Luminaire

Abstract

To provide a luminaire capable of suppressing the leakage of light from a gap between an outer cover body and a holder holding the outer cover body when light transmitted through an inner cover body after emitted from a light source passes through the outer cover body.SOLUTION: A luminaire 1 includes a lighting part 2, an outer cover body 530, an inner cover body 550, and a holder 510. The lighting part 2 includes a light source 4. The outer cover body 530 allows light to pass therethrough, and the inner cover body 550 transmits light. The inner cover body 550 is interposed between the light source 4 and the outer cover body 530. The holder 510 is fixed to the lighting part 2 and holds the outer cover body 530. The holder 510 has a holding surface 590. The outer cover body 530 has a fixing surface 591 in contact with the holding surface 590. The fixing surface 591 includes a first face 591A, and a second face 591B having a step between itself and the first face 591A. The holding surface 590 has a shape to be fitted to the fixing surface 591.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture including a lighting unit having a light source unit and an outer cover body fixed to the lighting unit.

Background Art

[0002] Patent Document 1 describes a lighting fixture installed on a mounting surface such as an outdoor wall surface. This lighting fixture includes a lighting unit that houses and holds a light source, a socket, a thermal protector, and a socket cap inside. The lighting unit has a base portion, an inner case, an outer case, a terminal block, a packing, and a stat.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When light leaks from the gap between parts in the cover of the lighting fixture, this gap part may appear to glow from the outside, and the appearance of the lighting fixture may be impaired.

[0005] An object of the present disclosure is to provide a lighting fixture in which light leakage from a gap between an outer cover body and a holding body that holds the outer cover body can be suppressed when light emitted from a light source unit passes through the inner cover body and then passes through the outer cover body.

Means for Solving the Problems

[0006] The lighting fixture of the present disclosure includes a lighting unit, an outer cover body, an inner cover body, and a holding body. The lighting unit includes a light source unit that emits light toward the outside of the lighting unit. The outer cover body allows light to pass through. The inner cover body transmits light. The inner cover body is interposed between the light source unit and the outer cover body. The holding body is fixed to the lighting unit and holds the outer cover body. The holding body has a holding surface. The outer cover body has a fixing surface that contacts the holding surface. The outer periphery of the fixing surface has an exposed portion facing the outside of the lighting fixture and a non-exposed portion that is a portion other than the exposed portion. The fixing surface includes a first surface and a second surface having a step between the first surface. The holding surface has a shape that fits with the fixing surface.

Effect of the Invention

[0007] According to one aspect of the present disclosure, when the light emitted from the light source unit passes through the inner cover body and then passes through the outer cover body, it is possible to suppress light from leaking out through the gap between the outer cover body and the holding body that holds the outer cover body.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0009] Embodiments of the lighting fixture according to the present disclosure will be described with reference to FIGS. 1 to 12. Note that the following embodiments are only a part of various embodiments of the present disclosure. Also, the following embodiments can be variously modified according to the design and the like as long as the object of the present disclosure can be achieved.

[0010] All the figures referred to below are schematic figures, and the dimensional ratios of the components in the figures do not necessarily reflect the actual dimensional ratios.

[0011] 1. Overview The lighting fixture 1 according to the present embodiment includes a lighting unit 2, an outer cover body 530, an inner cover body 550, and a holding body 510. The lighting unit 2 includes a light source unit 4 that emits light toward the outside of the lighting unit 2. The outer cover body 530 allows light to pass through. The inner cover body 550 allows light to transmit. The inner cover body 550 is interposed between the light source unit 4 and the outer cover body 530. The holding body 510 is fixed to the lighting unit 2 and holds the outer cover body 530. The holding body 510 has a holding surface 590. The outer cover body 530 has a fixing surface 591 that contacts the holding surface 590. The outer periphery of the fixing surface 591 has an exposed portion 592A facing the outside of the lighting fixture 1 and a non-exposed portion 592B that is a portion other than the exposed portion 592A. The fixing surface 591 includes a first surface 591A and a second surface 591B having a step between the first surfaces 591A. The holding surface 590 has a shape that fits with the fixing surface 591.

[0012] According to this embodiment, when the light emitted from the light source unit 4 passes through the inner cover body 550 and then passes through the outer cover body 530, it is possible to suppress the leakage of light from the gap between the outer cover body 530 and the holding body 510. Therefore, the appearance of the lighting fixture 1 when the light source unit 4 emits light is less likely to be impaired.

[0013] Note that the outer cover body 530 allowing light to pass through means that the outer cover body 530 allows at least a part of the light reaching the outer cover body 530 to pass through. Also, the outer cover body 530 allowing light to pass through means that the outer cover body 530 allows light to pass through without changing the traveling direction of the light, or allows light to pass through by changing the traveling direction of the light (i.e., scattering the light). Also, the outer cover body 530 allowing light to pass through means that the outer cover body 530 allows at least a part of the light to be transmitted, or that the outer cover body 530 does not inhibit the traveling of at least a part of the light. The outer cover body 530 not inhibiting the traveling of light means, for example, that the outer cover body 530 has an opening or the like through which light can pass. The outer cover body 530 allowing light to be transmitted means, for example, that the outer cover body 530 is made of a material that can transmit light. The inner cover body 550 allowing light to be transmitted means, for example, that the inner cover body 550 is made of a material that can transmit light.

[0014] 2. Details The lighting fixture 1 of the embodiment will be described with reference to FIGS. 1 to 12. In the following description, the side of the cover body 5 with respect to the lighting unit 2 is defined as the front in the embodiment, and the side of the lighting unit 2 with respect to the cover body 5 is defined as the rear in the embodiment. Also, as will be described later, the lighting unit 2 in the embodiment includes an emergency light source unit 7, but the side on which the lens 70 of the emergency light source unit 7 is arranged with respect to the lighting unit 2 is defined as the lower side in the embodiment, and the side opposite to the lower side is defined as the upper side in the embodiment. Further, the right and left for the observer when the front, rear, upper, and lower in the above-described embodiment are regarded as the front, rear, upper, and lower for the observer are defined as the right and left in the embodiment. In the second and third embodiments as well, the front, rear, upper, lower, right, and left are defined in the same manner. Note that the front, rear, upper, lower, right, and left are for convenience in explaining the configuration of the lighting fixture 1 and do not define the orientation of the lighting fixture 1 when it is used. The arrow X in the drawing indicates the left side in the left-right direction, the arrow Y indicates the front side in the front-rear direction, and the arrow Z indicates the lower side in the up-down direction.

[0015] The lighting fixture 1 is, for example, attached to an outdoor wall surface such as around the entrance of a detached house or an apartment building and used. More specifically, the lighting fixture 1 is installed, for example, in the corridor of the common area of an apartment building or on the landing of a staircase, and serves as an emergency light and a staircase passage guiding light. Note that the use of the lighting fixture 1 is not limited to the above.

[0016] As shown in FIGS. 1 and 2, the lighting fixture 1 includes a lighting unit 2 and a cover body 5.

[0017] The lighting unit 2 includes a fixture body 200, a support member 3, a light source unit 4, an emergency power source 6, an emergency light source unit 7, and an emergency lighting device 8.

[0018] (1) Lighting unit First, the lighting unit 2 will be described (see FIGS. 2, 3, 11, and 12).

[0019] The fixture body 200 in the lighting unit 2 is a box-shaped member with an open front and an accommodation space S1 inside. In this embodiment, the fixture body 200 is made of aluminum die-cast. The fixture body 200 has two side walls 20 arranged side by side left and right so as to sandwich the accommodation space S1. Each of the two side walls 20 includes an inner wall portion 21 facing the accommodation space S1 and an outer wall portion 22 located outside the inner wall portion 21.

[0020] The fixture body 200 further has two second side walls 23, 24 arranged one above the other so as to sandwich the accommodation space S1, and a bottom wall 25 located behind the accommodation space S1. The bottom wall 25 is rectangular in a front view. Two side walls 20 protrude forward from the left and right sides of the bottom wall 25 respectively. One second side wall 23 protrudes forward from the upper side of the bottom wall 25, and the other second side wall 24 protrudes forward from the lower side of the bottom wall 25. That is, the second side wall 23 is the upper side wall protruding from the upper side of the bottom wall 25, and the second side wall 24 is the lower side wall protruding from the lower side of the bottom wall 25. The outer wall portions 22 of the two side walls 20 and the two second side walls 23, 24 are continuously formed in a rectangular frame shape.

[0021] The accommodation space S1 is a space surrounded by the bottom wall 25, the two side walls 20, and the two second side walls 23, 24, and is open forward. The rear surface of the bottom wall 25 faces the wall side of the building where the lighting fixture 1 is installed.

[0022] The fixture body 200 has a drainage space S2 located between the inner wall portion 21 and the outer wall portion 22 in each of the two side walls 20. That is, the fixture body 200 has two drainage spaces S2, and the two drainage spaces S2 are arranged side by side left and right so as to sandwich the accommodation space S1. Each of the two drainage spaces S2 is a space surrounded by the inner wall portion 21, the outer wall portion 22, the upper second side wall 23, the lower second side wall 24, and the bottom wall 25. The two drainage spaces S2 are both open forward.

[0023] The inner wall portion 21 is located at a position away from the second side wall 23 below the upper second side wall 23. Therefore, in a state where the support member 3 is not attached to the appliance main body 200, the upper ends of the respective two drainage spaces S2 and the upper end of the accommodation space S1 communicate with each other. When the support member 3 is attached to the appliance main body 200, the two drainage spaces S2 and the accommodation space S1 are in a state where they do not communicate with each other.

[0024] As shown in FIG. 11, the upper second side wall 23 has, at its two end portions in the left - right direction, through - holes 230 in the shape of long slits in the front - rear direction, respectively. The front - side end of the through - hole is open. The two through - holes 230 communicate with the two drainage spaces S2, respectively. The through - hole 230 is a portion through which a part of the cover body 5 passes when the cover body 5 is attached to and detached from the appliance main body 200. On the outer surface of a portion of the upper second side wall 23 adjacent to one (the right - hand side in this embodiment) of the through - holes 230, a recess 231 recessed more than other portions is provided. A screw hole 232 for attaching a screw 9 is provided in a part of the recess 231. By attaching the screw 9 to the screw hole 232, the head 90 of the screw 9 is positioned above the right - hand side through - hole 230, and the upward movement of the cover body 5 can be restricted. The head 90 of the screw 9 is received in the recess 231, so that the protrusion above the uppermost surface of the upper second side wall 23 can be suppressed.

[0025] As shown in FIG. 3, a bulging portion 233 protruding toward the accommodation space S1 (that is, downward) is provided on the lower surface of the upper second side wall 23.

[0026] In the lower second side wall 24, in a portion facing the drainage space S2, a foreign - object discharge hole 240 is formed, which can discharge foreign objects such as water, insects, and dust that have entered the drainage space S2. In a portion of the lower second side wall 24 facing the accommodation space S1, a foreign - object discharge hole 241 is formed, which can discharge foreign objects that have entered the accommodation space S1. In this embodiment, the foreign - object discharge hole 240 and the foreign - object discharge hole 241 are connected to each other and form one hole.

[0027] As shown in FIG. 11, a foreign matter discharge hole 250 is provided at the lower end of the portion of the bottom wall 25 facing the drainage space S2.

[0028] On the upper surface of the lower second side wall 24, an inclined surface 243 inclined downward toward the foreign matter discharge hole 240 and an inclined surface 244 inclined downward toward the foreign matter discharge hole 250 are formed in the portion facing the drainage space S2. Similarly, on the upper surface of the lower second side wall 24, an inclined surface (not shown) inclined downward toward the foreign matter discharge hole 241 is formed in the portion facing the accommodation space S1.

[0029] As shown in FIG. 3, the outer wall portion 22 is in the shape of a rectangular plate. One end (upper end) of the outer wall portion 22 is continuous with the upper second side wall 23, and the other end (lower end) of the outer wall portion 22 is continuous with the lower second side wall 24.

[0030] In this embodiment, the inner wall portion 21 includes a first portion 210 parallel to the outer wall portion 22, a second portion 211 parallel to the outer wall portion 22 and located outside the first portion 210, and an inclined third portion 212 connecting the first portion 210 and the second portion 211. Each of the first portion 210, the third portion 212, and the second portion 211 is in the shape of a rectangular plate. The first portion 210, the third portion 212, and the second portion 211 are continuously connected from top to bottom in this order.

[0031] As shown in FIG. 12, the inner wall portion 21 and the outer wall portion 22 are continuous at the half portion (rear half portion) on the bottom wall 25 side via a plurality (three in this embodiment) of connecting portions 26. Specifically, the upper end portion and the central portion in the vertical direction of the first portion 210 are continuous with the outer wall portion 22 via the connecting portion 26, and the remaining portion excluding the lower end portion of the second portion 211 is continuous with the outer wall portion 22 via the connecting portion 26.

[0032] A connecting portion 27 used for connection with the cover body 5 is provided on the inner wall portion 21. In this embodiment, the connecting portion 27 is provided at the central portion in the front-rear direction on the inner wall portion 21, in front of the connecting portion 26.

[0033] The connecting portion 27 has a first locking portion 270 that protrudes from the first portion 210 of the inner wall portion 21 and is L-shaped in side view, and a second locking portion 271 that protrudes from the first portion 210 and the third portion 212 of the inner wall portion 21 and is L-shaped in side view. Each of the first locking portion 270 and the second locking portion 271 has a rib 272 in the form of a protrusion extending in the vertical direction, and a rib 273 extending forward from one longitudinal end (lower end) of the rib 272.

[0034] As shown in FIG. 3, the inner wall portion 21 is further provided with a pair of fixing portions 28 that protrude toward the inside (accommodation space S1). Screws 11 for fixing the support member 3 are screwed into the pair of fixing portions 28. The fixing portions 28 are provided at one end and the other end (that is, the upper and lower ends) in the longitudinal direction of the first portion 210, respectively.

[0035] The support member 3 is attached to the instrument body 200 so as to close the accommodation space S1 of the instrument body 200. The support member 3 includes a main body portion 30 that closes the accommodation space S1, and two side wall portions 31 (see FIG. 12) that extend from the main body portion 30 so as to overlap the outer surfaces of the inner wall portions 21 of the two side walls 20, respectively. The support member 3 is made of, for example, metal and is formed by bending a single metal plate.

[0036] The light source unit 4 is attached to the main body portion 30. The main body portion 30 functions as a reflecting plate that reflects the light from the light source unit 4. The main body portion 30 is in the form of a plate having a substantially rectangular shape in plan view. The main body portion 30 has an outer shape corresponding to the two inner wall portions 21. Each of the left end side and the right end side of the main body portion 30 is bent along the first portion 210, the third portion 212, and the second portion 211 of the inner wall portion 21. The left-right dimension of the portion of the main body portion 30 that closes the space between the two second portions 211 is longer than the left-right dimension of the portion of the main body portion 30 that closes the space between the two first portions 210. An extension portion 32 extending outward in the left-right direction is formed at the lower end portion of the main body portion 30. The lower end portion of the main body portion 30 is longer in the left-right direction by the amount of the two extension portions 32. Through holes 300 into which the screws 11 are inserted are provided in the portion of the main body portion 30 corresponding to the four fixing portions 28.

[0037] Of the main body portion 30, a side wall portion 31 extends rearward from a portion corresponding to each first portion 210 of the two inner wall portions 21 (that is, the portion above the extension portion 32). As shown in FIG. 12, the two side wall portions 31 extend from the main body portion 30 inward rearward in the left - right direction such that the interval between the two side wall portions 31 becomes narrower toward the front - end side (rear side).

[0038] As shown in FIG. 3, each of the two side wall portions 31 is in a strip - plate shape. The upper - end portion of each of the two side wall portions 31 is longer rearward than the portion below it.

[0039] The support member 3 further includes an eaves portion 33 that protrudes obliquely upward rearward from the upper - end edge of the main body portion 30. The eaves portion 33 is in a strip - plate shape extending in the left - right direction. At each of the left and right end portions of the eaves portion 33, an extension portion 330 that overlaps the outer surface of the side wall portion 31 is provided.

[0040] The support member 3 is fixed to the appliance main body 200 by being attached to four fixing portions 28 of the appliance main body 200 by four screws 11. In a state where the support member 3 is fixed to the appliance main body 200, a pair of side wall portions 31 overlap the outer surfaces of a pair of inner wall portions 21. In this embodiment, at least a part of each of the two side wall portions 31 is in contact with the outer surface of the corresponding inner wall portion 21. And the side wall portion 31 and the outer surface of the inner wall portion 21 are in elastic contact.

[0041] More specifically, as shown in FIG. 12, the tip end portion (rear end portion) of each side wall portion 31 is in elastic contact with the outer surface of the corresponding inner wall portion 21. Thereby, no gap is generated between the tip end portion (rear end portion) of the side wall portion 31 and the outer surface of the inner wall portion 21.

[0042] The light - source portion 4 shown in FIG. 3 is a normal - use light - source unit that is lit by electric power from a normal power source (for example, a commercial power source). As the light - source portion 4, an appropriate normal - use light - source unit can be adopted. The light - source portion 4 is supported by the support member 3 and irradiates light in front of the support member 3.

[0043] The light source unit 4 includes a light source, a lens that controls the light distribution of the light emitted from the light source, a diffusion member 40 provided in front of the lens to diffuse the light from the lens, and a normal lighting device that lights the light source with normal power supplied from a normal power source.

[0044] The light source is, for example, a white LED (Light Emitting Diode) for illumination. The lens is formed of a light-transmissive material such as glass. Note that the lens may be formed of a synthetic resin such as polycarbonate resin or acrylic resin. The light source and the lens are attached to the front surface of the central portion of the main body portion 30 of the support member 3.

[0045] The diffusion member 40 is formed in a dome shape that protrudes forward from the central portion of the main body portion 30 of the support member 3 and opens rearward. The diffusion member 40 has a dome portion and an annular flange portion that protrudes outward from the periphery of the rear end portion of the dome portion.

[0046] The diffusion member 40 is formed by mixing a diffusing material into a light-transmissive synthetic resin such as acrylic resin or polycarbonate resin. The diffusion member 40 is attached to the central portion of the main body portion 30 of the support member 3 by fixing the flange portion to the main body portion 30 with a fixture such as a screw.

[0047] The normal lighting device is attached to the rear surface of the main body portion 30 of the support member 3 and is electrically connected to the light source. The normal lighting device has a circuit board including a power conversion circuit that converts the AC power supplied from the normal power source into DC power, a constant current circuit that makes the DC current supplied to the light source constant, and the like.

[0048] In the light source unit 4 of the present embodiment, the light emitted from the light source is controlled in light distribution by the lens, travels so as to spread in the vertical and horizontal directions toward the front of the instrument main body 200, and is diffused by the diffusion member 40.

[0049] The emergency power source 6 in the lighting unit 2 has a plurality of battery cells electrically connected in series. Each of the plurality of battery cells is, for example, a nickel-hydrogen storage battery. The emergency power source 6 is charged with the normal power supplied from the normal power source. The emergency power source 6 is attached to the bottom wall 25 so as to be located in the accommodation space S1 of the lighting unit 2.

[0050] The emergency light source unit 7 is configured to emit illumination light downward from the lower surface of the lighting unit 2.

[0051] The emergency light source unit 7 has a light source (not shown) and a lens 70 that controls the light distribution of the light emitted from the light source. The light source is, for example, a white LED for lighting. The lens 70 is formed of a light-transmissive material such as quartz glass.

[0052] The emergency light source unit 7 is attached to the lower second side wall 24 such that a part (lower part) of the lens 70 protrudes outside (lower side) of the lighting unit 2 through the insertion hole 242 of the lower second side wall 24. The remaining part of the emergency light source unit 7 excluding the lower part of the lens 70 is disposed in the accommodation space S1.

[0053] An emergency lighting device 8 is electrically connected to the light source of the emergency light source unit 7. The emergency lighting device 8 is a device that lights the emergency light source unit 7 with emergency power (DC power) supplied from the emergency power source 6 when a power failure occurs in the normal power source. The emergency lighting device 8 is attached to the bottom wall 25 so as to be located in the accommodation space S1 of the lighting unit 2.

[0054] (2) Cover body The cover body 5 in the present embodiment will be described (see FIGS. 2, 4 to 12).

[0055] The cover body 5 includes an outer cover body 530, an inner cover body 550, and a holding body 510.

[0056] The outer cover body 530 has a function of allowing the light emitted from the light source unit 4 and passing through the inner cover body 550 to pass through and be emitted to the outside of the lighting fixture 1 (see FIGS. 4 and 5). The outer cover body 530 includes a frame-shaped main portion 540 disposed at a position facing the holding surface 590 of the holding body 510, and a plurality of leg portions 544 extending from the main portion 540 toward the holding surface 590 side. In the present embodiment, the main portion 540 includes an upper frame portion 541, two side frame portions 542, and a lower frame portion 543. The upper frame portion 541 has a long bar-shaped shape in the left-right direction. Each of the two side frame portions 542 has a long bar-shaped shape in the up-down direction. The two side frame portions 542 are arranged side by side in the left-right direction with a space therebetween. The left end of the upper frame portion 541 is connected to the upper end of the left side frame portion 542, and the right end of the upper frame portion 541 is connected to the upper end of the right side frame portion 542. The lower frame portion 543 has a long bar-shaped shape in the left-right direction. The lower frame portion 543 is located below the upper frame portion 541. The left end of the lower frame portion 543 is connected to the lower end of the left side frame portion 542, and the right end of the lower frame portion 543 is connected to the lower end of the right side frame portion 542. Therefore, the main portion 540 has a square frame shape. The four leg portions 544 each project rearward from the four corners of the main portion 540. That is, the leg portions 544 project rearward from each of the connection points where the left end of the upper frame portion 541 is connected to the upper end of the left side frame portion 542, the connection point where the right end of the upper frame portion 541 is connected to the upper end of the right side frame portion 542, the connection point where the left end of the lower frame portion 543 is connected to the lower end of the left side frame portion 542, and the connection point where the right end of the lower frame portion 543 is connected to the lower end of the right side frame portion 542. Each leg portion 544 has a fixing hole 545 that opens on the rear side surface thereof.

[0057] The main body 540 and the four legs 544 of the outer cover 530 do not transmit light. Also, the outer cover 530 has an opening that allows light to pass through. That is, the outer cover 530 has an opening 549 surrounded by the upper frame portion 541, the two side frame portions 542, and the lower frame portion 543. The outer cover 530 also has an opening 546 surrounded by the upper frame portion 541, the upper right leg 544, and the upper left leg 544. The outer cover 530 also has an opening 547 surrounded by the right side frame portion 542, the upper right leg 544, and the lower right leg 544, and an opening 547 surrounded by the left side frame portion 542, the upper left leg 544, and the lower left leg 544. The outer cover 530 also has an opening 548 surrounded by the lower frame portion 543, the lower right leg 544, and the lower left leg 544.

[0058] The outer cover 530 is made of a metal such as an aluminum alloy die-cast material (ADC). The material of the outer cover 530 is not limited to the above, and for example, the outer cover 530 may be made of a resin material. The outer cover 530 may be painted.

[0059] The inner cover 550 has a function of passing the light emitted from the light source unit 4 and emitting it toward the outer cover 530. The inner cover 550 includes a main body 551 and a support portion 556 (see FIGS. 4 and 5).

[0060] The main body 551 is box-shaped with an opening 557 facing backward. The main body 551 is generally rectangular parallelepiped-shaped, and has a main board 552 constituting the front surface, two side boards 554 respectively constituting the left and right surfaces, a first end board 553 constituting the upper surface, and a second end board 555 constituting the lower surface. The main board 552 is rectangular when viewed in the front-rear direction, each side board 554 is vertically long rectangular when viewed in the left-right direction, and each of the first end board 553 and the second end board 555 is horizontally long rectangular when viewed in the up-down direction. The opening 557 is rectangular when viewed in the front-rear direction.

[0061] The support portion 556 has a flange-like shape extending outward from the entire edge of the opening 557. When viewed in the front-rear direction, the outer periphery of the support portion 556 is rectangular and larger than the outer periphery of the opening. The support portion 556 has two fixed recesses 561 at each of its upper and lower end edges. At each end edge, the two fixed recesses 561 are spaced apart side by side. The fixed recess 561 has a shape that is concave in an arc shape inward in the vertical direction. That is, the fixed recess 561 is arc-shaped when viewed in the front-rear direction and is open to the front, rear, and the outer sides in the left and right directions. From the arc-shaped edge of each fixed recess 561, a fixed rib 562 protrudes rearward. The fixed rib 562 is arc-shaped along the edge of the fixed recess 561 when viewed in the front-rear direction.

[0062] The inner cover body 550 has light transmissivity. That is, the inner cover body 550 is made of a material having light transmissivity. The inner cover body 550 in this embodiment is colorless and transparent. The inner cover body 550 is made of, for example, a transparent resin material. The resin material is, for example, an acrylic resin such as polymethyl methacrylate, but is not limited thereto. The inner cover body 550 may be made of quartz glass.

[0063] The outer surface of the inner cover body 550 has a flat shape. For this reason, the light passing through the inner cover body 550 is less likely to be scattered, and a corresponding lighting effect can be obtained.

[0064] The holder 510 is an integral member that is not separated without being damaged. The holder 510 has a main board 511, two side boards 514, a first end board 513, a second end board 515, an overlapping portion 571, and a cover connection portion 572 (see FIGS. 4 and 5).

[0065] The main board 511 is rectangular when viewed in the front-rear direction. The two side plates 514 extend rearward from the left and right edges of the main board 511 respectively. Each side plate 514 is rectangular and vertically long when viewed in the left-right direction. The first end plate 513 extends rearward from the upper edge of the main board 511. The first end plate 513 is rectangular and horizontally long when viewed in the up-down direction. The second end plate 515 extends rearward from the lower edge of the main board 511. The first end plate 513 is rectangular and horizontally long when viewed in the up-down direction. The upper ends of the left and right side plates 514 are connected to the left and right ends of the first end plate 513 respectively, and the lower ends of the left and right side plates 514 are connected to the left and right ends of the second end plate 515 respectively. Thus, the combination of the two side plates 514, the first end plate 513, and the second end plate 515 forms a rectangular frame shape. The main board 511 has an opening 512. The opening 512 is rectangular when viewed in the front-rear direction. The main board 511 has a boss 519 that protrudes rearward from its rear side surface. The boss 519 is cylindrical, and there is a fixing hole 520 inside the boss 519. In the embodiment, the main board 511 has four bosses 519 and fixing holes 520 corresponding to each boss 519. Two bosses 519 are arranged side by side in the left-right direction at positions separated upward from the upper edge of the opening 512, and the other two bosses 519 are arranged side by side in the left-right direction at positions separated downward from the lower edge of the opening 512. The main board 511 has fixing holes 518 that penetrate in the front-rear direction. The main board 511 has four fixing holes 518. The four fixing holes 518 are located at the four corners of the main board 511 respectively.

[0066] The two overlapping portions 571 each extend rearward from the rear edges of the two side plates 514. The two overlapping portions 571 are arranged side by side in the left - right direction. The two overlapping portions 571 have substantially symmetrical shapes with respect to a virtual plane that is orthogonal to the left - right direction and is located between them. Each overlapping portion 571 is in the shape of a flat plate having a thickness in the left - right direction and is long in the up - down direction when viewed in the left - right direction. The outer surface of the overlapping portion 571 is located inside the outer surface of the side plate 514. The cover connection portion 572 includes a first connection portion 573 and a second connection portion 574. Each of the first connection portion 573 and the second connection portion 574 includes a first rib 575 and a second rib 576. The first rib 575 of the first connection portion 573 and the first rib 575 of the second connection portion 574 are arranged one above the other in the up - down direction, and the first rib 575 of the first connection portion 573 is located above. The second rib 576 of the first connection portion 573 and the second rib 576 of the second connection portion 574 are arranged one above the other in the up - down direction, and the second rib 576 of the first connection portion 573 is located above. The first rib 575 protrudes inward in the left - right direction from a part of the rear edge of the overlapping portion 571. The first rib 575 has a thickness in the front - rear direction and is long in the up - down direction. The second rib 576 protrudes inward in the left - right direction from the inner surface in the left - right direction of the overlapping portion 571. The second rib 576 has a thickness in the up - down direction and is long in the front - rear direction. The first rib 575 and the second rib 576 in the first connection portion 573 are arranged with a gap in the front - rear direction and without a gap in the up - down direction. In the second connection portion 574, the first rib 575 and the second rib 576 are arranged with a gap in the front - rear direction and also with a gap in the up - down direction.

[0067] The holding body 510 is produced, for example, by injection - molding a resin material. Note that the material and production method of the holding body 510 are not limited to the above.

[0068] Regarding the relationship between the outer cover body 530 and the holding body 510 in the present embodiment, it will be further described with reference to FIGS. 6 to 9.

[0069] In this embodiment, the surface of the main board 511 of the holder 510 that faces the front side in the front-rear direction is the holding surface 590 (see FIG. 6 in particular). At each of the four corners of the holding surface 590, there is a convex portion 594 that protrudes forward from the holding surface 590. By having the convex portion 594 on the holding surface 590, the holding surface 590 has a shape that fits with the fixing surface 591. The convex portion 594 is L-shaped when viewed in the front-rear direction and has two linear pieces 594A that are adjacent to each other with a corner portion in between. The corner portion of the convex portion 594 is located at a position facing the vertex of the outer periphery of the holding surface 590 and sandwiching the fixing hole 518 at the corner of the holding surface 590, and the two pieces 594A of the convex portion 594 extend from the corner portion toward two sides of the outer periphery of the holding surface 590, respectively. There is a gap between the end of each piece 594A and the side of the holding surface 590. At each corner of the holding surface 590, a flat rectangular surface (hereinafter referred to as the mounting surface 595) surrounded by the corner and two sides of the outer periphery of the holding surface 590 and the convex portion 594 is formed. The fixing hole 518 opens on the mounting surface 595. The convex portion 594 has a top surface 594B facing forward, an inner surface 594C facing the mounting surface 595 side, an outer surface 594D facing the side opposite to the mounting surface 595, and end surfaces 594E facing the side of the holding surface 590 at both ends on both sides of the convex portion 594.

[0070] Further, the leg portion 544 of the outer cover body 530 extends from the main portion 540 toward the holding surface 590 side. The surface on the rear end side of each leg portion 544, that is, the surface facing the holding surface 590 side, is the fixing surface 591 (see FIG. 7 in particular). The fixing surface 591 is rectangular when viewed in the front-rear direction. The outer periphery of the fixing surface 591 has an exposed portion 592A facing the outside of the lighting fixture and a non-exposed portion 592B that is a portion other than the exposed portion 592A. The exposed portion 592A is composed of a vertex protruding to the outside of the lighting fixture 1 and two adjacent sides via this vertex on the outer periphery of the fixing surface 591. The non-exposed portion 592B is composed of a vertex that is diagonal to the vertex in the exposed portion 592A and two adjacent sides via this vertex on the outer periphery of the fixing surface 591.

[0071] The fixed surface 591 has a recess 593 with a shape that matches the convex portion 594. The bottom surface (the rear-facing surface) of the recess 593 is the second surface 591B, and the surface of the fixed surface 591 other than the recess 593 is the first surface 591A. The recess 593 is L-shaped when viewed in the front-rear direction.

[0072] The recess 593 is located facing the non-exposed portion 592B and not facing the exposed portion 592A. That is, the recess 593 has a shape that extends along each of two adjacent sides via the vertex of the non-exposed portion 592B when viewed in the front-rear direction. For this reason, the entire exposed portion 592A is included in the outer periphery of the first surface 591A. Each of both ends of the recess 593 does not reach up to the vertex between the exposed portion 592A and the non-exposed portion 592B, and there is a gap between them and this vertex. The recess 593 is open rearward, that is, toward the holding surface 590, and is open on the non-exposed portion 592B side. The fixing hole 545 in the outer cover body 530 opens on the first surface 591A.

[0073] In the present embodiment, each of the outer cover body 530 and the inner cover body 550 is fixed to the holding body 510 with a fixture, so that the holding body 510 holds the outer cover body 530 and the inner cover body 550.

[0074] As shown in FIGS. 2 and 10, in the cover body 5, the support portion 556 of the inner cover body 550 overlaps the rear surface of the main board 511 in the holding body 510 around the opening 512. The main portion 551 of the inner cover body 550 is disposed in front of the main board 511 through the opening 512. Each of the four bosses 519 fits into the corresponding fixing recess 561 and fixing rib 562. That is, the four bosses 519 are each fitted into the corresponding four fixing recesses 561 and fixing ribs 562. The rear surface of the boss 519 and the rear surface of the fixing rib 562 are flush. In this state, a screw 581, which is a fixture, is fitted into the inner fixing hole 520 of each boss 519. The head 582 of this screw 581 is in contact with the rear surface of the boss 519. Thereby, the inner cover body 550 is held by the holding body 510.

[0075] The main part 540 of the outer cover body 530 is located in front of the main board 511 of the holding body 510 and the main part 551 of the inner cover body 550. The main part 540 and the main board 511 are separated in the front-rear direction, and the main body board 534 and the main part 551 are separated in the front-rear direction.

[0076] The fixing surfaces 591 of the four legs 544 of the outer cover body 530 are in contact with the four corners of the holding surface 590 of the main board 511 of the holding body 510 (see FIGS. 8 and 9 in particular). The recess 593 on each fixing surface 591 and the protrusion 594 on the holding surface 590 are fitted together. The first surface 591A on the fixing surface 591 is in contact with the mounting surface 595 on the holding surface 590, and the second surface 591B on the fixing surface 591 is in contact with the top surface 594B of the protrusion 594.

[0077] The joint line that appears between the leg 544 and the holding body 510 includes the joint line 596 between the protrusion 594 and the recess 593. Since the recess 593 faces the non-exposed portion 592B, the joint line 596 between the protrusion 594 and the recess 593 is at a position that does not face the outside of the lighting fixture 1. Therefore, the joint line 596 between the protrusion 594 and the recess 593 is not easily noticeable. In the present embodiment, the outer surfaces of the adjacent protrusions 594 sandwiching the joint line 596 between the protrusion 594 and the recess 593 and the outer surface of the outer cover body 530 are flush. That is, the outer side surface 594D of the protrusion 594 and the surface of the leg 544 continuous with the outer side surface 594D via the joint line 596 are flush. Therefore, the state where the protrusion 594 and the recess 593 are fitted together is not easily noticeable. Note that being flush means that two continuous surfaces are on a virtual same plane, but a slight step between the two surfaces and the two surfaces being slightly inclined to each other due to dimensional errors and molding convenience are allowed.

[0078] Also, there is a gap between each end of the two pieces 594A of the convex portion 594 and the side of the holding surface 590, and there is also a gap between each end of both of the recesses 593 and the apex between the exposed portion 592A and the non-exposed portion 592B. For this reason, each end of the two pieces 594A of the convex portion 594 does not face the outside of the lighting fixture 1. Therefore, it is possible to suppress the appearance of the lighting fixture 1 from being impaired by the convex portion 594.

[0079] The exposed portion 592A on the fixing surface 591 is arranged at a portion facing the outside of the lighting fixture 1 among the joint lines that appear between the leg portion 544 and the holding body 510. In the present embodiment, the outer surfaces of the leg portions 544 and the outer surface of the holding body 510 adjacent to each other across the exposed portion 592A are flush.

[0080] The four fixing holes 518 in the main board 511 and the four fixing holes 545 in the outer cover body 530 are aligned with each other. A screw 583, which is a fixture, is inserted into each fixing hole 518 from the rear side of the main board 511, and this screw 583 is further inserted into the fixing hole 545. Thereby, the outer cover body 530 is held by the holding body 510.

[0081] The cover body 5 configured in this way includes a cover main body 50 including the outer cover body 530, the main board 511, the two side plates 514, the first end plate 513, the second end plate 515, and the inner cover body 550, and two overlapping portions 571 extending rearward from the right and left edge portions of the cover main body 50, respectively.

[0082] (3) Lighting fixture As shown in FIGS. 11 and 12, in the cover body 5, for the lighting unit 2 with the screw 9 removed, the first rib 575 of the second connection part 574 passes between the locking parts 270 and 271 of the lighting unit 2. Each overlapping part 571 is inserted into the drainage space S2 of the side wall 20 and slid downward, so as to be attached to the lighting unit 2. Thereby, the cover body 5 is attached to the lighting unit 2. In this state, by attaching the screw 9 to the screw hole 232 of the recess 231 on the upper side of the second side wall 23 of the lighting unit 2, the head 90 of the screw 9 is located above the overlapping part 571 on the right side of the cover body 5. Thereby, the cover body 5 is attached to the lighting unit 2 in a state where upward movement is restricted.

[0083] The cover body 5 is attached to the lighting unit 2 so as to cover the light source unit 4 and the support member 3 from the front side. The cover main body 50 is located in front of the support member 3. The light source unit 4 of the lighting unit 2 is arranged inside the main part 551 of the inner cover body 550. Each of the two overlapping parts 571 is arranged inside the lighting unit 2. Each overlapping part 571 is arranged along the outer wall part 22 in the lighting unit 2 so as to overlap the inner surface of this outer wall part 22. The fixing piece 538 closes the front opening of the drainage space S2.

[0084] The first connection part 573 is connected to the first locking part 270 of the lighting unit 2, and the second connection part 574 is connected to the second locking part 271 of the lighting unit 2. That is, in the first connection part 573, the first rib 575 and the second rib 576 sandwich the rib 272 of the first locking part 270. In the second connection part 574, the first rib 575 and the second rib 576 sandwich the rib 272 of the second locking part 271. Also, the second rib 576 of the second connection part 574 is supported from below by the rib 273 of the second locking part 271 of the lighting unit 2.

[0085] In the lighting fixture 1 of the present embodiment, when the light source unit 4 emits light, the light sequentially passes through the inner cover body 550 and the outer cover body 530 and is emitted to the outside of the lighting fixture 1. At this time, each of the inner cover body 550 and the outer cover body 530 controls a combination (lighting effect) such as the intensity of the light emitted to the outside of the lighting fixture 1, the distribution of the light intensity, the direction of the light, the degree of light scattering, and the color of the light. In the present embodiment, since the inner cover body 550 is colorless and transparent and its outer surface is flat, when the light passes through the inner cover body 550, no color change occurs and it is difficult to be scattered. The light further passes through the openings 546, 547, 548, 549 of the outer cover body 530. Also, the inner cover body 550 can be easily visually recognized from the outside through the openings 546, 547, 548, 549 of the outer cover body 530.

[0086] The light traveling from the inner cover body 550 to the outer cover body 530 includes the light traveling toward the joint between the outer cover body 530 and the holder 510. When this light enters the gap between the outer cover body 530 and the holder 510 and is further emitted from this gap to the outside of the lighting fixture 1, the joint between the outer cover body 530 and the holder 510 appears to shine, and thus the appearance of the lighting fixture 1 is impaired. However, in the present embodiment, the fixing surface 591 includes the first surface 591A and the second surface 591B having a step between the first surfaces 591A, and the holding surface 590 has a shape that fits with the fixing surface 591, so that the progress of the light that has entered the gap between the outer cover body 530 and the holder 510 is obstructed between the first surface 591A and the second surface 591B. Therefore, it is possible to suppress the joint between the outer cover body 530 and the holder 510 from appearing to shine.

[0087] Also, in the present embodiment, as described above, the entire exposed portion 592A on the outer periphery of the fixing surface 591 is included in the outer periphery of the first surface 591A, and further, the recess 593 having the second surface 591B faces the non-exposed portion 592B and is not located facing the exposed portion 592A. Therefore, a portion where a step is formed between the first surface 591A and the second surface 591B is likely to be arranged on the path of the light that has entered the gap between the outer cover body 530 and the holder 510, and thus the progress of the light can be effectively obstructed.

[0088] Also, as already described, in the present embodiment, although a step is formed on the fixed surface 591, the recess 593 faces the non-exposed portion 592B and is not located facing the exposed portion 592A. Further, the outer surfaces of the adjacent convex portions 594 and the outer surface of the outer cover body are flush with each other across the joint line 596 between the convex portion 594 and the recess 593. Therefore, the deterioration of the appearance of the lighting fixture 1 due to the step is suppressed.

[0089] Also, in the present embodiment, the main board 511 in the holder 510 is arranged at a distance from the support member 3 in front of the support member 3. Further, the two side plates 514, the first end plate 513, and the second end plate 515 in the holder 510 are arranged between the main board 511 and the support member 3 on the outer periphery of the main board 511. Therefore, the holder 510 makes it difficult to visually recognize the support member 3 from the outside of the lighting fixture 1. Thereby, the appearance of the lighting fixture 1 is improved.

[0090] Also, in the lighting fixture 1 of the present embodiment, the lighting unit 2 has two side walls 20 sandwiching the accommodation space S1, and each side wall 20 includes an inner wall portion 21 facing the accommodation space S1 and an outer wall portion 22 located outside the inner wall portion 21. Further, the cover body 5 has a cover main body 50 located in front of the support member 3 and two overlapping portions 571 extending from the cover main body 50 so as to overlap the inner surfaces of the outer wall portions 22 of the two side walls 20, respectively. Further, the support member 3 includes a main body portion 30 closing the accommodation space S1 and two side wall portions 31 extending from the main body portion 30 so as to overlap the outer surfaces of the inner wall portions 21 of the two side walls 20, respectively.

[0091] Therefore, the lighting fixture 1 has a first water-stop structure in which the outer wall portion 22 of the lighting unit 2 and the overlapping portion 571 of the cover body 5 overlap, and a second water-stop structure in which the side wall portion 31 of the support member 3 and the inner wall portion 21 of the lighting unit 2 overlap. Thus, the ingress of water from between the lighting unit 2 and the cover body 5 to the accommodation space S1 inside the lighting unit 2 can be suppressed by a two-stage water-stop structure formed by a part of the configurations of the lighting unit 2, the cover body 5, and the support member 3. Therefore, in the lighting fixture 1 of the present embodiment, since it is not necessary to use a packing having weather resistance, a decrease in appearance quality can be suppressed, and a waterproof function comparable to that when using a packing can be exhibited.

[0092] 3. Modification In the embodiment, the inner cover body 550 is colorless and transparent, and the outer surface of the inner cover body 550 is flat, but the configuration of the inner cover body 550 is not limited thereto. For example, the inner cover body 550 may be milky white, may be colored in a color other than white, or the outer surface of the inner cover body 550 may have irregularities.

[0093] The configuration of the outer cover body 530 is not limited to the embodiment. The outer cover body 530 may have an appropriate configuration as long as it can allow light to pass through. For example, the outer cover body 530 may be made of a material that can transmit light, so that it can transmit light.

[0094] In the embodiment, the outer cover body 530 has a plurality of leg portions 544, and each leg portion 544 has a fixing surface 591, but the configuration is not limited thereto. The outer cover body 530 has a fixing surface 591 that is a surface in contact with the holding surface 590 of the holding body 510, the fixing surface 591 has a first surface 591A and a second surface 591B, and it is sufficient if there is a step between the first surface 591A and the second surface 591B.

[0095] In the embodiment, the convex portion 594 is L-shaped, but the convex portion 594 may have an appropriate shape such as a block shape.

[0096] In the embodiment, the outer surfaces of the adjacent convex portions 594 sandwiching the joint line 596 between the convex portion 594 and the recess 593 are flush with the outer surface of the outer cover body 530, but the outer surface of the convex portion 594 may protrude outside the outer surface of the outer cover body 530. The outer surface of the outer cover body 530 may protrude outside the outer surface of the convex portion 594. Further, since the entire convex portion 594 is covered by the recess 593, the outer surface of the convex portion 594 may not appear outside.

[0097] Also, in the embodiment, the fixing surface 591 has the recess 593 and the holding surface 590 has the convex portion 594, but conversely, the holding surface 590 may have a recess, and the fixing surface 591 may have a convex portion that fits into the recess, and this convex portion may have the second surface 591B.

[0098] 4. Aspect The lighting fixture (1) according to the first aspect includes a lighting unit (2), an outer cover body (530), an inner cover body (550), and a holding body (510). The lighting unit (2) includes a light source unit (4) that emits light toward the outside of the lighting unit (2). The outer cover body (530) allows light to pass through, and the inner cover body (550) transmits light. The inner cover body (550) is interposed between the light source unit (4) and the outer cover body (530). The holding body (510) is fixed to the lighting unit (2) and holds the outer cover body (530). The holding body (510) has a holding surface (590). The outer cover body (530) has a fixing surface (591) that contacts the holding surface (590). The outer periphery of the fixing surface (591) has an exposed portion (592A) facing the outside of the lighting fixture (1) and a non-exposed portion (592B) that is a portion other than the exposed portion (592A). The fixing surface (591) includes a first surface (591A) and a second surface (591B) having a step between the first surfaces (591A). The holding surface (590) has a shape that fits with the fixing surface (591).

[0099] According to this aspect, when the light emitted from the light source unit (4) and transmitted through the inner cover body (550) passes through the outer cover body (530), it is possible to suppress the light from leaking out through the gap between the outer cover body (530) and the holding body (510) that holds the outer cover body (530).

[0100] In the second aspect, in the first aspect, the entire exposed portion (592A) is included in the outer periphery of the first surface (591A).

[0101] According to this aspect, in the appearance of the lighting fixture (1), the step between the first surface (591A) and the second surface (591B) is less conspicuous.

[0102] In the third aspect, in the first or second aspect, the fixing surface (591) has a recess (593), and the recess (593) has the second surface (591B). The holding surface (590) has a convex portion (594) that fits into the recess (593).

[0103] In the fourth aspect, in the third aspect, the recess (593) is located at a position facing the non-exposed portion (592B) and not facing the exposed portion (592A).

[0104] According to this aspect, in the appearance of the lighting fixture (1), the state where the recess (593) and the convex portion (594) fit together is less conspicuous.

[0105] In the fifth aspect, in the third or fourth aspect, the outer surfaces of the adjacent convex portions (594) sandwiching the seam line (596) between the convex portion (594) and the recess (593) and the outer surface of the outer cover body (530) are flush.

[0106] According to this aspect, in the appearance of the lighting fixture (1), the state where the recess (593) and the convex portion (594) fit together is less conspicuous.

[0107] In the sixth aspect, in any one of the first to fifth aspects, the outer cover body (530) includes a frame-shaped main portion (540) disposed at a position facing the holding surface (590), and a plurality of leg portions (544) extending from the main portion (540) toward the holding surface (590). Each of the leg portions (544) has the fixing surface (591).

[0108] According to this aspect, when the light emitted from the light source unit (4) and transmitted through the inner cover body (550) passes through the outer cover body (530), it is possible to suppress light from leaking out through the gap between the leg portion (544) of the outer cover body (530) and the holder (510) that holds the outer cover body (530).

Explanation of Signs

[0109] 1 Lighting fixture 2 Lighting unit 4 Light source unit 5 Cover body 510 Holder 530 Outer cover body 540 Main part 550 Inner cover body 590 Holding surface 591 Fixing surface 591A First surface 591B Second surface 592A Exposed portion 592B Non-exposed portion 593 Recess 594 Protrusion 596 Seam line

Claims

1. A lighting fixture comprising a lighting unit, an outer cover body, an inner cover body, and a holder, wherein the lighting unit includes a light source unit that emits light toward the outside of the lighting unit, the outer cover body allows light to pass through, the inner cover body allows light to transmit, and the inner cover body is interposed between the light source unit and the outer cover body, the holder is fixed to the lighting unit and holds the outer cover body, the holder has a holding surface, the outer cover body has a fixing surface that contacts the holding surface, the outer periphery of the fixing surface has an exposed portion facing the outside of the lighting fixture and a non-exposed portion other than the exposed portion, the fixing surface includes a first surface and a second surface having a step with respect to the first surface, the holding surface has a shape that fits with the fixing surface, A lighting fixture.

2. The entire exposed portion is included in the outer periphery of the first surface, The lighting fixture according to Claim 1.

3. The fixing surface has a recess, and the recess has the second surface, the holding surface has a convex portion that fits into the recess, The lighting fixture according to Claim 1.

4. The recess is located at a position facing the non-exposed portion and not facing the exposed portion, The lighting fixture according to Claim 3.

5. The outer surfaces of the adjacent convex portions sandwiching the seam line between the convex portion and the recess and the outer surface of the outer cover body are flush, The lighting fixture according to Claim 3.

6. The outer cover body includes a frame-shaped main portion disposed at a position facing the holding surface and a plurality of legs extending from the main portion toward the holding surface side, each of the legs has the fixing surface, The lighting fixture according to Claim 1.

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