lighting fixtures

Abstract

To provide a luminaire in which the positions of a sunshine part and a shade part can be changed.SOLUTION: A luminaire 1 comprises: an appliance body 10 attached to an attachment object part, having a square shape and a box shape, and comprising engagement parts 12 provided on two opposed surfaces out of four side surfaces; and a lighting fixture unit 20 attached to the appliance body 10, having a square shape, and comprising engagement object parts 29 provided on four side surfaces, and engaged with the engagement parts 12. Two opposed engagement object parts 29 out of the engagement object parts 29 provided on the four side surfaces are engaged with the engagement parts 12, and thereby the lighting fixture unit 20 is attached to the appliance body 10.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a lighting fixture including a fixture body and a lamp unit. [Background technology]

[0002] Conventionally, lighting fixtures comprising a fixture body and a lighting unit have been known. Patent Document 1 discloses a lighting fixture in which the lighting unit attached to the fixture body comprises a first optical member, a second optical member, and a light-blocking portion. The first optical member has a scattering plate and a light-guiding plate that emit a first light. The second optical member emits a second light from the light-emitting surface of the diffusion plate. The light-blocking portion is provided between a first end face of the diffusion plate that is disposed on the side of the light-guiding plate that emits the light, and the light-guiding plate's light-emitting surface. In this way, Patent Document 1 aims to realize a lighting fixture that simulates sunny and shaded areas. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-26793 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the lighting fixture disclosed in Patent Document 1, the mounting direction of the fixture body and the lighting unit is unique, and therefore the positions of the sunny and shaded areas are also unique and cannot be changed.

[0005] The present disclosure has been made to solve the above-mentioned problems, and provides a lighting fixture that allows the positions of the sunny and shaded areas to be changed. [Means for solving the problem]

[0006] The lighting fixture according to the present disclosure comprises a rectangular, box-shaped fixture body attached to an attachment portion, the fixture body having engaging portions provided on two opposing sides of four sides, and a rectangular lighting unit attached to the fixture body, the rectangular fixture body having engaged portions provided on the four sides and engaging with the engaging portions, the lighting unit being attached to the fixture body by two opposing engaged portions of the engaged portions provided on the four sides engaging with the engaging portions, the engaging portions having an attachment portion attached to the side and a holding portion connected to the attachment portion and holding the engaged portions having grooves formed therein into which the engaged portions are inserted, The holding portion has a drop prevention portion that protrudes upward at the entrance of the groove to prevent the engaged portion from dropping after the engaged portion is inserted. [Effects of the Invention]

[0007] According to the present disclosure, the lighting unit is attached to the fixture body by engaging two opposing engaged portions, among the engaged portions provided on the four side surfaces, with the engaging portions. The orientation in which the lighting unit is attached to the fixture body is changed by switching the engaged portion that engages with the engaging portion. Therefore, if the lighting unit simulates sunny and shady areas, the positions of the sunny and shady areas can be changed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an assembled perspective view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 2] 1 is an exploded perspective view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 3] 1 is an exploded perspective view showing a lighting fixture according to a first embodiment of the present disclosure, viewed from below. [Figure 4] 1 is an exploded perspective view of a lighting fixture according to a first embodiment of the present disclosure, as viewed from the side. [Figure 5] 1 is a diagram illustrating a lighting fixture and an engaging portion according to a first embodiment of the present disclosure. [Figure 6] 1 is an exploded perspective view showing a lamp unit and a decorative cover according to a first embodiment of the present disclosure. [Figure 7]1 is an assembled perspective view showing a main body side holding member according to the first embodiment of the present disclosure. FIG. [Figure 8] FIG. 2 is an exploded perspective view showing a main body holding member according to the first embodiment of the present disclosure. [Figure 9] 1 is a diagram illustrating a lighting fixture according to a first embodiment of the present disclosure. [Figure 10] 1 is a diagram showing an installation mode of a lighting fixture according to a first embodiment of the present disclosure. [Figure 11] 1 is a diagram illustrating an installation mode of a lighting fixture according to a first embodiment of the present disclosure, and is a diagram illustrating the inside of the lighting fixture. FIG. [Figure 12] 1 is a diagram showing an installation mode of a lighting fixture according to a first embodiment of the present disclosure. [Figure 13] 1 is a diagram illustrating an installation mode of a lighting fixture according to a first embodiment of the present disclosure, and is a diagram illustrating the inside of the lighting fixture. FIG. [Figure 14] 1 is a diagram showing an installation mode of a lighting fixture according to a first embodiment of the present disclosure. [Figure 15] 1 is a diagram illustrating an installation mode of a lighting fixture according to a first embodiment of the present disclosure, and is a diagram illustrating the inside of the lighting fixture. FIG. [Figure 16] 1 is a diagram illustrating a lighting state of a lighting device according to a first embodiment of the present disclosure. [Figure 17] 1 is an assembled perspective view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 18] 1 is an exploded perspective view showing a lighting fixture according to a first embodiment of the present disclosure. [Figure 19] 3A and 3B are diagrams illustrating a removal prevention part according to the first embodiment of the present disclosure. [Figure 20] FIG. 10 is a side view showing a lighting fixture according to a second embodiment of the present disclosure. [Figure 21] FIG. 10 is a perspective view showing an installation mode of a lighting fixture according to a second embodiment of the present disclosure. [Figure 22] FIG. 10 is a diagram showing an installation mode of a lighting fixture according to a second embodiment of the present disclosure. [Figure 23] FIG. 10 is an enlarged view showing an installation mode of a lighting fixture according to a second embodiment of the present disclosure. [Figure 24]FIG. 10 is a diagram showing an installation mode of a lighting fixture according to a second embodiment of the present disclosure. [Figure 25] FIG. 10 is a diagram showing an installation mode of a lighting fixture according to a second embodiment of the present disclosure. [Figure 26] 10A and 10B are diagrams illustrating a lighting fixture and an engaging portion according to a third embodiment of the present disclosure. [Figure 27] 10A and 10B are diagrams illustrating an engaging portion according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of a lighting device according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the embodiments described below. Furthermore, in the following drawings, including FIG. 1, the size relationships between the components may differ from the actual size relationships. Furthermore, in the following description, terms indicating directions are used as appropriate to facilitate understanding, but these terms are for explanatory purposes and do not limit the present disclosure. Examples of terms indicating directions include "up," "down," "right," "left," "front," and "rear."

[0010] Embodiment 1 FIG. 1 is an assembled perspective view of a lighting fixture 1 according to a first embodiment of the present disclosure, and FIG. 2 is an exploded perspective view of the lighting fixture 1 according to the first embodiment of the present disclosure. FIG. 3 is an exploded perspective view of the lighting fixture 1 according to the first embodiment of the present disclosure as viewed from below, and FIG. 4 is an exploded perspective view of the lighting fixture 1 according to the first embodiment of the present disclosure as viewed from the side. As shown in FIGS. 1 to 4, the lighting fixture 1 is attached to a mounting portion 2, such as a ceiling or a wall, and emits light. The mounting portion 2 has an embedding hole 3 formed therein into which the lighting fixture 1 is embedded. The mounting portion 2 is provided with a plurality of bolts 4 for mounting the lighting fixture 1, and a power line 5 and a signal line 6 extend through the mounting portion 2. The power line 5 supplies power, and the signal line 6 transmits control signals. In the first embodiment, an example is illustrated in which the lighting fixture 1 simulates a sunny area 7 and a shaded area 8. The lighting fixture 1 includes a fixture main body 10, a lamp unit 20, and a decorative cover 30.

[0011] (Apparatus body 10) The fixture body 10 is attached to the attachment portion 2 and includes a body frame 11, an engagement portion 12, a spring receiving portion 13, and a terminal block 14.

[0012] (Main frame 11) The main body frame 11 is rectangular and box-shaped. The main body frame 11 has a square bottom surface 11a that is attached to the attachment portion 2, and four rectangular side surfaces 11b that extend from the four sides of the bottom surface 11a toward the irradiation side. That is, the main body frame 11 is a rectangular parallelepiped that is square when viewed from the front and rectangular when viewed from the side. The surface of the main body frame 11 that faces the bottom surface 11a is open.

[0013] (Engagement portion 12) FIG. 5 is a diagram illustrating a lighting fixture 1 and an engaging portion 12 according to the first embodiment of the present disclosure. FIG. 5(a) is a diagram illustrating a state in which the lighting unit 20 is attached to the fixture body 10, and FIG. 5(b) is a diagram illustrating the engaging portion 12. As shown in FIGS. 5(a) and 5(b), the engaging portions 12 are provided on two opposing sides of the four side surfaces 11b of the main body frame 11. Two engaging portions 12 are provided on each of the two side surfaces 11b. The engaging portions 12 are trapezoidal in shape and include an attachment portion 41 and a holding portion 43. The attachment portions 41 form the upper and lower sides of the trapezoid and are attached to the side surfaces 11b of the main body frame 11 with rivets 42.

[0014] Two rivets 42 are provided on the upper side and two on the lower side. The holding portion 43 holds the engaged portion 29 of the lighting unit 20, and is a member bent into a U-shape that is connected to the two mounting portions 41 between them. An L-shaped groove 44 is formed in the holding portion 43, and the engaged portion 29 is inserted into the groove 44. An entrance 45 of the groove 44 in the holding portion 43 is formed with an opening that is larger than the engaged portion 29. This makes it easier for the engaged portion 29 to be inserted into the groove 44.

[0015] The holding portion 43 has a fall prevention portion 46. The fall prevention portion 46 protrudes upward at the entrance 45 of the groove 44 to prevent the engaged portion 29 from falling after the engaged portion 29 is inserted. FIG. 5 shows a position L1 of the engaged portion 29 when the engaged portion 29 begins to be inserted into the groove 44. Furthermore, a notch 47 is formed at the back of the groove 44 of the holding portion 43 so that the engaged portion 29 can fit into it. FIG. 5 shows a position L2 of the engaged portion 29 when the engaged portion 29 is fitted into the notch 47.

[0016] (Spring support part 13) The spring receiving portions 13 receive the V springs 32 of the decorative cover 30 and are provided on the side surface 11b where the engaging portions 12 are provided. The spring receiving portions 13 are provided on the side surface 11b above and below each engaging portion 12. The spring receiving portions 13 are formed with holes into which the tips of the V springs 32 are inserted.

[0017] (terminal block 14) The terminal block 14 is provided on the bottom surface 11a of the main body frame 11 and consists of a power terminal block 14a and a signal terminal block 14b. A power line 5 extending through the mounting portion 2 is connected to the power terminal block 14a. A signal line 6 extending through the mounting portion 2 is connected to the signal terminal block 14b. A harness 9 (see Figure 18) is connected to the power terminal block 14a and the signal terminal block 14b.

[0018] (Lighting unit 20) Fig. 6 is an exploded perspective view showing the lighting unit 20 and the decorative cover 30 according to the first embodiment of the present disclosure. As shown in Figs. 2 to 4, the lighting unit 20 has a rectangular shape and is attached to the fixture body 10, and emits light. As shown in Fig. 6, the lighting unit 20 has a body-side holding member 21, a light guide plate 22, a diffusion cover 23, a packing 24, an irradiation-side holding member 25, a power supply device 26 (see Fig. 4), a first light-emitting portion 27, a second light-emitting portion 28, and an engaged portion 29.

[0019] (Main body side holding member 21) Fig. 7 is an assembled perspective view showing the body-side holding member 21 according to the first embodiment of the present disclosure, and Fig. 8 is an exploded perspective view showing the body-side holding member 21 according to the first embodiment of the present disclosure. As shown in Figs. 7 and 8, the body-side holding member 21 is attached to the fixture body 10 and includes a lamp frame 51, a scattering plate 52, a reflective sheet 53, a light-shielding sheet 54, and a support portion 55. The lamp frame 51 is a member in which a square, frame-shaped opening is formed, and the first light-emitting portion 27 is provided.

[0020] The scattering plate 52 is provided in the lamp frame 51 and scatters light. The scattering plate 52 is a square, plate-like member provided in the opening of the lamp frame 51. The reflective sheet 53 is provided on the lamp frame 51 on the opposite side of the lighting fixture body 10 from the scattering plate 52 and reflects light. The reflective sheet 53 is a square, sheet-like member provided in the opening of the lamp frame 51. The shading sheet 54 is a pair of sheet-like members extending in the longitudinal direction and blocks light. The shading sheet 54 is provided in the lamp frame 51 so as to correspond to the portion where the first light-emitting unit 27 is provided.

[0021] (Support part 55) The support portion 55 is a square, frame-shaped member that presses the reflective sheet 53 against the scattering plate 52, and holds the scattering plate 52 and the reflective sheet 53. The support portion 55 is made up of two first support portions 56 and two second support portions 57. The first support portion 56 is a plate-shaped member that extends in the longitudinal direction, and is provided so as to correspond to a portion of the lamp frame 51 where the first light-emitting portion 27 is not provided. The second support portion 57 is a plate-shaped member that extends in the longitudinal direction, and is provided so as to correspond to a portion of the lamp frame 51 where the first light-emitting portion 27 is provided.

[0022] A conventional technique is known in which the four edges of the reflective sheet 53 are secured with adhesive. In this case, the adhesive may lose its adhesive strength or discolor over time due to deterioration. A decrease in adhesive strength may increase or decrease the gap between the scattering plate 52 and the reflective sheet 53, resulting in uneven light emitted from the scattering plate 52. Furthermore, discoloration of the adhesive may cause the color of the light emitted from the scattering plate 52 to change partially. Another conventional technique is known in which two opposing edges of the reflective sheet 53 are secured. In this case, when the lighting fixture 1 is mounted on a wall and placed vertically, the scattering plate 52 and the reflective sheet 53 are also placed vertically. This may cause the reflective sheet 53 to bend, increasing or decreasing the gap between the scattering plate 52 and the reflective sheet 53, resulting in uneven light.

[0023] In contrast, in the first embodiment, the first support portion 56 and the second support portion 57 press the four sides of the reflective sheet 53 against the scattering plate 52. As a result, the four sides of the reflective sheet 53 are sandwiched between the scattering plate 52 and the first support portion 56 or the second support portion 57, so that the reflective sheet 53 is less likely to bend even if the mounting direction of the scattering plate 52 and the reflective sheet 53 changes. Furthermore, because the four sides of the reflective sheet 53 are held, the reflective sheet 53 is less likely to bend even if the mounting direction of the lighting unit 20 to the fixture body 10 changes. Furthermore, because the reflective sheet 53 is pressed against the scattering plate 52, a small gap is created between the scattering plate 52 and the reflective sheet 53. As a result, light reflected by the reflective sheet 53 can be efficiently returned to the scattering plate 52, and the gap can reproduce light like that of a blue sky.

[0024] (Light guide plate 22) 6, the light guide plate 22 is provided on the main body side holding member 21 and serves to guide light. The light guide plate 22 is a square, sheet-like member.

[0025] (Diffusion Cover 23) 6, the diffusion cover 23 is provided on the main body side holding member 21 and diffuses light. The diffusion cover 23 is a square, frame-shaped member that widens from the fixture main body 10 side toward the decorative cover 30 side.

[0026] (Packing 24) The packing 24 is interposed between the light guide plate 22 and the diffusion cover 23, and determines the position of the diffusion cover 23 relative to the light guide plate 22 while blocking light. The packing 24 is disposed between the lower surface of the light guide plate 22 and the upper end face of the diffusion cover 23. The packing 24 functions as a light-blocking section between the lower surface of the light guide plate 22 and the upper end face of the diffusion cover 23. The packing 24 blocks light from entering the upper end of the diffusion cover 23 from the exit surface of the light guide plate 22, which glows blue due to the light emitted from the first light-emitting section 27.

[0027] The packing 24 prevents the white light emitted from the second light-emitting unit 28 from entering the lower exit surface of the light guide plate 22 from the upper end surface of the diffusion cover 23. If the packing 24 is white, it tends to reflect the white light, which may cause the white light to enter the lower exit surface of the light guide plate 22. For this reason, the color of the packing 24 is preferably a color with low reflectivity, such as black or gray. Note that if the packing 24 is black, it tends to absorb light, which may reduce the luminous efficiency. For this reason, it is more preferable that the color of the packing 24 be gray, which has a good balance between reflectivity and light absorption. The thickness of the packing 24 is preferably thin, from the viewpoint of preventing the user from noticing the boundary between the exit surface of the light guide plate 22 and the light-emitting surface of the diffusion cover 23.

[0028] On the other hand, packing 24 also functions as a buffer when lighting device 1 is shaken by an earthquake or the like. For this reason, packing 24 is preferably thick enough to absorb and suppress vibrations caused by shaking such as an earthquake. Therefore, packing 24 is preferably made of an elastic material that makes the boundary between the exit surface of light guide plate 22 and the light-emitting surface of diffusion cover 23 inconspicuous and has a thickness that can suppress vibrations caused by shaking such as an earthquake.

[0029] The packing 24 functions to fix the position of the diffusion cover 23 relative to the light guide plate 22. When the lighting fixture 1 is installed on a wall or the like, the diffusion cover 23 is placed below the irradiation-side holding member 25. The center of gravity of the diffusion cover 23 is located closer to the light guide plate 22 than the contact point between the lower end surface of the diffusion cover 23 and the irradiation-side holding member 25 in the direction in which the light guide plate 22 and the diffusion cover 23 face each other. Therefore, the diffusion cover 23 may rotate toward the light guide plate 22 around the placement portion of the irradiation-side holding member 25 due to its own weight and come into contact with the light guide plate 22. Furthermore, if the light guide plate 22 comes into contact with the end surface of the diffusion cover 23 irradiated with light emitted from the second light-emitting unit 28, the exit surface of the light guide plate 22, which normally glows blue, may glow white.

[0030] Therefore, the packing 24 is disposed between the exit surface of the light guide plate 22 and the end surface of the diffusion cover 23. In this way, the packing 24 has a function of supporting the diffusion cover 23 when the diffusion cover 23 tilts toward the light guide plate 22. Furthermore, when the packing 24 is an elastic body having a certain thickness, it has a function of pressing the diffusion cover 23 against the irradiation-side holding member 25 to fix the position of the diffusion cover 23 relative to the light guide plate 22. In the first embodiment, the case where the packing 24 is disposed between the light guide plate 22 and the diffusion cover 23 has been exemplified, but the packing 24 and the light-shielding sheet 54 may also be disposed between the light guide plate 22 and the diffusion cover 23.

[0031] FIG. 9 is a diagram illustrating the lighting device 1 according to the first embodiment of the present disclosure. Here, unlike FIG. 9 , a case will be described in which the packing 24 is not provided between the diffusion cover 23 and the light guide plate 22. The illumination-side holding member 25 supports the diffusion cover 23 in a direction away from the light guide plate 22, but does not support the diffusion cover 23 in a direction toward the light guide plate 22. Furthermore, because the center of gravity G of the diffusion cover 23 is closer to the light guide plate 22 than the contact point with the illumination-side holding member 25, a rotational moment is generated in a direction that causes the diffusion cover 23 to tip toward the light guide plate 22. Furthermore, because there is no support for the diffusion cover 23, there is a risk that the diffusion cover 23 will tip toward the light guide plate 22. Therefore, it is desirable to prevent the diffusion cover 23 from tipping toward the light guide plate 22.

[0032] The diffusion cover 23 rotates around the contact point between the lower end of the diffusion cover 23 and the irradiation-side holding member 25, which serves as a fulcrum. In the direction in which the light guide plate 22 and the diffusion cover 23 face each other, the contact point between the diffusion cover 23 and the irradiation-side holding member 25 is located farther from the light guide plate 22 than the position of the center of gravity G of the diffusion cover 23, so the diffusion cover 23 rotates toward the light guide plate 22. The irradiation-side holding member 25 or the main-body-side holding member 21 does not have a support that prevents the diffusion cover 23 from tipping over. There is also no support that prevents the diffusion cover 23 from tipping over in the space surrounded by the irradiation-side holding member 25, the main-body-side holding member 21, and the diffusion cover 23. Note that there are no supports that prevent the diffusion cover 23 from tipping over not only on the lower side of the diffusion cover 23, but also on the upper and side sides of the diffusion cover 23.

[0033] 9, in the first embodiment, a packing 24 is provided between the diffusion cover 23 and the light guide plate 22. This prevents the diffusion cover 23 from collapsing toward the light guide plate 22. In addition, if the packing 24 is an elastic member and has thickness, the diffusion cover 23 can be pressed against the irradiation-side holding member 25.

[0034] (Irradiation side holding member 25) As shown in Fig. 6, the illumination-side holding member 25 is attached to the main body-side holding member 21 and holds the second light-emitting unit 28. The illumination-side holding member 25 is a square, frame-shaped member. Engaged portions 29 are provided on four sides of the illumination-side holding member 25. When the lighting unit 20 is attached to the fixture main body 10, the illumination-side holding member 25 is disposed at a distance from the side surface 11b of the fixture main body 10 in the direction in which the engaged portions 29 protrude from the illumination-side holding member 25.

[0035] (Power supply unit 26) As shown in FIG. 4, the power supply device 26 is attached to the outside of the irradiation side holding member 25 and the main body side holding member 21, and supplies power to the first light-emitting unit 27 and the second light-emitting unit 28.

[0036] (First light-emitting unit 27) The first light-emitting unit 27 is, for example, a blue LED module in which blue LEDs are arranged in a line and extending in the longitudinal direction. A pair of first light-emitting units 27 is provided in the main body-side holding member 21 so as to correspond to the portion where the light-shielding sheet 54 is provided.

[0037] (Second light-emitting unit 28) The second light-emitting section 28 is, for example, a white LED module in which white LEDs are arranged in a line and which extends in the longitudinal direction. The second light-emitting section 28 is provided on two adjacent surfaces of the irradiation-side holding member 25.

[0038] Light from the first light-emitting unit 27 is guided by the light guide plate 22, and blue light is projected onto the scattering plate 52. The blue light imitates the light of the blue sky. White light is projected onto two surfaces of the diffusion cover 23 by the light from the second light-emitting unit 28. Note that a light-blocking material is attached to the remaining two surfaces of the diffusion cover 23, preventing light from passing through. This allows the lighting fixture 1 to simulate the condition in which sunlight is shining in through a window.

[0039] (engaged portion 29) As shown in FIGS. 3 and 4 , the engaged portions 29 are provided on four sides of the irradiation-side holding member 25 and engage with the engaging portions 12. Two engaged portions 29 are provided on each of the four sides of the irradiation-side holding member 25. The engaged portions 29 are, for example, shoulder screws that are not threaded near the screw head, and protrude from the irradiation-side holding member 25 in a direction away from the irradiation-side holding member 25. As shown in FIG. 5 , the engaged portions 29 engage with the engaging portions 12. The engaged portions 29 enter through the entrance 45 of the groove 44 of the engaging portion 12 and reach a depth deeper than the fall prevention portions 46. Because the fall prevention portions 46 extend upward beyond the engaged portions 29, the engaged portions 29 are prevented from falling from the groove 44. The engaged portions 29 enter from the depth of the fall prevention portions 46 further into the groove 44 and fall into the notches 47. As a result, the engaged portions 29 fit into the notches 47. As a result, the engaged portion 29 engages with the engaging portion 12 .

[0040] (Cosmetic cover 30) As shown in FIGS. 3 and 4, the decorative cover 30 is detachably attached to the appliance body 10, and includes a decorative frame 31, a V-spring 32, and a transparent plate 33.

[0041] (Decorative frame 31) The decorative frame 31 is a component with a square, frame-shaped opening that is attached to the lighting unit 20. The decorative frame 31 widens from the fixture body 10 side toward the lighting direction. A flange portion 31a that extends toward the lighting unit 20 side is provided on the back surface of the decorative frame 31 (see FIG. 6). The decorative surface of the decorative frame 31 may be painted in any color, and may be provided with any pattern or decoration such as a wood grain pattern.

[0042] (V spring 32) The V springs 32 are V-shaped elastic members attached to the decorative frame 31. The V springs 32 are received in the spring receiving portions 13 of the appliance body 10, and two V springs 32 are provided on each of two opposing sides of the decorative frame 31. When inserted into the spring receiving portions 13, the V springs 32 are inserted into the holes of the spring receiving portions 13 in a compressed state, tip first. The V springs 32 are also simply referred to as elastic members.

[0043] (Transparent plate 33) The transparent plate 33 is a square, plate-like transparent member that covers the scattering plate 52 of the lighting unit 20. The transparent plate 33 is provided so as to cover the opening of the decorative frame 31. The transparent plate 33 is made of, for example, glass, but may also be tempered glass or a transparent film. The transparent plate 33 may also be a member in which multiple films are laminated. Furthermore, the transparent plate 33 may also be made of a coating agent that coats the surface of the scattering plate 52. In the first embodiment, the transparent plate 33 is separated from the scattering plate 52, but the transparent plate 33 may also be attached to the light-emitting surface of the scattering plate 52.

[0044] (Installation of lighting fixture 1) FIG. 10 is a diagram illustrating an installation mode of the lighting fixture 1 according to the first embodiment of the present disclosure. FIG. 11 is a diagram illustrating an installation mode of the lighting fixture 1 according to the first embodiment of the present disclosure, and is a diagram illustrating the interior of the lighting fixture 1. Next, the installation mode of the lighting fixture 1 will be described. As shown in FIGS. 10 and 11, the fixture body 10, the lighting unit 20, and the decorative cover 30 are arranged. First, the fixture body 10 is inserted into the embedding hole 3 of the mounting portion 2, and the fixture body 10 is mounted to the mounting portion 2 with a plurality of bolts 4 (see FIG. 2).

[0045] FIG. 12 is a diagram illustrating an installation mode of the lighting fixture 1 according to the first embodiment of the present disclosure. FIG. 13 is a diagram illustrating an installation mode of the lighting fixture 1 according to the first embodiment of the present disclosure, illustrating the interior of the lighting fixture 1. Next, the engaged portion 29 of the lighting unit 20 is inserted into the groove 44 of the engaging portion 12 of the fixture body 10, and the lighting unit 20 is pushed toward the fixture body 10. At this time, the engaged portion 29 is inserted to the innermost portion of the groove 44 of the engaging portion 12, and then slides downward and fits into the notch 47 of the groove 44 (see FIG. 5). As a result, the lighting unit 20 is fixed to the fixture body 10, as shown in FIGS. 12 and 13.

[0046] FIG. 14 is a diagram illustrating an installation mode of the lighting fixture 1 according to the first embodiment of the present disclosure. FIG. 15 is a diagram illustrating an installation mode of the lighting fixture 1 according to the first embodiment of the present disclosure, illustrating the interior of the lighting fixture 1. Thereafter, the V springs 32 of the decorative cover 30 are constricted. For example, an operator may constrict the V springs 32 by pressing the V springs 32 with their thumb and index finger. In this state, the tips of the V springs 32 are inserted into the spring receiving portions 13 through the gap between the side portions 11b of the fixture body 10 and the irradiation-side holding member 25. After the tips of the V springs 32 are inserted into the spring receiving portions 13, the fingers are released from the V springs 32, causing the V springs 32 to expand. This temporarily fastens the decorative cover 30 to the fixture body 10. In this state, when the decorative cover 30 is pushed into the fixture body 10, the V springs 32 further expand and engage with the spring receiving portions 13. As a result, the decorative cover 30 is attached to the appliance body 10 as shown in FIGS.

[0047] (Orientation of lighting unit 20) FIG. 16 illustrates lighting states of the lighting device 1 according to the first embodiment of the present disclosure. FIG. 16(a) illustrates a first lighting state, and FIG. 16(b) illustrates a second lighting state. In FIGS. 16(a) and 16(b), the shaded areas indicate shaded areas 8. As shown in FIG. 16(a), in the first lighting state, the right and lower sides of the diffusion cover 23 form sunny areas 7, and the left and upper sides of the diffusion cover 23 form shaded areas 8. As shown in FIG. 16(b), in the second lighting state, the left and lower sides of the diffusion cover 23 form sunny areas 7, and the right and upper sides of the diffusion cover 23 form shaded areas 8. In the lighting device 1, the positions of the sunny areas 7 and the shaded areas 8 are changed by rotating the orientation of the lighting unit 20 by 90 degrees. In other words, the direction of sunlight can be changed.

[0048] Next, a manner in which the orientation of the lighting unit 20 is changed will be described. After the lighting unit 20 is attached to the fixture body 10, the positions of the sunny portion 7 and the shaded portion 8 may be changed. In this case, the positions of the sunny portion 7 and the shaded portion 8 can be changed by changing the orientation of the lighting unit 20. First, the decorative cover 30 is pulled and removed from the fixture body 10. This is done by narrowing the V-spring 32, disengaging the V-spring 32 from the spring receiving portion 13, and removing the decorative frame 31 from the fixture body 10. Next, the lighting unit 20 is slid upward, and the engaged portion 29 is disengaged from the notch 47 of the groove 44 of the engaging portion 12. Then, by pulling the lighting unit 20 toward itself, the engaged portion 29 slides in the groove 44 of the engaging portion 12, and the lighting unit 20 is removed from the fixture body 10.

[0049] The removed lighting unit 20 is rotated 90°, and the engaged portion 29 is inserted into the groove 44 of the engaging portion 12. This attaches the lighting unit 20 to the fixture body 10. Then, the V spring 32 of the decorative cover 30 is narrowed. The tip of the V spring 32 is inserted into the spring receiving portion 13. After the tip of the V spring 32 is inserted into the spring receiving portion 13, when the finger is released from the V spring 32, the V spring 32 expands. This temporarily attaches the decorative cover 30 to the fixture body 10. In this state, when the decorative cover 30 is pushed into the fixture body 10, the V spring 32 expands further and engages with the spring receiving portion 13. This attaches the decorative cover 30 to the fixture body 10.

[0050] In this way, the lighting unit 20 can be rotated and attached to the fixture body 10, so that the positions of the sunny portion 7 and the shaded portion 8, which are arranged adjacent to each other, can be changed. That is, the lighting unit 20 is attached to the fixture body 10 by engaging two opposing engaged portions 29, of the engaged portions 29 provided on the four side surfaces 11b, with the engaging portions 12. Specifically, the orientation of the lighting unit 20 attached to the fixture body 10 can be changed by switching the two engaged portions 29, of the engaged portions 29 provided on the four side surfaces 11b, that engage with the engaging portions 12 to the other two engaged portions 29. Furthermore, even if a pattern or other display is drawn on the sunny portion 7, the orientation of the display can be changed.

[0051] Fig. 17 is an assembled perspective view showing the lighting fixture 1 according to the first embodiment of the present disclosure, and Fig. 18 is an exploded perspective view showing the lighting fixture 1 according to the first embodiment of the present disclosure. Next, with reference to these figures, the harness 9 will be described. As shown in Figs. 17 and 18, the harness 9 is connected to the power terminal block 14a and the signal terminal block 14b and transmits power and signals. The harness 9 extends downward from the power terminal block 14a and the signal terminal block 14b, bends at the lower side surface 11b of the fixture body 10, and extends further downward.

[0052] (detachment prevention part 11c) 19 is a diagram showing a detachment prevention portion 11c according to the first embodiment of the present disclosure. As shown in FIG. 19, the detachment prevention portion 11c is provided on the side surface 11b of the device body 10. The detachment prevention portion 11c is an L-shaped member protruding from the side surface 11b, and is provided adjacent to the position where the harness 9 is wired on the side surface 11b. The detachment prevention portion 11c is provided adjacent to the harness 9, thereby preventing the harness 9 from being detached from the device body 10.

[0053] According to the first embodiment, the lighting unit 20 is attached to the fixture body 10 by engaging two opposing engaged portions 29, of the engaged portions 29 provided on the four side surfaces 11b, with the engaging portions 12. By switching the engaged portions 29 that engage with the engaging portions 12, the orientation in which the lighting unit 20 is attached to the fixture body 10 is changed. Therefore, if the lighting unit 20 is designed to simulate a sunny portion 7 and a shady portion 8, the positions of the sunny portion 7 and the shady portion 8 can be changed.

[0054] Furthermore, according to the first embodiment, the transparent plate 33 covers the scattering plate 52. Therefore, even when the lighting fixture 1 is cleaned, the surface of the transparent plate 33, not the surface of the scattering plate 52, is cleaned. That is, because the scattering plate 52 is protected by the transparent plate 33, scratches on the surface of the scattering plate 52 can be prevented. Furthermore, after the lighting unit 20 is attached to the fixture body 10, the decorative cover 30 is attached to close the opening of the fixture body 10. This prevents dust and other particles from entering the interior of the fixture body 10. Therefore, the light-emitting surface of the scattering plate 52 can be prevented from becoming dirty. This eliminates the need to clean the scattering plate 52, and scratches on the surface of the scattering plate 52 can be prevented. Furthermore, because the scattering plate 52 is covered by the transparent plate 33, the light extraction efficiency is less likely to deteriorate. Furthermore, direct contact by the user with the surface of the scattering plate 52 can be prevented.

[0055] 17, in the lighting fixture 1, the V-spring 32 of the decorative cover 30 can be inserted into and engaged with the spring receiving portion 13 through the gap between the side surface 11b of the fixture body 10 and the irradiation-side holding member 25 of the lamp unit 20, and the decorative cover 30 can be attached to and detached from the fixture body 10 with the fixture body 10 attached to the mounting portion 2 and the lamp unit 20 attached to the fixture body 10. Therefore, the decorative cover 30 can be easily replaced with the fixture body 10 and the lamp unit 20 attached to the mounting portion 2.

[0056] That is, since the lighting fixture 1 can easily change the decorative cover 30 with a different design, the user has more freedom to change the design as desired. Furthermore, by packaging the lighting unit 20 and the decorative cover 30 separately, each decorative cover 30 can be traded individually, eliminating the need for inventory management of the lighting unit 20 and the decorative cover 30 as a single package, thereby reducing the burden of inventory management of the lighting unit 20. That is, the number of lighting units 20 in stock can be reduced, and warehouse storage space can be saved.

[0057] (First Modification) In the first embodiment, an example is given in which the fixture body 10 has the engaging portion 12, and the lighting unit 20 has the engaged portion 29. In the first modified example, the fixture body 10 has the engaged portion 29, and the lighting unit 20 has the engaging portion 12. In this case, the same effect as in the first embodiment is achieved. Furthermore, the engaged portion 29 may be a V-spring or the like instead of a shoulder screw.

[0058] (Second Modification) In the second modified example, the decorative cover 30 is omitted. In this case, the transparent plate 33 is made of, for example, glass, but may also be made of ultra-thin tempered glass or transparent film. The tempered glass or transparent film may be attached to the surface of the scattering plate 52. This prevents the surface of the scattering plate 52 from being scratched. The transparent plate 33 may also be a member made of multiple films laminated together. Furthermore, the transparent plate 33 may be made of a coating agent that coats the surface of the scattering plate 52. This prevents the surface of the scattering plate 52 from being scratched.

[0059] Embodiment 2 20 is a side view showing lighting fixture 1 according to embodiment 2 of the present disclosure. Embodiment 2 differs from embodiment 1 in that it includes main body hooking portion 10a and cover hooking portion 30a. In embodiment 2, parts common to embodiment 1 are assigned the same reference numerals and description thereof will be omitted, and the following description will focus on the differences from embodiment 1.

[0060] (Main body hook portion 10a) As shown in Figure 20, the appliance body 10 has body hooking portions 10a that protrude outward from the outer periphery, which is the four side surfaces 11b of the body frame 11. The body hooking portions 10a abut against the outer edge of the embedding hole 3 (see Figure 2) of the attachment portion 2, thereby preventing the body frame 11 from being inserted too far into the embedding hole 3 of the attachment portion 2. In addition, the body hooking portions 10a hook onto cover hooking portions 30a provided on the decorative cover 30.

[0061] (Cover hook portion 30a) The decorative cover 30 has a cover hook portion 30a that extends and protrudes outward from the outer periphery of the decorative frame 31. The cover hook portion 30a is hooked onto the main body hook portion 10a. When the cover hook portion 30a is hooked onto the main body hook portion 10a, the load of the decorative cover 30 is applied to the main body frame 11. Therefore, the load applied to the V spring 32 can be reduced.

[0062] (Installation of lighting fixture 1) As in the first embodiment, first, the fixture body 10 is inserted into the recessed hole 3 of the mounting portion 2, and then the fixture body 10 is attached to the mounting portion 2 with a plurality of bolts 4. Next, the engaged portion 29 of the lighting unit 20 is inserted into the groove 44 of the engaging portion 12 of the fixture body 10, and the lighting unit 20 is pushed toward the fixture body 10. At this time, the engaged portion 29 is inserted all the way into the innermost portion of the groove 44 of the engaging portion 12, and then slides downward and fits into the notch 47 of the groove 44. In this way, the lighting unit 20 is fixed to the fixture body 10.

[0063] FIG. 21 is a perspective view illustrating an installation mode of a lighting fixture 1 according to a second embodiment of the present disclosure, and FIG. 22 is a diagram illustrating the installation mode of the lighting fixture 1 according to the second embodiment of the present disclosure. FIG. 23 is an enlarged view illustrating the installation mode of the lighting fixture 1 according to the second embodiment of the present disclosure, illustrating an enlarged view of the circled portion in FIG. 21. Next, as shown in FIGS. 21 to 23, the cover hooking portion 30a of the decorative cover 30 is hooked onto the main body hooking portion 10a of the main body frame 11. At this time, the decorative cover 30 is tilted and brought close to the fixture main body 10 and the lighting unit 20, and the cover hooking portion 30a is hooked onto the main body hooking portion 10a. The decorative cover 30 has a transparent plate 33 and is therefore heavier than the decorative frame 31 alone. However, by hooking the cover hooking portion 30a onto the main body hooking portion 10a, the decorative cover 30 can be prevented from falling off the fixture main body 10 even if an unexpected event occurs, such as a slip of the hand.

[0064] 24 is a diagram illustrating an installation mode of lighting device 1 according to embodiment 2 of the present disclosure. After that, V spring 32 of decorative cover 30 is narrowed. For example, an operator narrows V spring 32 by pressing V spring 32 with the thumb and index finger. In this state, the tip of V spring 32 is inserted into spring receiving portion 13 as shown in FIG.

[0065] 25 is a diagram illustrating an installation mode of lighting fixture 1 according to embodiment 2 of the present disclosure. After the tip of V spring 32 is inserted into spring receiving portion 13, when a finger is released from V spring 32, V spring 32 spreads out. As a result, decorative cover 30 is temporarily fixed to fixture body 10. In this state, when decorative cover 30 is pushed into fixture body 10, V spring 32 spreads out further and engages with spring receiving portion 13. As a result, decorative cover 30 is attached to fixture body 10 as shown in FIG. 25.

[0066] According to the second embodiment, the appliance body 10 has a body hooking portion 10a extending outward from the outer periphery, and the decorative cover 30 has a cover hooking portion 30a extending outward from the outer periphery and hooking onto the body hooking portion 10a. When the cover hooking portion 30a hooks onto the body hooking portion 10a, the load of the decorative cover 30 is applied to the body frame 11. Therefore, the load applied to the V-spring 32 can be reduced.

[0067] Embodiment 3 Fig. 26 is a diagram showing lighting device 1 and engaging portion 12 according to embodiment 3 of the present disclosure, and Fig. 27 is a diagram showing engaging portion 12 according to embodiment 3 of the present disclosure. In embodiment 3, the shape of groove 44 of engaging portion 12 differs from embodiments 1 and 2. In embodiment 3, parts common to embodiments 1 and 2 are assigned the same reference numerals and description thereof will be omitted, and the following description will focus on the differences from embodiments 1 and 2.

[0068] As shown in Fig. 26, the fixture body 10 is attached to a mounting portion 2 such as a ceiling. The lighting unit 20 is lifted from the downward side to the upward side, and the engaged portion 29 of the lighting unit 20 is hooked onto the engaging portion 12 of the fixture body 10, thereby being held by the fixture body 10.

[0069] As shown in FIG. 27 , the innermost portion 48 of the notch 47 of the groove 44 extends downward in the direction of gravity. The innermost portion 48 extends toward the entrance 45, opposite the direction of extension of the groove 44 from the entrance 45. When the engaged portion 29 reaches the notch 47, it falls into the innermost portion 48 due to the influence of gravity. As a result, the engaged portion 29 is unlikely to come off the engaging portion 12 unless an external force acting upward against gravity is applied. Note that the shape of the notch 47 is not limited to this, and any shape may be used as long as the engaged portion 29 does not come off the engaging portion 12 in the direction of gravity. This allows the decorative cover 30 to be easily attached and detached in the lighting fixture 1 when the fixture body 10 and the lighting unit 20 are attached to the mounting portion 2 provided on the ceiling, just as when the lighting fixture 1 is embedded in a wall. [Explanation of symbols]

[0070] 1 lighting fixture, 2 mounting portion, 3 recessed hole, 4 bolt, 5 power line, 6 signal line, 7 sunny portion, 8 shaded portion, 9 harness, 10 fixture body, 10a body hook portion, 11 body frame, 11a bottom surface, 11b side surface, 11c anti-detachment portion, 12 engagement portion, 13 spring receiving portion, 14 terminal block, 14a power terminal block, 14b signal terminal block, 20 lighting fixture unit, 21 body side holding member, 22 light guide plate, 23 diffusion cover, 24 packing, 25 irradiation side holding member, 26 power supply unit, 27 first light-emitting portion, 28 second light-emitting portion, 29 engaged portion, 30 decorative cover, 30a cover hook portion, 31 decorative frame, 31a flange portion, 32 V-spring, 33 transparent plate, 41 mounting portion, 42 Rivet, 43 holding portion, 44 groove, 45 entrance, 46 fall prevention portion, 47 cutout, 48 innermost portion, 51 lighting fixture frame body, 52 scattering plate, 53 reflective sheet, 54 shading sheet, 55 support portion, 56 first support portion, 57 second support portion.

Claims

1. a rectangular, box-shaped tool body attached to the attachment portion and having engagement portions provided on two opposing sides of four side surfaces; a lamp unit attached to the fixture body, having a rectangular shape, and having engaged portions provided on four side surfaces and engaging with the engaging portions; The lighting unit comprises: The device is attached to the tool body by engaging two of the engaging portions provided on the four side surfaces with the engaging portions, The engagement portion is a mounting portion attached to the side surface; a holding portion connected to the attachment portion and holding the engaged portion, the holding portion having a groove formed therein into which the engaged portion is inserted; The holding portion is At the entrance of the groove, there is provided a drop prevention portion that protrudes upward to prevent the engaged portion from dropping after the engaged portion is inserted. Lighting fixtures.

2. A notch is formed at the back of the groove of the holding portion so that the engaged portion can fit into it, The deepest part of the notch extends downward in the direction of gravity.

2. The lighting fixture of claim 1.

3. a rectangular, box-shaped tool body attached to the attachment portion and having engagement portions provided on two opposing sides of four side surfaces; a lamp unit attached to the fixture body, having a rectangular shape, and having engaged portions provided on four side surfaces and engaging with the engaging portions; The lighting unit comprises: The device is attached to the tool body by engaging two of the engaging portions provided on the four side surfaces with the engaging portions, The lighting unit comprises: a body-side holding member attached to the instrument body; a light guide plate provided on the body side holding member to guide light; a diffusion cover provided on the main body side holding member for diffusing light; a packing interposed between the light guide plate and the diffusion cover, for blocking light and determining the position of the diffusion cover relative to the light guide plate; The main body side holding member is A lamp frame body, a scattering plate provided on the lamp frame for scattering light; a reflective sheet provided on the lighting fixture frame on the opposite side of the lighting fixture body from the scattering plate, the reflective sheet reflecting light; a support portion that presses the reflective sheet toward the scattering plate; Lighting fixtures.

4. a decorative cover having an elastic member attached to the appliance body; The lighting unit comprises: The device further includes an irradiation-side holding member that is attached to the main body-side holding member, is provided with a gap between the side surface of the device main body and the side surface of the device main body so that the elastic member can be inserted therein, and is provided with the engaged portion.

4. The lighting fixture according to claim 3.

5. The decorative cover is Removably attached to the instrument body 5. The lighting fixture according to claim 4.

Images