lighting fixtures

Abstract

To provide a luminaire in which insects hardly enter an internal space.SOLUTION: A luminaire 1 comprises an attachment plate 2, a holding body 3, a cover 4, and a walking inhibition part 5. A light source 6 is attached to the attachment plate 2. The holding body 3 holds the attachment plate 2. The cover 4 is attached to the holding body 3 so as to cover the light source 6. The walking inhibition part 5 is provided in an entry path of insects to an internal space S1 surrounded by the attachment plate 2 and the cover 4, in at least one of the attachment plate 2, the holding body 3, and the cover 4, and inhibits walking of the insects.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates generally to lighting fixtures, and more particularly to lighting fixtures that deter insect intrusion. [Background technology]

[0002] The lighting device described in Patent Document 1 includes a chassis, a light-transmitting cover, and lighting components such as a light source in a space formed by the chassis and the light-transmitting cover. The lighting device also includes a sealing member that seals the joint between the chassis and the light-transmitting cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 008280 Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting device described in Patent Document 1, the joint between the chassis and the translucent cover is sealed to prevent insects from entering the space formed by the chassis and the translucent cover (internal space). However, in such lighting devices, gaps may occur between the joints due to deterioration over time, making it easier for insects to enter the internal space.

[0005] The present disclosure has been made in view of the above circumstances, and aims to provide a lighting fixture that makes it difficult for insects to enter the interior space. [Means for solving the problem]

[0006] A lighting fixture according to one aspect of the present disclosure includes a mounting plate, a holder, a cover, and a walk-blocking portion. A light source is attached to the mounting plate. The holder holds the mounting plate. The cover is attached to the holder so as to cover the light source. The walk-blocking portion is provided in at least one of the mounting plate, the holder, and the cover in a path of insects entering an internal space enclosed by the mounting plate and the cover, and blocks the insects from walking. The cover has an opening penetrating the cover in a thickness direction, and the walking-inhibiting portion is provided on at least a part of an outer periphery of the opening. A lighting fixture according to one aspect of the present disclosure includes a mounting plate, a holder, a cover, and a walking-impeding portion. A light source is attached to the mounting plate. The holder holds the mounting plate. The cover is attached to the holder so as to cover the light source. The walking-impeding portion is provided in at least one of the mounting plate, the holder, and the cover in an entry path for insects into an internal space enclosed by the mounting plate and the cover, and impedes the insects' walking. In a target member among the mounting plate, the holder, and the cover on which the walking-impeding portion is provided, the dynamic friction coefficient of the walking-impeding portion is lower than the dynamic friction coefficient of a second portion other than the first portion on which the walking-impeding portion is provided. [Effects of the Invention]

[0007] The present disclosure has the advantage of being able to provide a lighting fixture that makes it difficult for insects to enter the interior space. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a state in which the lighting fixture according to the first embodiment is installed on a ceiling. [Figure 2] FIG. 2 is a cross-sectional view of the lighting fixture. [Figure 3] FIG. 3 is a cross-sectional view of an area A1 in FIG. [Figure 4] FIG. 4 is a cross-sectional view of a walking-hindrance portion having an uneven structure, which is one embodiment of the walking-hindrance portion provided in the lighting fixture of the above embodiment. [Figure 5] FIG. 5 is a cross-sectional view of a main part of a lighting fixture according to a modification of the first embodiment. [Figure 6] FIG. 6 is a cross-sectional view of a main part of a lighting fixture according to a modification of the first embodiment. [Figure 7] FIG. 7 is a perspective view showing a state in which the lighting fixture according to the second embodiment is installed on a ceiling. [Figure 8] FIG. 8 is a cross-sectional view of the lighting fixture according to the second embodiment. [Figure 9] FIG. 9 is a cross-sectional view of area A2 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] A lighting device 1 according to an embodiment of the present disclosure will be described in detail with reference to the drawings. Note that the figures described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the figures do not necessarily reflect the actual dimensional ratios. Furthermore, the embodiment and modified examples described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiment and modified examples. Various modifications other than these embodiment and modified examples are possible depending on the design, etc., as long as they do not deviate from the technical concept of the present disclosure. Furthermore, the following embodiments (including modified examples) may be realized in appropriate combinations.

[0010] (Embodiment 1) (1) Overview First, an overview of a lighting fixture 1 according to this embodiment will be described with reference to FIGS.

[0011] The lighting fixture 1 is, for example, a lighting fixture installed on a ceiling inside a building. Note that the lighting fixture 1 may also be a lighting fixture installed on a wall inside a building, or may be a street light or the like installed outdoors.

[0012] In the following, as shown in FIG. 1, a description will be given assuming, as an example, that the lighting fixture 1 is a lighting fixture (base light) having a long outer shape and installed on an indoor ceiling 8.

[0013] As shown in Figures 1 and 2, lighting fixture 1 includes a mounting plate 2, a holder 3, a cover 4, and a walk-impeding portion 5. A light source 6 is attached to mounting plate 2. Holder 3 holds mounting plate 2. Cover 4 is attached to holder 3 so as to cover light source 6. Walk-impeding portion 5 is provided in at least one of mounting plate 2, holder 3, and cover 4 in the path of insects 7 entering internal space S1 surrounded by mounting plate 2 and cover 4, and prevents insects 7 from walking.

[0014] With the above configuration, the walking of the insects 7 attempting to enter the internal space S1 through the entry path is blocked by the walking-blocking portion 5, thereby reducing the probability that the insects 7 will enter the internal space S1.

[0015] (2) Details The lighting fixture 1 according to this embodiment will be described in detail below.

[0016] (2.1) Lighting fixture configuration The configuration of lighting fixture 1 will be described below with reference to FIGS.

[0017] The lighting fixture 1 of this embodiment includes a holder 3 attached to a ceiling 8 and a light source unit U1 detachably attached to the holder 3, as shown in FIG.

[0018] As shown in Figures 1 and 2, the holder 3 is a processed sheet metal product formed by bending a metal plate. The holder 3 is formed in a flat box shape extending horizontally. Below, each component of the lighting fixture 1 will be explained by defining the longitudinal direction of the holder 3 as the left-right direction, and defining the direction perpendicular to both the up-down direction and the longitudinal direction of the holder 3 as the front-rear direction.

[0019] A recessed groove 31 is formed on the lower surface of the holder 3 over the entire length of the holder 3 in the left-right direction, and the recessed groove 31 accommodates the light source unit U1.

[0020] 2, the light source unit U1 includes a light source module M1, a mounting plate 2, a cover 4, and a walking-impeding portion 5. The light source unit U1 further includes a shielding portion 9.

[0021] The light source module M1 includes a light source 6 and a mounting substrate 11.

[0022] The light source 6 includes a light emitting element such as an LED (Light Emitting Diode), etc. The light source 6 is not limited to a configuration using an LED, and may be configured with an organic electroluminescence element, a discharge lamp, or the like.

[0023] The light source 6 is mounted on the mounting substrate 11 by, for example, soldering, and is electrically connected to a wiring portion provided on the mounting substrate 11.

[0024] The mounting board 11 has a long, flat outer shape, and has a plurality of light sources 6 mounted along the left-right direction. The mounting board 11 electrically connects the plurality of light sources 6 in series using a wiring portion. The plurality of light sources 6 are arranged linearly along the left-right direction of the mounting board 11 in the center of the mounting board 11 in the short side direction (the front-to-rear direction of the lighting fixture 1).

[0025] The mounting substrate 11 includes, for example, a printed wiring board. A resist film is formed on the mounting substrate 11 except for the surface on which the light source 6 is mounted. Note that the mounting substrate 11 is not limited to a printed wiring board, and may include, for example, a ceramic substrate, a metal-based printed wiring board, etc.

[0026] The mounting plate 2 is a processed sheet metal product formed by bending a metal plate, for example. As shown in Fig. 2, the mounting plate 2 of this embodiment has a U-shaped cross section.

[0027] The mounting plate 2 has a rectangular bottom plate portion 21 whose thickness direction is parallel to the vertical direction and whose longitudinal direction is parallel to the horizontal direction, and a pair of side plate portions 22 that protrude upward from both the front and rear ends of the bottom plate portion 21.

[0028] A recess 23 is formed on the lower surface of the bottom plate portion 21 across the left-right direction of the bottom plate portion 21, and the recess 23 accommodates the light source module M1.

[0029] A cover 4 is detachably attached to the mounting plate 2 to cover the light source module M1 from below.

[0030] The cover 4 is made of a diffusive material such as milky white acrylic resin. The light emitted from the plurality of light sources 6 of the light source module M1 passes through the cover 4 and is emitted downward.

[0031] A pair of hook portions 41 protruding upward are formed on both front and rear end portions of the cover 4. Each of the pair of hook portions 41 is formed over the entire length of the cover 4 in the left and right direction.

[0032] 3, each of the pair of hooking portions 41 has a vertical portion 42 and a hook portion 43. Here, FIG. 3 is an enlarged cross-sectional view of region A1 in FIG.

[0033] The vertical portion 42 is a portion that protrudes vertically upward. Note that the term "vertical" here does not only refer to a strictly vertical state, but also includes a substantially vertical state with an error of a few degrees.

[0034] The vertical portion 42 has, for example, a plurality of circular openings 44. The openings 44 penetrate the vertical portion 42 in the thickness direction.

[0035] The openings 44 are arranged at intervals in the left-right direction of the cover 4.

[0036] Some of the openings 44 are provided with fixtures (not shown) for attaching the light source unit U1 to the holder 3. The openings 44 shown in Fig. 3 are openings 44 in an open state without fixtures installed.

[0037] The vertical portion 42 has an installation surface 45 that forms an angle with the horizontal plane that is greater than 0° and less than 180°. Here, it is preferable that the angle that the installation surface 45 forms with the horizontal plane is greater than 45° and less than 135°. Note that the "horizontal plane" referred to here is a plane that is parallel to the vertical direction, that is, a plane that forms an angle of 90° with the vertical direction, but the angle that it forms with the vertical direction may deviate by several degrees from 90°. In this embodiment, the vertical portion 42 protrudes vertically upward, and the installation surface 45 is also perpendicular to the horizontal plane.

[0038] The hook portions 43 are hook-shaped portions provided above the vertical portion 42 and continuous with the vertical portion 42. The cover 4 is attached to the mounting plate 2 by the hook portions 43 of the pair of hanging portions 41 being hooked onto the pair of side plate portions 22 of the mounting plate 2, respectively.

[0039] The walking obstruction portion 5 is provided on at least one of the mounting plate 2, the holder 3, and the cover 4. In this embodiment, the walking obstruction portion 5 is provided on, for example, the cover 4. In detail, the walking obstruction portion 5 is provided on the installation surface 45 as shown in FIG.

[0040] The walking obstruction part 5 is a member for obstructing the walking of insects 7 that attempt to enter the internal space S1 surrounded by the mounting plate 2 and the cover 4. The mechanism by which the walking obstruction part 5 obstructs the walking of insects 7 will be explained in detail in "(2.2) Mechanism by which the walking obstruction part obstructs the walking of insects."

[0041] The walking-impeding portion 5 is formed by applying paint to the installation surface 45, for example.

[0042] Here, the coefficient of dynamic friction of the walk-impairing portion 5 is lower in the hook portion 41 of the cover 4 than the coefficient of dynamic friction of the portion other than the installation surface 45 on which the walk-impairing portion 5 is provided.

[0043] Table 1 shows the results of a comparison between the dynamic friction coefficient of simulated walking obstructions formed by applying multiple types of paint (paint A and paint B) to a flat plate (made of polycarbonate resin) that resembles the installation surface 45 and the dynamic friction coefficient of the flat plate when no simulated walking obstructions are formed.

[0044] [Table 1]

[0045] Here, paint A is, for example, a wet-type paint containing a fluid material such as lubricating oil, grease, or compound that has fluidity at least within the operating temperature range of the lighting fixture 1. In other words, the walk-hindrance portion 5 formed by applying paint A contains a fluid material that has fluidity at least within the operating temperature range of the lighting fixture 1. The "operating temperature range" here refers to the temperature range that the walk-hindrance portion 5 can be in when the lighting fixture 1 is turned on within the rated power range. It is desirable that the fluid material also has fluidity at room temperature (e.g., 5°C to 35°C). This allows the walk-hindrance portion 5 to impede the movement of insects 7 even when the lighting fixture 1 is off. Furthermore, the walk-hindrance portion 5 formed by applying paint A has the advantage that if part of the walk-hindrance portion 5 peels off due to insects 7 walking on it, the fluid material flows into the peeled part, thereby maintaining the effect of impeding the movement of insects 7.

[0046] Paint B is a dry type paint that does not contain any fluidity component. In other words, the walk-inhibiting portion 5 formed by applying Paint B does not have fluidity at least within the temperature range in which the lighting fixture 1 is used.

[0047] As shown in Table 1, the dynamic friction coefficients of both the simulated walking obstruction portion formed by applying paint A and the simulated walking obstruction portion formed by applying paint B were smaller than the dynamic friction coefficient of a flat plate without a simulated walking obstruction portion. In other words, it is more difficult for insects 7 to move by walking on walking obstruction portion 5 provided on installation surface 45 than on parts of hook portion 41 other than installation surface 45.

[0048] Furthermore, as shown in FIG. 4, the walking-impairing portion 5 may have an uneven structure with a plurality of protrusions 12 formed thereon. A walking-impairing portion 5 with an uneven structure is realized by attaching an uneven film sheet made of a resin such as acrylic resin or polycarbonate to the installation surface 45. Here, it is preferable that the shortest distance L1 between two adjacent protrusions 12 among the plurality of protrusions 12 is 200 nm or less. The uneven structure may also be realized by applying paint containing fine particles to the portion of the lighting fixture 1 where the walking-impairing portion 5 is to be provided.

[0049] 3, the cover 4 has an internal protrusion 46 that protrudes inward (toward the light source 6 in FIG. 2) from the surface of the hooking portion 41 opposite the installation surface 45. The internal protrusion 46 is formed, for example, over the entire length of the cover 4 in the left-right direction, and is clamped by cover ends 14 (see FIG. 1) attached to the left-right ends of the cover 4.

[0050] The cover 4 further has a receiving portion 47 for receiving the insects 7 that fall from the walking-inhibiting portion 5.

[0051] The receiving portion 47 is provided continuous with the lower end of the hooking portion 41. In detail, the receiving portion 47 has a base portion 48 provided continuous with the lower end of the hooking portion 41 below the walking obstruction portion 5, and an extension portion 49 extending obliquely upward from the base portion 48. Therefore, as shown in FIG. 3 , the base portion 48 and a portion of the extension portion 49 continuous with the base portion 48 are provided below the walking obstruction portion 5.

[0052] The extension 49 has an upper surface 491 and a lower surface 492 that face each other in the thickness direction.

[0053] The upper surface 491 is a surface that is continuous with the installation surface 45 of the hooking portion 41. When an insect 7 has its walking obstructed by the walk obstruction portion 5 installed on the installation surface 45 and falls from the walk obstruction portion 5, it hits the upper surface 491.

[0054] The lower surface 492 is covered by a shielding portion 9. Here, the shielding portion 9 is made of a material with low transparency, such as a metal plate. As a result, the shielding portion 9 visually shields the receiving portion 47 from the outside of the lighting fixture 1. Note that "visually shielding" here includes not only making it completely invisible from the outside, but also making it difficult to see from the outside.

[0055] (2.2) Mechanism of insect movement obstruction by the movement obstruction part The mechanism by which the walk-hindrance section 5 included in the lighting fixture 1 obstructs the movement of the insects 7 will be described below with reference to Fig. 3. Here, it is assumed that the insects 7 are small flying insects such as flies and mosquitoes.

[0056] Insects 7 in the external space S4 are attracted to the lighting fixture 1 by the light emitted from the lighting fixture 1.

[0057] Insects 7 attracted to the lighting fixture 1 attempt to enter the internal space S1 enclosed by the mounting plate 2 and the cover 4 via an entry path that includes space S2, the surface facing space S2, space S3, and the surface facing space S3. Here, space S2 is the space between the holder 3 and the cover 4, and includes the space from the external space S4 to the opening 44. Specifically, space S2 is the space facing the holder 3, the receiving portion 47, and the hooking portion 41. Space S2 includes a gap C1 between the tip of the extension portion 49 of the receiving portion 47 and the holder 3. Space S3 is the space between the mounting plate 2 and the cover 4, and includes the space from the opening 44 to the internal space S1. Specifically, space S3 is the space facing the bottom plate 21, the side plate 22, the hooking portion 41, and the internal protrusion 46. Space S3 includes a gap C2 between the bottom plate 21 and the internal protrusion 46.

[0058] The external space S4 and the space S2 are connected via a gap C1. The spaces S2 and S3 are connected via an opening 44. The space S3 and the internal space S1 are connected via a gap C2. This allows heat generated from the light source 6 in the internal space S1 to be released to the external space S4 through the gap C2, the opening 44, and the gap C1, thereby preventing the temperature of the internal space S1 from rising excessively.

[0059] In addition, by providing a gap C1 between the receiving portion 47 and the holder 3, it is possible to reduce the generation of abnormal noise when the lighting fixture 1 is turned on and off, which is caused by the difference in thermal expansion coefficient between the receiving portion 47 and the holder 3.

[0060] For example, the insect 7 enters the space S2 from the external space S4 through the gap C1. After entering the space S2, the insect 7 searches for a path to approach the internal space S1. That is, the insect 7 searches for the opening 44 in the space S2. Here, since the insect 7 is a small flying insect and has a low ability to grasp the relative positions of objects, the probability that the insect 7 will fly in the space S2 and move directly through the opening 44 to the space S3 is low. That is, the insect 7 is likely to fly or walk along the cover 4 or the holder 3 and search for the opening 44 that leads to the space S3.

[0061] At this time, in order for the insect 7 to reach the opening 44, it needs to walk along the outer periphery 441 of the opening 44, which is part of the installation surface 45. In this embodiment, the walking obstruction portion 5 is provided over the entire surface of the installation surface 45. In other words, the walking obstruction portion 5 is provided over the entire periphery of the outer periphery 441 of the opening 44. This reduces the possibility that the insect 7 will reach the opening 44. The walking obstruction portion 5 may also be provided on part of the outer periphery 441.

[0062] Consider a case where insect 7 passes through gap C1, walks on upper surface 491 of receiving portion 47, and reaches the lower end of hooking portion 41. After reaching the lower end of hooking portion 41, insect 7 begins walking upward, for example, on installation surface 45. At this time, since installation surface 45 is provided with walking-inhibiting portion 5, including outer peripheral edge portion 441, insect 7 is likely to fall onto repellent portion 10 provided on upper surface 491 of receiving portion 47 before reaching opening 44. Here, the vertical width of installation surface 45 is preferably 1 mm or more, which is longer than the body length of insect 7 that can pass through gap C1. This reduces the possibility that insect 7 will step over walking-inhibiting portion 5 and reach opening 44.

[0063] If the insect 7 dies in the receiving portion 47, the dead insect 7 will remain in the receiving portion 47. However, since the receiving portion 47 is visually shielded from the outside of the lighting fixture 1 by the shielding portion 9, the dead insect 7 will not spoil the aesthetic appearance of the lighting fixture 1.

[0064] Table 2 shows the results of an experiment comparing the number of insects 7 that invade the interior space S1 from the exterior space S4 when multiple types of walking obstructions 5 (walking obstructions A to C) are provided on the installation surface 45 of a lighting fixture 1 and when no walking obstructions 5 are provided. The experiment was conducted in the same outdoor location and at the same time of day, with the lighting fixture 1 with walking obstructions A to C and the lighting fixture 1 without walking obstructions 5 both left on. Table 2 also lists the intrusion ratio, which is the ratio of the number of insects 7 that invade the interior space S1 to the number of insects 7 that invade the interior space S1 when no walking obstructions 5 are provided.

[0065] [Table 2]

[0066] Walking obstruction portion A is a walking obstruction portion 5 formed by applying the wet-type paint A described in "(2.1) Configuration of the lighting fixture." Walking obstruction portion B is a walking obstruction portion 5 formed by applying the dry-type paint B. Walking obstruction portion C is a walking obstruction portion 5 having an uneven structure with multiple protrusions 12 (see Figure 4) formed therein.

[0067] As shown in Table 2, when the walking-impeding portions A to C were provided on the installation surface 45, the number of insects 7 entering the internal space S1 was reduced compared to when the walking-impeding portion 5 was not provided. In this way, it was confirmed that, in the lighting fixture 1 of this embodiment, the provision of the walking-impeding portion 5 reduces the probability of insects 7 entering the internal space S1.

[0068] (3) Variations Below, we will list some modifications of the first embodiment. The following modifications can be applied in appropriate combinations.

[0069] The walking-inhibiting portion 5 may be further provided on the holder 3. As an example, the walking-inhibiting portion 5 may be further provided on the inner surface 32 of the holder 3, for example, as shown in FIG.

[0070] The walking-impairing portion 5 may be further provided on the mounting plate 2. As an example, as shown in Fig. 6, the walking-impairing portion 5 may be further provided on the outer surface 24 of the side plate portion 22 of the mounting plate 2 facing the space S3.

[0071] The walking-inhibiting portion 5 may be further provided on the upper surface 491 of the receiving portion 47.

[0072] The receiving portion 47 may be configured as a separate body from the cover 4 .

[0073] (Embodiment 2) As shown in FIG. 7, the lighting fixture 1 according to this embodiment is a lighting fixture (ceiling light) having a circular outer shape and installed on an indoor ceiling 8.

[0074] Hereinafter, the same components as those in the first embodiment will be denoted by the same reference numerals and will not be described as necessary. In addition, the vertical direction will be described as the up-down direction when the lighting fixture 1 is installed on the ceiling 8.

[0075] As shown in FIG. 8, the lighting fixture 1 of this embodiment includes a mounting plate 20, a holder 30, a cover 40, a walking-impeding portion 5, and a shielding portion 90.

[0076] The mounting plate 20 has a circular plate shape with an opening in the center, and a plurality of light sources 6 are mounted on the circumference.

[0077] The mounting plate 20 includes, for example, a printed wiring board. Note that the mounting plate 20 is not limited to a printed wiring board, and may include, for example, a ceramic substrate, a metal-based printed wiring board, or the like.

[0078] The holder 30 is a processed sheet metal product formed, for example, by bending a metal plate. As shown in Figures 8 and 9, the holder 30 includes a disk-shaped holder portion 301 and a protrusion 302 that protrudes downward from the outer periphery of the holder portion 301.

[0079] The holding portion 301 holds the mounting plate 20 on its lower surface.

[0080] The cover 40 is made of a material having diffusive properties, such as milky white acrylic resin.

[0081] Cover 40 is formed in a flat dome shape with an open top. Holding portion 301 is provided with a plurality of fixtures (not shown) that hold cover 40. Cover 40 is detachably attached to holding body 30 via the plurality of fixtures.

[0082] 9, cover 40 has a dome portion 401 that diffuses light from light source 6 and emits it downward, an annular receiving portion 402 that covers the upper part of dome portion 401, a wall surface portion 403 that protrudes upward from the inner peripheral edge of receiving portion 402, and an annular portion 404 that protrudes outward from the upper end of wall surface portion 403. Here, FIG. 9 is an enlarged cross-sectional view of area A2 in FIG. 8.

[0083] The shielding portion 90 is provided on the underside of the receiving portion 402 inside the cover 40. The shielding portion 90 is made of a material with low transparency, such as a metal plate. As a result, the shielding portion 90 visually shields the receiving portion 402 from the outside of the lighting fixture 1.

[0084] The walking-impeding portion 5 is a member for impeding the movement of insects 7 attempting to enter the internal space S1 facing the mounting plate 20, the holder 30, and the cover 40. Here, the insects 7 enter the internal space S1 via an entry path that includes, for example, a gap C3 between the opposing underside 303 of the holder 301 and the upper surface 405 of the annular portion 404, and a gap C4 between the opposing inner surface 304 of the protruding portion 302 and the outer surface 406 of the annular portion 404. Therefore, the walking-impeding portion 5 is provided on the underside 303 of the holder 301, the upper surface 405 of the annular portion 404, the inner surface 304 of the protruding portion 302, and the outer surface 406 of the annular portion 404. Note that the gaps C3 and C4 are preferably equal to or greater than 0.6 mm, which is the average body width of insects 7, which are small flying insects. This reduces the possibility that the insect 7 will use both the lower surface 303 and the upper surface 405 for support as it walks, and that it will use both the inner surface 304 and the outer surface 406 for support as it walks. It is further preferable that the gaps C3 and C4 be 15 mm or less.

[0085] The mechanism by which the walk-hindrance section 5 of the lighting fixture 1 obstructs the movement of the insects 7 will be described below with reference to Fig. 9. As in the first embodiment, the insects 7 are assumed to be small flying insects such as flies and mosquitoes.

[0086] Insects 7 in the external space S4 are attracted to the lighting fixture 1 by the light emitted from the lighting fixture 1.

[0087] Insects 7 attracted to lighting fixture 1 attempt to enter internal space S1 via an entry route that includes gaps C3 and C4.

[0088] An insect 7 attempting to enter the internal space S1 will come into contact with at least one of the lower surface 303, the upper surface 405, the inner surface 304 and the outer surface 406 with a high probability while moving toward the internal space S1.

[0089] For example, if an insect 7 flies and comes into contact with the walking-inhibiting portion 5 provided on the inner surface 304 and starts walking upward on the inner surface 304, the walking-inhibiting portion 5 provided on the inner surface 304 will hinder the insect 7 from walking, and there is a high possibility that the insect 7 will fall into the receiving portion 402.

[0090] At this time, if the insect 7 dies in the receiving portion 402, the dead insect 7 will remain in the receiving portion 402. However, since the receiving portion 402 is visually shielded from the outside of the lighting fixture 1 by the shielding portion 90, the dead insect 7 will not spoil the aesthetic appearance of the lighting fixture 1.

[0091] Furthermore, for example, if an insect 7 flies and comes into contact with a walking-impeding portion 5 provided on the upper surface 405, and starts walking on the upper surface 405 toward the internal space S1, the walking-impeding portion 5 provided on the upper surface 405 will hinder the insect 7's walking, making it difficult for the insect 7 to reach the internal space S1.

[0092] At this time, if the insect 7 dies at the walking-hindrance portion 5 provided on the upper surface 405, the dead insect 7 will remain on the upper surface 405. However, since the upper surface 405 is indirectly visually shielded from the outside of the lighting fixture 1 by the shielding portion 90 that shields the receiving portion 402, the dead insect 7 will not spoil the aesthetic appearance of the lighting fixture 1.

[0093] (summary) As described above, the lighting fixture (1) according to the first aspect includes a mounting plate (2), a holder (3), a cover (4), and a walk-hindrance portion (5). A light source (6) is attached to the mounting plate (2). The holder (3) holds the mounting plate (2). The cover (4) is attached to the holder (3) so as to cover the light source (6). The walk-hindrance portion (5) is provided in at least one of the mounting plate (2), the holder (3), and the cover (4) in a path of insects (7) entering the internal space (S1) surrounded by the mounting plate (2) and the cover (4), and hinders the insects (7) from walking.

[0094] According to this embodiment, by hindering the insects (7) from walking, it is possible to reduce the probability that the insects (7) will enter the internal space (S1).

[0095] The lighting fixture (1) according to the second aspect is the lighting fixture (1) of the first aspect, which has a gap (C1) between the holder (3) and the cover (4). The entry path includes at least a part of the gap (C1).

[0096] According to this embodiment, by dissipating heat generated in the internal space (S1) to the external space (S4) through the gap (C1), it is possible to suppress an increase in temperature in the internal space (S1) while suppressing the entry of insects (7) through the gap (C1).

[0097] In the lighting fixture (1) according to the third aspect, in the first or second aspect, the walking-impeding portion (5) includes paint applied to at least one of the mounting plate (2), the holder (3), and the cover (4).

[0098] According to this embodiment, the walking-impairing portion (5) can be easily formed.

[0099] In the lighting fixture (1) according to a fourth aspect, in any one of the first to third aspects, at least one of the mounting plate (2), the holder (3), and the cover (4) has an installation surface (45). The installation surface (45) forms an angle with the horizontal plane that is greater than 0° and less than 180°. The walking-impeding portion (5) is provided on the installation surface (45).

[0100] According to this embodiment, it is possible to increase the probability that the insects (7) will fall downward from the walking-inhibiting portions (5) provided on the installation surface (45).

[0101] In the lighting fixture (1) according to the fifth aspect, in the fourth aspect, the angle that the installation surface (45) forms with respect to the horizontal plane is equal to or greater than 45° and equal to or less than 135°.

[0102] According to this embodiment, it is possible to increase the probability that the insects (7) will fall downward from the walking-inhibiting portions (5) provided on the installation surface (45).

[0103] In the lighting fixture (1) according to a sixth aspect, in any one of the first to fifth aspects, the cover (4) has an opening (44) penetrating through the cover (4) in a thickness direction. The walking-inhibiting portion (5) is provided on at least a part of an outer peripheral edge portion (441) of the opening (44).

[0104] According to this embodiment, the possibility of insects (7) reaching the opening (44) can be reduced.

[0105] In the lighting fixture (1) according to the seventh aspect, in any of the first to sixth aspects, the coefficient of dynamic friction of the walking-impeding portion (5) is lower than the coefficient of dynamic friction of the second portion other than the first portion where the walking-impeding portion (5) is provided in the target member among the mounting plate (2), the holder (3) and the cover (4) where the walking-impeding portion (5) is provided.

[0106] According to this embodiment, the insects (7) can be prevented from walking by sliding on the walking-inhibiting portions (5).

[0107] In the lighting fixture (1) according to an eighth aspect, in any one of the first to seventh aspects, the walking-inhibiting portion (5) includes a fluid material that has fluidity at least in the operating temperature range of the lighting fixture (1).

[0108] According to this embodiment, when a part of the walking-inhibiting portion (5) is peeled off due to the insect (7) walking on it, the fluid material flows into the peeled off portion, thereby maintaining the effect of the walking-inhibiting portion (5) in inhibiting the walking of the insect (7).

[0109] In the lighting fixture (1) according to a ninth aspect, in any one of the first to eighth aspects, the walking-inhibiting portion (5) has an uneven structure in which a plurality of convex portions (12) are formed, and the shortest distance between two adjacent convex portions (12) among the plurality of convex portions (12) is 200 nm or less.

[0110] According to this embodiment, the insects (7) can be prevented from walking by sliding on the walking-inhibiting portions (5).

[0111] In the lighting fixture (1) according to a tenth aspect, in any one of the first to ninth aspects, the width of the portion on the approach path where the walking-inhibiting portion (5) is provided is 1 mm or more.

[0112] According to this embodiment, it is possible to reduce the possibility that the insect (7) will step over the walking-inhibiting portion (5) on its entry path.

[0113] The lighting fixture (1) according to an eleventh aspect is the lighting fixture (1) of any one of the first to tenth aspects, further comprising a receiving portion (47) for receiving insects (7) falling from the walking-hindrance portion (5). At least a portion of the receiving portion (47) is provided below the walking-hindrance portion (5).

[0114] According to this embodiment, it is possible to reduce the possibility that the insects (7) falling from the walking-inhibiting portions (5) will fall into the external space (S4).

[0115] The lighting fixture (1) according to a twelfth aspect is the lighting fixture (1) of the eleventh aspect, further comprising a shielding portion (9) that visually shields the receiving portion (47) from the outside of the lighting fixture (1).

[0116] According to this embodiment, it is possible to reduce the possibility that the insects (7) caught in the receiving portion (47) will spoil the aesthetic appearance of the lighting fixture (1).

[0117] In a lighting fixture (1) according to a thirteenth aspect, in any one of the first to twelfth aspects, the approach path includes a gap between two opposing surfaces. A walking-impeding portion (5) is provided on at least one of the two opposing surfaces. The distance between the two opposing surfaces is 0.6 mm or more.

[0118] According to this embodiment, it is possible to reduce the possibility that the insect (7) will use both surfaces for support while walking.

[0119] The second to thirteenth aspects are not essential components of the lighting fixture (1) and can be omitted as appropriate. [Explanation of symbols]

[0120] 1. Lighting equipment 2 Mounting Plate 3 Holding body 4 Cover 5. Walking obstruction area 6 light source 7. Insects 12 Convex part 44 Opening 45 Installation surface 47 Receiving part 441 Outer edge C1 Gap S1 interior space S4 External Space

Claims

1. a mounting plate on which the light source is mounted; a holder for holding the mounting plate; a cover attached to the holder so as to cover the light source; a walk-blocking portion provided in at least one of the mounting plate, the holder, and the cover on a path of insects entering an internal space surrounded by the mounting plate and the cover, the walk-blocking portion blocking the insects' movement; the cover has an opening penetrating through the cover in a thickness direction, The walking-impeding portion is provided on at least a part of the outer peripheral edge of the opening. Lighting fixtures.

2. A mounting plate on which a light source is attached; a holder for holding the mounting plate; a cover attached to the holder so as to cover the light source; a walk-blocking portion provided in at least one of the mounting plate, the holder, and the cover on a path of insects entering an internal space surrounded by the mounting plate and the cover, the walk-blocking portion blocking the insects' movement; In a target member on which the walking-impeding portion is provided among the mounting plate, the holder, and the cover, the dynamic friction coefficient of the walking-impeding portion is lower than the dynamic friction coefficient of a second portion other than the first portion on which the walking-impeding portion is provided. Lighting fixtures.

3. A gap is provided between the holder and the cover, and the entry path includes at least a portion of the gap.

3. A lighting fixture according to claim 1 or 2.

4. The walking-impeding portion includes paint applied to at least one of the mounting plate, the holder, and the cover. The lighting fixture according to any one of claims 1 to 3.

5. At least one of the mounting plate, the holder, and the cover has an installation surface that forms an angle with respect to a horizontal plane that is greater than 0° and less than 180°; The walking-impeding portion is provided on the installation surface. The lighting fixture according to any one of claims 1 to 4.

6. The angle that the installation surface makes with respect to the horizontal plane is 45° or more and 135° or less.

6. A lighting fixture according to claim 5.

7. The walking-impeding portion includes a fluid material that has fluidity at least in the operating temperature range of the lighting fixture. The lighting fixture according to any one of claims 1 to 6.

8. The walking-impeding portion has an uneven structure in which a plurality of convex portions are formed, The shortest distance between two adjacent convex portions among the plurality of convex portions is 200 nm or less. The lighting fixture according to any one of claims 1 to 7.

9. The width of the portion on the approach path where the walking obstruction portion is provided is 1 mm or more. A lighting fixture according to any one of claims 1 to 8.

10. The device further includes a receiving portion for receiving the insects that fall from the walking-impeding portion, At least a portion of the receiving portion is provided below the walking obstruction portion. The lighting fixture according to any one of claims 1 to 9.

11. Further comprising a shielding portion that visually shields the receiving portion from the outside of the lighting fixture.

11. A lighting fixture according to claim 10.

12. The entry path includes a gap between two opposing surfaces, The walking-impeding portion is provided on at least one of the two opposing surfaces, The distance between the two opposing surfaces is 0.6 mm or more. A lighting fixture according to any one of claims 1 to 11.

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