Diffuse lighting fixtures

Abstract

This utility model belongs to the field of lighting technology and discloses a diffuse reflection lighting device. Both the first and second light-blocking sections are provided with diffuse reflection layers. Direct light emitted by the lighting unit located in the installation space can be effectively intercepted by the adjacent sides of the first and second light-blocking sections, preventing direct light from illuminating the object to be illuminated below the main body of the device and causing localized overexposure or directional shadows. Furthermore, after the direct light reaches the adjacent sides of the first and second light-blocking sections, it forms diffuse reflection light under the action of the diffuse reflection layers, enhancing the uniformity of illumination on the object to be illuminated, improving the overall illumination effect of the lighting unit on the object to be illuminated, and ensuring the accuracy of subsequent visual inspection operations on the object to be illuminated. The diffuse reflection lighting device only provides diffuse reflection layers on the first and second light-blocking sections, shortening the reflection path and reducing the cost of reflection, thereby reducing the overall manufacturing cost of the light-blocking unit and decreasing the light loss rate.

Description

Technical Field

[0001] This utility model belongs to the field of lighting technology, and in particular relates to a diffuse reflection lighting device. Background Technology

[0002] Visual inspection is a non-contact inspection technology that uses machine vision equipment to acquire images of the object being inspected, and then uses image processing algorithms to analyze, identify, and measure the images to automatically determine whether the object meets preset standards such as defects, dimensions, and positions. To reduce the difficulty of visual inspection, lighting devices are usually required to illuminate the workpiece and improve the accuracy of the results. However, for objects with complex curved surfaces, high reflectivity, or deep hole structures, the lighting devices struggle to provide shadow-free and highly uniform illumination due to the inherent characteristics of the object.

[0003] To improve the visual inspection of objects with complex curved surfaces, high reflectivity, or deep hole structures, lighting devices are usually equipped with dome light sources. The hemispherical inner walls of the dome light source are coated with a high reflectivity coating. When the LED light source shines on the hemispherical inner wall from the side, it can form uniform diffuse light through multiple reflections, thereby effectively reducing the shadows of objects with complex curved surfaces, high reflectivity, or deep hole structures.

[0004] However, the hemispherical inner wall of a dome light source cannot effectively block all direct light rays. Direct light shining directly onto the object surface can easily cause localized overexposure or directional shadows on the object being inspected, reducing illumination uniformity and shadowless illumination effect, thus affecting the detection accuracy of the object. Generating uniform diffuse reflection light with a dome light source requires a precise hemispherical reflective cavity coated with a high-reflectivity coating on its inner wall. This design is complex and costly to manufacture. Furthermore, the high-reflectivity coating covers a large area, requiring multiple reflections of the light, resulting in significant light loss. Additionally, the overall footprint of a dome light source is large, making integration with other detection elements difficult. Utility Model Content

[0005] The purpose of this invention is to provide a diffuse reflection lighting device that can effectively block direct light, improve the uniformity of illumination on the object to be illuminated, improve the lighting effect, ensure the accuracy of subsequent detection of the object to be illuminated, reduce the area occupied by the light-blocking unit and the manufacturing cost, and improve the integration of the light-blocking unit with other components.

[0006] To achieve this objective, the present invention adopts the following technical solution.

[0007] This utility model proposes a diffuse reflection lighting device, comprising: a device body, including a first main body portion and a second main body portion spaced apart along a first horizontal direction; a light-blocking unit, including a first light-blocking portion and a second light-blocking portion both extending along a second horizontal direction and both provided with a diffuse reflection layer, the second horizontal direction being perpendicular to the first horizontal direction, the first main body portion and the second main body portion both having a first light-blocking portion and a second light-blocking portion protruding from each other on the side close to each other along the first horizontal direction, the second light-blocking portion being correspondingly disposed below the first light-blocking portion, the length of the second light-blocking portion protruding from the device body along the first horizontal direction being less than the length of the corresponding first light-blocking portion protruding from the device body along the first horizontal direction, and an installation space being formed between a corresponding first light-blocking portion and a second light-blocking portion; and lighting units, each of which is installed within the installation space, the direct light of the lighting unit being intercepted by the side close to each other of the first light-blocking portion and the second light-blocking portion, so that the direct light is reflected by the diffuse reflection layer to form diffuse reflection light and illuminate the object to be illuminated below the device body.

[0008] Alternatively, the top surfaces of both the first and second main bodies are provided with a plurality of heat dissipation fins spaced apart along a first horizontal direction, and each heat dissipation fin extends along a second horizontal direction.

[0009] Optionally, the first main body and the second main body are each provided with a first light-blocking part that protrudes along the first horizontal direction and is spaced apart. The diffuse reflection lighting device also includes a camera mounting base, which is connected to the top surface of the two first light-blocking parts.

[0010] Optionally, the distance between the two first light-blocking parts along the first horizontal direction shall not be less than 2 mm.

[0011] Optionally, the lighting unit includes a PCB board, a connector, and a lighting strip. The connector is disposed on and electrically connected to the lighting strip, and the connector is plugged into the PCB board.

[0012] Optionally, the second light-blocking part is provided with a clearance notch along the first horizontal direction, and the PCB board can be inserted into the connector along the first horizontal direction through the clearance notch.

[0013] Optionally, multiple light-blocking protrusions are provided on the side of the first light-blocking part and the second light-blocking part that are close to each other, and each light-blocking protrusion is provided with a diffuse reflection layer.

[0014] Optionally, both the first main body and the second main body have chamfers at their bottoms on opposite sides along the first horizontal direction.

[0015] Alternatively, both the first and second main body parts can be made of aluminum alloy.

[0016] Alternatively, the cross-section of the first main body portion perpendicular to the first horizontal direction and the cross-section of the second main body portion perpendicular to the first horizontal direction are both inverted L-shaped or arc-shaped.

[0017] The beneficial effects of this utility model are:

[0018] This invention proposes a diffuse reflection lighting device. Both the first and second light-blocking sections are equipped with diffuse reflection layers. Direct light emitted by the lighting unit within the installation space is effectively intercepted by the adjacent sides of the first and second light-blocking sections, preventing direct light from illuminating the object to be illuminated below the device body and causing localized over-brightness or directional shadows. Furthermore, after reaching the adjacent sides of the first and second light-blocking sections, the direct light is diffused by the diffuse reflection layers, enhancing the uniformity of illumination and improving the overall lighting effect of the lighting unit, thus ensuring the accuracy of subsequent visual inspection of the object. The second light-blocking section protrudes from the device body in a first horizontal direction by a shorter length than the corresponding first light-blocking section in the same direction. This ensures that the diffused light is distributed evenly across the lower region of the device body, uniformly illuminating the object. The length difference between the first and second light-blocking sections in the first horizontal direction reduces the proportion of light escaping to the upper region of the device body, improving light energy utilization. Compared to existing lighting devices that incorporate a hemispherical chamber with a high-reflectivity coating on its inner wall, the diffuse reflection lighting device proposed in this invention only features a diffuse reflection layer in the first and second light-blocking sections. This significantly shortens the reflection path and reduces the cost of reflection, lowering the overall manufacturing cost of the light-blocking unit and reducing light loss. The light-blocking unit occupies a small area and has a high degree of integration with other components. Lighting units are housed within the corresponding installation spaces formed by the first and second light-blocking sections, effectively protecting the lighting units, reducing the impact of external vibrations or collisions with surrounding structures, and extending the lifespan of the lighting units. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the diffuse reflection lighting device described in an embodiment of the present invention from a first viewing angle;

[0020] Figure 2 This is a schematic diagram of the diffuse reflection lighting device described in this embodiment of the present invention from a second viewing angle;

[0021] Figure 3 This is a schematic diagram of the structure of the device body, light-blocking unit, lighting unit and heat dissipation fins described in the embodiment of this utility model.

[0022] In the picture:

[0023] 1. Main body of the device; 11. First main body part; 12. Second main body part; 13. Chamfer; 2. Light blocking unit; 21. First light blocking part; 22. Second light blocking part; 221. Clearance notch; 3. Lighting unit; 31. PCB board; 32. Connecting connector; 33. Lighting strip; 4. Heat dissipation fin plate; 5. Camera mounting bracket. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 3As shown, this embodiment provides a diffuse reflection lighting device, including a device body 1, a light-blocking unit 2, and a lighting unit 3. The device body 1 includes a first main body portion 11 and a second main body portion 12 spaced apart along a first horizontal direction. The light-blocking unit 2 includes a first light-blocking portion 21 and a second light-blocking portion 22, both extending along a second horizontal direction and each having a diffuse reflection layer. The second horizontal direction is perpendicular to the first horizontal direction. The first main body portion 11 and the second main body portion 12, on opposite sides along the first horizontal direction, each have a protruding first light-blocking portion 21 and a second light-blocking portion 22. The second light-blocking portions 22 are arranged one-to-one. The first light-blocking part 21 is positioned below the second light-blocking part 22. The length of the second light-blocking part 22 protruding from the main body 1 in the first horizontal direction is less than the length of the corresponding first light-blocking part 21 protruding from the main body 1 in the first horizontal direction. A mounting space is formed between the corresponding first light-blocking part 21 and the second light-blocking part 22. An illumination unit 3 is installed in each mounting space. The direct light from the illumination unit 3 can be intercepted by the side of the first light-blocking part 21 and the second light-blocking part 22 that are close to each other, so that the direct light forms diffuse reflection light under the reflection of the diffuse reflection layer and illuminates the object to be illuminated below the main body 1. It can be understood that the first light-blocking part 21 on one side of the first main body 11, the second light-blocking part 22 located below it, and the first main body 11 together form an installation space. The first light-blocking part 21 on one side of the second main body 12, the second light-blocking part 22 located below it, and the second main body 12 together form another installation space. An illumination unit 3 is installed in each of the above two installation spaces.

[0029] In this embodiment, both the first light-blocking part 21 and the second light-blocking part 22 are provided with a diffuse reflection layer. The direct light emitted by the lighting unit 3 located in the installation space can be effectively intercepted by the side of the first light-blocking part 21 and the second light-blocking part 22 that are close to each other. This prevents the direct light from directly illuminating the object to be illuminated below the main body 1 of the device, thus avoiding local over-brightness or directional shadows on the object to be illuminated. After the direct light reaches the side of the first light-blocking part 21 and the second light-blocking part 22 that are close to each other, it will form diffuse reflection light under the action of the diffuse reflection layer provided by the two parts. This enhances the uniformity and non-directionality of the illumination of the object to be illuminated. The back-end AI algorithm does not need to perform complex image fusion or compensation processing for different lighting angles. It can directly use a single visual image for defect recognition, which reduces the complexity of the algorithm and the computing power requirements. It also improves the overall illumination effect of the lighting unit 3 on the object to be illuminated, ensuring the detection accuracy of the subsequent visual inspection operation of the object to be illuminated. The light-blocking part 2 also enhances the versatility of the lighting unit 3 in illuminating various objects to be illuminated, such as complex curved surfaces and highly reflective objects. The length of the second light-blocking part 22 protruding from the main body 1 in the first horizontal direction is less than the length of the corresponding first light-blocking part 21 protruding from the main body 1 in the first horizontal direction. This results in diffused light being distributed in the lower region of the main body 1 and uniformly illuminating the object to be illuminated. The length difference between the first light-blocking part 21 and the second light-blocking part 22 in the first horizontal direction reduces the proportion of light escaping to the upper region of the main body 1, thus improving light energy utilization. Compared to the prior art lighting device with a hemispherical cavity and a high-reflection coating applied to the entire inner wall of the hemispherical cavity, the diffuse reflection lighting device proposed in this embodiment only has a diffuse reflection layer on the first light-blocking part 21 and the second light-blocking part 22. This significantly shortens the reflection path and reduces the cost of reflection, thereby reducing the overall manufacturing cost of the light-blocking unit 2 and decreasing the light loss rate. The light-blocking unit 2 occupies a small area and has a high degree of integration with other components. Lighting units 3 are provided in the installation spaces formed by the corresponding first light-blocking part 21 and second light-blocking part 22, which effectively protects the lighting units 3, reduces the impact of external vibration or collisions with surrounding structures on the lighting units 3, and extends the service life of the lighting units 3. Both the light-blocking unit 2 and the lighting unit 3 are integrated into the main body 1 of the device, which improves the overall integration of the diffuse reflection lighting device.

[0030] Specifically, multiple light-blocking protrusions are provided on the sides of the first light-blocking part 21 and the second light-blocking part 22 that are close to each other, and each light-blocking protrusion is provided with a diffuse reflection layer. The multiple light-blocking protrusions realize the secondary reflection and dispersion of diffuse reflection light, further improve the uniformity of diffuse reflection light distribution, enhance the non-directionality and uniformity of illumination of the object to be illuminated by the illumination unit 3, and reduce the formation of local light spots on the object to be illuminated.

[0031] Optionally, the top surfaces of both the first main body 11 and the second main body 12 are provided with a plurality of heat dissipation fins 4 spaced apart along a first horizontal direction, and each heat dissipation fin 4 extends along a second horizontal direction. Providing a plurality of heat dissipation fins 4 spaced apart along the first horizontal direction and extending along the second horizontal direction can effectively increase the heat exchange area of ​​the lighting unit 3 and the device body 1, optimize the heat dissipation effect of the lighting unit 3 during the lighting process, and extend the service life of the lighting unit 3. Compared to providing heat dissipation fins 4 only on the first main body 11 or the second main body 12, providing heat dissipation fins 4 on the top surfaces of both the first main body 11 and the second main body 12 improves the heat dissipation efficiency of the device body 1, also improves the heat dissipation uniformity of the device body 1, and reduces the risk of structural deformation due to localized overheating.

[0032] For example, the multiple heat dissipation fins 4 provided on the top surfaces of the first main body 11 and the second main body 12 are distributed in a U-shape or C-shape. The multiple heat dissipation fins 4 are arranged together to form a three-dimensional heat dissipation structure, which realizes effective utilization of the top surface space of the device body 1 and significantly enhances the heat dissipation effect of the device body 1. Actual test results show that after the lighting unit 3 operates at full power for eight hours, the temperature of the first main body 11 and the second main body 12 with U-shaped or C-shaped heat dissipation fins 4 is 25°C lower than the temperature of the first main body 11 and the second main body 12 without heat dissipation fins 4. The provision of multiple heat dissipation fins 4 extends the service life of the lighting unit 3 and also ensures the stability of the luminous efficiency of the lighting unit 3 under long-term lighting operation.

[0033] Furthermore, at least one of the first main body 11 and the second main body 12 is provided with a heat dissipation channel that runs through the second horizontal direction on its side wall. The heat dissipation channel is provided with an air circulation cooling pipe or a water circulation cooling pipe, which facilitates the active heat dissipation of the lighting unit 3, further improves the heat dissipation efficiency of the lighting unit 3 under long-term lighting operation, and enhances the heat dissipation effect of the lighting unit 3.

[0034] Optionally, the first light-blocking portions 21 protruding from the first main body 11 and the second main body 12 are spaced apart along a first horizontal direction. The diffuse reflection illumination device also includes a camera mounting base 5, which is connected to the top surface of the two first light-blocking portions 21. The camera mounting base 5's connection to the top surface of the first light-blocking portions 21 on the first main body 11 and the second main body 12 effectively utilizes the top space of the first main body 11 and the second main body 12, improving the structural integration between the camera mounted on the camera mounting base 5 and the device body 1. Furthermore, compared to other locations, the camera mounting base 5's placement on the top surface of the first light-blocking portions 21 avoids blocking diffuse reflection light. The spaced arrangement of the first light-blocking portions 21 on the first main body 11 and the second main body 12 facilitates the camera mounted on the camera mounting base 5 in capturing images of the object to be illuminated below the device body 1 using this spacing, reducing the difficulty of capturing images of the object to be illuminated.

[0035] Specifically, the distance between the two first light-blocking parts 21 along the first horizontal direction is not less than 2mm, so as to avoid the camera's field of view being limited due to the small distance between the two first light-blocking parts 21, thereby improving the convenience of the camera in shooting the illuminated object, improving the shooting effect and quality of the camera on the illuminated object, and ensuring the accuracy of the results of subsequent characteristic evaluation of the illuminated object based on the captured images.

[0036] More specifically, when the top surfaces of the first main body 11 and the second main body 12 are provided with multiple heat dissipation fins 4, the height of the heat dissipation fin 4 on the side closer to the camera mounting base 5 is less than the height of the heat dissipation fin 4 on the side farther from the camera mounting base 5, thereby reducing structural interference between the camera and the heat dissipation fin 4 during camera installation, reducing the difficulty of camera installation, and ensuring the reliability of camera installation and shooting.

[0037] In this embodiment, the lighting unit 3 includes a PCB board 31, a connector 32, and a lighting strip 33. The connector 32 is disposed on and electrically connected to the lighting strip 33, and is plugged into the PCB board 31. Compared to connecting the lighting strip 33 with a custom-made dedicated cable, the standardized connector 32 on the lighting strip 33, which can be plugged into the PCB board 31, reduces the installation difficulty of the lighting unit 3. Operators can complete the overall installation of the lighting unit 3 using standard wiring harnesses, reducing labor installation costs and improving the installation efficiency and reliability of the lighting unit 3. It is understood that in this embodiment, the lighting strip 33 extends along the second horizontal direction and its lighting surface is arranged perpendicular to the horizontal plane. The length of the lighting strip 33 along the first horizontal direction is less than the length of the second light-blocking part 22 protruding from the device body 1 along the first horizontal direction. The length of the lighting strip 33 along the second horizontal direction is less than the extension length of the second light-blocking part 22 along the second horizontal direction. That is, the lighting strip 33 on the side of the first main body 11 is completely installed in the installation space enclosed by the first light-blocking part 21, the corresponding second light-blocking part 22 and the first main body 11 on that side. The lighting strip 33 on the side of the second main body 12 is completely installed in the installation space enclosed by the first light-blocking part 21, the corresponding second light-blocking part 22 and the second main body 12 on that side, so as to avoid the lighting strip 33 set on the side of the first main body 11 or the side of the second main body 12 directly shining on the object to be illuminated below the device body 1.

[0038] Optionally, the connector 32 is equipped with industrially standard 2mm pitch pins, including at least two pins, a positive and a negative terminal. It can also add functional pins such as strobe trigger and / or signal ground. The pins can be designed to prevent incorrect insertion.

[0039] Specifically, such as Figure 1 and Figure 3 As shown, the second light-blocking part 22 is provided with an avoidance notch 221 along the first horizontal direction, and the PCB board 31 can be inserted into the connector 32 along the first horizontal direction via the avoidance notch 221. The avoidance notch 221 reduces the difficulty of inserting the PCB board 31 and the connector 32, improves the convenience and reliability of inserting the PCB board 31 and the connector 32, reduces the structural interference between the two and the second light-blocking part 22 during the insertion process, reduces the overall area occupied by the lighting unit 3, and improves the integration of the lighting unit 3 and the light-blocking unit 2.

[0040] Optionally, such as Figure 1 and Figure 2 As shown, both the first main body 11 and the second main body 12 have chamfers 13 at their bottoms on opposite sides along the first horizontal direction. The chamfers 13 at their bottoms on opposite sides reduce the risk of stress concentration in the device body 1 and also improve heat dissipation at the bottom of the device body 1.

[0041] For example, both the first main body 11 and the second main body 12 are made of aluminum alloy. Aluminum alloy is lightweight, high-strength, highly corrosion-resistant, and has high thermal conductivity. The fact that both the first main body 11 and the second main body 12 are made of aluminum alloy can effectively improve the thermal conductivity of the device body 1 during the operation of the lighting unit 3, prevent the lighting unit 3 from operating at overheated temperatures, extend the service life of the lighting unit 3, and also enhance the structural strength and corrosion resistance of the device body 1, improve the structural stability of the device body 1, and extend the service life of the device body 1.

[0042] Specifically, the diffuse reflection layer provided in the first light-blocking part 21 and the second light-blocking part 22 can both be made of aluminum alloy. The first main body 11, the second main body 12 and the light-blocking unit 2 respectively provided on the sides of the first main body 11 and the second main body 12 are processed by an integral molding process. The first main body 11 and the second main body 12 are connected by a bridging structure. The device body 1 and the light-blocking unit 2 have strong structural integrity, low processing difficulty and high processing efficiency.

[0043] In some embodiments, the first main body 11 and the second main body 12, both with cross-sections perpendicular to the first horizontal direction, are inverted L-shaped, resulting in low processing difficulty and strong structural stability. In other embodiments, the cross-sections of the first main body 11 and the second main body 12 are both arc-shaped, occupying a small area and improving integration with other visual inspection components.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A diffuse reflection lighting device, characterized in that, include: The main body of the device (1) includes a first main body part (11) and a second main body part (12) that are spaced apart along a first horizontal direction; The light-blocking unit (2) includes a first light-blocking part (21) and a second light-blocking part (22) that both extend along a second horizontal direction and are provided with a diffuse reflection layer. The second horizontal direction is perpendicular to the first horizontal direction. The first main body part (11) and the second main body part (12) are both provided with the first light-blocking part (21) and the second light-blocking part (22) on the side that is close to each other along the first horizontal direction. The second light-blocking part (22) is provided below the first light-blocking part (21) in a corresponding manner. The length of the second light-blocking part (22) protruding from the device body (1) along the first horizontal direction is less than the length of the corresponding first light-blocking part (21) protruding from the device body (1) along the first horizontal direction. A mounting space is formed between a corresponding first light-blocking part (21) and a second light-blocking part (22). Lighting unit (3), the lighting unit (3) is installed in the installation space. The direct light of the lighting unit (3) can be intercepted by the first light blocking part (21) and the second light blocking part (22) on the side that are close to each other, so that the direct light forms diffuse reflection light under the reflection of the diffuse reflection layer and illuminates the object to be illuminated below the main body (1) of the device.

2. The diffuse reflection lighting device according to claim 1, characterized in that, The top surfaces of the first main body (11) and the second main body (12) are provided with a plurality of heat dissipation fins (4) spaced apart along the first horizontal direction, and each heat dissipation fin (4) extends along the second horizontal direction.

3. The diffuse reflection lighting device according to claim 1, characterized in that, The first main body (11) and the second main body (12) are each provided with a first light-blocking part (21) that protrudes along the first horizontal direction and are spaced apart. The diffuse reflection lighting device also includes a camera mounting base (5), which is connected to the top surface of the two first light-blocking parts (21).

4. The diffuse reflection lighting device according to claim 3, characterized in that, The distance between the two first light-blocking parts (21) along the first horizontal direction is not less than 2 mm.

5. The diffuse reflection lighting device according to claim 1, characterized in that, The lighting unit (3) includes a PCB board (31), a connector (32) and a lighting strip (33). The connector (32) is disposed on the lighting strip (33) and electrically connected to the lighting strip (33), and the connector (32) is plugged into the PCB board (31).

6. The diffuse reflection lighting device according to claim 5, characterized in that, The second light-blocking part (22) is provided with a clearance notch (221) along the first horizontal direction, and the PCB board (31) can be inserted into the connecting joint (32) along the first horizontal direction via the clearance notch (221).

7. The diffuse reflection lighting device according to any one of claims 1-6, characterized in that, The first light-blocking part (21) and the second light-blocking part (22) are provided with a plurality of light-blocking protrusions on the side that are close to each other, and each light-blocking protrusion is provided with the diffuse reflection layer.

8. The diffuse reflection lighting device according to any one of claims 1-6, characterized in that, Both the first main body (11) and the second main body (12) have chamfers (13) at the bottom of their respective sides along the first horizontal direction.

9. The diffuse reflection lighting device according to any one of claims 1-6, characterized in that, Both the first main body (11) and the second main body (12) are made of aluminum alloy.

10. The diffuse reflection lighting device according to any one of claims 1-6, characterized in that, The first main body (11) and the second main body (12) are both inverted L-shaped or arc-shaped in cross-section perpendicular to the first horizontal direction.

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