Indicator light

Abstract

To provide a pilot lamp capable of reducing the thickness of a light-emitting display portion, and capable of improving visibility in lateral direction.SOLUTION: A pilot lamp 1 includes a light-emitting display portion 2 which emits light using a light-emitting element as a light source. In the light-emitting display portion 2, a front surface 2aa which is an emission surface for the light of the light-emitting element is formed as a concave surface, and a back surface 2ab which is an incident surface for the light of the light-emitting element has an undulation portion 2aba of an annular and concentric array.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an indicator lamp for indicating the location of various disaster prevention facilities. [Background technology]

[0002] Indicator lights for indicating positions are provided in various disaster prevention facilities such as emergency alarm systems, automatic fire alarm systems, and fire hydrant systems. The indicator lights include a light-emitting display unit (called a "globe" or the like) that emits light using a light-emitting element as a light source (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 09-265594 Summary of the Invention [Problem to be solved by the invention]

[0004] Indicator lights are also installed on fire hydrant equipment for tunnels (road tunnels, etc.). Specifically, they are installed on fire hydrant boxes or fire extinguisher boxes installed on the side of the roadway (on inspection roads, etc.).

[0005] In tunnels constructed using the shield method, it is not possible to provide so-called "box cutouts" in the side walls for embedded installation of various devices. For fire hydrant boxes, fire extinguisher boxes, etc. to be installed in such tunnels, there is a demand for the devices to be thin, if they are to be installed exposed.

[0006] Conventionally, indicator lights are provided with a light-emitting display unit that protrudes significantly forward. When making a device thinner, it is possible to make the light-emitting display unit thinner. However, when the light-emitting display unit is made thinner, visibility from the side may be reduced. When an indicator light is actually installed on a device and used, for example, in a tunnel, the indicator light attached to the device is visible when passing through a car or walking along an inspection path, so the indicator light is often viewed diagonally or from the side rather than directly in front. Therefore, there is a demand for improved visibility from the side.

[0007] SUMMARY OF THE PRESENT DISCLOSURE In view of the above circumstances, an object of the present invention is to provide an indicator lamp that can reduce the thickness of a light-emitting indicator portion and can improve visibility from the side. [Means for solving the problem]

[0008] The present invention is an indicator lamp having a light-emitting indicator that emits light using a light-emitting element as a light source, and the light-emitting indicator has a front surface that is an emission surface of the light-emitting element formed as a concave surface, and a back surface that is an incidence surface of the light from the light-emitting element formed as a concave surface. While being formed as a convex surface, Circular and concentric arrangement Multi-column Formed as having undulations The width of each of the plurality of rows of undulating portions becomes shorter from the center side of the light-emitting display portion toward the outer periphery side. An indicator light characterized in that or an indicator lamp having a light-emitting indicator that emits light using a light-emitting element as a light source, the light-emitting indicator has a front surface that is an emission surface of the light-emitting element formed as a concave surface, and a back surface that is an incidence surface of the light from the light-emitting element formed as a convex surface, and is formed to have a plurality of rows of undulating portions arranged in a ring-like concentric shape, and the width of each row of the undulating portions increases from the center side of the light-emitting indicator toward the outer periphery. It is.

[0009] In this invention, Multi-column The undulating part of Each undulating part The shape may be such that the incident light is refracted toward the outer periphery. Multi-column The undulating part of Each undulating part It may be formed by an annular step, recess or protrusion. .Ma The above Multi-column The undulating portion may be continuous in a step-like manner in the radial direction. Effect of the Invention

[0010] In this invention, by making the front part of the light-emitting display part concave, it is possible to make the light-emitting display part thinner and to diffuse and emit light from the front part. Also, by making the back part of the light-emitting display part have undulating parts arranged in a ring-like and concentric manner, it is possible to refract the light incident from the back part to the outer periphery and increase the light diffused and emitted from the front part, thereby improving the brightness when viewed from the side.

[0011] Therefore, according to the present invention, an indicator lamp can be obtained that can reduce the thickness of the light-emitting indicator and improve visibility from the side. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a front view showing an example of an embodiment of an indicator light of the present invention, showing the front side, which is the light emitting side, of the light-emitting indicator portion. [Diagram 2] 4 is a rear view showing the rear side, which is the light incident side, of the light-emitting display portion of the above embodiment. FIG. [Diagram 3] FIG. 4 is a side view of the light-emitting display portion of the embodiment; [Figure 4] FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 2 is a perspective view showing the entire indicator lamp with the light-emitting display unit attached to the main body (containing light-emitting elements, etc.); [Figure 6] FIG. 1 shows an example of a disaster prevention device in which the above-mentioned indicator light is provided, and is a front view showing the front side of a tunnel fire hydrant box in which the indicator light is provided. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] An embodiment of the indicator light of the present invention will be described below with reference to Figures 1 to 6. The indicator light of the present invention can be used as an indicator light for indicating the location of various disaster prevention facilities such as emergency alarm facilities, automatic fire alarm facilities, and fire hydrant facilities.

[0014] Here, the terms "front," "rear," "back," and other terms indicating position and direction used to describe the indicator light of this invention are used according to the position and direction of the indicator light when it is installed.

[0015] [Basic configuration] 5, the indicator light 1 comprises a light-emitting display unit 2 and a main body 3 to the front of which the light-emitting display unit 2 is attached. It is attached to various disaster prevention devices and the like, and is provided so that the light-emitting display unit 2 always emits light, for example in red, using a light-emitting element (not shown) such as an LED element provided inside the main body 3 as a light source to indicate its position.

[0016] [Light-emitting display section] ·Transparent part 1 to 4, the light-emitting display unit 2 has a light-transmitting portion 2a having a circular shape when viewed from the front. In the light-transmitting portion 2a, a front portion 2aa facing forward functions as an emission surface for light from the light-emitting element, and a back portion 2ab facing backward (toward the main body 3) functions as an incidence surface for light from the light-emitting element. That is, in the example shown in the figures, the light-emitting display unit 2 has the light-transmitting portion 2a having a circular shape when viewed from the front, which emits red light using the light-emitting element inside the main body 3 as a light source.

[0017] As will be described in detail later, the light-transmitting portion 2a functions as a concave lens having a front portion 2aa on the light-emitting side which is concave, and a back portion 2ab on the light-incident side which has annular undulating portions 2aba arranged concentrically.

[0018] In the illustrated example, the light-emitting display unit 2 is provided with a flange 2b and a peripheral wall 2c on the outer periphery of the light-transmitting portion 2a. The flange 2b comes into contact with the back surface of the mounting surface when the indicator lamp 1 is mounted, and functions to make the outer periphery of the light-emitting display unit 2 flush with the mounting surface, and the peripheral wall 2c functions as a screw-fitting portion with the main body 3. When the front panel 4 is mounted on the light-emitting display unit 2, the flange 2b is covered by the front panel 4, and only the light-transmitting portion 2a is exposed to the outside. In the illustrated example, since only the portion of the light-transmitting portion 2a exposed to the outside needs to be translucent, only that portion may be made of a translucent material (such as a transparent synthetic resin), or the entire unit including the flange 2b and the peripheral wall 2c may be made of a translucent material.

[0019] ·Front part (output surface) In the light-emitting display unit 2, a front surface 2aa of the light-transmitting portion 2a, which is an emission surface of the light-emitting element, is formed as a concave surface that does not protrude forward. More specifically, the front surface 2aa is formed as a rotationally symmetric concave curved surface about the central axis of the light-transmitting portion 2a.

[0020] ·Back side (incident surface) The light-emitting display unit 2 is formed such that a back surface 2ab of the light-transmitting portion 2a, which is the light-entering surface of the light-emitting element, is a convex surface that protrudes rearward and has annular undulating portions 2aba arranged concentrically.

[0021] Benefit from a concave front surface and undulating back surface In the indicator lamp 1, by forming the front portion 2aa of the light-transmitting portion 2a as a concave surface, the light-emitting display portion 2 can be made thin and the light can be diffused and emitted from the front portion 2aa. Also, by forming the back portion 2ab of the light-transmitting portion 2a as an annular, concentrically arranged undulating portion 2aba, the light incident from the back portion 2ab can be refracted toward the outer periphery of the light-transmitting portion 2a, and the amount of light diffused and emitted from the front portion 2aa can be increased. In other words, according to the indicator lamp 1, the light-emitting display portion 2 can be made thin and visibility from the side can be improved.

[0022] -Examples of the back surface shape Convex back surface More specifically, in the illustrated example, the back surface portion 2ab is a convex surface that follows a convex curved surface having the same curvature as the concave curved surface of the front surface portion 2aa around the central axis of the light-transmitting portion 2a and has the undulating portion 2aba on its surface. This allows the plate thickness of the light-transmitting portion 2a to be approximately uniform.

[0023] ...Step-like shape of the undulating area The undulating portion 2aba in the back surface 2ab of the light-transmitting portion 2a may have various shapes, such as a plurality of annular steps, concaves, or convexities (including combinations thereof), as long as it can refract the light of the light-emitting element incident thereon toward the outer periphery of the light-transmitting portion 2a. However, in the illustrated example, as shown in FIG. 4, it is made up of a plurality of annular steps, and coupled with the back surface 2ab being a convex surface, the flat surface portion is made to have a shape in which the flat surface portion continues in a step-like manner in the radial direction via the step portions. By making it to have such a step-like shape, even if the back surface 2ab is made convex and the plate thickness of the light-transmitting portion 2a is made approximately uniform, more of the light of the light-emitting element incident from the back surface 2ab can be refracted toward the outer periphery of the light-transmitting portion 2a, and the light that is diffused and emitted from the front surface 2aa can be increased. That is, the visibility from the side can be improved.

[0024] Changing column width In the illustrated example, as shown in Figs. 2 and 4, the row width between each step is made shorter from the center side toward the outer periphery side. This is for the purpose of preventing an excessive difference in brightness of the entire light-transmitting portion 2a even if the back surface portion 2ab is made convex and the plate thickness of the light-transmitting portion 2a is made substantially uniform. However, in order to increase the light diffused to the sides, the row width between each step may be made longer from the center side toward the outer periphery side. By doing so, more of the light from the light-emitting element incident from the back surface portion 2ab can be refracted toward the outer periphery side of the light-transmitting portion 2a, and the light diffused and emitted from the front surface portion 2aa can be increased. That is, the visibility from the side can be improved. That is, the visibility from the side can be improved.

[0025] ·Central concave part Furthermore, in the illustrated example, as shown in Fig. 4, a small concave portion 2abb is provided in the center of the back surface portion 2ab, which is generally formed as a convex surface. More specifically, the central concave portion 2abb is formed as a rotationally symmetric concave curved surface about the central axis of the light-transmitting portion 2a. This allows the front and back of the portion where the central concave portion 2aba is located to be concave, improving the diffusion effect of light that passes through that portion and is emitted.

[0026] [Light emitting element placement] Although the arrangement of the light-emitting elements serving as the light source for the light-emitting display unit 2 is not shown, for example, when LED elements are used as the light-emitting elements, it is conceivable that a circular LED board of approximately the same size as the light-transmitting unit 2 is provided inside the main body 3 in a concentric arrangement inside the light-transmitting unit 2, and a plurality of LED elements are provided on the board in an overall uniform arrangement. In this way, the light-transmitting unit 2a of the light-emitting display unit 2 can be made to emit light as a whole, and while the overall visibility can be improved, the visibility from the side can also be improved as described above.

[0027] Also, although not shown in the drawings, instead of arranging the LED elements on the board evenly, it is possible to arrange them unevenly on the left and right sides, or to arrange the light-emitting surface of each LED element to face diagonally to the left and right sides in the forward direction. By doing so, the light-transmitting portion 2a of the light-emitting display portion 2 can emit light particularly brightly toward the left and right sides, improving visibility from the side.

[0028] [Specific examples of indicator lamp installation targets] 6 shows a fire hydrant box 10 of a fire hydrant facility for a tunnel. The indicator light 1 can be used as an indicator light for such a fire hydrant box 10.

[0029] The fire hydrant box 10 has a built-in fire hose and is installed beside a roadway (on an inspection road, etc.) with its front side facing the roadway. The indicator light 1 is attached to the front of the housing of the fire hydrant box 10 with the light-transmitting part 2a of the light-emitting indicator 2 exposed to the outside.

[0030] In such a tunnel fire hydrant box 10, the indicator light 1 can be made thin and the visibility from the side can be improved, which is particularly advantageous in view of the need to make the device thin and the need to improve the visibility from the side because the indicator light 1 is often viewed from an oblique direction or from the side. This is also true when the indicator light 1 is provided on a tunnel fire extinguisher box.

[0031] [Example of changing the configuration] Although an embodiment of the present invention has been described above with reference to FIGS. 1 to 6, the specific configuration is not limited to the above embodiment, and also includes designs that do not deviate from the gist of the present invention.

[0032] For example, the back surface 2ab of the light-transmitting portion 2a may be flat or concave instead of convex. However, a convex surface is advantageous in that it allows the plate thickness to be thin, prevents a decrease in the amount of light, and makes molding easier. Even if the back surface 2ab is convex, it is possible to diffuse light more as described above if the flat surface has an undulating portion 2aba in a stepped shape. [Explanation of symbols]

[0033] 1: Indicator light 2: Light-emitting display section 2a: Transparent section 2aa: Front section (concave) 2ab: Back side (convex) 2aba: Undulating area (step-like) 2abb: Central concave part 2b: Flange part 2c: Peripheral wall part 2d: Peripheral wall part 3: Main body 4: Front panel 10: Fire hydrant box (for tunnels)

Claims

1. An indicator lamp having a light-emitting display unit that emits light using a light-emitting element as a light source, the light-emitting display unit has a front surface, which is an emission surface of the light-emitting element, formed as a concave surface, and a back surface, which is an incidence surface of the light from the light-emitting element, formed as a convex surface, and is formed to have a plurality of rows of undulating portions arranged in a ring-shaped, concentric manner; The indicator light is characterized in that the width of each of the plurality of rows of undulating portions decreases from the center side to the outer periphery side of the light-emitting indicator portion.

2. An indicator lamp having a light-emitting display unit that emits light using a light-emitting element as a light source, the light-emitting display unit has a front surface, which is an emission surface of the light-emitting element, formed as a concave surface, and a back surface, which is an incidence surface of the light from the light-emitting element, formed as a convex surface, and is formed to have a plurality of rows of undulating portions arranged in a ring-shaped, concentric manner; The indicator light is characterized in that the width of each of the plurality of rows of undulating portions increases from the center of the light-emitting indicator toward the outer periphery.

3. 3. The indicator lamp according to claim 1, wherein each of the rows of undulating portions has a shape that refracts incident light toward an outer periphery.

4. 4. The indicator light according to claim 1, wherein each of the rows of undulating portions is formed by an annular step, recess, or protrusion.

5. 5. The indicator lamp according to claim 1, wherein the plurality of rows of undulating portions are continuous in a stepped manner in the radial direction.

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