JP2010192119A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device in which downsizing of a lighting device body is achieved and which can illuminate the whole using region with sufficient brightness. <P>SOLUTION: The lighting device 10 includes a linear light source 20 in which a plurality of LED elements 22 are mounted in parallel on a substrate 21 so that the emitting direction of light may be in the same direction, a base board 30 of which one face is open and the linear light source is housed inside from this opening part 34, and a reflecting plate 50 which is arranged on an optical path of emission light from the linear light source. The reflecting plate includes a first reflecting surface 51 and a second reflecting surface 52. The first and second reflecting surfaces meet at the upper position of the central axial line in the linear light source, and is constructed so that the distance from the plane including the emitting face of the LED elements may become larger as they are separated away from the meeting portion 55. Light from the linear light source is reflected by the first reflecting surface and the reflected light illuminates one side region interposing the base board, and light from the linear light source is reflected by the second reflecting surface and the reflected light illuminates the other side region interposing the base board. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an illumination device that reflects light emitted from a light source with a reflector and performs illumination with the reflected light.

  As an example of this type of illumination device, an illumination device as shown in Patent Document 1 is known (see FIGS. 7 to 11 of Patent Document 1). This lighting device is used by being installed on a desk, and has a long base (horizontal material), a rod-like fluorescent tube arranged on the upper surface of the base, and a side of the fluorescent tube. It is comprised from the cover body arrange | positioned over the whole region, and the reflecting plate arrange | positioned above a fluorescent tube. Here, the cover body is for preventing light emitted from the fluorescent tube from directly entering the eyes of the user who uses the desk.

  The desk is a so-called face-to-face desk that has two opposite sides in use, and a panel that divides the top of the desk into two areas is erected in the center of the top, and the top of the panel is The base portion of the lighting device is attached. When the fluorescent tube that is the light source is turned on, the light emitted from the fluorescent tube is emitted upward. Then, the top plate surfaces on both sides partitioned by the panel are indirectly illuminated by the light reflected by the reflecting plate positioned above the fluorescent tube.

Japanese Patent No. 3506060

  In the illumination device disclosed in Patent Document 1, the entire size of the illumination device is increased due to the structure in which the cover is disposed on the side of the fluorescent tube that is the light source. Therefore, the installation location of the lighting device is limited, and there is room for improvement from an aesthetic point of view.

  Further, the lighting device is used in combination with a task light installed on a desk, and when the lighting device is used alone, it cannot be illuminated evenly over the entire area of the top plate surface, There is a problem that the brightness required when the user performs work on the top board cannot be secured.

  In view of the above circumstances, an object of the present invention is to provide a lighting device capable of reducing the size of a lighting device body and illuminating the entire area to be used with sufficient brightness.

  In order to achieve the above object, an illumination device according to claim 1 of the present invention includes a linear light source in which a plurality of LED elements are mounted in parallel on a substrate so that the light emission direction is the same direction. In an illuminating device comprising: a base having an opening, a base in which the linear light source is accommodated, and a reflector disposed on an optical path of light emitted from the linear light source. The reflecting plate includes a first reflecting surface and a second reflecting surface, and the first reflecting surface and the second reflecting surface meet at a position above a central axis of the linear light source; and The distance from the plane including the emission surface of the LED element increases as the distance from the meeting portion increases, and the light emitted from the LED element is reflected by the first reflection surface. While illuminating a region on one side across the base with light, the second In light reflected by the reflecting surface, characterized in that illuminating the region of the other side across the base.

  The lighting device according to claim 2 of the present invention is the lighting device according to claim 1, wherein the first reflecting surface and the second reflecting surface have a substantially V-shaped cross section perpendicular to the longitudinal direction. It is characterized by.

  Moreover, the lighting device according to claim 3 of the present invention is characterized in that in the above-described claim 1 or 2, fine irregularities are formed on the first reflecting surface and the second reflecting surface.

  The lighting device according to claim 4 of the present invention is the lighting device according to claim 1, wherein the reflecting plate is supported by a support column erected on the base, and the support surface of the reflection plate in the support column Is formed in a shape that matches the meeting portion of the first reflector and the second reflector.

  The illumination device of the present invention uses a linear light source in which a plurality of LED elements are mounted in parallel on a substrate as a light source. For this reason, compared with the case where a fluorescent tube is used as a light source as in the prior art, the entire illumination device can be reduced in size and can be configured in various shapes. As a result, it is possible to reduce the restrictions on the installation location of the lighting device. Further, since the lighting device is downsized, the aesthetic appearance of the panel or the like is not impaired when the lighting device is attached to the panel or the like. Furthermore, the illumination device of the present invention includes a first reflecting surface and a second reflecting surface disposed on an optical path of light emitted from the linear light source, and the first reflecting surface and the second reflecting surface. Are configured to meet at a position above the central axis of the linear light source and to increase the distance from the plane including the emission surface of the LED element as the distance from the meeting portion increases. By attaching and using the lighting device configured as described above to a panel or the like, it is possible to illuminate the entire area on both sides partitioned by the panel with sufficient brightness.

  Exemplary embodiments of a lighting device according to the present invention will be described below in detail with reference to the accompanying drawings. Below, the example which attached the illuminating device which concerns on this invention to the panel is demonstrated.

  FIG. 1 is an exploded perspective view showing an outline of a lighting panel 60 including a lighting device 10 according to the present embodiment. In FIG. 1, the lower part of the panel is omitted. 2 is a top view of the lighting device 10 shown in FIG. 1, FIG. 3 is a view of the upper portion of the lighting panel 60 shown in FIG. 1, as viewed from the front, and FIG. FIG. 5 is a sectional view taken along the line B in FIG. In FIG. 5, the reflector 50 is omitted.

  The illumination panel 60 illustrated in FIG. 1 includes an illumination device 10 and a panel unit 11. The illuminating device 10 includes an LED light source unit (linear light source) 20, a base 30 in which the LED light source unit 20 is accommodated, a pair of pillars 40 erected on the upper surface of the base 30, and a pair of pillars 40. And a reflection plate 50 supported by the substrate.

  The LED light source unit 20 is a linear light source in which a plurality of LED elements (surface-mounted light emitting diodes) 22 are linearly mounted on a long substrate 21 at equal intervals. As the LED element 22, a chip-type LED whose emission color is white is used. The substrate 21 is a flat plate made of aluminum. In the present embodiment, as the LED light source unit 20, a structure in which 20 LED elements 22 are arranged on a substrate 21 having a width of about 10 mm, a length of about 740 mm, and a thickness of about 2 mm is applied.

  The LED element 22 is a light source having a high directivity as compared with a fluorescent lamp or an incandescent lamp, but there are various types from a narrow-angle type with a light emission angle (emission range) to a wide-angle type with 120 °. Are known. In the present embodiment, the LED elements 22 having an emission angle of 120 ° are arranged at intervals of 22 mm so that the light emission direction is the same direction. Thereby, linear illumination with uniform illuminance is obtained.

  The plurality of LED elements 22 mounted on the substrate 21 are connected through a wiring 23 to an AC / DC converter (AC / DC converter) that converts an AC voltage 100V from a commercial power source into a DC voltage 24V. The AC / DC converter is connected to a switch (not shown) via a wiring.

  The base 30 is a long member that houses the LED light source unit 20 described above. The base 30 is formed by extruding aluminum or an aluminum alloy, and includes an upper surface portion 31, side surface portions 32a and 32b, and a lower surface portion 33 as shown in FIG. Yes. An opening 34 extending along the longitudinal direction of the base 30 is formed in the upper surface portion 31 of the base 30, and the light source accommodating portion 35 surrounded by the side surfaces 32 a and 32 b inside the opening 34. Is provided.

  The light source housing part 35 is a recess for housing the LED light source unit 20 described above. The width direction dimension and the longitudinal direction dimension of the light source accommodating portion 35 are formed to be approximately the same size as the LED light source unit 20, and the height dimension thereof is deep enough to accommodate the LED element 22. Yes. As shown in FIG. 4, the opening 34 of the light source container 35 is closed with a dustproof cover 36 made of a transparent plate made of acrylic. Further, as shown in FIG. 3, a through hole 35 a for passing the wiring 23 of the LED light source unit 20 is formed so as to penetrate the lower surface portion 33 from the bottom wall portion of the light source housing portion 35.

  As shown in FIG. 4, concave portions 37 a and 37 b along the longitudinal direction of the base 30 are provided at both ends of the lower surface portion 33 of the base 30. The concave portions 37a and 37b are portions into which upper end portions 12a and 13a of panel members 12 and 13 of the panel portion 11 described later are respectively fitted. The base 30 applied in the present embodiment has a height of about 30 mm, a width of about 28 mm, and a length of about 900 mm, and the light source housing portion 35 of the base 30 has a width of about 10 mm and a length of 740 mm. It has a size of about 9 mm in depth.

  The support column 40 is a square member that supports a reflection plate 50 described later, and is erected on both left and right end portions of the upper surface portion 31 of the base 30, that is, on both sides of the opening portion 34. The support column 40 is made of aluminum or an aluminum alloy. As shown in FIG. 1, the support column 40 is bolted in a state where the lower end portion is fitted in a hole 39 formed in the upper surface portion 31 of the base 30 (see FIG. 3). It is attached and fixed to the upper surface portion 31 of the table 30. The column 40 applied in the present embodiment has a size of about 15 mm square and a height of about 30 mm.

  A reflection plate 50 described later is supported on the upper surface portion 41 of the support column 40. As shown in FIG. 1, the first reflecting surface 51 and the second reflecting surface 52 of the reflecting plate 50 have a substantially V-shaped cross section perpendicular to the longitudinal direction. Therefore, the upper surface portion 41 of the support column 40 that supports the reflecting plate 50 is formed in a V shape that matches the shape of the vicinity of the meeting portion 55 of the first reflecting surface 51 and the second reflecting surface 52. In addition, the code | symbol 42 in FIG. 5 is a bolt hole for attaching the reflecting plate 50. FIG.

  The reflecting plate 50 is a long member for reflecting the light emitted from the LED light source unit 20 described above, and is formed by extruding aluminum or an aluminum alloy. As shown in FIGS. 1 and 2, the length of the reflecting plate 50 in the longitudinal direction is substantially the same as the length of the base 30 in the longitudinal direction. Moreover, the dimension in the width direction of the reflecting plate 50 is formed larger than the dimension in the width direction of the LED light source unit 20. The reflector 50 applied in the present embodiment is formed to have a width dimension of about 80 mm. The reflector 50 is disposed above the base 30 and on the optical path of the emitted light from the LED light source unit 20 via the support column 40 described above.

  As shown in FIG. 4, the reflecting plate 50 includes a first reflecting surface 51 and a second reflecting surface 52. The first reflecting surface 51 and the second reflecting surface 52 meet at a position above the central axis L (see FIG. 2) in the LED light source unit 20, and as the distance from the meeting portion 55 increases, the LED element 22. Are arranged so as to be inclined so that a distance X (see FIG. 4) between the plane and the plane including the emission surface increases. More specifically, the cross-sectional shape orthogonal to the longitudinal direction of the first reflecting surface 51 and the second reflecting surface 52 is substantially V-shaped so as to protrude toward the LED light source unit 20 as shown in FIG. Is made. In the present embodiment, the strength of the reflecting plate 50 is improved by providing the upper surface 53 above the first reflecting surface 51 and the second reflecting surface 52. However, the upper surface 53 may be omitted if the required strength is ensured.

  Although illustration is omitted, the first reflecting surface 51 and the second reflecting surface 52 are subjected to rough surface processing such as embossing or embossing to form fine irregularities such as a pear surface. Yes. A wider area can be illuminated by irregularly reflecting the emitted light from the LED light source unit 20 with the fine irregularities formed on the first reflecting surface 51 and the second reflecting surface 52.

  The reflection plate 50 described above is bolted in a state where the meeting portion 55 of the first reflection surface 51 and the second reflection surface 52 is in contact with the upper surface portion 41 of the support column 40 (see FIG. 3). , Attached to the support column 40 and fixed. End covers 38 and 54 are attached to the left and right ends of the base 30 and the reflector 50, respectively, as shown in FIG.

  As shown in FIG. 4, the panel portion 11 is a plate material formed by interposing a spacer 14 between a pair of flat plate members 12 and 13. The pair of flat plate members 12 and 13 are made of a material such as wood or synthetic resin. As shown in FIG. 1, the length dimension and the thickness dimension of the panel portion 11 have substantially the same length as the longitudinal dimension and the width dimension of the base 30 in the lighting device 10. Moreover, the height dimension of the panel part 11 is about 450 mm, when attaching to the top plate of a desk. End covers 15 are attached to the left and right ends of the panel portion 11 as shown in FIG. 3, and the left and right ends of the panel portion 11 and the base 30 are substantially flush.

  As shown in FIG. 4, the lighting device 10 described above is configured such that the concave portions 37 a and 37 b provided on the lower surface portion 33 of the base 30 are fitted to the upper end portions 12 a and 13 a of the pair of flat plate members 12 and 13 of the panel portion 11. The bolts are fastened together (see FIG. 3), and are attached and fixed to the upper end portion of the panel portion 11.

  6 is a side view of the above-described lighting panel 60, and FIG. 7 is an enlarged view of a portion of the lighting device 10 in FIG. The arrows shown in FIGS. 6 and 7 conceptually indicate light that is emitted from the LED light source unit 20 and reflected by the first reflecting surface 51 and the second reflecting surface 52. In addition, in FIG. 6, the shape of the base 30 is simplified and shown. Hereinafter, the operation of the illumination device 10 will be described with reference to FIGS. 6 and 7.

When the LED light source unit 20 in the illumination device 10 is switched on, all the LED elements 22 on the substrate 21 in the LED light source unit 20 are turned on and light is emitted upward. Of the light emitted from the LED element 22, the light incident on the first reflecting surface 51 is reflected toward the use area A ₁ on one side across the illumination panel 60, and the use area A ₁ and the use area A. _The surface S ₁ arranged at ₁ is illuminated. On the other hand, among the light emitted from the LED element 22, light incident on the second reflecting surface 52 is reflected toward the use region A ₂ of sandwiching the lighting panel 60 other side, the use area A ₂ and using illuminating the surface _{S 2} which is disposed in the region _{a 2.} Here, the used area A _1, A _2, a space where the user performs an operation or the like, and means a region to be illuminated.

  As shown in FIG. 7, since the light emitted from the LED element 22 is incident on the first reflecting surface 51 and the second reflecting surface 52 at various incident angles, the reflected light spreads over a wide range. At this time, the first reflecting surface 51 and the second reflecting surface 52 need to have a sufficient size (dimension in the width direction) to reflect all the emitted light from the LED element 22. From the viewpoint of miniaturization, it is necessary to form so as not to be larger than necessary. Therefore, as shown as an example in FIG. 7, light having the largest emission angle out of the light emitted from the LED element 22 is reflected in the vicinity of the end portions of the first reflection surface 51 and the second reflection surface 52. Thus, it is preferable to determine the sizes of the first reflecting surface 51 and the second reflecting surface 52.

As shown in FIG. 7, an angle θ ₁ (hereinafter referred to as an inclination of the first reflecting surface) formed between the first reflecting surface 51 and the horizontal surface including the meeting portion 55 of the first reflecting surface 51 and the second reflecting surface 52. The larger the angle θ ₁ ) is, the wider the range of possible incident angles of light incident on the first reflecting surface 51 is, and the larger the incident angle, the more distant from the panel unit 11. Can illuminate. Similarly, the larger the angle θ ₂ formed between the horizontal plane including the meeting portion 55 and the second reflecting surface 52 (hereinafter referred to as the inclination angle θ ₂ of the second reflecting surface), the larger the second reflecting surface 52 becomes. Since the range in which the incident angle of incident light can be taken is wide and the incident angle is large, a position further away from the panel portion 11 can be illuminated. Therefore, the inclination angles θ ₁ and θ ₂ of the first reflecting surface 51 and the second reflecting surface 52 are the sizes of the use areas A ₁ and A ₂ (distance from the panel unit 11), and the surfaces S ₁ and S to be illuminated. so as determined according to the magnitude of S _2.

Here, when the first reflection surface 51 and the second reflection surface 52 are mirror surfaces, the inclination angles θ ₁ and θ ₂ of the first reflection surface 51 and the second reflection surface 52 are increased. It is considered that the amount of light reaching the vicinity of the panel portion 11 is reduced and the vicinity of the surface of the panel portion 11 is darkened. In the present embodiment, as described above, the first reflective surface 51 and the second reflective surface 52 are subjected to fine unevenness processing, and light is irregularly reflected by the fine unevenness, so that the vicinity of the surface of the panel portion 11 can be obtained. It can be illuminated with sufficient brightness.

  In addition, the shorter the distance from the LED light source unit 20 to the reflecting plate 50, the smaller the size of the reflecting plate 50 can be. However, the light incident on the first reflecting surface 51 and the second reflecting surface 52 can be reduced. Since the range in which the incident angle can be reduced, it is considered that the illumination range is narrowed. On the contrary, the longer the distance from the LED light source unit 20 to the reflecting plate 50, the wider the range of incident angles of light incident on the first reflecting surface 51 and the second reflecting surface 52, respectively. However, it is necessary to increase the size of the reflector 50 accordingly.

Thus, the emission angle of the LED element 22, the inclination angles θ ₁ and θ _{2 of} the first reflection surface 51 and the second reflection surface 52, the distance from the LED light source unit 20 to the reflection plate 50, the first reflection surface By specifying the surface finish of 51 and the 2nd reflective surface 52 according to the magnitude | size of the area | region to illuminate, while obtaining the efficient light distribution according to the area | region to illuminate while reducing a illuminating device main body. Can do.

In FIG. 7, the inclination angles θ ₁ and θ ₂ on the first reflecting surface 51 and the second reflecting surface 52 are the same, but when the use area A ₁ and the use area A ₂ are different in width. May have different inclination angles θ ₁ , θ ₂ . For example, when the use area A ₂ is wider than the use area A ₁ , the inclination angle θ ₂ is set larger than the inclination angle θ ₁ .

  Moreover, although the light itself emitted from the LED element 22 does not generate heat, the LED light source unit 20 itself generates a large amount of heat, and thus it is necessary to radiate the heat generated by the LED light source unit 20. In the present embodiment, as described above, the base 30, the support column 40, and the reflecting plate 50 that constitute the lighting device 10 are formed of an aluminum molded product having a high heat transfer rate. The whole has a function as a heat sink having a large surface area. Therefore, the heat generated from the LED light source unit 20 can be effectively radiated. Further, when the lighting device 10 is attached to the panel unit 11 to form the lighting panel 60, the entire lighting panel 60 can be dissipated by conducting heat of the lighting device 10 to the panel unit 11.

  The lighting device 10 shown in FIGS. 1 to 7 is configured to be attached to the upper end portion of the panel portion 11 with the base 30 exposed to the outside. However, as shown in FIG. It is good also as a structure which accommodated in the upper end part of the panel part 11. FIG. FIG. 8 is a schematic exploded perspective view showing an example of the lighting device 10 in which the base 30 is accommodated in the upper end portion of the panel portion 11. In the example shown in FIG. 8, the base 30 is accommodated in the upper end portion of the panel portion 11, the cover 56 is attached to the upper portion, and the support column 40 is erected on the cover 56 to support the reflecting plate 50. It is said. The base 30 shown in FIG. 8 is a long box body that is formed in a size that can be completely accommodated in the space between the flat plate members 12 and 13 in the panel unit 11, and has an upper opening. The LED light source unit 20 is accommodated in the opening 34. The cover 56 is large enough to cover the entire upper end opening of the panel 11, and has an opening 57 (through hole) at a portion corresponding to the LED light source unit 20 accommodated in the base 30. Are formed, and struts 40 are erected on both left and right ends thereof. The shapes of the LED light source unit 20, the support column 40, and the reflecting plate 50 are the same as the examples shown in FIGS. Thus, by making the base 30 accommodated in the upper end portion of the panel portion 11, the appearance of the lighting panel 60 can be further improved, and the heat generated from the LED light source unit 20 can be increased by the cover 56, It is possible to effectively dissipate heat by conducting to the column 40 and the reflection plate 50.

  FIG. 9 is a schematic perspective view showing an example in which the lighting panel 60 configured as described above is attached to a desk, and FIG. 10 is a side view of FIG. In addition, in FIG. 10, the light radiate | emitted from the illuminating device 10 is notionally shown by the arrow. 9 and 10, the LED light source unit 20 is not shown. A desk 70 illustrated in FIG. 9 is a one-sleeved desk provided with a top plate 71, side legs 72 and 73, and a drawer 75. Below, the side (user side) by which the chair 80 where the user who uses a desk is arrange | positioned is set as the front side of the desk 70, and the other side (side facing a user) is made into a back side.

The lower end portion of the lighting panel 60 is attached and fixed to the rear side surface portion 76 of the top plate 71 by a fixing means (not shown) such as a bolt. The inclination angles θ ₁ and θ ₂ (see FIG. 7) in the first reflecting surface 51 and the second reflecting surface 52 of the illumination device 10 are the same angle. Although illustration is omitted, the switch of the illuminating device 10 is provided on the top plate 71, for example, so that the user of the desk can operate the switch ON / OFF.

When the lighting device 10 is switched on by the user's operation, the LED light source unit 20 in the lighting device 10 is turned on and light is emitted upward. As shown in FIG. 10, the light incident on the first reflecting surface 51 is reflected toward the use area A1 on _one side across the illumination panel 60, and the upper area of the top board 71 and the top board surface S are sufficiently reflected. Illuminate with high brightness. Meanwhile, light incident on the second reflecting surface 52 is reflected toward the use region A ₂ of sandwiching the lighting panel 60 other side, to illuminate the use area A ₂ at sufficient brightness. Incidentally, the region A ₂ can be utilized lighting and to passages such as floor F, bulletin affixed to the surface of the panel portion 11 lighting, etc. (not shown), a variety of purposes.

  The first reflecting surface 51 and the second reflecting surface 52 are subjected to fine uneven processing. For this reason, since the light is irregularly reflected by the fine unevenness, the entire upper surface S of the top plate 71 and the vicinity of the surface of the panel unit 11 can be illuminated with sufficient brightness.

Note that when the use area A ₁ and the use area A ₂ are different in width, the inclination angles θ ₁ and θ ₂ of the first reflection surface 51 and the second reflection surface 52 of the reflection plate 50 may be different. Good. For example, when the use area A ₂ on the other side is wider than the use area A ₁ on the top plate 71 of the desk 70, the inclination of the second reflection surface 52 is larger than the angle θ ₁ of the first reflection surface 51. What is necessary is just to enlarge angle (theta) ₂ .

Next, FIG. 11 is a schematic perspective view showing an example in which another desk is placed facing the desk to which the lighting panel 60 is attached, and FIG. 12 is a side view of FIG. The desk 70A and the desk 70B are single-sleeved desks having the same configuration and the same dimensions, and the lower end portion of the lighting panel 60 is attached to the rear side surface portion 76 of the top plate 71A of one desk 70A. Then, another desk 70B is arranged in such a manner that it faces the desk 70A to which the lighting panel 60 is attached. As shown in FIG. 12, the distance from the illumination panel 60 to the front end of the top plate 71A and the distance from the illumination panel 60 to the front end of the top plate 71B are substantially the same. That is, use area _{A 1} and _{A 2} are approximately the same size.

When the lighting device 10 is switched on by the user's operation, the LED light source unit 20 in the lighting device 10 is turned on and light is emitted upward. Light incident on the first reflecting surface 51, as shown in FIG. 12, and reflected toward the use region A ₁ on one sandwiching a lighting panel 60 side, of the top plate 71A upper region and the top plate surface S ₁ Illuminate the whole with sufficient brightness. Meanwhile, light incident on the second reflecting surface 52 is reflected toward the use region A ₂ of sandwiching the lighting panel 60 other side, the whole of the upper region and the top plate surface S ₂ of the top plate 71B sufficient brightness Now illuminate. Since the first reflective surface 51 and the second reflective surface 52 are subjected to fine unevenness processing, light is diffusely reflected by the fine unevenness so that the vicinity of the surface of the panel unit 11 is illuminated with sufficient brightness. can do. Thus, when the illumination panel 60 is installed on a face-to-face desk or table, light can be efficiently reflected to both desks 70A and 70B.

  9 to 12, when the lighting panel 60 is installed on a desk and used, the first reflecting surface 51 and the second reflecting surface 52 of the reflecting plate 50 are in the field of view of the user. In addition to 10 actual illuminances, sensory brightness can be obtained. In addition, since the first reflective surface 51 and the second reflective surface 52 are subjected to the fine unevenness described above, the first reflective surface 51 and the second reflective surface 52 are dazzled when entering the user's field of view. This can be suppressed.

  9 to 12 show an example in which the lower end portion of the lighting panel 60 is attached to the rear side surface portion of the desk top plate and illuminated from the front of the user, the lower end portion of the lighting panel 60 is attached to the top of the desk. You may make it illuminate from a user's side by attaching to the side part on either side of a board.

  As described above, the illuminating device 10 of the present embodiment uses the LED light source unit 20 in which a plurality of LED elements 22 are mounted in parallel as a light source. For this reason, compared with the case where a fluorescent tube is used as a light source as in the prior art, the entire illumination device can be reduced in size and can be configured in various shapes. As a result, it is possible to reduce the restrictions on the installation location of the lighting device. Further, since the lighting device is reduced in size and is not noticeable, the appearance of the panel or the like is not impaired when the lighting device is attached to the panel or the like.

  Moreover, the illuminating device 10 of this Embodiment is provided with the 1st reflective surface 51 and the 2nd reflective surface 52 which were arrange | positioned on the optical path of the emitted light from the LED light source unit 20, This 1st reflective surface. 51 and the second reflecting surface 52 meet at a position above the central axis L in the LED light source unit 20, and the distance from the plane including the emitting surface of the LED element 22 increases as the distance from the meeting portion 55 increases. It is configured to be large. As an example, the first reflecting surface 51 and the second reflecting surface 52 in the present embodiment are formed in a substantially V shape in which the cross-sectional shape orthogonal to the longitudinal direction thereof is convex toward the LED light source unit 20 side. ing. As described above, since the first reflecting surface 51 and the second reflecting surface 52 are formed in a substantially V shape, there is almost no reflected light returning to the light source, and the areas on both sides sandwiching the panel portion 11 are efficient. Light can be reflected well, and the entire area on both sides can be illuminated with sufficient brightness. Moreover, when using the illuminating device 10 on a desk, since the 1st reflective surface 51 and the 2nd reflective surface 52 enter into a user's visual field, compared with the actual illumination intensity of the illuminating device 10, it is sensory. You can get a good brightness. In addition, since a plurality of light sources are arranged, there is no possibility of creating a shadow in a single direction that is obstructive on the desk surface.

Further, according to the illumination device 10 of the present embodiment, the emission angle of the LED element 22, the inclination angles θ ₁ and θ _{2 of} the first reflection surface 51 and the second reflection surface 52, and the LED light source unit 20 to the first angle. By specifying the distance to the reflective surface 51 and the second reflective surface 52 according to the width of the illuminated area, an efficient light distribution according to the illuminated area can be obtained.

  Moreover, according to the illuminating device 10 of this Embodiment, the fine unevenness | corrugation is formed in the 1st reflective surface 51 and the 2nd reflective surface 52 by embossing etc., and LED light source unit 20 by this fine unevenness | corrugation The diffused light is diffusely reflected, so that the surface of the panel unit 11 and the top plate surface of the desk can be widely irradiated.

  Furthermore, according to the illuminating device 10 of this Embodiment, the base 30, the support | pillar 40, and the reflecting plate 50 which comprise the illuminating device 10 were comprised with the molded product made from aluminum with a high heat conductivity, LED light source Heat generated from the unit 20 can be effectively dissipated.

  In addition, according to the lighting device 10 of the present embodiment, the support 40 of the reflecting plate 50 in the support column 40 has a shape that matches the shape of the vicinity of the meeting portion 55 of the reflecting plate 50, so that the support column 40 rotates. It can fix with one volt | bolt, without doing. Further, the angles of the first reflecting surface 51 and the second reflecting surface 52 of the reflecting plate 50 can be stabilized.

  In the above-described embodiment, the example in which the plurality of LED elements 22 are arranged in a straight line as the LED light source unit 20 has been described. However, a configuration in which the plurality of LED elements 22 are arranged in a curved shape may be used. For example, in the case where the lighting device 10 is installed at the upper end of a panel or the like having a curved cross section in the horizontal direction, the LED light source unit 20, the base 30, and the reflection plate 50 are shaped according to the shape of the curved panel. To form. In this way, by using a linear light source composed of a plurality of LED elements 22, the illumination device 10 is installed on an installation object such as a panel as compared with the case where a fluorescent lamp having a linear shape and a predetermined length is used. The degree of freedom becomes higher.

  Moreover, in the said embodiment, although the cross-sectional shape formed in the substantially V shape was used as the reflecting plate 50 (the 1st reflective surface 51 and the 2nd reflective surface 52), it is limited to this. Instead, it is also possible to use a reflector having another shape such as a substantially U-shaped cross section.

  Moreover, in the said embodiment, although the example which attached the illuminating device 10 to the upper end part of the panel part 11 was demonstrated as the illuminating panel 60 provided with the illuminating device 10, the illuminating device was attached to the right and left side edge part of the panel part 11. FIG. 10 may be attached.

It is the disassembled perspective view which showed the outline of the illumination panel provided with the illuminating device which is this Embodiment. It is a top view of the illuminating device shown in FIG. It is the figure which looked at the upper part of the lighting panel shown in FIG. 1 from the front. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is an arrow B figure of FIG. It is the side view of an illumination panel, and is the figure which showed notionally the direction of the light reflected by a reflecting plate. It is the figure which expanded and showed the part of the illuminating device shown in FIG. It is the disassembled perspective view which showed the other example of the shape of the illuminating device. It is a schematic perspective view which shows an example which attached the illumination panel to the desk. FIG. 10 is a side view of FIG. 9. It is a schematic perspective view which shows the other example which attached the illumination panel to the desk. It is a side view of FIG.

DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Panel part 12, 13 Flat plate member 12a, 13a Upper end part of flat plate member 14 Spacer 15 End cover 20 LED light source unit 21 Substrate 22 LED element 23 Wiring 30 Base 31 Upper surface part 32a, 32b Side surface part 33 Lower surface part 34 Opening 35 Light source housing part 36 Dustproof cover 37a, 37b Recess 38 End cover 39 Hole 40 Post 41 (Upper part) Top face part 42 Bolt hole 50 Reflector 51 First reflector 52 Second reflector 53 (Reflector) ) Upper surface 54 end cover 55 meeting portion 56 cover 57 (cover) opening 60 lighting panel 70, 70A, 70B desk 71, 71A, 71B top plate 72, 72B side leg 73, 73A side leg 75 drawer 76 (top plate) 80) chair on the back side

Claims (4)

A linear light source in which a plurality of LED elements are mounted in parallel on a substrate so that the light emission direction is the same direction;
One surface is opened and a base in which the linear light source is accommodated from the opening,
In a lighting device comprising a reflector disposed on the optical path of light emitted from the linear light source,
The reflection plate includes a first reflection surface and a second reflection surface,
The first reflection surface and the second reflection surface meet at a position above the central axis of the linear light source, and between the plane including the emission surface of the LED element as the distance from the meeting portion increases. Configured to increase the distance,
Of the light emitted from the LED element, the light reflected by the first reflective surface illuminates a region on one side across the base, while the light reflected by the second reflective surface, An illumination device that illuminates a region on the other side across the base. The first reflecting surface and the second reflecting surface are:
The lighting device according to claim 1, wherein a cross-sectional shape perpendicular to the longitudinal direction is substantially V-shaped.   The illumination device according to claim 1, wherein fine irregularities are formed on the first reflection surface and the second reflection surface. The reflector is supported by a support column erected on the base,
2. The lighting device according to claim 1, wherein a support surface of the reflecting plate in the support column is formed in a shape that matches a meeting portion of the first reflecting plate and the second reflecting plate.

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