JP2013218965A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of extracting light with little shading difference without need of adjusting light irradiated from a light source by using a primary lens or the like.SOLUTION: A gatepost lamp 100 as a lighting fixture has an extraction face formed on a face other than a bottom face, a light source member 40 arranged along a length direction at the center of a top face inside a housing portion 10, and two light guide plates 60 arranged so as to have gradually more intervals to a front side and a rear side each, from the light source member 40 toward the bottom face. The gatepost lamp 100 lets light sources 41 emit light as a plug 26 is connected with a power supply means, and the light is incident from an end face 62 of each light guide plate 60 to be extracted mainly from a main face on the front and to be irradiated from the extraction face to the surroundings. Thus, the gatepost lamp 100 functions as a lighting fixture of which the extraction face becomes an irradiating portion.

Description

  The present invention relates to a lighting fixture.

  Conventionally, as a luminaire that irradiates light emitted from a light source in different directions, a light source disposed at a bottom in a direction perpendicular to a lighting target surface of the luminaire and a primary lens installed in a state of covering the light source There is a light-emitting device and a straight lens that slightly refracts light emitted from the light-emitting device in the lateral direction or a slightly bent primary reflecting member provided on the upper portion of the primary lens (Patent Document 1). According to this lighting fixture, the light emitted from the light emitting device can be refracted in the horizontal direction at right angles by the primary reflecting member and can be irradiated in the horizontal direction.

JP 2009-300843 A

  However, when a plurality of LEDs are used as the light source in the above-described lighting fixture, there is a possibility that a shadow difference may occur depending on a portion where the light reflected by the primary reflecting member is reflected. Therefore, there is a problem that a primary lens must be installed in the light emitting device. Further, since there is a distance from the light source to the reflecting member, the light may diffuse and be lost and dark before the light reaches the reflecting member. Therefore, there has been a problem that a primary lens must be installed in the light emitting device to reduce the diffusivity. Further, by suppressing the diffusivity with the primary lens, there is a problem that the light reflected by the primary reflecting member also has a low diffusivity and is likely to be light with high straightness.

  This invention is made in view of such a subject, and it is not necessary to adjust the light irradiated from the light source with a primary lens etc., and provides the lighting fixture which can derive | lead out light with little shadow difference. Main purpose.

  The present invention adopts the following means in order to achieve the main object described above.

The lighting fixture of the present invention is
An accommodating portion having a lead-out surface for leading light to one or more surfaces other than the bottom surface;
A light source provided in the housing portion;
A light guide plate that is formed on at least one main surface and includes a plurality of diffusion dots that diffuse light incident from an end surface from the main surface, and
The light guide plate is disposed in the housing portion so that an end surface thereof faces the light source, and is disposed at an inclination, and light diffused from a main surface is led out from the lead-out surface. .

  The luminaire of the present invention includes a housing portion having a light guide surface, a light source and a light guide plate installed in the housing portion, and the light of the light source incident from the end surface of the light guide plate is transmitted through the light guide plate. Diffused light is diffused by a plurality of diffusion dots formed on the main surface, and the diffused light is led out from the lead-out surface. In the lighting fixture of the present invention, since light is directly incident on the inside from the end face of the light guide plate, it is not necessary to adjust the diffusion of light from the light source with a primary lens or the like, and light diffuses from the light source to a place other than the light guide plate. This can be reduced. In addition, light incident from the light source is diffused in the light guide plate, diffused by a plurality of diffusion dots, and led out of the light guide plate, causing light shadows compared to the case of using a reflective member. Can be reduced. Moreover, the main surface of the light-guide plate used for the lighting fixture of this invention is inclined and arrange | positioned. Therefore, the light diffusion direction can be adjusted by adjusting the orientations of the main surfaces on the front side and the back side, which are the lead-out side. That is, if the front side and the back side of the light guide plate are arranged so that the main surfaces on the front side and the back side face upward, the light can reach farther, while the front side on the light guide plate side. If it arrange | positions so that the main surface of a side and a back side may become downward, the lighting fixture periphery can be illuminated more strongly.

  In the lighting fixture of the present invention, the housing portion is formed in a substantially rectangular parallelepiped shape, and has at least a lead-out surface on both the front surface and the back surface, and the light source is disposed on the inner surface of the upper surface of the housing portion or the lower surface of the housing portion. The light guide plate is composed of two sheets, and is arranged in a substantially V shape so that the distance from the light source gradually increases downward or upward. May be. According to such a luminaire, if a light source is arranged on the end face of the light guide plate, light can be diffused from the entire main surface of the light guide plate, so that two light guide plates arranged at the center between the front and the back If the light source is placed within the range of the end face, light can be led out from the entire main surface to the lead-out surface to illuminate both sides of the housing portion. Thus, the arrangement area of the light source can be narrowed.

  In the lighting fixture of the present invention, the light source may be provided corresponding to each of the two light guide plates. By adopting such a configuration, only the light source of one light guide plate is irradiated with light, and light is led out brightly only on one side of the lead-out surface, or by using light sources of different colors for each light guide plate, The color of light emitted from both sides can be made different.

  In the lighting fixture of the present invention, the light guide plate may be curved. By adopting such a configuration, it is possible to adjust the direction in which light emitted from the lighting fixture is derived. For example, if the front surface of the light guide plate is formed in a concave shape, the light derivation range can be diffused in a converging direction, and if the front surface of the light guide plate is formed in a convex shape, the light derivation range is increased. It can be diffused in the spreading direction. Therefore, the range of light derived from the deriving surface can be set to an arbitrary range.

  In the lighting fixture of the present invention, at least a part of the inner surface of the housing portion may be a reflective surface. By adopting such a configuration, it is possible to reflect the light diffused from the light guide plate to the inside of the housing portion and to irradiate the outside of the housing portion from the lead-out surface. Therefore, it can be set as a brighter lighting fixture compared with the case where it does not have a reflective surface. Note that it is effective to make the reflecting surface white because it is possible to prevent the light guide plate, the light source, and the like from reflecting and reflecting the shape of the light guide plate, the light source, and the like.

FIG. 1 is a partially transparent perspective view showing an outline of a configuration of a gate lamp 100 according to the present embodiment. FIG. 2 is an exploded perspective view of the gate lamp 100 according to the present embodiment. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is an enlarged view of a portion B in FIG. FIG. 5 is a front view showing a partial cross-sectional structure of the gate lamp 100 according to the present embodiment. FIG. 6 is a cross-sectional view showing another embodiment of the gate lamp 100 of the present embodiment. FIG. 7 is a cross-sectional view showing still another embodiment of the gate lamp 100 of the present embodiment. FIG. 8 is a cross-sectional view showing another embodiment of the reflection sheet of the portal lamp 100 according to this embodiment.

  The configuration of the embodiment of the present invention will be described in detail with reference to FIGS. In the present embodiment, description will be given using a gatepost lamp 100 as an example of an embodiment of a lighting fixture. 1 and 2, the diffusing dots 61 illustrated in the light guide plate 60 of FIG. 3 are omitted. The embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations. Moreover, the same or similar code | symbol is attached | subjected to the corresponding component in each figure. In the present specification and claims, for convenience of explanation, the front side, the back side, the top side, the right side, the left side, and the bottom side refer to the directions shown in FIG. The upper surface, the right side surface, the left side surface, and the bottom surface refer to surfaces in the respective directions among the respective component parts.

  As shown in FIGS. 1 and 2, the gatepost lamp 100 mainly includes a housing portion 10, a light source member 40 installed in the housing portion 10, and two light guide plates 60. The accommodating part 10 is provided with the outer frame 11, the transparent box-shaped container 20, and the bottom face member 30, as shown in FIG.

  The outer frame 11 is made of metal, has no bottom surface, and can accommodate the box-shaped container 20 from the bottom surface side. On the other hand, the other front, back, right side, left side, and top surface have a frame of about 1 cm formed on the outer periphery of each surface, and a large opening is formed at the center of each surface. The light guide surface 11a for leading the light diffused by the light guide plate 60 installed to the outside is formed. A central frame 11b is provided on the upper surface at the center between the front surface and the rear surface, which is a position corresponding to the upper portion of the light source member 40, so that the light source member 40, which will be described later, is difficult to visually recognize from the outside. A first fixing hole 11 c is formed below the front surface and the back surface of the outer frame 11.

  The box-shaped container 20 is made of a colorless and transparent plastic, and is formed in a box shape with an open bottom. The box-like container 20 is inserted into the outer frame 11, and the portion disposed on the lead-out surface 11a can lead out light to the outside. The box-shaped container 20 is attached to the lead-out surface 11a formed by the outer frame 11 so as to block the outside and the inside of the accommodating portion 10 and protect structures such as the light source member 40 and the light guide plate 60 inside. It is done. Thereby, the inside can be protected from rain or dust. A second fixing hole 21 is formed below the front surface and the back surface of the box-shaped container 20.

  The bottom surface member 30 forms the bottom surface side of the accommodating portion 10 and is formed in a plate shape having a low standing wall 31 around it. The outer frame 11 and the box-shaped container 20 described above are fixed to the standing wall 31, and together with these, the accommodating portion 10 is formed. The light source member 40, the light source support member 70 that supports the light source member 40, and the light guide plate 60 are mainly attached to the upper surface of the region surrounded by the standing wall 31 of the bottom surface member 30. On the other hand, the lower surface of the bottom member 30 is provided with a power device accommodating portion 32 that can accommodate a power device (not shown) such as a constant voltage device. The standing wall 31 is formed with a screwing hole 33 for fixing the first fixing hole 11 c and the second fixing hole 21 with the screw 90.

  The light source member 40 includes a light source 41 that emits light by power supplied from a power cord 45, a substrate 42 on which a plurality of light sources 41 are disposed, and a C-shaped steel 46 on which these are disposed. As the light source member, a light emitting diode, an organic light emitting diode, a cold cathode tube, a laser oscillator, or the like can be used. The color of the light source is not limited, and may be, for example, white, red, orange, yellow, green, blue, indigo, or purple, or a combination of these colors. In the present embodiment, a white light emitting diode is used as the light source 41.

  The C-shaped steel 46 is made of a long metal having a C-shaped cross section, and the substrate 42 is disposed on the inner bottom surface of the groove 47 of the C-shaped steel 46 so as to face the light source 41 of the substrate 42. Two light guide plates 60 to be described later are arranged so as to be sandwiched in the groove 47. Therefore, the width of the groove 47 of the C-shaped steel 46 is formed to be substantially the same as the thickness of the two light guide plates 60. The C-shaped steel 46 has a function of radiating heat of the light source 41 in addition to a function of fixing the light source member 40 and the light guide plate 60.

  As shown in FIG. 3, the light guide plate 60 is a member that introduces light emitted from the light source 41 from the end surface 62 and emits light mainly from the main surface 63 as indicated by an arrow, for example. As a material of the light guide plate 60, for example, various materials such as a methacrylic resin such as methyl methacrylate and ethyl methacrylate, an acrylic resin such as methyl acrylate and ethyl acrylate, polycarbonate, and polyethylene can be used. The material is not particularly limited as long as the material has high permeability. The light guide plate 60 may be added with a fine particle diffusing agent capable of diffusing light, or a resin plate coated or added with a fluorescent agent that emits fluorescence when irradiated with light may be used. In the present embodiment, the light guide plate 60 has a thickness of 4 mm and uses two curved plates formed of a substantially rectangular parallelepiped plate having transparency. The light guide plate 60 has a plurality of diffusion dots 61 formed on the main surfaces 63 on both sides.

  The diffusing dots 61 are formed by diffusing concave portions, diffusing convex portions, grooves, or the like formed on the main surface 63. The shape and size of the diffusing dots 61 are not particularly limited, and diffusing dots 61 having various shapes can be appropriately employed. The diffusion recess may be a dot having a quadrangular pyramid shape, a conical shape, a quadrangular pyramid shape, or a groove. As a manufacturing method, various processing methods such as ultrasonic processing, heating processing, laser processing, and cutting processing can be employed. The diffusion convex portion may be formed so as to rise (convex) by clean printing, silk printing, or the like. In the present embodiment, the concave portion is recessed in a substantially quadrangular pyramid shape, and a position corresponding to the bottom surface of the quadrangular pyramid is provided on the main surface of the light guide plate 60. Each diagonal line connecting each vertex of the bottom surface of the quadrangular pyramid that forms the diffusion dot 61 is provided so as to be substantially parallel to each side of the light guide plate 60. For this reason, since the light incident from the end face 62 intersects with each side of the diffusing dot 61, the possibility of going straight without diffusing can be reduced, and each side of the bottom surface of the quadrangular pyramid is each side of the light guide plate 60. It becomes easy to diffuse compared with the case where it is substantially parallel. The size of each quadrangular pyramid-shaped diffusion dot 61 may be the same or different. For example, as the distance from the light source 41 increases, each side of the quadrangular pyramid-shaped diffusion dot 61 may be gradually lengthened, or the depth of the quadrangular pyramid-shaped diffusion dot 61 may be gradually increased. By doing so, the amount of light that is bent becomes smaller at a position where the light is close and strong from the light source, and the amount of light that is bent becomes larger as the distance from the light source is increased. . The length of each side of the quadrangular pyramid-shaped diffusion dot 61 may be, for example, 0.6 mm to 1.5 mm. The depth of the quadrangular pyramid-shaped diffusion dots may be 0.4 mm to 0.8 mm, for example. Further, the pitch between adjacent quadrangular pyramid-shaped diffusion dots 61 is not particularly limited, and can be appropriately selected from a pitch of about 1.5 mm to about 8.0 mm, for example. Preferably, the pitch is 1.5 mm to 3.0 mm. In the present embodiment, the length of each side of the diffusion dot 61 is about 0.6 mm and the depth is about 0.4 mm, and the pitch between the adjacent quadrangular pyramid diffusion dots 21 is formed to be 2.0 mm.

  As a method of producing the quadrangular pyramid-shaped diffusion dots 61, processed dots having a shape obtained by inverting the diffusion dots 61 are arranged in a matrix form in each of the vertical and horizontal directions on the light guide plate in a substantially rectangular parallelepiped plate shape before being curved. Formed by ultrasonic machining using an ultrasonic machining horn arranged in That is, by applying ultrasonic vibration to the ultrasonic processing horn and pressing the ultrasonic processing horn perpendicularly to the light guide plate 60, the quadrangular pyramid-shaped diffusion dots 61 having a shape reflecting the shape of the processing dots. Form. After the diffusion dots 61 are formed on the substantially rectangular parallelepiped light guide plate, the light guide plate 60 is obtained by applying heat to the light guide plate and bending it. When light is incident from the end face 62 of the light guide plate 60, the light is diffused by the diffusion dots 61, and the light is mainly guided from the front surface. Note that the size of the diffusing dots 61 in FIG. 4 is drawn larger than the actual size for the sake of drawing.

  The light source support members 70 are formed of a metal plate as shown in FIG. 2, and face each other in the vicinity of both ends of the housing portion 10 via L-shaped attachment members 71 as shown in FIG. A bottom member 30 is attached. By laying the C-shaped steel 46 between the two light source support members 70, the light source member 40 and the light guide plate 60 are attached in the housing portion 10. One of the light source support members 70 is provided with a wiring space portion 72 in which the power cord 45 of the light source member 40 can be put.

  Each component formed in this way is assembled as follows, as shown in FIG. First, after the light source member 40 is installed in the groove 47 of the C-shaped steel 46, the end face 62 of the light guide plate 60 is fitted. At this time, since the light guide plate 60 is curved, the light guide plate 60 is disposed so that the interval gradually increases as the distance from the C-shaped steel 46 increases. While maintaining this state, the light source support member 70 mounted on both sides of the bottom surface member 30 is installed at the center on the upper side. The power cord 45 is connected to the plug 26 that is connected to the power supply source through the power device disposed in the power device housing portion 32 via the wiring space portion 72. As shown in FIG. 3, a white sheet is laid as the reflection sheet 80 on the upper surface of the bottom member 30, and the bottom surface is formed as a reflection surface. Thereby, the light which went to the bottom face can be efficiently reflected, and the light can be led out from the lead-out surface 11a. After the light source member 40 and the light guide plate 60 are attached to the bottom surface member 30 in this way, the screwing hole 33 of the standing wall 31 of the bottom surface member 30, the first fixing hole 11 c of the outer frame 11, and the second fixing of the box-shaped container 20. The service hole 21 is fixed with a screw 90 to form a portal lamp 100.

  As shown in FIG. 1, the gate lamp 100 manufactured in this way has a lead-out surface 11a formed on a surface other than the bottom surface, and a light source member 40 is disposed inside the housing portion 10 along the longitudinal direction of the center of the top surface. The two light guide plates 60 are arranged so that the distance from the light source member 40 toward the bottom surface gradually increases toward the front side and the back side, respectively.

  In the portal lamp 100, the light source 41 emits light by connecting the plug 26 to the power supply means, the light is incident from the end face 62 of the light guide plate 60, and the light is led out mainly from the main face on the front side and from the lead-out face 11a. Irradiate the surroundings with light. Thus, the portal lamp 100 functions as a lighting fixture in which the lead-out surface 11a serves as an irradiation unit.

  According to the gate lamp 100, the light irradiated from one light source member 40 is incident on the two light guide plates 60 at the same time, so that the light passes through the light guide plates 60 and is incident on the main surface 63 of the light guide plate 60. It can be set as the lighting fixture which diffuses light from the main surface by the formed several diffusion dot 61, and guide | induces light from the derivation | leading-out surface 11a. In addition, since light enters from the end face 62 of the light guide plate 60, the light can be widely led out from the main surface 63 simply by arranging the compact light source member 40 having a narrow width on the end faces 62 of the two light guide plates 60. it can. Furthermore, since the light incident from the light source member 40 is diffused in the light guide plate 60 and is also diffused by the plurality of diffusion dots 61, the diffusion rate is high and relatively uniform light can be irradiated to the outside. Furthermore, since the main surface 63 of the light guide plate 60 that guides light is disposed so as to face upward, it is possible to make the light reach farther. Furthermore, since the light guide plate 60 is a curved surface that swells inward, it can irradiate light that does not spread relatively from the lead-out surface 11a. Therefore, it is effective when irradiating light farther. Further, since the reflection sheet 80 is laid on the bottom surface of the storage unit 10, the light diffused from the light guide plate 60 to the bottom surface in the storage unit 10 can be reflected and irradiated outside the storage unit 10.

  The gatepost lamp produced as described above is attached by attaching an arbitrary attachment member to the bottom surface, side surface or top surface, for example, by attaching it to the upper side of the pillar, attaching it to the wall surface, or attaching it to the ceiling, It can be used as a lighting fixture that illuminates the surroundings.

  In addition, this invention is not limited to the structure of the said embodiment, A various change and improvement can be performed, without deviating from the meaning and range of this invention.

  In the above-described embodiment, the lead-out surface 11a is provided in addition to the bottom surface of the housing portion 10. However, the lead-out surface 11a may be provided only on the front surface and the back surface. Further, as shown in FIG. 6, the lead-out surface 11a may be formed only on the front surface, and light may be led out only from the front surface with a single light guide plate. In such a case, it is effective when used as a lighting fixture that can irradiate only in one direction. Moreover, the accommodating part 10 does not necessarily need to be the outer frame 11 and the box-shaped container 20, and only an outer frame may be sufficient as shown in FIG. Further, the accommodating portion 10 may be integrated with the outer frame 11 and the box-shaped container 20.

  Further, in the above-described embodiment, the light source member 40 is disposed at a substantially central position with respect to the front surface and the back surface of the housing unit 10 and on the inner side of the upper surface. As shown in FIG. 7, the light source member 40 is disposed at a substantially central position with respect to the front and rear surfaces of the housing portion 10 and on the inner side of the bottom surface. The distance between the light guide plates 60 may gradually increase upward as the light guide plate 60. In this case, since the light guide plate 60 faces the lower surface, it is effective when the periphery is irradiated.

  In the above-described embodiment, the light source member 40 is configured so that light is incident on the light guide plate 60 with one light source member 40. However, two light source members 40 are provided so as to correspond to the respective light guide plates 60. May be. By adopting such a configuration, only the light source of one light guide plate 60 is irradiated with light, and the light is led out only from one side of the lead-out surface, or the light source provided in each light guide plate is By using the light source members 40 of different colors, the light derived from both sides can be changed to different colors.

  In the embodiment described above, the curved light guide plate 60 is used as the light guide plate 60, but a flat plate-like light guide plate may be used.

  In the above-described embodiment, a white sheet is used as the reflection sheet 80, but is not limited to white, and for example, a sheet having a mirror surface may be used. Further, the reflection sheet 80 does not necessarily have to be disposed in close contact with the bottom surface member 30, and as illustrated in FIG. 8, the reflection sheet 80 is disposed so that the center is lifted from the bottom surface member 30 and has a convex section. It may be. If arranged in this way, the reflected light is likely to go directly to the lead-out surface 11a. Furthermore, for example, when the lead-out surface on the upper surface side of the outer frame 11 is not formed, the reflection sheet 80 b may be disposed on the inner surface of the box-shaped container 20. Thereby, the light which went to the upper surface side can be reflected, and can be derived | led-out from the derivation | leading-out surface 11a.

  As shown in the above-described embodiment, the present invention can be used as an illumination field, particularly as a gate lamp.

DESCRIPTION OF SYMBOLS 10 ... Storage part, 11 ... Outer frame, 11a ... Derived surface, 11b ... Center frame,
11c ... 1st fixing hole, 20 ... Box-shaped container, 21 ... 2nd fixing hole, 26 ... Plug,
30 ... Bottom member, 31 ... Standing wall, 32 ... Electric power equipment accommodating part, 33 ... Screwing hole,
40 ... light source member, 41 ... light source, 42 ... substrate, 45 ... power cord, 46 ... C steel,
47 ... groove, 60 ... light guide plate, 61 ... diffusion dot, 62 ... end face, 63 ... main surface,
70 ... light source support member, 71 ... attachment member, 72 ... wiring space portion,
80, 80a, 80b ... reflection sheet, 90 ... screw, 100 ... gatepost lamp

Claims (5)

An accommodating portion having a lead-out surface for leading light to one or more surfaces other than the bottom surface;
A light source provided in the housing portion;
A light guide plate that is formed on at least one main surface and includes a plurality of diffusion dots that diffuse light incident from an end surface from the main surface, and
The light guide plate is disposed in the housing portion so that an end surface thereof faces the light source, and is disposed at an inclination, and light diffused from a main surface is led out from the lead-out surface. lighting equipment. The accommodating portion is formed in a substantially rectangular parallelepiped, and has at least a lead-out surface on both the front and back surfaces,
The light source is provided at a substantially central position of the front surface and the back surface on the inside of the upper surface of the housing portion or the lower surface of the housing portion,
The lighting apparatus according to claim 1, wherein the light guide plate includes two sheets, and is arranged in a substantially V shape so that a distance from the light source gradually increases downward or upward.   The lighting apparatus according to claim 2, wherein the light source is provided corresponding to each of the two light guide plates.   The lighting apparatus according to claim 1, wherein the light guide plate is curved. The lighting fixture according to any one of claims 1 to 4, wherein at least one part of the inner surface of the housing portion is a reflecting surface.

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