JP2024094409A - LED lighting device and LED lighting fixture - Google Patents

Abstract

[Problem] To provide an LED lighting device or the like that can prevent the widthwise end of a cover member from becoming dark. [Solution] The device comprises a board 11 on which LEDs 12 are arranged, a frame 20 having a main plate portion 21 to which the board 11 is attached, and a cover member 30 attached to the frame 20, the frame 20 having protruding portions 22 located on both sides of the main plate portion 21 and protruding from the main plate portion 21 toward a first direction side, and side plate portions 23 located outside the protruding portions 22 in the short direction of the frame 20 and extending toward a second direction side, the protruding portions 22 having an inclined plate portion inclined with respect to the main plate portion 21, and a parallel plate portion located closer to the LEDs 12 than the inclined plate portion and parallel to the main plate portion 21, the tip of the side plate portion 23, the main plate portion 21, and the end of the inclined plate portion on the side plate portion 23 side are provided in this order toward the first direction side. [Selected Figure] Figure 3

Description

The present invention relates to an LED lighting device and an LED lighting fixture equipped with an LED lighting device.

LED lighting fixtures that use LEDs (Light Emitting Diodes) are known. For example, a lighting fixture that is installed on a ceiling includes a long LED lighting device called a light bar and a long fixture body that has a recess into which the LED lighting device can be detachably attached.

This type of LED lighting device includes a long substrate, multiple LEDs mounted on the substrate, a long, light-transmitting cover member that covers the multiple LEDs, and a long frame that supports the substrate and to which the cover member is attached (for example, Patent Documents 1 and 2).

JP 2016-149332 A JP 2018-152263 A

However, conventional LED lighting devices have an issue in that the ends of the cover member in the width direction become dark. In particular, as in the LED lighting devices disclosed in Patent Documents 1 and 2, when protrusions are formed on the ends of the frame in the width direction so as to protrude toward the floor in order to increase the strength of the frame, the ends of the cover member in the width direction become dark.

The present invention was made in consideration of these problems, and aims to provide an LED lighting device that can prevent the ends of the cover member in the width direction from becoming dark, and an LED lighting fixture equipped with the LED lighting device.

In order to achieve the above object, one aspect of the LED lighting device according to the present invention comprises a substrate on which LEDs are arranged, an elongated frame having a main plate to which the substrate is attached, and a cover member attached to the frame so as to cover the LEDs. When the direction of the light emission side of the LEDs is defined as a first direction with respect to the main plate and the direction opposite to the first direction is defined as a second direction, the frame has protrusions located on both sides of the main plate in the short direction of the frame and protruding from the main plate toward the first direction, and side plate portions located outside the protrusions in the short direction of the frame and extending toward the second direction, the protrusions having an inclined plate portion inclined with respect to the main plate portion and a parallel plate portion located closer to the LED than the inclined plate portion and parallel to the main plate portion, and the tip of the side plate portion, the end of the main plate portion, and the end of the inclined plate portion on the side plate portion side are arranged in this order toward the first direction.

An embodiment of the LED lighting fixture according to the present invention includes the above-mentioned LED lighting device and a fixture body having a recess in which the LED lighting device is stored.

It is possible to realize an LED lighting device that prevents the widthwise ends of the cover member from becoming dark.

FIG. 1 is a perspective view of an LED lighting device according to an embodiment. FIG. 2 is an exploded perspective view of the LED lighting device according to the embodiment. FIG. 3 is a cross-sectional view of an LED lighting device according to an embodiment. FIG. 4 is a cross-sectional view of an LED lighting device according to an embodiment. FIG. 5 is a perspective view of the LED illumination device according to the embodiment as viewed from the cover member side. FIG. 6 is a perspective view of the LED lighting device according to the embodiment as viewed from the back side. FIG. 7 is a cross-sectional perspective view of an LED lighting device according to an embodiment. FIG. 8 is an exploded perspective view of the LED lighting device according to the embodiment. FIG. 9 is a diagram for explaining a method for attaching an LED lighting device to a fixture body in an LED lighting fixture according to an embodiment. FIG. 10 is a diagram showing an example of a trajectory of light emitted from an LED in an LED lighting device according to an embodiment. FIG. 11A is a cross-sectional view of an LED illumination device according to Modification 1. FIG. FIG. 11B is a cross-sectional view showing a first modified example of the LED illumination device according to the first modified example. FIG. 11C is a cross-sectional view showing a second modified example of the LED illumination device according to the first modified example. FIG. 11D is a cross-sectional view showing a third modified example of the LED illumination device according to the first modified example. FIG. 11E is a cross-sectional view showing a fourth modified example of the LED illumination device according to the first modified example. FIG. 11F is a cross-sectional view showing a fifth modified example of the LED illumination device according to the first modified example. FIG. 12A is a cross-sectional view of an LED illumination device according to Modification 2. FIG. FIG. 12B is a cross-sectional view showing a first modified example of the LED illumination device according to the second modified example. FIG. 12C is a cross-sectional view showing a second modified example of the LED illumination device according to the second modified example. FIG. 12D is a cross-sectional view showing a third modified example of the LED illumination device according to the second modified example. FIG. 13 is a cross-sectional view of an LED lighting device according to the third modification. FIG. 14 is a cross-sectional view of an LED illumination device according to the fourth modification. FIG. 15A is a cross-sectional view of an LED illumination device according to Modification 5. FIG. FIG. 15B is a cross-sectional view of an LED illumination device according to Modification 5. FIG. 16 is a cross-sectional view showing a first modified example of the LED illumination device according to the fifth modified example. FIG. 17 is a cross-sectional view showing a second modified example of the LED illumination device according to the fifth modified example. FIG. 18 is a cross-sectional view showing a third modified example of the LED illumination device according to the fifth modified example. FIG. 19 is a cross-sectional view showing a fourth modified example of the LED illumination device according to the fifth modified example. FIG. 20 is a cross-sectional view showing a fifth modified example of the LED illumination device according to the fifth modified example. FIG. 21A is a cross-sectional view of an LED illumination device according to Modification 6. FIG. FIG. 21B is a cross-sectional view showing a first modified example of the LED illumination device according to the sixth modified example. FIG. 21C is a cross-sectional view showing a second modified example of the LED illumination device according to the sixth modified example. FIG. 22 is a cross-sectional view of an LED illumination device according to the seventh modification. FIG. 23 is a cross-sectional view of an LED illumination device according to Modification 8. As shown in FIG. FIG. 24 is a cross-sectional view of an LED illumination device according to Modification 9. As shown in FIG. FIG. 25 is a cross-sectional view of an LED illumination device according to the tenth modification. FIG. 26 is a cross-sectional view showing a modified example of the LED illumination device according to the tenth modification. FIG. 27 is a cross-sectional view of an LED illumination device according to the eleventh modification. FIG. 28 is a cross-sectional view of an LED lighting device according to the twelfth modification. FIG. 29 is a cross-sectional view of an LED lighting fixture and an LED lighting device according to the thirteenth modification. FIG. 30 is a cross-sectional view showing a first modified example of the frame. FIG. 31 is a cross-sectional view showing a second modified example of the frame. FIG. 32 is a cross-sectional view showing a third modified example of the frame. FIG. 33 is a cross-sectional view showing a fourth modified example of the frame. FIG. 34 is a cross-sectional view showing a fifth modified example of the frame. FIG. 35 is a cross-sectional view showing a sixth modified example of the frame. FIG. 36 is a cross-sectional view showing a seventh modified example of the frame. FIG. 37 is a cross-sectional view showing an eighth modified example of the frame. FIG. 38 is a cross-sectional view showing a ninth modified example of the frame. FIG. 39 is a cross-sectional view showing a tenth modified example of the frame. FIG. 40 is a cross-sectional view showing an eleventh modified example of the frame. FIG. 41 is a cross-sectional view showing a twelfth modified example of the frame. FIG. 42 is a cross-sectional view showing a thirteenth modified example of the frame. FIG. 43 is a cross-sectional view showing a fourteenth modified example of the frame. FIG. 44 is a cross-sectional view showing a fifteenth modified example of the frame. FIG. 45 is a cross-sectional view showing a sixteenth modified example of the frame. FIG. 46 is a cross-sectional view showing a seventeenth modified example of the frame. FIG. 47 is a cross-sectional view showing an eighteenth modified example of the frame. FIG. 48 is a cross-sectional view showing a nineteenth modified example of the frame. FIG. 49 is a cross-sectional view showing a twentieth modified example of the frame. FIG. 50 is a cross-sectional view showing a twenty-first modified example of the frame. FIG. 51 is a cross-sectional view showing a twenty-second modified example of the frame. FIG. 52 is a cross-sectional view showing a twenty-third modified example of the frame.

The following describes embodiments of the present invention with reference to the drawings. Note that each embodiment described below shows a specific example of the present invention. Therefore, the numerical values, components, the arrangement and connection of the components, the steps and the order of the steps, etc. shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims that show the highest concept of the present invention will be described as optional components.

Note that each figure is a schematic diagram and is not necessarily a precise illustration. In addition, in each figure, the same reference numerals are used for substantially the same configuration, and duplicated explanations are omitted or simplified. In each figure, the X-axis, Y-axis, and Z-axis represent the three axes of a three-dimensional Cartesian coordinate system, and in this embodiment, the Z-axis direction is the vertical direction, and the direction perpendicular to the Z-axis (parallel to the XY plane) is the horizontal direction. The X-axis and Y-axis are mutually orthogonal, and both are orthogonal to the Z-axis. Note that in this specification, the terms "up" and "down" do not necessarily refer to the upward direction (vertically upward) and downward direction (vertically downward) in absolute spatial recognition.

(Embodiment)
First, the configuration of an LED lighting device 1 according to an embodiment will be described with reference to Figs. 1 to 4. Fig. 1 is a perspective view of an LED lighting device 1 according to an embodiment. Fig. 2 is an exploded perspective view of the LED lighting device 1. Figs. 3 and 4 are cross-sectional views of the LED lighting device 1. Figs. 3 and 4 show cross sections of the LED lighting device 1 cut along a plane parallel to the short side direction of the LED lighting device 1. Fig. 3 shows a cross section of a portion where a power supply device 4 is present, and Fig. 4 shows a cross section of a portion where a power supply device 4 is not present.

As shown in Figures 1 to 4, the LED lighting fixture 1 of this embodiment includes a fixture body 2 and an LED lighting device 3 attached to the fixture body 2.

The fixture body 2 holds the LED lighting device 3. The fixture body 2 is installed at a predetermined location in a building. The LED lighting fixture 1 in this embodiment is a ceiling-mounted lighting fixture. Therefore, the fixture body 2 is attached to the ceiling inside the room using bolts or the like.

In this embodiment, the fixture body 2 is made of sheet metal, and is formed into a long and flat box shape in the Y-axis direction by bending the metal plate. As shown in FIG. 2, the fixture body 2 is provided with a recess 2a having a rectangular opening surface. The recess 2a is provided in a long shape along the longitudinal direction of the fixture body 2. The recess 2a is a storage section in which the LED lighting device 3 is stored, and is provided over approximately the entire length of the fixture body 2. Also, as shown in FIG. 2 and FIG. 3, on both sides of the recess 2a in the width direction of the fixture body 2, there are provided inclined surfaces 2b that extend from the opening edge 2a1 of the recess 2a and incline upward (toward the ceiling) as they go outward. As shown in FIG. 2, two slits 2c are provided on one of the pair of side surfaces of the recess 2a.

The LED lighting device 3 is an example of a lighting device that emits illumination light. In this embodiment, the LED lighting device 3 is an LED unit that uses an LED as a light source. The LED lighting device 3 is detachably attached to the recess 2a of the fixture body 2. For example, the LED lighting device 3 can be attached to the recess 2a of the fixture body 2, and the LED lighting device 3 attached to the recess 2a of the fixture body 2 can be removed from the recess 2a. As will be described in detail later, the LED lighting device 3 and the fixture body 2 can be fixed by hooking and engaging the hook fitting 5 and the elastic holding member 6 (kick spring in this embodiment) provided on the LED lighting device 3 to the fixture body 2. The hook fitting 5 is a fitting for attaching the LED lighting device 3 to the fixture body 2. In this embodiment, the hook fitting 5 is a slide fitting.

As shown in FIG. 3, the LED lighting device 3 emits light using power supplied from a power supply device 4 housed in the fixture body 2. The power supply device 4 is a device for supplying power to the light source unit 10 of the LED lighting device 3.

The power supply unit 4 is disposed on the rear side of the LED lighting device 3. Specifically, the power supply unit 4 is disposed in the recess 2a of the fixture body 2. In this embodiment, the power supply unit 4 is attached to the LED lighting device 3 as a part of the LED lighting device 3 and is integrated with the LED lighting device 3. Note that the power supply unit 4 may not be integrated with the LED lighting device 3, but may be disposed in the fixture body 2 separately from the LED lighting device 3. For example, the power supply unit 4 may be fixed to the fixture body 2.

The power supply device 4 is composed of a power supply circuit that generates power for emitting light from the LED lighting device 3. Specifically, the power supply device 4 has a circuit board 4a such as a printed wiring board, and a plurality of electronic components 4b mounted on the circuit board 4a. In this embodiment, the power supply device 4 further has a circuit case 4c that houses the circuit board 4a on which the plurality of electronic components 4b are mounted. The circuit case 4c is a cover that covers the circuit board 4a on which the electronic components 4b are mounted. As an example, the circuit case 4c is a metal housing made of a metal plate. The power supply circuit that constitutes the power supply device 4 converts AC power from an external power source such as a commercial power source into DC power of a predetermined level by rectifying, smoothing, and reducing the voltage, and supplies the DC power to the LEDs of the LED lighting device 3.

The power supply unit 4 is supplied with AC power via a power terminal block 8 (see FIG. 2) to which a power line (such as a VVF cable) is connected, which is inserted from above the ceiling into a through hole in the fixture body 2 and pulled out into the recess 2a of the fixture body 2. A power line such as a VVF cable is an example of an electric wire, which is a construction electric wire. The power terminal block 8 is installed in the recess 2a of the fixture body 2.

Next, the detailed structure of the LED lighting device 3 will be described using Figs. 5 to 8 while referring to Figs. 1 to 4. Fig. 5 is a perspective view of the LED lighting device 3 according to the embodiment as seen from the cover member 30 side, and Fig. 6 is a perspective view of the LED lighting device 3 as seen from the back side. Fig. 7 is a cross-sectional perspective view of the LED lighting device 3. Fig. 8 is an exploded perspective view of the LED lighting device 3.

As shown in Figures 2, 5, and 6, the LED lighting device 3 is a long, linear light source called a light bar. The LED lighting device 3 emits light of a predetermined color, such as white light.

As shown in Figures 3, 7 and 8, the LED lighting device 3 includes a light source unit 10, a frame 20 in which the light source unit 10 is arranged, a cover member 30 that covers the light source unit 10, and an end cap 40. In this embodiment, the LED lighting device 3 includes a power supply unit 4. That is, the power supply unit 4 is provided in the LED lighting device 3. Specifically, the power supply unit 4 is attached to the ceiling side surface of the frame 20. For example, as shown in Figure 3, the power supply unit 4 is fixed to the frame 20 by screwing the circuit case 4c to the main board portion 21 of the frame 20 with screws 50.

The light source unit 10 is a light-emitting unit that emits illumination light. In this embodiment, the light source unit 10 is elongated. In this case, the elongated light source unit 10 may be a single light source unit with a length approximately equal to the overall length of the frame 20 in the longitudinal direction (Y-axis direction), or multiple light source units 10 may be arranged along the longitudinal direction of the frame 20. As shown in FIG. 8, in this embodiment, two light source units 10 are arranged along the longitudinal direction of the frame 20.

The light source unit 10 is an LED module that uses LEDs, and includes a substrate 11 and an LED 12 arranged on the substrate 11, as shown in Figures 7 and 8.

The substrate 11 is a mounting substrate for mounting the LEDs 12. In this embodiment, the substrate 11 is formed in a generally rectangular shape that is elongated in the longitudinal direction (Y-axis direction) of the frame 20. The thickness of the substrate 11 is, for example, 1.0 mm. As shown in FIG. 8, in this embodiment, two substrates 11 are arranged along the longitudinal direction of the frame 20.

The substrate 11 is, for example, a printed wiring board (printed circuit board) on which metal wiring is formed in a predetermined pattern. A resist made of an insulating resin material may be formed on the surface of the substrate 11 so as to cover the wiring in order to protect the wiring and ensure a dielectric strength voltage. The substrate 11 may be a single-sided wiring board in which wiring is formed only on the main surface on which the LEDs 12 are mounted, or a double-sided wiring board in which wiring is formed on both sides.

The base material constituting the substrate 11 may be a resin substrate made of an insulating resin material, a ceramic substrate made of a sintered body of a ceramic material such as alumina, or a metal-based substrate obtained by applying an insulating coating to the surface of a metal substrate made of a metal material such as aluminum or copper.

When the substrate 11 is made of a resin substrate, examples of the resin substrate that can be used include a glass epoxy substrate (CEM-3, FR-4, etc.) made of glass fiber and epoxy resin, a paper phenol substrate (FR-1, FR-2) made of craft paper or the like and phenol resin, a paper epoxy substrate (FR-3) made of paper and epoxy resin, or a polyimide substrate made of polyimide or the like. The substrate 11 may be a rigid substrate or a film-like flexible substrate.

The metal wiring formed on the substrate 11 is electrically connected to the power supply 4. In this case, the electrodes or connector terminals formed on the substrate 11 and the power supply 4 are connected by electric wires such as lead wires. The electric wires connecting the substrate 11 and the power supply 4 are, for example, inserted into through holes provided in the frame 20.

The substrate 11 is disposed on the frame 20. The substrate 11 has a first surface on which the LEDs 12 are mounted, and a second surface facing away from the first surface. The first surface of the substrate 11 is the surface facing the cover member 30, and the second surface of the substrate 11 is the surface facing the frame 20. In this embodiment, the second surface of the substrate 11 is in contact with the frame 20.

As shown in Figs. 7 and 8, LEDs 12 are arranged on the substrate 11. Specifically, a plurality of LEDs 12 are arranged on the first surface of the substrate 11. In this embodiment, the plurality of LEDs 12 are mounted in a linear row along the longitudinal direction (Y-axis direction) of the substrate 11 at a predetermined interval. Specifically, the plurality of LEDs 12 are mounted over substantially the entire longitudinal length of the substrate 11. Therefore, the plurality of LEDs 12 are mounted along the longitudinal direction of the frame 20 and the cover member 30. Note that the plurality of LEDs 12 may be mounted in multiple rows, rather than in a single row, along the longitudinal direction of the substrate 11. The plurality of LEDs 12 emit light when a direct current is supplied from the power supply 4 via an electric wire connecting the power supply 4 and the substrate 11.

The LED 12 is an example of a light-emitting element. In this embodiment, each of the multiple LEDs 12 is an individually packaged LED element (LED light source) with an SMD structure. Therefore, the light source unit 10 is an SMD type LED module.

The SMD type LED 12 comprises a white resin or ceramic container (package), an LED chip (bare chip) placed in the container, and a sealing material that seals the LED chip. In this embodiment, the LED 12 is a white LED element that emits white light. In this case, for example, a blue LED chip that emits blue light when powered is used as the LED chip, and a silicone resin (phosphor-containing resin) that contains a yellow phosphor such as YAG is used as the sealing material filled in the container.

The light source unit 10 configured in this manner is placed in the frame 20. Specifically, the substrate 11 of the light source unit 10 is placed in the frame 20.

The frame 20 is a long mounting member (base member) to which the light source unit 10 is attached. Specifically, the substrate 11 of the light source unit 10 is attached to the frame 20.

The frame 20 is formed in an elongated shape in the Y-axis direction, similar to the light source unit 10 and the fixture body 2. The light source unit 10 is supported by the frame 20. In this embodiment, the frame 20 not only supports the light source unit 10, but also supports the cover member 30. Specifically, the board 11 on which the LEDs 12 are arranged is placed on the frame 20 and fixed to the frame 20, so that the board 11 on which the LEDs 12 are arranged is supported by the frame 20.

The frame 20 is made of sheet metal and is composed of a metal plate. The frame 20 is formed into a predetermined shape by performing roll forming, press working, or the like on a single sheet of metal (metal plate) made of, for example, SPCC (Steel Plate Cold Commercial). The thickness of the metal plate constituting the frame 20 is, for example, 0.2 mm to 2 mm. In this embodiment, since the frame 20 is formed by sheet metal processing, it is preferable that the thickness of the metal plate constituting the frame 20 is 1 mm or less. In this embodiment, the thickness of the metal plate constituting the frame 20 is 0.5 mm.

The method of manufacturing the frame 20 is not limited to roll forming and press working, but may be aluminum extrusion molding, etc. Also, the frame 20 is not limited to being made of a metal material, but may be made of a resin material.

As shown in Figures 3 and 4, the frame 20 has a plate-shaped main plate 21 to which the substrate 11 is attached, a pair of protruding portions 22, and a pair of side plate portions 23. The protruding portions 22 are provided between the main plate 21 and the side plate portions 23. Specifically, one of the protruding portions 22 is connected to the main plate 21, and the other of the protruding portions 22 is connected to the side plate portions 23. As shown in Figure 8, the main plate 21, the pair of protruding portions 22, and the pair of side plate portions 23 all extend along the Y-axis direction.

The main board 21 is the main body of the frame 20, and as shown in FIG. 3, the board 11 on which the LEDs 12 are arranged is placed on the main board 21. In other words, the main board 21 supports the board 11. In this embodiment, the board 11 and the main board 21 are in contact.

The main board portion 21 is a long plate having a first surface facing the substrate 11 and a second surface facing away from the first surface. When the LED lighting device 1 is installed on a ceiling, the frame 20 is positioned so that the first and second surfaces of the main board portion 21 are approximately parallel to the ceiling surface. In this case, the first surface of the main board portion 21 is the surface facing the floor, and the second surface of the main board portion 21 is the surface facing the ceiling.

The main board portion 21 is elongated in the Y-axis direction and is a plate-like portion with a constant thickness that is generally flat. The main board portion 21 is the main body of the frame 20, and the light source portion 10 is disposed on the main board portion 21. Specifically, the substrate 11 of the light source portion 10 is placed on the main board portion 21.

As shown in FIG. 3, the main plate 21 is located closer to the bottom of the recess 2a than the opening surface of the recess 2a of the fixture body 2. In this embodiment, the LED 12 is also located closer to the bottom of the recess 2a than the opening surface of the recess 2a of the fixture body 2. Specifically, the main plate 21 and the LED 12 are located closer to the ceiling than the opening edge 2a1 of the recess 2a.

As shown in FIG. 8, the main plate 21 has a claw 21a formed by cutting and raising a part of the frame 20 made of a metal plate. The substrate 11 placed on the main plate 21 is fixed to the main plate 21 by being engaged with the claw 21a. In this case, for example, the substrate 11 may be slid to be engaged with the claw 21a, or the substrate 11 may be engaged with the claw 21a by crimping the claw 21a. The method of fixing the main plate 21 and the substrate 11 is not limited to the engagement structure using the claw 21a, and the main plate 21 and the substrate 11 may be bonded and fixed with an adhesive or adhesive tape. In addition, the main plate 21 and the substrate 11 are in contact with each other, but this is not limited thereto. For example, a separate member such as a thermally conductive sheet may be inserted between the main plate 21 and the substrate 11. In addition, the main board portion 21 has a through hole through which an electric wire is inserted to electrically connect the wiring of the substrate 11 to the power supply device 4.

As shown in Figures 3 and 4, the protrusions 22 are located on both sides of the main board portion 21 in the short direction of the frame 20. In other words, one of the pair of protrusions 22 is located on one side of the main board portion 21 in the short direction of the frame 20, and the other of the pair of protrusions 22 is located on the other side of the main board portion 21 in the short direction of the frame 20.

When a first direction, which is the direction of the light emission side of the LED 12 with respect to the main board portion 21, is defined as the floor side direction, and a second direction, which is the direction opposite the floor side direction (first direction) with respect to the main board portion 21, is defined as the ceiling side direction, each of the pair of protrusions 22 protrudes from the main board portion 21 toward the floor side (first direction). In other words, the pair of protrusions 22 are located closer to the floor than the main board portion 21.

In addition, at least a portion of the pair of protrusions 22 is located closer to the floor than the opening surface of the recess 2a of the device body 2. In other words, at least a portion of the pair of protrusions 22 is located closer to the floor than the opening edge 2a1 of the recess 2a.

The pair of protrusions 22 can be formed by pressing a portion of the metal plate that constitutes the frame 20 so that it protrudes toward the floor. Therefore, the plate thickness of the protrusions 22 and the plate thickness of the main plate portion 21 are the same.

As shown in the enlarged view of FIG. 3, each of the pair of protruding portions 22 has a first plate portion 22a, a second plate portion 22b located on one side of the first plate portion 22a, and a third plate portion 22c located on the other side of the first plate portion 22a. In other words, the first plate portion 22a, the second plate portion 22b, and the third plate portion 22c are part of the protruding portion 22, and the first plate portion 22a is located between the second plate portion 22b and the third plate portion 22c.

The first plate portion 22a is a parallel plate portion parallel to the main plate portion 21. The second plate portion 22b is an inclined plate portion inclined relative to the main plate portion 21. The third plate portion 22c is an erect plate portion erected relative to the main plate portion 21.

The first plate portion 22a is located closer to the floor than the opening surface of the recess 2a of the device body 2. In other words, the first plate portion 22a is located closer to the floor than the opening edge 2a1 of the recess 2a. The inclined second plate portion 22b is located outside the first plate portion 22a and is connected to the end of the side plate portion 23. The third plate portion 22c, which is an upright plate portion, is located inside the first plate portion 22a and is connected to the end of the main plate portion 21. Therefore, the protrusion 22 is configured to be inclined outward as a whole.

The protruding portion 22 may be configured to be inclined inward. In this case, the inclined second plate portion 22b is located inside the first plate portion 22a and is connected to the end of the main plate portion 21, and the erected third plate portion 22c is located outside the first plate portion 22a and is connected to the end of the side plate portion 23.

The first plate portion 22a, the second plate portion 22b, and the third plate portion 22c are all located on both sides of the main plate portion 21 in the short direction of the frame 20, and are located closer to the floor (first direction side) than the main plate portion 21. In addition, the first plate portion 22a, the second plate portion 22b, and the third plate portion 22c are all flat. In other words, the first plate portion 22a, the second plate portion 22b, and the third plate portion 22c are flat.

The pair of side plate portions 23 are plate-shaped side portions and are formed as a pair of legs on the frame 20. Each of the pair of side plate portions 23 extends toward the floor. Specifically, each of the pair of side plate portions 23 extends in the Z-axis direction from both ends of the main plate portion 21 in the short direction (X-axis direction). The side plate portions 23 extend from the outer ends of the protruding portion 22 in the short direction of the frame 20. Specifically, the side plate portions 23 extend from the second plate portion 22b of the protruding portion 22 toward the ceiling side.

In this embodiment, the connection portion between the side plate portion 23 and the protruding portion 22 is located on the floor side (first direction side) of the main plate portion 21. The side plate portion 23 extends from the protruding portion 22 beyond the position of the main plate portion 21 toward the ceiling side, but is not limited to this. For example, the length of the side plate portion 23 in the Z axis direction may be the length from the protruding portion 22 to the position of the main plate portion 21, or may be shorter than the length from the protruding portion 22 to the position of the main plate portion 21. In other words, the tip portion on the ceiling side of the side plate portion 23 may be located closer to the ceiling than the height position of the LED 12, may be at the same height position as the LED 12, or may be located closer to the floor than the height position of the LED 12.

The tip portions of the pair of side plate portions 23 are provided with bent portions 23a that are formed to be bent. In this embodiment, the bent portions 23a are bent portions formed by folding the tip portions of the side plate portions 23 in the thickness direction. Therefore, the bent portions 23a are composed of a folded portion and a portion (a portion that is not folded) that faces the folded portion. The folded portion of the bent portion 23a can be formed, for example, by curling and rolling up the tip portions of the side plate portions 23. Note that the bent portion 23a is not limited to being formed by curling, but may be formed by hemming or the like. Note that the bent portion 23a formed by curling or hemming is formed by folding inward in the width direction, but is not limited thereto, and may be formed by folding outward in the width direction. Also, the bent portion 23a may not be formed.

The mounting portion 33 of the cover member 30 is attached to each of the pair of side plate portions 23. Specifically, the bent portion 23a of the side plate portion 23 is snapped into and fitted into the recessed portion 33a provided in the mounting portion 33 of the cover member 30, thereby fixing the cover member 30 to the frame 20.

The light source unit 10 supported by the frame 20 is covered with a cover member 30. Specifically, the cover member 30 covers all of the LEDs 12 in the light source unit 10. As shown in FIG. 3, the cover member 30 also covers the board 11 of the light source unit 10, and is disposed opposite the board 11 so as to cover the multiple LEDs 12. In this way, the cover member 30 is attached to the frame 20 so as to cover the LEDs 12.

The cover member 30 is an example of a translucent cover that has translucency and transmits light emitted from the LED 12. In this embodiment, the cover member 30 is a diffusion cover that not only has translucency but also has diffusivity. Therefore, the light of the LED 12 that enters the cover member 30 passes through the cover member 30 while being diffused (scattered) by the cover member 30.

As shown in Figs. 6 and 7, the cover member 30 further covers the frame 20 in which the light source unit 10 is arranged. In this embodiment, the cover member 30 covers the entire frame 20 in which the light source unit 10 is arranged. Note that the cover member 30 is formed in an elongated shape in the Y-axis direction, similar to the light source unit 10 and the frame 20.

The cover member 30 is attached to the frame 20. The cover member 30 and the frame 20 form a cylindrical body, and the light source unit 10 is stored inside this cylindrical body.

As shown in Figures 3 and 7, the cover member 30 has a main portion 31 having a surface facing the LED 12, a pair of extension portions 32 connected to the main portion 31, and a pair of mounting portions 33 connected to each of the pair of extension portions 32.

As shown in FIG. 3, a gap G exists between the cover member 30 and the inner surface of the recess 2a of the device body 2. In this embodiment, this gap G is the gap between the attachment portion 33 and the inner surface of the recess 2a.

The main part 31 is the main body of the cover member 30, and transmits the light of the LED 12 to irradiate it to the outside. The main part 31 constitutes the exterior of the cover member 30. As shown in FIG. 8, the main part 31 is elongated in the Y-axis direction and formed in a gutter shape. The main part 31 is, for example, a flat, approximately semi-cylindrical shape. Therefore, the main part 31 has an elongated rectangular opening end surface extending in the Y-axis direction. In addition, the cross-sectional shape of the main part 31 when cut along the X-axis direction has a curved shape that is curved in an approximately arc shape. Note that the shape of the main part 31 is not limited to a barrel-shaped R shape, and may be an angular shape such as a U-shape, or a angular shape with a part of the side narrowed.

The main portion 31 has an outer end portion 31a that is located outside the protruding portion 22 of the frame 20 in the short direction of the frame 20. Specifically, the outer end portion 31a is a portion of the main portion 31 that is located outside the mounting portion 33. The outer end portion 31a of the main portion 31 faces the opening edge 2a1 of the recess 2a of the device body 2. The opening edge 2a1 of the recess 2a is a flat surface parallel to the XY plane.

The pair of extensions 32 are plate-shaped pieces with a constant thickness. In this embodiment, the pair of extensions 32 are formed symmetrically with respect to the center of the cover member 30 in the XZ cross section, but this is not limited to this.

Each extension portion 32 has an outer extension portion 32a that is located outside the protrusion 22 of the frame 20 in the short direction of the frame 20, and an inner extension portion 32b that extends from the outer extension portion 32a toward the LED 12 side so as to cover at least a portion of the protrusion 22.

In this embodiment, the outer extension 32a is a portion located outside the mounting portion 33, and the inner extension 32b is a portion located inside the mounting portion 33. In this case, as shown in FIG. 3, the outer extension 32a is a portion formed in a flat plate shape, and the inner extension 32b is a portion formed to bend at the protruding portion 22 of the frame 20. Specifically, the inner extension 32b has a portion that extends from the connection portion between the outer extension 32a and the mounting portion 33 toward the floor side, and a portion whose tip extends from the portion facing the protruding portion 22 of the frame 20 toward the ceiling side.

Each extension portion 32 extends from the inner surface of the main portion 31 toward the inside of the cover member 30. That is, each extension portion 32 extends from the inner surface of the main portion 31 toward the LED 12 side. Each extension portion 32 extends toward the LED side from a position on the ceiling side (second direction side) of the portion of the protruding portion 22 of the frame 20 located closest to the floor (first direction side) on the inner surface of the main portion 31. In this embodiment, the portion of the protruding portion 22 of the frame 20 located closest to the floor is the first plate portion 22a of the protruding portion 22. Therefore, the extension portion 32 extends toward the LED 12 side from a position closer to the ceiling than the first plate portion 22a. Specifically, each extension portion 32 is connected to the tip of the outer end portion 31a of the main portion 31. Therefore, in each extension portion 32, the outer extension portion 32a is connected to the tip of the outer end portion 31a of the main portion 31, and the outer extension portion 32a extends from the outer end portion 31a of the main portion 31 toward the LED 12 side.

The outer extension portion 32a has a portion that overlaps with the gap G between the inner surface of the recess 2a and the mounting portion 33 in the direction toward the floor side or the ceiling side (i.e., in the Z direction). The outer extension portion 32a also faces the opening edge 2a1 of the recess 2a. Therefore, the outer extension portion 32a is formed to span the gap G.

The portion of the outer extension 32a facing the opening edge 2a1 and the outer end 31a of the main part 31 form a protrusion that protrudes outward from the mounting part 33. Specifically, this protrusion is formed in a V-shaped cross section in the XZ cross section. The outer extension 32a does not protrude outward from the widthwise outer end of the opening surface of the recess 2a of the device body 2. Specifically, the outer extension 32a does not protrude outward in the Y-axis direction from the opening edge 2a1 of the recess 2a. Specifically, the connection portion (the apex of the V) between the outer extension 32a and the outer end 31a of the main part 31 is approximately on the same plane as the inclined surface 2b of the device body 2. As a result, the inclined surface 2b of the device body 2 and the surface of the main part 31 of the cover member 30 become a single continuous surface, improving the design of the LED lighting device 3.

The outer extension portion 32a is a contact portion that can contact the opening edge 2a1 of the recess 2a of the fixture body 2. When the LED lighting device 3 is stored in the recess 2a of the fixture body 2, the outer extension portion 32a may or may not contact the opening edge 2a1. In other words, there may be a gap between the outer extension portion 32a and the opening edge 2a1, or the outer extension portion 32a and the opening edge 2a1 may be in close contact with each other.

Each of the pair of extensions 32 extends toward the LED 12 so as to cover at least a portion of the protruding portion 22 of the frame 20. In this embodiment, the inner extension portion 32b of each extension portion 32 covers the protruding portion 22 of the frame 20.

At least a portion of each extension 32 has a shape that conforms to a portion of the frame 20. In this embodiment, at least a portion of each extension 32 has a shape that conforms to the protruding portion 22 of the frame 20. Specifically, the inner extension 32b of each extension 32 has a shape that conforms to the protruding portion 22 of the frame 20.

Each extension 32 is bent so as to protrude toward the floor side. That is, each extension 32 is formed to have a protruding portion that protrudes toward the floor side, similar to the protruding portion 22 of the frame 20. The protruding portion 22 of the frame 20 protrudes toward the bent portion (protruding portion) of this extension 32. Therefore, the protruding portion 22 of the frame 20 is formed to fit into the protruding portion of the extension 32.

In addition, at least a portion of each extension portion 32 can abut against the frame 20. Specifically, at least a portion of each extension portion 32 can abut against a portion of the protruding portion 22 of the frame 20. More specifically, each extension portion 32 can abut against the first plate portion 22a and the second plate portion 22b of the protruding portion 22.

As shown in FIG. 3, in this embodiment, the inner extension portion 32b has a first surface portion 32b1 that can abut against the first plate portion 22a of the protrusion portion 22, and a second surface portion 32b2 that can abut against the second plate portion 22b of the protrusion portion 22.

In this way, when the LED lighting device 3 is stored in the recess 2a of the fixture body 2, at least a portion of each extension portion 32 may or may not be in contact with the protrusion 22. For example, the first surface portion 32b1 and the second surface portion 32b2 of the inner extension portion 32b in the extension portion 32 may or may not be in contact with the first plate portion 22a and the second plate portion 22b of the protrusion 22 in the frame 20.

In each extension portion 32, the first surface portion 32b1 and the second surface portion 32b2 of the inner extension portion 32b are both flat, similar to the first plate portion 22a and the second plate portion 22b of the protrusion 22. In other words, the first surface portion 32b1 and the second surface portion 32b2 of the inner extension portion 32b are flat.

In the inner extension portion 32b, the first surface portion 32b1 is a parallel plate portion parallel to the main plate portion 21 of the frame 20, similar to the first plate portion 22a of the protruding portion 22 of the frame 20, and the second surface portion 32b2 is an inclined plate portion inclined with respect to the main plate portion 21 of the frame 20, similar to the second plate portion 22b of the protruding portion 22 of the frame 20. The first surface portion 32b1 of the inner extension portion 32b and the first plate portion 22a of the protruding portion 22 are parallel and face each other. Similarly, the second surface portion 32b2 of the inner extension portion 32b and the second plate portion 22b of the protruding portion 22 are parallel and face each other.

In this embodiment, at least a portion of each extension 32 is in contact with the protruding portion 22. Specifically, the first surface 32b1 of the inner extension 32b of each extension 32 is in contact with the first plate 22a of the protruding portion 22. Also, the second surface 32b2 of the inner extension 32b of each extension 32 is in contact with the second plate 22b of the protruding portion 22.

The tip of each extension 32 is located closer to the center of the frame 20 than the protruding portion 22 of the frame 20. In other words, the tip of each extension 32 is located closer to the center of the frame 20 than the first plate portion 22a, the second plate portion 22b, and the third plate portion 22c of the protruding portion 22.

The extension portion 32 is formed so that its tip extends toward the substrate 11. Specifically, the inner extension portion 32b of the extension portion 32 is formed so that it is inclined toward the substrate 11. Note that the inner extension portion 32b may not be inclined and may extend parallel to the substrate 11, similar to the outer extension portion 32a.

In the Z-axis direction, the tip of the extension portion 32 overlaps with the substrate 11. In this embodiment, the tip of the extension portion 32 is in contact with the substrate 11. Specifically, the tip of the inner extension portion 32b of the extension portion 32 is in contact with the main surface of the substrate 11. This makes it possible to prevent insects from invading the space between the main portion 31 of the cover member 30 and the main plate portion 21 of the frame 20 even if the insects invade through the gap between the mounting portion 33 of the cover member 30 and the side plate portion 23 of the frame 20. In addition, by pressing down the substrate 11 with the extension portion 32, it is possible to prevent the frame 20 to which the substrate 11 is attached from shifting toward the floor. Furthermore, even if the adhesive peels off when the substrate 11 is fixed to the frame 20 with adhesive or the like, the substrate 11 that is detached from the frame 20 is supported by the extension portion 32. In other words, it is possible to prevent the substrate 11 from falling.

Each extension portion 32 is preferably located outside the illumination angle (e.g., 1/2 beam angle) of the LED 12. For example, if the light of the LED 12 is directly incident on the extension portion 32, it is desirable to position the extension portion 32 outside the illumination angle of the LED 12. This reduces the loss of light emitted from the LED 12 in the cover member 30, and allows most of the light emitted from the LED 12 to pass through the cover member 30 and be emitted to the outside. In other words, the light extraction efficiency of the cover member 30 can be improved.

There is a space between each extension 32 and the frame 20. Specifically, there is a space between each extension 32 and the main plate 21 of the frame 20. This space can accommodate the base or head of a screw when various components are screwed together, or the crimped portion when the frame 20 is crimped to another metal component. For example, as shown in FIG. 3, this space accommodates the base of a screw 50 for fixing the power supply unit 4 to the frame 20.

In addition, functional parts may be stored in the space between each extension part 32 and the frame 20, or internal electric wires may be stored in the space. The functional parts may be, for example, a function expansion module. Examples of the function expansion module include a sensor unit equipped with various sensors such as a human sensor and a brightness sensor, a wireless module having an antenna and a control circuit for receiving wireless signals, an infrared module having a light receiving element and a control circuit for receiving infrared signals, or a second light source other than the LED 12 (first light source) mounted on the substrate 11. The wireless signal or infrared signal is, for example, a remote control signal for turning on and off the LED 12 or adjusting the brightness and color, or a setting signal for performing various settings of the LED lighting device 3. In addition, the second light source is a light source for monitor display, a light source for controlling the light distribution of the illumination light emitted from the cover member 30 (for example, a light source for wide light distribution), a color light source for directing (for example, red, blue, green, etc. LED light source), or an emergency light source that turns on in an emergency. In addition, when an emergency light source is used as the second light source, the cover and/or cover member 30 that covers the second light source should be made of a flame-retardant material such as glass.

The pair of mounting parts 33 are parts that are attached to the frame 20, and are formed as a pair of legs on the cover member 30. Specifically, the pair of mounting parts 33 are attached to a pair of side plate parts 23 of the frame 20.

Each of the pair of mounting portions 33 extends from a part of the extension portion 32 toward the ceiling side. The pair of mounting portions 33 have the same length in the Z-axis direction. As shown in FIG. 7, each of the pair of mounting portions 33 is formed in an elongated shape along the Y-axis direction. The pair of mounting portions 33 also have the same length in the Y-axis direction.

As shown in Figures 6 and 7, a recess 33a is formed on the inside of the tip of each of the pair of mounting portions 33 in the width direction (X-axis direction). The bent portions 23a provided at the tip of the side plate portions 23 of the frame 20 are fitted into these recesses 33a, whereby the pair of mounting portions 33 of the cover member 30 and the pair of side plate portions 23 of the frame 20 are engaged and fixed to each other. As a result, the pair of mounting portions 33 of the cover member 30 are fixed to the frame 20 in a manner that embraces the frame 20.

The side plate portion 23 of the frame 20 and the mounting portion 33 of the cover member 30 may be fixed together with a screw. The screw is screwed into the portion where the side plate portion 23 and the mounting portion 33 overlap from the outside of the mounting portion 33.

In addition, in this embodiment, the recess 33a is formed so that the tip is folded back, and the cross-sectional shape of the recess 33a is approximately U-shaped or U-shaped. Note that the shape of the recess 33a is not limited to this. For example, the recess 33a may be formed so that the cross-sectional shape is L-shaped and the tip is not folded back, or the cross-sectional shape may be V-shaped or arc-shaped. However, it is preferable that the recess 33a has a shape into which the folded portion 23a is fitted.

The cover member 30 is made of a translucent resin material such as acrylic or polycarbonate, or a translucent material such as a glass material. In this embodiment, the cover member 30 is made of a translucent resin material. In this case, the cover member 30 can be a milky white cover member with a light diffusing material dispersed therein. Such a cover member 30 can be produced by resin molding a translucent resin material mixed with a light diffusing material into a predetermined shape. Light reflective fine particles such as silica particles can be used as the light diffusing material.

The cover member 30 may be configured by forming a milky light diffusion film containing a light diffusion material on the surface (inner or outer surface) of the transparent cover, rather than dispersing a light diffusion material inside. The cover member 30 may also be configured to have light diffusion properties by performing a diffusion process, rather than using a light diffusion material. For example, the cover member 30 may be configured to have light diffusion properties by forming minute irregularities on the surface of the transparent cover by performing a surface treatment such as embossing, or by printing a dot pattern on the surface of the transparent cover. Even when the cover member 30 is diffusion processed, it may further contain a light diffusion material to enhance light diffusion properties.

In this embodiment, the main portion 31, the extension portion 32, and the mounting portion 33 that constitute the cover member 30 are integrally formed. Therefore, the main portion 31, the extension portion 32, and the mounting portion 33 are made of the same material. In addition, the main portion 31, the extension portion 32, and the mounting portion 33 all have the same thickness, but this is not limited to this.

A long cylindrical body is formed by fixing the cover member 30 and the frame 20. End caps 40 are attached to both ends of the cylindrical body formed by the cover member 30 and the frame 20 in the longitudinal direction.

In this embodiment, the end cap 40 is provided to close the open end of the cylinder formed by the frame 20 and the cover member 30. In other words, the end cap 40 is attached to the cylinder so as to cover the open end of the cylinder formed by the frame 20 and the cover member 30, and closes the open end of the cylinder. This makes it possible to prevent dust, insects, etc. from entering the inside of the cylinder formed by the frame 20 and the cover member 30. Note that the end cap 40 may not completely close the open end of the cylinder formed by the frame 20 and the cover member 30, and there may be a small gap between the end cap 40 and the frame 20.

The end caps 40 are provided at both longitudinal ends of the cover member 30. In other words, the end caps 40 are cover ends provided at the ends of the cover member 30. The end caps 40 are directly or indirectly connected to the longitudinal ends of the cover member 30. The end caps 40 and the cover member 30 may be fixed with an adhesive or may be fixed by ultrasonic welding. In addition, the end caps 40 and the cover member 30 may be provided with a locking structure such as a claw portion or a recess portion to join the end caps 40 and the cover member 30.

The end cap 40 is made of a resin material. The end cap 40 may or may not be translucent. The translucent end cap 40 is made of a translucent resin material such as acrylic or polycarbonate, or a translucent material such as a glass material. The end cap 40 may be translucent and diffusive. In this case, the end cap 40 may be made of the same material as the cover member 30, or may be made of a material different from the cover member 30.

As shown in Figures 3 and 4, a spatial area S is formed on the ceiling side of the main board portion 21 of the frame 20. In other words, the spatial area S exists between the fixture body 2 and the main board portion 21 of the frame 20. As shown in Figure 3, the power supply unit 4 is disposed in this spatial area S. In other words, the power supply unit 4 is disposed on the ceiling side of the main board portion 21 of the frame 20.

The spatial region S may also contain electrical wires used in the LED lighting device 3. The electrical wires used in the LED lighting device 3 include internal electrical wires that are wired in a factory when the LED lighting device 3 is manufactured, and construction electrical wires that are wired when the LED lighting device 1 is installed on a ceiling or the like. The internal electrical wires and construction electrical wires are arranged on the ceiling side of the main board portion 21 of the frame 20.

The electric wires inside the fixture include electric wires connected to the power supply 4 and electric wires connecting the multiple light source units 10 together. Of these, the electric wires connected to the power supply 4 include a power supply line connecting the power supply 4 and the light source units 10, a power line connecting the power supply 4 and the power terminal block 8, a dimming control line connecting the power supply 4 and the dimming terminal block (not shown), and a control line connected to a function expansion module (sensor, etc.) described later.

The construction wires include power lines such as VVF cables and signal lines such as dimming signal lines. The construction wires such as power lines and signal lines are, for example, pulled out from the ceiling and connected to predetermined locations on the LED lighting fixture 1 when the LED lighting fixture 1 is installed. For example, the power line such as the VVF cable is connected to the power terminal block 8, and the dimming signal line is connected to the dimming terminal block.

Any method may be used for wiring the internal wires and the construction wires. For example, the internal wires and the construction wires may be simply routed and may not be fixed to the frame 20, or may be fixed to the frame 20 with tape or metal fittings, or may be fixed to the frame 20 with a resin material such as an insulot. These wires may be tied together.

The LED lighting device 3 configured in this manner is stored in the recess 2a of the fixture body 2 and attached to the fixture body 2. Specifically, the LED lighting device 3 is attached to the fixture body 2 using the hook fitting 5 and elastic holding member 6 shown in Figures 3, 5, and 6. The hook fitting 5 and elastic holding member 6 are fixed to the frame 20.

As shown in FIG. 3, the hook fitting 5 is disposed on the ceiling side of the main plate portion 21 of the frame 20. The hook fitting 5 is a plate member made of sheet metal. The hook fitting 5 is fixed to the end of the main plate portion 21 of the frame 20. As an example, the hook fitting 5 is fixed to the main plate portion 21 of the frame 20 by a fixing member such as a screw, and extends so as to protrude outward from the main plate portion 21 of the frame 20. The hook fitting 5 is hooked to the fixture body 2. In this embodiment, a slit 2c (see FIG. 2) is provided on the inner wall surface of the recess 2a of the fixture body 2, and the hook fitting 5 is hooked to this slit 2c.

The elastic retaining member 6 is disposed on the ceiling side of the main plate portion 21 of the frame 20. The elastic retaining member 6 is, for example, a spring such as a kick spring. The elastic retaining member 6 is fixed to the end of the main plate portion 21 of the frame 20 on the ceiling side of the main plate portion 21. The elastic retaining member 6 is fixed to the opposite side of the hook metal fitting 5 in the width direction of the main plate portion 21 of the frame 20. The elastic retaining member 6 is fixed to the main plate portion 21 of the frame 20 by a fixing member such as a screw. Specifically, the elastic retaining member 6 is fixed to a retaining metal fitting 6c (see FIG. 6) fixed to the frame 20 by a mounting screw. The elastic retaining member 6 is detachably attached to the instrument body 2. In this embodiment, the elastic retaining member 6 is detachably engaged with a receiving metal fitting 7 fixed to the instrument body 2.

As shown in FIG. 2, the hook fittings 5 and the elastic retaining members 6 are provided in pairs at both ends of the frame 20 in the longitudinal direction, but this is not limited to this. Also, the hook fittings 5 and the elastic retaining members 6 are provided in positions facing each other in the short direction of the main plate portion 21 of the frame 20, but this is not limited to this.

Here, the method for attaching the LED lighting device 3 to the fixture body 2 will be described with reference to FIG. 9. FIG. 9 is a diagram for explaining the method for attaching the LED lighting device 3 to the fixture body 2 in the LED lighting fixture 1 according to the embodiment.

When attaching the LED lighting device 3 to the fixture body 2 installed on the ceiling 100, first, as shown in FIG. 9(a), the hook metal fitting 5 is hooked to the slit 2c (see FIG. 2) provided in the fixture body 2 to hang the LED lighting device 3 in a cantilever state, and one end of the elastic holding member 6, which is a kick spring, is engaged with the receiving metal fitting 7 fixed to the fixture body 2.

Next, as shown in FIG. 9(b), the hook 5 is pushed deep into the slit 2c while rotating the LED lighting device 3 around the hook 5 as a fulcrum, pushing the LED lighting device 3 up into the recess 2a of the fixture body 2.

Then, by rotating the LED lighting device 3 and pushing the LED lighting device 3 into the recess 2a of the fixture body 2, the LED lighting device 3 can be fitted into the recess 2a of the fixture body 2 as shown in FIG. 9(c). This allows the LED lighting device 3 to be attached to the fixture body 2.

When removing the LED lighting device 3 from the fixture body 2, the LED lighting device 3 can be removed from the fixture body 2 by performing the above-mentioned operations in reverse. For example, the LED lighting device 3 can be removed from the fixture body 2 by rotating it while pulling it down.

As described above, the LED lighting device 3 and the LED lighting fixture 1 according to this embodiment include at least a frame 20 and a cover member 30. The frame 20 has a first plate portion 22a and/or a second plate portion 22b located on both sides of the main plate portion 21 in the short direction of the frame 20 and located closer to the floor (first direction side) than the main plate portion 21. The cover member 30 has a main portion 31 having a surface facing the LED 12 and an extension portion 32 protruding from the inner surface of the main portion 31 toward the LED 12 side. The extension portion 32 has a first surface portion 32b1 and/or a second surface portion 32b2 as a surface portion that can abut against the first plate portion 22a and/or the second plate portion 22b of the frame 20.

In this manner, in the LED lighting device 3 according to this embodiment, the first plate portion 22a and/or the second plate portion 22b, which are the plate portions of the frame 20, and the first surface portion 32b1 and/or the second surface portion 32b2, which are the surfaces of the cover member 30, are configured to abut at a surface rather than at a point. This allows the frame 20 and the cover member 30 to be firmly fixed, thereby making it possible to obtain an LED lighting device 3 with high strength. Specifically, it is possible to ensure sufficient strength so that the LED lighting device 3 does not deform when the LED lighting device 3 is attached to or detached from the fixture body 2.

The LED lighting device 3 and LED lighting fixture 1 according to this embodiment include at least a frame 20 and a cover member 30, the frame 20 having a protruding portion 22 that protrudes toward the floor, and the cover member 30 having an extension portion 32 that extends toward the LED 12 from a position on the ceiling side (second direction side) of the portion of the protruding portion 22 on the inner surface of the main portion 31 that is located closest to the floor (first direction side) and covers at least a portion of the protruding portion 22.

If the protrusion 22 protruding toward the floor side is provided on the frame 20, the light of the LED 12 is less likely to reach the outer end 31a of the cover member 30, and the outer end 31a of the cover member 30 becomes darker than the central portion in the width direction (short direction) of the cover member 30. However, by forming the extension portion 32 as described above, a spatial area that extends toward the ceiling side outside the protrusion 22 of the frame 20 can be formed in the vicinity of the outer end 31a of the cover member 30, as shown in FIG. 10. As a result, even if the protrusion 22 protruding toward the floor side is provided on the frame 20, the light emitted from the LED 12 that does not pass through the main part 31 of the cover member 30 and is reflected on the inner surface of the main part 31 can be made to go around to the spatial area formed in the vicinity of the outer end 31a of the cover member 30. As a result, the light emitted from the LED 12 can be sufficiently transmitted to the outer end 31a of the main part 31 of the cover member 30, so that the vicinity of the outer end 31a of the main part 31 of the cover member 30 can be sufficiently illuminated. Therefore, the main part 31 of the cover member 30 can be illuminated throughout the entire width direction (X-axis direction), so that the ends of the cover member 30 in the width direction can be prevented from becoming dark. In other words, the darkness of the ends of the cover member 30 in the width direction due to the protrusions 22 of the frame 20 can be reduced.

In particular, in the LED lighting device 3 according to this embodiment, the surface of the extension portion 32 of the cover member 30 can abut against the plate portion provided on the protrusion 22 of the frame 20, so the frame 20 and the cover member 30 are firmly fixed together. Therefore, with the LED lighting device 3 according to this embodiment, it is possible to reduce the darkness of the outer end portion 31a of the cover member 30 while obtaining high strength.

The LED lighting device 3 and LED lighting fixture 1 according to this embodiment include at least a frame 20 and a cover member 30, and the extension portion 32 of the cover member 30 has an outer extension portion 32a and an inner extension portion 32b, and the outer extension portion 32a has a portion that overlaps with the gap G between the cover member 30 and the inner surface of the recess 2a of the fixture body 2 in the Z-axis direction.

This configuration allows the main part 31 of the cover member 30 to be sufficiently illuminated up to the vicinity of the outer end 31a. This allows the main part 31 of the cover member 30 to be illuminated throughout the entire width direction (X-axis direction). Therefore, since the main part 31 of the cover member 30 can be illuminated throughout the entire width direction (X-axis direction), it is possible to prevent the ends of the cover member 30 in the width direction from becoming dark.

In particular, the LED lighting device 3 in this embodiment is structured such that the ends of the cover member 30 in the width direction are likely to become dark due to the protrusion 22 on the frame 20 that protrudes toward the floor side, but by making the outer extension portion 32a of the extension portion 32 overlap the gap G, it is possible to effectively prevent the ends of the cover member 30 in the width direction from becoming dark.

Moreover, in the LED lighting device 3 according to this embodiment, as described above, a spatial area is formed near the outer end 31a of the cover member 30, extending outward from the protruding portion 22 of the frame 20 toward the ceiling. This allows the light emitted from the LED 12 to be guided around this spatial area. This further prevents the outer end 31a of the main portion 31 of the cover member 30 from appearing dark.

(Modification)
Modified examples of the LED lighting device and the LED lighting fixture will be described below with reference to the drawings. These modified examples can also provide the same effects as the above-described embodiment. The following modified examples will be described with a focus on the differences from the above-described embodiment.

(Variation 1)
FIG. 11A is a cross-sectional view of an LED illumination device 3A according to the first modification.

In the LED lighting device 3 in the above embodiment, the cover member 30 is made of one type of resin material, but in the LED lighting device 3A according to this modification, the cover member 30A is made of two or more types of materials. Specifically, the cover member 30A is made of two types of materials. In this modification, at least a part of the extension portion 32A of the cover member 30A is made of a material different from that of the main portion 31.

As shown in FIG. 11A, in the LED lighting device 3A according to this modified example, the main portion 31, the mounting portion 33, and the extension portion 32A are made of different resin materials. Specifically, the main portion 31, the mounting portion 33, the outer extension portion 32a of the extension portion 32A, the second surface portion 32b2 of the inner extension portion 32b of the extension portion 32A, and the first surface portion 32b1 of the inner extension portion 32b of the extension portion 32A are made of different resin materials.

In this case, for example, the main portion 31, the attachment portion 33, the outer extension portion 32a of the extension portion 32A, and the second surface portion 32b2 of the inner extension portion 32b of the extension portion 32A can be made of a translucent resin material, and the first surface portion 32b1 of the inner extension portion 32b of the extension portion 32A can be made of a white or milky white resin material. Such a cover member 30 can be formed by two-color molding.

In this way, by forming at least a part of the inner extension portion 32b of the extension portion 32A from a white or milky resin material, the inner extension portion 32b can be given a reflective function. As a result, the light emitted from the LED 12 that reaches the inner extension portion 32b of the extension portion 32A can be reflected by the inner extension portion 32b and can be made to enter the main portion 31. In this case, as in this modified example, by inclining the first surface portion 32b1 of the inner extension portion 32b obliquely toward the ceiling side, the light of the LED 12 can be concentrated in the vertical direction and the light extraction efficiency of the LED lighting device 3A can be improved. In this way, by giving the inner extension portion 32b a reflective function, the direct illuminance of the LED lighting device can be improved, and the number of LED lighting devices 1 installed can be reduced.

By making the reflectance of the extension portion 32A higher than that of the main portion 31, the light extraction efficiency can be improved as described above, but the reflectance of the extension portion 32A may also be higher than that of the frame 20. This improves the light extraction efficiency and makes the frame 20 paint-free. In other words, there is no need to apply a reflective coating to the frame 20. The reflectance of the extension portion 32A may also be higher than that of the substrate 11. This improves the light extraction efficiency and makes the substrate 11 resist-free. In other words, there is no need to form a white resist for reflective purposes on the surface of the substrate 11.

11A, the boundary of the two-color molding in the cover member 30A is the connection between the first surface portion 32b1 and the second surface portion 32b2 in the inner extension portion 32b of the extension portion 32A, but is not limited thereto. For example, as shown in Figs. 11B and 11C, the boundary of the two-color molding in the cover member 30A may be the middle of the first surface portion 32b1 in the inner extension portion 32b of the extension portion 32A (for example, the portion facing the vertical plate portion 11c of the protrusion 22 or the tip portion of the first surface portion 32b1). Also, as shown in Figs. 11D and 11E, the boundary of the two-color molding in the cover member 30A may be the connection between the outer extension portion 32a and the inner extension portion 32b in the extension portion 32A. In this case, as shown in FIG. 11D, the attachment portion 33 may remain translucent and be integrated with the outer extension portion 32a of the extension portion 32A, or as shown in FIG. 11E, the attachment portion 33 may be white or milky white and be integrated with the inner extension portion 32b of the extension portion 32A. Also, as shown in FIG. 11F, the boundary of the two-color molding in the cover member 30A may be the connection portion between the main portion 31 and the extension portion 32A. In this case, it is preferable to color the entire outer extension portion 32a and inner extension portion 32b of the extension portion 32A, as well as the attachment portion 33, white or milky white.

In addition, in Figures 11A to 11F, different resin materials may be formed in layers by two-color molding. For example, the extension portion 32A of the cover member 30A may have a laminated structure of a first layer on the ceiling side and a second layer on the floor side, and the first layer and the second layer may be formed by two-color molding. In other words, the extension portion 32A may be two-color and two-layered, and the cover member 30A may be formed by extrusion molding (two-layer extrusion).

(Variation 2)
FIG. 12A is a cross-sectional view of an LED illumination device 3B according to the second modification.

In the LED lighting device 3 in the above embodiment, the tip of the extension portion 32 of the cover member 30 abuts against the substrate 11, but as shown in FIG. 12A, in the LED lighting device 3B in this modified example, the tip of the extension portion 32B of the cover member 30B abuts against the frame 20. Specifically, the tip of the extension portion 32B abuts against the main plate portion 21 of the frame 20.

This configuration improves the strength of the LED lighting device 3B and also prevents insects from entering the interior of the cover member 30B.

In addition, in FIG. 12A, the base portion of the inner extension portion 32b of the extension portion 32B in the cover member 30B is connected to the connecting portion between the outer extension portion 32a and the mounting portion 33, but this is not limited thereto.

For example, as shown in FIG. 12B, the base portion of the inner extension portion 32b of the extension portion 32B in the cover member 30B may be connected to a part other than the end of the attachment portion 33, rather than to the end of the attachment portion 33. In other words, the inner extension portion 32b of the extension portion 32B may extend from the middle of the attachment portion 33.

Also, as shown in FIG. 12C, the base portion of the inner extension portion 32b of the extension portion 32B in the cover member 30B may be connected to a part other than the end of the outer extension portion 32a, rather than to the end of the outer extension portion 32a. In other words, the inner extension portion 32b of the extension portion 32B may extend from the middle of the outer extension portion 32a.

Also, as shown in FIG. 12D, the root portion of the inner extension portion 32b of the extension portion 32B in the cover member 30B may be connected to the main portion 31, rather than to the outer extension portion 32a or the attachment portion 33. In other words, the inner extension portion 32b of the extension portion 32B may extend from the inner surface of the main portion 31. In this case, as shown in FIG. 12D, the extension portion 32B may be composed only of the inner extension portion 32b, without having the outer extension portion 32a.

Note that Figures 12A to 12C may be applied to the above embodiment and other modified examples.

(Variation 3)
FIG. 13 is a cross-sectional view of an LED illumination device 3C according to the third modification.

In the LED lighting device 3 in the above embodiment, the second plate portion 22b of the protruding portion 22 of the frame 20 was inclined, but as shown in FIG. 13, in the LED lighting device 3C according to this modification, the second plate portion 22b of the protruding portion 22C of the frame 20C is formed parallel to the main plate portion 21, similar to the first plate portion 22a. However, in the protruding portion 22C, the first plate portion 22a and the second plate portion 22b are located at different height positions, and the protruding portion 22C is formed in a stepped shape. The second plate portion 22b of the protruding portion 22C is located closer to the floor than the main plate portion 21.

In addition, in the LED lighting device 3 in the above embodiment, the tip of the extension portion 32 of the cover member 30 abuts against the substrate 11, but as shown in FIG. 13, in the LED lighting device 3C in this modified example, the tip of the extension portion 32C of the cover member 30C does not abut against the substrate 11, and a gap exists between the tip of the extension portion 32C and the substrate 11. In other words, the extension portion 32C is formed so that its tip is spaced apart from the substrate 11.

With this configuration, when the substrate 11 is fixed to the frame 20C with adhesive or the like, even if the adhesive comes off, the substrate 11 is supported by the extension portion 32C, so that the substrate 11 can be prevented from falling. In addition, when the extension portion 32C is provided with a reflective function, the light extraction efficiency can be further improved. In addition, by separating the extension portion 32C from the substrate 11, it is possible to eliminate abnormal noise caused by contact between the extension portion 32C and the substrate 11.

(Variation 4)
FIG. 14 is a cross-sectional view of an LED illumination device 3D according to the fourth modification.

In the LED lighting device 3 in the above embodiment, the tip of the extension portion 32 of the cover member 30 abuts against the substrate 11, but as shown in FIG. 14, in the LED lighting device 3D in this modified example, the tip of the extension portion 32D of the cover member 30D abuts against the frame 20D. Specifically, the tip of the extension portion 32D abuts against the main plate portion 21 of the frame 20D. In addition, in the cover member 30D in this modified example, an extension portion 33b is provided on the mounting portion 33D. The extension portion 33b extends from near the end of the side plate portion 23 of the frame 20D toward the ceiling.

This configuration improves the strength of the cover member 30D, thereby further improving the strength of the LED lighting device 3D.

In the LED lighting device 3 in the above embodiment, the protruding portion 22 of the frame 20 has the first plate portion 22a which is a parallel plate portion and the second plate portion 22b which is an inclined plate portion, but this is not limited to this. As in the LED lighting device 3D shown in FIG. 14, the protruding portion 22D of the frame 20D may have only the inclined plate portion of the parallel plate portion and the inclined plate portion.

(Variation 5)
15A and 15B are cross-sectional views of an LED illumination device 3E according to Modification 5. Fig. 15A shows a cross section obtained by cutting a portion in which a power supply device 4 is not present, and Fig. 15B shows a cross section obtained by cutting a portion in which a power supply device 4 is present.

As shown in Figures 15A and 15B, the LED lighting device 3E according to this modification is configured such that a convex portion 34 and a protrusion 35 are formed on the extension portion 32 of the cover member 30E in the LED lighting device 3 according to the above embodiment.

The protrusion 34 protrudes from the extension portion 32 toward the frame 20, and functions as a restricting portion that restricts the movement of the frame 20. In this modified example, the protrusion 34 is formed at a position where it can abut against the side surface of the third plate portion 22c of the protruding portion 22 of the frame 20. As an example, the protrusion 34 is flat and formed to extend in the longitudinal direction of the cover member 30E. Also, in this modified example, the protrusion 34 is formed parallel to the third plate portion 22c.

By providing the protrusion 34 on the cover member 30E in this way, when the cover member 30E or the frame 20 tries to move, the protrusion 34 abuts against the protrusion 22, so that the movement of the cover member 30E or the frame 20 can be suppressed. For example, when the LED lighting device 3E is attached to the fixture body 2 (not shown), stress may be applied to the cover member 30E, causing the cover member 30E to be pushed apart. However, by providing the protrusion 34, when the cover member 30E is spread apart, the protrusion 34 abuts against the protrusion 22 of the frame 20. This makes it difficult for the cover member 30E to come off the frame 20, even if the cover member 30E and the frame 20 are not fixed with screws. In addition, by providing the protrusion 34, the frame 20 and the cover member 30E can be aligned when assembling the LED lighting device 3E.

The convex portion 34 and the protruding portion 22 may or may not be in contact with each other. In other words, there may be a gap between the convex portion 34 and the protruding portion 22. In this case, it is preferable that the gap between the convex portion 34 and the protruding portion 22 is smaller than the gap between the side plate portion 23 of the frame 20 and the mounting portion 33 of the cover member 30E. This makes it even more difficult for the cover member 30E to come off the frame 20.

The protrusion 35 is formed at a position on the extension portion 32 where it can come into contact with the frame 20. Specifically, the protrusion 35 is formed on the surface of the inner extension portion 32b of the extension portion 32. The protrusion 35 is also formed at a position where it can come into contact with the surface of the first plate portion 22a of the protruding portion 22 of the frame 20. As an example, the protrusion 35 is formed as a ridge extending in the longitudinal direction of the cover member 30E.

Providing the protrusion 35 in this manner makes it possible to reduce abnormal noise caused by repeated contact and separation between the frame 20 and the cover member 30E due to vibration, etc. In this modified example, the top of the protrusion 35 abuts against the surface of the first plate portion 22a of the protruding portion 22. The protrusion 35 for reducing abnormal noise may be formed on the first plate portion 22a of the protruding portion 22 of the frame 20, rather than on the extension portion 32. The protrusion 35 may be formed on one or both of the frame 20 and the cover member 30E.

In addition, in the LED lighting device 3E of this modified example, the cover member 30E further has a protrusion 36. The protrusion 36 is formed on the ceiling side surface of the outer extension portion 32a of the extension portion 32. As a result, when the LED lighting device 3E is stored in the recess 2a of the fixture body 2 (not shown), the protrusion 36 comes into contact with the opening edge 2a1 of the recess 2a, thereby reducing abnormal noise generated between the cover member 30E and the fixture body 2 due to vibrations, etc.

The protrusions 35 and 36 for reducing abnormal noise may be formed in other places on the cover member 30E. For example, they may be formed in the contact portion (attachment portion 33, etc.) of the cover member 30E with the side plate portion 23 of the frame 20 or in the contact portion (attachment portion 33, etc.) of the cover member 30E with the inner wall surface of the recess 2a of the instrument body 2. The protrusions 35 and 36 do not have to be formed over the entire length of the cover member 30E in the longitudinal direction. For example, the protrusions 35 and 36 may be formed intermittently in a plurality of places along the longitudinal direction of the cover member 30E. The protrusions 35 and 36 and the contact surface with which the protrusions 35 and 36 can come into contact may be surface contact, line contact, or point contact. In this case, the effect of reducing abnormal noise is highest in the case of point contact, followed by line contact, and then surface contact.

As shown in FIG. 15A, the LED lighting device 3E according to this modified example further includes a metal fitting 60. The metal fitting 60 is disposed on the ceiling side of the frame 20. The metal fitting 60 has a recess that covers the mounting portion 33 of the cover member 30E. This configuration makes it possible to prevent the cover member 30E from coming off. The metal fitting 60 may be attached to the mounting portion 33 of the cover member 30E by crimping, or may be attached to the frame 20 by screws, for example.

Note that, although the convex portion 34 of the cover member 30E in FIG. 15A is formed parallel to the third plate portion 22c of the protruding portion 22, this is not limited thereto.

For example, as in the LED lighting device 3F shown in FIG. 16, the convex portion 34F of the cover member 30F may be formed so as to be inclined with respect to the third plate portion 22c of the protrusion 22. In FIG. 16, the convex portion 34F is formed so as to be inclined toward the substrate 11 side. This makes it easier to fit the cover member 30F and the frame 20 together compared to the case of FIG. 15.

In this case, as in the LED lighting device 3G shown in FIG. 17, the convex portion 34G of the cover member 30G may be formed to have a vertical portion and an inclined portion. This allows the cover member 30G to be easily fitted into the frame 20, and also makes it difficult for the cover member 30G to come off the frame 20.

Also, as in the LED lighting device 3H shown in FIG. 18, the convex portion 34H of the cover member 30H may be formed so as to be inclined toward the third plate portion 22c of the protruding portion 22C of the frame 20C. This makes it even more difficult for the cover member 30H to come off the frame 20.

In this case, as in the LED lighting device 3I shown in FIG. 19, the convex portion 34I of the cover member 30I may be formed so as to be inclined toward the third plate portion 22c of the protruding portion 22C of the frame 20C and bent to have two inclined portions. This makes it difficult for the cover member 30I to come off the frame 20, and allows the cover member 30I and the frame 20 to be easily fitted together.

Also, as in the LED lighting device 3J shown in FIG. 20, the convex portion 34J of the cover member 30J may be formed to have a vertical portion and an inclined portion. Specifically, the convex portion 34J is formed to be bent so as to fold back toward the third plate portion 22c of the protrusion 22C. This makes it difficult for the cover member 30J to come off the frame 20, and allows the cover member 30J and the frame 20 to be easily fitted together.

(Variation 6)
FIG. 21A is a cross-sectional view of an LED illumination device 3K according to the sixth modification.

In the LED lighting device 3 in the above embodiment, the extension portion 32 of the cover member 30 extends beyond the protrusion portion 22 of the frame 20 to a position where it overlaps with the substrate 11 and the main plate portion 21 of the frame 20, but this is not limited to the above.

For example, as in the LED lighting device 3K shown in FIG. 21, the extension portion 32K of the cover member 30K may be formed so as to extend only up to the position of the protrusion 22 of the frame 20.

21A, the end face of the tip of the extension portion 32K of the cover member 30K is not in contact with the main portion 21 of the frame 20, but this is not limited to the above. For example, as shown in FIG. 21B, the end face of the tip of the extension portion 32K of the cover member 30K may be in contact with the main portion 21 of the frame 20. This makes it difficult for the cover member 30K to come off. In addition, in the case of Figures 12A to 12D, there is a boundary between the double cover portion of the extension portion 32K and the main portion 31 of the cover member 30K (an area where insects are not noticeable even if they enter the cover member 30K through a gap and accumulate inside) and the single cover portion of the cover member 30K with only the main portion 31 (an area where insects are noticeable if they enter the cover member 30K and accumulate inside), so it was difficult to attach the mounting structure near the boundary, but by making it as shown in Figure 21B, the area where the board 11 can be placed in the main portion 21 of the frame 20 (board mounting portion) can be made wider compared to the case of Figures 12A to 12D, so it is easier to attach the mounting structure for the power supply unit 4 and metal fittings.

In addition, in FIG. 12B, the side of the tip of the extension portion 32K of the cover member 30K is in contact with the protrusion portion 22 of the frame 20, but this is not limited thereto. Specifically, as shown in FIG. 21C, the side of the tip of the extension portion 32K of the cover member 30K does not have to be in contact with the protrusion portion 22 of the frame 20. In other words, there may be a slight gap (space) between the side of the tip of the extension portion 32K of the cover member 30K and the protrusion portion 22 of the frame 20. This makes it easier to fit the cover member 30K into the frame 20.

(Variation 7)
FIG. 22 is a cross-sectional view of an LED illumination device 3L according to the seventh modification.

In the LED lighting device 3 in the above embodiment, the extension portion 32 of the cover member 30 extends toward the substrate 11 and the LEDs 12 at an angle relative to the substrate 11, but this is not limited to the above.

For example, as in the LED lighting device 3L shown in FIG. 22, the extension portion 32L of the cover member 30L may extend parallel to the substrate 11 toward the LED 12.

(Variation 8)
FIG. 23 is a cross-sectional view of an LED illumination device 3M according to the eighth modification.

In the LED lighting device 3 in the above embodiment, the extension portion 32 of the cover member 30 extends from the outer end portion 31a of the main portion 31 toward the LED 12, but this is not limited to the above.

For example, as in the LED lighting device 3M shown in FIG. 23, the extension portion 32M of the cover member 30M may extend from a position away from the outer end portion 31a of the main portion 31 toward the LED 12.

(Modification 9)
FIG. 24 is a cross-sectional view of an LED illumination device 3N according to the ninth modification.

In the LED lighting device 3 in the above embodiment, the extension portion 32 of the cover member 30 is formed along the protrusion 22 in a shape that matches the shape of the protrusion 22 of the frame 20, but this is not limited to the above.

For example, as in the LED lighting device 3N shown in FIG. 24, the extension 32N of the cover member 30N may be formed along the protrusion 22C in a shape that does not match the shape of the protrusion 22C of the frame 20C. In other words, the cover member 30N and the frame 20C may have portions where the extension 32N and the protrusion 22C are not formed parallel to each other.

(Variation 10)
FIG. 25 is a cross-sectional view of an LED illumination device 3O according to the tenth modification.

In the LED lighting device 3 in the above embodiment, the protruding portion 22 of the frame 20 is shaped so that the second plate portion 22b is located outside the first plate portion 22a. However, as shown in FIG. 25, in the LED lighting device 3O in this modified example, the protruding portion 22O of the frame 20O is shaped so that the second plate portion 22b is located inside the first plate portion 22a. Note that the protruding portion 22O in this modified example does not have the third plate portion 22c, which is a vertical plate portion.

In addition, in the LED lighting device 3O in this modified example, as in modified example 8 above, the extension portion 32O of the cover member 30O is not connected to the outer end portion 31a of the main portion 31, but extends from a position away from the outer end portion 31a of the main portion 31 toward the LED 12. In addition, the extension portion 32O in this modified example has a convex portion 34 and a protrusion 35, as in modified example 5 above.

In FIG. 25, the convex portion 34 is inclined so as to incline toward the substrate 11, but this is not limited thereto. For example, as in the LED lighting device 3P shown in FIG. 26, the convex portion 34P provided on the extension portion 32O of the cover member 30P may be inclined so as to incline toward the protrusion 22O.

(Modification 11)
FIG. 27 is a cross-sectional view of an LED illumination device 3Q according to the eleventh modification.

In the LED lighting device 3 in the above embodiment, the first plate portion 22a in the protruding portion 22 of the frame 20 is a parallel plate portion parallel to the substrate 11 and the main plate portion 21, but this is not limited to this.

For example, as in the LED lighting device 3Q shown in FIG. 27, the first plate portion 22a in the protruding portion 22Q of the frame 20Q may be an inclined plate portion that is inclined with respect to the substrate 11 and the main plate portion 21. Specifically, the protruding portion 22Q is formed so as to bend at the first plate portion 22a and the second plate portion 22b. Note that the protruding portion 22Q of this modified example does not have the third plate portion 22c, which is a vertical plate portion.

(Variation 12)
FIG. 28 is a cross-sectional view of an LED illumination device 3R according to the twelfth modification.

In the LED lighting device 3 in the above embodiment, the protruding portion 22 of the frame 20 is composed only of a flat plate portion, but this is not limited to this.

For example, as in the LED lighting device 3R shown in FIG. 28, the protruding portion 22R of the frame 20R may be configured as a curved plate portion that is curved in an arc shape. In other words, the plate portion that configures the protruding portion 22R is not limited to being a flat plate, and may also be a curved plate.

Also, as shown in FIG. 28, the extension 32R of the cover member 30R may be shaped to fit the curved protrusion 22R. Specifically, the extension 32R may be shaped to fit into the curved shape of the protrusion 22R. In this way, the shape of the surface of the extension 32R that can come into contact with the plate portion of the protrusion 22R is not limited to a flat surface, but may also be a curved surface.

(Variation 13)
FIG. 29 is a cross-sectional view of an LED lighting fixture 1S and an LED lighting device 3S according to the thirteenth modification.

In the LED lighting device 1S according to this modified example, a through hole 2d is provided in the inner wall surface of the recess 2a of the device body 2.

In addition, in the LED lighting device 3S according to this modified example, a through hole 24 is provided in the protruding portion 22 of the frame 20S. Specifically, the through hole 24 is provided in the third plate portion 22c that constitutes the side wall of the protruding portion 22 on the LED 12 side. The extension portion 32S of the cover member 30S extends only up to the position of the upper surface of the protruding portion 22 of the frame 20S. In other words, the extension portion 32S does not cover the third plate portion 22c of the protruding portion 22.

With this configuration, the spatial area surrounded by the cover member 30S and the frame 20S and the spatial area S on the ceiling side of the frame 20S in the recess 2a are in communication with each other via the through holes 24. In addition, the internal space (spatial area S) of the recess 2a is in communication with the external space of the recess 2a via the through holes 2d. This allows the heat generated by the LEDs 12 to be effectively dissipated by natural convection via the through holes 24 and 2d. This makes it possible to prevent heat from building up in the spatial area surrounded by the cover member 30S and the frame 20S.

(Other Modifications)
While the LED lighting fixture and LED lighting device according to the present invention have been described above based on the embodiment and modifications, the present invention is not limited to these embodiment and modifications.

In the above embodiment and modified examples, frames of various shapes have been exemplified as frames used in LED lighting devices, but frames of the shapes described below may also be used. Note that some of the frames described below have the shapes already described above. For convenience, the frames described below use the same reference numerals as in the above embodiment, even though they have different shapes. The frame features described below may be mutually applicable, or may be applied to the above embodiment and modified examples.

First, regarding the length of the side plate portion 23, a frame of any length can be used. Specifically, as shown in FIG. 30, a frame 201 may be used in which the tip of the side plate portion 23 is positioned closer to the ceiling than the main plate portion 21, as shown in FIG. 31, a frame 202 may be used in which the tip of the side plate portion 23 is positioned at the position of the main plate portion 21, or an I-shaped frame 203 in which no side plate portion 23 is formed may be used as shown in FIG. 32. Note that the longer the side plate portion 23 is, the stronger the frame can be.

Furthermore, the shape of the protrusion 22 of the frame 20 can be any shape.

For example, as shown in FIG. 33, a frame 204 having a protruding portion 22 with an inclined plate portion inclined toward the outside may be used, as shown in FIG. 34, a frame 205 having a protruding portion 22 with an inclined plate portion inclined toward the inside may be used, as shown in FIG. 35, a frame 206 having a protruding portion 22 with a V-shaped (triangular) cross section having an inclined plate portion inclined toward the outside and an inclined plate portion inclined toward the outside may be used, or as shown in FIG. 36, a frame 207 having a protruding portion 22 with an inclined plate portion inclined toward the outside, an inclined plate portion inclined toward the outside, and a vertical plate portion may be used.

As shown in FIG. 37, a frame 208 having a protruding portion 22 formed of a curved plate portion may be used, as shown in FIG. 38, a frame 209 having a protruding portion 22 with an inclined plate portion on the inside may be used, as shown in FIG. 39, a frame 210 having a protruding portion 22 with an inclined plate portion on the outside may be used, or as shown in FIG. 40, a frame 211 having a protruding portion 22 with inclined plate portions on both the outside and inside may be used.

As shown in Figs. 41 to 43, frames 212, 213, and 214 may be used that have protruding portions 22 that do not have inclined plate portions. The protruding portions 22 of the frames 212, 213, and 214 shown in Figs. 41 to 43 are all formed in a stepped shape. Note that the frame 212 shown in Fig. 41 is formed so that the tip of the side plate portion 23 is located closer to the ceiling than the main plate portion 21, the frame 213 shown in Fig. 42 is formed so that the tip of the side plate portion 23 is located at the position of the main plate portion 21, and the frame 214 shown in Fig. 43 has a shape in which the side plate portion 23 is not formed.

In this case, the frames 215 to 221 shown in Figs. 44 to 50 can be used as frames having stepped protrusions 22. Specifically, the protrusions 22 of the frame 215 shown in Fig. 44 have a parallel plate portion at the same height as the main plate portion 21 and a parallel plate portion at a different height from the main plate portion 21. The protrusions 22 of the frame 216 shown in Fig. 45 have two parallel plate portions at different heights from the main plate portion 21. The protrusions 22 of the frame 217 shown in Fig. 46 have a parallel plate portion and an inclined plate portion located inside the parallel plate portion. The protrusions 22 of the frame 218 shown in Fig. 47 have a parallel plate portion and an inclined plate portion located outside the parallel plate portion and inclined inward. The protrusions 22 of the frame 219 shown in Fig. 48 have an inclined plate portion inclined outward and an inclined plate portion inclined inward. The protrusion 22 of the frame 220 shown in FIG. 49 has a parallel plate portion and a pair of inclined plate portions located on either side of the parallel plate portion. The protrusion 22 of the frame 221 shown in FIG. 50 has two parallel plate portions at different heights and an inclined plate portion located inside the parallel plate portions.

As in the frame 222 shown in FIG. 51, a reinforcing rib 21b may be formed at the boundary between the main plate 21 and the protruding portion 22, or as in the frame 223 shown in FIG. 52, reinforcing ribs (reinforcing beads) 21c and 21d may be formed on both sides of the main plate 21 even if the protruding portion 22 is not formed. This ensures the strength of the frame even in a low frame where the side plate 23 is short or not formed, or where the protruding portion 22 is not formed. The reinforcing ribs 21b, 21c, and 21d can be formed by pressing.

In addition, in the above-mentioned embodiment, the outer extension 32a may be part of the main portion 31. In this case, the extension 32 may be, for example, only the inner extension 32b, which extends from the outer extension 32a, which is part of the main portion 31, toward the inside of the cover member 30.

In the above embodiment, the LED lighting device 3 is attached to the fixture body 2 by rotating the LED lighting device 3, but this is not limited to the above. In other words, the LED lighting device 3 may be attached to the fixture body 2 without rotating the LED lighting device 3. Specifically, the LED lighting device 3 may be attached to the fixture body 2 by hooking a leaf spring or the like provided on the LED lighting device 3 onto the fixture body 2 installed on the ceiling and moving the LED lighting device 3 vertically so as to move it in parallel toward the fixture body 2. In this case, the LED lighting device 3 can be attached to the fixture body 2 by pushing and fitting the LED lighting device 3 vertically into the recess 2a of the fixture body 2.

In the above embodiment, the LED 12 is an SMD type LED element in which an LED chip is mounted in a package, and the light emitting module consisting of the substrate 11 and the LED 12 is an SMD type LED module, but this is not limited to this. For example, the light emitting module consisting of the substrate 11 and the LED 12 may be a COB (chip on board) type LED module. In this case, the LED 12 may be an LED chip (bare chip) itself, and multiple LEDs 12 (LED chips) may be arranged in a line on the substrate 11, and the multiple LEDs 12 may be sealed together or individually with a sealing member (e.g., phosphor-containing resin).

In addition, in the above embodiment, a cover member 30 having both diffusive and translucent properties is used, but this is not limited to the above. For example, a translucent cover having only translucent properties out of the diffusive and translucent properties may be used instead of the cover member 30. In this case, a transparent cover with a high transmittance that allows the other side to be seen through may be used as the translucent cover.

In addition, the present invention also includes forms obtained by applying various modifications conceived by a person skilled in the art to the above-mentioned embodiments and modifications, and forms realized by arbitrarily combining the components and functions in the embodiments and modifications without departing from the spirit of the present invention. In addition, the present invention also includes any combination of one or more components in each of the multiple claims described in the claims at the time of filing of this application. In addition, when a cited-form claim described in the claims at the time of filing of this application is made into a multiple claim or multiple-multi claim so as to cite any multiple claims, the present invention also includes inventions of combinations of all claims included in the multiple claim or multiple-multi claim.

REFERENCE SIGNS LIST 1, 1S LED lighting fixture 2 Fixture body 2a Recess 2a1 Opening edge 3, 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3H, 3I, 3J, 3K, 3L, 3M, 3N, 3O, 3P, 3Q, 3R, 3S LED lighting device 11 Substrate 12 LED
20, 20C, 20D, 20O, 20Q, 20R, 20S, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 Frame 21 Main plate portion 22, 22C, 22D, 22O, 22Q, 22R Protruding portion 30, 30A, 30B, 30C, 30D, 30E, 30F, 30G, 30H, 30I, 30J, 30K, 30L, 30M, 30N, 30O, 30P, 30R, 30S Cover member 31 Main portion 31a Outer end portion 32, 32A, 32B, 32C, 32D, 32K, 32L, 32M, 32N, 32O, 32R, 32S: extension portion 32a: outer extension portion

Claims (14)

A substrate on which an LED is arranged;
a long frame having a main plate portion to which the substrate is attached;
a cover member attached to the frame so as to cover the LED;
When a direction of the light emission side of the LED based on the main plate portion is defined as a first direction and a direction opposite to the first direction is defined as a second direction,
the frame has protruding portions located on both sides of the main plate portion in a short-side direction of the frame and protruding from the main plate portion toward the first direction side, and side plate portions located outside the protruding portions in the short-side direction of the frame and extending toward the second direction side,
The protrusion has an inclined plate portion inclined with respect to the main plate portion, and a parallel plate portion located closer to the LED than the inclined plate portion and parallel to the main plate portion,
A tip end of the side plate portion, an end portion of the main plate portion, and an end portion of the inclined plate portion on the side plate portion side are provided in this order toward the first direction side.
LED lighting device. The cover member has a main portion that transmits light from the LED and irradiates the light to the outside, a pair of extension portions connected to the main portion, and a pair of mounting portions connected to the pair of extension portions,
The frame has a first protruding portion and a second protruding portion as the protruding portion,
one of the pair of extension portions extends toward the LED from a position on the second direction side of a portion of the first protrusion on an inner surface of the main portion that is located furthest in the first direction, so as to cover at least a portion of the first protrusion,
the other of the pair of extension portions extends from a position on the inner surface of the main portion that is on the second direction side of a portion of the second protrusion that is located furthest on the first direction side toward the LED so as to cover at least a portion of the second protrusion,
Each of the pair of extension portions has a plate shape and includes an outer extension portion located outside the protrusion in a short side direction of the frame,
The cover member is attached to the side plate portion,
the main portion has an outer end portion located outside the protruding portion in a short side direction of the frame,
The outer extension portion extends from the outer end portion.
2. The LED lighting device according to claim 1. The LED lighting device is accommodated in a recess of a fixture body,
The pair of mounting portions extend in the second direction,
Each of the pair of extension portions further includes an inner extension portion extending from the outer extension portion toward the LED side so as to cover at least a portion of the protrusion,
The mounting portion is attached to the side plate portion,
The main plate portion is located on the second direction side relative to an opening edge of the recess,
At least a portion of the protrusion is located on the first direction side relative to an opening edge of the recess.
3. The LED lighting device according to claim 2. Each of the pair of extension portions extends such that a tip thereof faces the second direction side.
3. The LED lighting device according to claim 2. Each tip of the pair of extension portions is in contact with the main plate portion.
3. The LED lighting device according to claim 2. A tip of each of the pair of extension portions is in contact with the substrate.
3. The LED lighting device according to claim 2. A gap exists between the tips of the pair of extension portions and the substrate.
3. The LED lighting device according to claim 2. At least a portion of each of the pair of extension portions has a shape that follows a portion of the frame.
3. The LED lighting device according to claim 2. At least a portion of each of the pair of extension portions is in contact with the frame.
3. The LED lighting device according to claim 2. At least a portion of at least one of the pair of extension portions has a shape that conforms to the protrusion portion.
3. The LED lighting device according to claim 2. At least a portion of at least one of the pair of extension portions is in contact with the protrusion.
3. The LED lighting device according to claim 2. At least one tip of the pair of extension portions is located closer to the center of the frame than the protruding portion.
3. The LED lighting device according to claim 2. A tip of the side plate portion is located on the second direction side of the main plate portion.
2. The LED lighting device according to claim 1. An LED lighting device according to any one of claims 1 to 13;
and a fixture body having a recess in which the LED lighting device is housed.
LED lighting fixture.

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