Lighting fixtures

Abstract

To achieve improvement in workability of construction work.SOLUTION: A lighting fixture has: a light source unit 2; and a fixture body that supports the light source unit 2. The light source unit 2 has: a light source 20; a fitting member 22 that is fitted with the light source 20; and a translucent cover 21 that is fitted to the fitting member 22 to surround the light source 20. The fitting member 22 has a plurality of side plates 221 that is provided to surround the light source 20. The translucent cover 21 is fitted to the fitting member 22 in a manner such as to be stored within a region surrounded by the plurality of side plates 221 of the fitting member 22. The fixture body has: a body part that is fitted to a construction material; and a body cover that covers the body part by being detachably linked to the body part. The body cover has an opening part that stores the light source unit 2 with a light emitting surface of the light source unit 2 exposed.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a lighting fixture. More specifically, the present invention relates to a light source unit including a light source and a lighting circuit for lighting the light source, and a lighting fixture including the light source unit and a fixture body that supports the light source unit.

Background Art

[0002] Patent Document 1 discloses a lighting fixture. This lighting fixture includes a fixture body attached to a ceiling, and a light emitting unit (light source unit) detachably provided below the fixture body. The light emitting unit includes, for example, a light emitting base having a substantially U-shaped cross section by bending both sides of the longitudinal side surface of an iron plate, a light emitting substrate provided along the lower surface of the light emitting base, and a light emitting element provided on the lower surface side of the light emitting substrate electrically connected to the light emitting substrate, such as an LED. A power supply device electrically connected to the light emitting substrate is provided on the upper surface side of the light emitting base. A connector is provided at one end of a cable extending from the power supply device, and is paired with a connector provided at one end of a cable extending downward from the ceiling through the fixture body and can be connected to each other. By connecting the connectors, the power supply device can be energized to cause the light emitting element to emit light through the light emitting substrate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a lighting fixture capable of improving the workability of construction work.

Means for Solving the Problems

[0005] A lighting fixture according to one aspect of the present invention comprises a light source unit and a fixture body that supports the light source unit. The light source unit comprises a light source, a mounting member to which the light source is attached, and a light-transmitting cover attached to the mounting member so as to cover the light source. Mounting spring and, The mounting member has a plurality of side plates arranged to surround the light source. The light-transmitting cover is attached to the mounting member such that it fits within the area surrounded by the plurality of side plates of the mounting member. The fixture body has a main body portion that is attached to the building material, and a main body cover that is detachably coupled to the main body portion and covers the main body portion. The main body has a hook spring. The main body cover has an opening that exposes the light-emitting surface of the light source unit and houses the light source unit. The opening has multiple protruding walls that extend from the edge toward the main body, a first hooking portion to which the hooking spring is detachably hooked, and a second hooking portion to which the mounting spring is detachably hooked. It has. [Effects of the Invention]

[0006] The lighting fixture described above has the effect of improving the work efficiency of construction work. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a downward perspective view of a lighting fixture according to one embodiment. [Figure 2] Figure 2A is an upward perspective view of the light source unit of the above-mentioned lighting fixture, and Figure 2B is a downward perspective view of the above-mentioned light source unit. [Figure 3] Figure 3 is a top view of the light source unit described above. [Figure 4] Figure 4 is a bottom view of the light source unit described above. [Figure 5] Figure 5A is an upward perspective view of the fixture body of the above-mentioned lighting fixture, and Figure 5B is a downward perspective view of the fixture body. [Figure 6] Figure 6 is a bottom view of the main body of the device described above. [Figure 7] Figure 7 is a cross-sectional view taken along line XX in Figure 6. [Figure 8] Figure 8 shows the light source unit temporarily suspended from the fixture body. [Figure 9]Figure 9 is an enlarged view of the connection between the light source unit and the fixture body during temporary suspension. [Figure 10] Figure 10 is a top perspective view with some of the above lighting fixtures omitted. [Figure 11] Figure 11 is a cross-sectional view of the above-mentioned lighting fixture. [Modes for carrying out the invention]

[0008] 1. Embodiment 1.1 Overview In one embodiment, as shown in Figure 1, the lighting fixture 1 comprises a light source unit 2 and a fixture body 10 that supports the light source unit 2. As shown in Figures 2B and 4, the light source unit 2 has two LED (Light Emitting Diode) modules 20, and the two LED modules 20 constitute the light source. The light source unit 2 also has a power supply unit 24 and a function unit 25, as shown in Figure 2A, and the power supply unit 24 and the function unit 25 constitute a lighting circuit that lights up the light source (LED modules 20). The light source unit 2 further has a mounting plate 220 and a protruding plate 27, and the protruding plate 27 protrudes from the mounting plate 220 in a direction intersecting the thickness direction of the mounting plate 220. As shown in Figure 2B, the two LED modules 20 are mounted on one surface (the bottom surface in Figure 2B) in the thickness direction of the mounting plate 220. On the other hand, regarding the lighting circuit, as shown in Figure 3, the function unit 25 is mounted on the mounting plate 220, but the power supply unit 24 is mounted on the protruding plate 27. In other words, at least a portion of the lighting circuit (power supply unit 24) is mounted on the protruding plate 27 rather than the mounting plate 220. Therefore, in the light source unit 2, the impact of heat generated by the light source (LED module 20) on the lighting circuit can be reduced. This advantage is also true for the lighting fixture 1 equipped with the light source unit 2.

[0009] 1.2 Configuration The lighting fixture 1 will be described in detail below. Here, lighting fixture 1 is a lighting fixture installed in a building material (for example, a ceiling). Note that lighting fixture 1 may be directly attached to the building material or may be installed in a manner that it is embedded in the building material.

[0010] As shown in Figure 1, the lighting fixture 1 comprises a light source unit 2 and a fixture body 10 that supports the light source unit 2.

[0011] As shown in Figures 2A, 2B, 3, and 4, the light source unit 2 comprises two LED modules 20, a light-transmitting cover 21, a mounting member 22, a unit cover 23, a power supply unit 24, a functional unit 25, a mounting spring 26, and a protruding plate 27. However, in the following description, unless otherwise specified, the vertical, horizontal, and front-to-back directions in Figures 2A and 2B are defined as the vertical, horizontal, and front-to-back directions of the light source unit 2.

[0012] The mounting member 22 has a square mounting plate 220 and four side plates 221 that protrude downward from each of the four sides of the mounting plate 220 (see Figures 2A and 2B). The mounting plate 220 and the four side plates 221 are integrally formed by bending a metal plate such as a galvanized steel plate. Each of the four side plates 221 is formed in an elongated trapezoidal shape.

[0013] Each of the two LED modules 20 is configured by mounting a number of LEDs 200 on the mounting surface (lower surface) of a rectangular mounting substrate 201 (see FIG. 4). Each LED 200 is an illumination white LED that emits white light. Of course, each LED 200 may be other than an illumination white LED. These plurality of LEDs 200 are arranged in a grid pattern on the mounting surface of the mounting substrate 201 and are electrically connected to each other via wiring conductors (copper foil) formed on the mounting surface. Further, on the mounting surface of each mounting substrate 201, a receptacle connector 202 electrically connected to each LED 200 via a wiring conductor is mounted. The receptacle connector 202 is removably connected to a plug connector connected to the output line of the power supply unit 24. The two LED modules 20 are attached to the lower surface of the mounting plate 220 by screwing so as to be arranged at intervals in the left-right direction (see FIG. 4).

[0014] As described above, in the light source unit 2, the power supply unit 24 and the functional unit 25 constitute a lighting circuit that lights the light sources (two LED modules 20).

[0015] The power supply unit 24 is configured to supply power to the light sources (two LED modules 20). More specifically, the power supply unit 24 has a function of lighting the light sources (two LED modules 20) with the power obtained from an external power supply (for example, a commercial AC power supply). Further, the power supply unit 24 has a function of adjusting the light output of the light sources (two LED modules 20) according to a control signal from the functional unit 25. Specifically, the power supply unit 24 includes a power supply circuit in which electronic components are mounted on a printed wiring board 241, and a case 240 that houses this power supply circuit (see FIG. 3). The power supply circuit includes an input connector 242, a rectifier, a power factor correction circuit, a step-down DC / DC converter, an output connector 243, a control connector, and the like. The input connector 242 is electrically connected to the power supply line 140 via a first terminal block 14 described later. The power supply circuit converts the AC power input from the input connector 242 into DC power, and then outputs the converted DC power from the output connector 243 via an electric wire (output line). The DC power is supplied to each LED 200 of each LED module 20 via a plug connector and a receptacle connector 202 connected to the tip of the output line. Further, the power supply circuit is configured to increase or decrease the DC power output from the output connector 243 according to a control signal input from the functional unit 25 to the control connector, and adjust (dimmer) the light output of the LED module 20.

[0016] The printed circuit board 241 is a long, rectangular, flat insulating substrate with wiring conductors (copper foil) formed on the component side. So-called leaded components such as the input connector 242, output connector 243, control connector, smoothing capacitor, and choke coil are mounted on the surface of the printed circuit board 241. Surface-mount components of the electronic components constituting the power supply circuit are mounted on the solder side of the printed circuit board 241. However, the input connector 242 and control connector are mounted on one end of the printed circuit board 241 in the longitudinal direction, while the output connector 243 is mounted on the other end of the printed circuit board 241 in the longitudinal direction. The case 240, as shown in Figures 2A and 3, is formed from a long, box-shaped metal plate. The case 240 houses the printed circuit board 241 with the input connector 242 and output connector 243 exposed.

[0017] The functional unit 25 includes a printed circuit board and a housing 250 that houses the printed circuit board (see Figure 3). The printed circuit board has an input terminal block 251. The input terminal block 251 is electrically connected to a signal line 150 drawn out from the second terminal block 15, which will be described later. The printed circuit board is configured to convert, for example, a control signal input to the input terminal block 251 via the signal line 150 into a control signal corresponding to the power supply unit 24. However, the functional unit may also be configured to convert a control signal using radio waves (wireless signal) into an electrical signal.

[0018] As shown in Figures 2A, 2B, 3, and 4, the translucent cover 21 has a square-shaped bottom portion 210, a peripheral wall portion 211 rising upward from the periphery of the bottom portion 210, and four claw portions 212 provided at the upper end of the peripheral wall portion 211. The bottom portion 210, the peripheral wall portion 211, and the four claw portions 212 are integrally formed from a translucent synthetic resin material such as acrylic resin or polycarbonate resin. In addition, at least the bottom portion 210 and the peripheral wall portion 211 are configured to diffuse light by having a textured surface. Alternatively, at least the bottom portion 210 and the peripheral wall portion 211 may be configured to diffuse light by mixing a diffusing agent into the synthetic resin material. Each claw portion 212 is formed in a hook shape and protrudes upward from the center in the longitudinal direction (front-to-back direction or left-to-right direction) at the upper end of the peripheral wall portion 211.

[0019] The light-transmitting cover 21 is attached to the mounting member 22 such that its peripheral wall portion 211 is contained within the area enclosed by the four side plates 221 of the mounting member 22 (see Figure 4). Here, in the mounting plate 220 of the mounting member 22, one through hole is provided at a position corresponding to the four claw portions 212 of the light-transmitting cover 21, that is, at the center of the longitudinal direction on each of the four sides of the mounting plate 220. Each claw portion 212 is inserted from the bottom to the top of the mounting plate 220 into the corresponding through hole and catches on the edge of the through hole on the upper surface of the mounting plate 220 (see Figures 2A and 2B). As a result, the light-transmitting cover 21 is attached to the mounting plate 220 of the mounting member 22 such that its peripheral wall portion 211 is contained inside the side plates 221.

[0020] The mounting spring 26 is a mounting device used to attach the light source unit 2 to the fixture body 10. The mounting spring 26 is composed of a torsion coil spring having a coil section 260, two arms, and a terminal section 263. The longer of the two arms is called the first arm section 261, and the shorter arm is called the second arm section. The first arm section 261 has a hook piece 264, a first arm piece 265, and a second arm piece 266. The first arm piece 265 protrudes from the terminal of the coil section 260 in the radial direction of the coil section 260 (to the left in Figure 3). However, multiple locations (for example, two locations) along the longitudinal direction of the first arm piece 265 are bent in the same direction (downward) (see Figure 2A). The hook piece 264 is formed in a U-shape when viewed from the left and right directions, connected to the tip of the first arm piece 265 at one end in the longitudinal direction, and connected to the tip of the second arm piece 266 at the other end in the longitudinal direction (see Figure 3). The rear end of the second arm piece 266 is connected to the terminal portion 263. However, multiple locations (for example, two locations) along the longitudinal direction of the second arm piece 266 are bent in the same direction (downward). The terminal portion 263 protrudes from the rear end of the second arm piece 266 almost parallel to the hook piece 264. The second arm portion protrudes from the end of the coil portion 260 in the opposite direction to the first arm portion 261 (to the right in Figure 3). In Figure 3, the second arm portion is hidden by the unit cover 23.

[0021] As shown in Figures 2A and 3, the unit cover 23 has a flat portion 230, a curved portion 231, three first mounting portions 232, and a second mounting portion 235. The flat portion 230, the curved portion 231, the three first mounting portions 232, and the second mounting portions 235 are integrally constructed from a metal plate such as a galvanized steel plate.

[0022] The flat section 230 is formed in a flat plate shape. The curved section 231 is connected to the rear end (lower end in Figure 3) of the flat section 230. The curved section 231 is curved so as to protrude upward from the rear end of the flat section 230. However, the front half of the curved section 231 curves gently as it moves away from the flat section 230, while the rear half of the curved section 231 curves sharply downward from the apex of the curved section 231 (see Figure 2A). Three first mounting sections 232 are provided, one each at the front end (upper end in Figure 3) of the flat section 230, the right end (left end in Figure 3) of the flat section 230, and the rear end (lower end in Figure 3) of the curved section 231. The curved section 231 also has a rectangular ventilation hole 2310.

[0023] The first mounting portion 232 is a portion for attaching the mounting spring 26. The three first mounting portions 232 have substantially the same configuration. The first mounting portion 232 has a first support portion 233 and a second support portion 234. The first support portion 233 is formed in the shape of a narrow plate (see Figure 3). The first support portion 233 is inserted through the coil portion 260 of the mounting spring 26 and is capable of supporting the coil portion 260 so that it can rotate around the axis of the coil portion 260 (see Figure 3). The second support portion 234 is formed in the shape of a flat plate and protrudes downward from the edge of the flat portion 230. The second support portion 234 has a hole 2340 that penetrates in the thickness direction (see Figure 2A). This hole 2340 is formed to a size through which the end portion 263 of the mounting spring 26 can be inserted. The second support portion 234 is capable of supporting the end portion 263 that is inserted through the hole 2340.

[0024] The second mounting portion 235 is formed by cutting and bending a part of the flat portion 230. The second mounting portion 235 is configured to support the functional unit 25 by hooking onto the housing 250 of the functional unit 25 (see Figures 2A and 3).

[0025] The unit cover 23 is fixed to the mounting plate 220 of the mounting member 22 with a mounting spring 26 attached to the first mounting portion 232 at the right end of the flat portion 230, and the functional unit 25 attached to the second mounting portion 235. The functional unit 25 is not directly attached to the mounting plate 220, but is indirectly attached to the mounting plate 220 by the unit cover 23. Therefore, even if the temperature of the mounting plate 220 rises due to the heat generated by the light source (LED module 20), the functional unit 25 is less affected by this temperature rise. Thus, the impact of the heat generated by the light source (two LED modules 20) on the lighting circuit (functional unit 25) can be reduced.

[0026] Here, the upper surface of the mounting plate 220 is provided with multiple screw fastening points. Each screw fastening point has a frustoconical projection that protrudes upward from the upper surface of the mounting plate 220, and a female thread provided on the upper surface of the projection. The unit cover 23 is fixed to the mounting member 22 by placing it on top of the multiple screw fastening points and then screwing multiple fixing screws 227, which are individually inserted into multiple screw insertion holes provided in the unit cover 23, into the female threads of the screw fastening points (see Figure 3). However, a space equal to the height dimension of each screw fastening point is formed between the mounting plate 220 of the mounting member 22 and the flat portion 230 of the unit cover 23. Power lines that form the electrical circuit between the first terminal block 14 and the power supply unit 24, and signal lines that form the electrical circuit between the functional unit 25 and the power supply unit 24, etc. are housed in this space. In other words, the unit cover 23 has the function of protecting these power lines and signal lines from suspension bolts, etc., by covering them from above. Although the unit cover 23 covers the mounting member 22 from above, the heat generated by the mounting member 22 as the LED module 20 temperature rises can be released to the outside (upwards) of the curved portion 231 through the ventilation holes 2310.

[0027] The protruding plate 27 protrudes from the mounting plate 220 in a direction intersecting the thickness direction of the mounting plate 220 (to the right in Figure 3). In this embodiment, the protruding plate 27 protrudes from the mounting plate 220 in a direction perpendicular to the thickness direction of the mounting plate 220. More specifically, a portion of the protruding plate 27 protrudes from the left edge of the mounting member 22 to the outside of the mounting member 22. This protruding plate 27 is also used as a hooking member for attaching the light source unit 2 to the fixture body 10. The protruding plate 27 has a flat plate portion 270 and a locking portion 271. However, the flat plate portion 270 and the locking portion 271 are integrally formed from a metal plate such as a galvanized steel plate. The flat plate portion 270 is generally rectangular in shape. The flat plate portion 270 extends in the front-to-back direction so as to cover almost the entire length of one side of the mounting plate 220. The locking portion 271 protrudes downward from one of the four sides of the flat plate portion 270 (the right-hand side in Figure 3). The longitudinal length of the locking portion 271 is greater than the longitudinal length of the flat plate portion 270 along the longitudinal direction of the locking portion 271. In other words, the locking portion 271 is a wider portion (wider part) of the protruding plate 27 than the flat plate portion 270. Such a locking portion 271 has projections 272 at both ends in the longitudinal direction that protrude outward from both ends in the longitudinal direction of the flat plate portion 270.

[0028] Approximately half of the protruding plate 270 in the shorter direction (left-right direction in Figure 3) is attached to the upper surface of the mounting plate 220 of the mounting member 22. The flat plate 270 is fixed to the mounting plate 220 by being sandwiched between the mounting plate 220 and the flat portion 230 of the unit cover 23 (see Figures 2A and 3).

[0029] As shown in Figure 3, the power supply unit 24 is mounted on the remaining half of the flat plate portion 270 in the short direction. The power supply unit 24 is screwed to the left end of the upper surface of the flat plate portion 270 of the protruding plate 27, with the longitudinal direction of the case 240 aligned with the front-to-back direction. Furthermore, as shown in Figure 3, the power supply unit 24 does not protrude on the opposite side of the mounting plate 220 (the right side in Figure 3) from the protruding plate 27 in a plane perpendicular to the thickness direction of the mounting plate 220. This reduces the possibility of the power supply unit 24 getting in the way. In particular, it reduces the possibility of the power supply unit 24 getting in the way when attaching the light source unit 2 to the fixture body 10 using the protruding plate 27.

[0030] Thus, the power supply unit 24, which is part of the lighting circuit, is mounted on the protruding plate 27, not the mounting plate 220. Therefore, even if the temperature of the mounting plate 220 rises due to the heat generated by the two LED modules 20, the power supply unit 24 is less affected by this temperature rise. Consequently, the impact of the heat generated by the light source (the two LED modules 20) on the lighting circuit (power supply unit 24) can be reduced.

[0031] Furthermore, the mounting plate 220 and the protruding plate 27 are separate components, and the protruding plate 27 is fixed to the mounting plate 220. Therefore, compared to the case where the mounting plate 220 and the protruding plate 27 are integrated, heat transfer from the mounting plate 220 to the protruding plate 27 can be suppressed, and the impact of heat generated by the light source (two LED modules 20) on the lighting circuit (power supply unit 24) can be reduced.

[0032] Furthermore, the two LED modules 20 are located on the underside of the mounting plate 220, and the power supply unit 24 is located on the upper side of the flat portion 270 of the protruding plate 27. In other words, the light source (the two LED modules 20) and at least a part of the lighting circuit (the power supply unit 24) are located on opposite sides of the mounting plate 220. Therefore, compared to the case where the light source (LED modules 20) and the lighting circuit (power supply unit 24 and functional unit 25) are on the same side of the mounting plate 220, the impact of heat generated by the light source (LED modules 20) on the lighting circuit (power supply unit 24) can be reduced.

[0033] Furthermore, the two LED modules 20 are located inside the mounting plate 220 in a plane perpendicular to the thickness direction of the mounting plate 220 (see Figure 4). In other words, the two LED modules 20 do not face the power supply unit 24 in the thickness direction of the mounting plate 220. Therefore, the transfer of heat generated by the two LED modules 20 to the power supply unit 24 can be further suppressed. In other words, the impact of heat generated by the light source (two LED modules 20) on the lighting circuit (power supply unit 24) can be further reduced.

[0034] As shown in Figures 5A and 5B, the fixture body 10 is box-shaped and has a recess 18 on one side (the bottom). The recess 18 houses the light source unit 2 so that the light source (two LED modules 20) is exposed (see Figure 1).

[0035] As shown in Figures 5A and 5B, the fixture body 10 has a main body portion 11 that is attached to the building material (ceiling) and a main body cover 12 that is detachably connected to the main body portion 11 and covers the main body portion 11. However, in the following description, unless otherwise specified, the vertical direction, front-back direction and left-right direction in Figures 5A and 5B are defined as the vertical direction, front-back direction and left-right direction of the fixture body 10.

[0036] The main body 11 is formed from a metal material such as galvanized steel sheet and is a shallow box shape with an open bottom. The outer shape of the main body 11 when viewed from above is square. A circular power supply hole 110 is provided in the center of the bottom surface of the main body 11. As shown in Figure 6, a first terminal block 14 and a second terminal block 15 are arranged near the power supply hole 110 on the bottom surface of the main body 11. The first terminal block 14 is electrically connected to the power cable 16 inserted through the power supply hole 110. The second terminal block 15 is electrically connected to the signal cable inserted through the power supply hole 110. Furthermore, a plug connector 17 is attached to the end of the power line 140 that is drawn out from the first terminal block 14. A signal line 150 is drawn out from the second terminal block 15.

[0037] Multiple bolt insertion holes 111 are also provided on the bottom surface of the main body 11 (see Figure 5A). These multiple bolt insertion holes 111 are formed in an oval shape with their long axes aligned with the front-to-back direction of the main body 11. The main body 11 is attached to the ceiling by tightening nuts onto suspension bolts that are inserted through at least two of these multiple bolt insertion holes 111.

[0038] Furthermore, as shown in Figure 6, four hook springs 13 are provided on the bottom surface of the main body 11. Each hook spring 13 is a torsion coil spring having a coil portion 130 and two arms. The longer of the two arms is called the first arm 131, and the shorter arm is called the second arm 132. The tip of the first arm 131 is bent into a hook shape (see Figure 5B).

[0039] Each hook spring 13 is attached to the main body 11 by a fitting 133 (see Figure 5B). The fitting 133 is configured to support the coil portion 130 of the hook spring 13 so that it can rotate around the axis of the coil portion 130 and move in the axial direction of the coil portion 130.

[0040] Two of the four hook springs 13 are mounted side-by-side in the left-right direction on the bottom surface of the main body 11, in front of the power port 110. The remaining two hook springs 13 are mounted side-by-side in the left-right direction on the bottom surface of the main body 11, behind the power port 110 (see Figure 6). However, the two hook springs 13 that are mounted side-by-side are positioned so that their respective second arm portions 132 are adjacent to each other.

[0041] The main body cover 12 is formed from a metal material such as galvanized steel sheet and has a frame-like shape with an opening 120 that is square when viewed from above. The opening 120 is provided to expose the light source (two LED modules 20) of the light source unit 2 to the outside. The outer part of the main body cover 12 (first part 121) of the opening 120 is formed to form the pyramidal surface of a truncated square pyramid with the opening 120 as the base (upper base). Furthermore, the outer part of the main body cover 12 (second part 122) of the first part 121 is formed to form the pyramidal surface of a truncated square pyramid with the periphery of the first part 121 as the four sides of the base (upper base). The lower surfaces of the first part 121 and the second part 122 of the main body cover 12 are painted with white paint.

[0042] As shown in Figures 5B, 6, 7, and 10, the main body cover 12 has protruding walls (the first to fourth protruding walls 123 to 126) that project upward (towards the main body 11) from each of the four edges of the opening 120. Specifically, the first protruding wall 123 protrudes from the front edge of the opening 120, the third protruding wall 125 protrudes from the rear edge of the opening 120, the second protruding wall 124 protrudes from the right edge of the opening 120, and the fourth protruding wall 126 protrudes from the left edge of the opening 120. In other words, the first protruding wall 123 and the third protruding wall 125 face each other in the front-to-back direction across the opening 120, and the second protruding wall 124 and the fourth protruding wall 126 face each other in the left-to-right direction across the opening 120. The first to fourth protrusions 123 to 126 are each rectangular plate-shaped and surround the opening 120. In the fixture body 10, the bottom surface of the main body 11, the opening 120 of the main body cover 12, and the first to fourth protrusions 123 to 126 form a recess 18.

[0043] Each of the first protruding wall 123 and the third protruding wall 125 is provided with two hooking parts (spring hooking parts) 128 (see Figures 5B and 10). On the first protruding wall 123, the two hooking parts 128 are located on both sides in the longitudinal direction (left-right direction) of the first protruding wall 123. On the third protruding wall 125, the two hooking parts 128 are located on both sides in the longitudinal direction (left-right direction) of the third protruding wall 125. The main body cover 12 is connected to the main body 11 by the spring force of each hooking spring 13, as the first arms 131 of the four hooking springs 13 of the main body 11 are hooked onto the hooking parts 128 corresponding to each hooking spring 13 (see Figures 5B and 6).

[0044] Furthermore, a hook portion (support portion) 127 is provided in the center of the second protruding wall 124 in the longitudinal direction (front-to-back direction) (see Figure 7). As shown in Figure 7, the hook portion 127 has an inverted U-shaped through hole (second mounting hole) 1271 that penetrates the second protruding wall 124 in the thickness direction (left-to-right direction). The second mounting hole 1271 is formed so that the mounting spring 26 of the light source unit 2 can pass through it.

[0045] The vertical dimension of the fourth protrusion 126 is smaller than the vertical dimension of the first to third protrusions 123 to 125 (see Figures 7 and 10). As a result, a gap 19 is formed between the bottom surface of the main body 11 and the fourth protrusion 126 (see Figure 7). The front-to-back dimension of the gap 19 is larger than the locking portion 271 of the protruding plate 27. Also, the vertical dimension of the gap 19 is larger than the power supply unit 24. In other words, the gap 19 is large enough to allow the locking portion 271 and the flat plate portion 270 of the protruding plate 27 to pass through together with the power supply unit 24.

[0046] Furthermore, the fourth protruding wall 126 is formed such that the height of the portion excluding the ends 1260 (the hook portion 129) is smaller than the height of the ends 1260 on both sides in the longitudinal direction. Note that downward-facing recesses 1290 are provided at both ends in the longitudinal direction of the hook portion 129 (see Figure 7). The space between the two ends 1260 of the fourth protruding wall 126 becomes the first mounting hole 1261. The first mounting hole 1261 is formed so as to allow at least a portion of the protruding plate 27 of the light source unit 2 to pass through. However, the dimension of the first mounting hole 1261 in the front-to-back direction is larger than the flat plate portion 270 of the protruding plate 27, but smaller than the locking portion 271. In other words, the flat plate portion 270 is large enough to pass through the first mounting hole 1261, but the locking portion 271 is not large enough to pass through the first mounting hole 1261. Therefore, when the flat plate portion 270 is placed inside the first mounting hole 1261, the locking portion 271 prevents the protruding plate 27 from coming out of the first mounting hole 1261.

[0047] In the main body of the device 10, the second protruding wall 124 and the fourth protruding wall 126 constitute a pair of side walls facing each other with the recess 18 in between. The second protruding wall 124 (one of the pair of side walls) has a second mounting hole 1271 through which the mounting spring 26 passes, and the fourth protruding wall 126 (the other of the pair of side walls) has a first mounting hole 1261 through which the protruding plate 27 passes.

[0048] 1.3 Construction work Next, an example of the work involved in installing the lighting fixture 1 on the ceiling will be described. First, the worker performing the installation inserts the power cable 16 and the signal cable into the power hole 110 of the main body 11, and then attaches the main body 11 to the ceiling by tightening nuts onto the suspension bolts inserted into the bolt insertion holes 111. The worker also connects the power cable 16 pulled in from the power hole 110 to the first terminal block 14 and the signal cable pulled in from the power hole 110 to the second terminal 15.

[0049] Next, the worker attaches the main body cover 12 to the main body 11. The worker pulls down the first arm 131 of one of the four hook springs 13 on the main body 11 and hooks the tip of the first arm 131 onto the corresponding of the four hooks 128 on the main body cover 12. The worker then hooks the tips of the first arms 131 of the remaining three hook springs 13 onto their respective hooks 128 one by one in sequence. Then, the worker lifts the main body cover 12 upwards to bring it closer to the main body 11. The first arm 131 of each hook spring 13 is displaced (rotated) upwards while remaining hooked onto the respective hooks 128. Then, when the lower edge of the main body portion 11 comes into contact with the upper surface of the first portion 121 of the main body cover 12, the connection between the main body portion 11 and the main body cover 12 is maintained by the spring force of the four hook springs 13 that are hooked onto the four hook portions 128 (see Figure 5B).

[0050] The fixture body 10 is installed on the ceiling using the procedure described above. Next, the procedure for installing the light source unit 2 on the fixture body 10 will be explained.

[0051] As shown in Figure 9, the worker inserts the locking portion 271 of the protruding plate 27 into the gap 19 between the fourth protruding wall 126 and the bottom surface of the main body 11 through the opening 120, and then hooks the protrusions 272 on both sides of the locking portion 271 onto the ends 1260 on both sides of the fourth protruding wall 126. This allows the flat portion 270 of the protruding plate 27 to pass through the first mounting hole 1261. As described above, the dimensions of the first mounting hole 1261 in the front-to-back direction are larger than the flat portion 270 of the protruding plate 27, but smaller than the locking portion 271. Therefore, the protruding plate 27 is difficult to remove from the first mounting hole 1261. A power supply unit 24 is attached to the protruding plate 27. However, the power supply unit 24 does not protrude from the protruding plate 27 on the opposite side of the mounting plate 220 in a plane perpendicular to the thickness direction of the mounting plate 220. Therefore, the power supply unit 24 is less likely to get in the way when passing the protruding plate 27 through the first mounting hole 1261. Note that in Figure 9, some components of the fixture body 10 have been omitted simply for the sake of simplifying the drawing.

[0052] As a result, as shown in Figure 8, the light source unit 2 can be temporarily suspended from the fixture body 10. With the light source unit 2 temporarily suspended from the fixture body 10, the worker connects the power line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 to the power supply unit 24. After completing the connection work, the worker inserts the first arm 261 of the mounting spring 26 into the through hole (second mounting hole) 1271 of the hooking part 127 provided in the second protruding wall 124, and then lifts the light source unit 2 and places it into the opening 120 of the main body cover 12. Once the light source unit 2 is placed inside the opening 120, the first arm 261 of the mounting spring 26 hooks onto the hooking part 127 of the second protruding wall 124. Furthermore, the locking portion 271 of the protruding plate 27 moves away from the opening 120, and the protruding plate 27 is hooked onto the hook portion 129 provided on the fourth protruding wall 126 (see Figure 10). In other words, the mounting spring 26 is supported by the hook portion 127, and the protruding plate 27 is supported by the hook portion 129. As a result, the light source unit 2 is supported by the fixture body 10 (body cover 12) by a single mounting spring 26 and the protruding plate 27.

[0053] In this way, the fixture body 10 supports the light source unit 2 with the protruding plate 27 and mounting spring 26 of the light source unit 2 inserted through the first mounting hole 1261 and the second mounting hole 1271, respectively. Therefore, the light source unit 2 is stably supported by the fixture body 10. Furthermore, as shown in Figure 11, the protruding plate 27 is located not in the recess 18, but in the space enclosed by the main body portion 11 of the fixture body 10 and the first portion 121 and the second portion 122 of the main body cover 12 (i.e., inside the fixture body 10). As a result, the power supply unit 24, which is located on the protruding plate 27, is housed inside the fixture body 10 rather than in the recess 18. This protects the power supply unit 24 from the air heated by the heat generated by the light source (LED module 20), and further reduces the impact of the heat generated by the light source (LED module 20) on the lighting circuit.

[0054] The installation of lighting fixture 1 is completed following the steps described above.

[0055] Here, the main body 11 and the main body cover 12 are lighter than the fixture body 10 which is formed by combining the main body 11 and the main body cover 12. Therefore, as mentioned above, if the main body 11 and the main body cover 12 can be installed separately, the number of installation steps will increase, but the workload on the workers can be reduced. Furthermore, the light source unit 2 is attached to the fixture body 10 which is mounted on the ceiling. As a result, the lighting fixture 1 can be made more efficient in terms of installation work.

[0056] Furthermore, since the light source unit 2 is attached to the main body cover 12, variations in the positional relationship between the main body cover 12 and the light source unit 2 can be suppressed compared to the case where the light source unit 2 is attached to the main body 11. As a result, the lighting fixture 1 can suppress the deterioration of appearance quality caused by variations in the positional relationship between the main body cover 12 and the light source unit 2.

[0057] 2. Variations The embodiments described above are merely one of many embodiments of the present invention. Furthermore, the above embodiments can be modified in various ways depending on the design, etc., as long as the objectives of the present invention are achieved. The following lists some modifications of the above embodiments.

[0058] Furthermore, lighting fixture 1 may be a lighting fixture directly attached to a building material other than the ceiling (for example, a wall), or a recessed lighting fixture embedded in a building material (for example, a ceiling or wall).

[0059] Furthermore, the light source unit 2 does not necessarily have to be equipped with a light-transmitting cover 21 and a unit cover 23.

[0060] Furthermore, the number of LED modules 20 is not particularly limited, and the light source does not have to be an LED-based light source.

[0061] Furthermore, the lighting circuit only needs to have the function of turning on the light source, and the function of adjusting the brightness of the light source is optional. In addition, the lighting circuit may have optional functions such as turning the light source on or off in the event of a specific event (for example, when a human body is detected or when the surroundings become dark).

[0062] Furthermore, in the above embodiment, the power supply unit 24 is attached to the protruding plate 27, but the functional unit 25 may also be attached to the protruding plate 27. In short, any part of the lighting circuit that needs to be protected from heat should be attached to the protruding plate 27. In addition to the power supply unit 24 and the functional unit 25, parts that need to be protected from heat include sensors, terminal blocks, communication units, switches, and batteries. Examples of sensors include motion sensors and brightness sensors. Sensors can be used to detect specific events as described above. Terminal blocks can be used, for example, to connect devices and units that make up the lighting circuit, or to connect to external devices. Examples of communication units include wireless communication units, infrared communication units, and optical communication units. Communication units can be used for communication between the lighting circuit and external devices. This enables remote control of the lighting circuit, etc. Examples of switches include electromagnetic relays and semiconductor switching elements. Switches can be used, for example, to turn on, turn off, and dim the LED module 20. Batteries can be either primary or secondary batteries. Batteries can be used, for example, to keep the lighting circuit operational during emergencies such as power outages.

[0063] Alternatively, both the power supply unit 24 and the function unit 25 may be mounted on the protruding plate 27. In other words, not just a part of the lighting circuit, but the entire lighting circuit may be mounted on the protruding plate 27.

[0064] Furthermore, in the above embodiment, the power supply unit 24 is positioned on the upper surface of the flat portion 270 of the protruding plate 27, so that the LED module 20 and the power supply unit 24 are located on opposite sides of the mounting plate 220. However, the power supply unit 24 may be positioned on the lower side of the flat portion 270. In other words, the light source (LED module 20) and at least a part of the lighting circuit (power supply unit 24) may be located on the same side of the mounting plate 220.

[0065] Furthermore, the mounting member 22 does not necessarily have to have four side plates 221. The mounting plate 220 does not necessarily have to be square, and may be other shapes such as rectangles, circles, or polygons.

[0066] Furthermore, the light source unit 2 may have a mounting fixture of a different shape from the mounting spring 26. The mounting fixture may be, for example, a projection that protrudes from the mounting plate 220 in the opposite direction to the projection plate 27.

[0067] Furthermore, the protruding plate 27 does not necessarily need to have a locking portion 271. The flat plate portion 270 only needs to be large and shaped so as to be able to support at least a part of the lighting circuit, and its shape is not particularly limited. Also, the protruding plate 27 may be formed integrally with the mounting plate 220.

[0068] Furthermore, the shapes of the main body portion 11 and the main body cover 12 in the device body 10 are not limited to the shapes of the above embodiment. For example, although the main body portion 11 and the main body cover 12 in the above embodiment have a square outer shape when viewed from above, they may be circular or polygonal, such as a rectangle. In particular, the shape of the main body cover 12 is not limited to the shape of a combination of two conical surfaces as described above. For example, the main body cover 12 may be flat. Also, the first protrusion 123 and the third protrusion 125 are not essential for the main body cover 12. In addition, the lower surfaces of the first portion 121 and the second portion 122 of the main body cover 12 do not have to be painted with white paint.

[0069] Furthermore, the main body 11 and the main body cover 12 do not necessarily have to be joined using the hook spring 13. For example, a screw may be used instead of the hook spring 13. Alternatively, the main body 11 and the main body cover 12 may be formed as a single unit.

[0070] 3. Appearance As is clear from the embodiments and modifications described above, the light source unit (2) of the first embodiment comprises a light source (20), lighting circuits (24, 25) for lighting the light source (20), a mounting plate (220), and a protruding plate (27). The light source (20) is mounted on one surface of the mounting plate (220) in the thickness direction. The protruding plate (27) protrudes from the mounting plate (220) in a direction intersecting the thickness direction of the mounting plate (220). At least a portion of the lighting circuits (24, 25) is attached to the protruding plate (27). According to the first embodiment, the influence of heat generated by the light source (20) on the lighting circuits (24, 25) can be reduced.

[0071] A light source unit (2) of the second embodiment can be realized by combining it with the first embodiment. In the second embodiment, the light source (20) and at least a portion of the lighting circuits (24, 25) are located on opposite sides of the mounting plate (220). According to the second embodiment, the influence of heat generated by the light source (20) on the lighting circuits (24, 25) can be reduced compared to the case where the light source (20) and the lighting circuits (24, 25) are on the same side of the mounting plate (220).

[0072] A third embodiment of the light source unit (2) can be realized by combining it with the first or second embodiment. In the third embodiment, the mounting plate (220) and the protruding plate (27) are separate, and the protruding plate (27) is fixed to the mounting plate (220). According to the third embodiment, compared to the case where the mounting plate (220) and the protruding plate (27) are integrated, the transfer of heat from the mounting plate (220) to the protruding plate (27) can be suppressed, and the influence of heat generated by the light source (20) on the lighting circuits (24, 25) can be reduced. In the third embodiment, it is further preferable that the protruding plate (27) is fixed to the mounting plate (220) on the side opposite to the one side in the thickness direction. In this case, the transfer of heat from the mounting plate (220) to the protruding plate (27) can be further suppressed.

[0073] The light source unit (2) of the fourth embodiment can be realized by combining it with any one of the first to third embodiments. In the fourth embodiment, at least a portion of the lighting circuit (24, 25) is a power supply unit (24) that supplies power to the light source (20). According to the fourth embodiment, the effect of heat generated by the light source (20) on the lighting circuit (24, 25) can be further reduced.

[0074] The light source unit (2) of the fifth embodiment can be realized by combining it with any one of the first to fourth embodiments. In the fifth embodiment, at least a portion of the lighting circuits (24, 25) does not protrude on the protruding plate (27) on the side opposite to the mounting plate (220) in a plane perpendicular to the thickness direction of the mounting plate (220). According to the fifth embodiment, the possibility that at least a portion of the lighting circuit may get in the way can be reduced.

[0075] The light source unit (2) of the sixth embodiment can be realized by combining it with any one of the first to fifth embodiments. In the sixth embodiment, the light source (20) is located inside the mounting plate (220) in a plane perpendicular to the thickness direction of the mounting plate (220). According to the sixth embodiment, the transfer of heat generated by the light source (20) to at least a part of the lighting circuit can be further suppressed. Therefore, the influence of heat generated by the light source (20) on the lighting circuits (24, 25) can be further reduced.

[0076] The lighting fixture (1) of the seventh embodiment comprises a light source unit (2) from any one of the first to sixth embodiments and a fixture body (10) that supports the light source unit (2). According to the seventh embodiment, the impact of heat generated by the light source (20) on the lighting circuit (power supply unit 24, function unit 25) can be reduced.

[0077] The lighting fixture (1) of the eighth embodiment can be realized by combining it with the seventh embodiment. In the eighth embodiment, the light source unit (2) further comprises a mounting fixture (26) that protrudes from the mounting plate (220) in the direction opposite to the protruding plate (27). The fixture body (10) has a recess (18) that houses the light source unit (2) so that the light source (20) is exposed, and a pair of side walls (124, 126) that face each other on either side of the recess (18). One of the pair of side walls (124, 126) has a first mounting hole (1261) through which at least a portion of the protruding plate (27) passes, and the other has a second mounting hole (1271) through which the mounting fixture (26) passes. The fixture body (10) supports the light source unit (2) with the protruding plate (27) and mounting bracket (26) of the light source unit (2) inserted through the first mounting hole (1261) and the second mounting hole (1271), respectively. According to the eighth embodiment, the light source unit (2) is stably supported by the fixture body (10).

[0078] A lighting fixture (1) according to the ninth embodiment can be realized by combining it with the eighth embodiment. In the ninth embodiment, the protruding plate (27) has a flat plate portion (270) and a locking portion (271). The flat plate portion (270) is sized so that at least a part of the lighting circuit (power supply unit 24, function unit 25) can be attached to it and pass through the first mounting hole (1261). The locking portion (271) is provided on the end of the flat plate portion (270) opposite to the mounting plate (220) and is sized so that it cannot pass through the first mounting hole (1261). According to the ninth embodiment, the locking portion (271) prevents the protruding plate (27) from coming out of the first mounting hole (1261). Therefore, the light source unit (2) can be temporarily suspended from the fixture body (10) by the protruding plate (27).

[0079] The lighting fixture (1) of the tenth embodiment can be realized in combination with the eighth or ninth embodiment. In the tenth embodiment, the fixture body (10) is box-shaped and has the recess (18) on one side. At least a portion of the lighting circuit (power supply unit 24, function unit 25) is housed in the fixture body (10) with the protruding plate (27) inserted through the first mounting hole (1261). According to the tenth embodiment, the lighting circuit (24, 25) can be protected from air heated by the heat generated by the light source (20), and the effect of the heat generated by the light source (20) on the lighting circuit (24, 25) can be further reduced. [Explanation of Symbols]

[0080] 1 Lighting fixtures 10. Main body of the device 18 recesses 124 Second protruding wall (side wall) 126. The fourth projection (side wall) 1261 First mounting hole 1271 Second mounting hole 2 Light source units 20 light source 24 Power supply unit (lighting circuit) 25. Functional Unit (Lighting Circuit) 26. Mounting hardware (mounting spring) 27. Protruding plate (hooking member) 220 Mounting plate 270 Flat plate part 271 Locking part (wide part)

Claims

1. Light source unit, The fixture body supporting the light source unit, It has, The aforementioned light source unit is Light source and A mounting member to which the aforementioned light source is attached, A light-transmitting cover is attached to the mounting member so as to cover the light source, Mounting spring and, Equipped with, The mounting member has a plurality of side plates arranged to surround the light source, The light-transmitting cover is attached to the mounting member such that it fits within the area surrounded by the plurality of side plates of the mounting member. The aforementioned device body is The main body is attached to the building materials, A body cover that is detachably attached to the main body and covers the main body, It has, The main body has a hook spring, The aforementioned main body cover is An opening for housing the light source unit, with the light-emitting surface of the light source unit exposed, Multiple protruding walls extending from the edge of the opening toward the main body, The first hook portion to which the aforementioned hook spring is detachably hooked, The mounting spring is attached to a second hooking portion, Having, Lighting fixtures.

2. The mounting spring is made of a torsion coil spring having a coil portion and an arm portion, The aforementioned arm portion is formed in a U-shape, The mounting spring is configured such that the coil portion and the end of the arm portion are supported by the mounting member with the arm portion protruding from the mounting member. The second hooking portion has a hole that penetrates the protruding wall in the thickness direction, and is configured such that the arm portion of the mounting spring is hooked onto the edge of the hole in the protruding wall. The light source unit is supported by the main body cover by the spring force of the mounting spring with the arm portion hooked onto the second hook portion. A lighting fixture according to claim 1.

3. The hook spring is made of a torsion coil spring having a coil portion and an arm portion, and a plurality of them are provided on the main body portion. The plurality of hook springs are provided on the main body such that they separate the respective arm portions from each other. The first hooking portion is configured such that the arm portion can be movably hooked onto it. A lighting fixture according to claim 1 or 2.

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