source 2 disposed behind the display plate 1, a reflecting plate 3 for reflecting light of the light source 2 to the display plate 1, and It includes a front case and a rear case (not shown) in which the display plate 1, the light source 2, and the reflection plate 3 are accommodated.

On the front surface of the light source 2, there is formed a front reflection surface 8 for reflecting the light of the light source 2 toward the reflection plate 3, and the light to the front surface of the light source 2 is transmitted from the front reflection surface 8. It is configured to reflect light to the display panel 1 via the reflection plate 3.

The display panel 1 is composed of, for example, a synthetic resin plate made of a milky white polycarbonate resin or the like made of a polycarbonate resin, which prevents light from transmitting except for characters, and a synthetic resin plate colored except for characters. The light source 2 includes a large number of light emitting diodes 21 arranged on the LED board 22 at substantially equal intervals in the width direction of the indicator light.

The light emitting diode 21 is surrounded by a light guide plate 7 made of a colorless and transparent acrylic resin or the like. The light guide plate 7 includes a concave portion 73 that accommodates the light emitting diode 21 and a pair of wing plate portions 7 that are formed above and below the light emitting diode 21 so as to be inclined toward the display panel 1.
1, 71 and a projection 72 formed so as to protrude from the front surface of the light-emitting diode 21, and are formed solidly and integrally, and the light of the light-emitting diode 21 passes through the inside of the projection 72. It is configured to be able to. Also, the protrusion 72
Has a cross-section V so that the tip surface of the
It is cut in the shape of a letter. In addition, the wing plate parts 71, 71
It can be formed separately from the light guide plate 7 or by a member having no translucency.

On the other hand, the reflecting plate 3 is provided on each wing plate portion 7 of the light guide plate 7.
1 is formed by attaching a white diffusion film such as an aluminum vapor-deposited film, an aluminum foil, and a white polyester film, or another film having a reflective surface to the surface of the substrate 1. Further, the film having the reflecting surface is also attached to the extending portion 76 of each wing plate portion 71 extending forward, thereby effectively reflecting light and preventing light leakage. I have.

The front reflecting surface 8 is formed by forming the tip end surface of the projection 72 of the light guide plate 7 cut into a V-shaped cross section as one surface of a triangular prism. A parallel reflecting surface is formed. That is, in the second embodiment, the forward irradiation light is positively utilized by utilizing the directivity of the light emitting diode 21, and the wing plate portion 7 is used.
1 is reduced.

As described above, in the indicator lamp of the second embodiment, as shown in FIG. 4, light to the front surface of the light source 2 is directed to the reflection plate 3 by the front reflection surface 8 provided on the front surface of the light source 2. Reflected
Further, since the light is reflected to the display panel 1 via the reflection plate 3, the display panel 1 is uniformly illuminated to eliminate unevenness in brightness. Visibility and power saving can be achieved.
In particular, by forming the front reflection surface 8 with a triangular prism, a part of the light is transmitted from the front reflection surface 8 and the light is diffused over a wide area including the front surface of the front reflection surface 8 for display. It is possible to uniformly irradiate the entire surface of the panel 1, whereby the position of the front reflective surface 8 of the display panel 1 is also reduced.
Display can be performed.

Further, by transmitting the light through the projection 72 of the light guide plate 7, the light of the light emitting diode 21 can be more efficiently guided and reflected, thereby irradiating the display plate 1 more uniformly. In addition, it is possible to improve the visibility of displayed characters and save power.

The light emitting diode 21 is used as the light source 2.
By using, the power consumption can be reduced, the capacity of the normal power supply and the emergency power supply can be reduced, the life of the light source 2 can be prolonged, and the maintainability of the indicator lamp can be improved.

Although the embodiment of the present invention has been described above, it is also possible to use an incandescent lamp or a fluorescent lamp as the light source 2.
The configuration of the embodiment can be appropriately changed without departing from the gist of the present invention. Further, the indicator light of the present invention can be used as a warning light other than the fire extinguishing equipment, or as an indicator light other than the warning light.

[0036]

According to the indicator lamp of the present invention, the light to the front of the light source is reflected toward the reflector by the front reflecting surface provided on the front of the light source. In addition to eliminating the unevenness in brightness by uniformly illuminating the display panel, and eliminating waste of light directly shining on the display panel, it is possible to improve the visibility of displayed characters and reduce power consumption. it can. And, even when the light emitting diode is used as the light source, the indicator light of the present invention uniformly irradiates the display plate with light directly radiating from the front surface of the light emitting diode to the display plate to reliably reduce uneven brightness. It can reduce the power consumption, reduce the capacity of the regular power supply and the emergency power supply, extend the life of the light source, and improve the maintainability of the indicator light. It can be used for

Further, by transmitting the light through the light guide plate, the light from the light source can be more efficiently guided and reflected, thereby irradiating the display plate more uniformly and improving the visibility of the displayed characters. Power can be saved.

Further, by covering the edge of the light guide plate with the reflection plate, it is possible to effectively reflect light and prevent light leakage.

Further, by forming the front reflecting surface and / or the reflecting plate by attaching an aluminum vapor-deposited film, an aluminum foil, a white diffusion film or another film having a reflecting surface, the front reflecting surface and / or the reflecting plate can be formed. The reflection plate can be formed easily at low cost.

Further, by forming the front reflection surface with a triangular prism, a part of the light is transmitted from the front reflection surface, and the light is diffused over a wide area including the front surface of the front reflection surface. Can be uniformly applied, and the front reflecting surface can be formed easily at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of an indicator lamp of the present invention.

FIG. 2 is an exploded perspective view showing the indicator light of the embodiment.

FIG. 3 is a front view showing the display panel of the embodiment.

FIG. 4 is a sectional view showing a second embodiment of the indicator light of the present invention.

FIG. 5 shows an indicator light of the embodiment, (a) is a front view,
(B) is a plan view, (c) is a rear view, (d) is a side view,
(E) is a sectional view taken along line AA of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display board 2 Light source 21 Light emitting diode 22 LED board 3 Reflector 4 Front reflection surface 5 Front case 6 Rear case 7 Light guide plate 71 Wing board part 72 Protrusion 73 Depression 74 Tip part of wing board part 75 End face of light guide plate 76 Extension Installation part 8 Front reflective surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Daishiro Fujio 1-310 Kitahonmachi, Itami-shi, Hyogo F-term (reference) in Koatsu Corporation 5C096 AA05 BA01 CA13 CA14 CB07 CC06 CD01 CE01 FA02 FA03 FA07 FA08 FA09

Claims (5)

[Claims] 1. An indicator lamp comprising a light source and a reflector for reflecting light from the light source to the display plate, the indicator lamp being provided behind the display plate.
A front reflection surface is formed on the front of the light source to reflect the light of the light source toward the reflection plate, and the light to the front of the light source is reflected on the display panel via the front reflection surface and the reflection plate. Indicator light. 2. A recess for accommodating a light source, a wing plate portion inclined from the vicinity of the light source to the display plate side, and a projection formed to project from the front of the light source behind the display plate. By providing a light-transmitting light guide plate for guiding the light of the light source, a reflector is formed on the back surface of the light guide plate opposite to the wing, and a front reflection surface is formed on the tip end surface of the protrusion. The indicator lamp according to claim 1, wherein: 3. The indicator lamp according to claim 1, wherein an edge of the light guide plate is covered with a reflection plate. 4. The method according to claim 1, wherein the front reflecting surface and / or the reflecting plate is formed by attaching an aluminum-deposited film, an aluminum foil, a white diffusion film or another film having a reflecting surface. Indicator light according to 2 or 3. 5. The indicator lamp according to claim 1, wherein the front reflecting surface is constituted by a triangular prism.