lighting fixtures

Abstract

To provide a ceiling embedded type lighting device which enables easy removal.SOLUTION: A lighting device includes: a device body which is inserted into an attachment hole formed at a ceiling material and has a protruding part protruding farther than a ceiling surface and having an outer diameter larger than an opening diameter of the attachment hole; a light source module provided at the device body; a translucent cover attached to the protruding part and covering the protruding part; an elastic member which is provided at the device body and used to attach the device body to the attachment hole; and a marking which is provided at one of the protruding part and the cover and indicates a position of the elastic member in a circumferential direction of the device body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to lighting fixtures. [Background technology]

[0002] Conventionally, there has been known a ceiling-recessed lighting fixture that is attached by being inserted into a mounting hole formed in a ceiling material (see, for example, Patent Document 1). Generally, a ceiling-recessed lighting fixture includes a fixture body that is inserted into a mounting hole in the ceiling material from the indoor side, a light-transmitting cover that is attached to cover an opening of the fixture body that protrudes above the ceiling surface, and an elastic member for attaching the fixture body to the mounting hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-149790 Summary of the Invention [Problem to be solved by the invention]

[0004] When removing a recessed ceiling lighting fixture attached to a mounting hole in a ceiling material, the worker grasps the outer periphery of the cover exposed to the room side with their hands and pulls the lighting fixture out of the mounting hole toward the room while swinging it. However, depending on the relationship between the swing direction and the position of the elastic member, removing the lighting fixture can be difficult.

[0005] The present disclosure aims to provide a ceiling recessed lighting fixture that is easy to remove. [Means for solving the problem]

[0006] The present disclosure relates to a ceiling-recessed lighting fixture comprising: a fixture body that is inserted into a mounting hole formed in a ceiling material and that has a protruding portion that protrudes above the ceiling surface and has an outer diameter larger than the opening diameter of the mounting hole; a light source module provided on an upper part of the fixture body; a translucent cover that is attached to and covers the protruding portion; an elastic member that is provided on the fixture body and that attaches the fixture body to the mounting hole; and a marking that is provided on either the protruding portion or the cover and that indicates the position of the elastic member in the circumferential direction of the fixture body. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view of a lighting fixture according to a first embodiment. [Figure 2] FIG. 2 is a rear view of the lighting fixture according to the first embodiment. [Figure 3] 1 is a plan view of a lighting fixture according to a first embodiment. [Figure 4] FIG. 2 is a bottom view of the lighting fixture according to the first embodiment. [Figure 5] FIG. 2 is a right side view of the lighting fixture according to the first embodiment. [Figure 6] FIG. 1 is a left side view of a lighting fixture according to a first embodiment. [Figure 7] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 8] FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 2 is a bottom perspective view of the lighting fixture according to the first embodiment attached to the mounting hole with the cover removed. [Figure 12] FIG. 2 is a bottom perspective view of the lighting fixture according to the first embodiment attached to the attachment hole. [Figure 13] FIG. 2 is a partially see-through left side view of the lighting fixture according to the first embodiment. [Figure 14] FIG. 2 is a left side view of a portion of the fixture body of the lighting fixture according to the first embodiment. [Figure 15] FIG. 1 shows a first embodiment of marking. [Figure 16] FIG. 10 shows a second embodiment of the marking. [Figure 17] FIG. 10 is a diagram showing a third embodiment of marking. [Figure 18] FIG. 10 is a diagram showing a fourth embodiment of marking. [Figure 19] FIG. 10 is a diagram showing a fifth embodiment of marking. [Figure 20] FIG. 10 is a diagram showing a sixth embodiment of marking. [Figure 21] FIG. 10 is a diagram showing a seventh embodiment of marking. [Figure 22] FIG. 10 is a diagram showing an eighth embodiment of marking. [Figure 23] FIG. 10 is a left side view showing the lighting fixture being removed from the mounting hole in the ceiling material. [Figure 24] FIG. 10 is a rear view showing the lighting fixture being removed from the mounting hole in the ceiling material. DETAILED DESCRIPTION OF THE INVENTION

[0008] A lighting fixture 1 according to a first embodiment of the present disclosure is a recessed-ceiling downlight that is attached from the indoor side to a circular mounting hole formed in a ceiling material, for example, in a bathroom, etc. As shown in the six-sided views of Figures 1 to 6 and the cross-sectional views of Figures 7 and 8, the lighting fixture 1 includes a fixture body 2, a light source module 3, a cover 4, an elastic member 5, and a marking 6. In the drawings described below, the X direction represents the left-right direction, the Y direction represents the front-rear direction, and the Z direction represents the up-down direction.

[0009] The fixture body 2 is inserted from the room side into a circular mounting hole formed in the ceiling material of, for example, a bathroom. The fixture body 2 in this embodiment is cylindrical. The fixture body 2 is formed from, for example, a thermoplastic resin such as polycarbonate or a metal such as aluminum, but is not limited to these. The fixture body 2 has, arranged in this order from the top, a small-diameter portion 21 with a relatively small diameter, a large-diameter portion 22 with a relatively large diameter, and a cylindrical protruding opening portion 23 that protrudes and opens toward the room beyond the ceiling surface.

[0010] 1 and 2, the small diameter portion 21 has a pair of claws 211, 212 protruding from the outer peripheral surface on the outer periphery at positions on opposite sides of the central axis C of the small diameter portion 21. The large diameter portion 22 has a pair of approximately L-shaped notches 221, 222 on the outer periphery at positions on opposite sides of the central axis C of the large diameter portion 22. With the pair of claws 211, 212 of the small diameter portion 21 inserted from above into the corresponding pair of notches 221, 222 of the large diameter portion 22, the small diameter portion 21 and the large diameter portion 22 are rotated relatively around the central axis C, whereby the pair of claws 211, 212 are engaged with the pair of notches 221, 222, respectively. With the pair of claws 211, 212 engaged with the pair of notches 221, 222, respectively, the small diameter portion 21 is fixed to the large diameter portion 22 with a screw 213.

[0011] As shown in the cross-sectional view of Figure 7, the fixture body 2 has a reflector portion 20 on its inner surface that reflects light emitted by the light source module 3 and guides it indoors. The inner shapes of the small diameter portion 21 and the large diameter portion 22 are continuous, so that the inner shape of the fixture body 2 in this embodiment has a truncated cone shape that widens in diameter from top to bottom. In other words, the reflector portion 20 in this embodiment has a truncated cone shape. The reflector portion 20 is formed by coating the inner surface of the fixture body 2 with, for example, a thermoplastic resin.

[0012] In this embodiment, the protruding opening 23 is cylindrical. When the lighting fixture 1 is attached to the mounting hole in the ceiling material, the protruding opening 23 protrudes and opens below the ceiling surface toward the indoor side. The protruding opening 23 has a flange portion 231, a protruding portion 232, and an opening 233. An annular waterproof gasket 24 is provided on the upper surface of the flange portion 231. The waterproof gasket 24 seals off water around the mounting hole.

[0013] The flange portion 231 is formed between the protrusion 232 and the ceiling surface, protruding radially outward beyond the protrusion 232 along the entire circumference. The flange portion 231 is positioned so as to abut against the ceiling surface at the periphery of the mounting hole. The protrusion 232 is cylindrical, and an opening 233 is formed at the lower end, and light reflected by the reflector portion 20 is irradiated from this opening 233 downward toward the indoor side.

[0014] 1 to 7, the light source module 3 is provided on the upper part of the fixture body 2. As shown in the cross-sectional views of FIGS. 7 and 8, the light source module 3 has a light source 31, a substrate 32, electronic components 33, a heat sink 34, a power cable 35, and a case 36.

[0015] A plurality of LEDs are used as the light source 31. The light source 31, which is made up of a plurality of LEDs, is mounted on the underside of a substrate 32. A plurality of electronic components 33 and a power cable 35 are mounted on the upper surface of the substrate 32. A heat sink 34 is attached to the substrate 32. The heat sink 34 is made by bending a plate-shaped metal fitting, and is surface-bonded to the upper surface of the substrate 32 opposite to the side on which the light source 31 is mounted. The heat sink 34 efficiently dissipates heat generated by the light source 31. The light source 31, substrate 32, electronic components 33, and heat sink 34 are housed in a case 36.

[0016] The case 36 includes a box-shaped lower case 361 with an open top and a lid-shaped upper case 362 with an open bottom. The case 36 is configured by placing the upper case 362 over the lower case 361. As shown in FIG. 8 , the lower case 361 has an opening 363 on the bottom surface at one end. The substrate 32 is housed and positioned within the case 36 so that the light source 31, which is composed of multiple LEDs mounted on the bottom surface of the substrate 32, is positioned at the position of the opening 363. The case 36 is positioned above the small-diameter portion 21 of the cylindrical fixture body 2 so that the opening 363 formed on the bottom surface at one end of the lower case 361 faces the opening 210 of the small-diameter portion 21 of the cylindrical fixture body 2, and is fixed with screws 364. As a result, light emitted from the light source 31 is radiated downward and introduced into the fixture body 2, which has the reflector 20 on its inner surface.

[0017] The light source module 3 is provided extending in a direction protruding from the fixture main body 2. The lower case 361 has legs 365 extending downward from its underside. These legs 365 are normally spaced apart from the underside of the ceiling, and when the lighting fixture 1 tilts when being removed, they come into contact with the underside of the ceiling, thereby supporting the light source module 3. This prevents the light source module 3 from tilting, and prevents the lighting fixture 1 from coming off the mounting hole.

[0018] The cover 4 is attached to the protrusion 232 so as to cover the protrusion 232 and the opening 233. The cover 4 is a light-transmitting cover, and diffuses the light emitted by the light source module 3 into the room.

[0019] The cover 4 has a cylindrical shape with a bottom, and is attached to the protruding portion 232 with its opening 40 facing upward toward the protruding opening 23. Specifically, as shown in the cross-sectional views of Figures 7 and 8, the cover 4 is joined by welding in a state in which the opening end of the protruding portion 232 of the protruding opening 23 is butted against a flat portion 41 formed around the entire periphery inside the opening 40 of the cover 4.

[0020] In this embodiment, a gap 7 is formed between the lower end of the flange portion 231 and the upper end of the cover 4. Therefore, a marking 6 (described later) provided on the outer periphery of the protrusion 232 is visible through this gap 7 and functions as a marker indicating the position of the elastic member 5. This marking 6 will be described in detail later.

[0021] The elastic member 5 is provided on the fixture body 2 and is used to attach the fixture body 2 to a mounting hole in a ceiling material. In this embodiment, the elastic member 5 is made of a leaf spring. The elastic member 5 may be any member that can elastically deform and exert elastic force to attach the lighting fixture to the mounting hole in a ceiling material. For example, a clip or the like may be used.

[0022] As shown in FIGS. 9 and 10 , the elastic member 5 of this embodiment is a leaf spring obtained by bending a single long metal plate. The elastic member 5 has a narrow portion 51 in the center of its length that is narrower than both ends. Both sides of the central narrow portion 51 are bent into an accordion-like shape. Therefore, the elastic member 5 has, in order from the narrow portion 51 side, a pair of first bent portions 52, 52, a pair of second bent portions 53, 53, and a pair of third bent portions 54, 54. Because the elastic member 5 is elastically deformable in the longitudinal direction, it generates an elastic force radially outward from the fixture body 2, i.e., in the direction extending from the fixture body 2, thereby enabling the lighting fixture 1 to be attached to the mounting hole.

[0023] Specifically, when attaching lighting fixture 1 to a mounting hole in a ceiling material, the bellows at both ends of elastic member 5 are folded by hand, and lighting fixture 1 is inserted into the mounting hole from the room side. When elastic member 5 passes through the mounting hole, elastic member 5 elastically deforms in a direction that protrudes from fixture body 2 in the ceiling space. In this way, lighting fixture 1 is attached to the mounting hole.

[0024] Conventionally, a single, elongated leaf spring with a uniform width is typically used as an elastic member for attaching a lighting fixture. In this case, the larger the lighting fixture, the greater the required elastic force, which in turn leads to a larger leaf spring. A larger leaf spring requires a larger mounting space to secure the leaf spring to the fixture body, making it difficult to miniaturize the circuit board and potentially interfering with other components. In contrast, in this embodiment, as shown in FIGS. 3 , 7 , and 8 , the central narrow portion 51 of the elastic member 5 is sandwiched between an upper case 362 constituting the upper portion of the fixture body 2 and a heat sink 34 provided on the circuit board 32 on the side opposite the light source 31, and is fixed to the upper portion of the fixture body 2 with a screw 364. This reduces the mounting space for the elastic member 5, increasing design flexibility and enabling the miniaturization of the circuit board 32 integrated with the multiple LEDs constituting the light source 31. This ultimately allows for the miniaturization of the lighting fixture 1. The screw 364 is also a screw for fixing the above-mentioned case 36 to the top of the fixture body 2, and this screw 364 fastens the light source module 3 including the substrate 32 etc. and the elastic member 5 together to the top of the fixture body 2.

[0025] The width of narrow portion 51 of elastic member 5 is preferably equal to the width of the head of screw 364, which is a fastening member for fixing elastic member 5 to fixture body 2. This allows elastic member 5 to be fixed to fixture body 2 more reliably, and allows board 32 and, in turn, lighting fixture 1 to be made more compact. The leaf springs constituting elastic member 5 may be configured so that their width narrows from both longitudinal ends toward narrow portion 51, for example. In this case, further miniaturization of board 32 and, in turn, lighting fixture 1 can be expected.

[0026] As shown in FIGS. 11 to 14 , the marking 6 in this embodiment is provided on the protrusion 232 and indicates the position of the elastic member 5 in the circumferential direction of the fixture body 2. As described above, in this embodiment, a gap 7 is formed between the lower end of the flange 231 and the upper end of the cover 4. Therefore, the marking 6 provided on the outer periphery of the protrusion 232 is visible through this gap 7 and functions as a marker indicating the position of the elastic member 5. However, because this gap 7 is small, the marking 6 in this embodiment is not easily visible from the eye level of a person inside the bathroom unit, for example. However, it is easily visible when a lighting replacement worker approaches using a stepladder or the like. The marking 6 may be provided on the cover 4 instead of the protrusion 232. In this case, if the cover 4 is transparent or translucent, a convex portion can be provided on the inner circumferential surface of the cover 4, for example, to create a difference in shade, which can function as a marking.

[0027] 13, the marking 6 is arranged so as to at least partially overlap with the elastic member 5 in the circumferential direction of the instrument body 2. That is, the positions of the marking 6 and the elastic member 5 at least partially overlap in the circumferential direction. This makes it possible to easily grasp the position of the elastic member 5 by using the marking 6. The positions of the marking 6 and the elastic member 5 in the up-down direction perpendicular to the circumferential direction are not particularly limited.

[0028] As shown in Fig. 14, the protrusion 232 has a stepped portion 60 that extends circumferentially on the outer peripheral surface of the protrusion 232 and protrudes downward. As shown in Figs. 7 and 12, the cover 4 has a claw portion 9 that protrudes from the inner peripheral surface of the cover 4 and is locked in the vertical direction by the stepped portion 60. This prevents the cover 4 from falling off even if the welded portion of the cover 4 comes loose. The marking 6 will be described in detail later.

[0029] In this embodiment, as shown in Fig. 7, the claw portion 9 is provided within the thickness of the cover 4 side. As a result, there is no significant change in the thickness of the protruding portion 232 side, which is different from the situation where a slide space is formed when the mold is removed, for example, when a recess or notch is provided on the protruding portion 232 side, and therefore there is no significant effect on light emission. That is, R1 in Fig. 7 represents the uniform light emission region, and R2 represents the non-uniform light emission region, and it can be seen that the uniform light emission region R1 is large, enabling more uniform light emission.

[0030] The marking 6 will be described in more detail. Various shapes can be given as the shape of the marking 6. When a gap 7 is formed between the lower end of the flange portion 231 and the upper end of the cover 4, markings such as those shown in Figs. 15 to 20 can be given as examples.

[0031] 15 , the marking 6 has a first circumferential protrusion 611 formed on the flange portion 231 side of the protrusion 232 of the protrusion opening 23, excluding a portion of the circumferential direction; a vertical protrusion 612 extending from one circumferential end of the first circumferential protrusion 611 to the vicinity of the opening 233; and a second circumferential protrusion 613 extending circumferentially from the lower end of the vertical protrusion 612 toward the other end of the first circumferential protrusion 611. These protrusions form a stepped portion 60 that extends circumferentially and protrudes downward. A protrusion 614 that protrudes relatively little from the second circumferential protrusion 613 to the flange portion 231 is also formed, and the claws 9 of the cover 4, which will be described later, ride over this protrusion 614, thereby engaging with the stepped portion 60.

[0032] The first aspect of this marking 6 is visible through gap 7 formed between the lower end of flange 231 and the upper end of cover 4, due to the circumferential change in shape of protrusion 232 on the flange 231 side. Since this first aspect of marking 6 has step 60, by providing cover 4 with claw 9 that protrudes from the inner circumferential surface of cover 4, claw 9 is vertically locked by step 60. This prevents cover 4 from falling off even if the welding comes loose. According to this first aspect of marking 6, when an operator grips marking 6 with their hands to remove lighting fixture 1 from the mounting hole, the above-mentioned convex portions that make up step 60 can prevent cover 4 from bending, thereby preventing the welding from coming loose.

[0033] 16 , the marking 62 includes a circumferential protrusion 621 formed on the flange 231 side of the protrusion 232 of the protrusion opening 23, excluding a portion of the circumferential direction, and a vertical protrusion 622 extending from one circumferential end of the circumferential protrusion 621 to the vicinity of the opening 233. Similar to the first embodiment, the marking 62 of the second embodiment is visible through the gap 7 formed between the lower end of the flange 231 and the upper end of the cover 4. The marking 62 of the second embodiment can prevent the cover 4 from bending when the lighting fixture 1 is removed, thereby preventing the weld from coming loose. The marking 62 of the second embodiment does not have a portion where the radial dimension increases from the flange 231 toward the opening 233, which facilitates removal from the mold when the fixture body 2 is molded, thereby reducing mold costs.

[0034] 17 includes a circumferential protrusion 631 formed on the flange portion 231 side of the protrusion 232 of the protrusion opening 23 except for a portion of the circumferential direction, and a vertical protrusion 632 extending from the flange portion 231 to the vicinity of the opening 233 in the portion where the circumferential protrusion 631 is not formed, and having a narrower width on the flange portion 231 side than on the opening 233 side. Similar to the first embodiment described above, the third embodiment of the marking 63 is visible through the gap 7 formed between the lower end of the flange portion 231 and the upper end of the cover 4. The third embodiment of the marking 63 more reliably prevents the cover 4 from bending when the lighting fixture 1 is removed, and more reliably prevents the weld from coming loose.

[0035] 18 includes a circumferential protrusion 641 formed on the flange portion 231 side of the protrusion 232 of the protrusion opening 23, excluding a portion of the circumferential direction, and a pair of vertical protrusions 642, 642 extending to the vicinity of the opening 233 at both circumferential ends of the circumferential protrusion 641. Similar to the first embodiment described above, the fourth embodiment of the marking 64 is visible through the gap 7 formed between the lower end of the flange portion 231 and the upper end of the cover 4. The fourth embodiment of the marking 64 can prevent the cover 4 from bending when the lighting fixture 1 is removed, can prevent the welding from coming off, and can reduce mold costs when the fixture body 2 is molded.

[0036] 19 has a circumferential protrusion 651 formed on the flange portion 231 side of the protrusion 232 of the protrusion opening 23 except for a portion of the circumferential direction, and a vertical protrusion 652 extending from the flange portion 231 to the vicinity of the opening 233 in the portion where the circumferential protrusion 651 is not formed. This fifth embodiment of the marking 65 is visible through the gap 7 formed between the lower end of the flange portion 231 and the upper end of the cover 4, as with the first embodiment described above. This fifth embodiment of the marking 65 can prevent the cover 4 from bending when the lighting fixture 1 is removed, prevent the welding from coming off, and reduce mold costs when molding the fixture body 2.

[0037] 20 shows a sixth aspect of the marking 66 in which the vertical protrusion 652 in the fifth aspect described above is divided into two in the circumferential direction to form a pair of vertical protrusions 662, 662. This sixth aspect of the marking 66 provides the same effect as the fifth aspect.

[0038] When no gap 7 is formed between the lower end of the flange portion 231 and the upper end of the cover 4, markings such as those shown in FIGS. 21 and 22 are exemplified.

[0039] A seventh embodiment of the marking 67 shown in Fig. 21 has a circumferential protrusion 671 formed over the entire outer periphery on the flange portion 231 side of the protrusion 232 of the protrusion opening 23, and a vertical protrusion 672 extending from a circumferential part of the circumferential protrusion 671 toward the opening 233. An eighth embodiment of the marking 68 shown in Fig. 22 has a circumferential protrusion 681 formed over a wide area over the entire periphery from the flange portion 231 side of the protrusion 232 of the protrusion opening 23 to the vicinity of the opening 233, and a vertical cutout 682 formed by cutting out a circumferential part of the circumferential protrusion 681 in the vertical direction.

[0040] In the seventh and eighth aspects of these markings 67, 68, there is no change in shape in the circumferential direction at the top of the protrusion 232, so even if there is a gap 7 between the lower end of the flange portion 231 and the upper end of the cover 4, they will not function as markings. These markings 67, 68 become visible through the cover and function as markings by using a translucent cover that transmits light rather than diffusing it. As with the first aspect described above, the seventh and eighth aspects of these markings 67, 68 can prevent the cover 4 from bending when the lighting fixture 1 is removed, prevent the welding from coming loose, and reduce mold costs when molding the fixture body 2.

[0041] Conventionally, when removing a recessed-ceiling lighting fixture attached to a mounting hole in a ceiling material, a worker would grasp the outer periphery of the cover exposed to the room side with his or her hand and swing the lighting fixture to pull it out of the mounting hole toward the room. However, depending on the relationship between the swing direction and the position of the elastic member, removing the lighting fixture can be difficult. Specifically, as shown in Figure 23, depending on the swing direction, a part of the lighting fixture 1, such as the leg 365 of the light source module 3, can interfere with the underside of the ceiling material 100 or its surrounding area, making it difficult to remove the lighting fixture 1.

[0042] In contrast, according to the above-mentioned marking configurations, the position of the elastic member 5 can be easily grasped, and as a result, as shown in Figure 24, it becomes easy to swing the elastic member 5 in the direction of elastic deformation, and as a result, the lighting device 1 can be easily removed from the mounting hole.

[0043] The marking 6 may be configured as a groove formed on either the outer periphery of the protrusion 232 or the inner periphery of the cover 4. This allows the position of the elastic member 5 to be easily ascertained and the lighting device 1 to be easily removed without adversely affecting the external design of the lighting device 1.

[0044] A gap (not shown) may be formed between the outer peripheral surface of protrusion 232 and the inner peripheral surface of cover 4. In this case, it is preferable that either protrusion 232 or cover 4 has a convex portion that protrudes from either the outer peripheral surface of protrusion 232 or the inner peripheral surface of cover 4 so as to fill a portion of this gap. This convex portion may form marking 6. In this case, if cover 4 is a translucent cover, the convex portion creates a difference in shading, which can function as a marking. In addition, when cover 4 is pressed with fingers to remove lighting fixture 1, the convex portion can prevent deflection of cover 4. This reduces the amount of deformation at the welded portion, preventing cover 4 from coming loose.

[0045] The present disclosure is not limited to the above-described embodiments, and modifications and improvements within the scope that can achieve the object of the present disclosure are included in the present disclosure. [Explanation of symbols]

[0046] 1 lighting fixture, 2 fixture body, 3 light source module, 4 cover, 5 elastic member, 6 marking, 7 gap, 9 claw portion, 23 protruding opening, 31 light source, 32 substrate, 34 heat sink, 51 narrow portion, 60 step portion, 231 flange portion, 232 protruding portion, 233 opening, 364 screw

Claims

1. a fixture body that is inserted into a mounting hole formed in a ceiling material and has a protruding portion that protrudes from the ceiling surface and has an outer diameter larger than the opening diameter of the mounting hole; a light source module provided in the fixture body; a light-transmitting cover attached to the protrusion and covering the protrusion; an elastic member provided on the tool body for attaching the tool body to the attachment hole; a marking provided on either the protrusion or the cover, the marking indicating the position of the elastic member in the circumferential direction of the fixture body.

2. The lighting fixture according to claim 1 , wherein the marking is arranged so as to at least partially overlap the elastic member in the circumferential direction of the fixture body.

3. The lighting fixture according to claim 1 , wherein the marking is a groove formed on either an outer periphery of the protrusion or an inner periphery of the cover.

4. The fixture body has a flange portion that protrudes radially outward from the protrusion between the protrusion and the ceiling surface, A gap is formed between the lower end of the flange portion and the upper end of the cover, The lighting fixture according to claim 1 , wherein the marking is provided on an outer periphery of the protrusion and is visible through the gap.

5. a gap is formed between an outer circumferential surface of the protrusion and an inner circumferential surface of the cover; The lighting fixture according to claim 1 , wherein either the protrusion or the cover has a convex portion that protrudes from either an outer peripheral surface of the protrusion or an inner peripheral surface of the cover so as to fill a part of the gap.

6. the protruding portion is provided on the outer peripheral surface of the protruding portion so as to extend in a circumferential direction and has a stepped portion that protrudes downward, The lighting fixture according to claim 1 , wherein the cover has a claw portion that protrudes from an inner circumferential surface of the cover and is engaged in the vertical direction by the step portion.

7. the elastic member is a leaf spring formed by bending a long plate material and elastically deformable in a direction extending from the tool body, 7. The lighting fixture according to claim 1, wherein the leaf spring has a narrow portion in the center in the longitudinal direction, the narrow portion being narrower than both ends and fixed to an upper portion of the fixture body.

8. The lighting fixture according to claim 7 , wherein the width of the leaf spring narrows from both longitudinal ends toward the narrow portion.

9. 9. The lighting fixture according to claim 7, wherein the width of the narrow portion is equal to the width of a head of a fastening member for fixing the leaf spring to the fixture body.

10. the light source module includes a substrate, a light source provided on the substrate, and a heat sink provided on the substrate on a side opposite to the light source; The lighting fixture according to claim 7 , wherein the narrow portion is sandwiched between the heat sink and an upper portion of the fixture body.

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