JPH04314089A - Guiding lamp - Google Patents

Abstract

PURPOSE:To increase the quantity of light to feet as compared with a convensional method without enhancing the brightness of a light source. CONSTITUTION:A housing 1 is provided with a light transmitting window 8 for transmitting light flux from the light source on its lower face. A display plate is provided on a position between the light source 4 and the window 8 in the front of the housing 1. A reflection face 10 is formed on the inner periphery of the housing 1 so as to be opposed to the display plate. A diffusing reflection area 10a for executing diffusing reflection is formed on the center part of a reflection face 10 in the direction connecting the light source 4 and the window 8 and positive reflection areas 10b for executing positive reflection are provided on both end parts of the reflection face 10. Mixed reflection areas 10c for mixing positive reflection and diffusing reflection are provided between the area 10a and the area 10b.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide light that provides guidance to emergency exits by transmitting light through a display pattern formed on a display board.

0002

2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, a light source 4 such as a straight-tube fluorescent lamp is built into a housing 1, and a display board is provided with a luminous flux from the light source 4 disposed on the front surface of the housing 1. 6 is provided. A display pattern 7 is formed on the display board 6 to guide the user to an emergency exit or the like. A light transmitting window 8 is formed in the housing 1 to face the light source 4 and allow the light beam from the light source 4 to pass through downward in order to illuminate the feet. Therefore, the display panel 6 and the transparent window 8 are formed on surfaces of the housing 1 that are orthogonal to each other.

By the way, the display board 6 has a light source 4 and a transparent window 8.
Therefore, in order to irradiate the display panel 6 with the luminous flux from the light source 4, the inner peripheral surface of the housing 1 and the surface facing the display panel 6 serves as a reflective surface 10. ing. In addition, in order to irradiate the display board 6 with a substantially uniform amount of light, the reflective surface 10 has diffused reflection at the center facing the display board 6 in the direction connecting the light source 4 and the transparent window 5. A specular reflection area 10a for specular reflection is formed at the end near the light source 4, and specular reflection and diffuse reflection are mixed between the diffuse reflection area 10a and the specular reflection area 10b. A mixed reflection region 10c is formed.

0004

[Problems to be Solved by the Invention] In the above configuration, in order to increase the amount of light irradiated onto the display panel 6, the reflective surface 1 is
Since the area of the diffuse reflection region 10a at 0 is made large, there is a problem that the amount of light that passes through the light-transmitting window 5 is very small, and the illuminance at the feet is low. To solve this problem, it is possible to increase the brightness of the light source 4, but this increases power consumption, which may limit the lighting time during a power outage, or increase the capacity of the battery that serves as a power source during a power outage. This is necessary and inconvenient.

[0005] The present invention aims to solve the above-mentioned problems, and aims to provide a guide light in which the amount of light that passes through the transparent window is increased compared to the conventional one without increasing the brightness of the light source. be.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a housing that houses a light source and has a transparent window formed on one side that transmits the luminous flux from the light source downward;
A display plate is arranged on one side of the housing between the light source and the light-transmitting window and is substantially perpendicular to the light-transmitting window, and has a display pattern through which the light beam from the light source passes; In a guide light equipped with a reflective surface formed on one side facing the board, the reflective surface includes a diffuse reflection area that performs diffuse reflection in the central part facing the display board in the direction connecting the light source and the transparent window. is formed, and a specular reflection area that performs specular reflection is formed at both ends, and a mixed reflection area that mixes specular reflection and diffuse reflection is formed between the diffuse reflection area and the specular reflection area. .

[0007]

[Operation] According to the above configuration, a mixed reflection area and a specular reflection area are formed on the reflective surface in the vicinity of the transparent window, so in the conventional configuration, only diffuse reflected light is generated in the vicinity of the transparent window. In contrast, in the present invention, specularly reflected light is generated, and the amount of light that passes through the light-transmitting window is significantly increased compared to the conventional method. As a result, the illuminance at the feet can be increased. In addition, in the conventional configuration, the diffusely reflected light near the translucent window had almost no effect on the amount of light transmitted through the display panel, so the diffusely reflected area near the translucent window was divided into the mixed reflection area and the specular reflection area. Even if it is replaced with , there is almost no effect on the amount of light transmitted through the display panel.

[0008]

【Example】

(Embodiment 1) As shown in FIG. 1, a housing 1 is composed of a device body 2 that is attached to a construction surface such as a ceiling surface, and a body frame 3 that is detachably connected to the device body 2. Ru. A light source 4 made of a straight tube fluorescent lamp is housed in the upper part of the housing 1, and a display window 5 is provided on one side of the body frame 3, which is in the lower part of the housing 1 and parallel to the longitudinal direction of the light source 4, as shown in FIG. The display panel 6 is opened and is attached to cover the display window 5. The display board 6 has a display pattern 7 (see FIG. 4) that allows part of the light beam from the light source 4 to pass through and guides the user to an emergency exit or the like.
is formed. A light-transmitting window 8 for transmitting light from the light source 4 is opened on the lower surface of the housing 1, and a light-transmitting plate 9 is attached to cover the light-transmitting window 8. The light from the light source 4 that has passed through the transparent window 8 illuminates the feet below the housing 1. The inner circumferential surface of the appliance body 1 facing the display panel 6 is a reflective surface 10, and by reflecting the light from the light source 4 on the reflective surface 10, a large amount of light can be transmitted through the display panel 6 and the transparent window 8. It's like this.

The reflective surface 10 has a diffuse reflection area 10a that performs diffuse reflection in the center facing the display panel 6 in the direction connecting the light source 4 and the transparent window 5, and has a diffuse reflection area 10a that performs regular reflection at both ends. It has a reflective area 10b. Furthermore, a mixed reflection area 10c in which diffuse reflection and regular reflection are mixed is formed between the diffuse reflection area 10a and the specular reflection area 10b. For example, as shown in FIG. 1, the mixed reflection region 10c can be formed by alternately arranging diffuse reflection surfaces (hatched portions) and specular reflection surfaces in a striped pattern. Other methods include forming the boundary line between the diffuse reflection surface and the specular reflection surface in a sawtooth shape, arranging the diffuse reflection surface and the specular reflection surface in a grid pattern, or forming the diffuse reflection surface in the form of dots to create rough dots. The mixed reflection region 10c may be formed by changing the thickness. Further, in this embodiment, the ratio of the diffuse reflection surface and the specular reflection surface in the mixed reflection area 10c is kept constant, but the ratio of the specular reflection surface is gradually increased from the diffuse reflection area 10a to the specular reflection area 10b. , the ratio of the diffuse reflection surface to the specular reflection surface may be changed depending on the location. Here, the diffuse reflection surface may be formed by silk printing or by pasting a white sheet or white resin.

Incidentally, in the upper space inside the housing 1, a pair of lamp holders 11 holding the light source 4 are attached to the instrument body 1. Furthermore, above the light source 4, there is a ballast 12 that constitutes a lighting circuit for the light source 4, a battery holder 13 that stores a battery that is normally charged and serves as a power source in the event of a power outage, a power outage detection circuit that detects a power outage, and a battery that serves as a power source. A lighting device 14 including a lighting circuit for lighting the light source 4 and the like is attached to the appliance body 1. Also,
A reflecting plate 15 is attached to the light source 4 over the entire length in the longitudinal direction. The reflecting plate 15 has a substantially U-shaped cross section;
The light source 4 is placed inside the shape, and the light source 4 is fitted into the shape. Therefore, the reflecting plate 15 reflects the light beam from the light source 4 downward.

(Embodiment 2) In Embodiment 1, the diffuse reflection region 10a, specular reflection region 10b, and mixed reflection region 10c are formed on the same plane, but in this embodiment, as shown in FIG. A diffuse reflection plate 16 is fixed to the inner peripheral surface of the instrument main body 2, which is a specular reflection surface. The diffuse reflection plate 16 is a milky-white translucent body, and is formed in such a shape that the thickness at both upper and lower ends is smaller than the thickness at the center. Therefore, in the thin portion, the amount of diffusely reflected light is less than that in the thick portion, and is mixed with the specularly reflected light on the inner circumferential surface of the instrument body 2.

The other configurations and functions are the same as those in the first embodiment, so their explanations will be omitted.

[0013]

Effects of the Invention As described above, the present invention forms a mixed reflection area and a specular reflection area on the reflective surface in the vicinity of the transparent window. In contrast to only diffusely reflected light, the configuration of the present invention generates specularly reflected light, and the amount of light that passes through the light-transmitting window is significantly increased compared to the conventional case. As a result, there is an advantage that the illuminance at the feet can be increased without increasing the brightness of the light source.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment with a main body frame removed.

FIG. 2 is a cross-sectional view showing Example 1.

FIG. 3 is a sectional view showing Example 2.

FIG. 4 is a perspective view showing a guide light according to the present invention.

FIG. 5 is a perspective view of a conventional example with the main body frame removed.

[Explanation of symbols]

1 Housing 2. Equipment body 3 Main frame 4 Light source 6 Display board 7 Display pattern 8 Translucent window 10 Reflector 10a Diffuse reflection area 10b Specular reflection area 10c Mixed reflection area

Claims (1)

[Claims] 1. A housing containing a light source and having a transparent window formed on one side that transmits the luminous flux from the light source downward;
A display plate is arranged on one side of the housing between the light source and the light-transmitting window and is substantially perpendicular to the light-transmitting window, and has a display pattern through which the light beam from the light source passes; In a guide light equipped with a reflective surface formed on one side facing the board, the reflective surface includes a diffuse reflection area that performs diffuse reflection in the central part facing the display board in the direction connecting the light source and the transparent window. is formed, specular reflection areas that perform specular reflection are formed at both ends, and a mixed reflection area that mixes specular reflection and diffuse reflection is formed between the diffuse reflection area and the specular reflection area. Features a guiding light.