Lighting device

Abstract

To provide a lighting device which enables a worker to perform attachment work of a light source unit to a base member easily.SOLUTION: A lighting device includes a base member and a light source unit. The light source unit is attached to the base member. The light source unit includes a light source installation part 120, an attachment member 130, and a power source part 150. A light source is installed at the light source installation part 120. The attachment member 130 is installed at the light source installation part 120 and attaches the light source unit to the base member. The power source part 150 is disposed at a position, spaced away from a center line A of the light source installation part 120, of the light source installation part 120 and supplies electric power to the light source. The attachment member 130 is disposed at a position, spaced away from the center line A and located between the center line A and the power source part 150, of the light source installation part 120.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a lighting fixture. [Background technology]

[0002] The lighting fixture described in Patent Document 1 includes a light source unit and a fixture body that supports the light source unit. The fixture body is attached to a ceiling frame by a hanging bolt. The light source unit includes an LED module, a mounting member, a cover, and a fixture. The cover is supported by the mounting member so as to cover the LED module. The fixture is rotatably attached to the mounting member. The fixture is hooked onto the fixture body, thereby attaching the light source unit to the fixture body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-147666 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the light source unit described in Patent Document 1, the mounting member is disposed on a center line passing through the center of the mounting member. Also, when the fixture body is attached to the ceiling frame by the hanging bolt, in order to attach the fixture body in a well-balanced manner, the hanging bolt is usually screwed into a location located on the center line passing through the center of the fixture body. In this case, the hanging bolt protrudes from the fixture body toward the center line of the mounting member. As a result, when the light source unit is attached to the fixture body, the mounting fixture is rotated on the center line of the mounting member, so there is a risk that the hanging bolt will interfere with the rotation of the mounting fixture. As a result, the worker must change the position of the hanging bolt from the current position, which may make the installation work of the light source unit to the fixture body complicated.

[0005] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a lighting fixture that allows a worker to easily perform the work of attaching a light source unit to a base member. [Means for solving the problem]

[0006] The lighting device disclosed in the present application comprises a base member and a light source unit. The light source unit is attached to the base member. The light source unit comprises a light source installation section, an attachment member, and a power supply section. A light source is installed in the light source installation section. The attachment member is installed on the light source installation section and attaches the light source unit to the base member. The power supply section is disposed in a location of the light source installation section that is spaced apart from a center line of the light source installation section and supplies power to the light source. The attachment member is disposed in a location of the light source installation section that is spaced apart from the center line and is located between the center line and the power supply section.

[0007] In the lighting device disclosed in the present application, it is preferable that the mounting member is supported rotatably with respect to the light source installation part, and the power supply part is disposed at a position separated from a rotation locus of the mounting member.

[0008] In the lighting fixture disclosed in the present application, it is preferable that the mounting member faces the light source installation portion without protruding from the light source installation portion in a radial direction perpendicular to the optical axis. Effect of the Invention

[0009] According to the present invention, the lighting fixture can be made smaller. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of a lighting fixture according to an embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view of the lighting fixture according to the embodiment taken along line II-II in FIG. 1. [Diagram 3] FIG. 2 is a perspective view of a light source unit according to the embodiment. [Figure 4]13 is a perspective view showing a mounting member that engages with the engaging member. FIG. [Diagram 5] 11 is a cross-sectional view showing the first stage of a method for attaching the light source unit to the base member. FIG. [Figure 6] 11 is a cross-sectional view showing a second stage of the method of attaching the light source unit to the base member. FIG. [Figure 7] FIG. 4 is a plan view showing an example of an installation location of the mounting member. [Figure 8] FIG. 13 is a perspective view of a lighting fixture according to a modified example of the embodiment of the present invention. [Figure 9] 8 is a cross-sectional view of the lighting fixture taken along line VIII-VIII in FIG. 7. [Figure 10] 9 is a cross-sectional view showing a lighting fixture according to a further modified example of the lighting fixture shown in FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A lighting fixture 1 according to a first embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference symbols, and description will not be repeated. In this specification, in order to facilitate understanding of the invention, the description may be made with reference to the mutually orthogonal X, Y, and Z directions. For example, the X and Y directions are parallel to the horizontal direction, and the Z direction is parallel to the vertical direction. However, the X and Y directions may be parallel to a direction other than the horizontal direction, and the Z direction may be parallel to a direction other than the vertical direction.

[0012] First, the lighting fixture 1 will be described with reference to Fig. 1. Fig. 1 is a perspective view of the lighting fixture 1 according to the embodiment. Fig. 1 shows the lighting fixture 1 as viewed obliquely from below. The lighting fixture 1 is, for example, a recessed base light or a ceiling-mounted base light. In this embodiment, the lighting fixture 1 will be described as a recessed light. When the lighting fixture 1 is a recessed light, the lighting fixture 1 is inserted and fixed in a recessed hole formed in a top wall such as a ceiling.

[0013] 1, the lighting device 1 includes a light source unit 100 and a base member 200. The light source unit 100 is attached to the base member 200. In this embodiment, each of the light source unit 100 and the base member 200 has a substantially rectangular shape in a plan view.

[0014] The light source unit 100 includes a light source module 110. The light source module 110 includes a light source 111 and a substrate 112. The light source 111 includes a light emitting element and emits light. The light emitting element is, for example, a light emitting diode (LED). The light source 111 may include one or more light emitting elements. Alternatively, the light emitting element of the light source 111 may include an organic EL (Electro-Luminescence) element or a laser diode. The light source 111 is attached to a mounting surface of the substrate 112. In this embodiment, the substrate 112 has a substantially rectangular shape. When the light source 111 includes a plurality of light emitting elements, for example, the plurality of light emitting elements are attached to the mounting surface of the substrate 112 in a lattice pattern.

[0015] The light source module 110 may have a COB (Chip on Board) structure in which a plurality of light emitting elements of the light source 111 are mounted on a mounting surface of the substrate 112 and sealed with phosphor. Alternatively, the light source module 110 may have an SMD (Surface Mount Device) structure in which a unit in which the light source 111 and the phosphor are integrated is mounted on the mounting surface of the substrate 112 and electrically connected to a conductor of the substrate 112.

[0016] Light emitted by the light source 111 travels toward an optical axis LA. In this embodiment, the optical axis LA of the light source 111 is parallel to the Z direction and passes through the center of the light source module 110. The substrate 112 extends along a radial direction RD that is perpendicular to the optical axis LA. In other words, the direction along the substrate 112 is approximately parallel to the radial direction RD.

[0017] Next, the lighting fixture 1 will be described in detail with reference to Fig. 2. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. As shown in Fig. 2, the light source unit 100 includes a light source installation section 120, an attachment member 130, a shade 140, a power supply section 150, and a mounting member 160.

[0018] The light source module 110 is installed in the light source installation section 120. That is, the light source 111 is installed in the light source installation section 120. In this embodiment, the light source installation section 120 has a plate shape. The material of the light source installation section 120 is, for example, a conductor, and dissipates heat from the light source module 110. Note that the material of the light source installation section 120 may be an insulator.

[0019] The attachment member 130 is disposed on the side of the light source installation section 120 opposite to the side on which the light source 111 is installed. Specifically, the attachment member 130 is attached to the light source installation section 120 by the mounting member 160 on the side of the light source installation section 120 opposite to the side on which the light source 111 is installed. The attachment member 130 is, for example, a spring. The attachment member 130 attaches the light source unit 100 to the base member 200.

[0020] The base end 131 and the tip end 132 of the mounting member 130 face the light source installation section 120. More specifically, the entire mounting member 130 faces the light source installation section 120. That is, the mounting member 130 does not protrude from the light source installation section 120 in the direction along the radial direction RD. Therefore, the light source unit 100 can be made smaller than when at least one of the base end 131 and the tip end 132 of the mounting member 130 does not face the light source installation section 120, that is, when the mounting member 130 protrudes from the light source installation section 120 in the direction along the radial direction RD. As a result, the packaging box (e.g., a cardboard box) that contains the light source unit 100 during transportation or storage can be made smaller. Furthermore, the cost required for transporting the light source unit 100 can be reduced by increasing the number of light source units 100 that can be loaded per transport vehicle such as a truck. In addition, the cost required for packaging the light source unit 100 can be reduced. Specifically, if the mounting member 130 protrudes from the light source installation section 120, for example, in order to reduce the size of the packaging material for the light source unit 100, it is necessary to deform the mounting member 130 to a position where it does not protrude from the light source installation section 120 and fix the mounting member 130 with a fixing device such as a string. On the other hand, in this embodiment, since a fixing device for fixing the deformed mounting member 130 is not required, the number of parts and the labor hours for packaging the light source unit 100 can be reduced. Also, in this embodiment, it is not necessary to fix the mounting member 130 with a fixing device during transportation of the light source unit 100, so there is no need to deform the mounting member 130 for a long period of time, and the biasing force of the mounting member 130 can be prevented from decreasing.

[0021] In this embodiment, the light source unit 100 includes a pair of mounting members 130 (hereinafter, the first mounting member 130a and the second mounting member 130b may be distinguished from each other in the description). The first mounting member 130a and the second mounting member 130b face different directions at different positions. In this embodiment, the first mounting member 130a and the second mounting member 130b face each other. Specifically, the first mounting member 130a and the second mounting member 130b face each other at their tip portions 132. The first mounting member 130a is disposed on one side of the light source installation section 120, and the second mounting member 130b is disposed on the other side of the light source installation section 120. The light source unit 100 may include one mounting member 130.

[0022] Moreover, when the light source unit 100 is attached to the base member 200, the mounting member 130 is housed in the base member 200. This allows the lighting fixture 1 to be made smaller. As a result, the mounting space at the mounting location of the lighting fixture 1 may be small, and the lighting fixture 1 can be easily inserted into the recessed hole Th because the possibility of the lighting fixture 1 contacting the edge of the recessed hole Th is reduced. Note that if the mounting member 130 protrudes from the light source installation section 120, the possibility of the mounting member 130 contacting the edge of the recessed hole Th increases.

[0023] The power supply unit 150 is disposed on the side of the light source installation unit 120 opposite to the side on which the light source 111 is installed. That is, the power supply unit 150 is disposed on the same side of the light source installation unit 120 as the mounting member 130. The power supply unit 150 supplies power to the light source 111. As a result, the light source 111 emits light by the power supplied from the power supply unit 150. The power supply unit 150 includes a power supply circuit unit. The power supply circuit unit includes, for example, a power supply circuit and a lighting circuit. The power supply circuit converts an AC power supply voltage from a commercial power supply into a DC power supply voltage, and supplies the DC power supply voltage to the lighting circuit. Then, the lighting circuit supplies the DC power supply voltage to the light source 111. The power supply circuit unit may include a controller such as a microcomputer. The microcomputer controls, for example, the lighting circuit.

[0024] The shade 140 is attached to the light source installation part 120. The shade 140 covers the light source module 110. The material of the shade 140 is, for example, an insulator. The shade 140 has translucency. The shade 140 has, for example, a milky white or transparent color (colored transparent or colorless transparent). The light emitted from the light source 111 is irradiated onto the shade 140. The shade 140 diffuses and transmits the light emitted by the light source 111, for example.

[0025] In this embodiment, the shade 140 has a rectangular shape in a plan view (see FIG. 1). Note that the shape of the shade 140 is merely an example, and other shapes such as a flat plate shape or a dome shape may be adopted. The shade 140 functions as, for example, a light guide. The shade 140 may also have a lens function that controls the direction of light passing through. The shade 140 may also be a cover that prevents foreign matter such as dust from adhering to the light source module 110.

[0026] The base member 200 includes a housing 210, a reflector 220, and an engagement member 230. In this embodiment, when the lighting device 1 is assembled, the mounting member 130 is disposed inside the housing 210. Therefore, when the lighting device 1 is assembled, the mounting member 130 does not protrude from the outer surface of the lighting device 1. As a result, the lighting device 1 can be made smaller in size.

[0027] The housing 210 has a box shape with one side open. The housing 210 has an angular, approximately U-shape in cross section. The material of the housing 210 is, for example, a conductor. The housing 210 has an opening 210h1. The light source unit 100 is inserted into the opening 210h1 and attached to the base member 200.

[0028] The reflector 220 is attached to the housing 210 so as to surround the edge of the housing 210. When the lighting fixture 1 is attached to the top wall Wa, the outer periphery of the reflector 220 abuts against the top wall Wa. In this embodiment, the reflector 220 has a substantially rectangular ring shape (see FIG. 1). The reflector 220 reflects light that has passed through the shade 140 downward. In order to efficiently reflect the light emitted from the light source 111, it is preferable that at least the outer surface of the reflector 220 is subjected to a reflective finish. The reflective finish includes, for example, white painting, silver painting, or glossy metal plating.

[0029] The engaging member 230 has a generally L-shaped cross section. The engaging member 230 is attached to the inner surface 210a of the housing 210. Specifically, the engaging member 230 is joined to the inner surface 210a of the housing 210 by a fastener 240 such as a screw. The engaging member 230 is engaged with the mounting member 130. Specifically, the mounting member 130 is inserted into an engaging hole 233 (see FIG. 4) of the engaging member 230, and the engaging member 230 is engaged with the mounting member 130. The mounting member 130 is engaged with the engaging member 230, so that the light source unit 100 is attached to the base member 200. As a result, the lighting device 1 can be assembled.

[0030] The material of the engaging member 230 is, for example, metal. The engaging member 230 is formed, for example, by bending a metal plate. The engaging member 230 has sufficient rigidity to hold the light source unit 100.

[0031] The mounting member 130 includes an arm 133 extending from a base end 131 to a tip end 132 of the mounting member 130. That is, the arm 133 connects the base end 131 and the tip end 132 of the mounting member 130. The arm 133 is curved in a convex shape in a direction away from the light source installation part 120. Therefore, the arm 133 of the mounting member 130 can be smoothly slid while being brought into contact with an edge that forms the engagement hole 233 of the engagement member 230. As a result, the mounting member 130 can be smoothly engaged with the engagement member 230.

[0032] In addition, the mounting member 130 has a biasing force in a direction in which the tip portion 132 of the mounting member 130 is directed toward the light source installation portion 120. That is, the arm portion 133 of the mounting member 130 inserted into the engagement hole 233 biases the engagement hole 233 in a direction toward the light source installation portion 120. Therefore, the mounting member 130 and the engagement member 230 are engaged more stably than when the mounting member 130 does not have a biasing force in a direction toward the light source installation portion 120. As a result, the stability of the mounting state of the light source unit 100 to the base member 200 can be improved. In addition, when vibration is applied to the lighting fixture 1 due to shaking of the building caused by an earthquake or the like, there is a possibility that the light source unit 100 will move slightly in a direction away from the base member 200 against the biasing force of the mounting member 130, but the biasing force of the mounting member 130 will cause the light source unit 100 to move in a direction toward the base member 200, and the light source unit 100 will return to its original position (the position shown in FIG. 2). That is, even if the light source unit 100 moves downward, the light source unit 100 can return to its original position without the user having to push up the light source unit 100. Here, in order for the light source unit 100 to return to its original position by only the biasing force of the mounting member 130, it is preferable that the shape of the mounting member 130 on the base member 200, the arrangement position of the mounting member 130 in the light source installation section 120, the biasing force of the mounting member 130, the shape of the engaging member 230, and / or the mounting position of the engaging member 230 to the housing 210 be optimized.

[0033] However, in order to enable the light source unit 100 to return to its original position only by the biasing force of the mounting member 130, it may be required that the engagement position of the arm 133 of the mounting member 130 with the engagement member 230 is located within a predetermined range. The predetermined range is, for example, from a reference position P0 to a first limit position P1. The reference position P0 is an engagement position of the arm 133 with the engagement member 230 in a state in which the light source unit 100 is attached to the base member 200 as shown in FIG. 2. The first limit position P1 is a central position between the tip 132 of the mounting member 130 of the arm 133 and the reference position P0. It is preferable that the predetermined range is from the reference position P0 to a second limit position P2. The second limit position P2 is a position between the reference position P0 and the tip 132 of the arm 133, and is one-third the distance from the reference position P0.

[0034] Furthermore, the tip 132 of the mounting member 130 is bent toward the light source installation portion 120. Therefore, the mounting operation of mounting the light source unit 100 to the base member 200 and the removal operation of removing the light source unit 100 from the base member 200 can be performed efficiently.

[0035] Specifically, in the attachment work, the tip portion 132 is brought into engagement with the engagement member 230, thereby enabling the light source unit 100 to be suspended from the base member 200. Then, the light source unit 100 is pushed up, whereby the light source unit 100 is attached to the base member 200. Therefore, there is no need for an operator to support the light source unit 100 and an operator to engage the tip portion 132 with the engagement member 230, and the attachment work can be stably performed by a single operator.

[0036] In addition, in the removal operation, by pulling the light source unit 100 down from the base member 200, the tip portion 132 engages with the engagement member 230, and the light source unit 100 can be suspended from the base member 200. Then, by removing the tip portion 132 from the engagement member 230, the light source unit 100 can be removed from the base member 200. Therefore, there is no need for an operator to support the light source unit 100 and an operator to remove the tip portion 132 from the engagement member 230, and the removal operation can be stably performed by one operator.

[0037] In this embodiment, the base member 200 includes a pair of engaging members 230 (hereinafter, the first engaging member 230a and the second engaging member 230b may be distinguished from each other in the description). The first engaging member 230a is engaged with the first mounting member 130a. The second engaging member 230b is engaged with the second mounting member 130b. Therefore, the light source unit 100 can be attached to the base member 200 more stably than when the light source unit 100 is attached to the base member 200 by engaging one mounting member 130 with one engaging member 230. The base member 200 may include one engaging member 230.

[0038] Here, by engaging at least one of the first mounting member 130a and the second mounting member 130b with the engaging member 230, a space can be provided between the base member 200 and the light source unit 100 while engaging the mounting member 130 with the engaging member 230 without supporting the light source unit 100 by hand. As a result, work such as wiring and maintenance can be performed on the light source unit 100 or the base member 200 without completely removing the light source unit 100 from the base member 200. The wiring work refers to, for example, a wiring connection work when attaching the light source unit 100 to the base member 200, or a wiring removal work when removing the light source unit 100 from the base member 200.

[0039] The tip 132 of the mounting member 130 is located closer to the optical axis LA of the light source 111 than the base end 131 of the mounting member 130. Therefore, the tip 132 of the mounting member 130 can be inserted into the engagement hole 233 of the engagement member 230 from the outside to the inside of the engagement member 230 with respect to the optical axis LA. As a result, after the first mounting member 130a is engaged with the first engagement member 230a, it is not necessary to operate the mounting member 130 at a position close to the optical axis LA, and therefore it is easy to engage the second mounting member 130b with the second engagement member 230b. This in turn improves the workability of assembling the lighting fixture 1.

[0040] Next, the mounting member 130 attached to the light source installation section 120 will be described with reference to Fig. 3. Fig. 3 is a perspective view showing the light source unit 100. Fig. 3 shows the light source unit 100 as viewed obliquely from above. As shown in Fig. 3, the first mounting member 130a and the second mounting member 130b are arranged, for example, on a straight line.

[0041] The mounting member 130 includes a plurality of arms 133. Specifically, the mounting member 130 includes a first arm 133a and a second arm 133b extending along the first arm 133a. The tip 132 of the mounting member 130 includes a connecting portion 135 that connects the first arm 133a and the second arm 133b.

[0042] Moreover, the base end 131 of the mounting member 130 includes a coil spring. Specifically, the base end 131 includes two coil springs. That is, in this embodiment, the mounting member 130 is a double torsion spring in which two torsion coil springs are joined by a connecting portion 135. Therefore, the number of parts can be reduced compared to when the mounting member 130 is composed of two separate torsion coil springs. The mounting member 130 may be composed of one torsion coil spring. In this case, the mounting member 130 may be composed of one single torsion spring. The mounting member 130 may be composed of a plurality of torsion coil springs, and each of the plurality of torsion coil springs may not be joined. In this case, the mounting member 130 may be composed of a plurality of single torsion springs that are not joined.

[0043] In this embodiment, the light source unit 100 includes a plurality of mounting members 160 (hereinafter, the first mounting member 160a and the second mounting member 160b may be distinguished from each other in the description). Each of the plurality of mounting members 160 is fixed to the light source installation section 120. The mounting member 160 is fixed to the light source installation section 120 by a fastener such as a screw. The plurality of attachment members 130 are respectively attached to the light source installation section 120 by the mounting member 160. Here, the mounting member 160 may be a member separate from the light source installation section 120, or may be integrally molded with the light source installation section 120. When the mounting member 160 is integrally molded with the light source installation section 120, the mounting member 160 may be formed by bending a part of the light source installation section 120, for example.

[0044] The first mounting member 160a enters from the inside into each hole of the two coil springs at the base end 131 of the first mounting member 130a, and mounts the first mounting member 130a to the light source installation section 120. The second mounting member 160b enters from the outside into a hole of one of the two coil springs at the base end 131 of the second mounting member 130b, and mounts the second mounting member 130b to the light source installation section 120.

[0045] Next, the mounting member 130 and the engaging member 230 will be described in detail with reference to Fig. 3 and Fig. 4. Fig. 4 is a perspective view showing the mounting member 130 engaging with the engaging member 230. Note that Fig. 4 will be described taking the first mounting member 130a and the first engaging member 230a as examples.

[0046] 4, the engaging member 230 includes an engaging portion 231, an attachment portion 232, an engaging hole 233, and a hook portion 234. In this embodiment, the engaging portion 231 and the attachment portion 232 are integrally formed. The engaging portion 231 forms a substantially right angle with the attachment portion 232, for example.

[0047] An engagement hole 233 is formed in the engagement portion 231. The engagement hole 233 has a size that allows at least the tip portion 132 of the mounting member 130 to be inserted therein. Specifically, the horizontal width L3 of the engagement hole 233 is larger than the width L1 of the connecting portion 135. Furthermore, the vertical width L4 of the engagement hole 233 is larger than the width L2 of the bent portion of the tip portion 132. The engagement hole 233 includes a first groove 233a and a second groove 233b. The first groove 233a has a size that allows the first arm portion 133a to engage therewith. The second groove 233b has a size that allows the second arm portion 133b to engage therewith. Specifically, the width of each of the first groove 233a and the second groove 233b is larger than the diameter of each of the first arm portion 133a and the second arm portion 133b. When mounting member 130 engages with engaging member 230, first arm 133a engages with first groove 233a, and second arm 133b engages with second groove 233b. Therefore, even if lighting fixture 1 is subjected to an impact or the like and vibrates, arm 133 is unlikely to come out of engaging hole 233.

[0048] The hook portion 234 of the engagement member 230 is located between the first groove 233a and the second groove 233b. Therefore, even if the mounting member 130 moves downward due to an impact or the like being applied to the lighting device 1, the connecting portion 135 of the mounting member 130 abuts on and gets caught by the hook portion 234 of the engagement member 230, and the arm portion 133 is even less likely to come off the engagement hole 233. Here, each of the first groove 233a and the second groove 233b has a depth that allows the connecting portion 135 of the mounting member 130 to be caught by the hook portion 234 of the engagement member 230. For example, it is preferable that the width L5 of the hook portion 234 is smaller than the width L1 of the connecting portion 135 or equal to the width L1.

[0049] Next, a method of mounting the light source unit 100 to the base member 200 will be described with reference to Fig. 2, Fig. 5, and Fig. 6. Fig. 5 is a cross-sectional view showing the first stage of the method of mounting the light source unit 100 to the base member 200. Fig. 6 is a cross-sectional view showing the latter stage of the method of mounting the light source unit 100 to the base member 200.

[0050] As shown in FIG. 5, when attaching the light source unit 100 to the base member 200, first, the worker attaches the base member 200 to the space on the opposite side of the space irradiated by the light source 111 in the ceiling wall Wa, that is, above the ceiling wall Wa. Specifically, the worker inserts a long rod-shaped member 301 such as a hanging bolt into a through hole 210h2 formed in the housing 210. One end of the rod-shaped member 301 is fixed to, for example, a reinforcing bar of a building, that is, above the ceiling wall Wa. Then, a screw member 302 such as a washer and a hexagonal nut is screwed to the tip of the rod-shaped member 301 that has passed through the through hole 210h2. The screw member 302 is tightened until the periphery of the base member 200 abuts against the ceiling wall Wa, so that the base member 200 is attached above the ceiling wall Wa. When attaching the base member 200 above the top wall Wa, the worker passes a power line, which has been installed in advance in the building, through a through hole (not shown) of the base member 200, and draws the power line out to the inner surface 210a side of the housing 210. In this embodiment, the base member 200 is attached above the top wall Wa by two rod-shaped members 301. However, the base member 200 may be attached above the top wall Wa by one rod-shaped member 301, or may be attached above the top wall Wa by three or more rod-shaped members 301.

[0051] Next, the worker engages the second mounting member 130b with the second engagement member 230b. At this time, the bent tip portion 132 of the second mounting member 130b engages with the engagement hole 233, and the coupling portion 135 is hooked on the hook portion 234. Next, the worker connects the power line drawn out to the side of the inner surface 210a of the housing 210 to a terminal block (not shown) connected to the power supply unit 150.

[0052] Next, the worker moves the side of the light source unit 100 to which the first mounting member 130a is attached in the first movement direction D1.

[0053] 6, the worker engages the first mounting member 130a with the first engagement member 230a. At this time, the bent tip portion 132 of the first mounting member 130a engages with the engagement hole 233, and the connecting portion 135 is hooked on the hook portion 234.

[0054] Next, the worker moves the light source unit 100 in the second movement direction D2. As a result, while the arm portions 133 of the first mounting member 130a and the second mounting member 130b are biased downward by the base end portion 131, the tip portion 132 of the first mounting member 130a is guided by the first engagement member 230a and moves in the third movement direction D3, and the tip portion 132 of the second mounting member 130b is guided by the second engagement member 230b and moves in the fourth movement direction D4. As a result, the light source unit 100 is attached to the base member 200 as shown in FIG. 2.

[0055] Next, an example of a location where the mounting member 130 is installed will be described with reference to Fig. 7. Fig. 7 is a plan view showing an example of a location where the mounting member 130 is installed.

[0056] 7, the light source installation section 120 includes an installation surface 126. The installation surface 126 is a surface of the light source installation section 120 on which the mounting member 130 is installed. In this embodiment, the installation surface 126 is a surface that is approximately parallel to each of the X-axis and the Y-axis and approximately perpendicular to the Z-axis.

[0057] In this embodiment, the installation surface 126 is formed in a substantially rectangular shape in a plan view. The plan view indicates a line of sight along the Z-axis direction (a direction substantially perpendicular to the installation surface 126).

[0058] The light source mounting portion 120 further includes a first edge portion 121, a second edge portion 122, a third edge portion 123, and a fourth edge portion .

[0059] In a plan view, the first edge portion 121 to the fourth edge portion 124 are portions that form the edges (four sides) of the light source installation portion 120. The first edge portion 121 and the second edge portion 122 face each other along the X-axis direction. The third edge portion 123 and the fourth edge portion 124 face each other along the Y-axis direction.

[0060] On the installation surface 126, a pair of mounting members 130 (first mounting member 130a and second mounting member 130b) are disposed at a distance from each other. In this embodiment, the pair of mounting members 130 are disposed at a distance from each other along the X-axis direction. A base end portion 131 of the first mounting member 130a is disposed on the first edge portion 121, and a base end portion 131 of the second mounting member 130b is disposed on the second edge portion 122.

[0061] The power supply unit 150 is disposed at a location spaced apart from the center line A of the light source installation unit 120. That is, in a plan view, the power supply unit 150 is disposed at a location spaced apart from the center line A of the light source installation unit 120. In a plan view, the center line A of the light source installation unit 120 does not intersect with the power supply unit 150. In a plan view, the power supply unit 150 is located closer to the fourth edge portion 124 than the center line A of the light source installation unit 120. The power supply unit 150 is disposed so as to run along the fourth edge portion 124.

[0062] The center line A is a virtual line that passes through a center B1 of the first edge portion 121 and a center B2 of the second edge portion 122 in a plan view. In addition, the center line A passes through a center (center of gravity) B of the light source installation portion 120 in a plan view. In this embodiment, the center line A is parallel to the X-axis.

[0063] The mounting surface 126 includes a first mounting surface 126a and a second mounting surface 126b. The first mounting surface 126a is a surface of the mounting surface 126 that is located closer to the third edge portion 123 than the center line A. The second mounting surface 126b is a surface of the mounting surface 126 that is located closer to the fourth edge portion 124 than the center line A.

[0064] The position of the through hole 210h2 and the position of the mounting member 130 will be further described with reference to FIGS.

[0065] As shown in FIGS. 5 to 7, in the base member 200, the through hole 210h2 is formed on the center line (not shown) of the base member 200. The center line of the base member 200 is an imaginary line passing through the center (center of gravity) of the base member 200. When the base member 200 is attached to the top wall Wa, the screwing member 302 is screwed into the rod-shaped member 301 in a state in which the rod-shaped member 301 is inserted into the through hole 210h2 of the base member 200. At this time, since the portion on the center line of the base member 200 (the portion where the through hole 210h2 is located) is fixed, the base member 200 can be attached to the top wall Wa in a well-balanced manner.

[0066] In a state in which the base member 200 is attached to the ceiling wall Wa by the rod-shaped member 301 and the screw member 302, and the light source unit 100 is attached to the base member 200 by the attachment member 130, the center line of the base member 200 faces the center line A of the light source installation section 120. As a result, in a plan view, the rod-shaped member 301 is located on the center line A of the light source installation section 120 (see FIG. 7).

[0067] As shown in FIG. 7, the mounting member 130 is disposed at a location spaced apart from the center line A. That is, in a plan view, the mounting member 130 is disposed at a location spaced apart from the center line A. In this embodiment, in a plan view, the mounting member 130 is spaced apart from the center line A along the Y-axis direction. In a plan view, the center line A does not intersect with the mounting member 130. In addition, in a plan view, the mounting member 130 is spaced apart from the center line A, so that the mounting member 130 is spaced apart from the rod-shaped member 301 located on the center line A. This can prevent the rod-shaped member 301 from interfering with the mounting member 130 when the light source unit 100 is attached to the base member 200 (see FIGS. 5 and 6). As a result, the worker can easily perform the attachment work of the light source unit 100 to the base member 200.

[0068] 7, the base end 131 and the tip end 132 of the mounting member 130 face the second installation surface 126b of the installation surface 126. The mounting member 130 is disposed between the center line A and the power supply unit 150. That is, in a plan view, the mounting member 130 is disposed between the center line A and the power supply unit 150. As a result, the position of the mounting member 130 is shifted toward the power supply unit 150 side from the center line A.

[0069] In this embodiment, since the power supply unit 150 is located closer to the fourth edge portion 124 than the center line A, the weight balance of the light source unit 100 is biased toward the fourth edge portion 124. However, the position of the mounting member 130 is shifted toward the power supply unit 150 than the center line A. This allows the support fulcrum E of the light source unit 100 to be shifted toward the power supply unit 150 than the center line A, improving the bias in the weight balance of the light source unit 100. As a result, the light source unit 100 can be stably supported by the base member 200. Note that the support fulcrum E of the light source unit 100 indicates the connection point between the mounting member 130 and the light source installation portion 120 (the base end portion 131 of the mounting member 130).

[0070] 5, 6 and 7, the operation of the mounting member 130 will now be described in detail.

[0071] 5, 6, and 7, the mounting member 130 is rotatably supported with respect to the light source installation part 120. Specifically, a tip end 132 of the mounting member 130 rotates about the base end 131 due to the elastic force of a coil spring constituting a base end 131 of the mounting member 130.

[0072] The mounting member 130 rotates between a storage position S1 (see FIG. 5) and a mounting position S2 (see FIG. 6).

[0073] The mounting member 130 rotates between the storage position S1 and the mounting position S2 along a rotation trajectory T (see FIG. 5). In this embodiment, the rotation trajectory T is located on a plane parallel to the X-axis and the Z-axis.

[0074] The storage position S1 (see FIG. 5 ) is a position of the mounting member 130 when the base end 131 and the tip end 132 of the mounting member 130 face the light source installation unit 120. In this embodiment, when the mounting member 130 is located at the storage position S1, the mounting member 130 is oriented substantially along the installation surface 126 of the light source installation unit 120.

[0075] When the light source unit 100 is not attached to the base member 200 and the engagement member 230 is not engaged with the attachment member 130, no external force acts on the attachment member 130. As a result, the attachment member 130 is in a state of being located at the storage position S1 due to the restoring force of the coil spring constituting the base end portion 131. By positioning the attachment member 130 at the storage position S1, the attachment member 130 can be prevented from protruding in the X-axis direction and the Y-axis direction from the light source installation section 120, so that the light source unit 100 can be configured compactly. In addition, by positioning the attachment member 130 at the storage position S1, the attachment member 130 can be prevented from protruding in the Z-axis direction from the power supply section 150, so that the light source unit 100 can be configured compactly.

[0076] The mounting position S2 (see FIG. 6) is a position of the mounting member 130 when the tip 132 of the mounting member 130 is rotated away from the light source installation section 120 as compared with the storage position S1. In this embodiment, when the mounting member 130 is located at the mounting position S2, the mounting member 130 is in a posture that stands up approximately perpendicular to the installation surface 126 of the mounting member 130.

[0077] 6, when the light source unit 100 is attached to the base member 200 and the engagement member 230 is engaged with the mounting member 130, an external force (the weight of the light source unit 100) acts on the mounting member 130. As a result, the coil spring constituting the base end portion 131 is elastically deformed, and the mounting member 130 is positioned at the mounting position S2.

[0078] The power supply unit 150 is disposed at a location separated along the Y-axis direction from the rotation trajectory T (see FIG. 5) of the mounting member 130. As a result, even if the mounting member 130 is rotated along the rotation trajectory T during the operation of mounting the light source unit 100 to the base member 200, interference of the power supply unit 150 with the mounting member 130 can be suppressed.

[0079] In this embodiment, by arranging the rotation trajectory T on a plane parallel to the X-axis and Z-axis, the mounting member 130 rotates on a plane parallel to the X-axis and Z-axis. In contrast, the power supply unit 150 is located at a position separated from the rotation trajectory T along the Y-axis direction (at the rear side of the drawing in FIG. 5). As a result, it is possible to suppress interference of the power supply unit 150 with the rotational movement of the mounting member 130.

[0080] It should be noted that the lighting device 1 only needs to have a configuration (a spaced configuration) in which the power supply unit 150 is disposed at a location spaced apart from the rotation locus T of the mounting member 130. As long as the lighting device 1 has the spaced configuration, the rotation direction of the mounting member 130, the rotation range of the mounting member 130, and the direction in which the power supply unit 150 is spaced apart from the rotation locus T are not particularly limited.

[0081] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention (for example, (1) to (9) shown below). In addition, various inventions can be formed by appropriately combining multiple components disclosed in the above embodiments. For example, some components may be deleted from all components shown in the embodiments. Furthermore, components across different embodiments may be appropriately combined. The drawings are mainly schematic illustrations of each component for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of drawing. In addition, the material, shape, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

[0082] (1) As described with reference to FIG. 1, the lighting fixture 1 may be, for example, a ceiling mounted light. In this case, the base member 200 is attached directly to the ceiling. When the light source unit 100 is attached to the base member 200, the mounting member 130 is housed in the base member 200. Therefore, even if the lighting fixture 1 is a ceiling mounted light, the mounting member 130 is not visible to the user. As a result, the mounting member 130 can be prevented from being exposed, and the aesthetic appearance of the lighting fixture 1 can be improved compared to when the mounting member 130 is exposed.

[0083] Moreover, in a state where the light source unit 100 is attached to the base member 200, the attachment member 130 is housed in the housing 210 of the base member 200. That is, the base member 200 does not need to have the reflector 220 as long as it includes the housing 210 and the engaging member 230. As a result, as long as the base member 200 includes the housing 210 and the engaging member 230, the light source unit 100 can be attached to various base members 200, improving versatility. Furthermore, even if the lighting fixture 1 does not have the reflector 220, the attachment member 130 can be hidden, improving the aesthetics of the lighting fixture 1.

[0084] The above specific configuration will be described as a modified example with reference to Figs. 7 and 8. Fig. 7 is a perspective view of a lighting fixture 1a according to the modified example. Fig. 8 is a cross-sectional view of the lighting fixture 1 taken along line VIII-VIII in Fig. 7. As shown in Figs. 7 and 8, the lighting fixture 1a is, for example, a ceiling-mounted base light. When the lighting fixture 1a is a ceiling-mounted base light, the lighting fixture 1a is attached and fixed to the underside of the ceiling wall Wa by a fastener (not shown) such as a screw. In this case, the power line installed in the building in advance passes through the through hole Tha formed in the ceiling wall Wa and the through hole 210h3 formed in the housing 210, and is connected to a terminal block (not shown) connected to the power supply unit 150. The lighting fixture 1a does not have a reflector 220. The mounting member 130 is hidden inside the lighting fixture 1. Therefore, the aesthetic appearance of the lighting fixture 1a can be improved. In addition, since the reflector 220 is not necessary, the number of parts and the number of steps in assembling the base member 200 can be reduced. The configuration of lighting fixture 1a according to this modified example other than reflector 220 is similar to the configuration of lighting fixture 1 according to the preferred embodiment.

[0085] The lighting fixture may be, for example, a ceiling-embedded base light. FIG. 9 is a cross-sectional view showing a lighting fixture 1b according to a further modified example of the lighting fixture 1a shown in FIG. 8. The lighting fixture 1b is, for example, a ceiling-embedded base light. When the lighting fixture 1b is a ceiling-embedded base light, the lighting fixture 1b is embedded in an embedding hole Th formed in a top wall Wa. For example, as shown in FIG. 9, the entire lighting fixture 1b is embedded in an embedding hole Th formed in the top wall Wa. In this case, by providing a gap between the shade 140 and the top wall Wa that allows a finger to enter, the user can easily grasp the shade 140 with his or her hand, and the light source unit 100 can be easily removed from the base member 200. However, a part of the lighting fixture 1b may be embedded in the embedding hole Th formed in the top wall Wa. Specifically, for example, only the base member 200 of the lighting fixture 1b may be embedded in the embedding hole Th formed in the top wall Wa. When a part of the luminaire 1b is embedded in an embedding hole Th formed in the top wall Wa, a part of the luminaire 1b protrudes from the lower surface side of the top wall Wa.

[0086] (2) As described with reference to Fig. 2, the entire mounting member 130 faces the light source installation section 120. However, as long as the base end 131 and the tip end 132 of the mounting member 130 face the light source installation section 120, a part of the mounting member 130 does not have to face the light source installation section 120. For example, a part of the arm portion 133 of the mounting member 130 may protrude from the housing 210 when the lighting device 1 is assembled.

[0087] (3) As described with reference to Fig. 2, the mounting member 130 is a double torsion spring. However, the mounting member 130 may be a leaf spring as long as the mounting member 130 mounts the light source unit 100 to the base member 200. When the mounting member 130 is a leaf spring, the tip portion 132 of the mounting member 130 is bent.

[0088] 2, the tip end 132 of the mounting member 130 is located at a position closer to the optical axis LA of the light source 111 than the base end 131 of the mounting member 130. However, as long as the base end 131 and the tip end 132 of the mounting member 130 face the light source installation section 120, the base end 131 of the mounting member 130 may be located at a position closer to the optical axis LA of the light source 111 than the tip end 132 of the mounting member 130.

[0089] (5) As described with reference to Fig. 4, the engaging portion 231 forms a substantially right angle with the mounting portion 232. However, as long as the mounting member 130 is inserted into the engaging hole 233 formed in the engaging portion 231, the engaging portion 231 does not have to form a substantially right angle with the mounting portion 232. For example, the engaging portion 231 may be inclined with respect to the mounting portion 232.

[0090] (6) As described with reference to Fig. 2, the mounting member 130 was disposed on the light source installation portion 120 of the light source unit 100. However, the mounting member 130 may be disposed on the base member 200. Also, the engaging member 230 was attached to the housing 210 of the base member 200. However, the engaging member 230 may be attached to the light source unit 100.

[0091] (7) As described with reference to Figs. 5 and 6, the base member 200 is attached above the top wall Wa by the rod-shaped member 301 and the screw member 302. However, the base member 200 may be directly attached to a building material above the top wall Wa by a fastener such as a screw. In this case, too, as in this embodiment, the mounting member 130 is disposed at a location away from the center line A of the light source installation section 120, so that when the light source unit 100 is attached to the base member 200, the fastener can be prevented from interfering with the mounting member 130. As a result, the worker can easily perform the attachment work of the light source unit 100 to the base member 200.

[0092] (8) As described with reference to FIG. 7, the base end 131 and the tip end 132 of the pair of mounting members 130 are installed so as to face the second mounting surface 126b of the mounting surface 126. However, the present invention is not limited to this. For example, the pair of mounting members 130 (the first mounting member 130a and the second mounting member 130b) may be installed so that the base end 131 and the tip end 132 of one mounting member 130 faces the first mounting surface 126a and the base end 131 and the tip end 132 of the other mounting member 130 faces the second mounting surface 126b (first configuration). Also, the base end 131 and the tip end 132 of the pair of mounting members 130 may be installed so as to face the first mounting surface 126a of the mounting surface 126 (second configuration). As a result, in both the first and second configurations described above, the pair of mounting members 130 are arranged at a location away from the center line A in a plan view. As a result, when the light source unit 100 is attached to the base member 200, interference of the screw member 302 with the attachment member 130 can be suppressed, so that the worker can easily perform the attachment work of the light source unit 100.

[0093] (9) In this embodiment, the power supply unit 150 is installed in the light source unit 100. However, the installation location of the power supply unit 150 is not particularly limited. The power supply unit 150 may be installed in, for example, the base member 200. In this case, as in this embodiment, the power supply unit 150 is installed in a location (for example, inside the housing 210 of the base member 200) away from the center line A of the light source installation section 120 in a plan view. As a result, interference of the power supply unit 150 with the mounting member 130 can be suppressed. [Industrial Applicability]

[0094] The present invention relates to a lighting fixture and has industrial applicability. [Explanation of symbols]

[0095] 1 Lighting equipment 100 Light Source Units 111 Light source 120 Light source installation section 130 Mounting material 131 Proximal end 132 Tip 133 Arm 133a 1st arm 133b 2nd arm 135 Connection part 200 Base material 230 Engagement member LA Optical axis

Claims

1. A lighting fixture comprising: a base member having a pair of through holes through which two rod-shaped members are inserted when the lighting fixture is attached to a ceiling wall; and a light source unit attached to the base member, The light source unit includes: a light source installation section in which a light source is installed; an attachment member that is installed on the light source installation section and attaches the light source unit to the base member; a power supply unit that is disposed in the light source installation unit at a position away from a center line of the light source installation unit and supplies power to the light source; Each of the pair of through holes is formed on the center line, A lighting device in which the mounting member is arranged only at a portion of the light source installation portion that is spaced away from the center line and between the center line and the power supply portion.

2. The mounting member is supported rotatably with respect to the light source installation portion, The lighting fixture according to claim 1 , wherein the power supply unit is disposed at a location spaced apart from a rotation locus of the mounting member.

3. The lighting fixture according to claim 1 , wherein the mounting member faces the light source installation portion without protruding from the light source installation portion in a direction perpendicular to an optical axis.

Images