Lighting device

Abstract

To provide an illumination device capable of suppressing a flexural load of an intermediate member and a top plate member at the time of connecting a connection member and suppressing assembly impossibility even when unevenness of a dimension occurs in a connection part between the intermediate member and the top plate member.SOLUTION: An illumination device includes an intermediate member 4, a top plate member 5 and a connection member 9. The intermediate member 4 has a plate-like base part 40 and a plurality of projections 41. A first through hole 42 is formed at the projection positioned in one end portion of a line among the plurality of projections 41. A second through hole 52a is formed in a position corresponding to the first through hole 42 in a top plate side portion 52 of the top plate member 5. The intermediate member 4 and the top plate member 5 are connected by fitting a first shaft part of the connection member 9 into the first through hole 42, abutting a step portion between the first shaft part and a second shaft part on an outside surface of the top plate side portion 52, and inserting the second shaft part of the connection member 9 into the second through hole 52a and fixing.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a lighting device.

Background Art

[0002] Conventionally, lighting devices that are attached to an attachment part such as a ceiling are known. For example, the lighting device disclosed in Patent Document 1 includes a radiator, a light-emitting module, and a chassis. The radiator has a main body part, a plurality of heat-radiating fin parts that protrude upward from the upper surface of the main body part, and attachment parts that are formed on both side edges of one side of the main body part and are arranged in parallel with the heat-radiating fin parts. The radiator is integrally formed by extrusion molding of a metal material such as aluminum. The light-emitting module has a substrate and a plurality of light-emitting elements mounted on the substrate. The light-emitting module is attached to the lower surface of the main body part of the radiator. The chassis is formed in a concave shape by a flat rectangular upper surface part and side surface parts that are bent downward from both side edges of one side of the upper surface part. The chassis is placed on the radiator so that the heat-radiating fins of the radiator are arranged inside the concave part, and is attached to the radiator by connecting the left and right side surface parts and the attachment parts of the radiator with screws.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the heat sink and chassis constituting the lighting device described in Patent Document 1 may experience dimensional variations during molding. If the dimensions are set so that the mounting portion of the heat sink and the side portion of the chassis come into contact without considering these variations, a gap or interference will occur between the mounting portion of the heat sink and the side portion of the chassis. In this state, if the side portion of the chassis is connected to the mounting portion of the heat sink with screws, if a gap exists, the axial force applied in the axial direction of the screws during screw fastening will act as a bending load on the heat sink and chassis, potentially damaging the heat sink and chassis. If interference occurs, assembly may become impossible.

[0005] This disclosure was made to solve the above-mentioned problems, and aims to provide a lighting device that can suppress the bending load on the intermediate member and the top plate member when connecting the connecting members, and can also suppress assembly failures, even if dimensional variations occur at the connection part between the intermediate member and the top plate member due to dimensional variations during the molding of the intermediate member and the top plate member attached to the upper part of the intermediate member. [Means for solving the problem]

[0006] The lighting device according to this disclosure comprises an intermediate member, a top plate member attached to the upper part of the intermediate member, and a connecting member connecting the intermediate member and the top plate member, wherein the intermediate member has a plate-shaped base portion and a plurality of protrusions rising upward from the base portion and arranged in parallel, the top plate member has a planar top plate main portion and a pair of top plate side portions protruding from the side edge of the top plate main portion toward the intermediate member, a first through hole is formed in the protrusion located at one end of a row of the plurality of protrusions arranged in parallel, a second through hole is formed in the top plate side portion at a position corresponding to the first through hole, the connecting member has a head portion, a first shaft portion protruding from the head portion, and a second shaft portion protruding from the first shaft portion and having a smaller diameter than the first shaft portion, the intermediate member and the top plate member are connected by the first shaft portion of the connecting member being fitted into the first through hole. With the head separated from the protrusion in which the first through hole is formedThe stepped portion between the first shaft portion and the second shaft portion abuts against the outer surface of the side of the top plate, and the second shaft portion of the connecting member is inserted into the second through hole and fixed in place, thereby connecting them.

[0007] Furthermore, the lighting device according to this disclosure comprises an intermediate member, a top plate member attached to the upper part of the intermediate member, and a connecting member connecting the intermediate member and the top plate member, wherein the intermediate member has a plate-shaped base portion and a plurality of protrusions rising upward from the base portion and arranged in parallel, the top plate member has a planar top plate main portion and a pair of top plate side portions protruding from the side edge of the top plate main portion toward the intermediate member, a first through hole is formed in the protrusion located at one end of a row of the plurality of protrusions arranged in parallel, a second through hole is formed in the top plate side portion at a position corresponding to the first through hole, the connecting member has a head portion, a first shaft portion protruding from the head portion, and a second shaft portion protruding from the first shaft portion and having a smaller diameter than the first shaft portion, the intermediate member and the top plate member are connected by the first shaft portion of the connecting member being fitted into the second through hole. With the head separated from the side of the top plate in which the second through hole is formed The stepped portion between the first shaft portion and the second shaft portion abuts against the outer surface of the protruding portion located at one end of the row, and the second shaft portion of the connecting member is inserted into the first through hole and fixed in place, thereby connecting them. [Effects of the Invention]

[0008] According to this disclosure, even if dimensional variations occur in the connection portion between the intermediate member and the top plate member due to dimensional variations during the molding of the intermediate member and the top plate member, the first shaft portion of the connecting member fitted into the first through hole absorbs these variations, and the second shaft portion of the connecting member is inserted into the second through hole and fixed in place. This suppresses the bending load on the intermediate member and the top plate member when connecting the connecting member, and also suppresses assembly failures.

[0009] Furthermore, according to this disclosure, even if dimensional variations occur in the connection portion between the intermediate member and the top plate member due to dimensional variations during the molding of the intermediate member and the top plate member, the first shaft portion of the connecting member fitted into the second through hole absorbs these variations, and the second shaft portion of the connecting member is inserted into and fixed in the first through hole. This suppresses the bending load on the intermediate member and the top plate member when connecting the connecting member, and also suppresses assembly failures. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing the lighting device according to Embodiment 1. [Figure 2] This is a perspective view showing a disassembled lighting device according to Embodiment 1. [Figure 3] This is a perspective view of the light source unit of the lighting device according to Embodiment 1, showing the state in which the power supply unit has been removed. [Figure 4] This is a front view of the light source unit of the lighting device according to Embodiment 1, showing the state in which the power supply unit has been removed. [Figure 5] This is a perspective view showing an intermediate member of the lighting device according to Embodiment 1. [Figure 6] This is a perspective view of the top plate member of the lighting device according to Embodiment 1, taken from the top side. [Figure 7] This is a perspective view of the top plate member of the lighting device according to Embodiment 1, taken from the bottom side. [Figure 8] This is an enlarged view of the main part of a lighting device according to Embodiment 1, showing the stage immediately before the intermediate member and the top plate member are connected by a connecting member. [Figure 9] This is an enlarged view of the main part of a lighting device according to Embodiment 1, showing the intermediate member and the top plate member connected by a connecting member. [Figure 10] This is a side view of the light source unit of a lighting device according to Embodiment 1, showing the state in which a holding member is attached to an intermediate member. [Figure 11] This is a side view showing a different state of the light source unit of a lighting device according to Embodiment 1, in which a holding member is attached to the intermediate member. [Figure 12] This is a perspective view showing a disassembled power supply unit of the lighting device according to Embodiment 1. [Figure 13] This is a front view of the light source unit of a lighting device according to Embodiment 2, showing the state in which the power supply unit has been removed. [Figure 14] This is an enlarged view of the main part of a lighting device according to Embodiment 2, showing the intermediate member and the top plate member joined together by a connecting member. [Modes for carrying out the invention]

[0011] Embodiments of the present disclosure will be described below with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and their descriptions are omitted or simplified as appropriate. Furthermore, the shape, size, and arrangement of the components shown in each drawing can be changed as appropriate. In the following description, the upper part of the drawings will be referred to as the "upper side" and the lower part as the "lower side". In addition, terms indicating direction (for example, "right," "left," etc.) will be used as appropriate to facilitate understanding, but these terms are for illustrative purposes only and do not limit the present disclosure.

[0012] Embodiment 1. Referring to FIGS. 1 to 12, the lighting device 100 according to Embodiment 1 will be described. FIG. 1 is a perspective view showing the lighting device 100 according to Embodiment 1. FIG. 2 is a perspective view showing the lighting device 100 according to Embodiment 1 disassembled. FIG. 3 is a perspective view showing the light source unit 2 of the lighting device 100 according to Embodiment 1 with the power supply device 7 removed. FIG. 4 is a front view showing the light source unit 2 of the lighting device 100 according to Embodiment 1 with the power supply device 7 removed. FIG. 5 is a perspective view showing the intermediate member 4 of the lighting device 100 according to Embodiment 1. FIG. 6 is a perspective view showing the top plate member 5 of the lighting device 100 according to Embodiment 1 from the upper surface side. FIG. 7 is a perspective view showing the top plate member 5 of the lighting device 100 according to Embodiment 1 from the lower surface side. FIG. 8 is an enlarged view of a main part showing a stage immediately before connecting the intermediate member 4 and the top plate member 5 with the connecting member 9 in the lighting device 100 according to Embodiment 1. FIG. 9 is an enlarged view of a main part showing a state where the intermediate member 4 and the top plate member 5 are connected with the connecting member 9 in the lighting device 100 according to Embodiment 1. FIG. 10 is a side view showing the light source unit 2 of the lighting device 100 according to Embodiment 1 with the holding member 6 attached to the intermediate member 4. FIG. 11 is a side view showing a different state of the light source unit 2 of the lighting device 100 according to Embodiment 1 with the holding member 6 attached to the intermediate member 4. FIG. 12 is a perspective view showing the power supply device 7 of the lighting device 100 according to Embodiment 1 disassembled.

[0013] In each of the above figures, the width direction of the lighting device 100 along the parallel direction of the protrusions 41 is defined as the X direction. Also, the depth direction of the lighting device 100 orthogonal to the X direction is defined as the Y direction. And the vertical direction orthogonal to both the X direction and the Y direction is defined as the Z direction. In the Z direction, the side where the lighting device 100 is attached is defined as the upward Z1. And the direction toward the irradiation space side where light is irradiated from the lighting device 100 is defined as the downward Z2.

[0014] As shown in FIGS. 1 and 2, the lighting device 100 according to Embodiment 1 includes an arm member 1 attached to an attachment portion such as a ceiling via a suspension bolt or the like, and a light source unit 2 held by the arm member 1. As shown in FIGS. 2 to 4, the light source unit 2 includes a light source member 3 that emits light, an intermediate member 4 to which the light source member 3 is attached, a top plate member 5 attached to the upper part of the intermediate member 4, a holding member 6 attached to the intermediate member 4 and rotatably holding the arm member 1, a power supply device 7 that supplies power to the light source member 3, and a cover member 8 that covers the light source member 3.

[0015] As shown in FIGS. 1 and 2, the arm member 1 is an attachment member for attaching the lighting device 100 to an attachment portion such as a ceiling. The arm member 1 has a U-shaped configuration including a flat plate-shaped arm main portion 10 and a pair of arm side portions 11 formed by being bent from both ends of the arm main portion 10 toward the light source unit 2. The arm main portion 10 is a portion attached to the attachment portion via a suspension bolt or the like. Two suspension bolt holes 10a and 10b for attaching a suspension bolt are formed in the arm main portion 10. One of the suspension bolt holes 10a is oval-shaped. The other suspension bolt hole 10b has a daruma shape for absorbing tolerances. Further, a through hole 10c into which a mounting bracket for attachment to, for example, an H-shaped steel is inserted is formed in a curved portion connecting the arm main portion 10 and the arm side portion 11.

[0016] The arm side portion 11 is a portion connected to the light source unit 2. The leading edge of the arm side portion 11 is arc-shaped, and a portion surrounded by the arc shape is an arm connection portion 11a. A shaft hole 11b through which the shaft portion of the bolt 12 passes is formed in the arm connection portion 11a. Both ends of the arm member 1 are attached to the holding member 6 by the bolt 12 passed through the shaft hole 11b, and are rotatably attached to the intermediate member 4 via the holding member 6.

[0017] As shown in Figure 2, the light source member 3 includes a substrate 30 on which multiple light-emitting elements (not shown) are mounted, and a lens 31 that is attached to cover the multiple light-emitting elements and controls the light distribution from the light-emitting elements. The light source member 3 is attached to the lower surface of the intermediate member 4 with fasteners 32, such as screws, and receives power from the power supply unit 7 to make the light-emitting elements emit light.

[0018] The intermediate member 4 is, for example, a heat sink that dissipates heat generated by the light source member 3. The intermediate member 4 is made of a material with good heat dissipation properties, such as aluminum, and is formed into a roughly rectangular parallelepiped shape by extrusion molding. As shown in Figures 1 to 5, the intermediate member 4 has a plate-shaped base portion 40 on its lower surface, which is the irradiation surface side, to which the light source member 3 is attached, and a plurality of plate-shaped protrusions 41 that rise upward from the upper surface of the base portion 40. The base portion 40 has the effect of dissipating heat generated by the light source member 3. The plate-shaped protrusions 41 are heat dissipation fins. The thickness of the base portion 40 is such that the central portion 40a of the upper surface on which the protrusions 41 are formed is convex upward. The central portion 40a of this plate thickness is hollow inside, and a power supply member (not shown) that connects the light source member 3 and the power supply device 7 is provided therein. In addition, the base portion 40 has a plurality of screw holes 40b for fasteners 81 such as screws used to attach the cover member 8.

[0019] The protruding portion 41 is integrally connected at its lower end to the base portion 40 and is formed to rise upward from the upper surface of the base portion 40. Multiple protruding portions 41 are provided in parallel at regular intervals so that their plate surfaces are nearly parallel. The intermediate member 4 dissipates heat generated by the light source member 3 by allowing air to flow between the multiple protruding portions 41.

[0020] The multiple parallel protrusions 41 have first protrusions 41a and 41b located at both ends of the row, and a second protrusion 41c located between the first protrusions 41a and 41b. The first protrusions 41a and 41b are formed to be thicker than the second protrusion 41c. The upper portion of the first protrusions 41a and 41b is thinner than the lower portion, and the upper portion serves as a mounting surface for attaching the top plate member 5. On the mounting surface of one of the first protrusions 41a, multiple first through holes 42 for attaching the top plate member 5 with a connecting member 9 are formed at intervals along the direction in which the protrusion 41 extends (Y direction). On the mounting surface of the other first protrusion 41b, multiple through holes 43 for attaching the top plate member 5 with fasteners 9a such as screws are formed at intervals along the direction in which the protrusion 41 extends (Y direction). Furthermore, multiple screw holes 44 for attaching the retaining member 6 are formed in the first protrusions 41a and 41b. Note that the first through holes 42, through holes 43 and screw holes 44 are not limited to the positions and number shown in the figure, but may be provided in any way that is appropriate.

[0021] The intermediate member 4 is preferably a heat sink as shown in the figure, but is not limited to a heat sink; for example, it may be configured as a member that does not have heat dissipation properties. In this case, the intermediate member 4 is not limited to a configuration in which the light source member 3 is attached to the lower surface of the base portion 40; it may also be configured in which a sensor device such as an illuminance sensor or a motion sensor, or a communication device is attached to the lower surface of the base portion 40, or it may be configured in which no components are attached to the lower surface of the base portion 40. Furthermore, the intermediate member 4 is not limited to being formed by extrusion molding; it may be formed by other molding methods.

[0022] As shown in Figures 1 and 2, the top plate member 5 is designed to support and secure a power supply unit 7 on its upper surface, as an example. The top plate member 5 is located on the upper surface of the protrusions 41, and two of them are arranged spaced apart in the direction in which each protrusion 41 extends (Y direction). The top plate member 5 is formed by bending a metal plate. As shown in Figures 2, 3, 6, and 7, the top plate member 5 has a main top plate portion 50 that is long along the parallel direction (X direction) of the protrusions 41, a top plate convex portion 51 that rises upward from the outer edge along the longitudinal direction of the main top plate portion 50, and top plate side portions 52 that protrude toward the intermediate member 4 from both ends of the main top plate portion 50 in the longitudinal direction (X direction). The power supply unit 7 is supported and secured on the top plate main portion 50. The main top plate portion 50 has multiple through holes 50a through which the shafts of fasteners 53 such as screws for securing the power supply unit 7 pass.

[0023] The top plate protrusion 51 is formed to increase the rigidity of the top plate member 5. The top plate protrusion 51 may be formed continuously along the outer edge of the main top plate portion 50 in the longitudinal direction, or it may be formed partially along the outer edge. In addition, a horizontally elongated discharge hole 51a is formed at the lower part of the top plate protrusion 51. The discharge hole 51a is provided to discharge water, dust, etc. that tend to accumulate on the upper surface of the main top plate portion 50.

[0024] The top plate side portions 52 are formed by bending from both ends of the main top plate portion 50 in the longitudinal direction (X direction) toward the intermediate member 4. As shown in Figure 4, the length L1 between the pair of top plate side portions 52 is shorter than the length L2 between the first protrusions 41a and 41b. The top plate side portions 52 are the parts that connect to the first protrusions 41a and 41b of the intermediate member 4. As shown in Figures 6 and 7, a second through hole 52a is formed in one of the top plate side portions 52 at a position corresponding to the first through hole 42. Also, a through hole 52b is formed in the other top plate side portion 52 at a position corresponding to the through hole 43. The second through hole 52a and the through hole 52b are screw holes. As shown in Figures 3 and 4, one side of the top plate 52 is positioned between the first protrusion 41a and the second protrusion 41c, and is connected to the first protrusion 41a by a connecting member 9, with a gap S1 between the side of the top plate 52 and the first protrusion 41a. The other side of the top plate 52 is positioned between the first protrusion 41b and the second protrusion 41c, and is connected to the first protrusion 41b by a fastener 9a, with a gap S2 between the side of the top plate 52 and the first protrusion 41b.

[0025] Note that the top plate member 5 is not limited to the configuration of two members spaced apart, as shown in the figure. Although not shown in the figure, the top plate member 5 may be made as a single piece that covers the tops of the multiple protrusions 41. By making the top plate member 5 as two pieces, as shown in the figure, the amount of material used is reduced, thus reducing material costs. On the other hand, if the dimensions of the intermediate member 4 are small, making the top plate member 5 as a single piece reduces the effort required for processing and thus reduces manufacturing costs.

[0026] The connecting member 9 connects one first protrusion 41a of the intermediate member 4 to one top plate side portion 52 of the top plate member 5. The connecting member 9 has a head portion 90, a first shaft portion 91 protruding from the head portion 90, and a second shaft portion 92 protruding from the first shaft portion 91 and having a smaller diameter than the first shaft portion 91. The first shaft portion 91 is longer than the gap S1 provided between the top plate side portion 52 and the first protrusion 41a. This takes into account the dimensional variations that occur during the molding of the intermediate member 4 and the top plate member 5. The dimensions of the first shaft portion 91 are determined by considering the dimensional tolerances between the first protrusions 41a and 41b at both ends, as well as the dimensional tolerances of other surrounding parts. Only the second shaft portion 92 of the connecting member 9 is a screw shaft portion.

[0027] As shown in Figures 8 and 9, the first protrusion 41a and the side of the top plate 52 are connected by the first shaft portion 91 of the connecting member 9 being fitted into the first through hole 42, the stepped portion between the first shaft portion 91 and the second shaft portion 92 abutting against the outer surface of the side of the top plate 52, and the second shaft portion 92 of the connecting member 9 being inserted into the second through hole 52a and screwed together. The first protrusion 41a is fixed by the first shaft portion 91 of the connecting member 9 being fitted into the first through hole 42. The side of the top plate 52 is fixed by being screwed to the second shaft portion 92 of the connecting member 9.

[0028] Furthermore, the other first protrusion 41b and the other top plate side portion 52 are connected by fasteners 9a that are screwed into the through holes 43 and 52b, respectively, as shown in Figures 3 and 4. In this way, the intermediate member 4 and the top plate member 5 are connected by the connecting member 9 and the fasteners 9a.

[0029] The connecting member 9 may be a known stepped screw member, or a regular screw member without steps may be fitted with a cylindrical spacer or the like to have the same configuration as a stepped screw member. Alternatively, the connecting member 9 may be a stepped pin without a screw shaft, and the second shaft portion 92 inserted into the second through hole 52a may be fixed by fitting, welding, or adhesive, for example.

[0030] As shown in Figures 1 and 2, the retaining member 6 is provided to rotatably attach the arm member 1 to the intermediate member 4. The retaining member 6 is made of iron or stainless steel, etc. As an example, the retaining member 6 has a flat plate portion 60, a pair of side portions 61, a pair of upper mounting portions 62, and a lower mounting portion 63.

[0031] The flat plate portion 60 is, for example, rectangular in shape, and is the part to which the arm member 1 is attached. The flat plate portion 60 has a through hole 60a through which the shaft portion of the bolt 12 passes. In addition, a connecting hole 60b for tightening the bolt 12 is provided on the inner surface of the flat plate portion 60. The connecting hole 60b is, for example, a through hole 60a that has been tapped with a screw. The arm member 1 is attached at both ends to the holding member 6 by screwing the shaft portion of the bolt 12, which has been passed through the shaft hole 11b, through the through hole 60a into the connecting hole 60b, and the arm member 1 is rotatably attached to the intermediate member 4 via the holding member 6.

[0032] The pair of side portions 61 are formed to protrude from both the left and right side edges of the flat plate portion 60 toward the first projection 41a of the intermediate member 4. The side portions 61 have a reinforcing effect against twisting of the flat plate portion 60.

[0033] The upper mounting portion 62 is formed by bending outward from the edge of the side portion 61 along the outer surface of the first projection 41b. The pair of upper mounting portions 62 protrude away from each other in a direction away from the flat plate portion 60. Three through holes 62a are formed in the pair of upper mounting portions 62 in the vertical direction. The retaining member 6 is connected to the first projection 41a or 41b by bringing one surface of the upper mounting portion 62 into contact with the outer surface of the first projection 41a or 41b, passing the shaft of the screw member 64 through the through hole 62a, and screwing the shaft into the screw hole 44.

[0034] As shown in Figures 2, 10, and 11, of the three through holes (62a to 62c) formed in the vertical direction, only a selected portion of the through holes (62a to 62c) are used. For example, as in the lighting device 100 shown in Figure 10, if the upper ends of the first protrusions 41a and 41b of the intermediate member 4 are above the upper through hole 62a of the retaining member 6, the retaining member 6 is attached to the first protrusions 41a and 41b of the intermediate member 4 by inserting the screw members 64 through the upper through hole 62a and the lower through hole 62c, respectively. Also, as in the lighting device 100 shown in Figure 11, if the upper ends of the first protrusions 41a and 41b of the intermediate member 4 are below the upper through hole 62a of the retaining member 6, the retaining member 6 is attached to the first protrusions 41a and 41b of the intermediate member 4 by inserting the screw members 64 through the central through hole 62b and the lower through hole 62c, respectively. The retaining member 6 can be attached to the first protrusions 41a and 41b of the intermediate member 4, which have different heights, by having three through holes (62a to 62c) in the vertical direction. Therefore, it can be used interchangeably even if the heights of the first protrusions 41a and 41b change. Note that the heights of the first protrusions 41a and 41b change because the amount of heat generated differs depending on the output of the light-emitting element, and each light-emitting element requires a heat dissipation surface corresponding to the amount of heat generated.

[0035] The lower mounting portion 63 is formed by bending from the lower end of the flat plate portion 60 toward the cover member 8. The lower mounting portion 63 is provided to hold the cover member 8 by abutting its lower surface against the flange portion 80 of the cover member 8 and sandwiching the flange portion 80 together with the base portion 40 of the intermediate member 4. The lower mounting portion 63 is divided into two by a notch formed in the middle. The shaft portion of a fastener 81 such as a screw, used to attach the cover member 8 to the intermediate member 4, is inserted into the notch in the middle of the lower mounting portion 63. Note that the lower mounting portion 63 does not necessarily need to be divided into two; a through hole may be provided instead of a notch.

[0036] The holding member 6 is not limited to the above-described form; it may take any other form as long as it can rotatably attach the arm member 1 to the intermediate member 4.

[0037] The power supply unit 7 supplies power to the light source member 3. As shown in Figures 1, 2, and 12, the power supply unit 7 includes a cylindrical, rectangular power supply case 70, a lighting control circuit 71 provided inside the power supply case 70, end plates 72 that close the openings at both ends of the power supply case 70, a connector 73 provided on the outer surface of the end plates 72, and a connector cover 74 that protects the connector 73.

[0038] The lighting control circuit 71 is a circuit board on which multiple electronic components are mounted. The lighting control circuit 71 has the function of converting external power to light up the light-emitting elements and receiving signals from an external source to control the lighting state of the light-emitting elements.

[0039] The end plate 72 is made of sheet metal, for example, and is attached to the opening surface of the power supply case 70 with a packing in between. A leg portion 72a is formed at the lower end of the end plate 72 for attachment to the main top plate portion 50 of the top plate member 5. A through hole 72b is formed in the leg portion 72a for passing fasteners 53 such as screws. The power supply unit 7 is placed on the main top plate portion 50 and attached to the top plate member 5 by screwing the shaft portion of the fastener 53 into the through hole 50a of the main top plate portion 50 and the through hole 72b of the leg portion 72a.

[0040] The connector 73 is provided on the outer surface of the end plate 72 and supplies power to the lighting control circuit 71 via a power line from the outside. The connector 73 has an opening for inserting the power line from the outside. The connector 73 is connected to the lighting control circuit 71 by internal wires. The connector cover 74 is attached to the end plate 72 so as to cover the connector 73.

[0041] The cover member 8 is box-shaped and has an opening on the side facing the light source member 3. The cover member 8 is provided to cover and protect the light source member 3 which is attached to the base portion 40 of the intermediate member 4. The cover member 8 also diffuses and transmits light from the light-emitting element. The cover member 8 is made of a transparent material such as glass or synthetic resin. The cover member 8 is provided with a flange portion 80 that protrudes outward along the edge of the opening. Multiple through holes 80a are formed in the flange portion 80 for passing the shaft portion of a fastener 81 such as a screw. The cover member 8 is attached to the intermediate member 4 by bringing the upper surface of the flange portion 80 into contact with the base portion 40 of the intermediate member 4 and screwing the shaft portion of the fastener 81, which has been passed through the through holes 80a, into the screw holes 40b of the base portion 40.

[0042] Incidentally, the intermediate member 4 and the top plate member 5 may have dimensional variations during molding. If the dimensions are set so that the first protrusions 41a and 41b of the intermediate member 4 and the top plate side portion 52 of the top plate member 5 come into contact without considering these variations, a gap or interference will occur between the first protrusions 41a and 41b and the top plate side portion 52. In this state, if the first protrusions 41a and 41b are connected to the top plate side portion 52 with screws, if a gap exists, the axial force applied in the axial direction of the screw during screw fastening will act as a bending load on the intermediate member 4 or the top plate member 5, potentially damaging the intermediate member 4 or the top plate member 5. If interference occurs, assembly may become impossible.

[0043] Therefore, the lighting device 100 according to this embodiment 1 comprises an intermediate member 4, a top plate member 5 attached to the upper part of the intermediate member 4, and a connecting member 9 connecting the intermediate member 4 and the top plate member 5. The intermediate member 4 has a plate-shaped base portion 40 and a plurality of protrusions 41 that rise upward from the base portion 40 and are arranged in parallel. The top plate member 5 has a planar top plate main portion 50 and top plate side portions 52 that protrude from the side edge of the top plate main portion 50 toward the intermediate member 4. A first through hole 42 is formed in the first protrusion 41a located at one end of the row of the plurality of protrusions 41 arranged in parallel. A second through hole 52a is formed in the top plate side portion 52 at a position corresponding to the first through hole 42. The connecting member 9 has a head portion 90, a large-diameter first shaft portion 91 protruding from the head portion 90, and a small-diameter second shaft portion 92 protruding from the first shaft portion 91. The intermediate member 4 and the top plate member 5 are connected when the first shaft portion 91 of the connecting member 9 is fitted into the first through hole 42, the stepped portion between the first shaft portion 91 and the second shaft portion 92 abuts against the outer surface of the top plate side portion 52, and the second shaft portion 92 of the connecting member 9 is inserted into the second through hole 52a and fixed in place.

[0044] Therefore, in the lighting device 100 according to this embodiment 1, even if dimensional variations occur in the connection portion between the intermediate member 4 and the top plate member 5 due to dimensional variations during the molding of the intermediate member 4 and the top plate member 5, the first shaft portion 91 of the connecting member 9 fitted into the first through hole 42 absorbs these variations, and the second shaft portion 92 of the connecting member 9 is inserted into the second through hole 52a and fixed in place. This suppresses the bending load on the intermediate member 4 and the top plate member 5 when connecting the connecting member 9, and also suppresses assembly failures.

[0045] Furthermore, the multiple parallel protrusions 41 have first protrusions 41a and 41b located at both ends of the row, and a second protrusion 41c located between the first protrusions 41a and 41b. The first protrusions 41a and 41b are formed with a greater plate thickness than the second protrusion 41c. In other words, by forming the first protrusions 41a and 41b with a greater plate thickness, their strength can be increased, and they become less prone to deformation even when the first through holes 42 and 43 are formed. Therefore, the lighting device 100 according to this embodiment 1 can have improved durability.

[0046] Embodiment 2. Next, the lighting device 100 according to this second embodiment will be described with reference to Figures 13 and 14. Figure 13 is a front view of the light source unit 2 of the lighting device 100 according to the second embodiment, showing the state in which the power supply unit 7 has been removed. Figure 14 is an enlarged view of the main part of the lighting device 100 according to the second embodiment, showing the state in which the intermediate member 4 and the top plate member 5 are connected by the connecting member 9. Note that components identical to those of the lighting device 100 described in the first embodiment are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0047] As shown in Figure 13, the lighting device 100 according to this second embodiment has a configuration in which the length L1 between the pair of top plate side portions 52 is longer than the length L2 between the first protrusions 41a at both ends. The other configurations are the same as those of the lighting device 100 described in the first embodiment.

[0048] In the lighting device 100 according to Embodiment 2, one first protrusion 41a and one top plate side portion 52 are connected by fitting the first shaft portion 91 of the connecting member 9 into the second through hole 52a, the stepped portion between the first shaft portion 91 and the second shaft portion 92 abutting against the outer surface of the first protrusion 41a, and inserting the second shaft portion 92 of the connecting member 9 into the first through hole 42 and screwing it in. The top plate side portion 52 is fixed by fitting the first shaft portion 91 of the connecting member 9 into the second through hole 52a. The first protrusion 41a is fixed by screwing it into the second shaft portion 92 of the connecting member 9.

[0049] Furthermore, the other first protrusion 41b and the other top plate side portion 52 are connected by a fastener 9a that is screwed into the through hole 43 and the through hole 52b, as shown in Figure 13. In this way, the intermediate member 4 and the top plate member 5 are connected by the connecting member 9 and the fastener 9a.

[0050] The connecting member 9 may be a known stepped screw member, or a regular screw member without steps may be fitted with a cylindrical spacer or the like to have the same configuration as a stepped screw member. Alternatively, the connecting member 9 may be a stepped pin without a screw shaft, and the second shaft portion 92 inserted into the first through hole 42 may be fixed by fitting, welding, or adhesive, for example.

[0051] Therefore, in the lighting device 100 according to this second embodiment, even if dimensional variations occur in the connection portion between the intermediate member 4 and the top plate member 5 due to dimensional variations during the molding of the intermediate member 4 and the top plate member 5, the first shaft portion 91 of the connecting member 9 fitted into the second through hole 52a absorbs these variations, and the second shaft portion 92 of the connecting member 9 is inserted into the first through hole 42 and fixed in place. This suppresses the bending load on the intermediate member 4 and the top plate member 5 when connecting the connecting member 9, and also suppresses assembly failures.

[0052] Although the lighting device 100 has been described above based on the embodiments, the lighting device 100 is not limited to the configuration of the embodiments described above. The configuration of the lighting device 100 described above is just one example, and it may include other components or omit some components. In short, the lighting device 100 includes the range of design changes and application variations that a person skilled in the art would normally make, as long as they do not depart from its technical concept.

[0053] The various aspects of this disclosure are summarized below as an appendix.

[0054] (Note 1) Intermediate member and A top plate member attached to the upper part of the intermediate member, The system includes a connecting member that connects the intermediate member and the top plate member, The aforementioned intermediate member is A plate-shaped base part, It has a plurality of protrusions that rise upward from the base portion and are arranged in parallel, The aforementioned top plate member comprises a flat top plate main part, It has a pair of top plate sides that protrude from the side edge of the main top plate toward the intermediate member, Of the multiple protrusions arranged in parallel, the protrusion located at one end of the row has a first through-hole formed in it. The side portion of the top plate has a second through hole formed at a position corresponding to the first through hole. The connecting member has a head, a first shaft portion protruding from the head, and a second shaft portion protruding from the first shaft portion and having a smaller diameter than the first shaft portion. A lighting device in which the intermediate member and the top plate member are connected by the first shaft portion of the connecting member being fitted into the first through hole, the stepped portion between the first shaft portion and the second shaft portion abutting against the outer surface of the side of the top plate, and the second shaft portion of the connecting member being inserted into the second through hole and fixed in place.

[0055] (Note 2) Intermediate member and A top plate member attached to the upper part of the intermediate member, The system includes a connecting member that connects the intermediate member and the top plate member, The aforementioned intermediate member is A plate-shaped base part, It has a plurality of protrusions that rise upward from the base portion and are arranged in parallel, The aforementioned top plate member comprises a flat top plate main part, It has a pair of top plate sides that protrude from the side edge of the main top plate toward the intermediate member, Of the multiple protrusions arranged in parallel, the protrusion located at one end of the row has a first through-hole formed in it. The side portion of the top plate has a second through hole formed at a position corresponding to the first through hole. The connecting member has a head, a first shaft portion protruding from the head, and a second shaft portion protruding from the first shaft portion and having a smaller diameter than the first shaft portion. A lighting device in which the intermediate member and the top plate member are connected by the first shaft portion of the connecting member being fitted into the second through hole, the stepped portion between the first shaft portion and the second shaft portion abutting against the outer surface of the protruding portion located at one end of the row, and the second shaft portion of the connecting member being inserted into the first through hole and fixed in place.

[0056] (Note 3) The parallel arrangement of the multiple protrusions includes a first protrusion positioned at both ends of the row and a second protrusion positioned between the first protrusions. The lighting device according to Appendix 1 or 2, wherein the first projection is formed to be thicker than the second projection.

[0057] (Note 4) The lighting device described in any one of the appendices 1 to 3, wherein the intermediate member is a heat sink. [Explanation of Symbols]

[0058] 1 Arm member, 2 Light source unit, 3 Light source member, 4 Intermediate member, 5 Top plate member, 6 Holding member, 7 Power supply unit, 8 Cover member, 9 Connecting member, 9a Fastener, 10 Main arm part, 10a, 10b Hole for suspension bolt, 10c Through hole, 11 Side arm part, 11a Arm connection part, 11b Axle hole, 12 Bolt, 30 Base plate, 31 Lens, 32 Fastener, 40 Base part, 40a Center part, 40b Screw hole, 41 Protrusion, 41a, 41b First protrusion, 41c Second protrusion, 42 First through hole, 43 Through hole, 44 Screw hole, 50 Main top plate part, 50a Through hole, 51 Top plate protrusion, 51a Discharge hole, 52 Side top plate part, 52a Second through hole, 52b Through hole, 53 Fastener, 60 Flat plate section, 60a Through hole, 60b Connection hole, 61 Side section, 62 Upper mounting section, 62a, 62b, 62c Through hole, 63 Lower mounting section, 64 Screw member, 70 Power supply case, 71 Lighting control circuit, 72 End plate, 72a Leg section, 72b Through hole, 73 Connector, 74 Connector cover, 80 Flange section, 80a Through hole, 81 Fastener, 90 Head, 91 First shaft section, 92 Second shaft section, 100 Lighting device.

Claims

1. Intermediate member and A top plate member attached to the upper part of the intermediate member, The system includes a connecting member that connects the intermediate member and the top plate member, The aforementioned intermediate member is A plate-shaped base part, It has a plurality of protrusions that rise upward from the base portion and are arranged in parallel, The aforementioned top plate member comprises a flat top plate main part, It has a pair of top plate sides that protrude from the side edge of the main top plate toward the intermediate member, Of the multiple protrusions arranged in parallel, the protrusion located at one end of the row has a first through-hole formed in it. The side portion of the top plate has a second through hole formed at a position corresponding to the first through hole. The connecting member has a head, a first shaft portion protruding from the head, and a second shaft portion protruding from the first shaft portion and having a smaller diameter than the first shaft portion. A lighting device in which the intermediate member and the top plate member are connected by the first shaft portion of the connecting member being fitted into the first through hole, the stepped portion between the first shaft portion and the second shaft portion abutting against the outer surface of the side of the top plate with the head portion separated from the protruding portion in which the first through hole is formed, and the second shaft portion of the connecting member being inserted into the second through hole and fixed in place.

2. Intermediate member and A top plate member attached to the upper part of the intermediate member, The system includes a connecting member that connects the intermediate member and the top plate member, The aforementioned intermediate member is A plate-shaped base part, It has a plurality of protrusions that rise upward from the base portion and are arranged in parallel, The aforementioned top plate member comprises a flat top plate main part, It has a pair of top plate sides that protrude from the side edge of the main top plate toward the intermediate member, Of the multiple protrusions arranged in parallel, the protrusion located at one end of the row has a first through-hole formed in it. The side portion of the top plate has a second through hole formed at a position corresponding to the first through hole. The connecting member has a head, a first shaft portion protruding from the head, and a second shaft portion protruding from the first shaft portion and having a smaller diameter than the first shaft portion. The intermediate member and the top plate member are connected by the first shaft portion of the connecting member being fitted into the second through hole, the head portion being separated from the side portion of the top plate where the second through hole is formed, the stepped portion between the first shaft portion and the second shaft portion abutting against the outer surface of the protruding portion located at one end of the row, and the second shaft portion of the connecting member being inserted into the first through hole and fixed in place.

3. The parallel arrangement of the aforementioned protrusions includes a first protrusion positioned at both ends of the row and a second protrusion positioned between the first protrusions. The lighting device according to claim 1 or 2, wherein the first protrusion is formed to be thicker than the second protrusion.

4. The lighting device according to claim 1 or 2, wherein the intermediate member is a heat sink.

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