JP6895649B2 - Lighting device - Google Patents

Description

The present disclosure relates to a lighting device.

Conventionally, as a lighting device, a device including an LED light source as a light source unit and a cover for transmitting light emitted from the LED light source to irradiate the outside is known (see, for example, Patent Document 1).

The patent document 1 includes a columnar support member in which a plurality of LED light sources are arranged on the side surface over the entire circumference, and a cover having translucency and arranged so as to surround the columnar support member. The device is disclosed. The plurality of LED light sources are arranged on the side surface of the columnar support member so that their respective light emitting directions face outward in the radial direction, and the light emitted from each LED light source passes through the cover to the side of the cover. I try to illuminate.

Japanese Unexamined Patent Publication No. 2011-028890

However, in the LED light source used as the light source unit, the emitted light generally has directivity in one direction. Therefore, as in the above-mentioned prior art, if a plurality of LED light sources are arranged in a circumferential shape so that their respective light emitting directions face outward in the radial direction, a substantially band-shaped bright region is formed on a portion of the cover facing each LED light source. Will be formed. That is, the irradiation light is biased to a part of the cover which is the irradiation region to the outside of the lighting device.

As described above, in the above-mentioned conventional technique, when the light source portion in which the emitted light has directivity in one direction is used, the irradiation light is biased to a part of the irradiation region to the outside of the lighting device. was there.

Therefore, the present disclosure obtains an illumination device capable of dispersing the irradiation light emitted to the outside in a wider range even when a light source unit in which the emitted light has directivity in one direction is used. With the goal.

The lighting device according to the present disclosure includes a light source unit in which the emitted light has directivity in one direction, and a diffusing unit that transmits and diffuses the light emitted from the light source unit. Then, the diffusing portion transmits the first diffusing portion that diffuses the transmitted light in the first crossing direction that intersects the one direction, and the light that has passed through the first diffusing portion, and transmits the transmitted light in the one direction and the said one. It includes a second diffusion portion that diffuses in a second intersection direction that intersects the first intersection direction.

According to the present disclosure, it is possible to obtain an illumination device capable of dispersing the irradiation light emitted to the outside in a wider range even when a light source unit in which the emitted light has directivity in one direction is used. Can be done.

It is a perspective view which shows typically the state which the lighting device which concerns on one Embodiment is installed in a garden. It is a vertical cross-sectional view which shows the lamp main body of the lighting apparatus which concerns on one Embodiment. It is a horizontal cross-sectional view which shows the irradiation part main body of the lighting apparatus which concerns on one Embodiment. It is a figure which shows typically the state in which the light which passed through the 1st diffusion part of the lighting apparatus which concerns on one Embodiment is diffused. It is a figure which shows typically the state in which the light which passed through the 2nd diffusion part of the lighting apparatus which concerns on one Embodiment is diffused. It is a figure which shows typically the irradiation state in the lighting apparatus which concerns on a comparative example. It is a figure which shows typically the irradiation state in the lighting apparatus which concerns on one Embodiment. It is a perspective view which shows typically the lighting apparatus which concerns on the modification of one Embodiment.

Hereinafter, the lighting device according to the present implementation will be described in detail with reference to the drawings. In the following, as the lighting device, an outdoor lighting device installed outdoors such as a garden or a garden (including a park) will be illustrated, and an LED light source will be used as the light source unit.

As shown in FIG. 1, the lighting device 10 according to the present embodiment is a plant planted around the lighting device 10 by being installed on the ground (installation surface) 2 of the outdoor 1 such as a residential area or a garden. It illuminates the irradiation target object 3 such as.

The lighting device 10 includes a support column (installation member) 20 installed on the ground 2 of the outdoor 1 and a lamp main body (lighting member) 30 attached to the upper part of the support column 20. Specifically, the strut 20 includes a substantially cylindrical strut body 21 and a pedestal portion 22 formed below the strut body 21 and installed on the ground 2, and is provided at the upper end portion of the strut body 21. The lamp body 30 is attached. Then, the lighting device 10 is installed on the ground 2 by embedding and fixing a part of the pedestal portion 22 in the ground. The lighting device 10 can be installed by placing the pedestal portion 22 on the ground 2, and the tip (lower end) of the support column 20 is sharpened so that the sharpened tip is in the ground. It is also possible to install the lighting device 10 by inserting it.

Further, a space S is formed inside the lamp main body 30, and a light source unit 70 is arranged in this space S. Then, the light emitted from the light source unit 70 is irradiated to the outside of the lamp main body 30.

In the present embodiment, as shown in FIG. 2, the lamp main body 30 is connected and fixed to the base portion 40 attached to the upper end portion of the support column main body 21 and the upper end portion of the base portion 40, and is emitted from the light source portion 70. It includes an irradiation unit main body 50 that irradiates the outside with the light. The base portion 40 includes a substantially disk-shaped bottom wall 41 and a substantially cylindrical peripheral wall 42 extending upward from the outer peripheral edge of the bottom wall 41, and has a substantially bottomed cylindrical shape as a whole. Is formed in.

On the other hand, the irradiation unit main body 50 has a translucent bottom wall 510 connected to the upper end of the peripheral wall 42 of the base portion 40, and is a substantially cylindrical panel portion 520 connected to the upper surface of the bottom wall 510. And a lid portion 530 that covers the upper side of the panel portion 520. That is, the irradiation unit main body 50 is formed by sandwiching the panel portion 520 between the bottom wall 510 and the lid portion 530. At this time, a waterproof and dustproof packing 90 is interposed between the lower end of the panel portion 520 and the bottom wall 510, and between the upper end of the panel portion 520 and the lid portion 530.

In the present embodiment, the bottom wall 510 and the lid portion 530 have a light impermeable property that does not allow light to pass through, and the light emitted from the light source portion 70 is transmitted to the outside through the panel portion 520. It has become so. As described above, in the present embodiment, the side portion (panel portion 520) of the irradiation unit main body 50 is the irradiation region of the illumination device 10.

Further, in the present embodiment, an insertion hole 510a is formed in the central portion of the bottom wall 510, and when the irradiation unit main body 50 is connected and fixed to the base portion 40, the space S1 in the base portion 40 and the irradiation portion are formed. The space S2 in the main body 50 is communicated with the space S2. As described above, the space S in the lamp main body 30 is composed of the space S1 in the base portion 40 and the space S2 in the irradiation unit main body 50.

A support bracket 540 having a substantially L-shaped cross section is fixed to the peripheral edge of the insertion hole 510a on the lower surface side of the bottom wall 510, and the support bracket 540 is attached to the peripheral wall 42 of the base portion 40 with bolts 91 and nuts. By fixing at 92, the bottom wall 510 is fixed to the peripheral wall 42.

Further, in the present embodiment, the fixed portion between the bottom wall 510 and the peripheral wall 42 and the fixed portion between the bottom wall 510 and the panel portion 520 are covered with the cover bracket 550. The cover bracket 550 is fixed to the bottom wall 510 by fixing with bolts 91 and nuts 92 in a state where the spacer 93 is interposed between the cover bracket 550 and the lower surface of the bottom wall 510. A waterproof and dustproof packing 90 is interposed between the cover bracket 550 and the panel portion 520.

In the space S of the lamp body 30 having such a configuration, a columnar support member 60 having a substantially square columnar shape is arranged so as to extend in the vertical direction. Specifically, the columnar support member 60 is arranged in the space S of the lamp main body 30 in a state of being inserted into the insertion hole 510a. That is, the columnar support member 60 is arranged in the space S of the lamp main body 30 with the lower portion located in the space S1 of the base portion 40 and the upper portion located in the space S2 of the irradiation unit main body 50. ..

The light source unit 70 is arranged above the columnar support member 60 located in the space S2 of the irradiation unit main body 50. In the present embodiment, four (plurality) light source portions 70 are attached to each side surface 61 of the columnar support member 60 (see FIG. 3). At this time, the four light source portions 70 are attached to the side surface 61 of the columnar support member 60 so that the height positions in the vertical direction are substantially the same (see FIG. 2). As described above, in the present embodiment, the four (plurality) light source portions 70 are arranged in a circumferential shape in the space S of the lamp main body 30.

The light source unit 70 includes an LED light source 71 formed of an LED element (semiconductor element) and a lens (optical member) (not shown), and is unidirectional (normal direction of the emission surface 71a of the LED light source 71: panel). It has directivity in the radial direction of the portion 520). The LED light source 71 is attached to the side surface 61 of the columnar support member 60 via the bracket 72. The fact that the light source unit 70 has directivity in one direction means that the light emitted from the light source unit 70 is irradiated at a predetermined irradiation angle. The irradiation angle of the light source unit 70 can be defined by, for example, an opening angle (half-value angle) in a direction that is half the luminous intensity of the front surface (luminous intensity in front of one direction of the light source unit 70).

Further, the light source unit 70 is placed on the side surface 61 of the support member 60 in a state in which one direction (normal direction of the emission surface 71a of the LED light source 71: radial direction of the panel unit 520) is substantially aligned with the normal direction of the side surface 61. It is installed. By doing so, the light is mainly emitted in the four directions (vertical direction and horizontal direction in FIG. 3) extending substantially horizontally.

A panel portion 520 is arranged on the side surface 61 so as to surround the entire circumference of the columnar support member 60 in which the light source portion 70 is arranged in a circumferential shape. That is, in front of the light source unit 70 in the main optical axis direction (one direction described above), the panel unit 520 is arranged so as to face the light source unit 70 via the space S2 (space S). Therefore, the light emitted from each light source unit 70 passes through the panel unit 520 and is irradiated to the side of the illuminating device 10.

As described above, in the state where the lighting device 10 according to the present embodiment is installed on the ground 2 of the outdoor 1, the light emitted from the light source unit 70 is transmitted through the panel unit 520, and the plant or the like located on the side thereof. It irradiates the irradiation target object 3.

By the way, as described above, the light source unit 70 of the present embodiment has directivity in one direction and is irradiated at a predetermined irradiation angle. Therefore, if the number of light source units 70 used is small, it is not possible to irradiate light from the entire circumference of the panel unit 520. Therefore, in order to irradiate light from the entire circumference of the panel portion 520, it is necessary to arrange more light source portions 70 in a circumferential shape. However, if more light source units 70 are used, the manufacturing cost becomes high. Therefore, while reducing the number of light source units 70 used as much as possible, it is possible to irradiate light from the entire circumference of the panel unit 520. Is preferable.

Therefore, in the present embodiment, a diffusion unit 80 is provided to transmit and diffuse the light emitted from the light source unit 70, and the light emitted from the light source unit 70 is transmitted through the diffusion unit 80 in the horizontal direction (circumferential direction). By diffusing into, it is made to irradiate from the entire circumference of the panel portion 520.

However, simply by irradiating the light from the entire circumference of the panel portion 520, as shown in FIG. 6, a substantially band-shaped bright region is formed in a portion of the panel portion 520 that faces the light source portion 70 in the radial direction. It ends up. That is, the irradiation light is biased to a part of the panel portion 520 which is the irradiation region to the outside of the lighting device 10.

As described above, when the light source unit 70 in which the emitted light has directivity in one direction is used, there is a problem that the irradiation light is biased to a part of the irradiation region to the outside of the lighting device 10.

Therefore, in the present embodiment, even when the light source unit 70 in which the emitted light has directivity in one direction is used, the irradiation light emitted to the outside can be dispersed in a wider range.

Specifically, the panel portion 520 has an inner cylinder (first panel) 521 and an inner cylinder 521 arranged so as to surround the entire circumference of the columnar support member 60 in which the light source portion 70 is arranged in a circumferential shape on the side surface 61. An outer cylinder (second panel) 522, which is arranged so as to surround the entire circumference of the above, is provided. That is, the inner cylinder 521 is arranged in front of the light source unit 70 in the main optical axis direction (one direction described above) so as to face the light source unit 70 via the space S3, and the outer cylinder 522 provides the space S4. It is arranged so as to face the inner cylinder 521 via the inner cylinder 521.

Further, the diffusion unit 80 is provided with a first diffusion unit 81 that diffuses the transmitted light in at least the vertical direction (the first intersection direction that intersects one direction). Further, the diffusion unit 80 transmits the light transmitted through the first diffusion unit 81 and diffuses it in the horizontal direction (circumferential direction: one direction and the second intersection direction intersecting the first intersection direction). I tried to prepare.

Here, in the present embodiment, the inner cylinder (first panel) 521 is formed by using a milky white acrylic resin in which a light diffusing material is dispersed. By doing so, when the light is transmitted through the inner cylinder (first panel) 521, the light irradiation area is expanded as a whole (expanded in the vertical direction and the horizontal direction) (see FIG. 4).

The circle shown by the broken line in FIG. 4 is an irradiation region of light emitted from the light source unit 70, and is an irradiation region of light before passing through the inner cylinder (first panel) 521. Further, the substantially circumferential boundary line (slightly blurred boundary line) of the white portion in FIG. 4 is an irradiation region of light emitted from the light source unit 70, and has passed through the inner cylinder (first panel) 521. It is the irradiation area of the later light. That is, most of the light emitted from the light source unit 70 is incident on the inner cylinder (first panel) 521 from the circular region indicated by the broken line on the inner surface 521a of the inner cylinder (first panel) 521. Then, the light incident on the inner cylinder (first panel) 521 is diffused in the inner cylinder (first panel) 521, and the light enters the inner cylinder (first panel) 521 from the white region of the outer surface 521b of the inner cylinder (first panel) 521. 1st panel) It will be emitted to the outside of 521.

As described above, the panel portion 520 of the present embodiment has an inner cylinder (first panel) in which the first diffusing portion 81 for diffusing the transmitted light in at least the vertical direction (the first crossing direction intersecting one direction) is formed. ) 521, and the first diffusion portion 81 has a milky white portion. In the present embodiment, the entire inner cylinder (first panel) 521 is the first diffusion portion 81. Further, the entire inner cylinder (first panel) 521 is a milky white part. A milky white portion as the first diffusion portion 81 may be formed by forming a milky white light diffusing film or a milky white dot pattern on the surface of the panel having light transmission.

Further, the first diffusion portion 81 forms an inner cylinder (first panel) 521 formed by using a panel having a wavy uneven portion formed along the vertical direction (first crossing direction) and having light transmission. The formed inner cylinder (first panel) 521 may be used. That is, the first diffusion portion 81 may have a concavo-convex portion formed in a wavy shape along the vertical direction (first crossing direction). The shape of the uneven portion can be a curved wavy shape, a pulse wavy shape, a sawtooth shape, a V-shaped shape, or the like. By appropriately setting the wavelength (length), amplitude (height), panel thickness, etc. of the wavy uneven portion, the emitted region of the transmitted light can be set as a desired region.

Further, the inner cylinder (first panel) 521 formed by using a translucent panel such as frosted glass or template glass may be used as the inner cylinder (first panel) 521 on which the first diffusion portion 81 is formed. That is, the first diffusion portion 81 may have a translucent portion.

It is also possible to combine the uneven portion and the opalescent portion to form the first diffusion portion 81, or to combine the uneven portion and the translucent portion to form the first diffusion portion 81. That is, the first diffusion portion 81 can have at least one of a wavy uneven portion, a milky white portion, and a translucent portion formed along the vertical direction (first crossing direction). ..

Further, in the present embodiment, the outer cylinder (second panel) 522 is formed by using a panel having a wavy uneven portion formed along the horizontal direction (second crossing direction) and having light transmission. .. By doing so, when the light is transmitted through the outer cylinder (second panel) 522, the light irradiation area is expanded in the horizontal direction (see FIG. 5). The circle shown by the broken line in FIG. 5 is an irradiation region of light transmitted through the inner cylinder (first panel) 521 and is an irradiation region of light before passing through the outer cylinder (second panel) 522. Further, the substantially elliptical boundary line (slightly blurred boundary line) of the white portion in FIG. 5 is an irradiation region of light transmitted through the inner cylinder (first panel) 521, and is an outer cylinder (second panel) 522. It is an irradiation area of light after passing through. That is, most of the light transmitted through the inner cylinder (first panel) 521 is incident on the outer cylinder (second panel) 522 from the area of the circle indicated by the broken line on the inner surface 522a of the outer cylinder (second panel) 522. It becomes. Then, the light incident on the outer cylinder (second panel) 522 is diffused by the uneven portion, and the light is diffused from the white region of the outer surface 522b of the outer cylinder (second panel) 522 to the outside of the outer cylinder (second panel) 522 (second panel). It will be emitted to the outside of the panel unit 520).

As described above, the panel portion 520 of the present embodiment has a second diffusion portion 82 formed which diffuses the transmitted light in at least the horizontal direction (the second intersection direction intersecting the one direction and the first intersection direction). A cylinder (second panel) 522 is provided. The second diffusion portion 82 has a wavy uneven portion formed along the horizontal direction (second crossing direction). The shape of the uneven portion can also be a curved wavy shape, a pulse wavy shape, a sawtooth shape, a V-shaped shape, or the like. Then, by appropriately setting the wavelength (length), amplitude (height), panel thickness, etc. of the wave-shaped uneven portion, the emitted region of the transmitted light can be set as a desired region.

Further, the outer cylinder (second panel) 522 having light transmission and formed by using the panel on which the opalescent portion is formed is used as the outer cylinder (second panel) 522 on which the second diffusion portion 82 is formed. May be good. That is, the second diffusion portion 82 may have a milky white portion. The second diffusion portion 82 having the milky white portion can be formed, for example, by forming an outer cylinder (second panel) 522 using a milky white acrylic resin in which a light diffusing material is dispersed.

A milky white portion as the second diffusion portion 82 may be formed by forming a milky white light diffusing film or a milky white dot pattern on the surface of the panel having light transmission.

Further, the outer cylinder (second panel) 522 formed by using a translucent panel such as frosted glass or template glass may be used as the outer cylinder (second panel) 522 on which the second diffusion portion 82 is formed. That is, the second diffusion portion 82 may have a translucent portion.

Further, it is also possible to form the second diffusion portion 82 by combining the uneven portion and the opalescent portion, or to form the second diffusion portion 82 by combining the uneven portion and the translucent portion. That is, it is possible for the second diffusion portion 82 to have at least one of a wavy uneven portion, a milky white portion, and a translucent portion formed along the horizontal direction (second crossing direction). ..

As described above, in the present embodiment, the light emitted from the light source unit 70 is collected from the inner cylinder (first panel) 521 on which the first diffusion unit 81 is formed and the outer cylinder (first panel) on which the second diffusion unit 82 is formed. 2 panels) 522 is transparent. By doing so, it is possible to irradiate the entire circumference of the lighting device 10 with light while reducing the number of LED light sources 71 (light source unit 70) used as much as possible. Further, as compared with the lighting device 100 shown in FIG. 6, light can be irradiated from a wide range of the outer cylinder (second panel) 522, which is the irradiation region of the lighting device 10 (see FIG. 7). That is, the irradiation light emitted to the outside can be dispersed in a wider range.

As a result, it is possible to suppress the formation of a bright region in a part of the irradiation region of the lighting device 10, and it is possible to irradiate the outside with vague light (soft light) as a whole.

As described above, if the lighting device 10 is configured as described above, even when a light source unit in which the emitted light has directivity in one direction is used, a natural arrangement such as an incandescent lamp or an HID lamp is used. You will be able to get light.

The lighting device 100 shown in FIG. 6 is different from the lighting device 10 according to the present embodiment in that it does not have an inner cylinder (first panel) 521.

As described above, the lighting device 10 according to the present embodiment transmits and diffuses the light source unit 70 having directivity to the outside in the radial direction (forward in one direction) and the light emitted from the light source unit 70. It includes a diffusion unit 80.

The diffusion unit 80 includes a first diffusion unit 81 that diffuses the transmitted light in the vertical direction (first intersection direction) that intersects the radial direction (one direction). Further, the diffusion unit 80 includes a second diffusion unit 82 that transmits the light transmitted through the first diffusion unit 81 and diffuses it in the horizontal direction (the second intersection direction intersecting the one direction and the first intersection direction). There is.

In this way, if the light emitted from the light source unit 70 is transmitted through the first diffusion unit 81 and the second diffusion unit 82, the irradiation light emitted to the outside can be dispersed in a wider range. become.

Further, in the present embodiment, the lighting device 10 includes an inner cylinder (first panel) 521 on which the first diffusion portion 81 is formed, an outer cylinder (second panel) 522 on which the second diffusion portion 82 is formed, and the like. It has.

In this way, if the first diffusion portion 81 is formed on the inner cylinder (first panel) 521 and the second diffusion portion 82 is formed on the outer cylinder (second panel) 522, the outside is irradiated with a simpler configuration. The irradiation light to be emitted can be dispersed in a wider range.

Further, in the present embodiment, the first diffusion portion 81 has at least one of a concavo-convex portion, a milky white portion, and a translucent portion formed in a wavy shape along the vertical direction (first crossing direction). ..

By doing so, the first diffusing portion 81 can be manufactured more easily, and the light can be more reliably diffused in the vertical direction (first crossing direction).

Further, in the present embodiment, the second diffusion portion 82 has at least one of a concavo-convex portion, a milky white portion, and a translucent portion formed in a wavy shape along the horizontal direction (second crossing direction). ..

By doing so, the second diffusing portion 82 can be manufactured more easily, and the light can be more reliably diffused in the horizontal direction (second crossing direction).

Further, in the present embodiment, a plurality of light source units 70 are provided.

In this way, the irradiation light emitted to the outside can be dispersed in a wider range.

Further, in the present embodiment, a plurality of light source units 70 are arranged in a circumferential shape.

In this way, it is possible to irradiate the entire circumference of the illuminating device 10 while dispersing the irradiation light radiated to the outside in a wider range.

Further, in the present embodiment, the diffusion unit 80 is arranged so as to surround the plurality of light source units 70 arranged in a circumferential shape.

By doing so, the light emitted from the light source unit 70 can be more reliably diffused by the diffusing unit 80, and the light is irradiated over the entire circumference of the lighting device 10 while reducing the number of the light source units 70 to be used as much as possible. You will be able to make it.

It is also possible to form the lighting device 10A by using the third panel 523 shown in FIG. The illuminating device 10A has almost the same configuration as the illuminating device 10 shown in the above embodiment except for the configuration of the panel portion 520.

In the third panel 523 shown in FIG. 8, a wavy uneven portion formed along the horizontal direction (first crossing direction) is formed on the inner surface 523a side (rear side in one direction: light source portion 70 side). This uneven portion functions as the first diffusion portion 81. Further, on the outer surface 523b side (front side in one direction; opposite side to the light source portion 70 side) of the third panel 523, a wavy uneven portion formed along the vertical direction (second crossing direction) is formed. , This uneven portion functions as a second diffusion portion 82.

As described above, the lighting device 10A shown in FIG. 8 includes a panel unit 520 having a third panel 523, and the light emitted from the light source unit 70 is transmitted through the panel unit 520 (third panel 523). As a result, it is diffused in the vertical direction and the horizontal direction.

The third panel 523 shown in FIG. 8 can be formed, for example, by integrally molding a translucent resin or the like. The third panel 523 is formed by providing uneven portions that function as the first diffusion portion 81 and the second diffusion portion 82, respectively, on both sides of one rectangular plate-shaped member having translucency, and bending the third panel 523 into a tubular shape. It may be formed. Further, the third panel 523 may be formed by superimposing two tubular members having substantially the same inner diameter on one side and the outer shape on the other side.

Further, the first diffusion portion 81 can have at least one of a wavy uneven portion, a milky white portion and a translucent portion formed along the horizontal direction (first crossing direction). .. Further, the second diffusion portion 82 can have at least one of a wavy uneven portion, a milky white portion and a translucent portion formed along the vertical direction (second crossing direction). ..

As described above, in the lighting device 10A shown in FIG. 8, the first diffusion unit 81 is formed on the inner surface 523a side (light source unit 70 side), and the second diffusion unit 81 is formed on the outer surface 523b side (opposite side to the light source unit 70 side). A third panel 523 on which 82 is formed is provided.

By doing so, the same operations and effects as those of the lighting device 10 shown in the above embodiment can be obtained. Further, in the case of the lighting device 10A shown in FIG. 8, one third panel 523 can be used to disperse the irradiation light emitted to the outside in a wider range, so that the configuration can be further simplified. ..

It is also possible to arrange a translucent panel formed separately from the third panel 523 so as to surround the entire circumference of the third panel 523. At this time, the panel to be positioned may or may not have a light diffusing function for diffusing the transmitted light.

Further, the concavo-convex portion formed in a wavy shape along the vertical direction may be formed on the inside of the third panel 523, and the concavo-convex portion formed in a wavy shape along the horizontal direction may be formed on the outside. That is, as in the above embodiment, the vertical direction may be the first crossing direction and the horizontal direction may be the second crossing direction.

Further, as shown in the above embodiment, in the lighting device 10 in which the inner cylinder 521 and the outer cylinder 522 form the panel portion 520, the horizontal direction is the first crossing direction and the vertical direction is the second crossing direction. May be good. Such a configuration can be obtained, for example, by using the panel constituting the outer cylinder 522 as the inner cylinder and the panel constituting the inner cylinder 521 as the outer cylinder.

Further, the panel unit 520 may include the first panel 521 and the second panel 522 shown in the above embodiment, and the third panel 523 shown in FIG. At this time, the arrangement order of each panel can be appropriately set.

Although the preferred embodiment of the present disclosure has been described above, the present embodiment is not limited to the above embodiment, and various modifications are possible.

For example, in the above-described embodiment and its modification, as the lighting device, an outdoor lighting device installed on the ground such as a garden or a garden (including a park) has been exemplified, but the lighting device is not limited thereto. For example, it can be a lighting device installed on an indoor floor surface or table surface. Further, it is possible to use a lighting device that is embedded in a wall such as a ceiling or under an eave, or a lighting device that is mounted in a state of being exposed from the wall.

Further, in the above-described embodiment and its modification, an example using four (plurality) light source units is illustrated, but a configuration using one light source unit is also possible. It is also possible to use two, three, five or more light source units. Further, when a plurality of light source units are used, it is not necessary to arrange the light source units in a circumferential shape, and the light source units can be arranged in a row or in a plane.

Further, in the above-described embodiment and its modification, an example in which the diffuser portion is arranged so as to surround the light source portion is illustrated, but the diffuser portion may be arranged at least in front of the irradiation direction of the light source portion, and is a light source. It is not necessary to arrange the parts so as to surround them.

Further, in the above embodiment, an example in which an LED light source is used as a light source unit is illustrated, but a semiconductor light source or the like can also be used.

In addition, the specifications (shape, size, layout, etc.) of the light source unit, panel unit, and other details can be changed as appropriate.

10,10A Lighting device 521 Inner cylinder (1st panel)
522 outer cylinder (second panel)
523 3rd panel 80 Diffusing part 81 1st diffusing part 82 2nd diffusing part 70 Light source part

Claims (5)

The emitted light have a directivity in one direction, a plurality of light source sections arranged circumferentially,
A diffuser that transmits and diffuses the light emitted from the light source
With
The diffuser
A first diffusing portion that diffuses the transmitted light in the first crossing direction that intersects the one direction,
A second diffusing portion that transmits light transmitted through the first diffusing portion and diffuses the light in the one direction and the second crossing direction that intersects the first crossing direction.
Equipped with a,
Lighting apparatus wherein the spreading unit, characterized that you have been arranged so as to surround the plurality of light source portions arranged circumferentially. The lighting device according to claim 1, further comprising a first panel on which the first diffusion portion is formed and a second panel on which the second diffusion portion is formed. The first or second aspect of the present invention comprises a third panel in which the first diffusion portion is formed on the light source portion side and the second diffusion portion is formed on the side opposite to the light source portion side. The lighting device described. Any of claims 1 to 3, wherein the first diffusion portion has at least one of a wavy uneven portion, a milky white portion, and a translucent portion formed along the first crossing direction. Or the lighting device according to item 1. Any of claims 1 to 4, wherein the second diffusion portion has at least one of a wavy uneven portion, a milky white portion, and a translucent portion formed along the second crossing direction. Or the lighting device according to item 1.

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