Luminaire

Abstract

To improve light extraction efficiency in an end part in a longitudinal direction while restraining entry of foreign bodies such as insects.SOLUTION: A luminaire A1 comprises: a light source module 20; a long supporting member 21 supporting the light source module 20; a long cover 22 having translucency, and arranged below the light source module 20; and a cover end part 60. The cover end part 60 has translucency, and is fitted to an end part in a longitudinal direction of the cover 22. A portion (a soft part 607) of the cover end part 60 is formed of a softer material than other portions (a cylinder part 600, a wall part 601, a protruding wall 602, a base 603, a pair of joint parts 604, and a pair of retaining pieces 605) other than the soft part 607.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture in which a light source is covered with a light-transmitting cover. [Background technology]

[0002] As a conventional example, the lighting fixture described in Patent Document 1 is exemplified. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) has a light source unit and a fixture body that supports the light source unit. The light source unit includes an LED module that corresponds to a light source, a lighting device that lights up the LED module, a housing that houses the LED module and the lighting device, a cover that is attached to the housing so as to cover the LED module, and an end member.

[0003] The housing is formed in a trough shape having a long bottom wall and a pair of side walls protruding forward from upper and lower ends along the longitudinal direction of the bottom wall.

[0004] The cover has a cover body that is rectangular when viewed from the front, and a pair of legs that protrude rearward from each of a pair of long sides of the cover body. The cover body and the pair of legs are integrally formed by extrusion molding of a synthetic resin such as a polycarbonate resin.

[0005] The end member is made of a molded body of synthetic resin such as polybutylene terephthalate resin. The end member has a first end portion that closes the end of the cover, and a seal portion that seals the gap between the first end portion and the end of the cover. The seal portion prevents foreign objects such as insects from entering through the gap between the first end portion and the end of the cover. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-46605 A Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, in a long lighting fixture like the conventional example, there is a demand for improving the light extraction efficiency at the longitudinal ends while suppressing the intrusion of foreign objects such as insects.

[0008] An object of the present disclosure is to provide a lighting fixture that can improve the light extraction efficiency at the longitudinal ends while suppressing the intrusion of foreign objects such as insects. [Means for solving the problem]

[0009] A lighting device according to an aspect of the present disclosure includes a light source, a long support member that supports the light source, a long cover that is translucent and disposed in front of the light source, and a cover end portion. The cover end portion is translucent and attached to an end portion in a longitudinal direction of the cover. A portion of the cover end portion is made of a material that is softer than the remaining portion excluding the portion. Effect of the Invention

[0010] The lighting device of the present disclosure has the advantage of being able to improve the light extraction efficiency at the longitudinal ends while suppressing the intrusion of foreign objects such as insects. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a front view of the above lighting fixture. [Diagram 3] FIG. 3 is a left side view of the lighting fixture. [Figure 4] FIG. 4 is a partially cutaway exploded perspective view of the above lighting fixture. [Diagram 5] FIG. 5 is an exploded perspective view of the above lighting fixture. [Figure 6] FIG. 6 is a vertical cross-sectional view of the above lighting fixture with a portion thereof omitted. [Figure 7] FIG. 7 is a cross-sectional view of the above lighting fixture. [Figure 8] FIG. 8 is a perspective view of an end portion of the above lighting fixture. [Figure 9] FIG. 9 is an exploded perspective view of an end portion of the above lighting fixture. [Figure 10] FIG. 10 is an exploded perspective view of an end portion of the above lighting fixture. [Figure 11] FIG. 11 is a vertical cross-sectional view of a cover end portion of the lighting fixture. [Figure 12] FIG. 12 is a front view of the lighting fixture of the same as above, with a portion thereof omitted. [Figure 13] FIG. 13 is a vertical cross-sectional view of a cover end portion in the first modification of the lighting fixture. [Figure 14] FIG. 14 is a vertical cross-sectional view of a cover end portion in the second modification of the lighting fixture. [Figure 15] FIG. 15 is a vertical cross-sectional view of the third modification of the above lighting fixture, with a portion omitted. [Figure 16] FIG. 16 is a perspective view of the fourth variation of the lighting fixture of the above embodiment, in a state where the lighting fixture is attached to a wiring duct. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The embodiments of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiments is merely one example of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0013] (1) Overview A lighting fixture A1 according to the embodiment includes a light source (light source module 20), a long support member 21 that supports the light source module 20, a long cover 22 that is translucent and disposed in front of the light source module 20, and a cover end portion 60 (see Figs. 1 to 5). Note that "long" in this disclosure means a state in which the length dimension in the longitudinal direction is several times to several tens of times the length dimension in the lateral direction.

[0014] The long cover 22 has an open end in the longitudinal direction. The cover end portion 60 is made of a light-transmitting material. The cover end portion 60 is attached to the end in the longitudinal direction of the cover 22 (see FIG. 6).

[0015] A portion of the cover end portion 60 (hereinafter referred to as the flexible portion 607) is formed of a material that is softer than the other portions excluding the flexible portion 607 (portions of the cover end portion 60 other than the flexible portion 607).

[0016] Thus, in the lighting device A1 according to the embodiment, for example, if the portion of the cover end portion 60 that comes into contact with the cover 22 is made of the flexible portion 607, the gap between the cover end portion 60 and the cover 22 can be blocked by the flexible portion 607. Moreover, in the lighting device A1 according to the embodiment, the cover end portion 60 is formed of a material having translucency, so that light emitted from the light source module 20 can be extracted to the outside through the cover end portion 60. As a result, the lighting device A1 according to the embodiment can improve the light extraction efficiency at the end portion in the longitudinal direction while suppressing the intrusion of foreign objects such as insects.

[0017] (2)Details A lighting fixture A1 according to the embodiment (hereinafter, abbreviated as lighting fixture A1) includes a light source unit 2 and a fixture body 1, as shown in Figs. 1 to 6. The lighting fixture A1 is directly attached to, for example, the ceiling of an office in an office building. However, the location where the lighting fixture A1 is installed is not limited to the ceiling of the office, and it may be a wall or floor of an office or a room other than an office. In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in Fig. 1 are defined as the up-down, front-back, and left-right directions of the lighting fixture A1.

[0018] (2-1) Equipment body The appliance body 1 has a bottom plate 10 formed in a long rectangular shape, and a pair of side plates 11 protruding downward from both ends (front end and rear end) along the longitudinal direction (left-right direction) of the bottom plate 10 (see FIG. 4). The bottom plate 10 and the pair of side plates 11 are integrally formed by bending a single metal plate. In other words, the pair of side plates 11 have the function of improving the strength of the bottom plate 10.

[0019] The bottom plate 10 has two first electric wire holes 12, two second electric wire holes 13, two bolt insertion holes 14, and two hook holes 18 (see FIG. 4).

[0020] The two first electric wire holes 12 are circular holes provided at both ends (left end and right end) in the longitudinal direction of the bottom plate 10. A power cable connected to an external power source (e.g., a commercial power system) or a power cable for feeding wiring to another lighting fixture A1 is inserted into the two first electric wire holes 12. A bushing 120 made of an annular synthetic resin molded body is fitted into each first electric wire hole 12, and the bushing 120 protects the power cable from the edge of the first electric wire hole 12 of the bottom plate 10.

[0021] The power cable is connected to a power terminal block 15 attached to the lower surface of the bottom plate 10 (see FIG. 4). The power terminal block 15 is attached near the first electric wire hole 12 of the bottom plate 10.

[0022] The two second wire holes 13 are oval holes provided between the longitudinal center of the bottom plate 10 and each of the first wire holes 12. A signal cable connected to an external signal transmission source or a signal cable for feeding wiring to another lighting fixture A1 is inserted into the two second wire holes 13. The signal cable inserted into the second wire holes 13 is connected to a signal terminal block 52 provided in the light source unit 2.

[0023] The two bolt insertion holes 14 are oval holes provided between the power terminal block 15 and the second electric wire hole 13 of the bottom plate 10 (see FIG. 4). A suspension bolt protruding from the ceiling is inserted into each of the two bolt insertion holes 14. Then, a nut is fastened to the suspension bolt inserted into the bolt insertion hole 14, thereby fixing the fixture body 1 to the ceiling.

[0024] The two hanging holes 18 are round holes provided closer to the center than the second electric wire hole 13 of the bottom plate 10 (see FIG. 4). The ends of two strings for temporarily hanging the light source unit 2 are inserted into and hooked onto the two hanging holes 18.

[0025] (2-2) Mounting spring The fixture body 1 has two mounting springs 30. Each of the two mounting springs 30 serves to mount the light source unit 2 to the fixture body 1. The mounting springs 30 are provided one by one between the power terminal block 15 and the adjacent bolt insertion hole 14 on the bottom plate 10 (see FIG. 4). Each mounting spring 30 is formed into a U-shape by bending a strip-shaped metal plate. These two mounting springs 30 are fixed to the bottom plate 10 by screwing. Each mounting spring 30 is deformable (flexible) along the short side direction (front-rear direction) of the fixture body 1.

[0026] (2-3) Light source unit The light source unit 2 includes a light source module 20, a support member 21, a cover 22, a power supply unit 5, and a pair of end members 6 (see FIGS. 4 and 5).

[0027] (2-3-1) Light source module The light source module 20 has two substrates 200 and a plurality of light emitting elements (LEDs 201) mounted on the surface (lower surface) of each substrate 200 (see FIG. 5). Each substrate 200 is formed in a long rectangular shape. A conductor for supplying power to the plurality of LEDs 201 is formed on the surface of each substrate 200. The conductors of the two substrates 200 are connected via a connector mounted on the longitudinal end of each substrate 200.

[0028] The multiple LEDs 201 include, for example, white LEDs for lighting with a bulb color and white LEDs for lighting with a daylight color. The multiple LEDs 201 are arranged such that the LEDs 201 of different light emission colors are alternately arranged in a row along the longitudinal direction of the substrate 200. The multiple LEDs 201 may be composed of only white LEDs for lighting with the same color, or may include white LEDs for lighting with three or more colors. Alternatively, the multiple LEDs 201 may include LEDs having light emission colors other than white, such as red, green, and blue.

[0029] (2-3-2) Power supply unit The power supply unit 5 includes a power supply circuit 50 configured by a printed circuit and a power supply case 51 that accommodates the power supply circuit 50 (see FIG. 7). The power supply case 51 is formed in a long box shape with one surface (bottom surface) open. The power supply circuit 50 includes a rectifier circuit that rectifies the AC voltage supplied from an external power supply, a boost circuit that boosts and smoothes the pulsating voltage rectified by the rectifier circuit, a step-down circuit that steps down the DC voltage output from the step-up circuit, and a control circuit that controls the step-down circuit. The control circuit controls the step-down circuit so that the current (load current) supplied to the light source module 20 matches a target value to make it a constant current. The control circuit also adjusts the target value of the load current according to a signal (dimming signal) input from a signal transmission source via a signal cable and a signal terminal block 52 to dim and adjust the color of the light source module 20. The signal transmission source is, for example, a lighting controller installed on the wall of an office.

[0030] (2-3-3) Supporting member The support member 21 has a main portion 210 formed in a long plate shape, and a pair of side wall portions 211 standing upward from a pair of side ends (front end and rear end) along the longitudinal direction (left-right direction) of the main portion 210 (see FIGS. 5 and 7). The pair of side wall portions 211 are formed in a long rectangular shape.

[0031] Furthermore, the support member 21 has a positioning piece 212, a locking piece 213, a pair of cover attachment pieces 214, a pair of hooks 31, and a pair of protrusions 215 (see FIG. 7).

[0032] The positioning piece 212 is formed in a rectangular column shape protruding downward from a rear end on the lower surface of the main part 210. The locking piece 213 is formed in an L shape protruding downward from a front end on the lower surface of the main part 210. The positioning piece 212 and the locking piece 213 are formed in parallel to each other along the longitudinal direction of the main part 210 over the entire length of the main part 210 in the longitudinal direction. The board 200 of the light source module 20 is inserted into the gap between the locking piece 213 and the main part 210, and the board 200 is locked to the locking piece 213 (see FIG. 7). The positioning piece 212 positions the board 200 in the front-rear direction of the main part 210. The board 200 is screwed to the main part 210 by a plurality of screws.

[0033] The pair of cover attachment pieces 214 are each formed in an L-shape and protrude downward from each side end along the longitudinal direction of the main portion 210 (see FIG. 7). A pair of attachment portions 222 of the cover 22 are hooked onto each of the cover attachment pieces 214, as described below.

[0034] The pair of hooks 31 each protrude inward from approximately the center in the up-down direction on the inner surface of the pair of side wall portions 211 over the entire length of the side wall portions 211 in the longitudinal direction (see FIG. 7). However, the tip portion of each hook portion 31 is bent downward. The pair of hooks 31 hook onto the tip portions of the respective spring pieces 300 of the two mounting springs 30 attached to the appliance body 1.

[0035] The pair of protrusions 215 protrude inward from lower end portions of the inner surfaces of the pair of side wall portions 211 over the entire longitudinal length of each of the side wall portions 211 (see FIG. 7). Note that the main portion 210, the pair of side wall portions 211, the positioning piece 212, the locking piece 213, the pair of cover mounting pieces 214, the pair of hook portions 31, and the pair of protrusions 215 are preferably formed integrally by extrusion molding of a metal material such as an aluminum alloy.

[0036] (2-3-4) Cover The cover 22 has a front wall 220, a pair of side walls 221, and a pair of mounting parts 222 (see FIG. 5). The front wall 220 is formed in a long rectangular shape. The pair of side walls 221 are each formed in a long rectangular shape and protrude upward from both ends (front end and rear end) along the longitudinal direction of the front wall 220. The pair of mounting parts 222 are each formed in a long U-shape and protrude inward from the upper end of each side wall part 211 over the entire length of the side wall part 211 in the longitudinal direction. Here, the front wall 220, the pair of side wall parts 211, and the pair of mounting parts 222 are preferably formed integrally by extrusion molding of a synthetic resin having translucency, such as polycarbonate resin or acrylic resin. Note that the cover 22 is preferably formed in a milky white color by mixing a filler into the synthetic resin material in order to diffuse the light emitted from the light source module 20.

[0037] The cover 22 is attached to the support member 21 by hooking the pair of attachment portions 222 one by one onto each of the pair of cover attachment pieces 214 of the support member 21 (see FIG. 7). The cover 22 attached to the support member 21 covers the light source module 20 attached to the lower surface of the main part 210.

[0038] (2-3-5) End members The end member 6 has a cover end portion 60, an end cap portion 61, and a mounting fixture 62 (see Figs. 8 to 10). The cover end portion 60 has a tube portion 600, a wall portion 601, a protruding wall 602, a base 603, a pair of connecting portions 604, and a pair of pressing pieces 605 (Figs. 8 to 11).

[0039] The cylinder portion 600 is formed in a rectangular cylinder shape. The wall portion 601 is formed in a rectangular flat plate shape and is connected to one axial end (left-right direction) of the cylinder portion 600 to close one axial end of the cylinder portion 600. An engagement protrusion 606 having a triangular prism shape with the axial direction being the front-rear direction is provided on the upper surface of the wall portion 601 (see FIG. 10).

[0040] In addition, the flexible portion 607 formed in a C-shape in plan view is provided integrally with the cylindrical portion 600 at the other end in the axial direction of the cylindrical portion 600. The flexible portion 607 is formed in a flange shape protruding from the other end of the cylindrical portion 600 along the thickness direction (front-rear direction and up-down direction) of the cylindrical portion 600. Here, the flexible portion 607 is formed of a material softer than the portions other than the flexible portion 607 (hereinafter referred to as the other portions), that is, the cylindrical portion 600, the wall portion 601, the protruding wall 602, the base 603, the pair of connecting portions 604, and the pair of pressing pieces 605. For example, the other portions are formed of a synthetic resin material having translucency, such as polycarbonate resin or acrylic resin, similar to the cover 22. And the flexible portion 607 is formed of, for example, silicone resin (silicone rubber). Here, it is desirable that the hardness of the material forming the flexible portion 607 is in the range of 5 or more and 90 or less in durometer hardness (symbol HDA) measured with a type A durometer. On the other hand, the durometer hardness of the materials (such as polycarbonate resin or acrylic resin) forming the other parts is generally greater than 90. The durometer hardness of Type A is sometimes called Shore hardness (A).

[0041] Here, a typical method for forming the flexible portion 607 integrally with other portions is, for example, two-color molding of synthetic resin, etc. In this disclosure, "integrally formed" means forming as one part using a machine such as a molding machine without human intervention, as in two-color molding, rather than joining separately formed parts (parts) by hand.

[0042] The protruding wall 602 is formed in a rectangular flat plate shape and protrudes upward from a position on the upper surface of the tube portion 600 near the wall portion 601. The base 603 is formed in a rectangular flat plate shape and is disposed from the upper end of the protruding wall 602 in parallel with the upper surface of the tube portion 600.

[0043] The pair of connecting parts 604 are each formed in an inverted L-shape and protrude upward from both front and rear ends on the upper surface of the base 603 that are farther from the wall part 601. The pair of pressing pieces 605 are each formed in a rectangular flat plate shape and protrude from both front and rear ends of the upper part at the opening end (the end opposite to the wall part 601) of the tube part 600 along the axial direction of the tube part 600. The tube part 600, the wall part 601, the protruding wall 602, the base 603, the pair of connecting parts 604, and the pair of pressing pieces 605 are integrally formed as a synthetic resin molding having translucency such as acrylic resin or polycarbonate resin. However, in order to diffuse the light emitted from the light source module 20 like the cover 22, it is preferable that the cover end part 60 is formed in a milky white color by mixing a filler into the synthetic resin material.

[0044] The end cap portion 61 has a main body 610 having a hole 611 for passing wires through, and a lid 63 which is detachably attached to the main body 610 and covers the hole 611 when attached to the main body 610. The main body 610 and the lid 63 are each made of a synthetic resin material that does not transmit light, such as ASA (acrylonitrile-styrene-acrylic acid ester polymer) resin.

[0045] The main body 610 is formed in a U-shaped flat plate shape. A triangular prism-shaped recess (fitting recess 618) is formed on the lower surface of the main body 610 (see FIG. 9). The front surface of the main body 610 is flat, and the back surface of the main body 610 is provided with a pair of vertical pieces 612, a horizontal piece 613, a pair of support pieces 614, and a pair of protruding pieces 615.

[0046] The pair of vertical pieces 612 are formed in a roughly trapezoidal shape, and protrude from both the front and rear of the hole 611 on the back surface of the main body 610 in the thickness direction of the main body 610. The horizontal piece 613 is formed in a rectangular flat plate shape, and protrudes from below the hole 611 on the back surface of the main body 610 in the thickness direction of the main body 610 so as to connect the lower ends of the pair of vertical pieces 612.

[0047] A coupling groove 616 is provided at each of both ends in the front-rear direction of the horizontal piece 613. These coupling grooves 616 are opened at the tip side of the horizontal piece 613 and formed in a quadrangular shape with the thickness direction of the main body 610 as the longitudinal direction. Furthermore, a protrusion 617 is provided on each of the upper surfaces of the horizontal pieces 613 near the coupling groove 616. These protrusions 617 are formed in the shape of a quadrangular column with the thickness direction of the main body 610 as the axial direction.

[0048] The pair of support pieces 614 are formed in a square pyramid shape and protrude from the side surfaces of the pair of vertical pieces 612 along the main body 610 in a direction approaching the hole 611. Here, a space is formed between the pair of support pieces 614 and the main body 610, into which the flange portion 631 of the lid body 63 is slidably inserted.

[0049] The pair of protrusions 615 are formed in a rectangular column shape and protrude outward from approximately the center of the vertical pieces 612 on the outer surfaces of the pair of vertical pieces 612 along the thickness direction (front-to-back direction) of the vertical pieces 612 in the vertical direction.

[0050] The lid body 63 has a main body 630 formed in a rectangular box shape, a flange portion 631 protruding from the bottom surface and both front and rear side surfaces of the main body 630, a pair of support portions 632, and a claw portion 633 (see Figures 9 and 10).

[0051] The surface of main body 630 is a flat surface. The portions of flange 631 protruding from both front and rear side surfaces of main body 630 are formed so as to taper in thickness downward.

[0052] The pair of support portions 632 are each formed in a trapezoidal shape, and protrude in the left-right direction from both front and rear ends below the rear surface of the main body portion 630. The claw portion 633 is provided in the center in the front-rear direction on the lower surface of the main body portion 630, and protrudes toward the front surface side of the main body portion 630 beyond the flange portion 631.

[0053] The mounting fixture 62 has a fixed plate 620, a connecting plate 621, and a support plate 622. The fixed plate 620 is formed in a rectangular flat plate shape. The support plate 622 is formed in a rectangular flat plate shape smaller than the fixed plate 620. The connecting plate 621 is formed in a Z shape, and connects an end of the fixed plate 620 and an end of the support plate 622. The fixed plate 620, the connecting plate 621, and the support plate 622 are integrally formed by bending a single metal plate.

[0054] The fixing plate 620 has two circular screw insertion holes 623. The mounting fixture 62 is fixed to the support member 21 by screwing screws 625, which are inserted through the two screw insertion holes 623 of the fixing plate 620, into the main portion 210 of the support member 21 (see FIG. 6).

[0055] The fixed plate 620, the connecting plate 621 and the support plate 622 are formed with two mating grooves 624 in parallel with each other (see FIGS. 8 to 10).

[0056] (2-4) Light source unit assembly process Next, the assembly process of the light source unit 2 will be described.

[0057] The light source module 20 is attached to the underside of the main part 210. The light source module 20 is attached to the main part 210 by inserting the board 200 into the gap between the locking piece 213 and the main part 210 and screwing the board 200 to the main part 210 in a state where the board 200 is positioned by the positioning piece 212 (see FIGS. 6 and 7).

[0058] Next, the mounting portion 222 of the cover 22 is inserted from one end in the longitudinal direction of the cover 22 into the gap between the underside of the main portion 210 and the cover mounting piece 214, thereby attaching the cover 22 to the main portion 210 (see FIG. 11). Note that the cover 22 is movable relative to the main portion 210 along the longitudinal direction of the main portion 210, since the mounting portion 222 is simply hooked onto the cover mounting piece 214 of the main portion 210.

[0059] Then, the pair of coupling portions 604 of the cover end portion 60 are inserted one by one into the pair of coupling grooves 616 of the body 610 of the end cap portion 61, and the cover end portion 60 and the body 610 of the end cap portion 61 are coupled together (see FIG. 8). At this time, the coupling protrusions 606 of the cover end portion 60 and the coupling recesses 618 of the end cap portion 61 are coupled together, so that the cover end portion 60 and the end cap portion 61 are positioned.

[0060] Next, the pair of projections 617 of the main body 610 of the end cap portion 61 are engaged with the two engagement grooves 624 of the attachment tool 62 , respectively, thereby attaching the attachment tool 62 to the end cap portion 61 .

[0061] Then, the flange portion 631 is inserted into the space between the pair of support pieces 614 of the end cap portion 61 and the main body 610, thereby attaching the lid body 63 to the end cap portion 61. Note that the lid body 63 is prevented from coming off the main body 610 by the claw portions 633 provided on the main body portion 630 being caught in recesses 619 provided on the back surface of the main body 610 of the end cap portion 61 (see FIG. 6).

[0062] Here, with the lid body 63 attached to the end cap portion 61, the support plate 622 of the mounting fixture 62 is sandwiched between the pair of support parts 632 of the lid body 63 and the horizontal piece 613 of the main body 610 (see FIG. 6). As a result, the pair of support parts 632 restrict the vertical movement of the mounting fixture 62, so that the engagement between the protrusion 617 and the engagement groove 624 will not come off.

[0063] The end members 6 assembled as described above are attached to both ends of the support member 21 and the cover 22 in the longitudinal direction, one by one. Specifically, the front and rear end portions of the fixing plate 620 of the mounting fixture 62 are inserted between the upper surface of the main part 210 and the pair of protrusions 215. Also, the pair of protrusions 615 of the end cap part 61 are inserted under the hook parts 31 of the pair of side wall parts 211. That is, the pair of protrusions 615 of the end cap part 61 are hooked on the hook parts 31 in the vertical direction. As a result, rattling of the end cap part 61 with respect to the support member 21 is suppressed. Then, the fixing plate 620 is screwed to the main part 210 of the support member 21 by two screws 625 inserted into the two screw insertion holes 623 of the fixing plate 620 (see FIG. 6).

[0064] Furthermore, the tubular portion 600 and the flexible portion 607 of the cover end portion 60 are inserted into the cover 22, and both longitudinal ends of the support member 21 are closed by the main body 610 of the end cap portion 61. The flexible portion 607 inserted into the cover 22 seals the gap between the cover end portion 60 and the cover 22 by coming into close contact with the inner surfaces of the front wall 220 and the side wall 221 of the cover 22 (see FIG. 6).

[0065] As described above, the end members 6 are attached to both ends of the support member 21 and the cover 22 in the longitudinal direction, respectively, and thus the assembly of the light source unit 2 is completed.

[0066] (2-5) Installation procedure for lighting fixtures Next, a procedure for installing the lighting fixture A1 on a ceiling (construction material) will be described.

[0067] The worker performing the installation work inserts the power cable drawn from the ceiling into the room into the first wire hole 12 of the fixture body 1. The worker then inserts each of the two suspension bolts protruding from the ceiling into the two bolt insertion holes 14 of the fixture body 1, and attaches the fixture body 1 to the ceiling by tightening nuts on each suspension bolt. The worker then connects the power cable to the primary terminal of the power terminal block 15. When multiple lighting fixtures A1 are to be installed in a row, the cover 63 of the end member 6 of each lighting fixture A1 is removed from the end cap portion 61, and the power cable is routed and wired through the hole 611 of the end cap portion 61.

[0068] Next, the worker temporarily hangs the light source unit 2 on the fixture body 1 by hooking one end of each of the two strings, one end of which is hooked on the support member 21, into each of the two hanging holes 18 on the fixture body 1.

[0069] Then, the worker brings the light source unit 2 in the temporarily hung state close to the fixture body 1 while supporting it with both hands, and inserts the mounting spring 30 of the fixture body 1 between the pair of side wall portions 211 of the support member 21. Then, the tip portion of the mounting spring 30 inserted between the pair of side wall portions 211 is hooked on the hook portion 31 on the inner surface of each side wall portion 211 (see FIG. 7). As a result, the light source unit 2 is attached to the fixture body 1 by the two mounting springs 30. If the worker pulls the light source unit 2 downward, the tip portion of the mounting spring 30 will come off the hook portion 31, and the light source unit 2 can be removed from the fixture body 1.

[0070] The installation work of lighting fixture A1 is completed through the above steps.

[0071] (3) Advantages of the embodiment As described above, the lighting fixture A1 has the cover end portion 60 at the portion that contacts the cover 22 as the flexible portion 607, which is softer than the other portions, so that the gap between the cover end portion 60 and the cover 22 can be blocked by the flexible portion 607. Moreover, since the cover end portion 60 of the lighting fixture A1 is made of a material having translucency, the light emitted from the light source module 20 can be extracted to the outside through the cover end portion 60. As a result, the lighting fixture A1 can improve the light extraction efficiency at the end portion in the longitudinal direction while suppressing the intrusion of foreign objects such as insects. In particular, when a plurality of lighting fixtures A1 are installed with their end members 6 adjacent to each other, it is possible to suppress the end portions of the adjacent lighting fixtures A1 from becoming dark and deteriorating in appearance. Furthermore, since the lighting fixture A1 has the other portions of the flexible portion 607 integrally formed at the cover end portion 60, the work process can be simplified compared to the case where the flexible portion and the other portions are separate parts and assembled into one part (cover end portion) by hand.

[0072] Here, the lighting device A1 compares the hardness of the flexible part 607 with that of the other parts based on the durometer hardness value. That is, the lighting device A1 uses a material for forming the flexible part 607 that has a lower durometer hardness than the material for forming the other parts. Therefore, the lighting device A1 can select an appropriate material for each of the flexible part 607 and the other parts based on the durometer hardness. For example, when the material for forming the other parts is polycarbonate resin or acrylic resin, it is preferable to use silicone resin (silicone rubber) as the material for forming the flexible part 607. However, the material for forming the flexible part 607 is not limited to silicone resin, and may be any material that is softer (has a lower durometer hardness) than the material for forming the other parts.

[0073] Furthermore, in the lighting device A1, if the material forming the flexible portion 607 has a durometer hardness of 5 or more and 90 or less, then for example silicone resin, which is a synthetic resin material having translucency, can be used, and an increase in manufacturing costs can be suppressed.

[0074] Here, since the lighting device A1 includes the flexible part 607 in the part of the cover end part 60 facing the cover 22, the flexible part 607 can be brought into contact with the cover 22 to seal the gap between the cover 22 and the cover end part 60 with the flexible part 607 (see Figs. 6 and 7). As a result, the lighting device A1 can further prevent foreign objects such as insects from entering the space surrounded by the cover 22 and the support member 21.

[0075] Furthermore, in the lighting device A1, the cover end portion 60 is attached to the cover 22 by inserting the flexible portion 607 into the cover 22 from an opening at an end of the cover 22 in the longitudinal direction (see FIG. 6). Therefore, in the lighting device A1, it is possible to prevent the flexible portion 607 from being separated from the cover 22 due to the expansion and contraction of the cover 22, compared to a case in which the flexible portion 607 is brought into contact with the end of the cover 22 outside the cover 22.

[0076] In addition, in the lighting device A1, the flexible part 607 is formed in a flange shape that protrudes from the outer circumferential surface of the tube part 600 toward the inner wall surface of the cover 22. In other words, the flexible part 607 corresponds to a protruding part. Thus, in the lighting device A1, the tip of the flexible part 607 is brought into close contact with the inner wall surface of the cover 22 and deformed, thereby further preventing foreign objects such as insects from entering the space surrounded by the cover 22 and the support member 21.

[0077] Here, since the flexible portion 607 is formed in a flange shape, the proportion of the light emitted from the LED 201 that reaches the cover 22 from the flexible portion 607 via the tube portion 600 is much smaller than the proportion of the light that reaches the cover 22 from the flexible portion 607 without passing through the tube portion 600. As a result, the lighting device A1 can suppress the amount of light that is reduced by passing through the flexible portion 607, the tube portion 600, and the cover 22, and can improve the light extraction efficiency.

[0078] Incidentally, the support member 21 has a main part 210 formed in a long plate shape and a pair of side wall parts 211 standing upward from a pair of side ends along the longitudinal direction of the main part 210, and is formed in a long rectangular gutter shape as a whole, with both longitudinal ends being open. By forming the support member 21 in a long rectangular gutter shape, the support member 21 of the lighting device A1 can be easily manufactured by extrusion molding. The lighting device A1 is provided with an end cap part 61 that closes the open end in the longitudinal direction of the support member 21, and by closing the end with the end cap part 61, it is possible to prevent foreign objects such as insects from entering the support member 21 (the space surrounded by the main part 210 and the pair of side wall parts 211). Moreover, the lighting device A1 has the end cap part 61 connected to the cover end part 60, so that the workability of the assembly work can be improved.

[0079] Moreover, the base 603 of the cover end portion 60 corresponds to a held portion held by the horizontal piece 613 of the end cap portion 61, and the horizontal piece 613 of the end cap portion 61 corresponds to a holding portion that holds the base 603. Furthermore, the horizontal piece 613 of the end cap portion 61 connected to the cover end portion 60 presses the base 603 of the cover end portion 60 downward (in a direction in which the horizontal piece 613 approaches the base 603) (see FIG. 6). Thus, the lighting device A1 can increase the adhesion between the flexible portion 607 and the cover 22 by having the horizontal piece 613 (holding portion) of the end cap portion 61 press the base 603 (held portion) of the cover end portion 60.

[0080] Incidentally, the synthetic resin cover 22 has a larger thermal expansion coefficient (linear expansion coefficient) than the metal support member 21. Therefore, the thermal expansion of the cover 22 due to the heat generated from the light source module 20 and the power supply circuit 50 during lighting is larger than the thermal expansion of the support member 21. Therefore, in the lighting device A1, the length of the cover 22 in the longitudinal direction is made shorter than the length of the support member 21 in the longitudinal direction, and the end of the support member 21 in the longitudinal direction protrudes from the end of the cover 22 in the longitudinal direction (see FIG. 12). Furthermore, in the lighting device A1, a part of the horizontal piece 613 (holding part) of the end cap part 61 and the base 603 (held part) of the cover end part 60 are positioned outside the cover 22 (outside in the longitudinal direction) from the end of the cover 22 (see FIG. 6).

[0081] That is, if the longitudinal lengths of the support member 21 and the cover 22 are the same, there is a possibility that the longitudinal end of the thermally expanded cover 22 will push the cover end portion 60, causing an excessive force to be applied to the cover end portion 60. In contrast, the lighting device A1 has the longitudinal end of the support member 21 protruding from the longitudinal end of the cover 22, thereby reducing the possibility of the thermally expanded cover 22 coming into contact with the cover end portion 60. As a result, the lighting device A1 can suppress the occurrence of defects caused by thermal expansion, such as deformation of the cover 22 and the cover end portion 60.

[0082] It is preferable that the portions of the cover end portion 60 other than the flexible portion 607 are formed of a material having a durometer hardness smaller than that of the material forming the end cap portion 61. Thus, in the lighting device A1, by forming the entire cover end portion 60 of a material softer than the material forming the end cap portion 61, the cover 22 is easily bent (easily deformed) when the cover 22 thermally expands, and deformation (plastic deformation) of the cover end portion 60 can be suppressed.

[0083] Here, in the lighting device A1, the end member 6 is formed by connecting the cover end portion 60 and the end cap portion 61, which are separate parts, but the cover end portion 60 and the end cap portion 61 may be integrally formed as one part. In this case, the lighting device A1 can improve the workability of the assembly work by reducing the number of parts.

[0084] (4) Variations Next, modified examples of the lighting fixture A1 according to the embodiment will be described. However, the basic configuration of the lighting fixture A1 of the modified example described below is the same as the basic configuration of the lighting fixture A1 according to the embodiment. Therefore, the same reference numerals will be used to designate configurations that are common to the basic configuration of the lighting fixture A1 according to the embodiment, and illustrations and descriptions thereof will be omitted as appropriate. In the following description, "substantially common configuration" refers to configurations that are slightly different in shape, size, etc., but have the same function.

[0085] (4-1) Variation 1 The lighting device A1 of the first modification is characterized by the configuration of the flexible part 607 in the cover end portion 60. That is, as shown in Fig. 13, the flexible part 607 in the first modification is configured such that a protrusion 6070 embedded in the outer peripheral surface of the tube part 600 is added to the flexible part 607 in the embodiment. Note that the protrusion 6070 is formed in a C-shape in a plan view, similar to the flexible part 607.

[0086] Thus, in the lighting device A1 of the first modification, the protrusion 6070 embedded in the outer peripheral surface of the tubular portion 600 is added to the flexible portion 607, so that the contact area between the flexible portion 607 and the other portion (the tubular portion 600) can be increased. As a result, the lighting device A1 of the first modification can improve the bonding strength between the two-color molded flexible portion 607 and the tubular portion 600.

[0087] (4-2) Variation 2 The lighting device A1 of the second modification is characterized by the configuration of the flexible portion 607 in the cover end portion 60. That is, as shown in Fig. 14, the flexible portion 607 in the second modification has a groove portion 6071 formed in a C-shape in a plan view added to the flexible portion 607 in the embodiment. Also, the tube portion 600 in the second modification has a protrusion portion 6000 protruding from the end portion opposite the flexible portion 607. The protrusion portion 6000 is formed in a C-shape in a plan view, and engages with the groove portion 6071 of the flexible portion 607.

[0088] Thus, in the lighting device A1 of the second modification, the groove 6071 that engages with the protrusion 6000 provided on the cylindrical portion 600 is added to the flexible portion 607, so that the contact area between the flexible portion 607 and the other portion (the cylindrical portion 600) can be increased. As a result, the lighting device A1 of the second modification can improve the bonding strength between the two-color molded flexible portion 607 and the cylindrical portion 600.

[0089] (4-3) Variation 3 The lighting device A1 of the third modification is characterized by the configuration of the flexible portion 607 in the cover end portion 60 and the configuration of the cover 22 facing the flexible portion 607. That is, the flexible portion 607 in the third modification is formed in a C-shape in a plan view so as to be embedded in the outer peripheral surface of the tube portion 600, as shown in Fig. 15. Meanwhile, the cover 22 in the third modification has a protruding portion 223 that protrudes toward the flexible portion 607. The protruding portion 223 is formed in a C-shape in a plan view.

[0090] Thus, when cover end portion 60 is attached to the end of cover 22, the tip of protruding portion 223 of cover 22 abuts on flexible portion 607, thereby sealing the gap between cover 22 and cover end portion 60. Therefore, lighting device A1 of modification 3 can further prevent foreign objects such as insects from entering.

[0091] (4-4) Variation 4 A luminaire A1 of the fourth modification is characterized in that it is not directly attached to a construction material such as a ceiling, but is supported by a wiring duct B1 arranged in the construction material as shown in FIG.

[0092] In the lighting fixture A1 of the fourth modification, the upper surface of the support member 21 is covered with a plate-shaped member (top plate), and the top plate has two mounting parts 7. The two mounting parts 7 have the same structure. That is, each mounting part 7 includes a holding mechanism that is mechanically held to the wiring duct B1, and a power supply mechanism that is supplied with power from the conductor of the wiring duct B1. However, since the structure of the wiring duct B1 and the configurations of the holding mechanism and power supply mechanism are conventionally known, detailed explanations and illustrations will be omitted.

[0093] Therefore, since the lighting fixture A1 of the modified example 4 is attached to a wiring duct B1 instead of being directly attached to the construction material, there is no need to fix the fixture body 1 to the construction material, which simplifies the installation work.

[0094] (5) Summary The lighting fixture (A1) according to the first aspect of the present disclosure includes a light source (light source module 20), a long support member (21) that supports the light source, a long cover (22) that is translucent and disposed in front of the light source, and a cover end portion (60). The cover end portion (60) is translucent and is attached to an end portion in the longitudinal direction of the cover (22). A portion (flexible portion 607) of the cover end portion (60) is formed of a material that is softer than the other portions (the tube portion 600, the wall portion 601, the projecting wall 602, the base 603, the pair of connecting portions 604, and the pair of pressing pieces 605) except for that portion.

[0095] In the lighting fixture (A1) according to the first embodiment, for example, if the portion of the cover end portion (60) that comes into contact with the cover (22) is a portion (flexible portion 607), the gap between the cover end portion (60) and the cover (22) can be blocked by the portion (flexible portion 607). Moreover, since the lighting fixture (A1) according to the first embodiment has the cover end portion (60) made of a light-transmitting material, the light emitted from the light source can be extracted to the outside through the cover end portion (60). As a result, the lighting fixture (A1) according to the first embodiment can improve the light extraction efficiency at the longitudinal end portion while suppressing the intrusion of foreign objects such as insects.

[0096] A lighting device (A1) according to a second aspect of the present disclosure can be realized in combination with the first aspect. In the lighting device (A1) according to the second aspect, it is preferable that the durometer hardness of a material forming one part is smaller than the durometer hardness of a material forming another part.

[0097] In the lighting fixture (A1) according to the second embodiment, appropriate materials can be selected for each of the first and second portions based on durometer hardness.

[0098] A lighting fixture (A1) according to a third aspect of the present disclosure can be realized in combination with the second aspect. In the lighting fixture (A1) according to the third aspect, it is preferable that the durometer hardness of a material forming a part of the lighting fixture (A1) is 5 or more and 90 or less.

[0099] The lighting fixture (A1) according to the third aspect has a material forming a part thereof with a durometer hardness of 5 or more and 90 or less, so that, for example, silicone resin, a synthetic resin material having translucency, can be used, and an increase in manufacturing costs can be suppressed.

[0100] A lighting device (A1) according to a fourth aspect of the present disclosure can be realized by combining with any one of the first to third aspects. In the lighting device (A1) according to the fourth aspect, it is preferable that the part (flexible portion 607) includes a part of the cover end portion (60) that faces the cover (22).

[0101] The lighting fixture (A1) according to the fourth aspect includes a portion of the cover end portion (60) that faces the cover (22), and therefore the portion can be brought into contact with the cover (22) to partially seal the gap between the cover (22) and the cover end portion (60). As a result, the lighting fixture (A1) according to the fourth aspect can further prevent foreign objects such as insects from entering.

[0102] A lighting fixture (A1) according to a fifth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the lighting fixture (A1) according to the fifth aspect, it is preferable that an end of the cover (22) is open. It is preferable that the cover end portion (60) is attached to the end by inserting a part of the cover (22) through the opening.

[0103] The lighting fixture (A1) of the fifth aspect can prevent a portion of the lighting fixture (A1) from becoming detached from the cover (22) due to expansion and contraction of the cover (22), compared to a case in which a portion of the lighting fixture (A1) is in contact with the end of the cover (22) outside the cover (22).

[0104] A lighting fixture (A1) according to a sixth aspect of the present disclosure can be realized in combination with the fifth aspect. In the lighting fixture (A1) according to the sixth aspect, a portion of the lighting fixture (A1) preferably has a protruding portion (flexible portion 607) that protrudes toward an inner wall surface of the cover (22).

[0105] The lighting fixture (A1) according to the sixth aspect can further prevent foreign objects such as insects from entering.

[0106] A lighting fixture (A1) according to a seventh aspect of the present disclosure can be realized in combination with the fifth aspect. In the lighting fixture (A1) according to the seventh aspect, it is preferable that the cover (22) has a protruding portion (223) that protrudes toward a portion thereof.

[0107] The lighting fixture (A1) according to the seventh aspect can further prevent foreign objects such as insects from entering.

[0108] A lighting fixture (A1) according to an eighth aspect of the present disclosure can be realized by combining with any one of the first to seventh aspects. In the lighting fixture (A1) according to the eighth aspect, the support member (21) preferably has a main portion (210) formed in a long plate shape to which a light source is attached, and a pair of side wall portions (211) protruding from both ends of the main portion (210) in the short direction toward the rear of the light source. The lighting fixture (A1) according to the eighth aspect preferably further includes end cap portions (61) disposed at the longitudinal ends of the main portion (210) and the pair of side wall portions (211). The end cap portions (61) are preferably connected to the cover end portion (60).

[0109] In the lighting fixture (A1) according to the eighth aspect, the end cap portion (61) is connected to the cover end portion (60), and therefore the efficiency of the assembly work can be improved.

[0110] A lighting fixture (A1) according to a ninth aspect of the present disclosure can be realized by combining it with the eighth aspect. In the lighting fixture (A1) according to the ninth aspect, the cover end portion (60) preferably has a held portion (base 603) held by the end cap portion (61). The end cap portion (61) preferably has a holding portion (horizontal piece 613) that holds the held portion. The end cap portion (61) preferably presses the held portion in a direction approaching the holding portion when arranged at the end portion.

[0111] In the lighting fixture (A1) of the ninth aspect, the tightness of contact between the part and the cover (22) can be improved by pressing the held portion of the cover end portion (60) against the holding portion of the end cap portion (61).

[0112] A lighting fixture (A1) according to a tenth aspect of the present disclosure can be realized by combining it with the ninth aspect. In the lighting fixture (A1) according to the tenth aspect, it is preferable that a longitudinal end of the support member (21) protrudes from a longitudinal end of the cover (22). It is preferable that a part of the holding portion and the held portion is located outside the cover (22) relative to the end of the cover (22).

[0113] The lighting fixture (A1) according to the tenth aspect can suppress the occurrence of defects caused by thermal expansion, such as deformation of the cover (22) and the cover end portion (60).

[0114] A lighting fixture (A1) according to an eleventh aspect of the present disclosure can be realized in combination with the eighth aspect. In the lighting fixture (A1) according to the eleventh aspect, it is preferable that the durometer hardness of the material forming the other parts is smaller than the durometer hardness of the material forming the end cap portion (61).

[0115] The lighting fixture (A1) according to the eleventh aspect makes the entire cover end portion (60) flexible (easily deformable) when the cover (22) thermally expands, thereby making it possible to suppress deformation (plastic deformation) of the cover end portion (60).

[0116] A lighting fixture (A1) according to a twelfth aspect of the present disclosure can be realized in combination with the eighth aspect. In the lighting fixture (A1) according to the twelfth aspect, it is preferable that the end cap portion (61) is integrally formed with the cover end portion (60).

[0117] The lighting fixture (A1) according to the twelfth aspect can improve the workability of assembly work by reducing the number of parts.

[0118] A lighting fixture (A1) according to a thirteenth aspect of the present disclosure can be realized by combining with any one of the first to twelfth aspects. The lighting fixture (A1) according to the thirteenth aspect preferably further comprises a fixture body (1) to be fixed to a construction material. The support member (21) is preferably detachably attached to the fixture body (1).

[0119] The lighting fixture (A1) according to the thirteenth aspect can improve the workability of installation work.

[0120] A lighting fixture (A1) according to a fourteenth aspect of the present disclosure can be realized in combination with any one of the first to twelfth aspects. In the lighting fixture (A1) according to the fourteenth aspect, it is preferable that the support member (21) further has an attachment portion (7) that is detachably attached to the wiring duct (B1).

[0121] The lighting fixture (A1) according to the fourteenth aspect is attached to the wiring duct (B1), so there is no need to fix the fixture body (1) to construction materials, and this simplifies the installation work. [Explanation of symbols]

[0122] A1 Lighting equipment B1 Wiring duct 1. Equipment body 7 Mounting part 20 Light source module (light source) 21 Support member 22 Cover 60 Cover end part 61 End cap part 210 Main Section 211 Side wall 223 Protrusion 600 Cylinder (other parts) 601 Wall (other parts) 602 Thrust wall (other parts) 603 Pedestal (other parts; retained parts) 604 Joints (other parts) 605 Clamp (other parts) 607 Flexible part (part; protruding part) 613 Horizontal piece (holding part)

Claims

1. A light source; A long support member that supports the light source; a long cover having light transmissivity and disposed in front of the light source; a cover end portion that is translucent and is attached to an end portion in a longitudinal direction of the cover; Equipped with The portion of the cover end portion is formed of a material that is softer than the other portions excluding the portion. Lighting fixtures.

2. the durometer hardness of the material forming the one portion is less than the durometer hardness of the material forming the other portion; 2. The lighting device of claim 1.

3. The material forming the portion has a durometer hardness of 5 or more and 90 or less.

3. A lighting device according to claim 2.

4. The part includes a part facing the cover in the cover end portion. A lighting device according to any one of claims 1 to 3.

5. The end of the cover is open, The cover end portion is attached to the end portion by inserting the portion into the cover through the opening.

5. A lighting device according to claim 4.

6. The portion has a protrusion protruding toward an inner wall surface of the cover.

6. A lighting device according to claim 5.

7. The cover has a protrusion protruding toward the portion.

6. A lighting device according to claim 5.

8. The support member is a main portion formed in a long plate shape to which the light source is attached; A pair of side wall portions protruding from both ends of the main portion in a short side direction toward the rear of the light source; having The housing further includes end cap portions disposed at longitudinal ends of the main portion and the pair of side wall portions, The end cap portion is connected to the cover end portion. A lighting device according to any one of claims 1 to 3.

9. the cover end portion has a held portion that is held by the end cap portion, The end cap portion has a holding portion that holds the held portion, The end cap portion presses the held portion in a direction approaching the holding portion when the end cap portion is disposed at the end portion.

9. A lighting device according to claim 8.

10. a longitudinal end of the support member protruding beyond the longitudinal end of the cover; A part of the holding portion and the held portion is located outside the end portion of the cover.

10. A lighting device according to claim 9.

11. the durometer hardness of the material forming the other portion is smaller than the durometer hardness of the material forming the end cap portion; 9. A lighting device according to claim 8.

12. The end cap portion is integrally formed with the cover end portion.

9. A lighting device according to claim 8.

13. Further comprising a tool body fixed to the construction material; The support member is removably attached to the instrument body. A lighting device according to any one of claims 1 to 3.

14. The support member further has an attachment portion that is detachably attached to the wiring duct. A lighting device according to any one of claims 1 to 3.

Images