JP2024063372A - LED lighting device and LED lighting fixture - Google Patents

Abstract

[Problem] To provide an LED lighting device or the like that can make the frame thinner while ensuring the strength of the frame. [Solution] The LED lighting device 3 includes a board 11 on which LEDs 12 are arranged, a long, plate-like frame 20 to which the board 11 is attached, and a cover member 30 attached to the frame 20. The frame 20 has a recess 20a in which the board 11 is arranged, a pair of horizontal plate parts 23 located on both sides of the recess 20a in the short direction of the frame 20, and a pair of side plate parts 24 (extension parts) extending in a second direction from the pair of horizontal plate parts 23, the end of the LED 12 on the first direction side (the direction of the light emission side) is located on the second direction side (the opposite side to the light emission side) of the opening surface of the recess 20a, the tips of the pair of side plate parts 24 are located on the second direction side of the recess 20a, and b≦2×a is satisfied, where a is the depth of the recess 20a and b is the length of one of the pair of side plate parts 24. [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 LED lighting fixture that is installed on a ceiling is known to have 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 (Patent Document 1).

The LED lighting device (LED unit) in the LED lighting fixture disclosed in Patent Document 1 includes a long substrate, multiple LEDs mounted on the substrate, a long, translucent cover member that covers the multiple LEDs, and a long frame that supports the substrate and to which the cover member is attached.

In the LED lighting device disclosed in Patent Document 1, the cross-sectional shape of the frame is U-shaped. The frame with a U-shaped cross-sectional shape has, for example, a main plate portion to which a board on which LEDs are mounted is attached, and a pair of side plate portions extending from both ends of the main plate portion in the short direction (width direction) toward the ceiling.

JP 2017-103248 A

However, when the cross-sectional shape of the frame is U-shaped, as in the LED lighting device disclosed in Patent Document 1, the spatial area enclosed by the recess of the fixture body and the frame becomes narrow, making it difficult to arrange various components such as functional parts or electrical wires in this spatial area.

On the other hand, if the length (amount of protrusion from the main plate) of a pair of side plates of a U-shaped cross section frame is simply shortened to thin the frame in an attempt to widen the spatial area enclosed by the recess of the appliance body and the frame, the strength of the frame may be reduced. In particular, if the frame is made of sheet metal and is plate-shaped, shortening the length of a pair of side plates of a U-shaped cross section frame will significantly reduce the strength of the frame.

If the strength of the frame is reduced, the LED lighting device may deform when being attached to the fixture body, or may bend after installation due to pressure from its own weight or electric wires. This can result in a gap between the LED lighting device and the opening edge of the recess in the fixture body. As a result, the electric wires may protrude from the gap or become caught in the gap, causing wire jamming. Furthermore, if a gap occurs between the LED lighting device and the fixture body, the design of the lighting fixture is reduced.

The present invention was made in consideration of these problems, and aims to provide an LED lighting device that can reduce the thickness of a plate-shaped frame while maintaining the frame strength, 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, a long, plate-shaped frame 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 relative to the frame is defined as a first direction and the direction opposite to the first direction is defined as a second direction, the frame has a recess in which the substrate is arranged, a pair of plate parts located on both sides of the recess in the short direction of the frame and extending along the longitudinal direction of the frame, and a pair of extending parts extending from the pair of plate parts to the second direction side, the end of the LED on the first direction side is located on the second direction side of the opening surface of the recess, the tips of the pair of extending parts are located on the second direction side of the recess, and the relational expression b≦2×a is satisfied, where a is the depth of the recess and b is the length of one of the pair of extending parts.

Another aspect of the LED lighting fixture according to the present invention comprises the above-mentioned LED lighting device and a fixture body having a recess in which the LED lighting device is stored.

The frame can be made thinner while still maintaining its height.

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 the relationship between the shape of the protruding portion of the frame and the strength of the frame in an LED lighting device. FIG. 11 is a diagram showing a first example of the arrangement of construction wires in an LED lighting device according to an embodiment. FIG. 12 is a diagram showing a second example of the arrangement of the construction wires in the LED lighting device according to the embodiment. FIG. 13 is a diagram showing a third example of the arrangement of construction electric wires in an LED lighting device according to an embodiment. FIG. 14 is a diagram showing a first modified example of the LED illumination device according to the embodiment. FIG. 15 is a diagram showing a second modified example of the LED illumination device according to the embodiment. FIG. 16 is a diagram showing a third modified example of the LED illumination device according to the embodiment. FIG. 17 is a diagram showing a fourth modified example of the LED illumination device according to the embodiment. FIG. 18 is a diagram showing a fifth modified example of an LED illumination device according to an embodiment. FIG. 19 is a cross-sectional view showing a first modified example of the frame. FIG. 20 is a cross-sectional view showing a second modified example of the frame. FIG. 21 is a cross-sectional view showing a third modified example of the frame. FIG. 22 is a cross-sectional view showing a fourth modified example of the frame. FIG. 23 is a cross-sectional view showing a fifth modified example of the frame. FIG. 24 is a cross-sectional view showing a sixth modified example of the frame. FIG. 25 is a cross-sectional view showing a seventh modified example of the frame. FIG. 26 is a cross-sectional view showing an eighth modified example of the frame. FIG. 27 is a cross-sectional view showing a ninth modified example of the frame. FIG. 28 is a cross-sectional view showing a tenth modified example of the frame. FIG. 29 is a cross-sectional view showing an eleventh modified example of the frame. FIG. 30 is a cross-sectional view showing a twelfth modified example of the frame. FIG. 31 is a cross-sectional view showing a thirteenth modified example of the frame. FIG. 32 is a cross-sectional view showing a fourteenth modified example of the frame. FIG. 33 is a cross-sectional view showing a fifteenth 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 fixture 1 according to an embodiment will be described with reference to Figs. 1 to 4. Fig. 1 is a perspective view of the LED lighting fixture 1 according to an embodiment. Fig. 2 is an exploded perspective view of the LED lighting fixture 1. Figs. 3 and 4 are cross-sectional views of the LED lighting fixture 1. Figs. 3 and 4 show cross sections taken along a plane parallel to the short side direction of the LED lighting fixture 1. Note that Figs. 3 and 4 show different cross sections.

As shown in Figs. 1 to 4, the LED lighting fixture 1 according to this embodiment comprises a fixture body 2 and an LED lighting device 3 attached to the fixture body 2. The LED lighting fixture 1 is long. The total length of the LED lighting fixture 1 is, for example, 2 feet, 4 feet, or 8 feet.

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 device 4 is disposed on the rear side of the LED lighting device 3. Specifically, the power supply device 4 is disposed in the recess 2a of the fixture body 2. That is, the power supply device 4 is housed in the recess 2a of the fixture body 2. In this embodiment, the power supply device 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 device 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 device 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.

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 FIG. 3, the power supply unit 4 is fixed to the frame 20 by screwing a part of the circuit case 4c to the main plate portion 21 of the frame 20 with a screw 50. Specifically, the circuit case 4c is a housing having an opening, and is composed of a bottom plate and a side plate erected on the bottom plate. The circuit case 4c is arranged so that the opening of the circuit case 4c is located on the frame 20 side. That is, the part of the circuit case 4c on the frame 20 side is open.

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 plate-shaped. In this embodiment, 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 and/or press working 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 working, the thickness of the metal plate constituting the frame 20 is preferably 1 mm or less. Specifically, the thickness of the metal plate constituting the frame 20 is 0.5 mm. Note that the method of manufacturing the frame 20 is not limited to roll forming and press working, and may be aluminum extrusion molding, etc.

3 and 4, the plate-shaped frame 20 has a main plate portion 21, a pair of vertical plate portions 22, a pair of horizontal plate portions 23, and a pair of side plate portions 24. As shown in FIG. 8, the main plate portion 21, the pair of vertical plate portions 22, the pair of horizontal plate portions 23, and the pair of side plate portions 24 all extend along the longitudinal direction (Y-axis direction) of the frame 20. Also, as shown in FIG. 3 and 4, in this embodiment, the frame 20 is formed symmetrically in the XZ cross section with respect to the center of the frame 20 in the short side direction, but this is not limited to this.

The main board 21 is the main body of the frame 20. The main board 21 is a plate-like body with a constant thickness that is generally flat. As shown in FIG. 3, the light source 10 is disposed on the main board 21. Specifically, a board 11 on which LEDs 12 are disposed is placed on the main board 21. In other words, the main board 21 supports the board 11. The light source 10 disposed on the main board 21 is attached to the main board 21. Specifically, the board 11 of the light source 10 is attached to the main board 21. In this embodiment, the board 11 and the main board 21 are in contact with each other. The LEDs 12 of the light source 10 are disposed in the center of the main board 21 in the width direction, but this is not limited to this.

The main board portion 21 has a first surface which faces the substrate 11, and a second surface which faces 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.

As shown in FIG. 3, the main board 21 is located closer to the ceiling than the opening surface of the recess 2a of the fixture body 2 (i.e., the bottom surface side of the recess 2a). In this embodiment, the LED 12 is also located closer to the bottom surface side of the recess 2a than the opening surface of the recess 2a of the fixture body 2. Specifically, the main board 21 and the LED 12 are located closer to the ceiling than the opening edge 2a1 of the recess 2a. This allows the distance between the cover member 30 and the LED 12 to be increased, thereby suppressing uneven brightness (graininess) of the multiple LEDs 12 arranged in a straight line.

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 board 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 board 11 may be slid to engage with the claw 21a, or the board 11 may be crimped to engage with the claw 21a. The method of fixing the main plate 21 and the board 11 is not limited to the engagement structure using the claw 21a, and the main plate 21 and the board 11 may be bonded and fixed with an adhesive or adhesive tape. In addition, the main plate 21 and the board 11 are in contact with each other, but this is not limited thereto. For example, a separate member such as a heat conductive sheet may be inserted between the main plate 21 and the board 11. In addition, the main plate 21 has a through hole through which an electric wire is inserted to electrically connect the wiring of the board 11 to the power supply device 4.

The pair of standing plate portions 22 are standing plate portions that stand on the main plate portion 21. Specifically, the pair of standing plate portions 22 stand on one end of the main plate portion 21, and the other of the pair of standing plate portions 22 stands on the other end of the main plate portion 21. The standing plate portions 22 and the horizontal plate portion 23 are provided between the main plate portion 21 and the side plate portion 24. Each of the pair of standing plate portions 22 is flat.

As shown in FIG. 3, in this embodiment, the main surface of each of the pair of standing plate portions 22 is perpendicular to the main surface of the main plate portion 21, and extends in a direction perpendicular to the short side direction of the frame 20. Specifically, each of the pair of standing plate portions 22 extends along the Z-axis direction. Note that the standing plate portions 22 may be formed so as to be inclined with respect to the main plate portion 21.

As shown in Figures 3 and 4, the recess 20a is composed of a main plate portion 21 and a pair of standing plate portions 22. The bottom of the recess 20a is the main plate portion 21. Therefore, the board 11 on which the LEDs 12 are mounted is placed on the bottom (main plate portion 21) of the recess 20a. In this manner, the frame 20 has the recess 20a on which the board 11 is placed. In addition, the side of the recess 20a is the standing plate portion 22. In this embodiment, the cross-sectional shape of the recess 20a is U-shaped. In other words, the cross-sectional shape of the spatial region of the recess 20a (the region surrounded by the main plate portion 21 and the pair of standing plate portions 22) is rectangular.

The cross-sectional shape of the recess 20a does not have to be U-shaped. In other words, the cross-sectional shape of the spatial region of the recess 20a does not have to be rectangular. For example, the cross-sectional shape of the spatial region of the recess 20a may be trapezoidal. In this case, the main plate portion 21 corresponds to the lower or upper base of the trapezoidal recess 20a, and the upright portion 22 corresponds to the side of the trapezoidal recess 20a that is inclined relative to the main plate portion 21.

The light source unit 10 arranged at the bottom of the recess 20a is stored in the recess 20a. In this embodiment, the depth of the recess 20a is greater than the height (thickness) of the light source unit 10, and the light source unit 10 is stored so as not to protrude from the recess 20a. That is, the LED 12 is stored in the recess 20a. Therefore, the floor side end (light emitting surface) of the LED 12 of the light source unit 10 is located closer to the ceiling than the opening surface of the recess 20a. In this case, the floor side end of the LED 12 may be located at a position set back from the opening surface of the recess 20a, or may be flush with the opening surface of the recess 20a. In this way, by storing the LED 12 in the recess 20a, the distance between the LED 12 and the main part 31 of the cover member 30 can be increased, so that the brightness unevenness (graininess) of the multiple LEDs 12 arranged in the longitudinal direction of the frame 20 can be suppressed.

In this embodiment, the LEDs 12 of the light source unit 10 are housed in the recess 20a so as not to protrude from the recess 20a, but this is not limited to the above. For example, a part or all of the LEDs 12 may protrude from the recess 20a. Even in this case, the substrate 11 of the light source unit 10 should be arranged so as not to protrude from the recess 20a, and the depth of the recess 20a should be greater than the thickness of the substrate 11 of the light source unit 10.

Also, as shown in FIG. 4, if the depth of the recess 20a of the frame 20 is a and the width of the recess 20a is w1, it is preferable that the relationship formula w1 ≧ 10 × a is satisfied. In other words, the ratio of the depth a of the recess 20a to the width w1 of the recess 20a is 1:10 or more. This makes it possible to prevent the light emitted from the LED 12 from being blocked by hitting the corner of the opening surface of the recess 20a (the connection part between the vertical plate part 22 and the horizontal plate part 23) even if the light source part 10 is stored in the recess 20a. In other words, by making w1 ≧ 10 × a, it is possible to make it difficult for the light emitted from the LED 12 to be blocked. In this case, as shown in FIG. 4, if the width of the recess 20a is w1 and the width of the horizontal plate part 23 is w2, it is preferable that the relationship formula w1 > 2 × w2 is satisfied.

In this way, by forming the recess 20a in the frame 20, a pair of protrusions 20b are formed in the frame 20. In this embodiment, the recess 20a is formed so as to be recessed toward the ceiling side, so the pair of protrusions 20b are formed so as to protrude toward the floor side. Each of the pair of protrusions 20b is composed of a horizontal plate portion 23 and a standing plate portion 22. The recess 20a and the pair of protrusions 20b can be formed by deforming the metal plate that constitutes the frame 20 by press working or the like. Therefore, the plate thicknesses of the main plate portion 21, the standing plate portion 22, the horizontal plate portion 23, and the side plate portion 24 are the same.

The horizontal plate portion 23 is located beside the recessed portion 20a. In this embodiment, the horizontal plate portion 23 is located on both sides of the recessed portion 20a in the short direction of the frame 20. That is, a pair of horizontal plate portions 23 are formed to sandwich the recessed portion 20a. Specifically, one of the pair of horizontal plate portions 23 is located on one side of the recessed portion 20a in the short direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the recessed portion 20a in the short direction of the frame 20. That is, one of the pair of horizontal plate portions 23 is located on one side of the main plate portion 21 in the short direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the main plate portion 21 in the short direction of the frame 20. Each of the pair of horizontal plate portions 23 is connected to the end of the standing plate portion 22 on the floor side and extends outward from the end of the standing plate portion 22 on the floor side.

When a first direction, which is the direction of the light emission side of the LEDs 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, at least a portion of each of the pair of side board portions 23 is located closer to the floor (first direction) than the main board portion 21. In this embodiment, the entire side board portion 23 is located closer to the floor than the main board portion 21. Therefore, a pair of protruding portions 20b, each of which is composed of a standing board portion 22 and a side board portion 23, is located closer to the floor than the main board portion 21.

As a result, a spatial region S1 is formed on the ceiling side of each protrusion 20b. The spatial region S1 is an area surrounded by the protrusions 20b on the ceiling side of the frame 20. In other words, the spatial region S1 is an area surrounded by the vertical plate portion 22 and the horizontal plate portion 23 on the ceiling side of the frame 20. In this embodiment, since the side plate portion 24 is provided on the opposite side of the vertical plate portion 22 in the horizontal plate portion 23, the spatial region S1 is an area surrounded by the vertical plate portion 22, the horizontal plate portion 23, and the side plate portion 24, and is a concave recessed portion recessed toward the floor side.

This spatial region S1 may house functional parts, or may house internal wires that are wired in a factory when the LED lighting device 3 is manufactured. Because the spatial region S1 is a concave recess, functional parts and internal wires can be easily housed in the spatial region S1. In particular, because the side plate portion 24 exists as the outer wall of the spatial region S1, the internal wires housed in the spatial region S1 are less likely to protrude from the spatial region S1. This makes it possible to prevent the internal wires from protruding and becoming caught.

The functional parts stored in the spatial region S1 are, for example, function expansion modules. 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, a pull switch, 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. The second light source is a light source for monitor display (monitor lamp), 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, LED light sources of red, blue, green, etc.), or an emergency light source that is turned on in an emergency. When an emergency light source is used as the second light source, the cover and/or cover member 30 covering the second light source may be made of a flame-retardant material such as glass.

The internal electric wires stored in the spatial region S1 are, for example, electric wires connected to the power supply unit 4 or electric wires connecting the multiple light source units 10 together. Of these, the electric wires connected to the power supply unit 4 include a power supply line connecting the power supply unit 4 and the light source units 10, a power line connecting the power supply unit 4 and the power terminal block 8, a dimming control line connecting the power supply unit 4 and the dimming terminal block (not shown), and a control line connected to a function expansion module (sensor, etc.) described later.

In addition, the spatial region S1 may house multiple internal wires instead of a single internal wire. The single or multiple internal wires housed in the spatial region S1 are fixed to the frame 20 by a fixing member such as tape or metal fittings. In this case, the spatial region S1 may be used to attach tape or metal fittings. For example, when fixing the internal wires using metal fittings, the metal fittings are fixed to the spatial region S1 so as to cover the spatial region S1 in which the internal wires are housed. In this case, the metal fittings may be positioned so as to be braced between the vertical plate portion 22 and the side plate portion 24.

The internal wires do not have to be stored in the spatial region S1. In this case, the internal wires may be placed on the ceiling side of the main board portion 21 of the frame 20, and may be adhesively fixed with tape. However, if the tape is only attached to the main board portion 21, the tape is likely to peel off. Therefore, in this case, it is advisable to use the spatial region S1 to attach the tape. For example, the internal wires may be placed on the ceiling side of the main board portion 21, and the tape may be attached so as to straddle the main board portion 21 and the standing board portion 22. In this way, the tape is attached to two surfaces with different orientations, which makes it possible to prevent the tape from peeling off.

The components stored in the spatial region S1 are not limited to functional components and internal electrical wires. For example, the spatial region S1 may store fixing members such as parts of screws (screw heads and screw feet) and crimped parts, or may store some or all of the electronic components 4b of the power supply device 4. Examples of the electronic components 4b of the power supply device 4 stored in the spatial region S1 include tall components such as electrolytic capacitors and infrared receivers.

As shown in the enlarged view of FIG. 3, each of the pair of horizontal plate portions 23 is composed of a plurality of plate portions. In this embodiment, the horizontal plate portion 23 is composed of two plate portions, and has a parallel plate portion 23a (first plate portion) parallel to the main plate portion 21 and an inclined plate portion 23b (second plate portion) inclined relative to the main plate portion 21. Both the parallel plate portion 23a and the inclined plate portion 23b are flat.

In the horizontal plate portion 23, the parallel plate portion 23a extends in the short side direction (width direction) of the frame 20, and the inclined plate portion 23b extends in a direction inclined with respect to the short side direction of the frame 20. In this embodiment, the inclined plate portion 23b is inclined so as to widen toward the ceiling side. Therefore, the protruding portion 20b composed of the standing plate portion 22 and the horizontal plate portion 23 is configured to be inclined outward as a whole. The inclined plate portion 23b is located outside the parallel plate portion 23a and is connected to the end of the side plate portion 24. In this embodiment, the length of the parallel plate portion 23a is longer than the length of the inclined plate portion 23b.

As shown in Figures 3 and 4, at least a portion of the pair of protrusions 20b formed on the frame 20 is located on the floor side of the opening surface of the recess 2a of the instrument body 2. In other words, at least a portion of the pair of protrusions 20b is located on the floor side of the opening edge 2a1 of the recess 2a of the instrument body 2. In this embodiment, the pair of side plate portions 23 are located on the floor side of the opening surface of the recess 2a of the instrument body 2. Specifically, both the parallel plate portion 23a and the inclined plate portion 23b of the side plate portion 23 are located on the floor side of the opening surface of the recess 2a.

The protruding portion 20b, which is composed of the horizontal plate portion 23 and the vertical plate portion 22, may be configured to be inclined inward. In this case, the inclined plate portion 23b of the horizontal plate portion 23 is located inside the parallel plate portion 23a and is connected to the end of the main plate portion 21, and the vertical plate portion 22 is located outside the parallel plate portion 23a of the horizontal plate portion 23 and is connected to the end of the side plate portion 24.

3 and 4, the pair of side plate portions 24 are plate-shaped side portions and are formed as a pair of legs (feet) of the frame 20. Each of the pair of side plate portions 24 is an extension portion that extends from the end of the horizontal plate portion 23 toward the ceiling side (second direction side). Specifically, one of the pair of side plate portions 24 extends from the outer end of one of the pair of horizontal plate portions 23 toward the ceiling side, and the other of the pair of side plate portions 24 extends from the outer end of the other of the pair of horizontal plate portions 23 toward the ceiling side. In other words, the pair of side plate portions 24 extend from the outer end of the protruding portion 20b in the short direction of the frame 20 toward the ceiling side. Specifically, each of the pair of side plate portions 24 extends in the Z-axis direction.

Each of the pair of side plate portions 24 extends from the outer end of each horizontal plate portion 23 beyond the position of the main plate portion 21 toward the ceiling side. Therefore, the tip of each side plate portion 24 (extension portion) is located closer to the ceiling side (second direction side) than the main plate portion 21. In other words, the tip of the side plate portion 24 is located closer to the ceiling side than the recessed portion 20a. In this embodiment, the side plate portion 24 is connected to the inclined plate portion 23b of the horizontal plate portion 23.

In this embodiment, the connection between the side plate portion 24 and the horizontal plate portion 23 is located closer to the floor (first direction side) than the main plate portion 21, which is the bottom of the recess 20a. This makes it easier for the light emitted from the LED 12 to reach the spatial area formed near the outer end portion 31a of the cover member 30.

The length (extension) of the side plate portion 24 is longer than the depth of the recess 20a. That is, as shown in FIG. 4, if the depth of the recess 20a is a and the length of the side plate portion 24 is b (see also FIG. 3), the relationship b≧a should be satisfied. In this case, the upper limit of the length b of the side plate portion 24 is not particularly limited, but the depth a of the recess 20a and the length b of the side plate portion 24 should satisfy the relationship b≦2×a. That is, the ratio of the depth of the recess 20a to the length of the side plate portion 24 should be 1:2 or less. This allows the thickness of the entire frame 20 in the Z-axis direction to be shortened, and therefore the frame 20 can be made thinner.

The connection between the side plate portion 24 and the horizontal plate portion 23 may be located closer to the ceiling than the main plate portion 21. In this case, the length b of the side plate portion 24 should be longer than the depth a of the recess 20a (i.e., b>a), but the length b of the side plate portion 24 may be shorter than the depth a of the recess 20a. In this case, the lower limit of the length b of the side plate portion 24 is not particularly limited. The depth a of the recess 20a is preferably 3 mm or more.

3 and 4, the tip portions of the pair of side plate portions 24 are provided with bent portions 24a that are formed to be bent. In this embodiment, the bent portions 24a are bent portions formed by folding the tip portions of the side plate portions 24 in the thickness direction. Therefore, the bent portions 24a 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 24a can be formed, for example, by curling and rolling up the tip portions of the side plate portions 24. Note that the bent portion 24a is not limited to being formed by curling, and may be formed by hemming or the like. Note that the bent portion 24a 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 24a may not be formed.

The mounting portion 33 of the cover member 30 is attached to each of the pair of side plate portions 24. Specifically, the bent portion 24a of the side plate portion 24 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 by 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 the enlarged view of 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 located outside the protruding portion 20b 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 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 on the XZ cross section with respect to the center of the short side of the cover member 30, but this is not limited to this.

Each extension portion 32 has an outer extension portion 32a located outside the horizontal plate portion 23 of the frame 20 in the short direction of the frame 20, and an inner extension portion 32b extending from the outer extension portion 32a toward the LED 12 side so as to cover at least a portion of the horizontal plate portion 23.

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 so as to bend at the horizontal plate portion 23 of the frame 20. The inner extension 32b is bent so as to cover the protruding portion 20b of the frame 20.

The extension portion 32 extends from the inner surface of the main portion 31 toward the inside of the cover member 30. That is, the extension portion 32 extends from the inner surface of the main portion 31 toward the LED 12 side. The extension portion 32 extends toward the LED 12 side from a position on the ceiling side (second direction side) of the portion of the protruding portion 20b 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 20b of the frame 20 located closest to the floor is the parallel plate portion 23a of the horizontal plate portion 23. That is, the extension portion 32 extends toward the LED 12 side from a position closer to the ceiling than the parallel plate portion 23a. Specifically, the extension portion 32 is connected to the tip of the outer end portion 31a of the main portion 31. Therefore, in the 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.

In this way, the extension portion 32 extends toward the LED 12 side from a position on the ceiling side of the portion of the horizontal plate portion 23 of the frame 20 that is located closest to the floor side. This allows a spatial area to be formed near the outer end 31a of the cover member 30 that extends toward the ceiling side outside the protruding portion 20b of the frame 20. As a result, even if the protruding portion 20b that protrudes toward the floor side is provided on the frame 20, the light emitted from the LED 12 that does not pass through the main portion 31 of the cover member 30 and is reflected on the inner surface of the main portion 31 can be made to go around to the spatial area formed near the outer end 31a of the cover member 30. Therefore, the light emitted from the LED 12 can be sufficiently spread to the outer end 31a of the main portion 31 of the cover member 30, so that it can be sufficiently illuminated to the vicinity of the outer end 31a of the main portion 31 of the cover member 30. Therefore, the cover member 30 can be illuminated over the entire width direction (X-axis direction), and the widthwise ends of the cover member 30 can be prevented from becoming dark. In other words, the darkness of the widthwise ends of the cover member 30 caused by the protrusions 20b of the frame 20 can be reduced.

In addition, by providing the extension portion 32 on the cover member 30, the luminous flux (upward luminous flux) of the illumination light emitted from the LED lighting device 3 toward the ceiling side can be reduced. As a result, the luminous flux of the illumination light emitted from the LED lighting device 3 toward the floor side can be increased, thereby improving the direct illuminance of the LED lighting fixture 1. As a result, when multiple LED lighting fixtures 1 are installed, the number of installed LED lighting fixtures 1 can be reduced.

The outer extension 32a of the extension 32 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 or the ceiling (i.e., in the Z direction). The outer extension 32a also faces the opening edge 2a1 of the recess 2a. Therefore, the outer extension 32a is formed to span the gap G. With this configuration, the vicinity of the outer end 31a of the main portion 31 of the cover member 30 can be sufficiently illuminated, so that the main portion 31 of the cover member 30 can be illuminated throughout the entire width direction (X-axis direction). Therefore, it is possible to prevent the ends of the cover member 30 in the width direction from becoming dark.

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.

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

As shown in FIG. 3, the inner extension 32b is bent so as to protrude toward the floor side. In other words, the inner extension 32b is formed to have a protruding portion that protrudes toward the floor side, similar to the protruding portion 20b of the frame 20. The protruding portion 20b of the frame 20 protrudes toward the bent portion (protruding portion) of this inner extension 32b. Therefore, the protruding portion 20b of the frame 20 is formed to fit into the protruding portion of the inner extension 32b.

In addition, at least a portion of the inner extension portion 32b can abut against the frame 20. Specifically, at least a portion of the inner extension portion 32b can abut against a portion of the protruding portion 20b of the frame 20. More specifically, the inner extension portion 32b can abut against the parallel plate portion 23a and the inclined plate portion 23b of the horizontal plate portion 23.

In this embodiment, the inner extension portion 32b has a first surface portion 32b1 that faces the parallel plate portion 23a of the horizontal plate portion 23, a second surface portion 32b2 that faces the inclined plate portion 23b of the horizontal plate portion 23, and a third surface portion 32b3 that slopes from the inner end of the first surface portion 31b1 toward the LED 12 side.

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 horizontal plate portion 23. 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 parallel plate portion 23a and the inclined plate portion 23b of the horizontal plate portion 23 in the frame 20.

In each of the pair of extensions 32, the first surface 32b1 and the second surface 32b2 of the inner extension 32b are flat, similar to the parallel plate portion 23a and the inclined plate portion 23b of the horizontal plate portion 23.

In addition, 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 parallel plate portion 23a of the horizontal plate portion 23 of the frame 20. The second surface portion 32b2 is an inclined plate portion inclined relative to the main plate portion 21 of the frame 20, similar to the inclined plate portion 23b of the horizontal plate portion 23 of the frame 20. The first surface portion 32b1 of the inner extension portion 32b and the parallel plate portion 23a of the horizontal plate portion 23 are parallel and face each other. Similarly, the second surface portion 32b2 of the inner extension portion 32b and the inclined plate portion 23b of the horizontal plate portion 23 are parallel and face each other.

In this embodiment, each extension portion 32 is not in contact with the horizontal plate portion 23. This makes it possible to prevent abnormal noise caused by contact between the extension portion 32 and the horizontal plate portion 23. At least a portion of the extension portion 32 may be in contact with the horizontal plate portion 23. For example, the first surface portion 32b1 of the inner extension portion 32b of the extension portion 32 may be in contact with the parallel plate portion 23a of the horizontal plate portion 23, or the second surface portion 32b2 of the inner extension portion 32b of the extension portion 32 may be in contact with the inclined plate portion 23b of the horizontal plate portion 23.

The tip of each extension 32 is located closer to the center of the frame 20 than the protruding portion 20b of the frame 20. Specifically, the tip of the third surface portion 32b3 of the inner extension 32b of each extension 32 is located closer to the center of the frame 20 than the inner end of the horizontal plate portion 23 of the frame 20.

The third surface portion 32b3 of the inner extension portion 32b is formed so that its tip extends toward the substrate 11. In this embodiment, the third surface portion 32b3 is formed so that it is inclined toward the substrate 11. Note that the third surface portion 32b3 may not be inclined and may extend parallel to the substrate 11, similar to the first surface portion 32b1.

In the Z-axis direction, the tip of the extension 32 overlaps with the substrate 11. Specifically, the tip of the third surface 32b3 in the inner extension 32b overlaps with the substrate 11. In this embodiment, the tip of the third surface 32b3 is in contact with 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 24 of the frame 20. In addition, by pressing down the substrate 11 with the extension 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 substrate 11 is fixed to the frame 20 with adhesive or the like and the adhesive peels off, the substrate 11 that is detached from the frame 20 is supported by the extension 32. In other words, it is possible to prevent the substrate 11 from falling. Note that the tip of the third surface 32b3 does not have to be in contact with the substrate 11.

Each extension portion 32 may be disposed outside the directional characteristic (light distribution angle) of the LED 12. For example, since the light distribution angle (1/2 beam angle) of the LED 12 is 120°, the opening angle (tilt angle of the third surface portion 32b3) of the pair of extension portions 32 may be 120° or more. 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. The opening angle of the pair of third surface portions 32b3 may be 160° or more. The upper limit of the opening angle of the pair of third surface portions 32b3 is, for example, 170°.

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 screw base or screw head 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 screw base of the screw 50 for fixing the power supply unit 4 to the frame 20.

Furthermore, the space between each extension portion 32 and the frame 20 may house functional components or internal electrical wires, similar to the spatial region S1 formed by the protruding portion 20b of the frame 20.

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 24 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 24a provided at the tip of the side plate portions 24 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 24 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 24 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 24 and the mounting portion 33 overlap from the outside of the mounting portion 33. The frame 20 and the cover member 30 may also be fixed together with a crimping structure. For example, the frame 20 and the cover member 30 may be fixed together by crimping a part of the side plate portion 24 of the frame 20 to the mounting portion 33 of the cover member 30.

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 24a 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 region S2 is formed on the ceiling side of the frame 20. In other words, the spatial region S2 exists between the fixture body 2 and the frame 20. The spatial region S2 is also a part or the entirety of the recess 2a of the fixture body 2.

The power supply device 4 is disposed in this spatial region S2. That is, the power supply device 4 is disposed on the ceiling side of the frame 20. In this embodiment, the center position of the power supply device 4 is offset from the center position in the short side direction of the LED lighting device 3, and the power supply device 4 is disposed biased in the short side direction of the LED lighting device 3 (short side direction of the frame 20) in the spatial region S2. Specifically, the power supply device 4 is biased toward the hook metal fitting 5 side (left side in FIG. 4). In addition, the side plate portion 24 of the frame 20 is shortened, and the circuit board 4a of the power supply device 4 is located on the ceiling side of the tip of the side plate portion 24 of the frame 20 within the circuit case 4c.

In addition, since the portion of the circuit case 4c of the power supply device 4 facing the frame 20 is open, the second direction side of the horizontal plate portion 23 is open toward the circuit case 4c of the power supply device 4. Therefore, the spatial area S1 formed by the protruding portion 20b of the frame 20 and the spatial area inside the circuit case 4c are in communication. This allows the spatial area S1 formed by the protruding portion 20b of the frame 20 to be effectively utilized.

In the spatial region S2 between the fixture body 2 and the frame 20, wires used in the LED lighting device 3 may be arranged. The wires used in the LED lighting device 3 include construction wires (construction wiring) that are wired when the LED lighting fixture 1 is installed on a ceiling or the like, and internal fixture wires (internal fixture wiring) that are wired in a factory when the LED lighting device 3 is manufactured.

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 a specified location 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.

4 shows an example in which a VVF cable 61 and a signal line 62 are arranged in the space area S2 as construction wires. In this case, in the present embodiment, the power supply device 4 is arranged offset in the space area S2, so that the ceiling side of one of the pair of horizontal plate parts 23 of the frame 20 (the right horizontal plate part 23 in FIG. 4) is open. As a result, as shown in FIG. 4, in the area in the space area S2 where the power supply device 4 exists, the area on one side in the short direction of the LED lighting device 3 is larger than the area on the other side. In other words, one side of the two sides of the power supply device 4 in the space area S2 is a wide area, and the other side of the two sides of the power supply device 4 in the space area S2 is a narrow area. For this reason, it is preferable to arrange the construction wiring in the wider area of the two areas on both sides of the power supply device 4. In particular, in this embodiment, the length (height) of the side plate part 24 of the frame 20 is short, so that the vertical space of the space area S2 around the side plate part 24 can be further widened. For this reason, the construction wiring can be arranged by effectively utilizing this wider space area S2. For example, the construction wiring can be arranged close to the ceiling end of the spatial area S2 on the side of the fixture body 2. In this way, the construction wiring can be arranged by effectively utilizing the wide spatial area S2, so that the construction wiring can be prevented from interfering with the LED lighting device 3 and causing it to float, resulting in a gap between the fixture body 2 and the LED lighting device 3.

The construction wiring may be arranged separately in a wide area and a narrow area in the spatial area S2. In this case, the VVF cable 61, which is a relatively thick wire, may be arranged in the wide area of the two areas on either side of the power supply device 4, and the signal line 62, which is a relatively thin wire, may be arranged in the narrow area of the two areas on either side of the power supply device 4.

The internal wires arranged in the spatial region S2 include the above-mentioned internal wires stored in the spatial region S1.

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 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 frame 20. As an example, the hook fitting 5 is fixed to the frame 20 by a fixing member such as a screw, and extends outward from 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 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 widthwise end of the frame 20 on the ceiling side of the frame 20. The elastic retaining member 6 is fixed to the opposite side of the frame 20 from the hook bracket 5 in the width direction. The elastic retaining member 6 is fixed to the frame 20 by a fixing member such as a screw. Specifically, the elastic retaining member 6 is fixed to a retaining bracket 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 bracket 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 that face each other in the lateral direction 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.

In this embodiment, the power supply unit 4 is positioned offset to one side in the width direction of the frame 20. Specifically, the power supply unit 4 is positioned closer to the rotation axis. In this way, by positioning the heavy power supply unit 4 closer to the rotation axis, the LED lighting device 3 can be rotated with a small force.

Then, by rotating the LED lighting device 3 and pushing it 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). At this time, the opening edge 2a1 of the recess 2a comes into contact with the outer end 31a of the cover member 30. 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.

Here, the relationship between the shape of the protruding portion 20b of the frame 20 and the strength of the frame 20 was examined, and the results of the examination will be described with reference to FIG. 10. FIG. 10 is a diagram showing the relationship between the shape of the protruding portion 20b of the frame 20 and the strength of the frame 20. As shown in FIG. 10, the strength (rigidity) of the frame 20 was evaluated by the moment of inertia. The values of the moment of inertia shown in FIG. 10 show the results of calculations for a half cross section of each frame 20, and the values for the entire cross section are doubled. The dimensions of each frame 20 were set to a half cross section width of 30 mm, a depth of the recess 20a of 3 mm, and a plate thickness of 0.5 mm. In addition, in each frame 20, the ratio of the depth a of the recess 20a, the width w1 of the recess 20a, and the entire width w3 of the frame 20 was unified at a:w1:w3=1:10:20.

In FIG. 10, pattern 1 is a configuration in which there is no side plate portion 24 (foot), pattern 2 is a configuration in which the length of the side plate portion 24 reaches the bottom of the recess 20a, pattern 3 is a configuration in which the ratio of the depth of the recess 2a to the length of the side plate portion 24 is 1:1, pattern 4 is a configuration in which the ratio of the depth of the recess 2a to the length of the side plate portion 24 is 1:1.5, and pattern 5 is a configuration in which the ratio of the depth of the recess 2a to the length of the side plate portion 24 is 1:2.

In addition, Structure 1 is a configuration in which the horizontal plate portion 23 of the frame 20 is composed only of the inclined plate portion 23b in patterns 1 to 5. Structure 2 is a configuration in which the horizontal plate portion 23 of the frame 20 is composed only of the parallel plate portion 23a in patterns 1 to 5. Structure 3 is a configuration in which the horizontal plate portion 23 of the frame 20 is composed of the parallel plate portion 23a and the inclined plate portion 23b in patterns 1 to 5. Note that the shape of the frame 20 shown in Figures 3 and 4 is patterns 3 to 5 of Structure 3, but the frame of this embodiment also includes frames of the configurations shown in patterns 3 to 5 of Structure 1 and patterns 4 to 5 of Structure 2.

As can be seen from comparing patterns 1 and 2 with patterns 3 to 5 as shown in Figure 10, the value of the moment of area becomes significantly larger when the tip of the side plate portion 24 of the frame 20 exceeds the recess 20a. In other words, the strength of the frame 20 is significantly improved when the tip of the side plate portion 24 of the frame 20 exceeds the recess 20a.

In addition, as can be seen by comparing Structure 1 with Structure 2, the value of the second moment of area is significantly larger when the horizontal plate portion 23 is made up of only the parallel plate portion 23a than when it is made up of only the inclined plate portion 23b. Furthermore, as can be seen by comparing Structure 2 with Structure 3, the value of the second moment of area is larger when the horizontal plate portion 23 is made up of the parallel plate portion 23a and the inclined plate portion 23b than when it is made up of only the parallel plate portion 23a.

In this way, by using the shape of frame 20 in this embodiment (i.e., patterns 3 to 5 of structure 1, patterns 4 to 5 of structure 2, and patterns 3 to 5 of structure 3), the value of the second moment of area becomes 20 or more, and the strength of frame 20 can be significantly improved.

As described above, the LED lighting device 3 and LED lighting fixture 1 according to this embodiment include a substrate 11 on which the LEDs 12 are arranged, a long, plate-like frame 20 to which the substrate 11 is attached, and a cover member 30 attached to the frame 20 so as to cover the LEDs 12. The frame 20 has a recess 20a in which the substrate 11 is arranged, a pair of horizontal plate portions 23 located on both sides of the recess 20a in the short direction of the frame 20 and extending along the longitudinal direction of the frame 20, and side plate portions 24 which are extensions extending from the pair of horizontal plate portions 23 toward the ceiling, and the tips of the side plate portions 24 are located closer to the ceiling than the recess 20a of the frame 20.

As described above, the frame 20 in this embodiment has a recess 20a formed therein, and a protrusion 20b formed of a horizontal plate portion 23 is formed on the side of the recess 20a. This increases the strength of the frame 20. Furthermore, in this embodiment, the tip of the side plate portion 24 extending from the horizontal plate portion 23 toward the ceiling is extended so as to be positioned closer to the ceiling than the recess 20a. This further increases the strength of the frame 20.

This makes it possible to easily ensure the required strength of the frame 20 even if the length of the side plate portion 24 of the frame is shortened to make the frame 20 thinner. In other words, the strength of the frame 20 reduced by shortening the length of the side plate portion 24 of the frame 20 can be compensated for by forming a protruding portion 20b that protrudes toward the floor. Therefore, even with a plate-shaped frame 20, the frame 20 can be made thinner while still ensuring its strength. In other words, it is possible to achieve both ensuring the strength of the frame 20 and making it thinner.

Specifically, as shown in FIG. 4, when the depth of the recess 20a of the frame 20 is a and the length of the side plate portion 24 of the frame 20 is b, the required strength of the frame 20 can be easily ensured even if the side plate portion 24 is shortened to make the frame 20 thinner so as to satisfy the relational expression b≦2×a. In this case, as shown in FIG. 4, when the depth of the recess 20a is a and the width (total width) of the frame 20 is w3, it is preferable that the relational expression w3≦20×a is satisfied. In other words, it is preferable that the ratio of the depth of the recess 20a to the total width of the frame 20 is 1:20 or less. This makes it possible to realize a flat and thin frame 20 with a large aspect ratio.

Moreover, by shortening the length of the side plate portion 24 of the frame 20, the weight and cost of the frame 20 can be reduced. Furthermore, by shortening the length of the side plate portion 24 of the frame 20, the ease of installation when attaching and detaching the LED lighting device 3 to the fixture body 2 can be improved. Specifically, by shortening the length of the side plate portion 24 of the frame 20 and reducing the overall height of the frame 20, the LED lighting device 3 can be easily rotated and easily inserted into the recess 2a of the fixture body 2, fingers can be easily inserted and the construction wire can be easily attached and detached to the connector, it is easy to look inside when attaching the LED lighting device 3 to the fixture body 2, making it less likely that the wire will get caught, and it is easy to pinch the elastic holding member 6 (kick spring) during installation when attaching the LED lighting device 3 to the fixture body 2.

In addition, the LED lighting device 3 according to this embodiment is configured so that the inner extension portion 32b of the extension portion 32 of the cover member 30 can abut against the horizontal plate portion 23 of the frame 20. Specifically, the parallel plate portion 23a and the inclined plate portion 23b of the horizontal plate portion 23 of the frame 20 can abut against the first surface portion 32b1 and the second surface portion 32b2 of the extension portion 32 of the cover member 30 at a surface rather than at a point.

This configuration firmly fixes the frame 20 and the cover member 30, so even if the length of the side plate portion 24 of the frame 20 is shortened to make the frame 20 thinner, an LED lighting device 3 with high strength can be obtained.

In this way, in the LED lighting device 3 according to the present embodiment, the strength of the frame 20 is ensured, so that the LED lighting device 3 is prevented from being deformed during installation when the LED lighting device 3 is attached to or removed from the fixture body 2, and from being pushed by its own weight or electric wires after installation, and from being bent. As a result, it is possible to prevent a gap from being generated between the LED lighting device 3 and the opening edge 2a1 of the recess 2a of the fixture body 2. This prevents the construction wire or the electric wire inside the fixture from protruding from between the LED lighting device 3 and the opening edge 2a1 of the recess 2a of the fixture body 2, and prevents the construction wire or the electric wire inside the fixture from being pinched between the LED lighting device 3 and the fixture body 2. It is also possible to prevent a gap from being generated between the LED lighting device 3 and the fixture body 2, which reduces the design of the LED lighting fixture 3.

In addition, as in the LED lighting fixture 1 and LED lighting device 3 according to this embodiment, the length of the side plate portion 24 of the frame 20 is shortened to thin the frame 20, thereby making it possible to widen the spatial region S2 enclosed by the frame 20 and the recess 2a of the fixture body 2.

This allows the spatial area S2 to be effectively utilized. Specifically, various components such as functional parts, electric wires such as construction electric wires and electric wires inside the device, metal fittings, or the power supply unit 4 can be easily arranged in the spatial area S2. In addition, by widening the spatial area S2, the installation work when installing these components in the spatial area S2 can be easily performed. In addition, for example, as shown in FIG. 4, a VVF cable 61 and a signal line 62 are arranged in this spatial area S2 as construction electric wires. In this case, as shown in FIG. 4, if the length between the tip of the mounting part 33 of the cover member 30 and the bottom surface of the recess 2a of the device body 2 is H1 and the depth of the recess 2a of the device body 2 is H2, it is preferable that H1/H2≧1/2. This allows the construction electric wires to be easily arranged in the spatial area S2. In particular, by making H1/H2≧1/2, the VVF cable 61 can be accommodated in the spatial area S2 without protruding from the spatial area S2 even if it bends.

In FIG. 4, the VVF cable 61 arranged in the space region S2 is arranged near the bottom surface of the recess 2a of the device body 2, but this is not limited to this. For example, as shown in FIG. 11, the VVF cable 61 arranged in the space region S2 may be arranged so as to be in contact with the frame 20. In addition, since the space region S2 in this embodiment is a wide space, two overlapping VVF cables 61 can be arranged in the space region S2 as shown in FIG. 12. In addition, instead of arranging the two overlapping VVF cables 61 horizontally, the two overlapping VVF cables 61 can be arranged vertically as shown in FIG. 13. In addition, in FIG. 12 and FIG. 13, one of the two VVF cables 61 can be used as a power transmission line for supplying AC power to the adjacent LED lighting device 1 when multiple LED lighting devices 1 are installed.

In addition, in the LED lighting device 3 according to this embodiment, as shown in Figs. 3 and 4, the protrusion 20b formed on the frame 20 forms a spatial region S1 on the ceiling side of the protrusion 20b. In other words, by forming the protrusion 20b on the frame 20, not only does the strength of the frame 20 increase, but a spatial region S1 is formed on the ceiling side of the protrusion 20b.

As described above, this spatial region S1 can store components such as functional parts or internal electric wires, and the spatial region S1 can be effectively utilized. Note that the method of utilizing the spatial region S1 is not limited to storing components such as functional parts or internal electric wires, and the spatial region S1 can also be used for centering metal fittings, positioning metal fittings, guiding metal fittings, earth conduction, etc. Earth conduction is connecting the circuit case 4c and/or frame 20 of the power supply unit 4 to earth via metal fittings. Metal fittings include mounting fittings, power supplies, dimming terminal fittings, springs, etc.

For example, as shown in FIG. 14, by disposing a part of the metal fitting 70 in the spatial region S1, it is possible to achieve centering, positioning, guiding, or earthing of the metal fitting 70. In this case, by engaging a bent portion of the metal fitting 70 with the vertical plate portion 22 of the frame 20, it is possible to center the metal fitting 70, etc.

Also, as shown in FIG. 15, a protrusion 71 (half-moon dowel) may be formed on a portion of the metal fitting 70A, and the protrusion 71 may be inserted into a through hole 20c provided in the upright portion 22 of the frame 20A to center the fitting 70A. With this structure, the protrusion 71 fits into the through hole 20c and is less likely to come out, so the fitting 70A can be easily and firmly fixed to the frame 20.

Also, as shown in FIG. 16, a portion of the metal fitting 70B may be cut and raised to form a cut-and-raised piece 72, which may then be engaged with the connection (corner) between the main plate portion 21 and the standing plate portion 22 of the frame 20, thereby allowing centering of the fitting 70B. In this case, the cut-and-raised piece 72 is disposed in the spatial region S1. With this structure, the cut-and-raised piece 72 functions as a guide, making it easy to align the fitting 70B.

Also, as shown in FIG. 17, a protrusion 73 (half-moon dowel) may be formed on a portion of the sheet metal fitting 70C, and this protrusion 73 may be engaged with the upright portion 22 of the frame 20, thereby allowing centering of the fitting 70C, etc. In this case, the protrusion 73 is disposed in the spatial region S1. With this structure, the protrusion 73 functions as a guide, making it easy to align the fitting 70C.

Also, as shown in FIG. 18, a part of a metal fitting 70D that holds the kick spring, which is the elastic holding member 6, may be stored in the spatial region S1. In FIG. 18, (a) is a cross-sectional view, and (b) is a side view. The metal fitting 70D may be the holding metal fitting 6c (see FIG. 6) described above.

Although not shown, a part or all of the coil portion of the kick spring, which is the elastic retaining member 6, may be stored in the space region S1 without using the metal fittings 70D. This makes it possible to prevent the kick spring from falling in the width direction. In this case, by extending the side plate portion 24 of the frame 20 until it is positioned to the side of the coil portion of the kick spring, the kick spring can be further prevented from falling. In addition, the root portion and tip portion, which are both ends of the kick spring, which is the elastic retaining member 6, may be stored in the space region S1. This makes it possible to prevent both ends (edges) of the kick spring from being exposed and also makes it possible to prevent both ends of the kick spring from protruding.

As shown in Figures 3 and 4, in the LED lighting device 3 according to this embodiment, the circuit board 4a of the power supply device 4 is located closer to the ceiling than the tip of the side plate portion 24 of the frame 20. As a result, the multiple electronic components 4b mounted on the circuit board 4a are not sandwiched between the pair of side plate portions 24 of the frame 20, and are exposed from the frame 20 when viewed from the side.

If the power supply 4 were completely covered by a frame with a U-shaped cross section, the side of the circuit case 4c of the power supply 4 would not necessarily come into contact with the side plate of the frame, so the heat generated from the heat-generating components among the multiple electronic components 4b in the power supply 4 would be trapped in the inner area of the frame (the area surrounded by the U-shape). In contrast, since the circuit board 4a is located closer to the ceiling than the tip of the side plate portion 24 of the frame 20, the heat-generating components mounted on the circuit board 4a are exposed and not covered by the side plate portion 24 of the frame 20, so that the heat generated from the heat-generating components of the power supply 4 is less likely to be trapped in the area (space area S2) on the ceiling side of the frame 20. Moreover, since the circuit board 4a is located closer to the ceiling than the tip of the side plate portion 24 of the frame 20, the power supply 4 can be made less susceptible to radiant heat from the LED 12. In this case, as shown in FIG. 4, if the length between the tip of the mounting portion 33 of the cover member 30 and the bottom surface of the recess 2a of the device body 2 is H1 and the depth of the recess 2a of the device body 2 is H2, it is preferable that H1/H2≧1/2. This makes it even more difficult for heat generated by the heat-generating components of the power supply device 4 to accumulate.

As shown in FIG. 4, in the LED lighting device 3 of this embodiment, a through hole 4d is provided in the side plate of the circuit case 4c of the power supply device 4. This allows the heat generated by the heat-generating components of the power supply device 4 to be effectively dissipated by natural convection through the through hole 4d. This further prevents heat from building up in the spatial region S2.

As shown in FIG. 4, in the LED lighting device 1 of this embodiment, a through hole 2d is provided on the inner wall surface of the recess 2a of the device body 2. This allows the heat generated by the heat-generating components of the power supply device 4 to be dissipated more effectively not only through the through hole 4d but also through the through hole 2d. This further prevents heat from building up in the spatial region S2.

(Modification)
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.

For example, in the above embodiment, various shapes of frames are exemplified as frames used in the LED lighting device 3, 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, in the above embodiment, the horizontal plate portion 23 is composed of the parallel plate portion 23a and the inclined plate portion 23b, but this is not limited to this. For example, as in the frame 201 shown in FIG. 19, the horizontal plate portion 23 may be composed only of parallel plate portions, or as in the frame 202 shown in FIG. 20, the horizontal plate portion 23 may be composed only of inclined plate portions. In this case, as in the frame 202 shown in FIG. 20, the horizontal plate portion 23 may be composed only of inclined plate portions inclined toward the outside, or as in the frame 203 shown in FIG. 21, the horizontal plate portion 23 may be composed only of inclined plate portions inclined toward the inside.

In the above embodiment, the vertical plate portion 22 of the frame 20 is vertically erected with respect to the main plate portion 21, but this is not limited to this. For example, as in the frame 204 shown in FIG. 22, the vertical plate portion 22 may be an inclined plate portion provided so as to be inclined with respect to the main plate portion 21. In this case, in the frame 204 shown in FIG. 22, the horizontal plate portion 23 is composed only of an inclined plate portion inclined toward the outside. Also, in FIG. 22, the position of the connection portion between the horizontal plate portion 23 and the side plate portion 24 is the same as the position of the main plate portion 21 (the bottom of the recess 20a), but this is not limited to this. Specifically, as in the frame 205 shown in FIG. 23, the position of the connection portion between the horizontal plate portion 23 and the side plate portion 24 may be located closer to the floor than the main plate portion 21 (the bottom of the recess 20a). Also, although not shown, the position of the connection portion between the horizontal plate portion 23 and the side plate portion 24 may be located closer to the ceiling than the main plate portion 21 (the bottom of the recess 20a).

Also, as in the frame 206 shown in FIG. 24, the horizontal plate portion 23 may be composed of a curved plate portion.Also, as in the frame 207 shown in FIG. 25, the standing plate portion 22 may be composed only of an inclined plate portion and the horizontal plate portion 23 may be composed only of a parallel plate portion, or as in the frame 208 shown in FIG. 26, the standing plate portion 22 may be composed only of an inclined plate portion and the horizontal plate portion 23 may be composed of a parallel plate portion and an inclined plate portion.

Also, as in the frame 209 shown in FIG. 27, the horizontal plate portion 23 may be formed in a stepped shape. That is, the horizontal plate portion 23 may have a step. In this case, in the frame 209 shown in FIG. 27, the horizontal plate portion 23 having a step is composed of two parallel plate portions having different height positions from the main plate portion 21, but this is not limited to this. For example, as in the frame 210 shown in FIG. 28, the horizontal plate portion 23 having a step may have a parallel plate portion and an inclined plate portion located inside the parallel plate portion, as in the frame 211 shown in FIG. 29, the horizontal plate portion 23 having a step may have a parallel plate portion and an inclined plate portion located outside the parallel plate portion and inclined inward, as in the frame 212 shown in FIG. 30, the horizontal plate portion 23 having a step may have an inclined plate portion inclined outward and an inclined plate portion inclined inward. Also, as in the frame 213 shown in FIG. 31, the horizontal plate portion 23 may be stepped with an inclined plate portion and a parallel plate portion, and the standing plate portion 22 may be an inclined plate portion, or as in the frame 214 shown in FIG. 32, the horizontal plate portion 23 may be stepped with two parallel plate portions, and the standing plate portion 22 may be an inclined plate portion.

As shown in FIG. 33, a reinforcing rib 21b may be formed at the boundary between the main plate portion 21 and the standing plate portion 22. This ensures the strength of the frame even if the side plate portion 24 is short. The reinforcing rib 21b may be formed, for example, by pressing.

In addition, in the above embodiment, the side plate portion 24 of the frame 20 extends from each of the pair of horizontal plate portions 23, but this is not limited to the above. For example, the side plate portion 24 of the frame 20 may extend from only one of the pair of horizontal plate portions 23. In other words, it is sufficient that the side plate portion 24 extends from at least one of the pair of horizontal plate portions 23.

In addition, in the above embodiment, the outer extension 32a of the cover member 30 may be part of the main portion 31. In this case, the extension 32 of the cover member 30 is, for example, only the inner extension 32b, and 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 cover member 30 is made of one type of resin material, but this is not limited thereto. Specifically, the cover member 30 may be made of two or more types of materials. In this case, at least a part of the extension portion 32 of the cover member and the main portion 31 can be made of different materials. For example, the main portion 31 and the mounting portion 33 can be made of different resin materials from the extension portion 32. Specifically, the main portion 31, the mounting portion 33, the outer extension portion 32a of the extension portion 32, and the second surface portion 32b2 of the inner extension portion 32b of the extension portion 32 can be made of a translucent resin material, and the first surface portion 32b1 and the third surface portion 32b3 of the inner extension portion 32b of the extension portion 32 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 32 from a white or milky white resin material, it is possible to give the inner extension portion 32b a reflective function. As a result, light emitted from the LED 12 that reaches the inner extension portion 32b of the extension portion 32 can be reflected by the inner extension portion 32b and made to enter the main portion 31. As a result, the direct illuminance of the LED lighting device 1 can be improved, so that when multiple LED lighting devices 1 are installed, the number of LED lighting devices 1 installed can be reduced.

In the above embodiment, when the LED lighting device 3 is attached to the fixture body 2, 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 to 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 chip (bare chip) itself is used as the LED 12, multiple LEDs 12 (LED chips) are arranged in a line on the substrate 11, and the multiple LEDs 12 are collectively or individually sealed with a sealing material (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 disclosure also includes forms obtained by applying various modifications to the above-mentioned embodiments that a person skilled in the art may conceive, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope of the present invention. In addition, the present invention also includes any combination of two or more claims from among the multiple claims described in the claims at the time of filing of this application, within the scope of technical compatibility. For example, 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 all of the higher claims within the scope of technical compatibility, the present invention also includes all combinations of claims included in the multiple claim or multiple-multi claim.

REFERENCE SIGNS LIST 1 LED lighting fixture 2 Fixture body 2a Recess 3 LED lighting device 4 Power supply device 4a Circuit board 4b Electronic component 4c Circuit case 11 Board 12 LED
20, 20A, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215 Frame 20a Recess 22 Standing plate portion 23 Horizontal plate portion (plate portion)
24 Side plate portion (extension portion)
30 Cover member

The frame can be made thinner while still maintaining its strength .

Claims (9)

A substrate on which an LED is arranged;
a long, plate-like frame 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 is defined as a first direction with respect to the frame, and a direction opposite to the first direction is defined as a second direction,
the frame has a recess in which the substrate is placed, a pair of plate portions located on both sides of the recess in a short-side direction of the frame and extending along a longitudinal direction of the frame, and a pair of extending portions extending from the pair of plate portions toward the second direction,
an end portion of the LED on the first direction side is located on the second direction side of an opening surface of the recess,
The pair of extending portions have tips located on the second direction side relative to the recessed portion,
When the depth of the recess is a and the length of one of the pair of extension portions is b, the relational expression b≦2×a is satisfied.
LED lighting device. The frame has a main plate portion that is a bottom portion of the recessed portion,
The substrate is disposed on the main plate portion,
Each of the pair of plate portions is a parallel plate portion parallel to the main plate portion.
2. The LED lighting device according to claim 1. When the width of the recess is w1 and the width of one of the pair of plate portions is w2, the relational expression of w1>2×w2 is satisfied.
3. The LED lighting device according to claim 1 or 2. When the width of the recess is w1, the relational expression w1≧10×a is satisfied.
3. The LED lighting device according to claim 1 or 2. If the width of the frame is w3, the relational expression w3≦10×a is satisfied.
3. The LED lighting device according to claim 1 or 2. a power supply device for supplying power to the LED;
The power supply device is disposed on the second direction side of the frame.
3. The LED lighting device according to claim 1 or 2. The power supply device includes a circuit board on which circuit components are mounted and a case for housing the circuit board,
The power supply device is disposed offset in the short side direction of the frame.
7. The LED lighting device according to claim 6. a power supply device for supplying power to the LED;
the power supply device has a circuit board on which circuit components are mounted,
The LED lighting device according to claim 1 , wherein the circuit board is located on the second direction side of a tip of the extension portion. The LED lighting device according to claim 1 or 2;
and a fixture body having a recess in which the LED lighting device is housed.
LED lighting fixture.

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