JP2016024955A - Lens for illumination, and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance light utilization efficiency of a light-emitting element.SOLUTION: In a lens 33 for illumination, an incident surface 71 of a convex curve surface is provided on a bottom surface on the side of an emission surface 72, and light of an LED 51 as a light source made incident to the incident surface 71 is distributed in a first direction orthogonal to a direction of an optical axis K. On the bottom surface, a first reflection surface 75 reflecting light toward the emission surface 72 is provided at both sides holding the incident surface 71 in a second direction orthogonal to the direction of the optical axis K and the first direction.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an illumination lens and an illumination device.

  2. Description of the Related Art Conventionally, in a lighting device such as a security light installed on a power pole or an outer wall installed on a street, the lighting device includes a substrate on which a light emitting element is placed and a plate-like globe, and covers the globe by covering the globe. The globe is integrally provided with a convex lens portion at a position corresponding to the light emitting element, and the convex lens portion extends the light of the light emitting element in a direction perpendicular to the optical axis direction. Is known (for example, see Patent Document 1).

JP 2014-072106 A

  However, the conventional illumination lens has a problem that a part of the light incident on the globe from the light emitting element is deviated from the lens portion and is wasted.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an illumination lens and an illumination device that can improve the light use efficiency of a light-emitting element.

  In order to achieve the above object, according to the present invention, a curved incident surface convex toward the exit surface is provided on the bottom surface, and the light of the light source incident on the incident surface is arranged in a first direction orthogonal to the optical axis direction. In the illuminating lens for illuminating, a first surface that reflects light toward the exit surface on both sides of the entrance surface in the optical axis direction and a second direction orthogonal to the first direction is formed on the bottom surface. A reflection surface is provided.

  In the illumination lens according to the aspect of the invention, the exit surface may include an auxiliary exit surface on which light reflected by the first reflecting surface is incident and light is distributed in the second direction.

  In the illumination lens according to the present invention, the auxiliary emission surface reflects light directly incident from the incident surface to the bottom surface side.

  In the illumination lens according to the present invention, the first reflection surface and / or the auxiliary emission surface are total reflection surfaces.

  In the illumination lens according to the aspect of the invention, the incident surface may be provided between the first incident surface which is the convex curved surface and the edge of the first incident surface and between the first incident surface and the bottom surface. The first incident surface and the second incident surface both refract the light incident from the light source toward the optical axis.

  Further, the present invention includes a substrate provided with one or a plurality of light emitting elements serving as the light source, and a plate-like cover member that covers the substrate, and the substrate has a position corresponding to the light emitting element, Provided is an illuminating device provided with any one of the illumination lenses described above.

According to the present invention, the bottom surface of the lens is provided with a first reflecting surface that reflects light toward the exit surface on both sides of the entrance surface in the optical axis direction and the second direction orthogonal to the first direction. .
Thereby, in the cross section including the second direction, the light traveling away from the emission surface can be reflected by the first reflection surface and used for illumination, and the light use efficiency can be improved.

It is a figure which shows the installation aspect of the security light which concerns on embodiment of this invention. It is a figure which shows the structure of a security light, (A) is a downward perspective view, (B) is an upper perspective view. It is a top view of a security light. It is a figure which shows the structure of a security light, (A) is the IV-IV sectional view taken on the line of FIG. 3, (B) is the B section enlarged view of (A). It is a disassembled perspective view of a security light. It is a fragmentary sectional view which shows the fixation structure of wiring. It is a figure which shows the structure of a glove | globe, (A) is a bottom view, (B) is the VI-VI broken sectional view of (A). It is a perspective view of the lens provided in the glove. It is a three-view figure of the lens provided in the globe, (A) is a plan view of the lens, (B) is a side view of the side directed to the street direction of the lens, (C) is a side view of the side directed to the transverse direction of the lens It is a side view. It is sectional drawing of the lens provided in the globe, (A) is AA sectional drawing of FIG. 9 (A), (B) is BB sectional drawing of FIG. 9 (A). FIG. 10 is a ray diagram of a lens in a BB cross section in FIG. FIG. 10 is a light ray diagram of the lens in the AA cross section of FIG. It is a light ray figure at the time of forming the entrance plane virtually only with the 1st entrance plane in the section containing the 1st direction. It is explanatory drawing of the light control in a 1st entrance plane and a 2nd entrance plane. It is an illuminance distribution map of the security light provided with the lens. It is a disassembled perspective view which shows the structure of the crime prevention light of a modification.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a view showing an installation mode of the security light 1 according to the present embodiment.
As shown in FIG. 1, the crime prevention light 1 as a lighting device is attached to a column 9 that is erected on a street side 8 </ b> A of a street 8. The crime prevention light 1 is a lamp that illuminates a wide irradiation range in the street direction G, which is the direction (traffic direction) in which the street 8 extends, and the ambient brightness is below a predetermined value or / and during a predetermined time (so-called Lit at night). The security light 1 is designed so that the brightness of a specified vertical plane is obtained at a predetermined height (for example, 1.5 meters) from the road surface 8R of the street 8 in the entire irradiation range. Although not shown, the security light 1 may be attached to the wall surface using a bracket or the like in addition to being attached to the column 9. In the present embodiment, the upper and lower sides and the front and rear sides of the lamp are defined such that the irradiation side is the lower side and the attachment side is the rear side when the security light 1 is attached to the column 9.

2 and 3 are diagrams showing the configuration of the security light 1. 2A is an upper perspective view of the security light 1, and FIG. 2B is a lower perspective view of the security light. FIG. 3 is a plan view of the security light 1.
As shown in FIGS. 1 to 3, the security light 1 includes a lamp body 10 and a globe 30. The lamp body 10 includes a flat plate portion 11 and a support portion 12 that are formed in a thin flat plate shape having a predetermined thickness. The lamp body 10 is formed of a metal such as an aluminum alloy, and the flat plate portion 11 and the support portion 12 are integrally formed by casting. The lamp body 10 is not limited to a metal such as an aluminum alloy, but may be made of an insert resin in which a metal is placed in the core, and may be formed of other materials. The support portion 12 is provided on the top surface 10B of the lamp body 10, and supports the security light 1 on the support column 9 as shown in FIG. The support portion 12 is provided at a position close to the rear, which is the attachment side of the lamp body 10 to the column 9. The support portion 12 supports the security lamp 1 on the support column 9 in a posture in which the bottom surface 10A of the lamp body 10 on the irradiation surface side is inclined by about 20 ° with respect to the road surface 8R.
The bottom surface 10 </ b> A of the lamp body 10 is provided so as to cover a globe 30 as a cover member, and the bottom surface 10 </ b> A side is closed by the globe 30. The globe 30 is formed of a resin material or glass, and at least a part thereof has translucency. The globe 30 is formed in a plate shape having substantially the same size as the bottom surface 10 </ b> A of the lamp body 10.

As shown in FIGS. 2 and 3, the support portion 12 includes a support portion main body 13 and a bracket 14. The support body 13 is a hollow box, and the entire bottom 13B, which is the bottom surface, is connected to the top surface 10B of the lamp body 10, and the rear end 13C including the rear rear surface of the support body 13 includes A bracket 14 for fixing to the column 9 is attached.
The bracket 14 includes two plate-like members 14A and 14B facing each other. The plate-like members 14A and 14B are provided with a vertically long mounting hole 14C. The mounting hole 14C is provided at substantially the same position of the plate-like members 14A and 14B so as to penetrate the two plate-like members 14A and 14B. As shown in FIG. 1, the security light 1 is attached to the column 9 using an attachment band 7 passed through the attachment hole 14 </ b> C. Although illustration is abbreviate | omitted, the crime prevention light 1 may be attached by attaching the fixed bracket attached to the support | pillar 9 or the wall surface to the attachment hole 14C.

  The top surface 13 </ b> D of the support body 13 is provided with a daylighting opening 15 (lighting section) for allowing external light to enter the inside of the support body 13. A light-transmitting sensor cover 17 (transparent body) is inserted into the daylighting opening 15. The daylighting opening 15 is liquid-tightly sealed by the sensor cover 17. The sensor cover 17 is formed from a material such as silicon rubber. The sensor cover 17 is elastically deformed by being pushed into the daylighting opening 15 from the outside of the top surface 13D, and is detachably inserted. The sensor cover 17 has translucency so that a brightness sensor 65 (light sensor), which will be described later, can detect the brightness of the surrounding environment based on light that enters the support body 13 through the sensor cover 17. The material may be transparent or milky white. Further, the sensor cover 17 is not limited to a configuration formed of an elastic body, and may be a configuration formed of an inelastic body such as a resin material and fixed to the top surface 13D by screwing.

4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is an exploded perspective view of the security light 1.
As shown in FIGS. 4 and 5, the security light 1 includes a substrate 50 in addition to the lamp body 10 and the globe 30.
The flat plate portion 11 of the lamp body 10 includes a substrate attachment surface 20 for attaching the substrate 50 to the bottom surface thereof. The upper surface of the flat plate portion 11 constitutes the top surface 10B of the lamp body 10, and the above-described support portion body 13 is integrally formed on the upper surface.
An opening 22 penetrating the top surface 10B is formed in the substrate mounting surface 20 of the flat plate portion 11, and the hollow interior of the support portion main body 13 of the top surface 10B communicates with this through the opening. The hollow interior of the main body 13 is provided as a recess 18 (storage recess).

The board 50 is a substantially rectangular circuit mounting board. For example, a current-carrying part (not shown) is made of a highly heat conductive copper foil, and the other insulating parts (not shown) are made of a resin board. Yes. The substrate 50 is a substrate whose both surfaces are mounting surfaces. A plurality of LEDs 51 that are light emitting elements are mounted on the substrate 50. LED51 is LED with a lens in this embodiment. The plurality of LEDs 51 are mounted on the surface 50A of the substrate 50 (the surface on the irradiation side of the security light 1 in the substrate 50). In the present embodiment, the LED is provided as a light source, but another light emitting element such as an organic EL may be provided as the light source.
A plurality of power supply components 61 constituting the power supply circuit 60 are mounted on the back surface 50B of the substrate 50. The power supply component 61 is an electronic component such as a power supply semiconductor element. As described above, in the substrate 50 of the present embodiment, the plurality of LEDs 51 and the plurality of power supply components 61 are arranged on one substrate.

As shown in FIG. 5, the plurality of power supply components 61 are arranged on the substrate 50 at positions shifted laterally from the positions where the LEDs 51 are arranged. In the present embodiment, in the installation state of the security light 1, the mounting surface of the board 50 is defined as an area on the front side of the front surface 50A as a light source area, and an area on the rear side of the back surface 50B and the front surface 50A as a power circuit area. It is prescribed. The plurality of LEDs 51 are arranged in the light source area, and the plurality of power supply components 61 are arranged together in the power supply circuit area. That is, when the security light 1 is viewed from the side, a plurality of LEDs 51 are collectively arranged on the front side of the substrate 50, and a plurality of power supply components 61 are collectively arranged on the rear side shifted laterally from these LEDs 51.
As shown in FIG. 4, each power supply component 61 has an attachment lead 68 (attachment leg), and the lead 68 is attached by being inserted into a hole provided in advance in the substrate 50. The leads 68 are wired while being soldered to the surface 50 </ b> A of the substrate 50. Among the plurality of power supply components 61, components that are taller than the leads 68 are arranged on the back surface 50 </ b> B of the substrate 50. That is, most of the power supply components 61 are arranged on the substrate 50 so as to protrude from the surface (back surface 50B) opposite to the surface (front surface 50A) on which the LEDs 51 are mounted. Among the plurality of power supply components 61, the electronic component 61 </ b> A that is substantially the same height as the lead 68 or short may be arranged on the surface 50 </ b> A of the substrate 50 on which the LEDs 51 are arranged. In short, the plurality of LEDs 51 and the plurality of power supply components 61 are arranged on a single substrate 50, and the LEDs 51 and the power supply components 61 are shifted laterally, and the front and back surfaces of the substrate 50 are arranged. It is divided and arranged. In the substrate 50, a portion where the LED 51 is attached is referred to as an LED attachment portion 50C, and a power supply component attachment portion 50D where the power supply component 61 is attached. The LED attachment portion 50C and the power supply component attachment portion 50D are disposed on the substrate 50 at positions that do not overlap each other. A lead 68, solder 68A, and a short electronic component 61A protrude from the surface 50A of the substrate 50 in the power supply component mounting portion 50D.

The power circuit 60 is a power circuit that converts commercial power into DC power and generates lighting power for the LED 51. Commercial power is supplied to the power supply circuit 60 through an electric wire 62 drawn from the rear end portion 13 </ b> C of the support portion main body 13. The rear end portion 13C of the support portion main body 13 is provided with an electric wire hole 63 for drawing out the electric wire 62. An electric wire cover 64 is detachably inserted into the electric wire hole 63. The electric wire 62 is drawn into the support body 13 from the electric wire hole 63 in a liquid-tight manner by the electric wire cover 64.
A brightness sensor 65 is connected to the power supply circuit 60. The brightness sensor 65 is disposed on the back surface 50 </ b> B of the substrate 50 together with the plurality of power supply components 61. The brightness sensor 65 is an illuminance sensor constituted by a potting type phototransistor. The brightness sensor 65 is provided at a position corresponding to the sensor cover 17 described above. The brightness sensor 65 is disposed on the substrate 50 so that the sensor head, in which the light receiving element is potted and sealed, fits in the sensor cover 17 particularly when the substrate 50 is attached to the lamp body 10.

  The brightness sensor 65 detects the brightness around the security light 1 on the basis of external light that has entered the lamp body 10 from the lighting opening 15 via the sensor cover 17. The power supply circuit 60 is provided with a lighting circuit for controlling the power supply circuit 60 according to the brightness around the crime prevention light 1 based on the detection signal of the brightness sensor 65 and turning on / off. Lighting control is performed. In this embodiment, the daylighting opening 15 is provided on the top surface of the recess 18. However, the present invention is not limited to this, and the wall surface of the recess 18 is appropriately arranged so that external light can enter the recess 18. You may provide in the position.

As shown in FIG. 5, the board mounting surface 20 is configured to be approximately the same size as or slightly larger than the board 50. At least a part of the substrate mounting surface 20 is configured as a heat transfer surface 21 to which the back surface 50B of the substrate 50 is in close contact and the heat of the LED 51 is transmitted. The heat transfer surface 21 is provided at a position corresponding to the LED attachment portion 50 </ b> C in which the LEDs 51 are arranged on the surface 50 </ b> A of the substrate 50. In the back surface 50B of the substrate 50, a heat conductive film is provided in a region corresponding to the LED mounting portion 50C, although illustration is omitted. A heat conductive film is provided in the back surface 50B over the range which covers the whole mounting area | region of LED51 mounted in the surface 50A. The substrate 50 is attached to the substrate mounting surface 20 with the region of the back surface 50 </ b> B where the heat conductive film is provided in close contact with the heat transfer surface 21. As a result, the LED mounting portion 50C of the substrate 50 is brought into contact with the substrate mounting surface 20 so as to be able to conduct heat.
The lamp body 10 is formed of a material having high thermal conductivity such as an aluminum alloy as described above, and the heat generated by the LED 51 is transmitted from the back surface 50B of the substrate 50 to the heat transfer surface 21 of the lamp body 10 through the heat conductive film. Then, heat is radiated from the substantially entire surface of the lamp body 10 in contact with the outside air to the outside air.

  The substrate attachment surface 20 is formed with the opening 22 at a position shifted laterally from the heat transfer surface 21, and the bottom surface side of the flat plate portion 11 communicates with the hollow interior of the support body 13 through the opening 22. The size of the opening 22 is configured to be substantially the same as or slightly smaller than the bottom 13 </ b> B of the support body 13. The substrate 50 is mounted on the substrate mounting surface 20 while accommodating the plurality of power supply components 61 and the brightness sensor 65 mounted on the back surface 50B in the recess 18 and covering the opening 22.

As shown in FIG. 5, positioning pins 23 that determine the mounting position of the substrate 50 are provided on the substrate mounting surface 20. The positioning pin 23 is a rod-shaped member that protrudes from the board mounting surface 20 in the optical axis direction of the LED 51. The board mounting surface 20 is provided with positioning pins 23 at three locations so that the board 50 can be accurately positioned with respect to the board mounting surface 20.
The substrate 50 is provided with positioning holes 52 at positions corresponding to the positioning pins 23. The board 50 and the board mounting surface 20 are provided with screw holes 54 and screw holes 24 at positions corresponding to each other. The substrate 50 is positioned and attached to the substrate mounting surface 20 by inserting the positioning pins 23 through the positioning holes 52 and screwed to the substrate mounting surface 20 with screws 53. When the substrate 50 is attached to the substrate attachment surface 20, a part of the back surface 50B is in close contact with the heat transfer surface 21, and the power supply component 61 and the brightness sensor 65 disposed on the back surface 50B are recessed. 18.

  FIG. 6 is a partial cross-sectional view showing a structure for fixing the wiring in the recess 18. In FIG. 6, components mounted on the substrate 50 such as the power supply component 61 are omitted in order to clearly show the wiring fixing structure. As shown in FIG. 6, the electric wire 62 is drawn into the concave portion 18 through the electric wire hole 63 provided in the rear end portion 13 </ b> C of the support portion main body 13. An electric wire holder 25 is provided inside the recess 18. The electric wire holder 25 protrudes from the top surface 13 </ b> D of the support body 13 toward the hollow interior. The electric wire holder 25 is formed integrally with the lamp body 10. In addition, the electric wire holder 25 may be formed separately from the lamp body 10 and attached to the top surface 13D from the inside of the recess 18. The electric wire holder 25 includes an insertion hole 25B through which a binding band 25C such as a cable tie is inserted. The electric wire 62 drawn into the recess 18 is bound by the binding band 25C inserted through the insertion hole 25B and held by the electric wire holder 25.

  A wire-side connector 66 is provided at the connection end of the wire 62. A board-side connector 55 to which the electric wire 62 is connected is provided on the back surface 50B of the board 50. The board-side connector 55 is provided at a position where the electric wire 62 can be wired inside the recess 18 while avoiding the power supply component 61 and the brightness sensor 65. The board-side connector 55 is provided at a position where the power supply component 61 and the brightness sensor 65 can be easily accommodated inside the recess 18 after the wire-side connector 66 is connected to the board-side connector 55 during the assembly process. It is done. In the present embodiment, the board-side connector 55 is provided at a position where the electric wire 62 drawn into the recess 18 through the electric wire hole 63 is connected through the periphery of the brightness sensor 65. Further, the electric wire 62 is drawn into the recess 18 from the electric wire hole 63 through the periphery of the brightness sensor 65 to a length sufficient to be connected to the board-side connector 55. A stopper 67 is attached to the electric wire 62 to prevent the electric wire 62 having a predetermined length drawn into the concave portion 18 from being drawn out of the concave portion 18. The stopper 67 may be a binding band such as a cable tie.

  A wall 26 (rib) is provided on the edge of the daylighting opening 15 into which the sensor cover 17 is inserted, at a predetermined distance from the daylighting opening 15 along the edge. The wall 26 is configured in a C shape in plan view with the rear side of the support body 13 cut away. The wall 26 is formed at substantially the same height as the protruding height of the sensor cover 17 from the top surface 13D of the support body 13. The wall 26 is disposed at a distance from the daylighting opening 15 such that a bird's mouth and claws are difficult to enter between the sensor cover 17 and the wall 26. As described above, since the wall 26 is provided along the eyelid of the daylighting opening 15 into which the sensor cover 17 is inserted, the sensor cover 17 can be prevented from being taken or damaged by birds. In addition, since the lamp body 10 is attached with the bottom surface 10A inclined by about 20 ° with respect to the road surface 8R, the top surface 13D of the support body 13 provided with the wall 26 is also the same as the bottom surface 10A of the lamp body 10. It inclines with respect to the road surface 8R in the direction of. Since the wall 26 has a C-shape in plan view with the lower side of the slope cut off, water drops such as raindrops generated between the wall 26 and the sensor cover 17 can be efficiently discharged from the cutout portion. Can do.

  The globe 30 covers and closes the bottom surface 10 </ b> A side of the lamp body 10. As shown in FIG. 5, the globe 30 is formed in a plate shape having substantially the same size as the bottom surface 10 </ b> A of the lamp body 10. The globe 30 includes a pair of claws 36 on the left and right edges. A pair of hook holes 28 are formed in the lamp body 10 at positions corresponding to the claws 36. The globe 30 is attached by covering the bottom surface 10 </ b> A of the lamp body 10 by hooking the claw 36 from the inside of the lamp body 10 to the hooking hole 28. Further, the globe 30 is provided with a notch 38 with an outer peripheral ridge cut out at the front and rear end portions, and is screwed to the bottom surface 10 </ b> A of the lamp body 10 by a screw 40 inserted through the notch 38.

An annular packing insertion groove 29 is provided on the bottom surface 10 </ b> A of the lamp body 10 so as to surround the substrate mounting surface 20. An annular water-stopping packing 19 is fitted into the packing fitting groove 29.
FIG. 7 is a diagram illustrating a configuration of the globe 30. As shown in FIG. 7, the globe 30 is provided with an annular packing pressing rib 37 on the back surface 30 </ b> B that is the surface facing the bottom surface 10 </ b> A of the lamp body 10. The packing pressing rib 37 is provided at a position corresponding to the packing insertion groove 29 and is inserted into the packing insertion groove 29 when the globe 30 is attached to the lamp body 10. When the globe 30 is attached to the lamp body 10, the packing 19 fitted in the packing insertion groove 29 is pressed by the packing pressing rib 37, and the packing pressing rib 37 and the packing 19 are in close contact with each other. As a result, the waterproofing packing 19 can be sandwiched between the lamp body 10 and the globe 30 to waterproof the board mounting surface 20.

  The above-described hook hole 28 is disposed outside the packing insertion groove 29. Since the hooking hole 28 penetrates the front and back of the flat plate portion 11, there is a possibility that water may enter the lamp body 10 from the hooking hole 28. Accordingly, as shown in FIG. 5, the rear side surface 11 </ b> B of the flat plate portion 11 is provided with a drain hole 27 at the rear end portion. The drain hole 27 is formed in the rear side surface 11B by cutting out the bottom surface 10A. When the lamp body 10 is used, the flat plate portion 11 is inclined with respect to the road surface 8R in the same direction as the bottom surface 10A of the lamp body 10. The water that has entered the interior of the lamp body 10 from the catching hole 28 travels between the packing pressing rib 37 of the globe 30 and the inner surface of the flat plate portion 11 along the back surface 30B of the globe 30, and the rear of the lamp body 10. It flows toward the end and is discharged from the drain hole 27 to the outside.

As shown in FIG. 5, the globe 30 integrally covers the LED attachment portion 50 </ b> C and the power supply component attachment portion 50 </ b> D of the substrate 50. The globe 30 is divided into a light source corresponding portion 30C (corresponding portion) corresponding to the LED mounting portion 50C of the substrate 50 and a power supply corresponding portion 30D (corresponding portion) corresponding to the power supply component attaching portion 50D of the substrate 50.
The power supply corresponding part 30D of the globe 30 is formed one step higher on the surface 30A side than the light source corresponding part 30C. The power supply corresponding part 30D is formed one step higher on the front surface 30A side, so that the inside (back surface 30B side) thereof is expanded in the height direction by one step. The globe 30 only needs to have a configuration in which the inside of the power supply corresponding part 30D is expanded, and the power supply corresponding part 30D does not necessarily have to be formed in a staircase shape. For example, the power supply corresponding part 30D of the globe 30 may bulge to the surface 30A side than the light source corresponding part 30C.

  On the surface 50A of the substrate 50, a lead 68 and solder 68A of the power supply component 61 and an electronic component 61A that is substantially the same height as the lead 68 or shorter than the lead 68 are projected from the power supply component mounting portion 50D. The The power supply component mounting portion 50D of the substrate 50 is covered with the power supply corresponding portion 30D. The leads 68, the solder 68A, and the electronic component 61A that protrude from the surface 50A of the substrate 50 are accommodated in an interior that is expanded in the height direction by one step in the power supply corresponding portion 30D. Accordingly, the globe 30 can be attached to the lamp body 10 without buffering the leads 68, the solder 68A, and the electronic component 61A protruding from the surface 50A of the substrate 50.

  As shown in FIG. 7, on the back surface 30 </ b> B of the globe 30, a substrate pressing rib 38 (rib) is provided in the light source corresponding part 30 </ b> C. The board pressing rib 38 presses the LED mounting portion 50 </ b> C of the board 50 against the heat transfer surface 21 with the globe 30 attached to the lamp body 10. The board pressing ribs 38 are arranged inside the packing pressing ribs 37 so as to surround all the LEDs 51. The substrate pressing rib 38 is composed of a pair of substantially rib-shaped pressing ribs in plan view provided on the left and right sides of the light source corresponding part 30C. The plurality of substrate pressing ribs 38 may be provided so as to surround the LEDs 51 one by one, or the LEDs 51 may be provided so as to surround the LEDs 51 for each group by dividing the LEDs 51 into a plurality of groups. According to this configuration, in a state where the globe 30 is attached to the lamp body 10, the LED attachment portion 50 </ b> C of the substrate 50 is pressed against and closely adhered to the heat transfer surface 21, so that the heat of the LED 51 is efficiently applied to the lamp body 10. Heat can be transferred to dissipate heat.

  In addition, the globe 30 is subjected to a boring process in a range surrounding all the LEDs 51 of the entire power supply corresponding unit 30D and the light source corresponding unit 30C. The light source corresponding part 30 </ b> C is subjected to a boring process on the substrate pressing rib 38 and a region outside the substrate pressing rib 38. In this way, by applying a warping process to the globe 30, it is possible to prevent the mounting legs and the power supply components of the power supply component 61 protruding from the back surface 50 </ b> B of the substrate 50 from being seen by passers-by passing through the street 8.

  Further, a vent hole 34 is provided inside the packing pressing rib 37 at the rear end portion of the globe 30. A filter 35 is attached to the vent hole 34. Since the bottom surface 10 </ b> A of the lamp body 10 is closed with the globe 30, the air in the security light 1 may expand due to heat generated by the LED 51. Since the ventilation hole 34 is provided in the globe 30, the air expanded in the security light 1 can escape to the outside of the security light 1. In addition, since the filter 35 is provided in the vent hole 34, foreign matter such as dust and insects can be prevented from entering the crime prevention light 1 from the vent hole 34. Furthermore, since the ventilation hole 34 is provided in the globe 30, the internal air of the globe 30 can be circulated, and condensation can be prevented from occurring in the globe 30.

The globe 30 is integrally provided with an illumination lens 33 as an optical element at a position corresponding to each of the LEDs 51. Each illumination lens 33 is an optical member that controls the light distribution of the irradiation light. By providing the illumination lens 33 integrally with the globe 30, the gap between the substrate 50 and the globe 30 can be reduced and the security light 1 can be made thin.
A specific configuration of the illumination lens 33 will be described later.

Here, since the illumination lens 33 controls the light distribution of the irradiation light, the LED 51 and the illumination lens 33 need to be arranged in a predetermined positional relationship with high accuracy. Each of the LED 51 and the illumination lens 33 has an optical reference point position serving as a reference position for optical design. The optical reference point position of the LED 51 is the optical axis of the light emission point, and the light emission reference point position of the illumination lens 33 is the optical center.
The substrate 50 and the globe 30 are accurately positioned at a position where the optical reference point position of the LED 51 matches the optical reference point position of the illumination lens 33. As described above, the board 50 is positioned with respect to the board mounting surface 20 by the positioning pins 23 and the screw holes 24 and attached to the lamp body 10. The globe 30 includes a receiving groove 41 that receives the positioning pin 23 at a position corresponding to the positioning pin 23 provided on the board mounting surface 20. The receiving groove 41 is formed by denting the back surface 30B of the globe 30 and expanding it to the front surface 30A. In the globe 30, the positioning pin 23 is inserted into the receiving groove 41, the packing pressing rib 37 formed in a frame shape is inserted into the packing fitting groove 29, and the pair of claws 36 are inserted into the pair of hooking holes 28 of the lamp body 10. It is hooked and positioned with respect to the lamp body 10. As described above, the substrate 50 and the globe 30 are positioned with respect to the lamp body 10, so that the optical reference point position of the LED 51 coincides with the optical reference point position of the illumination lens 33. It is configured to be well positioned.
The globe 30 is provided with a relief groove 42 that escapes the head of the screw 53 at a position corresponding to the screw 53 that screws the substrate 50 onto the substrate mounting surface 20. The escape groove 42 is formed by denting the back surface 30B of the globe 30 and expanding it to the front surface 30A.

Next, the configuration of the illumination lens 33 will be described in detail.
FIG. 8 is a perspective view of the illumination lens 33 provided on the globe 30. 9A and 9B are three views of the illumination lens 33 provided on the globe 30, FIG. 9A is a plan view of the illumination lens 33, and FIG. 9B is a side of the illumination lens 33 directed in the street direction G. FIG. FIG. 9C is a side view of the side facing the transverse direction W of the illumination lens 33. 10 is a cross-sectional view of the illumination lens 33 provided on the globe 30. FIG. 10A is a cross-sectional view taken along the line AA of FIG. 9A, and FIG. 10B is a cross-sectional view of FIG. It is -B sectional drawing.
As shown in FIG. 2, the illumination lens 33 is integrally provided on the surface 30 </ b> A of the globe 30 at a position corresponding to each of a plurality (five in the illustrated example) of LEDs 51.
Each of the illumination lenses 33 is a convex lens having the same shape, distributes the light of the LED 51 to the road surface 8R of the street 8, and illuminates the irradiation area of the road surface 8R. The light distribution of the illumination lens 33 is a so-called laterally long light distribution that irradiates an irradiation region that is longer in the street direction G than in the transverse direction W (FIG. 1). The crossing direction W is a direction crossing the street 8 and orthogonal to the street direction G.

  As shown in FIG. 10, the back surface 30 </ b> B of the globe 30 corresponds to the bottom surface of the illumination lens 33 (the surface facing the opposite side of the emission surface 72 outside the incident surface 71). A concave portion 70 in which the LED 51 is disposed is formed on the back surface 30 </ b> B immediately below the illumination lens 33. The LED 51 is a so-called LED with a lens, and a bullet-type lens 51B is provided on the light emitting surface 51A1 of the LED chip 51A. The concave lens 70 accommodates a bullet-type lens 51B of the LED 51, and the light emitting surface 51A1 of the LED chip 51A is disposed flush with the opening surface 70A of the concave portion 70 (that is, the back surface 30B of the globe 30).

In the LED 51, the center of the light emitting surface 51A1 is set as the light emitting point Q, and light is emitted with the optical axis K being an axis extending from the light emitting point Q in the normal direction of the light emitting surface 51A1. The light distribution of the LED 51 is a so-called Lambert light distribution in which the luminous intensity distribution is proportional to cos α when the emission point Q is a reference and the angle from the optical axis K is α. Light is emitted from the light emitting point Q over a wide range extending in a direction orthogonal to the optical axis K.
By arranging the LED 51 so that the light emitting point Q is aligned with the opening surface 70A of the concave portion 70, light radiated from the light emitting point Q in a wide range is incident on substantially the entire surface of the concave portion 70. Is the incident surface 71 provided on the bottom surface of the illumination lens 33 (the back surface 30B of the globe 30).
The configuration of the incident surface 71 will be described later.

The illumination lens 33 has an exit surface 72 provided in a convex shape on the surface 30 </ b> A of the globe 30, and light incident from the entrance surface 71 has a first direction perpendicular to the optical axis K from substantially the entire exit surface 72. The optical axis K and the second direction orthogonal to the first direction are extended and emitted. The light distribution of the illumination lens 33 is a so-called horizontally long light distribution that expands light in the first direction more than in the second direction.
The illumination lens 33 is provided in the globe 30 so that the first direction faces the street direction G and the second direction faces the transverse direction W in the state where the illumination lens 33 is incorporated in the crime prevention light 1. 1 light distribution is a horizontally long light distribution in which the road surface 8R of the street 8 is irradiated horizontally.

As shown in FIGS. 8 and 9, the exit surface 72 of the illumination lens 33 includes a main exit surface 73 and an auxiliary exit surface 74 when roughly classified.
The main exit surface 73 emits light in each of the second direction and the first direction so as to form the horizontally long light distribution extending in the first direction (street direction G) than in the second direction (crossing direction W). Is a light control surface that includes a first emission surface 73A and a second emission surface 73B.
The first emission surface 73A is a light control surface that expands light mainly in the street direction G.
As shown in FIG. 8, the first emission surface 73A has a substantially elliptical shape in plan view, and the optical axis K of the LED 51 is arranged at the center. A third exit surface 73A1 that is a curved surface having a larger curvature than its periphery is provided at the center of the first exit surface 73A, that is, at a location that intersects the optical axis K. This third exit surface 73A1 extends the light larger than the surrounding first exit surface 73A, so that the light flux toward the optical axis K is distributed to the periphery, and the illuminance near the optical axis K is excessively increased. Is preventing.

  The second emission surface 73B is a curved surface that is provided continuously on both sides in the second direction (transverse direction W) with the first emission surface 73A in between, and is mainly provided across the first emission surface 73A. Extend light in direction W.

  The curvature and shape of each of the first exit surface 73A, the second exit surface 73B, and the third exit surface 73A1 of the main exit surface 73 are the installation position of the security light 1, and the street direction G of the irradiation area on the road surface 8R, and Each length is defined by the length in the transverse direction W, and can be changed according to light control on the incident surface 71 described later.

FIG. 11 is a ray diagram of the illumination lens 33 in the BB cross section of FIG. This BB cross section corresponds to a cross section including the optical axis K and the second direction (transverse direction W), and this ray diagram shows light control in the second direction (transverse direction W).
The auxiliary exit surface 74 is a light control surface that directs light deviating from the main exit surface 73 out of the light incident on the entrance surface 71 to the irradiation region of the road surface 8R.
Specifically, as shown in FIG. 11, the first reflecting surfaces 75 are provided on both sides of the incident surface 71 on the bottom surface of the illumination lens 33 (that is, the back surface 30 </ b> B of the globe 30). The first reflecting surface 75 emits the light beam M1 emitted from the light emitting point Q of the LED 51 and incident on the incident surface 71, and traveling through the globe 30 while deviating from the emission surface 72 of the illumination lens 33. Total reflection is performed toward the auxiliary emission surface 74 of the surface 72. This light beam M1 is incident on the auxiliary exit surface 74 and directed to the irradiation area irradiated by the main exit surface 73.
Thereby, since the light flux M1 that travels through the globe 30 and is wasted is used for irradiation of the irradiation region, the light use efficiency is improved.

  The first reflecting surface 75 is formed by providing a recess having a triangular cross section on the back surface 30B of the globe 30 and an inclined surface of the recess. Although not shown in the drawing, the depression of the cross-sectional triangle constituting the first reflecting surface 75 is provided over at least the length N (FIG. 12) of the incident surface 71 in the street direction G, and the above-described occurrence at the incident surface 71. Most of the light beam M <b> 1 is reflected toward the auxiliary emission surface 74. The inclination angle of the first reflecting surface 75 and the height in the direction from the back surface 30B to the front surface 30A are determined by the relationship with other light control surfaces such as the entrance surface 71 and the main exit surface 73.

The auxiliary emission surface 74 is provided for each of the first reflection surfaces 75, and is connected to the edge 73F of the main emission surface 73 as shown in FIG. 9 immediately above the first reflection surface 75 as shown in FIG. The main exit surface 73 is provided with a length substantially the same as the length in the first direction (street direction G).
Each auxiliary emission surface 74 is optically controlled with respect to the light beam M1 so that each emission light crosses in the second direction (transverse direction W) and illuminates the end of the irradiation region in the second direction (transverse direction W). . Thereby, the illuminance at the end of the irradiation region in the transverse direction W is supplemented by the light flux M1, and the irradiation region in the transverse direction W can be expanded.

Since the auxiliary emission surface 74 is designed based on the relationship with the first reflection surface 75, the light control is not accurate with respect to light other than the light that is reflected from the first reflection surface 75 and is incident, so-called. Light leaks.
Therefore, as shown in FIG. 11, the auxiliary emission surface 74 uses, for illumination, a light beam M2 that is incident on the incident surface 71 and is directly reflected on the auxiliary emission surface 74 without being reflected by the first reflecting surface 75. Reflected by total reflection on the bottom surface side of the lens 33 (that is, the back surface 30B side of the globe 30).
Thereby, leakage light is prevented from being emitted from the auxiliary emission surface 74, and the deterioration of the light distribution quality by the illumination lens 33 is suppressed.

FIG. 12 is a ray diagram of the illumination lens 33 in the AA cross section of FIG. This AA cross section corresponds to a cross section including the optical axis K and the first direction (street direction G), and this ray diagram shows light control in the first direction (street direction G).
The main emission surface 73 of the illumination lens 33 is formed in an elliptical shape in plan view extending in the first direction (street direction G), and as shown in FIG. 12, the first direction is the end in the first direction. The light emitted from the end 73T is directed far away in the first direction.
Therefore, when the auxiliary emission surface 74 for preventing leakage light is provided at both ends in the first direction of the main emission surface 73 in place of the first direction end portion 73T, at both ends of the irradiation region in the first direction. Although the illuminance is compensated, since the first direction end portion 73T is not provided, the length of the irradiation region in the first direction is shortened as it is.

Therefore, the illumination lens 33 is configured to effectively use the leaked light in the first direction by controlling the light incident surface 71, and this configuration will be described below.
That is, as shown in FIG. 12, the incident surface 71 of the illumination lens 33 includes a first incident surface 80 and a second incident surface 81 in a section including the first direction (street direction G). The shape extends in the transverse direction W.
The first incident surface 80 is a curved surface convex toward the main exit surface 73, is orthogonal to the optical axis K at a portion intersecting with the optical axis K, and directs light incident from the light emitting point Q toward the main exit surface 73. The illumination lens 33 is formed in an aspheric shape in a cross section including the first direction.

  The second incident surface 81 is an incident surface connected to the edge 80A of the first incident surface 80 and provided between the first incident surface 80 and the bottom surface of the illumination lens 33 (that is, the back surface 30B of the globe 30). In the illumination lens 33, light is incident on substantially the entire surface of the concave portion 70 constituting the incident surface 71. Therefore, the incident surface 71 controls all of the incident light in the cross section including the first direction. Therefore, the second incident surface 81 is provided so as to extend to the bottom surface of the illumination lens 33.

FIG. 13 is a ray diagram when the incident surface 71 is virtually formed of only the first incident surface 80 in the cross section including the first direction.
As shown in this figure, when the incident surface 71 is formed only by the first incident surface 80, a part of the light beam M3 incident on the incident surface 71 is deviated from the main exit surface 73, and this light beam. M3 is wasted.
Therefore, in the illumination lens 33, the second incident surface 81 is provided in the range S where the light beam M3 is incident on the incident surface 71, and light control is performed so that the second incident surface 81 directs the light beam M3 toward the main exit surface 73. doing.
In the illumination lens 33, the second incident surface 81 is formed into a spherical surface having a predetermined radius from the light emitting point Q, and the incident light is refracted toward the optical axis K as shown in FIG. The light is controlled so as to be incident. In the illumination lens 33, the second incident surface 81 causes the light beam M <b> 3 to be incident on the first direction end portion 73 </ b> T of the main exit surface 73. As a result, the light beam M3 is directed to the far side in the first direction (street direction G) by the first direction end 73T, and the far side is efficiently irradiated.

Here, in the illumination lens 33, as shown in FIG. 14, the first incident surface 80 also has incident light on the optical axis K in the cross section including the first direction, like the second incident surface 81. It is formed as a light control surface that is refracted to the side and directed toward the main exit surface 73.
More specifically, as shown in FIG. 14, the first incident surface 80 receives light that directly reaches the incident surface 71 from the light emitting point Q that is the base point on the optical axis corresponding to the position of the light source. When the refraction angle when passing through the surface 71 is θ1, the sign of θ1 is negative on the optical axis K side with respect to the normal F of the incident surface 71, and the opposite side is positive. 80 and the second incident surface 81 both have a negative sign of θ1 and refract light toward the optical axis K.

In the cross section including the first direction, the first incident surface 80 refracts the light toward the optical axis K, so that the spread of the light incident on the first incident surface 80 is suppressed. Accordingly, the length Na (FIG. 11) in the first direction can be shortened on the main exit surface 73 on which this light is incident, and a compact illumination lens 33 can be configured.
Thereby, when providing several LED51 and the lens 33 for illumination in the globe 30, it becomes possible to provide more LED51 and the lens 33 for illumination, and high output becomes easy.

FIG. 15 is an illuminance distribution diagram of the security light 1 having the illumination lens 33.
As shown in this figure, the security light 1 irradiates a road surface 8R having a width of about 6 meters in the transverse direction W to a distance of 10 meters in each direction along the street direction G.
In this irradiation region, in both end areas Wa in the transverse direction W, the light flux M1 traveling in the globe 30 deviating from the main exit surface 73 of the illumination lens 33 in the cross section including the transverse direction W is the first reflecting surface. 75 and the auxiliary exit surface 74 are directed and illuminated. In the security light 1, if the first reflection surface 75 and the auxiliary emission surface 74 are not provided, the light beam M1 irradiates the area H behind the security light 1 (opposite the street 8). This causes light pollution and light waste. In particular, since the area H irradiated with the light flux M1 is relatively close to the security light 1, the illuminance of the area H is also relatively large, and the influence of leakage light becomes significant. By using such a light beam M1 for irradiation of both end areas Wa in the transverse direction W, light damage can be suppressed and light utilization efficiency can be increased.

  Further, in the irradiation area, the light flux whose light is controlled to be incident on the main exit surface 73 of the illumination lens 33 by the second entrance surface 81 in the cross section including the street direction G in both end areas Ga in the street direction G. M3 is irradiated. As described above, the light beam M3 is light that travels through the globe 30 while being deviated from the main light exit surface 73 when the second incident surface 81 is not provided. By using such a light beam M3 for the irradiation of both end areas Ga in the street direction G, the light use efficiency can be increased, and the distance of the irradiation region to the far side in the street direction G can be extended.

  Further, in this irradiation area, in the area L on the front side (nearly underneath) of the security light 1, light control was performed so that the first emission surface 73A included in the main emission surface 73 is wider than the second emission surface 73B. Light is irradiated. Thereby, it is suppressed that the illuminance of the area L becomes excessively higher than others, and unevenness of the illuminance distribution in the irradiation region is suppressed.

  Here, the security light 1 of the present embodiment has a vertically long and substantially rectangular shape whose bottom surface (outgoing surface) is long in the transverse direction W of the street 8, but is not limited to this, as in the modification shown in FIG. The bottom may have a substantially rectangular shape that is long in the street direction G of the street 8. FIG. 16 is an exploded perspective view schematically showing a configuration of a security light 100 according to a modification. In this modification, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Further, in FIG. 16, illustration of detailed configurations such as screw holes, screws, packing fitting grooves, packing, and the like is omitted, but the security light 100 includes various types of devices shown in the above-described embodiment (see FIG. 5). It has a detailed configuration.

  The security light 100 is provided with a recess 118 (storage recess) that is opened at a substantially center of the substrate mounting surface 120 of the irradiator body 110 and is configured by a hollow interior of the support body 113. In addition, the substrate mounting surface 120 has a heat transfer surface 121 that is disposed across the opening of the recess 118. On the front surface 150 </ b> A of the substrate 150, a plurality of LEDs 151 are arranged in two groups, and each group is arranged separately at both ends in the street direction G of the substrate 150. The substrate 150 is divided into a pair of LED mounting portions 150C on which the LEDs 151 are mounted, and a power supply component mounting portion 150D provided approximately at the center of the substrate 150 between the pair of LED mounting portions 150C. The heat transfer surface 121 of the substrate mounting surface 120 is disposed in a region corresponding to the LED mounting portion 150 </ b> C of the substrate 150. The substrate 150 is attached to the substrate attachment surface 120 by bringing the back surface of the LED attachment portion 150C (the surface opposite to the surface on which the LEDs 151 are disposed) into contact with the heat transfer surface 121. Although not shown in the figure, the power supply component mounting portion 150D is provided with a power supply component 61 and a brightness sensor 65 that are included in the power supply circuit.

The power supply component mounting portion 150D of the substrate 150 is disposed at a position corresponding to the concave portion 118 of the irradiator main body 110, and the power supply component disposed on the back surface of the substrate 150 when the substrate 150 is mounted on the substrate mounting surface 120. 61 and the brightness sensor 65 are housed in the recess 118. The bottom surface 110 </ b> A of the irradiator body 110 is covered and closed by the globe 130. The globe 130 is a substantially plate-shaped transparent member, and is formed of, for example, a resin material or glass. The globe 130 integrally covers the LED mounting portion 150C of the substrate 150 and the power supply component mounting portion 150D. The globe 130 is divided into a light source corresponding part 130C corresponding to the LED attaching part 150C and a power supply corresponding part 130D (corresponding part) corresponding to the power supply component attaching part 150D.
Although illustration is omitted, the power supply corresponding part 130D of the globe 130 is formed one step higher on the surface 130A side than the light source corresponding part 130C, or bulges to expand its inside. The mounting legs and the power supply components of the power supply component 61 projecting from the surface 150A of the substrate 150 are housed inside the power supply corresponding portion 30D that is widened in the height direction.

As described above, the security light 1 of the present invention includes the lamp body 10 and the substrate 50 disposed on the substrate mounting surface 20 of the lamp body 10, and the LED 51 is disposed on the surface 50 </ b> A of the substrate 50. The power supply component 61 is disposed on the back surface 50B of the substrate 50, which is shifted laterally from the surface on which the power supply component is disposed, and the housing recess 18 that accommodates the power supply component 61 is formed in the lamp body 10 so as to open on the substrate mounting surface 20.
According to this configuration, the substrate 50 on which the LED 51 and the power supply component 61 are arranged is mounted on the substrate mounting surface 20 with the power supply component 61 stored in the storage recess 18. Therefore, the security light 1 does not need to be connected to each other in the lamp body 10 using the connection parts, and can be easily assembled with a small number of parts.

Further, the LED 51 and the power supply component 61 are arranged on one substrate 50, and the optical sensor 65 is arranged on the back surface 50 </ b> B of the substrate 50 in addition to the power supply component 61.
According to this configuration, there is no need to connect the substrate on which the LED 51 is mounted, the substrate on which the power supply component 61 is mounted, and the optical sensor 65 to each other or separately to the lamp body 10. It is only necessary to attach the single substrate 50 to the lamp body 10. Therefore, the security light 1 can be easily assembled with a small number of parts.

Further, the LED mounting portion 50C of the substrate 50 abuts against the substrate mounting surface 20 of the lamp body 10 so as to allow heat conduction.
According to this configuration, the heat generated by the LED 51 can be transferred from the board mounting surface 20 to the lamp body 10 and radiated from the outer surface of the lamp body 10 to the outside air. Therefore, the heat generated by the LED 51 can be radiated efficiently.

Moreover, the globe 30 that integrally covers the LED 51 and the mounting leg of the power supply component 61 is provided.
According to this configuration, since the LED 51, the mounting leg of the power supply component 61, and the globe 30 are integrally covered, the security light 1 can be easily assembled with a small number of components.

Moreover, the globe 30 that integrally covers the LED 51 and the mounting leg of the power supply component 61 is provided, and the substrate pressing rib 38 that presses the LED mounting portion 50 </ b> C of the substrate 50 is disposed on the globe 30.
According to this configuration, the LED mounting portion 50 </ b> C of the substrate 50 can be pressed against the substrate mounting surface 20 by integrally covering the LED 51, the mounting leg of the power supply component 61, and the globe 30. As a result, the LED mounting portion 50C can be brought into close contact with the board mounting surface 20, and the heat generated by the LED 51 can be efficiently transferred to the heat transfer surface 21.

Further, the globe 30 is integrally provided with an illumination lens 33 corresponding to the LED 51.
According to this configuration, since the globe 30 integrally includes the illumination lens 33, the security light 1 can be easily assembled with a small number of parts.

Further, the globe 30 is divided into a light source corresponding part 30C which is a corresponding part of the LED 51 and a power supply corresponding part 30D which is a corresponding part of the mounting leg of the power supply component 61, and the power supply corresponding which is a corresponding part of the mounting leg of the power supply component 61 is supported. The portion 30D is formed one step higher.
According to this configuration, the globe 30 can be attached without buffering the mounting leg of the power supply component 61.

Further, a water-stopping packing 19 was disposed around the outer periphery of the substrate 50, and the water-stopping packing 19 was sandwiched between the lamp body 10 and the globe 30.
According to this configuration, the substrate 50 can be easily waterproofed by the packing 19 by attaching the globe 30 to the lamp body 10.

In addition, a lighting opening 15 serving as a lighting unit corresponding to the brightness sensor 65 is disposed on the wall surface of the storage recess 18.
According to this configuration, the power sensor 61 and the brightness sensor 65 are housed in the recess 18, and the board 50 is attached to the lamp body 10, whereby the brightness sensor 65 can be disposed in the daylighting unit. Therefore, the security light 1 can be easily assembled with a small number of parts.

Further, a C-shaped wall 26 surrounding the daylighting opening 15 was formed on the outer wall surface of the housing recess 18.
According to this configuration, the sensor cover 17 inserted into the daylighting opening 15 can be prevented from being taken or damaged by birds.

In addition, the electric wire holder 25 is disposed inside the storage recess 18.
According to this configuration, the electric wire 62 can be held in the electric wire holder 25 and accommodated in the concave portion 18, and when the security light 1 is assembled, wiring in the concave portion 18 of the electric wire 62 can be easily performed. it can.

Further, according to the present embodiment, the incident surface 71 of the illumination lens 33 is connected to the first incident surface 80 which is a curved surface convex toward the exit surface 72 and the edge 80A of the first incident surface 80. A second incident surface 81 provided between the incident surface 80 and the bottom surface of the illumination lens 33, and both the first incident surface 80 and the second incident surface 81 are incident from the light emitting point Q. Is refracted toward the optical axis K.
According to this configuration, the light utilization efficiency is enhanced by the refracting action of the second incident surface 81, and the first incident surface 80 refracts the light toward the optical axis K, so that the spread of the light is suppressed. Therefore, the size of the emission surface 72 can be reduced. Thereby, it is possible to obtain an illumination lens 33 that is compact but has high efficiency.

Further, according to the present embodiment, the second incident surface 81 is configured such that the incident light is incident on the first direction end portion 73 </ b> T of the main exit surface 73.
According to this configuration, if there is no second incident surface 81, light that is wasted is used for distant illumination in the first direction, thus compensating for the shortage of illuminance in the far direction of the irradiation region in the first direction, The distance can be extended efficiently.

Further, according to the present embodiment, the back surface 30B of the globe 30 corresponding to the bottom surface of the illumination lens 33 has a second direction (transverse direction W) orthogonal to the direction of the optical axis K and the first direction (street direction G). The first reflection surface 75 that reflects light toward the emission surface 72 is provided on both sides of the incident surface 71 in FIG.
According to this configuration, in the cross section including the second direction, the light that travels in the globe 30 away from the emission surface 72 can be used for illumination, and the light use efficiency is increased.

Further, according to the present embodiment, the emission surface 72 includes the auxiliary emission surface 74 that receives the light reflected by the first reflection surface 75 and distributes the light in the second direction.
According to this configuration, the second direction can be efficiently illuminated.
Note that, depending on the light control mode of the emission surface 72, the first reflection surfaces 75 may be provided on both sides of the incident surface 71 in the cross section including the optical axis K and the first direction.

In addition, according to the present embodiment, the auxiliary emission surface 74 is configured to reflect light directly incident from the incident surface 71 toward the bottom surface side of the illumination lens 33.
According to this configuration, it is possible to prevent light components that cannot be controlled by the auxiliary light exit surface 74 from being emitted.

Further, according to the present embodiment, the first reflecting surface 75 and the auxiliary emitting surface 74 are all totally reflecting surfaces.
Thereby, the illumination lens 33 with very high light utilization efficiency can be obtained.
Note that both the first reflection surface 75 and the auxiliary emission surface 74 are not necessarily required to be total reflection surfaces.

The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.
For example, in the above-described embodiment, the crime prevention light 1 is illustrated as an example of an outdoor installation type lighting device. However, the present invention is not limited thereto, and the present invention can also be applied to a street light, a road light, and a projector.
Moreover, although LED51 was illustrated as an example of a light emitting element, it is not restricted to this, Other light emitting elements, such as organic EL, may be sufficient.
In addition, the substrate 50 is configured to include the LED attachment portion 50C and the power supply component attachment portion 50D on a single substrate, but is not limited thereto, and the LED attachment portion 50C, the power supply component attachment portion 50D, May be provided on different substrates.
Moreover, although the globe 30 is configured to include the light source corresponding part 30C and the power supply corresponding part 30D integrally, the light source corresponding part 30C and the power supply corresponding part 30D are formed separately from each other. Also good.
Further, although the plurality of LEDs 50 are provided on the substrate 50, the number of LEDs 50 may be one. In this case, one illumination lens 33 is provided on the globes 30 and 130.

1,100 Crime prevention light (lighting device)
30, 130 Globe 33 Lighting lens 8 Street 8R Road surface M1, M2, M3 Light flux 51, 151 LED (light emitting element)
51A1 Light emitting surface 70 Recessed portion 71 Incident surface 72 Outgoing surface 73 Main outgoing surface 73T First direction end 74 Auxiliary outgoing surface 75 First reflecting surface 80 First incident surface 81 Second incident surface G Street direction K Optical axis Q Light emitting point W Transverse direction

Claims (6)

In the illumination lens that is provided with a curved incident surface convex on the exit surface side and distributes the light of the light source incident on the incident surface in a first direction orthogonal to the optical axis direction,
On the bottom surface,
An illumination lens comprising a first reflecting surface that reflects light toward the exit surface on both sides of the entrance surface in the optical axis direction and a second direction orthogonal to the first direction. . The exit surface is
The illumination lens according to claim 1, further comprising an auxiliary emission surface on which light reflected by the first reflection surface is incident and distributes light in the second direction. The auxiliary emission surface is
The illumination lens according to claim 2, wherein light that is directly incident from the incident surface is reflected toward the bottom surface.   The illumination lens according to claim 3, wherein the first reflection surface and / or the auxiliary emission surface is a total reflection surface. The incident surface is
A first incident surface that is a convex curved surface, and a second incident surface that is connected to an edge of the first incident surface and is provided between the first incident surface and the bottom surface,
5. The illumination lens according to claim 1, wherein each of the first incident surface and the second incident surface refracts light incident from the light source toward the optical axis. . A substrate provided with one or a plurality of light emitting elements to be the light source;
A plate-like cover member that covers the substrate,
The illumination device according to claim 1, wherein the illumination lens according to claim 1 is provided on the substrate at a position corresponding to the light emitting element.