JP2012018759A - Floor-buried type guide light device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to irradiate a uniform volume of light on a whole translucent member arranged on an upper surface side of a light guide plate.SOLUTION: A light guide plate holding part 31 and a pair of light source unit holding parts 32, 33 are formed on a holder 3 arranged below a translucent member 2. The light source unit holding parts 32, 33 are formed in a rotationally symmetrical shape to pinch right and left sides of the light guide plate holding part 31. A pair of light source units 5 housed in each of the light source unit holding parts 32, 33 are arranged at rotationally symmetrical positions mutually by pinching the light guide plate housed in the light guide plate holding part 31. Even if light in a condition having a peak of the light volumes at a position biased to one side in a longitudinal direction is irradiated from each of the pair of light source units 5, 5, the volume of incident light is complemented at each position in a longitudinal direction on end surfaces 4A, 4B inside the light guide plate, and nearly a uniform volume of incident light is secured on a whole surface of the light guide plate 4.

Description

  The present invention relates to a guide light device that displays the location of an evacuation exit, and more particularly, to a floor surface embedded type guide light device embedded in a floor surface.

  As a guide light device that is installed in a facility and displays the location of an evacuation exit, there is a floor surface embedded type guide light device that is embedded in the floor surface. The floor-buried guide light device includes a light source that illuminates the translucent member from below by disposing a translucent member on which information indicating the location of the evacuation exit is written substantially flush with the floor surface.

  In recent years, LEDs that have longer life and consume less power than cold cathode tubes have been used as light sources for guide lamp devices. The use of LEDs as the light source is also conceivable for the floor-buried guide light device (see, for example, Patent Document 1).

  In the guide light device, in order to make it easy to visually recognize the information written on the translucent member, light should be emitted from the light source so that the entire surface of the translucent member has uniform illuminance. However, since the light emitting portion of the LED is sufficiently small compared to the display surface of the translucent member, when the LED is used as the light source of the guide light device, an LED light source image is generated on the entire surface of the translucent member. It is necessary not to. For this reason, it is possible to apply the technique currently used for the general LED surface light-emitting device to the floor-buried type guide light apparatus which uses LED as a light source.

  As a conventional LED surface light emitting device applicable to a floor-buried guide light device using an LED as a light source, a rectangular light guide plate having a light diffuser for diffusing light incident from an end surface inside or on the back surface, and a light plate And a plurality of LEDs facing one end face of the LED (see, for example, Patent Documents 2 to 4).

JP 2004-111104 A Japanese Patent No. 3267119 Japanese Patent No. 4221816 Japanese Patent No. 4411732

  However, in the conventional LED surface light emitting device that can be applied to the floor-buried guide light device, the LEDs are arranged to face the end surface of the light guide plate, and thus it is necessary to provide a plurality of LEDs along the longitudinal direction of the end surface. is there. Further, light is incident on the light guide plate only from one end face (incident end face) of the light guide plate, and the light quantity on the other end face side parallel to the incident end face is smaller than the light quantity on the incident end face side. For this reason, in order to ensure a uniform amount of light over the entire surface of the light guide plate, it is necessary to adjust the amount of the light diffuser in the light guide plate and the amount of the reflector disposed on the back surface of the light guide plate in the direction orthogonal to the incident end surface. Occurs.

  An object of the present invention is to arrange a pair of light source units that irradiate light whose peak positions of light amount are biased on each of first and second end faces parallel to each other of a light guide plate so as to be rotationally symmetrical with each other. Thus, it is an object of the present invention to provide a floor-buried guide light device that can irradiate light of a uniform amount of light on the entire translucent member disposed on the upper surface side of the light guide plate.

  In order to solve the above-described problems, a floor-buried guide light device according to the present invention includes a translucent member, a light guide plate, a pair of light source units, and a holder. Information indicating the location of the evacuation exit is written on the translucent member, and the upper surface is flush with the floor surface. The light guide plate emits light incident from the first and second end faces parallel to each other from the upper surface. Each of the pair of light source units is disposed at a position where the light intensity peak is biased toward one end in the longitudinal direction of the first and second end faces. The holder has a light guide plate holding part and a pair of light source unit holding parts. The light guide plate holding part holds the light guide plate below the light transmissive member so that the upper surface of the light guide plate faces the bottom surface of the light transmissive member. The pair of light source unit holding portions holds the pair of light source units in positions that are rotationally symmetric with respect to each other with the light guide plate interposed therebetween in a state where each of the pair of light source units is opposed to the first and second ends.

  According to this configuration, light incident on each of the first and second end surfaces of the light guide plate from each of the pair of light source units is emitted from the upper surface of the light guide plate, and the translucent member is moved from the bottom surface side to the upper surface side. The information written on the translucent member is visually recognized from above the floor surface. The light emitted from the pair of optical units is biased toward one end in the longitudinal direction of the first and second end faces, and the light intensity peak is located. Since the pair of optical units are disposed at positions that are rotationally symmetrical with each other with the light guide plate sandwiched between the first and second end surfaces of the light guide plate, the first end surface and the second end surface are opposite in the longitudinal direction. The peak of the light amount is located at the position, and light with a uniform light amount is incident on the light guide plate over the entire surface.

  In this configuration, it is preferable that the light source unit is composed of a housing, a reflecting plate, and an LED substrate. The housing has an opening that is shorter than each of the first and second end faces, and accommodates the reflector and the LED substrate therein. The reflecting plate has a reflecting surface that is convex on the opposite side of the opening along the longitudinal direction of the housing. The LED substrate has an LED that irradiates light on the reflection surface along the longitudinal direction of the casing from one end side of the reflecting plate in the longitudinal direction of the casing, and terminals that are electrically connected to the LEDs in the longitudinal direction of the casing. It is mounted on the orthogonal surface, and the terminal portion on which the terminal is mounted is exposed to the outside of the housing.

  Accordingly, a uniform amount of light can be incident on the entire surface of the light guide plate from each of the pair of light source units each having a single LED.

  In addition, the holder includes a pair of terminal storage portions that store a terminal portion at one end of each of the pair of light source unit holding portions, and a pair of terminal portion storage portions that are open at the bottom. It is preferable.

  As a result, the terminal portion of the LED substrate can be exposed on the bottom surface side of the holder, and the power supply line from the power supply portion arranged below the light guide plate to the LED is not exposed to the outside of the holder, and the device is embedded. Space can be reduced.

  According to this invention, the light of a uniform light quantity can be irradiated to the whole translucent member arrange | positioned at the upper surface side of the light-guide plate.

It is a top view of the floor surface embedded type | mold guide light apparatus which concerns on embodiment of this invention. It is sectional drawing of the floor surface embedded type | mold guide lamp apparatus. It is a top view which shows the internal structure of the floor surface embedded type | mold guide light apparatus. It is an assembly drawing of the principal part of the floor surface embedded type guide light device. It is a bottom view of the holder of the floor surface embedded type guide light device. (A) And (B) is a figure explaining the operation | work at the time of attachment and removal of the light source unit with respect to a holder. It is a figure which shows the light quantity of the light which injected into the light-guide plate of the floor surface embedded type | mold guide light apparatus.

  Hereinafter, a floor-buried guide light device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the floor-buried guide light device 10 is buried in the floor 100 of the facility and displays the location of the evacuation exit. For this reason, the floor-buried guide light device 10 includes a case 1, a translucent member 2, a holder 3, a light guide plate 4, a light source unit 5, a chassis 6, a power supply circuit 7, and a frame body 8.

  The case 1 is a case having a flat rectangular parallelepiped shape with an open upper surface, and is formed by pressing a metal flat plate as an example. The case 1 accommodates a translucent member 2, a holder 3, a light guide plate 4, a light source unit 5, a chassis 6, and a power supply circuit 7, and a frame body 8 is fixed to the peripheral portion of the opening on the upper surface.

  The translucent member 2 includes, for example, a rectangular tempered glass 2A and a display plate 2B. The display board 2B is made of a translucent resin as an example, and figures 21 and 22 are written with light-shielding paint as information indicating the location of the evacuation exit on the front or back surface. The tempered glass 2 </ b> A is disposed in the opening of the case 1 so that the upper surface is flush with the floor surface 100 in a state where the edge is pressed downward by the frame body 8 with the elastic packing 9 interposed therebetween.

  In addition, you may abbreviate | omit the display board 2B by writing the figures 21 and 22 with the light-shielding coating material on the lower surface of 2 A of tempered glass. Moreover, the translucent member 2 can use materials other than tempered glass on condition that it has translucency and has sufficient intensity | strength.

  The holder 3 holds the light guide plate 4 and the pair of light source units 5 at a position above the chassis 6 below the translucent member 2 inside the case 1.

  The light guide plate 4 is a rectangular plate-like body in which a light diffuser is uniformly dispersed in a transparent resin material. The light guide plate 4 diffuses the light incident from the end surface by the light diffuser and emits the light to the upper surface side. The display plate 2 </ b> B is disposed in close contact with the upper surface of the light guide plate 4.

  As an example, the light source unit 5 stores a reflecting plate composed of a single LED and a curved surface in a long housing made of resin, and the light of the LED reflected by the reflecting plate is opened on the housing. Irradiate from the outside.

  The chassis 6 is formed by pressing a metal flat plate as an example, and is mounted on the inner bottom surface of the case 1 with electrical components such as a power supply circuit 7 mounted thereon.

  The power circuit 7 supplies power to the LEDs of the light source unit 5. The power supply circuit 7 may receive the on / off of the power supply and the adjustment of the supplied power amount from the outside via infrared light or radio waves.

  The frame body 8 is screwed to the flange portion of the case 1. By fixing the frame 8 to the case 1 so as to be positioned above the edge of the translucent member 2, the bottom surface of the holder 3 comes into contact with the upper end of the chassis 8 in the case 1, and the upper end of the holder 3 is The bottom surface of the translucent member 2 contacts. The vertical positions of the holder 3 and the translucent member 2 in the case 1 are fixed.

  As shown in FIGS. 4 to 6, the holder 3 is formed in a rectangular flat housing shape with an open upper surface by resin molding using white resin as an example. The holder 3 includes a light guide plate holding portion 31 that holds the light guide plate 4, and light source unit holding portions 32 and 33 that hold the light source unit 5 on the left and right sides of the light guide plate holding portion 31. The light source unit holding portions 32 and 33 are formed in a shape that is rotationally symmetric with respect to the light guide plate holding portion 31 on both sides of the light guide plate holding portion 31.

  When the light guide plate 4 and the pair of light source units 5, 5 are housed in the light guide plate holding part 31 and the light source unit holding parts 32, 32 of the holder 3, each of the first end face 4 </ b> A and the second end face 4 </ b> B of the light guide plate 4 is provided. The openings 51 of the pair of light source units 5 and 5 are close to each other and face each other. The pair of light source units 5 and 5 are arranged in a state of rotational symmetry with respect to the light guide plate 4.

  At four corners of the light guide plate holding portion 31, wedge-shaped protrusions 311 protrude from the inner surface of the extension piece 312. The extension piece 312 is elastically deformed outward by the contact between the light guide plate 4 and the protrusion 311 when the light guide plate 4 is accommodated in the light guide plate holding portion 31 from above. When the lower surface of the light guide plate 4 comes into contact with the bottom surface of the light guide plate maintaining portion 31, the extension piece 312 returns to the original position so that the protrusion 311 is fitted into the recess 411 formed on the upper surface of the light guide plate 4. .

  Each of the light source unit holding portions 32 and 33 is formed with a wedge-shaped protrusion 321 at one location on the first end side in the longitudinal direction, and wedge-shaped at two locations on the second end portion side. The protrusion 322 is formed. The protrusion 321 protrudes from the wall surface of the holder 3. The protrusion 322 protrudes from the inner surface of the extension piece 323.

  As shown in FIG. 5, terminal storage portions 34 and 35 are formed on the second end side of the light source unit holding portions 32 and 33. The terminal accommodating portions 34 and 35 are open at the bottom surface to the bottom surface side of the holder 3. At the second end 5B of the light source unit 5, the terminal portion 53A of the substrate 53 is exposed downward. The terminal accommodating portions 34 and 35 accommodate the terminal portions 53A of the light source units 5 and 5 accommodated in the light source unit holding portions 32 and 33, respectively. A socket (not shown) in the terminal storage portions 34 and 35 is attached to the terminal portion 53A. This socket is connected to the power supply circuit 7 via a power supply line.

  As shown in FIG. 6A, when the light source unit 5 is stored in the light source unit holding portion 32, the first end portion 5A of the light source unit 5 is inserted below the protrusion 321 and then the light source unit 5 The second end 5B is brought into contact with the upper surface of the protrusion 322 and pushed downward. At this time, the extended piece 323 is elastically deformed outward. The extension piece 323 is original so that the lower surface of the protrusion 322 contacts the upper surface of the second end portion 5B of the light source unit 5 when the lower surface of the light source unit 4 contacts the bottom surface of the light source unit holding unit 32. Return to position. The same operation is performed when the light source unit 5 is stored in the light source unit holding part 33.

  When the light source unit 5 is removed from the holder 3 at the time of replacement of the light source unit 5, as shown in FIG. 6B, the light source unit holding part 32 can be removed from the recess 324 formed on the side surface of the light source unit holding part 32. A tool such as a driver 200 is inserted between the bottom surface and the lower surface of the light source unit 5. When the extending piece 322 is elastically deformed outward by the contact between the upper surface of the light source unit 5 and the protrusion 322 and the contact between the upper surface of the light source unit 5 and the protrusion 322 is released, the light source unit 5 is removed from the light source unit holding part 32. break away. The same operation is performed when removing the light source unit 5 from the light source unit holding part 33.

  As shown in FIG. 7, an LED 52 and a reflection plate 54 are housed in the housing 51 of the light source unit 5. The LED 52 is mounted on the substrate 53 on the second end 5 </ b> B side, and is connected to a terminal mounted on the terminal portion 53 </ b> A of the substrate 53. The reflection plate 54 includes a reflection surface that is curved in a convex shape on the side away from the opening 5 </ b> C along the longitudinal direction of the housing 51.

  The mounting surface of the substrate 53 is arranged in a direction orthogonal to the longitudinal direction of the housing 51. The LED 52 irradiates light in the longitudinal direction of the housing 51. The light emitted from the LED 52 is reflected by the reflection surface of the reflection plate 54 and then enters the light guide plate 4 from the opening 5C via the first end surface 4A and the second end surface 4B of the light guide plate 4.

  The light source unit 5 emits light emitted from a single LED 52 disposed on the second end portion 5B side in the longitudinal direction along the longitudinal direction. The amount of light emitted from the opening 5C is not uniform in the longitudinal direction, and a peak is located on the second end 5B side close to the arrangement position of the LED 52.

  Therefore, by arranging the pair of light source units 5 at positions that are rotationally symmetric with respect to the light guide plate 4, the amount of light incident on the light guide plate 4 from the pair of light source units 5 and 5 is changed between the end faces 4A and 4B. Complement each other in the longitudinal direction. A substantially uniform amount of incident light can be secured over the entire surface of the light guide plate 4, and a substantially uniform amount of light can be irradiated from the upper surface of the light guide plate 4 to the entire surface of the translucent member 2.

  When the light incident on the light guide plate 4 from each of the end surfaces 4A and 4B has a peak in light amount at the center in the longitudinal direction of the end surfaces 4A and 4B, the center in the longitudinal direction of the end surfaces 4A and 4B in the light guide plate 4 Is larger than the light intensity at both ends. In addition, when each of the pair of light source units 5 and 5 is disposed so as to be symmetrical with respect to each other with the light guide plate 4 interposed therebetween, the light quantity on one end side in the longitudinal direction of the end surfaces 4A and 4B in the light guide plate 4 Becomes larger than the amount of light on the other end side.

  Like the floor-buried guide light device 10, the light source unit 5 that irradiates light having a light intensity peak on one end side in the longitudinal direction of the end faces 4 A and 4 B is rotationally symmetric with the light guide plate 4 interposed therebetween. By disposing the light, a uniform amount of light can be incident on the entire surface of the light guide plate 4.

  Light incident on the inside of the light guide plate 4 is diffused in all directions by the light diffuser in the light guide plate 4. Of the light diffused by the light diffuser in the light guide plate 4, the light directed toward the end surfaces orthogonal to the end surfaces 4 </ b> A and 4 </ b> B and the bottom surface is reflected by the side surfaces and the bottom surface of the white holder 3. As a result, the light incident on the inside of the light guide plate 4 is emitted from the upper surface toward the lower surface of the translucent member 2.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 1 ... Case 2 ... Translucent member 3 ... Holder 4 ... Light guide plate 4A ... 1st end surface 4B ... 2nd end surface 5 ... Light source unit 5A ... 1st end part 5B ... 2nd end part 5C ... Opening part DESCRIPTION OF SYMBOLS 10 ... Floor-embedded guide light apparatus 31 ... Light guide plate holding part 32, 33 ... Light source unit holding part 51 ... Housing 52 ... LED
53 ... Board 53A ... Terminal 54 ... Reflector

Claims (3)

Information indicating the location of the evacuation exit is written, a translucent member arranged with the upper surface flush with the floor surface,
A light guide plate for emitting light incident from the first and second end faces parallel to each other from the upper surface;
Each of which is a pair of light source units that emit light of a single LED toward each of the first and second end faces, each of which is on one end side in the longitudinal direction of the first and second end faces A pair of light source units in which light intensity peaks are arranged at biased positions;
Each of the first light source unit and the light guide plate holding part that holds the light guide plate so that the upper surface of the light guide plate faces the bottom surface of the light transmissive member below the light transmissive member. And a pair of light source unit holding portions that hold the light guide plate at positions that are rotationally symmetric with respect to the second end portion, and a holder,
Floor-buried type guide light device with The light source unit includes a housing, a reflector, and an LED substrate.
The housing has an opening that is shorter than each of the first and second end faces, and houses a reflector and an LED board inside.
The reflecting plate has a reflecting surface shaped to be convex on the opposite side of the opening along the longitudinal direction of the housing,
The LED substrate includes: an LED that irradiates light to the reflecting surface along the longitudinal direction of the casing from one end side of the reflecting plate in the longitudinal direction of the casing; and a terminal that is electrically connected to the LED. The floor-embedded guide lamp device according to claim 1, wherein the floor-embedded guide lamp device is mounted on a surface orthogonal to a longitudinal direction of the housing, and a terminal portion on which the terminal is mounted is exposed to the outside of the housing.   The said holder has a pair of terminal storage part which is a pair of terminal storage part which accommodates the said terminal part in each one end part of said one pair of light source unit holding | maintenance part, and the bottom face was open | released. The floor surface buried type guide light device according to 1 or 2.

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