Outdoor lighting equipment

Abstract

To provide an outdoor lighting device that offers improved light distribution design and effectively illuminates the area directly in front of the user's feet. [Solution] An outdoor lighting device comprising a support column erected in the ground, and a head portion provided at the upper end of the support column so as to protrude forward and having multiple light sources inside, wherein the head portion has an opening on the lower surface of the part that protrudes from the support column through which light from the multiple light sources passes, and the optical axis of each of the multiple light sources is inclined forward with respect to the vertical direction.

Description

Technical Field

[0001] The present disclosure relates to an outdoor lighting device.

Background Art

[0002] Conventionally, outdoor lighting devices that are erected and used on the outdoor ground such as a residential garden or a front approach have been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An outdoor lighting device is required to be inconspicuous during the day and to be able to gently illuminate the feet of residents and visitors at night. Therefore, it is desirable that the outdoor lighting device is configured to provide a compact head portion at the upper end of the column and irradiate light downward from the head portion toward the ground.

[0005] However, the light irradiated downward forms a V-shaped shadow (the shadow of the column) behind the column by also wrapping around behind the column. The V-shaped shadow not only reduces the designability of the light distribution illuminated on the ground, but also causes the amount of light reaching the front feet that should originally be illuminated to decrease due to the light wrapping around behind the column. Therefore, there is room for improvement in conventional outdoor lighting devices from the viewpoint of improving the designability of the light distribution and effectively illuminating the front feet.

[0006] An object of the present disclosure is to provide an outdoor lighting device that improves the designability of the light distribution and can effectively illuminate the front feet.

Means for Solving the Problems

[0007] This disclosure relates to an outdoor lighting device comprising a support column erected in the ground, and a head portion provided at the upper end of the support column so as to protrude forward and having a plurality of light sources inside, wherein the head portion has an opening on the lower surface of the part that protrudes from the support column through which light from the plurality of light sources passes, and the optical axis of each of the plurality of light sources is inclined forward with respect to the vertical direction. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of an outdoor lighting device according to one embodiment, viewed from below and in the front. [Figure 2] This is a perspective view of an outdoor lighting device according to one embodiment, viewed from above and behind. [Figure 3] This is a perspective view showing an outdoor lighting device disassembled according to one embodiment. [Figure 4] This is a vertical cross-sectional view of the upper end of an outdoor lighting device according to one embodiment. [Figure 5] This is a perspective view of the head portion of an outdoor lighting device according to one embodiment, viewed from below. [Figure 6] This is a perspective view of the bracket of an outdoor lighting device according to one embodiment, viewed from above. [Figure 7] This is a perspective view of the upper end of an outdoor lighting device according to one embodiment, viewed from below. [Figure 8] This diagram illustrates the arrangement relationship between a light source and an opening in an outdoor lighting device according to one embodiment. [Figure 9] This is a schematic side view showing light emitted from an outdoor lighting device according to one embodiment. [Figure 10] This is a schematic plan view showing light emitted from an outdoor lighting device according to one embodiment. [Figure 11] This diagram shows the relationship between the tilt angle of the light source at the head and the V-shaped shadow it casts. [Figure 12] This figure shows the relationship between the light emission length and light emission width of the light source in the head unit. [Figure 13] This figure shows the relationship between the opening length of the head section, the length of the head section, and the floor surface illuminance distribution. [Figure 14] This graph shows the range of illuminance (5 Lx) for different aperture lengths at a height of 500 mm for outdoor lighting fixtures. [Figure 15] This graph shows the range of illuminance (1 Lx) for different opening lengths at a height of 500 mm for outdoor lighting fixtures. [Figure 16] This graph shows the range of illuminance (5 Lx) for different aperture lengths at a height of 300 mm for outdoor lighting fixtures. [Figure 17] This graph shows the range of illuminance (1 Lx) for different aperture lengths at a height of 300 mm for outdoor lighting fixtures. [Figure 18] This is a perspective view of an outdoor lighting device according to another embodiment, viewed from the front and below. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will now be described in detail with reference to the drawings. As shown in Figures 1 to 3, the outdoor lighting device 1 comprises a support column 2, a head portion 3 provided at the upper end of the support column 2, and a spike 4 provided at the lower end of the support column 2. The outdoor lighting device 1 is erected substantially perpendicular to the ground G by driving the spike 4 into the ground G (see Figure 9).

[0010] Here, we define the directions indicated by the arrows in the figure. The arrows in the figure indicate the directions when the outdoor lighting device 1 is erected on the ground G. The X-axis along X1-X2 indicates the left-right and width directions of the outdoor lighting device 1. X1 indicates the right side when the outdoor lighting device 1 is viewed from the front, and X2 indicates the left side when the outdoor lighting device 1 is viewed from the front. The Y-axis along Y1-Y2 indicates the front-back and depth directions of the outdoor lighting device 1. Y1 indicates the front of the outdoor lighting device 1, and Y2 indicates the rear of the outdoor lighting device 1. The front of the outdoor lighting device 1 is the surface facing forward. The Z-axis along Z1-Z2 indicates the up-down direction of the outdoor lighting device 1. Z1 indicates the top of the outdoor lighting device 1, and Z2 indicates the bottom of the outdoor lighting device 1.

[0011] The support column 2 is made of an extruded profile having a hollow square tube shape formed of a metal material such as aluminum. The support column 2 has a rectangular cross-sectional shape with a larger dimension in the left-right direction than in the front-back direction. The support column 2 extends straight up and down with the same cross-sectional shape. The vertical length of the support column 2 is not particularly limited, but from the viewpoint of effectively illuminating the feet while not making the outdoor lighting device 1 conspicuous, in a state of being erected on the ground G, the height from the ground G (floor surface) to the upper end surface of the head portion 3 is formed to be 300 mm or more and 500 mm or less. From the viewpoint of not making the outdoor lighting device 1 conspicuous, it is preferable that the dimension of the support column 2 in the front-back direction is about 30 mm and the dimension of the support column 2 in the left-right direction is about 50 mm. As shown in FIG. 2, on the lower end side of the rear surface 2a of the support column 2, a grommet 21 with a film for closing the wiring insertion hole is provided. On the rear surface 2a of the support column 2, above the grommet 21 with a film, two upper and lower holes 22a, 22b communicating the inside and outside of the support column 2 are provided. The upper hole 22a mainly functions as a ventilation hole, and the lower hole 22b mainly functions as a drain hole.

[0012] The head portion 3 has a light source unit substrate 6 inside and constitutes a light projecting portion that emits light in the outdoor lighting device 1. The head portion 3 has a rectangular parallelepiped box shape with an open lower surface side made of a metal material such as aluminum. Specifically, as shown in FIGS. 4 and 5, the head portion 3 includes a rectangular top plate portion 31 that is long in the front-back direction and a peripheral wall portion 32 that projects downward along the outer periphery of the top plate portion 31. The vertical dimension of the head portion 3, that is, the height dimension of the peripheral wall portion 32 is not particularly limited, but from the viewpoint of accommodating necessary components inside the head portion 3 while forming it compactly, it is preferably about 20 mm. On the inner periphery of the peripheral wall portion 32, a stepped portion 321 having a height lower than that of the top plate portion 31 from the peripheral wall portion 32 is formed over the entire circumference of the peripheral wall portion 32. From the viewpoint of not making the outdoor lighting device 1 conspicuous, the dimension of the head portion 3 in the front-back direction is preferably about 60 mm, and the dimension of the head portion 3 in the left-right direction coincides with the dimension of the support column 2 in the left-right direction.

[0013] The head portion 3 is attached to the upper end portion of the column 2 via a bracket 5. The head portion 3 attached to the column 2 protrudes forward so as to be orthogonal to the extending direction of the column 2 (the vertical direction of the column 2). The position of the rear end surface 3a of the head portion 3 coincides with the position of the rear surface 2a of the column 2. In a state where the column 2 is erected vertically with respect to the ground G, the head portion 3 protrudes horizontally forward from the column 2. In the head portion 3, a protruding portion 30 is constituted by a portion that protrudes forward from the column 2. The top plate portion 31 of the head portion 3 is horizontally arranged in the front-rear direction and is arranged so as to protrude forward from the column 2. Thereby, the outdoor lighting device 1 is formed in an inverted L shape in side view. The inverted L-shaped outdoor lighting device 1 has an effect of not being conspicuous when erected on the ground G.

[0014] As shown in FIG. 5, inside the head portion 3, a support base portion 33 for supporting the light source unit substrate 6 is formed. The support base portion 33 extends from a position slightly rearward to the front side from the substantially central portion in the front-rear direction of the head portion 3. As shown in FIG. 4, the rear end portion of the support base portion 33 is disposed above the column 2, and the front end portion of the support base portion 33 extends forward of the column 2. The support base portion 33 protrudes downward from the top plate portion 31 inside the head portion 3. The lower surface of the support base portion 33 constitutes the mounting surface 33a of the light source unit substrate 6. The mounting surface 33a is a flat surface, is inclined upward from the rear of the head portion 3 toward the front, and is formed so as to face obliquely forward below the head portion 3 and in front of the column 2.

[0015] Inside the head portion 3, two screw pedestal portions 34, 34 are provided behind the support base portion 33. The screw pedestal portion 34 is formed in a columnar shape and has a screw hole 34a into which a screw 514 (described later) for fixing to the bracket 5 is screwed. The two screw pedestal portions 34, 34 are arranged side by side with a space therebetween inside the head portion 3.

[0016] The bracket 5 is formed of a metal material such as aluminum or a resin material, and as shown in FIGS. 3, 4, and 6, has a bracket main body 51, an extension portion 52, and an opening 53.

[0017] The bracket body 51 has a rectangular tubular outer diameter shape that conforms to the internal shape of the rectangular tubular support column 2, and is inserted into the interior of the support column 2 from the upper end. As shown in Figure 6, the bracket body 51 has an upper wall portion 511 that closes the upper surface. The upper wall portion 511 is positioned below the upper end surface of the bracket body 51. Therefore, a protruding wall portion 510 is formed around the upper wall portion 511, projecting upwards along its entire circumference. A cable insertion hole 512 is formed in the center of the upper wall portion 511. As shown in Figure 4, the cable 62 extending from the light source unit substrate 6 inside the head portion 3 is inserted through the cable insertion hole 512 and routed inside the support column 2. The upper wall portion 511 is provided with two screw base portions 513, 513 positioned on either side of the cable insertion hole 512. The screw base portion 513 is formed in a cylindrical shape and has a screw insertion hole 513a through which a screw 514 that fixes the head portion 3 and the bracket 5 is inserted. The two screw base portions 513, 513 are arranged side by side, corresponding vertically to the positions of the two screw base portions 34, 34 on the head portion 3.

[0018] The extension portion 52 is a plate member that forms the opening 53. It is formed as a rectangular plate integral with the bracket body 51 and extends horizontally from the upper end of the bracket body 51 toward the front of the support column 2, just like the head portion 3. As shown in Figures 4 and 7, the extension portion 52 is positioned to fit into and close the lower surface of the protrusion 30 of the head portion 3. More specifically, as shown in Figure 4, the extension portion 52 is fitted inside the peripheral wall portion 32 by being housed in the stepped portion 321 of the protrusion 30. As a result, the lower surface of the extension portion 52 is positioned so that it does not protrude below the lower surface of the head portion 3.

[0019] The opening 53 is a horizontally elongated rectangular opening in the extension 52, allowing light emitted from the light source 61 (described later) located inside the head portion 3 to pass through. As shown in Figures 4 and 7, the rear side edge 53a of the opening 53, which is the edge on the support column 2 side, is positioned in front of the front surface 2b of the support column 2. As shown in Figure 6, the upper surface of the extension 52 is flush with the upper end surface of the protruding wall portion 510 of the bracket body 51. A recess 521 is formed on the upper surface of the extension 52, enclosing the opening 53 around its entire circumference.

[0020] As shown in Figures 3 and 4, a cover member 7 is attached to the upper surface of the extension portion 52 so as to close the opening 53. The cover member 7 is fitted into the recess 521 of the extension portion 52 and fixed to the extension portion 52 via waterproof double-sided adhesive tape 71. This shields the opening 53 from rainwater, dust, etc. entering the inside of the head portion 3. The cover member 7 is a resin plate such as an acrylic plate or a glass plate. The cover member 7 is not limited to a transparent plate as long as it is light-transmitting; it may also be a translucent plate. Note that in Figure 7, for the sake of explanation, the cover member 7 is not shown, so the light source unit substrate 6 inside the head portion 3 is exposed. The cover member 7 is not limited to being attached by double-sided adhesive tape 71; it may also be fixed to the extension portion 52 by fitting it into the recess 521, fixing it to the extension portion 52 with screws, etc.

[0021] As shown in Figure 4, the head portion 3, which has a light source unit substrate 6 mounted inside, and the bracket 5 are assembled together by a screw 514. The screw 514 is screwed from below the bracket body 51, through the screw insertion hole 513a of the screw base portion 513, and into the screw hole 34a of the screw base portion 34 of the head portion 3. The protruding wall portion 510 and the extension portion 52 of the bracket body 51 assembled to the head portion 3 are positioned within the stepped portion 321 of the head portion 3 and fitted inside the peripheral wall portion 32. With the bracket body 51 inserted inside the support column 2, the bracket 5 is fixed to the support column 2 by a screw 23 that penetrates the bracket body 51 from the rear surface 2a of the support column 2.

[0022] The light source unit substrate 6 is constructed by mounting a plurality of light sources 61 and drive circuit components for the light sources 61 on a substrate 60. In this embodiment, an LED (Light Emitting Diode) element with a dome-shaped lens is used as the light source 61, but the light source 61 is not limited to an LED as long as it emits light itself, it may be a light bulb or the like. As shown in Figures 4 and 7, the plurality of light sources 61 are arranged in a line along the width direction of the opening 53 on the surface of the substrate 60. That is, the plurality of light sources 61 are arranged in a line along the left-right direction of the support column 2 and the head portion 3. In this embodiment, the light source unit substrate 6 has five light sources 61, but the number of light sources 61 is not limited in any way.

[0023] As shown in Figure 4, the light source unit board 6 is fixed to the mounting surface 33a of the support base 33 by thermally conductive double-sided adhesive tape 63 inside the head portion 3 such that the multiple light sources 61 face downwards. As a result, the light source unit board 6 is positioned inclined above the opening 53 inside the head portion 3, along the slope of the mounting surface 33a, so as to face below the head portion 3 and diagonally in front of the support column 2. The rear end of the light source unit board 6 is positioned behind the extension portion 52 of the bracket 5 and above the upper wall portion 511 of the bracket body 51. The cable 62 that supplies power to the light source unit board 6 is routed from the rear end of the light source unit board 6 through the cable insertion hole 512 of the bracket 5 into the interior of the support column 2. A silicone sponge sheet 621 is provided between the rear end of the light source unit board 6 and the upper wall portion 511 of the bracket body 51 to protect the end of the cable 62 connected to the light source unit board 6. The cable 62 is fixed to the inner surface of the bracket body 51 by a binding member 622 inside the support column 2.

[0024] Here, the arrangement configuration of the light sources 61 inside the head unit 3 will be further explained with reference to Figure 8. As shown in Figure 8, the optical axis Ax of the multiple light sources 61 is also tilted, as the light source unit substrate 6 is mounted inclined inside the head unit 3. Specifically, the optical axis Ax is tilted forward at an angle θ with respect to a vertical line Z0 extending vertically downward from the light source center O of the light source 61. As a result, as schematically shown in Figures 9 and 10, the light around the optical axis Ax emitted from the light source 61 through the opening 53 is concentrated in front of and below the outdoor lighting device 1, and the amount of light that wraps around to the rear of the support column 2 is reduced. Consequently, the light distribution formed on the ground G by the light Ir emitted from the outdoor lighting device 1 is formed to spread appropriately in front of the support column 2 with a width W1 in the front-to-back direction and a width W2 in the left-to-right direction.

[0025] From the perspective of effectively illuminating the ground outdoors with good aesthetics, the widths W1 and W2 are preferably about 1.5m to 2.5m. Behind the support column 2, although the area of ​​shadow cast by the support column 2 expands, the amount of light that wraps around behind the support column 2 is reduced, so the angle of the V-shape of the shadow becomes large and the outline becomes ambiguous, and a clear cut-off line is not formed. Therefore, the outdoor lighting device 1 is less likely to form a clearly defined V-shaped shadow behind the support column 2, improving the aesthetics of the light distribution and effectively illuminating the ground in front.

[0026] Figure 11 shows the simulation results of the light distribution when the tilt angle θ of the optical axis Ax of each light source 61 in the head unit 3 is set to 0°, 15°, 30°, 45°, and 60°. The height from the floor to the upper end surface of the head unit 3 is set to 400 mm. The luminous flux value of the light source 61 is 100 Lm. When θ = 0° (aligned with the vertical line Z0 shown in Figure 8), the largest V-shaped shadow is formed behind the support column 2 (left side in Figure 11), and the spread of light forward is small. As the tilt angle θ increases, that is, as the optical axis Ax is tilted forward, the V-shaped shadow becomes smaller, but the illuminance of the light illuminating the floor surface also decreases accordingly. Therefore, as schematically shown in Figures 9 and 10, in order to reduce the V-shaped shadow and create a light distribution with good aesthetic appeal, and to effectively illuminate the area in front of the feet with appropriate illumination, it is desirable that the inclination angle θ of the optical axis Ax be greater than 15° and less than 45°. Specifically, it is more preferable that the optical axis Ax of each of the multiple light sources 61 is inclined forward at an angle of 25° to 35° with respect to the vertical direction, and most preferably at an angle of 30°.

[0027] The inclination angle θ of the optical axis Ax of the light source 61 is determined by the inclination angle of the mounting surface 33a of the support base 33 to which the light source unit substrate 6 is attached. With this, by simply attaching the light source unit substrate 6 to the mounting surface 33a, multiple light sources 61 having an optical axis Ax at a desired inclination angle θ can be easily arranged inside the head unit 3. However, it is sufficient that the multiple light sources 61 are arranged inside the head unit 3 so that the optical axis Ax has an optical axis Ax at the desired inclination angle θ. Therefore, the light source unit substrate 6 may be constructed by mounting the multiple light sources 61 at an inclination with respect to the substrate 60 so that the optical axis Ax is at the desired inclination angle θ, or the substrate 60 in the areas of the multiple light sources 61 may be formed at an inclination. With these, it is not necessary to mount the entire light source unit substrate 6 at an inclination, so the height dimension can be reduced and a more compact head unit 3 can be constructed.

[0028] Figure 12 shows the results of a simulation of the light distribution when the tilt angle θ of the optical axis Ax of each light source 61 of the head unit 3 is set to 30°, and the emission length and emission width are varied. The height from the floor to the upper end surface of the head unit 3 is set to 400 mm. The emission length indicates the distance from the rear side edge 53a of the opening 53 to each light source 61 extending forward. The emission width indicates the width in the left-right direction of the multiple light sources 61 arranged in a line. From this, it can be seen that for any emission width, the smaller the emission length, that is, the closer each light source 61 is to the rear side edge 53a of the opening 53, the smaller the V-shaped shadow formed behind the support column 2 (left side in Figure 12). It is considered that the emission width does not have a significant effect on the formation of the V-shaped shadow behind the support column 2. Therefore, it is desirable that each light source 61 be positioned on the surface of the light source unit substrate 6 towards the rear of the opening 53, and that when the opening 53 is viewed from directly below, they be arranged in a line towards the rear edge 53a of the opening 53.

[0029] Specifically, as shown in Figure 8, the light source center O of each light source 61 is positioned closer to the support column 2 than the center of the opening 53 in the front-to-back direction when the opening 53 is viewed from directly below. More specifically, the light source center O is positioned behind the rear side edge 53a of the opening 53 by a dimension D, and in front of the front surface 2b of the support column 2. The vertical line Z0 extending from the light source center O is positioned between the rear side edge 53a of the opening 53 and the front surface 2b of the support column 2. This allows the light emitted from the light source 61 and directed towards the rear to be effectively cut off by the rear side edge 53a of the opening 53. The rearward light Rr that passes through the rear side edge 53a is emitted in a direction inclined forward of the vertical line Z0, so the amount of light that passes through the opening 53 and wraps around to the rear of the support column 2 can be further reduced. Dimension D is set appropriately depending on conditions such as the height of the support column 2, and is not particularly limited, but from the viewpoint of improving the aesthetic design of the light distribution and effectively illuminating the area in front of the feet, it can be set to, for example, 1 mm or more and 5 mm or less.

[0030] The light source center O of the light source 61 is positioned above the upper surface 52a of the extension portion 52 of the bracket 5 by a height H. The upper surface 52a is the upper surface of the recess 521 of the extension portion 52. The height H is set appropriately depending on conditions such as the length of the support column 2 and is not particularly limited, but from the viewpoint of reducing light leakage to the rear of the support column 2 and ensuring that the rear light Rr transmitted through the rear side edge portion 53a is appropriately directed downward, thereby more effectively improving the design of the light distribution and ensuring that light is efficiently directed in front of the support column 2, it can be set to, for example, 3 mm or more and 7 mm or less.

[0031] Figure 13 shows the simulation results of the relationship between the aperture length of the head unit 3, the head length, and the floor surface illuminance distribution. The height from the floor surface to the upper end surface of the head unit 3 is set to 500 mm. The aperture length is the length of the opening 53 in the front-to-back direction, specifically the distance between the rear side edge 53a and the front side edge 53b. The head length is the length of the head unit 3 in the front-to-back direction. The ray extraction rate is the ratio of the rays emitted from the light source 61 that reach the floor surface. Each light source 61 is arranged in a single row, and the tilt angle θ of the optical axis Ax is set to 30°. The height H shown in Figure 8 is 7 mm, the dimension D is 2 mm, and the width of the opening 53 in the left-to-right direction is set to 35 mm.

[0032] According to this, no V-shaped shadow is observed behind the support column 2 (left side in Figure 13) under any of the conditions. As the aperture length increases, that is, as the position of the front side edge 53b of the opening 53 moves forward, the light extends forward towards the front of the support column 2 (right side in Figure 13). However, when the aperture length is 30 mm or more, no change is observed in the floor illuminance distribution and light extraction rate, indicating that the light is equivalent. There is no difference in the spread of light in the left-right direction (up-down direction in Figure 13) of the support column 2 with respect to the aperture length. Therefore, from the viewpoint of efficiently irradiating light toward the front of the support column 2, it is preferable that the aperture length of the opening 53 be between 20 mm and 30 mm. This result has also been confirmed to be true when the height from the floor to the upper end surface of the head part 3 is set to 300 mm.

[0033] Figures 14 to 17 are graphs showing the range of illuminance for each opening length from the support column 2. Figures 14 and 15 show the case where the height from the floor to the upper end surface of the head unit 3 is set to 500 mm. Figure 14 shows the range where the illuminance on the front side from the support column 2 is 5 Lx for each opening length, and Figure 15 shows the range where the illuminance on the front side from the support column 2 is 1 Lx, for each opening length. Figures 16 and 17 show the case where the height from the floor to the upper end surface of the head unit 3 is set to 300 mm. Figure 16 shows the range where the illuminance on the front side from the support column 2 is 5 Lx, and Figure 17 shows the range where the illuminance on the front side from the support column 2 is 1 Lx, for each opening length. The installation conditions for each light source 61 in Figures 14 to 17 are the same as in Figure 13. The origin (0,0) is the position of the light source.

[0034] As shown in Figures 14 and 15, when the height from the floor to the upper end surface of the head unit 3 is set to 500 mm, if the opening length is 20 mm or more, both the illuminance range of 5 Lx and the range of 1 Lx on the front side from the support column 2 reach a range of approximately 1.5 m or more. As shown in Figures 16 and 17, when the height from the floor to the upper end surface of the head unit 3 is set to 300 mm, the spread of light from the support column 2 to the front side is suppressed due to the lower height, but the spread of light in the left-right direction reaches a range of approximately 1.5 m or more. Therefore, from the results in Figures 13 to 17, it is preferable that the opening length of the opening 53 be 20 mm or more and 30 mm or less, and the head length be 60 mm or more and 70 mm or less, in order to make the head unit 3 compact, improve the design of the light distribution, and effectively irradiate light toward the feet in front.

[0035] Figure 18 shows an outdoor lighting device 1A according to another embodiment. Since the parts with the same reference numerals as those in the outdoor lighting device 1 described above are the same components, their descriptions will be based on the above description and will be omitted below. The support column 2 of the outdoor lighting device 1A is formed to be longer than the support column 2 of the outdoor lighting device 1. Instead of the spike 4 of the outdoor lighting device 1, an anchor rod 40 is provided at the lower end of the support column 2. The anchor rod 40 is provided so as to penetrate the lower end of the support column 2 in the left-right direction. The outdoor lighting device 1A is erected in the ground G by burying the lower end of the support column 2 in the ground over a predetermined length.

[0036] The outdoor lighting device 1,1A of this embodiment provides the following effects. The outdoor lighting device 1,1A comprises a support column 2 erected on the ground G, and a head portion 3 provided at the upper end of the support column 2 so as to protrude forward and having a plurality of light sources 61 inside. The head portion 3 has an opening 53 on the lower surface of the protruding portion 30, which is the part that protrudes from the support column 2, through which light from the plurality of light sources 61 is transmitted, and the optical axis Ax of each of the plurality of light sources 61 is inclined forward with respect to the vertical direction. As a result, the V-shaped shadow formed behind the support column 2 is suppressed, the aesthetic design of the light distribution illuminated on the ground G is improved, and the area in front of the user's feet can be effectively illuminated.

[0037] In the outdoor lighting device 1,1A, the multiple light sources 61 are positioned on the column 2 side of the center of the opening 53 when viewed from directly below the opening 53. This effectively cuts off the light emitted from the light sources 61 and directed backward by the rear side edge 53a of the opening 53, further reducing the amount of light that passes through the opening 53 and wraps around to the rear of the column 2.

[0038] In the outdoor lighting device 1,1A, the optical axis Ax of each of the multiple light sources 61 is inclined forward at an angle of 25° to 35° with respect to the vertical direction. This reduces the V-shaped shadow behind the support column 2, creating a more aesthetically pleasing light distribution, and allows for effective illumination of the ground in front with appropriate brightness.

[0039] In the outdoor lighting device 1,1A, the head portion 3 has an extension portion 52, which is a plate member forming an opening 53, on the lower surface of the protruding portion 30, which is the part that protrudes from the support column 2, and the multiple light sources 61 are arranged at a height of 3 mm to 7 mm from the upper surface of the extension portion 52. This makes it possible to irradiate light more efficiently toward the front of the support column 2.

[0040] In the outdoor lighting device 1,1A, the length of the opening along the front-to-back direction is 20 mm to 30 mm. This allows light to be directed more efficiently towards the front of the support column 2.

[0041] In the outdoor lighting device 1,1A, multiple light sources 61 are arranged in a line along the width direction of the opening 53. This reduces the amount of light that wraps around to the rear of the support column 2, thereby making the V-shaped shadow formed behind the support column 2 smaller.

[0042] This disclosure includes outdoor lighting devices as described in the following embodiments.

[0043] <Aspect 1> A support post erected in the ground, The upper end of the support column is provided with a head portion that protrudes forward and has multiple light sources inside, The head portion has an opening on the lower surface of the part that protrudes from the support column, through which light from the multiple light sources is transmitted. An outdoor lighting device in which the optical axes of each of the aforementioned multiple light sources are inclined forward with respect to the vertical direction.

[0044] <Aspect 2> The outdoor lighting device according to embodiment 1, wherein the plurality of light sources are arranged on the side of the support column rather than the center of the opening when viewed from directly below the opening.

[0045] <Aspect 3> The outdoor lighting device according to embodiment 2, wherein the plurality of light sources are arranged on the support column side of the rear side edge of the opening.

[0046] <Aspect 4> An outdoor lighting device according to any one of embodiments 1 to 3, wherein each optical axis of the plurality of light sources is inclined forward at an angle of 25° to 35° with respect to the vertical direction.

[0047] <Aspect 5> The opening is formed in a plate member positioned on the lower surface of the portion of the head that protrudes from the support column, The outdoor lighting device according to any one of embodiments 1 to 4, wherein the plurality of light sources are arranged at a height of 3 mm to 7 mm from the upper surface of the plate member.

[0048] <Aspect 6> An outdoor lighting device according to any one of embodiments 1 to 5, wherein the length of the opening along the front-to-back direction is 20 mm or more and 30 mm or less.

[0049] <Aspect 7> The outdoor lighting device according to any one of embodiments 1 to 6, wherein the plurality of light sources are arranged in a row along the width direction of the opening. [Explanation of symbols]

[0050] 1,1A Outdoor lighting device, 2 Support column, 3 Head section, 30 Projection section, 52 Extension section (plate member), 53 Opening, 53a Rear side edge, 61 Light source, Ax Optical axis, G Ground

Claims

1. A support post erected in the ground, The upper end of the support column is provided with a head portion that protrudes forward and has multiple light sources inside, The head portion has an opening on the lower surface of the part that protrudes from the support column, through which light from the multiple light sources is transmitted. An outdoor lighting device in which the optical axes of each of the aforementioned multiple light sources are inclined forward with respect to the vertical direction.

2. The outdoor lighting device according to claim 1, wherein the plurality of light sources are arranged on the side of the support column rather than the center of the opening when viewed from directly below the opening.

3. The outdoor lighting device according to claim 2, wherein the plurality of light sources are arranged on the support column side of the rear side edge of the opening.

4. The outdoor lighting device according to any one of claims 1 to 3, wherein each optical axis of the plurality of light sources is inclined forward at an angle of 25° to 35° with respect to the vertical direction.

5. The opening is formed in a plate member positioned on the lower surface of the portion of the head that protrudes from the support column, The outdoor lighting device according to any one of claims 1 to 3, wherein the plurality of light sources are arranged at a height of 3 mm to 7 mm from the upper surface of the plate member.

6. The outdoor lighting device according to any one of claims 1 to 3, wherein the length of the opening along the front-rear direction is 20 mm or more and 30 mm.

7. The outdoor lighting device according to any one of claims 1 to 3, wherein the plurality of light sources are arranged in a row along the width direction of the opening.

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