JP2012164501A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system capable of emitting light with controlled light distribution in one direction (for instance, a downward direction) without increasing the number of substrates (only by installing the substrate for mounting an LED light source directing its optical axis horizontally to a side face of a columnar supporting member).SOLUTION: The light source for illumination 1 and a light-distribution controlling lens 2 are installed only on the side face 26a of the columnar support member, and the light-distribution controlling lens 2 is made to emit light from the light source for illumination 1 in one direction Y (for instance, a downward direction). On a top side surface of a Y direction side of the columnar support member, a lens means 72 possessing at least one lens-cut part 73a, 73b, 73c and 73d is mounted for controlling the emitted light from the light-distribution controlling lens 2 deflected toward inside.

Description

  The present invention relates to a lighting device.

  Conventionally, for example, as shown in Patent Document 1 and Patent Document 2, a plate-like substrate is provided that is arranged perpendicular to a horizontal plane so that the optical axis of the LED light source is perpendicular to the substrate. LED lighting devices and LED lamps in which an LED light source is mounted on a substrate are known.

  In the LED illumination device disclosed in Patent Document 1, the optical axis of the LED light source mounted on the substrate arranged perpendicular to the horizontal plane is directed horizontally. Therefore, a part of the light from the LED light source mounted on the vertical substrate is irradiated downward. In addition, in the LED lighting device shown in Patent Document 1, a substrate arranged to form an acute angle with respect to the horizontal plane is provided separately from the substrate arranged perpendicular to the horizontal plane. An LED light source is mounted on the lower surface of the substrate. Furthermore, the light from the LED light source mounted on the substrate is irradiated downward. As a result, in the LED illuminating device shown in Patent Document 1, the LED light source mounted on a vertical substrate and the LED light source mounted on a substrate that forms an acute angle with respect to the horizontal plane are directed downward at various angles with the horizontal plane. Can be irradiated.

  Further, as shown in FIGS. 1 and 2 (FIG. 1 is a perspective view, FIG. 2 is a cross-sectional view), the LED lamp disclosed in Patent Document 2 includes a support member 104 and a base 107, and supports the LED lamp. Six plate-like substrates 111 are arranged on the side surface of the member 104, one hexagonal substrate 112 is arranged on the top surface of the support member 104, and the six plate-like substrates 111 and one hexagonal substrate 112 are A plurality of LEDs 102 are arranged vertically and horizontally.

  However, in the LED illumination devices and LED lamps of Patent Document 1 and Patent Document 2, in addition to horizontal light, in order to emit light in a direction perpendicular to the horizontal direction, the optical axis is directed horizontally. In addition to the LED light source, it is necessary to further provide an LED light source whose optical axis is oriented in the vertical direction. As a result, the LED illumination device and the LED lamp of Patent Literature 1 and Patent Literature 2 have a problem that the cost of the LED illumination device and the LED lamp as a whole increases.

  In order to solve this problem, it is possible to irradiate downward (or upward) light having various angles with a horizontal plane without providing an LED light source whose optical axis is oriented in a direction perpendicular to the horizontal direction. An LED lighting device and an LED lamp that can be used are desired among those skilled in the art.

  Specifically, it is necessary to provide a substrate for mounting the LED light source with the optical axis oriented downward (or upward) separately from the substrate for mounting the LED light source with the optical axis oriented horizontally. In addition, LED lighting devices and LED lamps that can emit downward (or upward) light at various angles with a horizontal plane are desired among those skilled in the art.

  That is, an LED illumination device and an LED lamp that can irradiate downward (or upward) light at various angles with the horizontal plane while reducing the number of substrates are desired among those skilled in the art.

JP 2010-179664 A JP 2010-182796 A

  The present invention does not increase the number of substrates (only by attaching a substrate for mounting an LED light source whose optical axis is oriented horizontally to only the side surface of a columnar support member) in one direction. An object of the present invention is to provide an illuminating device that can emit light by controlling the light distribution in a downward direction (for example, in a downward direction) (it is possible to widen the irradiation range).

  In order to solve the above-mentioned problem, the invention according to claim 1 arranges an illumination light source and a light distribution control lens only on a side surface of a columnar support member, and the light distribution control lens is formed from the illumination light source. The light is emitted in one of the left and right directions with respect to a predetermined reference axis perpendicular to the central axis of the columnar support member or in one of the upper and lower directions with respect to the predetermined reference axis. The top surface of the columnar support member on the one direction side has at least one lens cut portion for controlling the deflection of the light emitted from the light distribution control lens inward. The lens means is arranged.

  According to the first aspect of the present invention, the illumination light source (for example, LED) and the light distribution control lens are disposed only on the side surface of the columnar support member, and the light distribution control lens is the illumination light source (for example, LED ) Is emitted in one of the left and right directions with respect to a predetermined reference axis perpendicular to the central axis of the columnar support member or in one of the upper and lower directions with respect to the predetermined reference axis. At least one lens cut portion for controlling the deflection of the light emitted from the light distribution control lens inward on the top surface of the columnar support member in the one direction. Since the lens means having the above is arranged, the number of the substrates is not increased (that is, the substrate for mounting the LED light source with the optical axis oriented horizontally is arranged on the side surface of the columnar support member. Only install Light) having various angles in one direction (for example, the downward direction) can be emitted (for example, a wide irradiation range can be made downward), and the columnar support member Even when a glove (for example, a milky white small-diameter glove) is attached so that the top of the glove is located opposite to the top surface in the one direction, the vicinity facing the top surface of the support member of the glove It is possible to prevent dark spots from occurring.

It is a perspective view of the LED lamp shown by patent document 2. FIG. It is sectional drawing of the LED lamp shown by patent document 2. FIG. It is a figure which shows the example of application to the illuminating lamp (for example, street light) of the illuminating device (illuminating lamp) of this invention. It is a figure which shows the example of application to the illuminating lamp (for example, street light) of the illuminating device (illuminating lamp) of this invention. It is a figure which shows the example of application to the illuminating lamp (for example, street light) of the illuminating device (illuminating lamp) of this invention. It is a figure which shows the example of application to the illuminating lamp (for example, street light) of the illuminating device (illuminating lamp) of this invention. It is a figure which shows the example of application to the illuminating lamp (for example, street light) of the illuminating device (illuminating lamp) of this invention. It is a figure which shows the structural example of the lens for illumination of this invention, and an illuminating device. It is an enlarged view of the incident part of the lens for illumination of FIG. FIG. 9 is an enlarged view of an emission part of the illumination lens in FIG. 8. It is a figure which shows the emitted optical path in case the lens for illumination is like FIG. It is a figure which shows roughly the emission direction (irradiation direction) of the emitted light from the emission part of each six light distribution control lenses. It is a figure which shows the covering member provided in the top surface of a supporting member. It is a figure which shows the covering member provided in the top surface of a supporting member. It is a figure for demonstrating the dark spot which generate | occur | produces near the top part of a globe. It is a figure (sectional drawing) which shows the structural example of the illuminating device (illumination lamp) of this invention. It is a figure (plan view) showing an example of lens means. It is an expanded sectional view showing an example of a lens cut part. It is a figure which shows schematically the emitted light radiate | emitted from a lens means. It is a figure which shows the example of application to the illuminating lamp (street lamp) of the illuminating device of FIG. It is a figure which shows the directional characteristic of the illuminating lamp (street light) of the structure of FIG. 20 using the illuminating device of FIG. It is a figure which shows the directional characteristic of the illuminating lamp (street light) of the structure of FIG. 3 using the illuminating device of FIG. It is a figure which shows a mode that the emitted light from the lens for light distribution control is deflection-controlled in a more inward direction, and is radiate | emitted. It is a figure (plan view) showing a modification of lens means. It is a figure (plan view) showing a modification of lens means. It is a figure which shows the modification of the illuminating device of FIG. It is the figure which turned the upper and lower sides of FIG. 20 upside down.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  3, 4, 5, and 6 are diagrams illustrating an application example of the illumination device (illumination lamp) of the present invention to an illumination lamp (for example, a street lamp). 3 is a perspective view of the entire illumination lamp (for example, street lamp) 50, FIG. 4 is a perspective view of a portion of the illumination apparatus (illumination lamp) 21 in FIG. 3, and FIG. 5 is an illumination apparatus (illumination lamp) in FIG. FIG. 6 is a schematic plan view seen from the direction B of the illumination device (illumination lamp) 21 of FIG.

  First, referring to FIGS. 4, 5, and 6, in this illumination device (illumination lamp) 21, eight substrates 22 are attached to eight rectangular side surfaces 26 a of a regular octagonal columnar support member 26.

  On the eight substrates 22, illumination light sources (for example, LED light sources) 1 (in the example of FIG. 5, six illumination light sources (for example, LED light sources 1) for each substrate 22, respectively) have a predetermined interval. A light distribution control lens 2 as described later is provided so as to correspond to each of the illumination light sources (for example, LED light sources) 1. In FIG. 6, for the sake of simplicity, the illustration of the illumination light source (for example, LED light source) 1 and the light distribution control lens 2 is omitted. In FIG. 7, one substrate 22 on which light distribution control lenses 2 corresponding to each of six illumination light sources (LED light sources) 1 and each of six illumination light sources (for example, LED light sources) 1 is installed. A perspective view is shown.

  Referring to FIG. 5, an illumination light source (for example, an LED light source) 1 is mounted on a substrate 22 with its optical axis oriented horizontally. Further, the light distribution control lens 2 transmits light from an illumination light source (for example, an LED light source) 1 to a predetermined reference axis X1 (described later) perpendicular to the central axis Z of the regular octagonal columnar support member 26 as described later. As shown in FIG. 5, the light source (for example, LED light source) coincides with the optical axis of the illumination light source 1), and the left or right direction with respect to the predetermined reference axis X1 (see FIG. 3, 4, 5, and 7, they are attached so as to emit light under light distribution control in the downward direction Y).

  Each of the light distribution control lenses 2 shown in FIGS. 5 and 7 (more specifically, each of the six light distribution control lenses 2 (1), 2 (2), 2 (3), 2 (4) 2 (5), 2 (6)) uses, for example, an illumination lens described in a prior application (Japanese Patent Application No. 2011-6183) by the applicant of the present application.

  FIG. 8 is a diagram showing a configuration example of the illumination lens (light distribution control lens) 2 described in the prior application (Japanese Patent Application No. 2011-6183) by the applicant of the present application. 9 is an enlarged view of an incident portion of the light distribution control lens in FIG. 8, and FIG. 10 is an enlarged view of an emission portion of the light distribution control lens in FIG.

  Referring to FIG. 8, the light distribution control lens 2 has a predetermined reference axis X <b> 1 perpendicular to the base surface B, and an incident portion into which light emitted from the illumination light source (for example, LED light source) 1 is incident. 3 and the light incident from the incident portion 3 in either the left or right direction with respect to the predetermined reference axis X1 or the upper or lower direction with respect to the predetermined reference axis X1 (shown in FIG. 8). In the example, it is provided with an emission part 4 that emits light in the downward direction Y).

  The light distribution control lens 2 is formed of a material having a predetermined refractive index, such as transparent PMMA (acrylic resin) or transparent PC (polycarbonate resin). Further, as shown in FIG. 7, the light distribution control lens 2 has a columnar shape in the depth direction of FIG. 8 (that is, from the front side to the back side of the paper). Further, hereinafter, the description will be made assuming that the emitting unit 4 emits the light incident from the incident unit 3 in the downward direction Y as the one direction.

  Referring to FIGS. 8 and 9, the incident portion 3 has a predetermined angle centered on the first axis X1 (θ1 = 0 °) when the predetermined reference axis X1 is the first axis. A first incident surface (lens surface) 11 that makes light in a range Δθ1 (for example, −22.5 ° to 22.5 °) substantially parallel to the first axis X1, and the first axis A predetermined angle range Δθ2 (for example, from −22.5 ° to about 22.5 °) centered on a second axis X2 that forms a predetermined angle θ2 (for example, −45 °) in the one direction (downward direction Y) with X1. 22.5 °), a second incident surface (lens surface) 12 that makes the light substantially parallel to the second axis X2, and the first axis X1 and the one direction (downward direction Y). A predetermined angle range Δθ3 (for example, −22.5 °) centered on the third axis X3 that forms a predetermined angle θ3 (for example, 45 °) in the opposite direction (upward direction) to And a third incident surface (lens surface) 13 that makes the light at ˜22.5 ° substantially parallel to the third axis X3.

  Referring to FIGS. 8 and 10, the emitting portion 4 includes a first lens cut portion 14 and a second lens cut portion 15.

  The first lens cut portion 14 has a first refracting surface 41 and a second refracting surface 42 that is a surface continuous with the first refracting surface 41 on the one direction (downward direction Y) side. The first total reflection surface 43 is provided on the opposite side (upward direction) to the one direction (lower direction Y), and the first refracting surface 41 is the second refracting surface 41. The incident surface (lens surface) 12 refracts the light substantially parallel to the second axis X2 and emits the light toward the one direction (downward direction Y), and the first total reflection. The surface 43 totally reflects the light made substantially parallel to the first axis X1 by the first incident surface (lens surface) 11 and directs it toward the second refracting surface 42. The refracting surface 42 refracts the light totally reflected by the first total reflection surface 43 and emits the light toward the one direction (downward direction Y). . The first refractive surface 41 has a predetermined cut angle θ4 with respect to the base surface B, and the second refractive surface 42 has a predetermined cut angle θ5 with respect to the base surface B, and The first total reflection surface 43 forms a predetermined cut angle θ6 with respect to the base surface B. 8 and 10, the cut angle θ4 is larger than the cut angle θ5. However, as will be described later, when the emission direction of the emitted light is changed to a desired one, the cut angle θ4 is It may be the same as the cut angle θ5 or smaller than the cut angle θ5.

  The second lens cut portion 15 includes a third refracting surface 44 on the one direction (downward direction Y) side, and is in a direction opposite to the one direction (downward direction Y) ( The second total reflection surface 45 is provided on the side of the upper direction), and the second total reflection surface 45 is substantially parallel to the third axis X3 on the third incident surface (lens surface) 13. The reflected light is totally reflected and directed to the third refracting surface 44. The third refracting surface 44 refracts the light totally reflected by the second total reflecting surface 45 and It emits to the side of the direction (downward direction Y). The third refracting surface 44 has a predetermined cut angle θ7 with respect to the base surface B, and the second total reflection surface 45 has a predetermined cut angle θ8 with respect to the base surface B. .

  In the light distribution control lens 2, the valley V formed between the first lens cut portion 14 and the second lens cut portion 15 is the first incident with respect to the base surface B. It is at a position higher than the surface (lens surface) 11.

  In the example of FIG. 8, the illumination light source (for example, LED light source) 1 includes first, second, and third incident surfaces (lens surfaces) 11, 12, and 13 of the incident portion 3 of the light distribution control lens 2. It is positioned at an approximately equal distance from. In the example of FIG. 8, the optical axis of the illumination light source (for example, LED light source) 1 is the same as the predetermined reference axis X1 of the light distribution control lens 2. In the following description, it is assumed that the optical axis of the illumination light source (for example, LED light source) 1 coincides with the predetermined reference axis X1 of the light distribution control lens 2.

  FIG. 11 shows an emission optical path when the emission part 4 of the light distribution control lens 2 is as shown in FIGS. As can be seen from FIG. 11, in the light distribution control lens 2, the second incident surface 12 is substantially parallel to the second axis X <b> 2 from the first refractive surface 41 of the first lens cut portion 14. The measured light is refracted and emitted at an angle φ1 with respect to the base surface B in the one direction (downward direction Y). Further, the light totally reflected by the first total reflection surface 43 is refracted from the second refracting surface 42 of the first lens cut portion 14 and is directed to the one direction (downward direction Y) side. The light exits at an angle φ2 with respect to the base surface B. Further, the light totally reflected by the second total reflection surface 45 is refracted from the third refracting surface 44 of the second lens cut portion 15 and is directed to the one direction (downward direction Y) side. The light exits at an angle φ3 with respect to the base surface B. In this way, from the respective refracting surfaces 41, 42, 44 of the emitting portion 4, the emitted lights of generally different angles φ1, φ2, φ3 are emitted to the one direction (downward direction Y), respectively. Therefore, it is possible to emit light (emitted light) having various angles in the downward direction Y (the downward irradiation range can be widened).

  As will be described later, the cut angles θ4, θ5, θ6, θ7, and θ8 of the first lens cut portion 14 and the second lens cut portion 15 of the emission portion 4 of the light distribution control lens 2 are appropriately set as follows. The angle can be changed to a desired angle, whereby the emission direction (irradiation direction) of the emitted light from the emission part 4 can be changed to a desired one. For example, in the above-described example, the light beams emitted from the respective refracting surfaces 41, 42, and 44 of the light emitting portion 4 are generally different in angles φ1, φ2, and φ3 from the one direction (downward direction Y), respectively. However, by appropriately changing the cut angles θ4, θ5, θ6, θ7, and θ8, the angles φ1, φ2, and φ3 of the emitted light can be arbitrarily set, and the angle φ1 , Φ2, φ3, for example, any two of them can be made the same.

  Referring to FIGS. 5 and 7 again, each of the six light distribution control lenses 2 (1), 2 (2), 2 (3), 2 (4), 2 (2) shown in FIGS. 5) The cut angles θ4, θ5, θ6, θ7, and θ8 of the first lens cut portion 14 and the second lens cut portion 15 of the exit portion 4 of 2 (6) are six light distribution control lenses, respectively. 2 (1), 2 (2), 2 (3), 2 (4), 2 (5), and 2 (6) are slightly different, for example, so that each of the six light distribution control The emission direction (irradiation direction) of the emitted light from the emission portions 4 of the lenses 2 (1), 2 (2), 2 (3), 2 (4), 2 (5), and 2 (6) is schematically shown in FIG. As shown (emission light D1, D2, D3, D4, D5, D6), it can be changed little by little to make it more diverse. Light (Emitted light) can be emitted (the irradiation range downward can be further widened). That is, in the examples of FIGS. 5 and 7, the light emitted from each of the six light distribution control lenses 2 (1), 2 (2), 2 (3), 2 (4), 2 (5), and 2 (6). Each of the cut angles θ4, θ5, θ6, θ7, and θ8 of the first lens cut portion 14 and the second lens cut portion 15 of the portion 4 is the light distribution control closest to the top surface 26b of the regular octagonal columnar support member 26. Light emitted from the lens 2 (1) for light irradiates the nearest region immediately below the support member 26, and is emitted from the light distribution control lens 2 (6) farthest from the top surface 26 b of the regular octagonal columnar support member 26. Irradiates an area farther away from the support member 26, and gradually irradiates an area farther away from the light distribution control lens 2 (1) toward the light distribution control lens 2 (6). ing. Further, the height of the lens 2 (from the light distribution control lens 2 (1) to the light distribution control lens 2 (6) is set so that the emitted light is not blocked by the adjacent light distribution control lens ( As shown in FIG. 8, the height H) in the direction of the predetermined reference axis X1 is gradually increased.

  3, 4, and 5, reference numeral 27 denotes a base for supplying current to each illumination light source (for example, LED light source) 1. Further, a drive circuit for supplying a current to each illumination light source (for example, LED light source) 1 is incorporated in, for example, the support member 26 (inside the support member 26 in which the inside is hollow). In addition, a cover plate 28 can be attached to the top surface 26b of the regular octagonal columnar support member 26, for example, as shown in a side view in FIG. FIG. 14 shows a plan view of the cover plate 28. In the examples of FIGS. 13 and 14, the cover plate 28 is composed of a regular octagonal flat plate member (a member such as an opaque acrylic resin).

  Referring to FIG. 3, the illumination lamp (street lamp) 50 irradiates the floor surface (or the ground, road surface, etc.) with the base 27 of the illumination device (illumination lamp) 21 described above. Alternatively, it is mounted on a socket 52 provided on a support column 51 that extends upward from the ground, road surface, etc., and whose tip is curved in a U-shape. Specifically, the base 27 of the lighting device 21 is mounted on the socket 52 (the lighting device 21 so that the substrate 22 is perpendicular to a horizontal plane (not shown) (that is, in the vertical direction). Is mounted vertically downward). In other words, the illumination device 21 is configured to be compatible with, for example, a mercury lamp having a base, for example, a light bulb having a light emitting unit such as a filament and a base.

  In addition, in the illuminating lamp (street lamp) 50 shown in FIG. 3, the tray part 53 is provided on the support column 51 of the illuminating lamp (street lamp) 50, and illumination is performed by the globe (outer lens) 54 attached to the dish part 53. The device 21 is covered. That is, in the configuration of FIG. 3, the top portion of the globe 54 is opposed to the top surface 26 b on the one direction (downward direction Y) side of the regular octagonal columnar support member 26 of the illumination device (illumination lamp) 21 described above. The globe 54 is attached so that 54b is located.

  In the illuminating lamp (street light) 50 having such a configuration, the substrate 22 is perpendicular to a horizontal plane (for example, a horizontal floor surface (or the ground, road surface, etc.)) (that is, in a vertical direction). The base 27 of the illuminating device 21 is mounted on the socket 52, and the light from the illuminating light source (for example, LED light source) 1 is shown in FIG. 11 and FIG. By controlling the light distribution in this way, for example, Patent Document 1 and Patent Document 2 do not increase the number of substrates (that is, an illumination light source (for example, an LED light source) whose optical axis is oriented horizontally). 1), it is possible to emit light (emitted light) having various angles in the downward direction Y, by simply attaching the substrate 22 for mounting 1 to the side surface 26a of the columnar support member 26. Irradiation The surroundings can be wide ranging from the near field (directly under the lighting lamp (street light) 50) to the far field, and the floor (or the ground, road surface, etc.) It is possible to efficiently irradiate a wide area from the vicinity immediately below) to a distant place.

  By the way, in the illuminating lamp (street lamp) 50 having the configuration of FIG. 3 using the illuminating device (illuminating lamp) 21 described above, the one direction of the regular octagonal columnar support member 26 of the illuminating device (illuminating lamp) 21 (for example, A small diameter made of a glove (for example, milky white PMMA (acrylic resin), milky white PC (polycarbonate resin), etc.) so that the top part 54b of the glove 54 is located facing the top surface 26b on the side in the lower direction Y). When the (globe) 54 is attached, the light from the light distribution control lens (for example, 2 (1)) does not reach the vicinity of the top 54b of the globe 54, as shown in FIG. There is a problem that the vicinity of the top 54b of the glove 54 becomes dark (a problem that the dark spot 55 is generated near the top 54b of the globe 54). Such a problem is not limited to the case of using the illumination lens (light distribution control lens) 2 described in the prior application (Japanese Patent Application No. 2011-6183) by the applicant of the present application, but other prior applications by the applicant of the present application. This also occurs when the illumination lens (light distribution control lens) described in Japanese Patent Application Nos. 2010-245573 and 2011-9502 is used. That is, such a problem occurs when a configuration in which an illumination light source (for example, an LED) and a light distribution control lens are arranged only on the side surface of a columnar support member is used. Below, for convenience of explanation, it is assumed that the above-described illumination lens (light distribution control lens) 2 described in the prior application (Japanese Patent Application No. 2011-6183) by the applicant of the present application is used.

  In the present invention, the substrate 22 for mounting the illumination light source (for example, the LED light source) 1 with the optical axis oriented horizontally without increasing the number of substrates (i.e., the regular octagonal column shape). ) Can be made to emit light having various angles in one direction (for example, the downward direction Y) (for example, a wide range of irradiation downward). Further, the top portion 54b of the globe 54 is positioned so as to face the top surface 26b of the columnar (for example, regular octagonal columnar) support member 26 on the one direction (for example, the downward direction Y) side. When a glove (for example, a glove having a small diameter made of milky white PMMA (acrylic resin) or milky white PC (polycarbonate resin)) 54 is attached, Part 54b dark spot 55 in the vicinity is intended to provide a possible lighting device and an illumination lamp that prevented.

  For this reason, the illumination device (illumination lamp) of the present invention has an illumination light source (for example, LED) and a light distribution control lens arranged only on the side surface of the columnar support member, and the light distribution control lens is an illumination light source. The light from (for example, LED) is directed to either the left or right direction with respect to a predetermined reference axis perpendicular to the central axis of the columnar support member, or with the upper or lower direction with respect to the predetermined reference axis. At least one for deflecting the emitted light from the light distribution control lens inwardly on the top surface in the one direction of the columnar support member. A lens means having a lens cut portion is arranged.

  In the following description, it is assumed that the one direction is the downward direction Y. The basic configuration of the illumination device (illumination lamp) will be described as that shown in FIGS.

  FIG. 16 is a diagram (sectional view) showing a configuration example of the illumination device (illumination lamp) of the present invention. The illuminating device (illuminating lamp) 71 in FIG. 16 is the same as the illuminating device (illuminating lamp) 21 shown in FIG. 5 in the top surface 26b on the side in the one direction (downward direction Y) of the regular octagonal columnar support member 26. And a lens means 72 having at least one lens cut portion for controlling the deflection of the light emitted from the light distribution control lens (for example, 2 (1)) (for example, D1) inward. It has become.

  Here, in the example of FIG. 16, the lens means 72 is formed of, for example, transparent PMMA (acrylic resin) or transparent PC (polycarbonate resin), and has four lens cut portions 73 a as at least one lens cut portion. 73b, 73c, 73d.

  In FIG. 17, the lens means 72 of FIG. 16 is shown in plan view. In FIG. 17, the outer contour of the top surface 26 b of the regular octagonal columnar support member 26 is indicated by a broken line. 16 and 17, the lens means 72 has a width (diameter) W1 wider (larger) than a width (diameter) W0 of the top surface 26b of the support member 26. Four lens cut portions 73a, 73b, 73c, and 73d are formed in a portion that protrudes from the top surface 26b.

  Here, in the example of FIGS. 16 and 17, the four lens cut portions 73a, 73b, 73c, and 73d of the lens means 72 are configured as concentric annular shapes. The four lens cut portions 73a, 73b, 73c, and 73d of the lens means 72 are configured as concentric circular rings, so that eight substrates 22 (that is, eight light distribution control lenses (for example, 2 (1 ))). That is, as will be described later, the four lens cut portions 73a, 73b, 73c, 73d of the lens means 72 are connected to the eight substrates 22 (that is, the eight light distribution control lenses (for example, 2 (1))). It can be configured to be divided into eight parts corresponding to each, but the four lens cut portions 73a, 73b, 73c, 73d of the lens means 72 are configured as concentric annular shapes, thereby processing, etc. Becomes easier.

  FIG. 18 is an enlarged cross-sectional view illustrating an example of four lens cut portions 73a, 73b, 73c, and 73d. In the example of FIG. 18, each of the lens cut portions 73a, 73b, 73c, and 73d is a refraction cut surface 74a that controls the deflection of the emitted light D1 from the light distribution control lens (for example, 2 (1)) inward. 74b, 74c, and 74d, respectively. Here, the cut angles ψ1, ψ2, ψ3, ψ4 of the refraction cut surfaces 74a, 74b, 74c, 74d of the lens cut portions 73a, 73b, 73c, 73d satisfy the condition that they are smaller than the critical angle ψc. In FIG. 18, 75a, 75b, 75c, and 75d are cut surfaces that are substantially parallel to the emitted light D1 from the light distribution control lens (for example, 2 (1)).

  In such a configuration, when the cut angles ψ1, ψ2, ψ3, ψ4 of the refractive cut surfaces 74a, 74b, 74c, 74d of the lens cut portions 73a, 73b, 73c, 73d are the same, for example, for light distribution control. The outgoing light D1 from the lens (for example, 2 (1)) is directed in the downward direction Y as shown in FIG. 19 by the refractive cut surfaces 74a, 74b, 74c, and 74d of the lens cut portions 73a, 73b, 73c, and 73d. Toward the inside (in the inward direction CC) and output with deflection controlled.

  As described above, light is emitted from the four lens cut portions 73a, 73b, 73c, 73d of the lens means 72 inward in the downward direction Y (inward direction CC), similarly to FIG. A glove (for example, milky white PMMA (acrylic resin), milky white PC (polycarbonate resin), etc.) having a small diameter so that the top part 54b of the glove 54 is located facing the top surface 26b of the regular octagonal columnar support member 26. Even when the illumination lamp (street light) 79 is constructed as shown in FIG. 20 by attaching the (globe) 54, the four lens cut portions 73a, 73b, 73c of the lens means 72 are located near the top 54b of the globe 54. , 73d can be prevented from being irradiated with the emitted light from the dark spots 73d.

  FIG. 21 shows the directional characteristics of an illumination lamp (street lamp) 79 having the configuration of FIG. 20 using the illumination device (illumination lamp) 71 of FIG. For comparison, FIG. 22 shows the directivity characteristics of the illumination lamp (street lamp) 50 having the configuration of FIG. 3 using the illumination device (illumination lamp) 21 of FIG. 21 and 22, the angle is an angle from the vertical downward direction to the vertical upward direction when the vertical downward direction is 0 °, the horizontal direction is 90 °, and the vertical upward direction is 180 °. It is.

  22, the illumination lamp (street lamp) 50 having the configuration of FIG. 3 using the illumination device (illumination lamp) 21 of FIG. 13 has an angle range of 0 ° to about 30 ° from the vertically downward direction to the vertically upward direction. It can be seen that irradiation with a predetermined illuminance is not performed. On the other hand, from FIG. 21, in the illuminating lamp (street lamp) 79 having the configuration of FIG. 20 using the illuminating device (illuminating lamp) 71 of FIG. It can be seen that irradiation with a predetermined illuminance has come to be performed in an angle range of 30 ° (particularly in an angle range of 0 ° to about 10 °). That is, from this directional characteristic, in the illuminating lamp (street lamp) 79 having the configuration of FIG. 20 using the illuminating device (illuminating lamp) 71 of FIG. 16, the illuminating device (illuminating lamp) 21 of FIG. It can be seen that the dark spot 55 generated near the top 54b of the globe 54 can be prevented in the illumination lamp (street lamp) 50 having the configuration.

  In the above example, the refraction cut surfaces 74a, 74b, 74c, and 74d of the lens cut portions 73a, 73b, 73c, and 73d have the same cut angles ψ1, ψ2, ψ3, and ψ4. If the outgoing light D1 from (for example, 2 (1)) can be emitted inward in the downward direction Y (inward), the refraction cut surfaces 74a, 74b, 74c, and 74d. The cut angles ψ1, ψ2, ψ3, and ψ4 need not be the same, and the cut angles ψ1, ψ2 of the refraction cut surfaces 74a, 74b, 74c, and 74d are appropriately set so that the light is emitted in a desired direction. , Ψ3, ψ4 can be set different from each other. For example, as shown in FIG. 23, the outgoing light D1 from the light distribution control lens (for example, 2 (1)) is deflection-controlled in the inward direction in the order of the lens cut portions 73a, 73b, 73c, and 73d. The cut angles ψ1, ψ2, ψ3, and ψ4 of the refraction cut surfaces 74a, 74b, 74c, and 74d can be set so as to be emitted.

  In the above example, the lens cut portions 73a, 73b, 73c, and 73d are composed of only the refraction cut surfaces 74a, 74b, 74c, and 74d. However, if necessary, for example, some lens cut portions may be totally reflected. The cut surface of the lens cut portions 73a, 73b, 73c, and 73d can also be used as a cut surface. The light D1 emitted from the light distribution control lens (for example, 2 (1)) is directed inward in the downward direction Y. Various modifications are possible as long as they can be emitted toward (inward direction).

  In the above-described example, the lens cut portions 73a, 73b, 73c, and 73d are configured as concentric circular rings. For example, as shown in the plan view of FIG. 73a, 73b, 73c, 73d may be divided into eight parts corresponding to each of the eight substrates 22 (that is, each of the eight light distribution control lenses (for example, 2 (1))). it can. Further, each of the lens cut portions 73a, 73b, 73c, 73d is, for example, as shown in a plan view in FIG. 25, eight substrates 22 (that is, eight light distribution control lenses (for example, 2 (1))). In correspondence with each of the above, it can be divided into eight parts and configured as a columnar shape.

  In the above-described example, the lens means 72 having at least one lens cut portion is disposed as a single unit on the top surface 26b of the support member 26. However, as shown in FIGS. (A) is a perspective view, FIG. 26 (b) is a cross-sectional view taken along the line EE of FIG. 26 (a), and a lighting device (illumination lamp) 71 is provided with a waterproof cover (see FIG. For example, a cover 77 made of transparent PMMA (acrylic resin), transparent PC (polycarbonate resin) or the like may be provided, and at least one lens cut portion 73 may be formed on the top 77 b of the waterproof cover 77. 26A and 26B, the lens means 72 having at least one lens cut portion 73 is formed integrally with the waterproof cover 77. In such a configuration, when the illumination device (illumination lamp) 71 is used in a place exposed to rain, such as a street light, a waterproof cover prevents entry of rain or the like into the illumination device (illumination lamp) 71. 77, and as described above, the dark spot 55 generated near the top 54b of the globe 54 in a street light or the like can be prevented.

  In the above example, the illumination lens (light distribution control lens) 2 described in the prior application (Japanese Patent Application No. 2011-6183) by the applicant of the present application is used. Even when the illumination lens (light distribution control lens) described in Japanese Patent Application Nos. 2010-245573 and 2011-9502 is used (that is, the illumination light source (for example, LED) only on the side surface of the columnar support member) Similarly, in the case of using a configuration in which a lens for controlling light distribution is used, by providing the lens means 72 on the top surface 26b of the support member 26, a dark spot is generated near the top 54b of the globe 54. Can be prevented.

  In each of the above-described examples, the regular octagonal columnar support member 26 is used and eight substrates are provided. As the support member 26, a regular n (n is an integer of 3 or more) rectangular columnar shape is used. It is possible to provide n substrates.

  In the above example, the one direction is the lower direction Y. However, when the one direction is, for example, the upper direction −Y, as shown in FIG. It is possible to prevent a dark spot from occurring near the top 54b of the globe 54, just as in the case where the one direction is the downward direction Y.

  In each of the above-described examples, the portion where the dark spot is generated is near the top portion 54b of the globe 54. However, the portion where the dark spot is generated is not limited to the vicinity of the top portion 54b of the globe 54. In the vicinity of the top surface 26 b of the support member 26. Further, the dark spot appears more prominently as the distance between the top surface 26b of the support member 26 and the portion of the globe 54 facing the dark surface is closer. In the present invention, by providing the lens means 72 on the top surface 26b of the support member 26, even when the distance between the top surface 26b of the support member 26 and the portion of the globe 54 opposite to the top surface 26b approaches, the support member of the globe 54. It is possible to prevent the occurrence of dark spots including the vicinity of the top surface 26b of 26.

  The present invention can be used for, for example, street lights, road lights, indoor lighting such as gymnasiums, indoor lighting, spotlights, and the like.

1 Light source for illumination (for example, LED light source)
2 Lighting lens (light distribution control lens)
3 entrance part 4 exit part 11 1st entrance plane (lens surface)
12 Second entrance surface (lens surface)
13 Third entrance surface (lens surface)
14 1st lens cut part 15 2nd lens cut part 41 1st refractive surface 42 2nd refractive surface 43 1st total reflection surface 44 3rd refractive surface 45 2nd total reflection surface 21, 71 Illumination Device 22 Substrate 26 Support member 26a Side surface 26b of support member 26 Top surface of support member 26 Base 50, 79 Illumination lamp (street light)
51 Prop 52 Socket 53 Dish 54 Glove (Outer Lens)
54b Top part of globe 54 72 Lens means 73a, 73b, 73c, 73d Lens cut part 77 Waterproof cover

Claims (1)

  An illumination light source and a light distribution control lens are disposed only on the side surface of the columnar support member, and the light distribution control lens transmits light from the illumination light source to a predetermined axis perpendicular to the central axis of the columnar support member. The columnar support member emits light in one of the left and right directions with respect to the reference axis, or the upper and lower directions with respect to the predetermined reference axis. On the top surface of the illuminating device, there is disposed an illuminating device having lens means having at least one lens cut portion for controlling the deflection of the light emitted from the light distribution control lens inward.

Images