Light fixtures, lighting devices, and translucent covers

Abstract

To obtain a lamp which is improved in reliability, a lighting device and a translucent cover.SOLUTION: A translucent cover has: a cover main body part having a translucent part extending along a first direction so that an inner surface faces one face of a pedestal, a pair of attachment parts provided along the first direction at both sideways of the pedestal, and a pair of connecting parts for connecting an end part of the translucent part in a second direction orthogonal to the first direction, and the attachment parts at both the sideways of the pedestal, and formed with a pair of sideway spaces which are surrounded by the end part of the translucent part in the second direction, the attachment parts and the connecting parts; and a lid part having an end wall part for covering one end face of the translucent part in the first direction, and an erecting part erected toward the other end face in the first direction from the end wall part so as to face the inner surface of the translucent part, and attached to an end part of the cover main body part in the first direction in a state that both end parts of the erecting part in the second direction are accommodated in the sideway spaces. In a state that the lid part is attached to the cover main body part, the translucent part is arranged in a position which does not contact with a portion except for both the end parts of the erecting part.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, a lighting device, and a light-transmitting cover installed in a lighting space.

Background Art

[0002] Conventionally, there is known a lighting fixture provided with a cover having translucency on the front side of a light source unit, and the end portion of the cover is closed with a lid to seal the light source unit (see, for example, Patent Document 1). The lighting fixture disclosed in Patent Document 1 is configured such that the lid is attached to the end portion of the cover without using an adhesive.

[0003] The lighting fixture disclosed in Patent Document 1 includes a strip-shaped substrate on which a light-emitting element is mounted, a translucent cover having a front portion curved in the lateral direction of the substrate so as to cover the front side of the substrate, and a lid that closes the longitudinal end portion of the cover. This lid is more rigid than the cover and has an insertion portion that is inserted into the longitudinal end portion of the cover with elastic deformation of the cover. And this insertion portion has a curved surface curved more than the front portion of the cover. When the insertion portion of the lid is inserted into the end portion of the cover, the front portion at the end portion of the cover elastically deforms so as to further curve following the curved surface of the insertion portion and bulges to the front side.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the lighting fixture disclosed in Patent Document 1, the front surface of the cover's end elastically deforms in the short direction to curve further, following the curved surface of the rigid cover's insertion portion. As a result, stress remains persistently on the front surface of the cover's end. Therefore, if the lighting fixture is used for a long period of time, the cover may deform and be damaged due to the residual stress. Consequently, the reliability of the lighting fixture is reduced.

[0006] This disclosure was made to solve the above-mentioned problems and to obtain luminaires, lighting devices, and translucent covers with improved reliability. [Means for solving the problem]

[0007] The luminaire according to this disclosure comprises a base extending in a first direction, a light source positioned on one side of the base, and a light-transmitting cover attached to the base so as to cover the light source, wherein the light-transmitting cover comprises a light-transmitting portion extending in the first direction such that its inner surface faces the one side of the base, a pair of mounting portions provided on both sides of the base in the first direction, and a pair of connecting portions on both sides of the base that connect the ends of the light-transmitting portion in a second direction perpendicular to the first direction to the mounting portions, and the light-transmitting portion The cover body comprises a cover body portion having a pair of lateral spaces formed by the end in the second direction, the mounting portion and the connecting portion, an end wall portion covering one end face in the first direction of the light-transmitting portion, and an upright portion erected from the end wall portion toward the other end face in the first direction so as to face the inner surface of the light-transmitting portion, and a lid portion attached to the end in the first direction of the cover body portion with each of the two ends in the second direction of the upright portion housed in the lateral spaces, wherein the lid portion is attached to the cover body portion, If the cover body is deformed, one or both of the pair of mounting portions and the ends of the light-transmitting portion in the second direction will be pressed by the ends of the upright portion in the second direction. The light-transmitting portion is positioned so as not to be in contact with the portion of the upright portion other than the ends of the upright portion. Therefore, a gap is secured between the upright portion and the portion excluding both ends, allowing air to flow. It is structured.

[0008] The lighting device relating to this disclosure comprises the above-mentioned luminaire and a fixture provided with a luminaire mounting section to which the luminaire is attached.

[0009] The light-transmitting cover according to this disclosure is a light-transmitting cover attached to a base so as to cover a light source located on one side of the base extending in a first direction, and comprises: a light-transmitting portion extending in the first direction such that its inner surface faces the one surface of the base; a pair of mounting portions provided on both sides of the base in the first direction; a pair of connecting portions on both sides of the base connecting the ends of the light-transmitting portion in a second direction perpendicular to the first direction to the mounting portions, and a cover body portion having a pair of lateral spaces formed by the light-transmitting portion, the mounting portions and the connecting portions; an end wall portion covering one end face of the light-transmitting portion in the first direction; and an upright portion erected from the end wall portion toward the other end face in the first direction so as to face the inner surface of the light-transmitting portion, and a lid portion attached to the end of the cover body portion in the first direction with each of the ends of the upright portion in the second direction housed in the lateral spaces, wherein the lid portion is attached to the cover body portion, If the cover body is deformed, one or both of the pair of mounting portions and the ends of the light-transmitting portion in the second direction will be pressed by the ends of the upright portion in the second direction. The light-transmitting portion is positioned so as not to be in contact with the portion of the upright portion other than the ends of the upright portion. Therefore, a gap is secured between the upright portion and the portion excluding both ends, allowing air to flow. It is structured. [Effects of the Invention]

[0010] According to this disclosure, when the cover body is deformed, when the lid is attached to the cover body of the translucent cover, both ends of the upright portion, which are housed in the lateral space, come into contact with the ends of the translucent portion. As a result, the deformation of the cover body is corrected, a gap is formed between the upright portion of the lid and the translucent portion, and the translucent portion is positioned so that it does not come into contact with the upright portion. Consequently, damage to the translucent cover due to deformation is suppressed, and reliability is improved. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing one example configuration of a lighting device according to Embodiment 1. [Figure 2] Figure 1 is a segmented perspective view of the lighting device shown. [Figure 3]It is a perspective view showing the surface facing the appliance for the lighting fixture shown in FIG. 1. [Figure 4] It is an exploded perspective view showing the main configuration of the lighting fixture shown in FIG. 1. [Figure 5] It is an exploded perspective view showing the end portion of the lighting fixture according to Embodiment 1. [Figure 6] It is a perspective view showing one configuration example of the lid portion shown in FIG. 5. [Figure 7] It is a five-sided view showing the lid portion shown in FIG. 6. [Figure 8] It is a side view showing the end portion of the light-transmitting cover shown in FIG. 4. [Figure 9] It is a diagram for explaining the operation of the lighting fixture according to Embodiment 1. [Figure 10] It is a side view showing the end portion of the lighting fixture according to Embodiment 2. [Figure 11] It is a diagram for explaining the operation of the lighting fixture according to Embodiment 2. [Figure 12] It is a side view showing the end portion of the lighting fixture according to Embodiment 3.

Mode for Carrying Out the Invention

[0012] The present disclosure relates to a lighting fixture including a light-transmitting portion disposed on the front side of a light source portion and a lid portion for closing an end portion of the light-transmitting portion, a lighting device using this lighting fixture, and the light-transmitting cover thereof.

[0013] Hereinafter, embodiments of the lighting fixture, the lighting device, and the light-transmitting cover according to the present disclosure will be described with reference to the drawings. In the following description, the same or corresponding components may be denoted by the same reference numerals and described, and repeated descriptions may be omitted. However, in the case of the same reference numeral, when the attached letters such as "a", "b", or "c" are different, the configurations may be different from each other.

[0014] In addition, the lighting fixture, lighting device, and light-transmitting cover according to the present disclosure are not limited to the embodiments described below, and can be variously modified without departing from the spirit of the present disclosure. Also, the lighting fixture, lighting device, and light-transmitting cover shown in the drawings are examples of the modes to which the present disclosure is applied, and the scope of application of the present disclosure is not limited by the lighting fixture, lighting device, and light-transmitting cover shown in the drawings.

[0015] In the drawings used to explain the lighting fixture, lighting device, and light-transmitting cover according to the present disclosure, the relative dimensional relationships or shapes of each component etc. may be different from the actual ones. Also, in the following description, directions, orientations, or positions may be indicated. These indications are used for convenience to facilitate understanding of the description, and do not limit the directions, orientations, and positions of the lighting fixture, lighting device, and light-transmitting cover, as well as the components etc. constituting them. Also, in the plurality of drawings used to explain the configuration of the present disclosure, for convenience of explanation, the X-axis, Y-axis, and Z-axis are shown to define the direction.

[0016] Embodiment 1. [Lighting Device 1] The configuration of the lighting device 1 of the first embodiment will be described. FIG. 1 is a perspective view showing a configuration example of the lighting device 1 according to the first embodiment. FIG. 2 is a split perspective view of the lighting device 1 shown in FIG. 1.

[0017] The lighting device 1 is installed at a position where it can illuminate the lighting space and illuminates the lighting space. The lighting space is the space where the lighting device 1 is installed, and means, for example, a space such as a living space, a warehouse, a space in a building or a public facility, a shared space such as an elevator or a corridor, or a space inside a vehicle such as a train or a ship.

[0018] The lighting device 1 comprises a fixture 2 and a light fixture 3 that can be detachably attached to the fixture 2. The lighting device 1 is mounted on a structure 9 such as a ceiling or wall with the light fixture 3 facing into the room. The structure 9 is the mounting surface to which the fixture 2 is attached. The lighting device 1 illuminates the space by emitting light from the light fixture 3 when it is turned on.

[0019] Lighting device 1 is a lighting device known as the inverted Fuji type. In the configuration example shown in Figure 1, lighting device 1, fixture 2, and luminaire 3 are all elongated. In the following description, the longitudinal direction of lighting device 1 is defined as the X-axis direction, and the direction perpendicular to the longitudinal direction and relative to the longitudinal direction is defined as the Y-axis direction. The X-axis direction is referred to as the first direction, and the Y-axis direction is referred to as the second direction. The direction perpendicular to the longitudinal and short directions of lighting device 1 is defined as the Z-axis direction. Furthermore, the side of the structure 9, such as the ceiling, to which lighting device 1 is attached is defined as the upward direction Z1, and the side opposite to the upward direction Z1, from which lighting device 1 emits light, is defined as the downward direction Z2. The downward direction Z2 is, for example, the direction of gravity.

[0020] [Device 2] Referring to Figures 1 and 2, the configuration of fixture 2 is outlined. Fixture 2 is a so-called direct-mount type lighting fixture that is directly attached to the building section 9. Fixture 2 is the part to which the luminaire 3 is attached. Fixture 2 holds the luminaire 3 attached to it and supplies power to the luminaire 3.

[0021] The device 2 can be formed into a desired shape by processing a metal sheet (sheet metal) by bending, roll forming, or pressing. Alternatively, the device 2 may be formed by extrusion molding using metal materials or by three-dimensional molding such as 3D printing. The device 2 has a device body portion 20 and a device end portion 24.

[0022] (Main body of the device 20) The main body of the fixture 20 is attached to a mounting fixture (not shown) such as a suspension bolt provided on the construction section 9 using, for example, a fastener (not shown) such as a nut. The main body of the fixture 20 has a top surface 21 and two fixture side parts, an inner side surface 22 and an outer surface 23, which are arranged to the side of the top surface 21 and form a pair.

[0023] The top surface portion 21 is formed in a long, flat shape along the first direction. A wire insertion hole (not shown) is formed in the top surface portion 21. The wire insertion hole is an opening for drawing power lines connected to an external power source such as a commercial power supply into the light fixture mounting portion 29, which will be described later.

[0024] The side sections 22 are connected to both ends of the top section 21 in the second direction, and the outer section 23 is connected to the end of the side section 22 opposite to the top section 21. The side sections 22 are provided along the side edge of the top section 21, along the first direction of the top section 21. The side sections 22 rise from the side edge of the top section 21 toward the opposite side of the construction section 9.

[0025] The outer surface portion 23 is a design part that forms the exterior of the lighting device 1 and fixture 2. The outer surface portion 23 is provided on both sides of the luminaire mounting portion 29, which will be described later, in the second direction. The ends of the outer surface portion 23 are treated with a curled shape. The outer surface portion 23 may also have the function of a reflector that reflects light emitted laterally from the luminaire 3 and distributes the light further laterally.

[0026] The luminaire mounting section 29, to which the luminaire 3 is attached, is formed by a top surface 21 positioned along the construction section 9 and a side surface 22 rising from the side edge of the top surface 21 toward the opposite side of the construction section 9.

[0027] The fixture body 20 includes a fixture-side connector 28 and a terminal block 26. The fixture-side connector 28 is a connecting spring, and two of them are attached to the top surface 21 of the fixture body 20 in pairs along the first direction. The fixture-side connector 28 connects with the luminaire-side connector 71 (see Figure 3), which is a connecting fitting, when the luminaire 3 is attached to the fixture 2. The luminaire 3 is attached to the fixture 2 by the connection of the fixture-side connector 28 and the luminaire-side connector 71. The fixture-side connector 28 engages with the luminaire-side connector 71 to support the luminaire 3.

[0028] The terminal block 26 is located on the top surface 21. The terminal block 26 is a relay device that supplies power from an external power source to the light fixture 3 by connecting the power supply wires drawn into the fixture 2 through wire insertion holes (not shown) formed in the top surface 21 to the fixture-side power supply device 27.

[0029] (Instrument end 24) The fixture ends 24, which come in pairs, are positioned at both ends of the fixture body 20 in the first direction. The fixture ends 24 are in contact with both ends of the top surface 21 and the outer surface 23. A knockout 25 is formed on the end face of the fixture end 24. The knockout 25 is a portion on the end face of the fixture end 24 that has been processed with a knockout. The knockout 25 is a portion that can be easily opened by a worker, for example, by tapping or cutting it off at the installation site of the lighting device 1. The knockout 25 is removed, for example, when pulling electrical wires into the interior of the fixture 2 from an adjacent lighting device.

[0030] [Lighting 3] Figure 3 is a perspective view of the luminaire 3 shown in Figure 1, showing the side facing the fixture 2. Figure 4 is an exploded perspective view showing the main components of the luminaire 3 shown in Figure 1. The components of the luminaire 3 are outlined below with reference to Figures 1 to 4. The luminaire 3 has a base 60, a light source 65, a light-transmitting cover 30, and a power supply 68. The luminaire 3 is sometimes referred to as a light source unit.

[0031] (Base 60) The configuration of the base 60 will now be described. The base 60 functions as a support for the power supply 68 and the light source 65. The base 60 extends from the luminaire 3 along a first direction (X-axis), which is the longitudinal direction of the luminaire 3. The base 60 has a base 61 that extends in the first direction and on which various components are arranged, and a pair of side portions 62 that are provided parallel to the base 61 along the first direction.

[0032] The base 61 has one surface 63 and the other surface 64 which is the opposite surface. The light source 65 is arranged on the one surface 63 of the base 61. The other surface 64 of the base 61 has a power supply 68, a luminaire-side power supply 69 for electrically connecting the fixture-side power supply 27 of the fixture 2 to the power supply 68, and a power supply unit 70 for supplying power from the power supply 68 to the light source 65. The power supply unit 70 has a power supply line 700 for supplying lighting power from the power supply 68 to the light source 65, and a power supply line holder 701 for holding the power supply line 700.

[0033] Furthermore, two luminaire-side connectors 71 are provided on the other surface 64 of the base 61 so as to be paired along the first direction of the base 61. The luminaire-side connectors 71 are, for example, spring retainers. The luminaire 3 is held in the fixture 2 by the connection between the fixture-side connector 28 and the luminaire-side connectors 71.

[0034] The base 60 is made of a material such as steel plate, aluminum, or magnesium. The base 60 may be made of a material that has been treated with plating or painting. The base 60 is formed using a processing method such as bending, roll forming, turret punch press processing, or extrusion processing. In this embodiment 1, the planar shape of the base 61 of the base 60 after processing is rectangular, but it may be square, or a polygon other than a quadrilateral, and is not limited to a polygon.

[0035] (Light source 65 and power supply 68) The configuration of the light source 65 will now be described. The light source 65 has an LED (Light Emitting Diode) which serves as a light-emitting element 66, and a light source substrate 67 on which the LED is mounted. The light source substrate 67 is arranged along a first direction on one side 63 of the base 60. The light-emitting element 66 is lit by the ignition power supplied from the power supply 68. The light-emitting element 66 is not limited to an LED, but may also be other light-emitting elements such as a laser or an organic EL (Electro Luminescence).

[0036] In the configuration example shown in Figure 4, the shape of the light source substrate 67 is elongated, but it may also be square. The light source substrate 67 has two sides; the light-emitting element 66 and surface-mount components (not shown) are arranged on one side, and a wiring pattern (not shown) connected to the light-emitting element 66 or surface-mount components (not shown) is arranged on the opposite side. The wiring pattern (not shown) may also be arranged on one side of the light source substrate 67.

[0037] One method for attaching the light source substrate 67 to the base 60 is to mechanically hold the light source substrate in place using a gripping piece formed by cutting and bending a part of the base 60. Another attachment method involves bonding and fixing the light source substrate 67 to the base 60 using a silicone adhesive or the like, or fixing the light source substrate 67 to the base 60 using a separate component.

[0038] The configuration of the power supply 68 will now be described. The power supply 68 generates lighting power to light up the light-emitting element 66 using external power supplied from an external power source via the device 2. The power supply 68 supplies lighting power to the light-emitting element 66 mounted on the light source substrate 67 via the power supply line 700.

[0039] General-purpose components can be used for the light source substrate 67 and the power supply substrate (not shown). The materials for the light source substrate 67 and the power supply substrate (not shown) could include, for example, paper phenol, glass epoxy (FR4), or composite (CEM) metal core.

[0040] (Translucent cover 30) Figure 5 is an exploded perspective view showing the end of the lamp 3 according to Embodiment 1. Figure 6 is a perspective view showing one example of the configuration of the cover portion 51 shown in Figure 5. Figure 6(a) is a view of the cover portion 51 as seen from the side to which the cover body portion 31 is attached, and Figure 6(b) is a view of the cover portion 51 shown in Figure 6(a) as seen from the opposite side. Figure 7 is a five-view drawing of the cover portion 51 shown in Figure 6. Figure 7(a) is a bottom view of the cover portion 51 shown in Figure 5 as seen from below Z2, Figure 7(b) is a rear view of the cover portion 51 as seen from the side to which the cover body portion 31 is attached, and Figure 7(c) is a top view of the cover portion 51 shown in Figure 5 as seen from above Z1. Figure 7(d) is a front view of the cover portion 51 shown in Figure 7(b) as seen from the opposite side, and Figure 7(e) is a side view of the cover portion 51 shown in Figure 5 as seen along the Y-axis direction.

[0041] Figure 8 is a side view showing the end of the translucent cover 30 shown in Figure 4. Figure 8(a) is a view of the translucent cover 30 shown in Figure 4, cut parallel to the YZ plane, and looking from the cut surface toward one end face in the first direction (X axis) of the translucent cover 30. Figure 8(b) is an enlarged view of the area A1 enclosed by the dashed line frame shown in Figure 8(a). In Figure 8(a), the translucent cover 30 shows the outer circumference shape of the base 60 shown in Figure 4 with a dashed line. The configuration of the translucent cover 30 will be explained with reference to Figures 4 to 8.

[0042] As shown in Figure 4, the light-transmitting cover 30 has a cover body portion 31, which is the main body of the light-transmitting cover 30, and cover portions 51 that are attached to each of the first ends of the cover body portion 31 as cover ends. The light-transmitting cover 30 is attached to the base 60 so as to cover the light source 65. The light-transmitting cover 30 also functions as an outer shell that protects the light source 65. The cover body portion 31 has a light-transmitting portion 32, a mounting portion 36, and a connecting portion 35.

[0043] The translucent cover 30 is formed using a translucent resin material. The resin material is, for example, a general-purpose engineering plastic such as polycarbonate (PC) or acrylic (PMMA). As a processing method for the translucent cover 30, methods such as extrusion molding or injection molding can be used. In this embodiment 1, the cover body portion 31 is formed by extrusion molding, and the lid portion 51 is formed by injection molding.

[0044] The cover body 31 may be transparent, or it may be a diffusion type with a diffusion material added. Alternatively, the cover body 31 may be colorless, or it may be milky white with a diffusion material added. Or, the cover body 31 may be colored with a pigment such as yellow for insect-repellent purposes. The pigment material may be a dye or pigment.

[0045] The surface of the cover body 31 may be coated with a film-like protective layer to prevent dust from adhering to the surface. Furthermore, the surface of the cover body 31 may be coated with a fluorine-based material to reduce the occurrence of squeaking noises (stick-slip phenomenon) caused by friction with other parts that come into contact with the mounting portion 36. Additionally, the cover body 31 may be post-processed to provide notches or holes to facilitate the attachment of the lid portion 51, base 60, or other parts.

[0046] The light-transmitting portion 32 extends along a first direction such that its inner surface 41 faces one surface 63 of the base 60. The light-transmitting portion 32 has a continuous semicircular cross-sectional shape along the first direction. The cross-sectional shape of the light-transmitting portion 32 is not limited to a semicircle; it may also be U-shaped or trough-shaped. Furthermore, the cross-sectional shape of the light-transmitting portion 32 that continues along the first direction may be square or cylindrical, etc. In other words, the light-transmitting portion 32 facing the light-emitting element 66 is formed by a curved surface or a flat surface.

[0047] The cross-sectional shape of the light-transmitting portion 32 may be curved to uniformly diffuse the light emitted from the light-emitting element 66 into the illuminated space. Alternatively, the outer surface 42 of the light-transmitting portion 32 may be given a convex or concave prism shape to concentrate the light into a part of the illuminated space. The outer surface 42 of the light-transmitting portion 32 may be given a textured finish to make it difficult for fingerprints and the like to adhere to the outer surface 42.

[0048] The mounting portion 36 has the function of attaching the light-transmitting cover 30 to the base 60. A pair of mounting portions 36 extend laterally from the light-transmitting portion 32 along a first direction. Each of the pair of mounting portions 36 has an L-shaped cross-section that continues along the first direction. When the light-transmitting cover 30 is attached to the base 60, the pair of mounting portions 36 are positioned laterally from the base 60 so as to embrace the base 61 and the pair of side portions 62 of the base 60. The mounting portion 36 has a support portion 37 that supports the base 61 of the base 60 and an engaging portion 38 that engages with the tip of the side portion 62 of the base 60.

[0049] The connecting portion 35 connects the light-transmitting portion 32 and the mounting portion 36, and is integrated with the light-transmitting portion 32 and the mounting portion 36. A pair of connecting portions 35 are provided so as to be parallel along the first direction. Specifically, the pair of connecting portions 35 connect the two ends 34 in the second direction of the light-transmitting portion 32 to the pair of engaging portions 38.

[0050] The pair of support portions 37 are arranged parallel to each other along the first direction. Each of the pair of support portions 37 is formed to extend in the second direction from the engaging portion 38 toward the center of the cover body portion 31.

[0051] A pair of engaging portions 38 are provided so as to be parallel to each other along the first direction. Each of the pair of engaging portions 38 extends upward (Z1) perpendicular to the second direction, and its tip is bent in an inverted U shape. The side portion 62 of the base 60 abuts against the engaging portion 38.

[0052] As shown in Figure 8, the cover body 31 has a lateral space 40 that is enclosed on three sides by the second-direction end 34 of the light-transmitting portion 32, the engaging portion 38 of the mounting portion 36, and the connecting portion 35. The second-direction end 34 of the light-transmitting portion 32 is the outer wall of the lateral space 40, the engaging portion 38 of the mounting portion 36 is the inner wall of the lateral space 40, and the connecting portion 35 is the bottom wall of the lateral space 40.

[0053] In this embodiment 1, the lateral space 40 shown in Figure 8 is formed continuously along the first direction. A pair of lateral spaces 40 are formed in a groove shape so as to be parallel along the first direction. Each of the pair of lateral spaces 40 is formed between the light-transmitting portion 32 and the mounting portion 36 in the second direction. It is desirable that the lateral space 40 be formed in a region through which primary light from the light-emitting element 66 does not pass.

[0054] (Lid part 51) The structure of the lid portion 51 will be described with reference to Figures 5 to 8. In this embodiment 1, the lid portion 51 is formed using the same material as the cover body portion 31, but it may be formed using a different material. Examples of the different material include engineering plastics, ceramics, or metals with different optical properties than those of the cover body portion 31.

[0055] The lid portion 51 is attached to and fixed to the end of the cover body portion 31. The lid portion 51 has an end wall portion 52 and an upright portion 53 provided on one side of the end wall portion 52. The end wall portion 52 is sometimes referred to as the end plate portion. The upright portion 53 is sometimes referred to as the rib.

[0056] Methods for fixing the lid portion 51 to the cover body portion 31 include welding by heating, ultrasonic waves, or organic solvents, or adhesive fixing with adhesive members. The method for fixing the lid portion 51 to the cover body portion 31 may be mechanical, rather than welding or adhesive fixing. A detailed explanation is omitted, but for example, a mechanical fixing method using an engagement mechanism provided in advance on the cover body portion 31 and the lid portion 51, or a mechanical fixing method using an engagement mechanism provided in advance on the base 60 and the lid portion 51 may be used.

[0057] As shown in Figures 6 and 7, the end wall portion 52 has a plate-like structure. The end wall portion 52 covers one end face of the light-transmitting portion 32 in the first direction. The outer shape of the end wall portion 52 has a portion of the cover body portion 31 that is equivalent in shape to the cross-section of the light-transmitting portion 32 parallel to the YZ plane. The two end wall portions 52 cover both end faces of the cover body portion 31 and are shaped to close the space surrounded by the light-transmitting portion 32 and the support portion 37.

[0058] As shown in Figure 5, the upright portion 53 extends toward the other end of the cover body 31 along the first direction when the lid portion 51 is attached to one end of the cover body 31. The upright portion 53 is formed to face the inner surface 41 of the light-transmitting portion 32, which is the inner surface of the cover body 31, when the lid portion 51 is attached to the cover body 31. The upright portion 53 has a shape that extends in the first direction along the cross-sectional shape of the light-transmitting portion 32 parallel to the YZ plane.

[0059] When the lid portion 51 is attached to the cover body portion 31, the upright portion 53 overlaps with a part of the cover body portion 31 in the first direction. The amount of overlap between the upright portion 53 and the cover body portion 31 depends on the length of the upright portion 53 in the first direction. The amount of overlap between the upright portion 53 and the cover body portion 31 is the length of overlap between the upright portion 53 and the cover body portion 31 in the first direction, or the area of ​​overlap between the upright portion 53 and the cover body portion 31. The longer the length of the upright portion 53 in the first direction, the greater the amount of overlap between the upright portion 53 and the cover body portion 31.

[0060] When the lid portion 51 is attached to the cover body portion 31, if the cover body portion 31 is deformed along the YZ plane, each of the ends 54 of the upright portion 53 housed in the lateral space 40 will come into contact with the end 34 of the light-transmitting portion 32. As a result, the deformation of the cover body portion 31 is corrected, a gap is formed between the upright portion 53 of the lid portion 51 and the light-transmitting portion 32, and the light-transmitting portion 32 is positioned so as not to come into contact with the portion of the upright portion 53 excluding the ends 54. Consequently, damage to the light-transmitting portion 32 due to deformation of the light-transmitting cover 30 can be suppressed, improving reliability. In addition, air can flow more easily between the upright portion 53 of the lid portion 51 and the light-transmitting portion 32, efficiently dissipating heat accumulated inside the light-transmitting cover 30 and extending the lifespan of the light-emitting element 66.

[0061] In this embodiment 1, the translucent cover 30 is configured such that the spacing dimension D1, which is the distance between the inner surface 41 of the translucent portion 32 and the outer surface of the upright portion 53, is smaller than the thickness dimension of the translucent portion 32. Specifically, the spacing dimension D1 shown in Figure 8 is preferably in the range of 0.10 mm to 0.50 mm.

[0062] The minimum value of the spacing dimension D1 between the inner surface 41 of the light-transmitting portion 32 and the outer surface of the upright portion 53 is determined considering the molding accuracy of the cover body portion 31 and the lid portion 51, as well as the assembly accuracy of the lamp 3. The maximum value of the spacing dimension D1 between the inner surface 41 of the light-transmitting portion 32 and the outer surface of the upright portion 53 is selected to be such that, even when a stress that causes deformation is applied to the cover body portion 31, the deformation is limited to an extent that does not cause damage such as cracks or fractures to the cover body portion 31.

[0063] Furthermore, when an adhesive portion is provided on the end face of the light-transmitting portion 32 in the first direction, a value is selected that prevents the adhesive portion between the lid portion 51 and the cover body portion 31 from peeling off even when a stress that causes deformation is applied to the cover body portion 31. When a welded portion is provided on the end face of the light-transmitting portion 32 in the first direction, a value is selected that prevents the welded portion between the lid portion 51 and the cover body portion 31 from shearing even when a stress that causes deformation is applied to the cover body portion 31.

[0064] Each of the two ends 54 in the second direction of the upright portion 53 abuts against the engaging portion 38 of the cover body portion 31. When the lid portion 51 is attached to the cover body portion 31, both ends 54 of the upright portion 53 are housed in the lateral space 40 of the cover body portion 31. The lateral space 40 functions as a housing space in which both ends 54 of the upright portion 53 are housed when the lid portion 51 is attached to the cover body portion 31.

[0065] Furthermore, for example, if the cover body 31 is manufactured by extrusion molding, the ends 34 of the cover body 31 may deform to spread outward along the second direction. In this case, each end 54 of the upright portion 53 abuts against the engaging portion 38 of the cover body 31, which is the inner wall portion of the lateral space 40, and presses the engaging portion 38 inward along the second direction. Each end 54 of the upright portion 53 receives a reactive force from each engaging portion 38 due to the pressing force. Each end 54 of the upright portion 53 presses each engaging portion 38 by receiving a reactive force from each engaging portion 38. The pair of engaging portions 38 move closer to each other as they are pressed against both ends 54 of the upright portion 53, and the deformation of the ends 34 of the cover body 31 is corrected. In other words, both ends 54 of the upright portion 53 function as correcting portions that correct the ends 34 of the cover body 31. Thus, deformation such that the end portion 34 of the cover body 31 spreads outward along the second direction is corrected by attaching the lid portion 51 to the cover body 31.

[0066] In this embodiment 1, the configuration described is one in which the upright portion 53 is continuously provided along a cross-sectional shape parallel to the YZ plane of the light-transmitting portion 32, so as to face the inner surface 41 of the light-transmitting portion 32, which is the inner surface of the cover body portion 31. However, the configuration is not limited to this. For example, the upright portion 53 may be formed intermittently along a cross-sectional shape parallel to the YZ plane of the light-transmitting portion 32. Also, the upright portion 53 may have both ends 54 that function as straightening portions, which are formed separately from the main body of the upright portion 53.

[0067] Next, an example of the operation of the lamp 3 of this embodiment 1 will be described. When an operator fixes the lid 51 to the end of the cover body 31 by welding as described above, it is necessary to maintain the state in which the lid 51 is attached to the cover body 31 from the preparation for welding until the welding is completed, so that the lid 51 does not fall off the cover body 31.

[0068] For example, it is conceivable that an operator temporarily fastens the lid portion 51 to the cover body portion 31 while attaching the translucent cover 30 to the welding device. During this time, the lid portion 51 must be held in place by the cover body portion 31. If the lid portion 51 is not held in place by the cover body portion 31, it will fall off before being attached to the welding device. Therefore, a separate configuration with a holding function is required to hold the lid portion 51 in place by the cover body portion 31 until it is welded and fixed to the cover body portion 31.

[0069] In contrast, in this embodiment 1, the upright portion 53 not only functions as the straightening portion described above, but also functions as a retaining portion for holding the lid portion 51 to the cover body portion 31. Therefore, there is no need to separately provide a configuration with a retaining function for holding the lid portion 51 to the cover body portion 31 until the lid portion 51 is welded and fixed to the cover body portion 31.

[0070] Next, another example of the operation of the luminaire 3 in this embodiment 1 will be described. Figure 9 is a diagram illustrating the operation of the luminaire according to embodiment 1. Figure 9(a) is a side view of the BB portion shown in Figure 9(b). Figure 9(c) is a side view of the end of the cover body portion 31.

[0071] The end portion 34 of the cover body 31 manufactured by extrusion molding may deform to spread outward along the second direction, as shown in Figures 9(b) and 9(c). If W1 is the distance between the pair of engaging portions 38 of the undeformed cover body 31, and W2 is the distance between the pair of engaging portions 38 of the cover body 31 that has deformed to spread outward along the second direction, then the relationship W2 ≥ W1 holds.

[0072] In this case, as shown in Figure 8, both ends 54 of the upright portion 53 abut against the engaging portion 38 of the cover body portion 31, which is the inner wall portion of the lateral space 40, and press the engaging portion 38 inward along the second direction. The pair of engaging portions 38 move closer to each other as they are pressed against by both ends 54 of the upright portion 53, and the deformation of the ends 34 of the cover body portion 31 is corrected. Thus, the stress that corrects the deformation to suppress the spreading shown in Figure 9 acts as a holding force for the lid portion 51 to be held by the cover body portion 31. The spacing dimension D1 shown in Figure 8 becomes longer than when the cover body portion 31 is deformed to spread outward along the second direction, and approaches the spacing dimension D1 when the cover body portion 31 is not deformed.

[0073] In this example, the upright portion 53 functions as a corrective portion for the purpose of correcting deformation of the end portion 34 of the cover body portion 31. Furthermore, the upright portion 53 functions as a retaining portion for the purpose of holding the lid portion 51 to the cover body portion 31. Thus, the upright portion 53 combines multiple functions.

[0074] In this first embodiment, as shown in Figure 8, the lid portion 51 is provided with a pair of end portions 54 in the second direction on the upright portion 53. The distance between the pair of end portions 54 in the second direction is greater than the distance between the pair of engaging portions 38, which are the inner walls of the lateral space 40. Therefore, when the pair of engaging portions 38 try to spread outward along the second direction, the pair of end portions 54 clamp the pair of engaging portions 38 from the outside along the second direction toward the center of the light-transmitting portion 32. As a result, the pair of end portions 54 are held by the end portions 34 of the cover body portion 31, applying stress to the cover body portion 31 via the pair of engaging portions 38. In this way, the lid portion 51 is held by the cover body portion 31. The lid portion 51 and the cover body portion 31 are in a relationship where they hold each other.

[0075] The light-transmitting cover 30 of this embodiment 1 has a cover body 31 and a lid 51. The cover body 31 includes a light-transmitting portion 32 extending along a first direction such that its inner surface 41 faces one surface of the base 60, a pair of mounting portions 36 provided on both sides of the base 60 along the first direction, and a pair of connecting portions 35 on both sides of the base 60 that connect the end 34 of the light-transmitting portion 32 in a second direction to the mounting portion 36. The cover body 31 has a pair of lateral spaces 40 surrounded by the light-transmitting portion 32, the mounting portion 36, and the connecting portion 35. The lid 51 includes an end wall portion 52 that covers one end surface of the light-transmitting portion 32 in a first direction, and an upright portion 53 that is erected from the end wall portion 52 toward the other end surface in a first direction so as to face the inner surface 41 of the light-transmitting portion 32. The lid portion 51 is attached to the end portion 31 in the first direction of the cover body portion 31, with each of the second-direction end portions 54 of the upright portion 53 housed in the lateral space 40. When the lid portion 51 is attached to the cover body portion 31, the light-transmitting portion 32 is positioned so as not to be in contact with the upright portion 53 except for the end portions 54.

[0076] According to this embodiment 1, for example, if the cover body 31 is deformed such that both ends 34 of the light-transmitting portion 32 spread outward along the second direction, when the lid 51 is attached to the cover body 31, each of the ends 54 of the upright portion 53 is housed in the lateral space 40 and abuts against the respective engaging portions 38 of the cover body 31, which are the inner walls of the lateral space 40. Then, each end 54 of the upright portion 53 presses the respective engaging portions 38 of the cover body 31 inward along the second direction. As a result, the pair of engaging portions 38 move closer to each other by being pressed by both ends 54a of the upright portion 53a, and the deformation of the cover body 31 is corrected. As a result, the parts of the upright portion 53 other than the ends 54 maintain a distance from the light-transmitting portion 32 of the cover body 31 and do not come into contact with the light-transmitting portion 32. In other words, a gap is formed between the upright portion 53 of the lid 51 and the light-transmitting portion 32. Thus, even if the light-transmitting portion 32 of the cover body 31 is deformed along the YZ plane, the deformation of the cover body 31 is corrected by attaching the lid portion 51, improving the reliability of the light-transmitting cover 30. In addition, air can flow more easily between the upright portion 53 of the lid portion 51 and the light-transmitting portion 32, efficiently dissipating the heat accumulated inside the light-transmitting cover 30 and extending the lifespan of the light-emitting element 66.

[0077] Damage to the translucent cover can lead to a decrease in aesthetic appeal and optical performance. However, according to this embodiment 1, damage to the translucent cover 30 is suppressed, thus preventing a decrease in aesthetic appeal and optical performance. Furthermore, according to this embodiment 1, since damage to the translucent cover 30 is suppressed, the lid portion 51 is prevented from falling off the end of the cover body portion 31.

[0078] Furthermore, this embodiment 1 offers the following advantages in the manufacturing of the light-transmitting cover 30, the luminaire 3, and the lighting device 1. According to this embodiment 1, the lid portion 51 is provided with upright portions 53 whose ends 54 function as corrective portions that correct the deformation of the cover body portion 31. Therefore, if the cover body portion 31 is deformed to spread outward in the second direction, when a worker attaches the lid portion 51 to the cover body portion 31, the ends 54 of the upright portions 53 correct the outward spreading deformation. In this way, the ends 54 of the upright portions 53 correct the deformation of the cover body portion 31 by pressing on the portion of the cover body portion 31 other than the light-transmitting portion 32. Therefore, the workability and mass production efficiency are improved in the manufacturing of the light-transmitting cover 30, the luminaire 3, and the lighting device 1. The advantages of this embodiment 1 will be described in detail below, in comparison with a conventional lighting fixture, for example, a lighting fixture disclosed in Patent Document 1.

[0079] In conventional lighting fixture manufacturing, it is necessary to attach the lid to the edge of the cover by applying a force sufficient to elastically deform the edge of the cover through the insertion part, which may reduce work efficiency and mass production efficiency. In contrast, according to this embodiment 1, when fixing the lid 51 to the cover body 31, it is not necessary to elastically deform the cover body 31, thus suppressing a decrease in work efficiency and mass production efficiency.

[0080] In conventional lighting fixtures, the process of attaching the lid to the edge of the cover involves elastically deforming the front portion of the cover's edge. This process can cause scratches on the front portion of the cover due to friction with the lid. In this case, the aesthetic appearance of the cover deteriorates.

[0081] In contrast, according to this embodiment 1, when fixing the lid portion 51 to the cover body portion 31, it is not necessary to elastically deform the cover body portion 31. Therefore, friction between the light-transmitting portion 32 and the lid portion 51 is suppressed, and scratches on the light-transmitting portion 32 are suppressed. As a result, the design of the light-transmitting cover 30 is not impaired.

[0082] In conventional lighting fixtures, when the insertion portion of the lid and the front of the cover are in contact, a large overlap area between the two can cause a creaking sound (stick-slip phenomenon) due to differences in expansion or contraction. This creaking sound may cause discomfort or anxiety to the user.

[0083] In contrast, according to this embodiment 1, since both ends 54 of the upright portion 53 abut against the end 34 of the light-transmitting portion 32, the deformation of the cover body portion 31 is corrected. As a result, the generation of creaking noises due to differences in the amount of expansion or contraction of the cover body portion 31 can be suppressed.

[0084] In conventional lighting fixtures, when the cover is formed by extrusion molding, the edges of the cover may deform due to the release of residual stress or heating during cutting. In contrast, according to this embodiment 1, since both ends 54 of the upright portion 53 abut against the ends 34 of the light-transmitting portion 32, the deformation of the cover body portion 31 is corrected.

[0085] In conventional lighting fixtures, the insertion portion of the lid and the front of the cover are in contact without the use of adhesive, preventing insects from entering the cover. Therefore, the insertion portion is made longer in the longitudinal direction of the cover. As a result, when the light-emitting element is lit, the shadow of the insertion portion is easily emphasized, and when the light-emitting element is off, the insertion portion is easily visible through the light. Consequently, the aesthetic appearance deteriorates in both the lit and unlit states. This problem becomes more pronounced as the overlapping area between the insertion portion of the lid and the front of the cover increases.

[0086] In contrast, according to this embodiment 1, welding or adhesive fixing can be used as the method of fixing the cover body 31 and the lid 51, and there is no need to make the upright portion 53 longer than necessary. Therefore, it is possible to suppress the deterioration of the design of the translucent cover 30 due to the upright portion 53.

[0087] In conventional lighting fixtures, the above-mentioned problems can be solved by adopting a method of bonding or welding the lid to the end face of the cover without providing an insertion part in the lid. However, when manufacturing or installing lighting fixtures, applying stress that causes deformation to the cover may cause the bonded part between the lid and the cover to peel off, or the welded part between the lid and the cover to shear. In this case, the lid may come off the cover.

[0088] In contrast, according to this embodiment 1, since both ends 54 of the upright portion 53 abut against the end 34 of the light-transmitting portion 32, the deformation of the cover body portion 31 is corrected. As a result, peeling of the adhesive portion between the lid portion 51 and the cover body portion 31 is suppressed, and shearing of the welded portion between the lid portion 51 and the cover body portion 31 is suppressed.

[0089] Embodiment 2. The configuration of the luminaire 3 of this second embodiment will now be described. Figure 10 is a side view showing the end of the luminaire 3 according to the second embodiment. Figure 10(a) is a view of the light-transmitting cover 30 when it is cut parallel to the YZ plane, and one end face in the first direction of the light-transmitting cover 30 is seen from the cut surface. Figure 10(b) is an enlarged view of the area A2 enclosed by the dashed frame shown in Figure 10(a).

[0090] In the lid portion 51a of this second embodiment, each of the two ends 54a of the upright portion 53a in the second direction abuts against the end 34 of the light-transmitting portion 32, which is located outward along the second direction from the center of the lid portion 51a. When the lid portion 51b is attached to the cover body portion 31, the end 54a is housed in the lateral space 40 of the cover body portion 31. The distance dimension D2 between the inner surface 41 of the light-transmitting portion 32 and the outer surface of the upright portion 53a is preferably in the range of 0.10 mm to 0.50 mm, similar to the distance dimension D1 described in the first embodiment.

[0091] Next, the operation of the luminaire 3 of this second embodiment will be explained. Figure 11 is a diagram illustrating the operation of the luminaire according to the second embodiment. Figure 11(a) is a side view of the CC portion shown in Figure 11(b). Figure 11(c) is a side view of the end of the cover body portion 31.

[0092] When the cover body 31 is manufactured by extrusion molding, the end portion 54a of the cover body 31 may deform to narrow inward along the second direction, as shown in Figure 11(c). Let W1 be the distance between the pair of engaging portions 38 of the undeformed cover body 31, and W6 be the distance between both ends 34 of the undeformed cover body 31. If W7 is the distance between both ends 34 of the cover body 31 that has deformed to narrow inward along the second direction, then the distances W1, W6, and W7 satisfy the relationship W6≧W7>W1.

[0093] In this case, as shown in Figure 10, both ends 54a of the upright portion 53a abut against both ends 34 of the translucent portion 32 of the cover body portion 31, which is the outer wall portion of the lateral space 40, and press both ends 34 of the translucent portion 32 outward along the second direction.

[0094] The pair of engaging portions 38 are pressed against both ends 54a of the upright portion 53a, causing them to move away from each other, and the deformation of the cover body portion 31 is corrected. In other words, both ends 54a of the upright portion 53a function as correcting portions that correct the position of both ends 34 of the cover body portion 31. The spacing dimension D2 shown in Figure 10 becomes shorter than when the cover body portion 31 is deformed to narrow inward along the second direction, and approaches the spacing dimension D2 when the cover body portion 31 is not deformed.

[0095] According to this second embodiment, for example, if the cover body 31 is deformed such that both ends 34 of the light-transmitting portion 32 narrow inward along the second direction, then when the lid 51 is attached to the cover body 31, each of the ends 54 of the upright portion 53 is housed in the lateral space 40 and comes into contact with each end 34 of the light-transmitting portion 32, which is the outer wall of the lateral space 40. Then, each end 54a of the upright portion 53a presses each end 34 of the light-transmitting portion 32 outward along the second direction. As a result, the pair of engaging portions 38 move away from each other by being pressed by both ends 54a of the upright portion 53a, and the deformation of the cover body 31 is corrected. As a result, the distance between the inner surface 41 of the light-transmitting portion 32 and the upright portion 53 of the lid portion 51 becomes shorter, approaching the spacing dimension D2 when the cover body portion 31 is not deformed, and the state in which the light-transmitting portion 32 and the upright portion 53 do not come into contact is maintained.

[0096] Embodiment 3. The configuration of the luminaire 3 of this third embodiment will now be described. Figure 12 is a side view showing the end of the luminaire 3 according to the third embodiment. Figure 12(a) shows the luminaire 3 of this third embodiment in the area A1 enclosed by the dashed frame shown in Figure 8(a).

[0097] In the lid portion 51b of this third embodiment, each of the two ends 54b of the upright portion 53b in the second direction is provided with a projection 55 on its outer surface, which is the surface in the direction away from the center of the lid portion 51b in the second direction. Figure 12(a) shows the projection 55 provided on one end 54b, but the other end 54b is also provided with a projection 55. Each projection 55 is formed to protrude outward from the end 54b along the second direction. The two ends 54b of the upright portion 53b in the second direction are housed in the lateral space 40 of the cover body portion 31 when the lid portion 51b is attached to the cover body portion 31.

[0098] Next, the operation of the lamp 3 of this third embodiment will be explained with reference to Figure 12(a).

[0099] When the cover body portion 31 is manufactured by extrusion molding, the ends 34 of the cover body portion 31 may deform to spread outward along the second direction. In this case, each end 54b of the upright portion 53b abuts against each engaging portion 38 of the cover body portion 31, which is the inner wall portion of the lateral space 40, and presses each engaging portion 38 inward along the second direction. Each end 54b of the upright portion 53b receives a reactive force from each engaging portion 38 due to the pressing force. Each end 54b of the upright portion 53b presses each engaging portion 38 by receiving a reactive force from each engaging portion 38.

[0100] Furthermore, when the cover body portion 31 is manufactured by extrusion molding, the ends 34 of the cover body portion 31 may deform to narrow inward along the second direction. In this case, the protrusions 55 connected to each end 54b of the upright portion 53b abut against each end 34 of the translucent portion 32, which is the outer wall portion of the lateral space 40, and press each end 34 of the translucent portion 32 outward along the second direction. Each protrusion 55 receives a reactive force from each end 34 of the translucent portion 32 due to the pressing force. Each end 54b of the upright portion 53b presses each end 34 of the translucent portion 32 by receiving a reactive force from each end 34 of the translucent portion 32 via each protrusion 55.

[0101] The ends 34 of the light-transmitting portion 32 are pressed inward by the ends 54b of the pair of upright portions 53b, causing them to move closer together. Conversely, the ends 34 of the light-transmitting portion 32 are pressed outward by the pair of protrusions 55, causing them to move further apart from each other, thereby correcting the deformation of the cover body portion 31. In other words, the ends 54b of the upright portions 53b function as correctors that correct the position of the ends 34 of the cover body portion 31 and correct the deformation of the cover body portion 31.

[0102] In this third embodiment, the pair of protrusions 55 are configured to protrude from both ends 54b of the upright portion 53b toward the outer wall portion of the lateral space 40 along the second direction. Therefore, when both ends 34 of the cover body portion 31 are deformed to spread outward along the second direction, the pair of ends 54b of the upright portion 53b receive a resistive force from the engaging portion 38 of the cover body portion 31, correcting the deformation to suppress this narrowing. Similarly, when the end portion 34 of the cover body portion 31 is deformed to narrow inward along the second direction, the pair of ends 54b of the upright portion 53b receive a resistive force from the engaging portion 38 via the pair of protrusions 55, correcting the deformation to suppress this narrowing. Furthermore, the stress that corrects these deformations acts as a holding force to keep the lid portion 51b attached to the cover body portion 31. When the end portion 34 of the cover body 31 is deformed to spread outward along the second direction, or to narrow inward, this occurs, for example, when the cover body 31 is manufactured by extrusion molding.

[0103] According to this third embodiment, the lid portion 51b provides a holding function between both the inner wall portion and the outer wall portion of the lateral space 40. Therefore, the lid portion 51b can hold the cover body portion 31 more securely, even if the end portion 34 of the cover body portion 31 is deformed.

[0104] (Variation 1) The configuration of the lamp 3 in Modification 1 of this Embodiment 3 will now be described. Figure 12(b) is a side view showing the end of the lamp 3 according to Modification 1. Figure 12(b) is a diagram showing the lamp 3 of Modification 1 of this Embodiment 3 in the area A1 enclosed by the dashed frame shown in Figure 8(a).

[0105] In the lid portion 51c of this modified example 1, each of the two ends 54c of the upright portion 53c in the second direction is provided with a projection 55c on the inner surface which is the surface in the direction approaching the center of the lid portion 51c in the second direction. Figure 12(b) shows the projection 55c provided on one end 54c, but the other end 54c is also provided with a projection 55. Each projection 55c is formed to project inward from the end 54c along the second direction. The two ends 54c of the upright portion 53c in the second direction are housed in the lateral space 40 of the cover body portion 31 when the lid portion 51c is attached to the cover body portion 31.

[0106] Next, the operation of the lamp 3 in this modified example 1 will be explained with reference to Figure 12(b).

[0107] When the cover body portion 31 is manufactured by extrusion molding, the ends 34 of the cover body portion 31 may deform to narrow inward along the second direction. In this case, each end 54c of the upright portion 53c abuts against each end 34 of the translucent portion 32 of the cover body portion 31, which is the outer wall portion of the lateral space 40, and presses each end 34 of the translucent portion 32 outward along the second direction. Each end 54c of the upright portion 53c receives a reactive force from each end 34 of the translucent portion 32 due to the reactive force received from each end 34 of the translucent portion 32, and abuts against each end 34 of the translucent portion 32 and presses each end 34 of the translucent portion 32 outward along the second direction.

[0108] Furthermore, when the cover body portion 31 is manufactured by extrusion molding, the end portion 34 of the cover body portion 31 may deform so as to spread outward along the second direction. In this case, each protruding portion 55c connected to each end portion 54c of the upright portion 53c abuts against each engaging portion 38 of the cover body portion 31, which is the inner wall portion of the lateral space 40, and presses each engaging portion 38 inward along the second direction. Each protruding portion 55c receives a reactive force from each engaging portion 38 of the cover body portion 31 due to the pressing force. Each end portion 54c of the upright portion 53c presses each engaging portion 38 by receiving a reactive force from each engaging portion 38 via each protruding portion 55c.

[0109] The ends 34 of the light-transmitting portion 32 are pressed inward by the ends 54b of the pair of upright portions 53b, causing them to move closer together. Conversely, the ends 34 of the light-transmitting portion 32 are pressed outward by the pair of ends 54c, causing them to move further apart, thereby correcting the deformation of the cover body portion 31. In other words, the ends 54c of the upright portions 53c function as correctors that correct the position of the ends 34 of the cover body portion 31 and correct the deformation of the cover body portion 31.

[0110] In this modified example 1, the pair of protrusions 55c are configured to protrude from both ends 54c of the upright portion 53c toward the outer wall portion of the lateral space 40 along the second direction. Therefore, when both ends 34 of the cover body portion 31 are deformed to narrow inward along the second direction, the pair of ends 54c of the upright portion 53c receive a resistive force from both ends 34 of the cover body portion 31, correcting the deformation to suppress this narrowing. When the end portion 34 of the cover body portion 31 is deformed to spread outward along the second direction, the pair of ends 54c of the upright portion 53c receive a resistive force from the engaging portion 38 via the pair of protrusions 55c, correcting the deformation to suppress this spreading. Furthermore, the stress that corrects these deformations acts as a holding force for the lid portion 51c to be held by the cover body portion 31. When the end portion 34 of the cover body 31 is deformed to narrow inward along the second direction, or deformed to widen outward, for example, when the cover body 31 is manufactured by extrusion molding.

[0111] According to this modified example 1, the lid portion 51c provides a holding function between both the inner and outer walls of the lateral space 40. Therefore, the lid portion 51c can hold the cover body portion 31 more securely, even if the end portion 34 of the cover body portion 31 is deformed.

[0112] (Modification 2) The configuration of the lamp 3 in Modification 2 of this Embodiment 3 will now be described. Figure 12(c) is a side view showing the end of the lamp 3 according to Modification 2. Figure 12(c) is a diagram showing the lamp 3 of Modification 2 of this Embodiment 3 in relation to the area A1 enclosed by the dashed frame shown in Figure 8(a).

[0113] In the lid portion 51d of this modified example 2, each of the two ends 54d in the second direction of the upright portion 53d is provided with a projection 55d on the inner surface and outer surface of the end 54d in the second direction. Figure 12(c) shows two projections 55d provided on one end 54d, but the other end 54d is also provided with two projections 55d. Each end 54d has a projection 55d formed to project outward along the second direction from the end 54d, and a projection 55d formed to project inward along the second direction from the end 54d. The two ends 54d in the second direction of the upright portion 53c are housed in the lateral space 40 of the cover body portion 31 when the lid portion 51c is attached to the cover body portion 31.

[0114] Next, the operation of the lamp 3 in this modified example 2 will be explained with reference to Figure 12(c).

[0115] When the cover body 31 is manufactured by extrusion molding, the end portion 34 of the cover body 31 may deform to spread outward along the second direction. In this case, one of the two protrusions 55d connected to each end portion 54d of the upright portion 53d, the inner one, abuts against the engaging portion 38 of the cover body 31 and presses each engaging portion 38 inward along the second direction. The protrusion 55d abutting against the engaging portion 38 receives a reactive force from the engaging portion 38 due to the pressing force. Each end portion 54d of the upright portion 53d presses against each engaging portion 38 by receiving a reactive force from each engaging portion 38 via the protrusion 55d abutting against each engaging portion 38.

[0116] Furthermore, if the cover body portion 31 is manufactured by extrusion molding, the ends 34 of the cover body portion 31 may deform so as to narrow inward along the second direction. In this case, of the two protrusions 55d connected to each end 54d of the upright portion 53d, the other outer protrusion comes into contact with each end 34 of the light-transmitting portion 32 and presses each end 34 outward along the second direction. The other protrusion 55d that comes into contact with each end 34 receives a reactive force from the engaging portion 38 due to the pressing force. Each end 54d of the upright portion 53d presses each end 34 of the light-transmitting portion 32 by receiving a reactive force from each end 34 of the light-transmitting portion 32 via the other protrusion 55d that comes into contact with each end 34 of the light-transmitting portion 32.

[0117] The ends 34 of the light-transmitting portion 32 are pressed inward by the pair of ends 54d of the upright portion 53d, causing them to move closer together. Conversely, the ends 34 of the light-transmitting portion 32 are pressed outward by the pair of ends 54d of the upright portion 53d, causing them to move further apart, thereby correcting the deformation of the cover body portion 31. In other words, the ends 54d of the upright portion 53d function as correctors that correct the position of the ends 34 of the cover body portion 31 and correct the deformation of the cover body portion 31.

[0118] In this modified example 2, the upright portion 53d has a configuration in which one protruding portion 55d protrudes from both ends 54d toward the inner wall of the lateral space 40 along the second direction, and the other protruding portion 55d protrudes from both ends 54d toward the outer wall of the lateral space 40 along the second direction. Therefore, when both ends 34 of the cover body portion 31 are deformed to spread outward along the second direction, the pair of ends 54d correct the deformation by suppressing this spreading due to the resistance force from the engaging portion 38 received from one of the protruding portions 55d, and when the end 34 of the cover body portion 31 is deformed to narrow inward along the second direction, the pair of ends 54d correct the deformation by suppressing this narrowing due to the resistance force from the end 34 of the cover body portion 31 received from the other protruding portion 55d. Furthermore, the stress that corrects these deformations acts as a holding force for the lid portion 51d to be held by the cover body portion 31. The case in which the end portion 34 of the cover body 31 is deformed to narrow inward along the second direction is, for example, when the cover body 31 is manufactured by extrusion molding.

[0119] According to this modified example 2, the lid portion 51d provides a holding function between both the inner and outer walls of the lateral space 40. Therefore, the lid portion 51d can more reliably hold the cover body portion 31 even if the end portion 34 of the cover body portion 31 is deformed to spread outward or to narrow inward.

[0120] (Variation 3) The configuration of the lamp 3 in Modification 3 of this Embodiment 3 will now be described. Figure 12(d) is a side view showing the end of the lamp 3 according to Modification 3. Figure 12(d) is a diagram showing the lamp 3 of Modification 3 of this Embodiment 3 in the area A1 enclosed by the dashed frame shown in Figure 8(a).

[0121] In the lid portion 51e of this modified example 3, each of the two ends 54e in the second direction of the upright portion 53e is provided with a protruding portion 55e on the inner surface and outer surface of the end portion 54e in the second direction. In this modified example 3 as well, the two ends 54e in the second direction of the upright portion 53e are housed in the lateral space 40 of the cover body portion 31 when the lid portion 51c is attached to the cover body portion 31.

[0122] This modified example 3 will be explained in comparison with modified example 2. In modified example 2, the lid portion 51d has two protrusions 55d on the end portion 54d, which are located at the top of the end portion 54d. In contrast, in modified example 3, as shown in Figure 12(d), the two protrusions 55e are located lower than the top of the end portion 54e. As shown in Figure 12(d), in modified example 3 as well, the protrusions 55e on the outer surface of the end portion 54e are in contact with the end portion 34 of the light-transmitting portion 32, and the protrusions 55e on the inner surface of the end portion 54e are in contact with the engaging portion 38. Therefore, the lamp 3 of modified example 3 provides the same function and effect as the lamp 3 of modified example 2.

[0123] This modified example 3 can achieve the same effects and functions as modified example 2, and a detailed explanation thereof is omitted.

[0124] Although the luminaire, lighting device, and translucent cover have been described above based on embodiments and modifications, the luminaire, lighting device, and translucent cover of this disclosure are not limited to the configurations of the embodiments and modifications described above. The configuration of the lighting device described above is an example and may include other components. The luminaire, lighting device, and translucent cover of this disclosure include design modifications and variations in application that are commonly practiced by those skilled in the art, without departing from the technical idea. [Explanation of Symbols]

[0125] 1 Lighting device, 2 Fixture, 3 Luminaire, 9 Construction part, 20 Fixture body part, 21 Top part, 22 Side part, 23 Outer part, 24 Fixture end, 25 Knockout, 26 Terminal block, 27 Fixture-side power supply, 28 Fixture-side connector, 29 Luminaire mounting part, 30 Light-transmitting cover, 31 Cover body part, 32 Light-transmitting part, 33 Main part, 34 End part, 35 Connection part, 36 Mounting part, 37 Support part, 38 Engaging part, 40 Side space, 41 Inner surface, 42 Outer surface, 51, 51a~51e Cover part, 52 End wall part, 53, 53a~53e Elevating part, 54, 54a~54e End part, 55, 55c~55e Protruding part, 60 Base, 61 Base part, 62 Side section, 63 one side, 64 other side, 65 light source, 66 light-emitting element, 67 light source substrate, 68 power supply, 69 luminaire-side power supply, 70 power supply unit, 71 luminaire-side connector, 700 power supply line, 701 power supply line holder.

Claims

1. A base extending along the first direction, A light source positioned on one side of the aforementioned base, It has a light-transmitting cover that is attached to the base so as to cover the light source, The aforementioned light-transmitting cover is A cover body comprising: a light-transmitting portion extending along the first direction such that its inner surface faces one surface of the base; a pair of mounting portions provided on both sides of the base along the first direction; and a pair of connecting portions on both sides of the base connecting the ends of the light-transmitting portion in a second direction perpendicular to the first direction to the mounting portions, wherein a pair of lateral spaces are formed surrounded by the ends of the light-transmitting portion in the second direction, the mounting portions, and the connecting portions. The cover comprises an end wall portion that covers one end face in the first direction of the light-transmitting portion, and an upright portion that is erected from the end wall portion toward the other end face in the first direction so as to face the inner surface of the light-transmitting portion, and a lid portion that is attached to the end in the first direction of the cover body portion with each of the ends of the upright portion in the second direction housed in the lateral space, When the lid is attached to the cover body, if the cover body is deformed, one or both of the pair of attachment parts and the two ends of the light-transmitting part in the second direction are pressed by the two ends of the upright part in the second direction, and the light-transmitting part is positioned so as not to be in contact with the part of the upright part excluding the two ends, thereby ensuring a gap for air to flow between it and the part of the upright part excluding the two ends. Light equipment.

2. With the lid attached to the cover body, When the pair of mounting portions are pressed by both ends in the second direction of the upright portion, the distance between the inner surface of the light-transmitting portion and the upright portion of the lid becomes longer compared to when they are not pressed. The luminaire according to claim 1.

3. With the lid attached to the cover body, When both ends of the light-transmitting portion in the second direction are pressed by both ends of the upright portion in the second direction, the distance between the inner surface of the light-transmitting portion and the upright portion of the lid becomes shorter compared to the case where there is no pressing. The luminaire according to claim 1.

4. Each of the ends of the upright portion in the second direction is In the second direction, the outer surface, which is the surface moving away from the center of the lid, and the inner surface, which is the surface moving towards the center of the lid, have protrusions on one or both of these surfaces. A luminaire according to any one of claims 1 to 3.

5. A luminaire according to any one of claims 1 to 4, A fixture having a light fixture mounting section to which the aforementioned light fixture is attached, A lighting device having the following features.

6. A light-transmitting cover is attached to a base so as to cover a light source located on one side of the base that extends along a first direction, A cover body comprising: a light-transmitting portion extending along the first direction such that its inner surface faces one surface of the base; a pair of mounting portions provided on both sides of the base along the first direction; and a pair of connecting portions on both sides of the base connecting the ends of the light-transmitting portion in a second direction perpendicular to the first direction to the mounting portions, wherein a pair of lateral spaces are formed surrounded by the light-transmitting portion, the mounting portions, and the connecting portions. The cover comprises an end wall portion that covers one end face in the first direction of the light-transmitting portion, and an upright portion that is erected from the end wall portion toward the other end face in the first direction so as to face the inner surface of the light-transmitting portion, and a lid portion that is attached to the end in the first direction of the cover body portion with each of the ends of the upright portion in the second direction housed in the lateral space, When the lid is attached to the cover body, if the cover body is deformed, one or both of the pair of attachment parts and the two ends of the light-transmitting part in the second direction are pressed by the two ends of the upright part in the second direction, and the light-transmitting part is positioned so as not to be in contact with the part of the upright part excluding the two ends, thereby ensuring a gap for air to flow between it and the part of the upright part excluding the two ends. Light-transmitting cover.

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