Lighting fixtures

Abstract

To provide a lighting fixture that allows for easy expansion of the optical cover placement area and suppresses reflection of the ground wire into the illumination light. [Solution] The lighting fixture 1 comprises a metal body 10, a circuit board 80 that is stationary to the body 10 and on which a light-emitting part is mounted, and an inner cover 20 that covers the circuit board 80, wherein the body 10 and the inner cover 20 have holes at substantially the same position when viewed from the height direction. The lighting fixture 1 comprises a screw 56 including a first housing part housed in a hole in the inner cover 20 and a second housing part housed in a hole in the body 10, a power supply component that is fixed to the building and used for supplying power from the outside, and a ground wire that is electrically connected to a grounded metal part. The ground wire is electrically connected to the body 10 via the screw 56.

Description

Technical Field

[0001] The present disclosure relates to lighting fixtures.

Background Art

[0002] Conventionally, there is a lighting fixture described in Patent Document 1. This lighting fixture is attached to a ceiling or the like, and includes a main body, a light source attached to the main body, and an optical cover that covers the light source.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to prevent electric shock, a lighting fixture includes an earth wire for moving electric charges from the metal main body to the ground when the main body is charged due to electric leakage or the like. In the process of developing a new product, the inventor of the present case found the following new problems regarding the earth wire. Specifically, as shown in FIG. 16, when the metal main body 110 has an annular central portion 110a arranged so as to surround a power supply component (not shown), for example, by connecting one end of the earth wire to the earth wire attachment portion 128 of the central portion 110a and connecting the other end of the earth wire to the earth terminal of the power supply component arranged so as to be surrounded by the central portion 110a, the main body 110 and the ground can be electrically connected without degrading the lighting performance of the lighting fixture 101.

[0005] However, if the central metal part is reduced to expand the area for the optical cover in order to achieve beautiful illumination or weight reduction, one end of the ground wire 251 must be connected to the outer edge 210a of the main body 210, as shown in Figure 17. As a result, when the other end of the ground wire is electrically connected to the power supply component 205 in the center of the lighting fixture 201, the ground wire 251 crosses the light-emitting side of the optical cover 220 from the outside to the center of the lighting fixture, causing the shadow of the ground wire to be reflected in the illumination light. Therefore, the purpose of this disclosure is to provide a lighting fixture that makes it easy to expand the area for the optical cover and suppresses the reflection of the ground wire in the illumination light. [Means for solving the problem]

[0006] To solve the above problems, the lighting fixture according to this disclosure comprises a metal body, a substrate that is stationary with respect to the body and on which a light-emitting part is mounted, and an optical cover that covers the substrate, wherein the body and the optical cover have holes at substantially the same position when viewed from the height direction, and further comprises a metal rod-shaped member including a first housing part housed in the hole of the optical cover and a second housing part housed in the hole of the body, a power supply component that is fixed to the building and used for supplying power from the outside, and an earth wire electrically connected to a grounded metal component, wherein the earth wire is electrically connected to the body via the rod-shaped member. [Effects of the Invention]

[0007] According to the lighting fixture described herein, the area for placing the optical cover can be easily expanded, and reflections of the ground wire in the illumination light can also be suppressed. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a lighting fixture according to one embodiment of the present disclosure, as seen from a diagonally downward angle. [Figure 2] This is a perspective view of the lighting fixture from a diagonal upward angle. [Figure 3] This is a perspective view of the light fixture with the outer cover removed, seen from a diagonal downward angle. [Figure 4] This is a perspective view of the lighting fixture from a diagonal downward angle, after the inner cover has been removed from the state shown in Figure 3. [Figure 5] This is a magnified perspective view of the area surrounding the grounding structure in a lighting fixture. [Figure 6] This is an exploded perspective view of the main components of the earth structure. [Figure 7] This is a perspective view of the earthing cap, seen from a diagonal downward angle. [Figure 8] This is a perspective view of the mounting base for the grounding structure, seen from a diagonal downward angle. [Figure 9] This is an enlarged perspective view of the area around the grounding structure mounting point in a lighting fixture with the inner cover and grounding structure removed, viewed from a diagonal downward angle. [Figure 10] This is an enlarged perspective view of the area around the grounding structure mounting part, seen from a diagonal downward angle, after the circuit board has been further removed from the state shown in Figure 9. [Figure 11] This is a perspective view of the area around the screw tightening hole for the grounding structure on the main unit, seen from a diagonal downward angle. [Figure 12] This is an enlarged cross-sectional view of a lighting fixture cut through a plane passing through the central axis of the metal spacer. [Figure 13] This is a perspective view illustrating an example of the installation procedure for an earthing structure. [Figure 14] This is a perspective view illustrating an example of the installation procedure for an earthing structure. [Figure 15] This is a perspective view illustrating an example of the installation procedure for an earthing structure. [Figure 16] This diagram illustrates the problem identified by the inventor of this case. [Figure 17] This diagram illustrates the problem identified by the inventor of this case. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. In the following, when multiple embodiments, modification examples, etc. are included, it is initially assumed that new embodiments can be constructed by appropriately combining their characteristic parts. Also, in the following examples, the same reference numerals are given to the same configurations in the drawings, and overlapping explanations are omitted. Further, the plurality of drawings include schematic diagrams, and the dimensional ratios of each component in the vertical, horizontal, height, etc. between different drawings do not necessarily match.

[0010] In the following description, when terms related to the vertical direction such as below, above, lower side, and upper side are used, they indicate the side in the vertical direction or the direction related to the vertical direction in which the lighting fixture 1 is located when installed on the ceiling. Also, when the height direction is mentioned in the following description, the height direction indicates the height direction of the lighting fixture 1, and when the orthogonal direction is mentioned, the orthogonal direction indicates the direction orthogonal to the height direction.

[0011] The lighting fixture 1 of the embodiment described below has a shape in which the center and the radial direction can be specified in a plan view when viewed from the height direction. More specifically, the outer cover 30 of the lighting fixture 1 of the embodiment has a dome shape and has a circular shape in a plan view when viewed from the lower side in the height direction. In the following description, when the radial direction is mentioned, the radial direction indicates the radial direction of the outer cover 30 in the plan view, when the inner side is mentioned, the inner side indicates the inner side in the radial direction, and when the outer side is mentioned, the outer side indicates the outer side in the radial direction. Also, in the following description, when the circumferential direction is mentioned, the circumferential direction indicates the circumferential direction of the outer cover 30 in the plan view.

[0012] In the present embodiment, in a plan view when viewed from the height direction, the main body 10 has an annular shape. The above-mentioned radial direction coincides with the radial direction of the main body 10, and the above-mentioned circumferential direction coincides with the circumferential direction of the main body 10. Also, among the components described below, components not described in the independent claims indicating the most上位 concept are optional components and not essential components. Also, in this specification, the term "substantially" is used when approximately describing the direction in which a member or the like extends or when expressing the general shape of a member or the like.

[0013] FIG. 1 is a perspective view of a lighting fixture 1 according to an embodiment of the present disclosure as viewed from obliquely below, and FIG. 2 is a perspective view of the lighting fixture 1 as viewed from obliquely above. Further, FIG. 3 is a perspective view of the lighting fixture 1 with the outer cover 30 removed as viewed from obliquely below, and FIG. 4 is a perspective view of the lighting fixture 1 with the inner cover 20 further removed as viewed from obliquely below in the state shown in FIG. 3.

[0014] Referring to FIGS. 1 to 4, the lighting fixture 1 is attached to a fixture attachment portion (not shown) provided on the ceiling of a building, and includes a power supply component 5 used for power supply from the outside, a metal main body 10 that is stationary with respect to the power supply component 5 and is arranged along the ceiling, a substrate 80 that is stationary with respect to the main body 10 and on which a light emitting portion 3 is mounted, an inner cover 20 that covers the substrate 80, an outer cover 30 that is arranged to cover the inner cover 20, and a plurality of receivers 8 that support the outer cover 30 and are attached to the main body 10 at intervals in the circumferential direction.

[0015] In the lighting fixture 1, the inner cover 20 is locked to the power supply component 5 so as to be relatively rotatable, and the inner cover 20 cannot fall with respect to the power supply component 5. The inner cover 20 and the receivers 8 are fixed to the main body 10 and are integrated with the main body 10. Further, the outer cover 30 is locked to the receivers 8. From this, the power supply component 5, the main body 10, the inner cover 20, and the outer cover 30 are integrally integrated.

[0016] The power supply component 5 has a plurality of protrusions 5a (see FIG. 4) that protrude radially outward in the middle portion in the height direction and extend in the circumferential direction. Further, the inner cover 20 has protrusions (not shown) that protrude radially inward on the inner peripheral surface and extend in the circumferential direction. By locking the protrusion of the inner cover 20 to the protrusion 5a of the power supply component 5 in a state where the protrusion of the inner cover 20 is located above the protrusion 5a of the power supply component 5, the inner cover 20 is locked to the power supply component 5 in a relatively rotatable state and cannot fall from the power supply component 5.

[0017] The receiver 8 has a locking claw 8a (see Figure 2) on its upper side. The tip of the locking claw 8a is bent and locked to the upper surface of the main body 10. This locking fixes the receiver 8 to the main body 10. The inner cover 20 has a fixing portion 20a (see Figure 3) that extends in a direction approximately perpendicular to the height direction. The inner cover 20 is fixed to the main body 10 by screwing this fixing portion to the main body 10. The outer cover 30 has locking protrusions (not shown) that project radially inward at circumferential intervals on the inner periphery of the upper opening. The locking protrusions are housed in and locked into recesses 32 (see Figure 3) provided on the radially outward end face of the receiver 8. As a result, the outer cover 30 is fixed to the main body 10. Note that any integrated structure other than the integrated structure described above may be adopted as the integrated structure of the main components of the lighting fixture 1.

[0018] The inner cover 20 and outer cover 30 are optical covers and are made of a light-transmitting resin material, such as polycarbonate, acrylic, or silicone. As shown in Figure 4, the lighting fixture 1 includes a substrate 80 fixed to the main body 10. The substrate 80 is fixed to the lower surface of the main body 10 by fixing means, such as screws or adhesive. The substrate 80 has an annular shape, and a through hole 80a, which is made of a cylindrical hole or the like, is provided in the center of the substrate 80. Multiple electronic components 7 that constitute a control device and a power supply device are mounted on the substrate 80. Multiple LED (Light Emitting Diode) chips 83 are also mounted on the substrate 80. Multiple LED chips 83 are an example of a light-emitting unit 3.

[0019] Multiple LED chips 83 are arranged radially outward from the power supply component 5, for example, radially outward from the multiple electronic components 7. In this embodiment, the multiple LED chips 83 are arranged circumferentially at intervals along the outer edge of a substrate 80 which is substantially square in plan view, surrounding a through hole 80a, and are densely arranged at the four corners of the substrate 80. The case in which the light-emitting section 3 is composed of multiple LED chips 83 has been described. However, the light-emitting section may be composed of a single LED chip. Alternatively, the light-emitting section may be composed of one or more light-emitting element chips other than LED chips, such as one or more semiconductor laser element chips or one or more solid-state light-emitting element chips. Furthermore, as the solid-state light-emitting element chip, an organic EL (Electro-Luminescence) element chip or an inorganic EL element chip may be used.

[0020] The power supply unit and control unit are electrically connected to an external power supply via the power line 39 and the wiring within the power supply component 5. The power supply unit converts AC power from the outside into DC power and steps it down to an appropriate voltage. When the control unit receives a signal indicating that a person has been detected from, for example, a motion sensor, or a signal indicating that the light is turned on from the control unit, it turns on the switching unit for controlling the light source installed in the power supply unit. This on control supplies power to the light source, and light is emitted from the light source. The switching unit is composed of, for example, a transistor.

[0021] As shown in Figure 3, the inner cover 20 defines a roughly donut-shaped internal chamber 28. The substrate 80 is placed inside the internal chamber 28 of the inner cover 20. The inner cover 20 is a diffusion cover that diffuses the light emitted by the light-emitting unit 3, diffusing the light from the light-emitting unit 3 and distributing it toward the outer cover 30. The light that passes through the outer cover 30 is emitted downward as illumination light.

[0022] If the metal body 10 becomes charged due to a short circuit, there is a risk of electric shock. An earthing structure is necessary to transfer the charge accumulated on the body 10 to the ground. Next, the earthing structure of the lighting fixture 1 will be described. Figure 5 is an enlarged perspective view of the area around the earthing structure 50 in the lighting fixture 1, and Figure 6 is an exploded perspective view of the main components of the earthing structure 50.

[0023] As shown in Figure 5, one end of the ground wire 51 is connected to the ground structure 50. The other end of the ground wire 51 is connected to the ground wire mounting portion (not shown) of the power supply component 5. When the ground wire 51 is attached to the ground wire mounting portion, the ground wire 51 is electrically connected to the ground and also to a metal component (not shown) included in the power supply component 5. Note that the wiring shown as 39 in Figure 5 is a power line that electrically connects the power supply unit mounted on the circuit board 80 to the power supply component 5.

[0024] As shown in Figure 6, the grounding structure 50 includes a cap 52, a mounting base 53, a cylindrical metal spacer 54, a crimp terminal 55 including an annular portion 55a, and a screw 56 as an example of a rod-shaped member. The cap 52 is a resin component and is made of a translucent resin, such as polycarbonate, acrylic, or silicone. By making the cap 52 of a translucent resin, it becomes easier to emit bright, uniform, and thin illumination light. As shown in Figure 7, the cap 52 has a flat plate portion 71 that is substantially rectangular in plan view, and the flat plate portion 71 is provided with an elongated plate-shaped recess 72 and a through hole 73. The through hole 73 communicates with the recess 72.

[0025] As shown in Figure 8, the mounting base 53 is a single resin component and includes a cylindrical portion 75 and an elongated flat plate portion 76 that extends in a perpendicular direction. In this embodiment, the cylindrical portion 75 has a cylindrical shape. The flat plate portion 76 is connected to one end of the cylindrical portion 75 in the axial direction. A pair of vertical wall portions (ribs) 77 are provided on the lower surface of the flat plate portion 76. The pair of vertical wall portions (ribs) 77 extend in the direction of extension of the flat plate portion 76 and are spaced apart from each other and arranged substantially parallel to each other. As shown in Figure 5, the flat plate portion 76 has a shape corresponding to the recess 72 of the cap 52 and is housed in a position within the recess 72. In addition, a portion of the ground wire 51 is positioned between the pair of vertical wall portions 77.

[0026] Figure 9 is an enlarged perspective view of the area around the grounding structure mounting part of the lighting fixture 1 with the inner cover 20 and grounding structure 50 removed, viewed from a diagonal downward side. Figure 10 is an enlarged perspective view of the area around the grounding structure mounting part, viewed from a diagonal downward side, with the substrate 80 further removed from the state shown in Figure 9. As shown in Figures 9 and 10, the main body 10 and the substrate 80 have holes 10a and through holes 80b at approximately the same position when viewed from the height direction. In this embodiment, both the through hole 80b in the substrate 80 and the hole 10a in the main body 10 are through holes, but the hole 10a in the main body 10 may be a closed-end hole.

[0027] When viewed from the height direction, the through hole 73 of the cap 52 (see Figure 7), the through hole 80b of the substrate 80, and the hole 10a of the main body 10 are located in approximately the same position and overlap each other. Figure 11 is a perspective view of the area around the hole 10a in the main body 10, viewed from diagonally below. As shown in Figure 11, the main body 10 has a cylindrical portion 15 that protrudes downward, and the hole 10a has an annular recess 13. The recess 13 can be easily manufactured using press working or the like. The cylindrical portion 15 has a screw hole 16. The screw hole 16 communicates with the annular recess 13 and extends downward from the annular recess 13. The inner diameter of the inner circumferential surface 13a of the annular recess 13 is slightly smaller than the outer diameter of the cylindrical spacer 54.

[0028] Figure 12 is an enlarged cross-sectional view of the lighting fixture 1 when cut by a plane passing through the central axis of the spacer 54. As shown in Figure 12, the cylindrical portion 75 of the mounting base 53 is fitted into the through hole 73 of the cap 52. The cylindrical spacer 54 is inserted through the cylindrical hole 75a of the cylindrical portion 75. After the annular portion 55a of the crimp terminal 55 and the annular washer 57 are arranged in that order on the lower end face of the spacer 54, the shaft portion 56a of the screw 56 is inserted in that order through the through hole of the washer 57, the through hole of the annular portion 55a, and the screw hole of the spacer 54.

[0029] A portion of the cylindrical part 75 of the mounting base 53 is housed in the through hole 80b of the substrate 80. The lower end of the spacer 54 is housed in the annular recess 13. When the screw 56 is tightened using a tool (not shown) through the tool insertion hole in the head 56b of the screw 56, the tip of the screw 56 is tightened into the screw hole 16 of the cylindrical part 15, and the lower end face of the spacer 54 presses against the bottom surface of the recess 13. As a result, the grounding structure 50 is firmly fixed to the substrate 80 and the main body 10.

[0030] Figures 13 to 15 are perspective views illustrating an example of the installation procedure for the grounding structure 50. Note that the grounding wire 51 and washer 57 are not shown in Figures 13 to 15. As shown in Figure 13, the inner cover 20 is provided with a recess 29 that is approximately rectangular in plan view. At least a portion of the flat plate portion 71 of the cap 52 can be accommodated in the recess 29 and is slidable radially inward within the recess 29 as indicated by arrow A. The inner cover 20 has a through hole 20b adjacent to the recess 29, and the opening of the through hole 80b in the substrate 80 is exposed to the outside of the inner cover 20 through the through hole 20b.

[0031] As shown in Figure 14, the cap 52 is moved radially inward, indicated by arrow A, until the through-hole 73 of the cap 52 aligns with the through-hole 80b of the substrate 80 when viewed from the height direction. Then, as shown in Figure 15, the cap 52 is screwed in near the through-hole 20c provided in the center of the inner cover 20 using a screw 59. On the other hand, the assembly 95 is manufactured by inserting the shaft of a screw 56 from the underside of the mounting base 53, which houses at least a portion of the spacer 54 in the cylindrical hole 75a (see Figure 12), through the through-hole of the washer 57, then the through-hole of the annular portion 55a, and then tightening it to a certain extent into the screw hole of the spacer 54.

[0032] Subsequently, the assembly 95 is moved upward in the height direction indicated by arrow B, and the mounting base 53 of the assembly 95 is positioned in the predetermined position on the cap 52. Then, the screw 56 is tightened into the screw hole 16 of the main body 10 to fix the ground structure 50 to the main body 10. As a result, the ground wire 51, which is electrically connected to the ground, is electrically connected to the main body 10 via the annular portion 55a of the crimp terminal 55 and the screw 56. Therefore, even if the main body 10 becomes charged due to leakage current or the like, the charged electricity can be moved to the ground via the screw 56, crimp terminal 55, and ground wire 51, thereby preventing electric shock.

[0033] As described above, the mounting base 53 has a pair of vertical wall sections 77, and a portion of the ground wire 51 is positioned between the pair of vertical wall sections 77. When the screw 56 is fastened to the main body 10, the crimp terminal 55 rotates in the direction of rotation of the shaft of the tool (driver). The pair of vertical wall sections 77 are provided to limit and suppress this rotation. The pair of vertical wall sections 77 is an example of a rotation suppression part that suppresses the rotation of the crimp terminal 55 when it is fastened with a screw.

[0034] As described above, the lighting fixture 1 comprises a metal body 10, a substrate 80 that is stationary with respect to the body 10 and on which a light-emitting unit 3 is mounted, and an inner cover 20 that covers the substrate 80. The body 10 and the inner cover 20 have holes 10a and through holes 20b at approximately the same positions when viewed from the height direction. The lighting fixture 1 further comprises a screw (metal rod-shaped member) 56 including a first housing part housed in the through hole 20b of the inner cover 20 and a second housing part housed in the hole of the body 10, a power supply component 5 that is fixed to a building (for example, the ceiling of a building) and used for supplying power from an external source, and an earth wire 51 that is electrically connected to a grounded metal component. The earth wire 51 is electrically connected to the body 10 via the screw 56.

[0035] According to this disclosure, the main body 10 is electrically connected to the ground using an ingenious method in which a screw (metal rod-shaped member) 56 is extended substantially in the height direction to electrically connect the metal parts inside and outside the inner cover 20. Therefore, even if the central metal part is reduced and the arrangement area of ​​the inner cover 20 is expanded for purposes such as beautiful illumination emission and weight reduction, the problem described with reference to Figure 17, namely the radial transposition of the light emission area of ​​the ground wire 51 on the outside of the inner cover 20, does not occur. Thus, the arrangement area of ​​the optical cover can be easily expanded, and reflection of the ground wire in the illumination light is virtually eliminated, making it easier to achieve weight reduction and emit stylish and beautiful illumination.

[0036] Furthermore, the substrate 80 may have a through hole 80a located in substantially the same position as the through hole 20b of the inner cover 20 and the hole 10a of the main body 10 when viewed from the height direction, and may include a third housing portion in which the screw 56 is housed in the hole of the substrate 80.

[0037] This configuration allows for greater flexibility in the arrangement of the circuit boards. Therefore, for example, instead of using multiple separate circuit boards, a single circuit board 80 can be used, making it easier to reduce the number of components. The lighting fixture may have a first circuit board on which a power supply is mounted, and a second circuit board on which a light-emitting unit is mounted and which is positioned at a distance from the first circuit board. The metal rod-shaped member may extend approximately in the height direction between the first and second circuit boards.

[0038] Furthermore, the grounded metal component may be included in the power supply component 5 that is attached to the ceiling, and the power supply component 5 may have a mounting portion for attaching the ground wire 51, and when the ground wire 51 is attached to the mounting portion, the ground wire 51 may be electrically connected to the metal component.

[0039] With this configuration, the end of the ground wire 51 opposite to the main body 10 can be easily electrically connected to the ground. Alternatively, the end of the ground wire opposite to the main body may be electrically connected to a metal component located outside the power supply component and grounded.

[0040] Furthermore, a cylindrical metal spacer 54 may be provided, which is positioned to surround at least a portion of the screw 56 around its entire circumference.

[0041] This configuration makes it easier to position the screw 56 with high precision. Furthermore, the lighting fixture does not necessarily need to include a spacer that surrounds at least a portion of the metal rod-shaped member around its entire circumference.

[0042] The mounting base 53 may also include a resin mounting base 53, which includes a cylindrical portion 75 that is positioned at least partially between the screw 56 and the through hole 80a of the substrate 80. At least a portion of the screw 56 may be housed in the cylindrical hole 75a of the cylindrical portion 75.

[0043] In this configuration, a cylindrical resin portion 75 is interposed between the metal screw 56 and the conductive portion mounted on the circuit board 80. Therefore, it is possible to reliably prevent short circuits between the conductive portion of the electronic component 7 mounted on the circuit board 80 and the screw 56. Note that the lighting fixture does not necessarily have to include a resin mounting base that includes a cylindrical portion, at least a part of which is positioned between the rod-shaped member and the hole in the circuit board.

[0044] Furthermore, the metal rod-shaped member may be a screw 56 including a head 56b, and the ground wire 61 may be electrically connected to the screw 56 via a crimp terminal 55 positioned between the head 56b and the end face of the spacer 54. If the screw is fixed to the main body using a resin member, tightening stress is applied to the resin member, which accelerates the deterioration of the resin member over time and makes it more prone to cracking.

[0045] In contrast, with this configuration, the metal rod-shaped screw 56 can be screw-fixed to the metal body 10 using a metal spacer 54, and the metal screw 56 can be fixed to the body 10 without any resin parts being interposed. Therefore, the durability of the lighting fixture 1 is likely to be excellent.

[0046] Furthermore, by using the crimp terminal 55, the ground wire 61 can be easily and reliably electrically connected to the metal rod-shaped member. Alternatively, the ground wire may be electrically connected to the metal rod-shaped member without using the crimp terminal. For example, one end of the ground wire may be made of bare wire, and this bare wire may be twisted and wrapped around the shaft of the metal rod-shaped member to electrically connect the ground wire to the metal rod-shaped member.

[0047] Furthermore, the mounting base 53 may include a cylindrical portion 75 that is positioned at least partially between the spacer 54 and the through hole 20b of the inner cover 20. The mounting base 53 may also have a rotation suppression portion that prevents the crimp terminal 55 from rotating when it is screwed in.

[0048] This configuration makes it easy to securely and easily fasten the screw 56 to the main body 10. The rotation suppression part may be, for example, provided in the mounting base and consisting of a through hole that accommodates a portion of the ground wire. The mounting base does not necessarily have to have a rotation suppression part to prevent the crimp terminal from rotating when it is screwed in.

[0049] Furthermore, the main body 10 may have a recess 13 for positioning one end of the spacer 54. When assembling the grounding structure, the spacer is fitted into a predetermined position such as the cylindrical hole in the mounting base, and then a rod-shaped member is inserted into the spacer. However, if the length of the spacer is long, the spacer is more likely to shift position relative to the mounting position.

[0050] In contrast, with this configuration, the main body 10 has a recess 13 for positioning one end of the spacer 54, so that the spacer 54 can be guided into its intended position. Therefore, even if a complex grounding structure 50 including the spacer 54 is adopted, the screw 56 can be quickly and firmly fixed in the predetermined position. Note that the main body does not necessarily have to have a recess for positioning one end of the spacer.

[0051] This disclosure is not limited to the above embodiments and their variations, and various improvements and modifications are possible within the scope of the claims of this application and their equivalents. For example, in the above embodiments, the screw 56, which extends substantially in the height direction, is electrically connected to the main body 10 by screwing it to the main body 10.

[0052] However, for example, a metal rod-shaped member extending substantially in the height direction may be electrically connected to the main body by press-fitting one end of the metal rod-shaped member into a hole in the main body. Alternatively, a metal rod-shaped member extending substantially in the height direction may be electrically connected to the main body by melting and fixing one end of the metal rod-shaped member to the main body using a molten part by plating or the like.

[0053] Furthermore, the lighting fixtures of this disclosure may have the following configurations. Configuration 1: A lighting fixture comprising a metal body, a substrate that is stationary relative to the body and on which a light-emitting part is mounted, and an optical cover that covers the substrate, wherein the body and the optical cover have holes at substantially the same position when viewed from the height direction, and further comprising a metal rod-shaped member including a first housing part housed in the hole of the optical cover and a second housing part housed in the hole of the body, a power supply component fixed to a building and used for supplying power from an external source, and an earth wire electrically connected to a grounded metal component, wherein the earth wire is electrically connected to the body via the rod-shaped member. Configuration 2: The lighting fixture according to Configuration 1, wherein the substrate has through holes located at substantially the same positions as the holes in the optical cover and the main body when viewed from the height direction, and includes a third housing portion in which the rod-shaped member is housed in the holes of the substrate. Configuration 3: The lighting fixture according to Configuration 1 or 2, wherein the metal component is included in a power supply component that is mounted on the ceiling, the power supply component has a mounting portion for attaching the ground wire, and when the ground wire is attached to the mounting portion, the ground wire is electrically connected to the metal component. Configuration 4: A lighting fixture according to any one of Configurations 1 to 3, comprising a cylindrical metal spacer positioned to surround at least a portion of the rod-shaped member around its entire circumference. Configuration 5: The lighting fixture according to Configuration 2, comprising a resin mounting base including a cylindrical portion which is positioned between the rod-shaped member and the hole in the substrate, and in which at least a portion of the rod-shaped member is housed in the hole in the cylindrical portion. Configuration 6: The lighting fixture according to Configuration 4, wherein the rod-shaped member is a screw including a head, and the ground wire is electrically connected to the rod-shaped member via a crimp terminal positioned between the head and the end face of the spacer. Configuration 7: The lighting fixture according to Configuration 6, comprising a mounting base including a cylindrical portion which is at least partially positioned between the spacer and the hole in the optical cover, and the mounting base having a rotation suppression portion which prevents the crimp terminal from rotating when it is screwed in. Configuration 8: The lighting fixture according to configuration 4, 6, or 7, wherein the main body has a recess for positioning one end of the spacer. [Explanation of symbols]

[0054] 1 Lighting fixture, 3 Light-emitting part, 5 Power supply component, 7 Electronic component, 8 Mounting bracket, 10 Main body, 10a Hole in the main body, 13 Annular recess, 15 Cylindrical part of the main body, 16 Screw hole in the cylindrical part of the main body, 20 Inner cover, 20a Fixing part of the inner cover, 20b Through hole in the inner cover, 20c Through hole in the center of the inner cover, 28 Internal chamber, 29 Recess in the inner cover, 30 Outer cover, 32 Recess in the mounting bracket, 39 Power line, 50 Grounding structure, 51 Ground wire, 52 Cap, 53 Mounting base, 54 Spacer, 55 Crimp terminal, 55a Annular part of the crimp terminal, 56 Screw, 56a Shaft of the screw, 56b Head of the screw, 57 Washer 71 Flat part of the cap, 72 Recess in the flat part of the cap, 73 Through hole in the flat part of the cap, 75 Cylindrical part of the mounting base, 75a Cylindrical hole in the cylindrical part of the mounting base, 76 Flat part of the mounting base, 77 Vertical wall part, 80 Substrate, 80a Through hole in the center of the substrate, 80b Through hole in the substrate, 83 LED chip, 95 Assembly.

Claims

1. A metal body, The circuit board, which is stationary relative to the main body and has a light-emitting section mounted on it, The system comprises an optical cover that covers the substrate, The main body and the optical cover have holes at substantially the same position when viewed from the height direction. A metal rod-shaped member including a first housing portion housed in a hole in the optical cover and a second housing portion housed in a hole in the main body, Power supply components that are fixed to the building and used for supplying power from the outside, It further comprises an earth wire electrically connected to a grounded metal component, The ground wire is electrically connected to the main body via the rod-shaped member. Lighting fixtures.

2. The substrate has through holes that are located in substantially the same positions as the holes in the optical cover and the holes in the main body when viewed from the height direction. The lighting fixture according to claim 1, wherein the rod-shaped member includes a third housing portion in which the rod-shaped member is housed in a hole in the substrate.

3. The aforementioned metal part is included in the power supply component that is mounted on the ceiling. The power supply component has a mounting portion for attaching the ground wire, The lighting fixture according to claim 1, wherein when the ground wire is attached to the mounting portion, the ground wire is electrically connected to the metal component.

4. The lighting fixture according to claim 1, further comprising a cylindrical metal spacer arranged to surround at least a portion of the rod-shaped member over its entire circumference.

5. The mounting base is made of resin and includes a cylindrical portion which is positioned at least partially between the rod-shaped member and the hole in the substrate. The lighting fixture according to claim 2, wherein at least a portion of the rod-shaped member is housed in the hole of the cylindrical portion.

6. The aforementioned rod-shaped member is a screw including a head, The lighting fixture according to claim 4, wherein the ground wire is electrically connected to the rod-shaped member via a crimp terminal positioned between the head and the end face of the spacer.

7. The mounting base includes a cylindrical portion which is positioned at least partially between the spacer and the hole in the optical cover, The lighting fixture according to claim 6, wherein the mounting base has a rotation suppression part that prevents the crimp terminal from rotating when it is screwed in.

8. The lighting fixture according to claim 4, wherein the main body has a recess for positioning one end of the spacer.

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