Lighting device

Abstract

The purpose of the present invention is to provide a lighting fixture which has a simple structure and which can ensure an appropriate irradiation range of a light-emitting element. The lighting device is provided with a main body (10), a light source (20), a diffusion member (30) and a fixing member (40), the main body (10) is a long member, the light source (20) is a long member with a light-emitting element (21) mounted on one surface, and the light source (20) is composed of a substrate (22) which has a substantially rectangular parallelepiped shape and has substantially the same length as the main body (10), and the diffusion member (30) is fixed on the main body (10). And a diffusion member (30) which is a long member having substantially the same length as the main body, is disposed so as to cover the surface of the substrate (22) on which the light-emitting element (21) is mounted, has a uniform curved shape in the longitudinal direction, and diffuses light irradiated from the light-emitting element (21). The fixing member (40) is composed of two members for integrally fixing the main body (10), the light source (20), and the diffusion member (30) at both ends in the longitudinal direction, and a terminal for receiving power supply is provided in the fixing member (40).

Description

TECHNICAL FIELD

[0001] The present application relates to a lighting device using a light emitting element such as an LED. BACKGROUND

[0002] Various lighting devices using an LED have been proposed. For example, in Patent Literature 1, a lighting device having directivity in multiple directions by providing a cover member covering a light source of an LED with a light-transmissive property in a shape other than a circle is disclosed.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2019-160441 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The cross-sectional shape of the lighting device of Patent Literature 1 is not circular, so it is difficult to position a straight tube lamp, and in order to irradiate light in a desired direction, a protrusion for positioning or the like is used, so the structure becomes complicated.

[0008] Therefore, an object of the present application is to provide a lighting device which is simple in structure and can ensure a proper irradiation range of a light emitting element.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] In order to achieve the object, the lighting device of the present application is characterized in that, the lighting device includes a main body, a light source, a diffusion member, and a fixing member, the main body is a long strip-shaped member, the light source is a long strip-shaped member in which a light emitting element is mounted on one face surface, and is composed of a substantially cuboid-shaped substrate having substantially the same length as the main body, the diffusion member is a long strip-shaped member having substantially the same length as the main body, and is disposed so as to cover the face on which the light emitting element is mounted on the surface of the substrate, has a uniform curved shape in the length direction, and diffuses light irradiated from the light emitting element, the fixing member is composed of two members that integrally fix the main body, the light source, and the diffusion member at both end portions in the length direction, and has a terminal that receives power supply in the fixing member.

[0011] EFFECT OF THE INVENTION

[0012] According to the present application, by using a diffusion member for defining the irradiation direction of a light emitting element, irradiation in multiple directions can be performed. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is an overall perspective view showing the appearance of the lighting appliance of Embodiment 1 of the present application.

[0014] Figure 2 is an exploded view showing the internal structure of the lighting appliance of Embodiment 1 of the present application.

[0015] Figure 3 is a sectional view of the lighting appliance of Embodiment 1 of the present application, which is a cross section orthogonal to the length direction.

[0016] Figure 4 is a sectional view showing another example of the curved shape of the lighting appliance of Embodiment 1 of the present application.

[0017] Figure 5 is a sectional view showing an example of the zigzag shape of the lighting appliance of Embodiment 1 of the present application.

[0018] Figure 6 is a sectional view showing an example of the combination of the curved shape and the zigzag shape of the lighting appliance of Embodiment 1 of the present application.

[0019] Figure 7 is an explanatory view showing the light distribution characteristics of the LED light source of the lighting appliance of Embodiment 1 of the present application.

[0020] Figure 8 is an explanatory view showing the irradiation direction of the light emitted from the light emitting element in the case where the diffusion member of Figure 3 is used.

[0021] Figure 9 is a sectional view of the lighting appliance of Embodiment 2 of the present application.

[0022] Figure 10 is a plan view of the lighting appliance of Embodiment 3 of the present application.

[0023] Figure 11 is a perspective view showing an example in the case where the lighting appliance of Embodiment 4 of the present application includes a cover member.

[0024] Figure 12 is a sectional view of an example of the lighting appliance of Embodiment 4 of the present application.

[0025] Figure 13 is a sectional view showing another example of the cover member of the lighting appliance of Embodiment 4 of the present application.

[0026] Figure 14 is a sectional view showing still another example of the cover member of the lighting appliance of Embodiment 4 of the present application.

[0027] Figure 15This is a cross-sectional view of an example of a lighting fixture according to Embodiment 5 of the present invention. Detailed Implementation

[0028] Next, embodiments of the lighting fixture of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments described below represent specific examples of the present invention; therefore, the configuration, function, and values ​​of the constituent components described in the embodiments are merely examples, and the scope of the present invention is not to be construed as limited by these descriptions. Furthermore, in the accompanying drawings, components such as wiring, screws, and connectors are generally omitted. In the following figures, the same reference numerals are used to denote the same parts.

[0029] Example 1

[0030] Figure 1 This is an overall perspective view showing the appearance of the lighting fixture 1 according to Embodiment 1 of the present invention. Figure 1 As shown, the lighting fixture 1 is a straight-tube type LED light, suitable for use as a lighting fixture for display cases in shops. As shown in the figure, the lighting fixture 1 is equipped with a long, narrow diffuser member 30, and a pair of fixing members 40a and 40b are installed at both ends of the diffuser member 30 to secure the ends of the diffuser member 30. The fixing member 40 has a terminal for receiving power supply and engages with a socket (not shown) provided in the display case, etc., to secure it. It is not limited to this; the fixing member 40 can simply fix the main body 10, the light source 20, and the diffuser member 30 at both ends of the main body 10. The lighting fixture 1 is secured to the socket provided in the display case, etc., thereby positioning the illumination direction. Alternatively, the illumination direction can also be positioned by directly fixing the lighting fixture 1 itself to the display case, etc.

[0031] Figure 2 This is an exploded view showing the internal structure of the lighting fixture 1 according to Embodiment 1 of the present invention. Figure 3 This is a cross-sectional view of the lighting fixture 1 according to Embodiment 1 of the present invention, with its cross-section orthogonal to the length direction. For example... Figure 2 As shown, the lighting fixture 1 consists of a main body 10, a light source 20, and a diffuser 30, all of which are elongated and have approximately the same length. Furthermore, at both ends of the main body 10, the light source 20, and the diffuser 30, there are: a main body 10; and two approximately circular fixing members 40a and 40b, which integrally fix the light source 20 and the diffuser 30. The lighting fixture 1 illuminates the merchandise on the display case with light emitted from the light-emitting element 21 of the light source 20 through the diffuser 30.

[0032] The main body 10 has a straight tube shape, which is a roughly semi-circular shape that bulges downward along its length. The main body 10 supports the substrate 22 constituting the light source 20 and also functions as a heat sink to dissipate heat generated from light-emitting elements such as LEDs mounted on the surface of the substrate 22. Furthermore, the heat sink may also be disposed along the back side of the substrate 22 in the space between the main body 10 and the substrate 22. Additionally, the shape of the cross-section of the main body 10 orthogonal to the length direction is... Figure 3 The shape is roughly semi-circular, but it is not limited to this. As long as it is a cuboid or other shape that can support the light source 20, it can be any shape.

[0033] The light source 20 is composed of a substrate 22 on one surface on which light-emitting elements 21 are mounted. For example... Figure 2 As shown, the substrate 22 is a generally rectangular flat plate that matches the shape of the main body 10, and multiple light-emitting elements 21 are mounted on one side in a row. Furthermore, the number and arrangement of the light-emitting elements 21 can also be a structure in which multiple rows of light-emitting elements 21 are arranged in parallel, or a spiral structure. Multiple light-emitting elements 21 and a power terminal (not shown) for receiving DC power from a power supply device (not shown) are arranged on the surface of the substrate 22.

[0034] The light-emitting element 21 uses a rectangular LED element, but it can also be a square or round LED element. The illumination light in the lighting fixture 1 is daylight white, but depending on the merchandise displayed in the display case, it can also be daylight white, bulb white, or warm white, depending on the purpose. In addition, as the illumination light, a light source with wavelength range that has bactericidal and anti-mildew effects can also be used. When a light source with bactericidal and other effects is used, it is possible to effectively sterilize and prevent mold on the merchandise displayed in the display case.

[0035] Compared to fluorescent lamps, LED elements emit light with higher directionality and brightness. Therefore, by arranging the diffusion member 30 to cover the surface on which the light-emitting element 21 is mounted, the light emitted from the light-emitting element 21 diffuses in multiple directions and is illuminated as uniform light.

[0036] The diffuser member 30 has a curved shape, such as Figure 3 As shown, the cross-section of the curved diffusion member 30 has a plurality of convex surfaces 31 that are curved into a convex shape toward the light irradiation direction and a concave surface 32 that protrudes toward the substrate 22 between two convex surfaces 31. In addition, a pair of convex surfaces 31a and 31b are provided on the side of the diffusion member 30, and a concave surface 32a is provided between the convex surfaces 31a and 31b. For example, convex surfaces 31a, concave surfaces 32a, convex surfaces 31b, concave surfaces 32b, convex surfaces 31c, concave surfaces 32c, and convex surfaces 31d are provided alternately. Figure 4 This is a cross-sectional view showing another example of the curved shape. For example, as...Figure 4 The diffusion member 30 can also have a zigzag shape as shown in FIG. 10. The zigzag shape is a shape in which the diffusion member 30 has a zigzag-shaped concave-convex 33 on the surface thereof in a cross section orthogonal to the longitudinal direction of the main body 10. In the example shown in FIG. 10, the diffusion member 30 has a zigzag-shaped concave-convex 33a on the surface thereof on the opposite side (outer side) of the substrate 22 and a zigzag-shaped concave-convex 33b on the surface thereof on the substrate 22 side (inner side). In this figure, a case in which the diffusion member 30 has the zigzag-shaped concave-convex 33a and 33b on both the outer side and the inner side thereof is shown, but this is not limiting, and the diffusion member 30 can have the zigzag-shaped concave-convex 33 on either the outer side or the inner side thereof. By providing the zigzag-shaped concave-convex 33a or 33b on the surface of the diffusion member 30, a uniform diffusion effect of the irradiated light can be expected. Figure 3 Figures 1 to 3 Figure 4

[0037] Figure 5 Figure 5 Figure 5

[0038] Figure 6 Figure 4 Figure 6

[0039] ​​​​​​​​​The diffuser member 30 is a long strip along the main body 10 with a fixed cross-section, manufactured by extrusion molding or similar processes. The diffuser member 30 may be made of resins such as polycarbonate, but is not limited to these; it may also be made of acrylic resins such as PMMA (polymethyl methacrylate), polystyrene, etc. The shape and material of the diffuser member 30 are not limited to the examples described, as long as they can change the direction of light irradiation from the light-emitting element 21 and allow light to pass through. Furthermore, light diffusion or anti-glare properties can be imparted by processing the surface of the diffuser member 30 into a frosted glass-like or slit-like pattern. The diffuser member 30 is not limited to a single long strip; it may also be divided into multiple members.

[0040] Next, the light distribution of the illumination light emitted from the light-emitting element such as an LED in the lighting fixture 1 of Embodiment 1 of the present invention will be described. Figure 7 This is an explanatory diagram showing the light distribution characteristics of an LED light source. Figure 7 This indicates the light distribution characteristics when the light-emitting element 21 is arranged in the center (0%) and the illumination direction of the light-emitting element 21 is consistent with the downward direction (0 degrees) of the figure. Figure 7 The dashed curve in the figure represents the pointing characteristics of the LED corresponding to the illumination angle without the diffuser 30. The thick curve in the figure represents the pointing characteristics with... Figure 5 The pointing characteristics of an LED corresponding to the illumination angle in the case of a serrated diffuser member 30. Figure 7 The diagram shows that without the diffusion element 30, the effective irradiation range remains approximately 15 to 60 degrees to the left and right. In contrast, with the use of the diffusion element 30... Figure 5 The effective irradiation range of the diffuser 30 shown is approximately 120 degrees to the left and right, and the effective irradiation light illuminates a wide area.

[0041] Figure 8 It means to use Figure 3 This diagram illustrates the direction of light emitted from the light-emitting element 21 when the diffuser member 30 is in place. First, the light emitted from the light-emitting element 21 illuminates inside the diffuser member 30 in the direction shown by the dashed line. Then, the emitted light enters the diffuser member 30, is refracted, and changes its direction of travel, moving towards... Figure 8 The solid arrow points in the direction of the light-emitting element 21. As a result, the light emitted from the light-emitting element 21 shines not only in a direction perpendicular to the surface on which the light-emitting element 21 is mounted, but also horizontally and rearward. Thus, the LED element... Figure 7 As shown, the irradiated light ranges from 15 to 60 degrees to the left and right, exhibiting strong directionality. However, by implementing a prismatic shape for the diffusion member 30 in the embodiment, the irradiated light emitted from the light-emitting element 21 is diffused over a wide area, achieving efficient light distribution. Through the use of... Figure 5The diffusion member 30 having the sawtooth-shaped protrusions and depressions 33 can uniformly radiate light over a wide range of approximately 120 degrees or more. As a result, light emitted from the light emitting element 21 is radiated not only in a direction perpendicular to the surface on which the light emitting element 21 is mounted but also in multiple directions. In addition, by providing the diffusion member 30 in a curved shape as in the embodiment shown in FIG. 6, the radiating direction of light radiated from the light emitting element 21 can be expanded. Furthermore, by arranging the curved shape, the sawtooth shape, and combining these shapes of the diffusion member 30, the radiating range of uniform light having diffusivity over a wide range can be expanded. Figure 3

[0042] The lighting appliance 1 of the present embodiment radiates radiated light emitted from the light emitting element 21 in multiple directions, and can ensure not only a direction perpendicular to the surface on which the light emitting element 21 is mounted but also a radiating range of light that is bent in a horizontal direction and a rear direction. The lighting appliance 1 is mounted, for example, on an upper portion of a display shelf provided in a store, and radiates light from the light emitting element 21 such as an LED to goods on the display shelf. The LED has high directivity, but by providing the diffusion member 30, light can be radiated in multiple directions. As a result, the lighting appliance 1 of the embodiment can ensure an appropriate radiating range. In addition, the lighting appliance 1 is suitable, for example, for a lamp stand for a straight tube fluorescent lamp, or is directly fixed to a display shelf or the like, and thus does not require a complex structure using a protrusion or the like for positioning. Furthermore, if the light emitting element 21 that radiates light having a sterilizing, mold-preventing, deodorizing, or the like effect is used, sterilization or the like of goods or the like can also be effectively performed. Thus, the lighting appliance 1 can be appropriately used, for example, as lighting provided for a display shelf in a store.

[0043] Embodiment 2

[0044] Next, another embodiment of the lighting appliance of the present application will be described. The lighting appliance 2 of Embodiment 2 further specifies the shape of the diffusion member 30 and the like, and is the same as the lighting appliance 1 shown in the description of Embodiment 1 except for the following description.

[0045] The diffusion member 30 of the lighting appliance 2 is provided standing from the substrate 22, and has a curved shape in a cross section orthogonal to the longitudinal direction of the main body 10, and has a shape in which the cross section is a heart shape as shown in FIG. 7. Figure 9 Figure 9 is an example of a cross-sectional view orthogonal to the longitudinal direction of the lighting appliance 2, and shows the cross section of the diffusion member 30 in Embodiment 2. As with the diffusion member 30 in Embodiment 1 shown in FIG. 5, Figure 4 , Figure 6 Figure 9 ​​​​As shown, by setting the shape of the diffusion member 30 to a shape with a cross section in the shape of a heart, the light emitted from the light emitting element 21 is diffused in multiple directions. As with the lighting device 1 of Embodiment 1, the lighting device 2 is able to expand the irradiation range not only in the direction perpendicular to the face on which the light emitting element 21 is surface-mounted, but also in the horizontal direction. In addition, as shown in Figure 9 As shown, the diffusion member 30 is erected on the substrate 22, thereby enabling miniaturization and facilitating the use in combination with the cover member described later. In addition, the diffusion member 30 in this embodiment can be erected on the main body 10 as in Embodiment 1, or can be in a shape in which the main body 10 and the light source 20 are entirely enclosed.

[0046] Also, the diffusion member 30 can include the jagged shape as in Embodiment 1. In addition, as shown in Figure 6 As shown, the diffusion member 30 can have the jagged concave-convex 33b and the jagged concave-convex 33c respectively provided on the inner side (back side) of the convex curved surface 31b and the convex curved surface 31c in the shape of a heart in cross section. In addition, the jagged concave-convex 33 is not limited thereto, and can be provided on the outer side of the curved shape as in Embodiment 1, or can be provided on both the outer side and the inner side. Furthermore, the number of the concave-convex 33 is not limited. As described above, the jagged concave-convex 33, i.e., the prismatic shape, implemented on the diffusion member 30 contributes to the uniform diffusion of the light emitted from the light emitting element 21, and enables more efficient light distribution. By providing the jagged concave-convex 33 at an appropriate position of the diffusion member 30, the lighting device of Embodiment 2 is able to more appropriately diffuse the light emitted from the light emitting element 21.

[0047] Embodiment 3

[0048] Next, another embodiment of the lighting device of the present application will be described. The lighting device 3 of Embodiment 3 is an example in which power supply is accepted from a pin-shaped terminal provided to a fixing member 40. Therefore, the lighting device is the same as the lighting devices shown in the descriptions of the other embodiments except for the following description.

[0049] Figure 10 is a plan view of the lighting device 3. Figure 10 A and Figure 10 The lighting device 3A and the lighting device 3B in (A) and (B) are each provided with a fixing member 40a and a fixing member 40b at both ends of the main body 10. The fixing member 40 corresponds to a socket of a conventional type of straight tube lamp. Figure 10 The fixing member 40b of the lighting device 3A of (A) has a terminal 41a. As shown in Figure 10 As shown, the terminal 41a has a connector at the front end of the pin-shaped terminal, from which power supply is accepted. In this way, the terminal provided to the fixing member can have a connector at the front end. In addition, in Figure 10In (A) of FIG. 4, the terminal 41a is provided to the fixing member 40b, but the terminal can also be provided to the fixing member 40a, or to both the fixing member 40a and the fixing member 40b. Also, as in (B) of FIG. 4, the fixing member 40a and the fixing member 40b can each have a pin-shaped terminal 41b and a terminal 41c (for example, a G13 lamp cap according to JIS standards), and receive power supply from the terminals 41. The terminals 41 of the fixing member 40 are engaged with and secured to a socket (not shown) provided to a display case or the like, the irradiation direction is determined, and power supply is received through the socket. Further, in (C) of FIG. 4, the fixing member 40a and the fixing member 40b can each have a pin-shaped terminal 41b and a terminal 41c (for example, a GZ16 lamp cap according to JIS standards), and receive power supply from the terminals 41. Figure 10 In (B) of FIG. 4, the fixing member 40a and the fixing member 40b each have a pin-shaped terminal 41b and a terminal 41c (for example, a G13 lamp cap according to JIS standards), and receive power supply from the terminals 41. The terminals 41 of the fixing member 40 are engaged with and secured to a socket (not shown) provided to a display case or the like, the irradiation direction is determined, and power supply is received through the socket. Further, in (C) of FIG. 4, the fixing member 40a and the fixing member 40b can each have a pin-shaped terminal 41b and a terminal 41c (for example, a GZ16 lamp cap according to JIS standards), and receive power supply from the terminals 41. Figure 10 In (B) of FIG. 4, the fixing member 40a and the fixing member 40b each have a pin-shaped terminal 41b and a terminal 41c (for example, a G13 lamp cap according to JIS standards), and receive power supply from the terminals 41. The terminals 41 of the fixing member 40 are engaged with and secured to a socket (not shown) provided to a display case or the like, the irradiation direction is determined, and power supply is received through the socket. Further, in (C) of FIG. 4, the fixing member 40a and the fixing member 40b can each have a pin-shaped terminal 41b and a terminal 41c (for example, a GZ16 lamp cap according to JIS standards), and receive power supply from the terminals 41.

[0050] Embodiment 4

[0051] Next, another embodiment of the lighting appliance of the present application will be described. The lighting appliance 4 of Embodiment 4 is an example having a cover member. Therefore, the lighting appliance is the same as the lighting appliances shown in the descriptions of the other embodiments, except for the following description.

[0052] Figure 11 is a perspective view showing an example of the lighting appliance of Embodiment 4 of the present application including a cover member, Figure 12 is a cross-sectional view of an example of the lighting appliance of Embodiment 4 of the present application. The lighting appliance 4 can also include a cover member 50, which is cylindrical as in Figure 11 and Figure 12 is a perspective view showing an example of the lighting appliance of Embodiment 4 of the present application including a cover member,

[0053] The lighting appliance of the present disclosure can also have no cover member 50 as described in the explanation of Embodiment 1, and the diffusion member 30 can function as the cover member 50. In addition, the shape of the cover member 50 is not limited to the cylindrical shape.

[0054] Figure 13 is a cross-sectional view showing another example of the cover member of the lighting appliance of the present disclosure, Figure 14 is a cross-sectional view showing still another example of the cover member of the lighting appliance of the present disclosure. As shown in Figure 13 , the shape of the cover member 50 is semicircular in cross section, and can also be a structure configured to cover the surface of the main body 10 on which the light source 20 is disposed. In addition, the shape of the main body 10 is not limited to being semicircular in cross section, and can also be Figure 14 , which is substantially trapezoidal in cross section, and the shape is not limited thereto. In this case, as shown in the drawing, the cover member 50 can be provided in a shape that is about three-quarters of a circle in cross section, and can also be configured to cover the main body 10 provided with the light source 20 and the diffusion member 30. In addition, by providing the main body 10 in a shape that cuts the outer portion of the diffusion member 30, the effect of further diffusing light also to the rear of the lighting appliance of the present disclosure can be obtained. In this way, the shape of the above-described lighting appliance can take various forms together with the shape of the cover member 50. In addition, the cover member 50 can be fixed to the main body, or can be configured to be detachable.

[0055] Embodiment 5

[0056] Another embodiment of the lighting appliance of the present disclosure will be described. Figure 15 is a cross-sectional view of an example of the lighting appliance of Embodiment 5 of the present disclosure. The lighting appliance 5 of the present embodiment is an example of a lighting appliance provided with a heat sink and a power source. The other structures are the same as those of each of the lighting appliances of the other embodiments. In addition, the lighting appliance 2 can be provided with only the heat sink 60, or only the power source 70, or both the heat sink 60 and the power source 70.

[0057] As shown in Figure 15 , the lighting appliance 5 is provided with the heat sink 60 along the length direction of the substrate 22 on the side opposite to the surface on which the light emitting element 21 is mounted. In addition, the configuration and shape of the heat sink 60 are not limited to the above-described example, and can be any as long as heat can be efficiently dissipated. In addition, as described above, the heat sink 60 can function as the main body 10, or can be configured separately from the main body. The heat sink 60, for example, by being disposed along the length direction of the back surface of the substrate 22, can efficiently dissipate heat generated by the light emitting element 21. The material of the heat sink 60 is, for example, a metal such as aluminum, iron, copper, or the like, but is not limited thereto as long as heat can be efficiently dissipated. Figure 15 As shown in , the shape of the heat sink includes, for example, a two-tube shape, but is not limited thereto.

[0058] In addition, the lighting fixture 5 can also have a power supply 70 built in. The power supply 70 is disposed, for example, on the opposite side of the surface of the substrate 22 on which the light emitting element 21 is surface-mounted. Further, the power supply 70 is used to convert household electricity, which is alternating current, into direct current suitable for LED devices, and supply power to the light emitting element 21. The power supply 70 can be, for example, a switching power supply (SMPS). The power supply 70 is not limited to this, but can supply power suitable for LED devices.

[0059] Further, in the case where the lighting fixture 2 includes both the heat sink 60 and the power supply 70, the power supply 70 can be disposed between the heat sinks 60, for example, as shown in FIG. 6. In the case where the power supply 70 is disposed in a manner surrounded by the heat sinks 60 as shown in this figure, the heat generated by the power supply 70 is efficiently dissipated together with the heat generated by the light emitting element 21. In addition, the disposition of the power supply 70 is not limited to the disposition illustrated in this figure. Figure 15 Figure 11

[0060] The present application has been described above with reference to embodiments, but the present application is not limited to the above-described embodiments. As to the structure and details of the present application, various modifications that can be understood by those skilled in the art can be made within the scope of the present application.

[0061] This application claims priority from Japanese Application No. 2023-136082 filed on August 24, 2023, the disclosure of which is incorporated herein in its entirety.

[0062] Industrial Applicability

[0063] According to the present application, in a straight pipe type LED lighting fixture, by using a diffusion member for defining the irradiation direction of a light emitting element, irradiation in multiple directions is possible. Thereby, proper lighting in a display case can be ensured.

[0064] Explanation of Reference Numerals

[0065] 1, 1B, 1C, 1D, 2, 3, 3A, 3B, 4, 4B, 4C, 5 Lighting fixture

[0066] 10 Main body

[0067] 20 Light source

[0068] 21 Light emitting element

[0069] 22 Substrate

[0070] 30 Diffusion member

[0071] 31, 31a, 31b, 31c, 31d Convex surface

[0072] ​​32, 32a, 32b, 32c concave surface

[0073] 33, 33a, 33b, 33c jagged concave-convex

[0074] 40, 40a, 40b fixing member

[0075] 41, 41a, 41b, 41c terminal

[0076] 50 cover member

[0077] 60 heat sink

[0078] 70 power source

Claims

1. A lighting appliance characterized by comprising: a main body, a light source, a diffusion member, and a fixing member, the main body is a long member, the light source is a long member in which a light emitting element is surface-mounted on one face, and is composed of a substantially cuboid-shaped substrate having substantially the same length as the main body, the diffusion member is a long member having substantially the same length as the main body, and is arranged so as to cover the face on which the light emitting element is surface-mounted on the substrate, has a uniform curved shape in the length direction, and diffuses light emitted from the light emitting element, the fixing member is composed of two members that integrally fix the main body, the light source, and the diffusion member at both ends in the length direction, and has a terminal that receives power supply in the fixing member.

2. The lighting appliance according to claim 1, wherein the curved shape is a shape in which a cross section of the diffusion member orthogonal to the length direction of the main body has a plurality of convex surfaces curved toward the opposite side of the substrate and a concave surface protruding toward the substrate side between the convex surfaces.

3. The lighting appliance according to claim 1 or 2, wherein the diffusion member has a zigzag shape, the zigzag shape is a shape in which at least one of the front surface and the back surface of the diffusion member has a zigzag-shaped concave-convex in a cross section orthogonal to the length direction of the main body.

4. The lighting appliance according to claim 2, wherein the diffusion member is provided standing from the substrate, and in a cross section orthogonal to the length direction of the main body, the cross section of the curved shape is a heart shape.

5. The lighting appliance according to claim 1, wherein the fixing member has a terminal by which the main body is fixedly mounted, and receives power supply from the terminal.

6. The lighting appliance according to claim 1, wherein the lighting appliance further comprises a cover member, the cover member has light transmittance and is arranged so as to cover the light source and the diffusion member.

7. The lighting appliance according to claim 1, wherein the lighting appliance further comprises a heat sink, the heat sink is arranged along the length direction of the substrate on the opposite side of the face of the substrate on which the light emitting element is surface-mounted.

8. The lighting appliance according to claim 1, wherein the lighting appliance further comprises a power supply, the power supply is arranged on the opposite side of the face of the substrate on which the light emitting element is surface-mounted.

9. The lighting appliance according to claim 7, wherein the lighting appliance further comprises a power supply, the power supply is arranged between the heat sinks.

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