Low cost side emitting area light source

Abstract

The utility model discloses a low -cost side light emitting surface light source, including surface light source body, the surface light source body includes bottom plate and frame, the bottom plate is surrounded with frame and forms the accommodation cavity, is equipped with the PCB board on the both sides of accommodation cavity, a plurality of LED lamp pearl are integrated on the PCB board, the light emitting surface one side of LED lamp pearl is equipped with light guide plate, the light guide plate is closely combined with the light emitting surface of LED lamp pearl, is equipped with the diffusion plate on the light guide plate, be equipped with a plurality of first location interposing plate on the frame, first location interposing plate limits diffusion plate, still be equipped with a plurality of second location interposing plate on the frame, the second location interposing plate and PCB board cooperation limit light guide plate, the bottom plate and frame pass through bolt connection, and the diffusion plate and light guide plate in the inside are fixed, the utility model discloses through the structure of simplifying frame, adopts the mode of cooperation of interposing and bolt connection and realizes quick assembly, effectively reduces assembly difficulty and production cost.

Description

Technical Field

[0001] This utility model relates to the field of surface light source technology, and in particular to a low-cost side-emitting surface light source. Background Technology

[0002] In the field of backlighting for widely used machine vision equipment, some backlights employ a side-emitting surface light source structure design. This type of structure typically places LED beads within the frame surrounding the light guide plate. During operation, the light emitted by the LED beads first enters a specially designed light-incident surface at the outer edge of the light guide plate. Subsequently, this light undergoes multiple complex reflections and scattering processes within the light guide plate and between the reflective film, ultimately forming a uniform surface light source to meet the illumination requirements of the machine vision device.

[0003] However, a careful analysis of existing side-emitting surface light source structures reveals several significant problems in practical applications. Specifically, the relatively complex design and cumbersome assembly process make disassembly and reinstallation extremely difficult during maintenance. Furthermore, this complex structure significantly impacts assembly efficiency during manufacturing, resulting in a prolonged production process. This low assembly efficiency directly leads to high production costs, posing a critical challenge for large-scale production and widespread application. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of complex structure and high production cost in the prior art, and to provide a low-cost side-emitting surface light source. This surface light source simplifies the frame structure and uses a combination of plug-in and bolt connection to achieve rapid assembly, effectively reducing assembly difficulty and production cost.

[0005] To achieve the above objectives, this utility model provides a low-cost side-emitting surface light source, comprising a surface light source body, the surface light source body including a base plate at the bottom and a frame at the top; the base plate and the frame together form an accommodating cavity, PCB boards are mounted on both sides of the accommodating cavity, multiple LED beads are integrated on the PCB boards, a light guide plate is mounted on one side of the emitting surface of each LED bead, the light guide plate is in close contact with the emitting surface of the LED bead, a diffuser plate is mounted on the light guide plate, a plurality of first positioning plug-in plates are provided on the frame, the first positioning plug-in plates limit the diffuser plate, a plurality of second positioning plug-in plates are also provided on the frame, the second positioning plug-in plates and the PCB board cooperate to limit the light guide plate, the base plate and the frame are connected by bolts to fix the internal diffuser plate and light guide plate.

[0006] Preferably, a thermally conductive silicone pad is installed on the side of the PCB board away from the LED beads. The thermally conductive silicone pad is tightly attached between the PCB board and the frame. One side of the thermally conductive silicone pad is attached to the frame, and the other side is attached to the PCB board to fix the PCB board.

[0007] Preferably, the frame has an L-shaped cross-section with a through groove in the middle. The through groove is located on one side of the diffuser plate. The LED beads emit light horizontally, which is guided by the side of the light guide plate and uniformly conducted inside the light guide plate. The light is then diffused to form a uniform surface light source, and the emitted light from the surface light source passes through the through groove and is emitted outward.

[0008] Preferably, both the diffuser plate and the light guide plate are square, and the area of ​​the light guide plate is larger than the area of ​​the diffuser plate; the height of the first positioning plug-in plate is lower than the height of the diffuser plate, and the light guide plate covers the diffuser plate and the first positioning plug-in plate.

[0009] Preferably, four first positioning plug-in plates are provided, which are distributed on the four sides of the diffuser plate respectively; the first positioning plug-in plate is provided with a first protrusion, and the frame is provided with a first receiving groove adapted to the first protrusion. The first protrusion is inserted into the first receiving groove to position the diffuser plate.

[0010] Preferably, four second positioning plug-in plates are provided, which are respectively distributed on both sides of the light guide plate. The second positioning plug-in plate is provided with a second protrusion, and the frame is provided with a second receiving groove that is adapted to the second protrusion. The second protrusion is inserted into the second receiving groove and, together with the PCB board, positions the light guide plate.

[0011] Preferably, the frame is further provided with a plurality of third positioning plug-in plates, and four third positioning plug-in plates are provided, which are respectively distributed at the four vertices of the frame; the third positioning plug-in plates are L-shaped, and one side of the third positioning plug-in plate limits the PCB board, and the other side limits the light guide plate.

[0012] Preferably, the third positioning plug plate is provided with a third protrusion, and the frame is provided with a third receiving groove adapted to the third protrusion, and the third protrusion is inserted into the third receiving groove.

[0013] Preferably, the surface light source body also includes a power cord, which passes through the frame and is electrically connected to the PCB board to provide power to the LED beads and drive the LED beads to emit light.

[0014] Preferably, the four vertices of the frame are provided with connecting posts, the connecting posts are provided with internal threads, the base plate is provided with a first through hole corresponding to the connecting post, the first through hole is provided with a connecting bolt, one end of the connecting bolt passes through the first through hole and is threadedly connected to the connecting post; the base plate is provided with a plurality of annular posts, the frame is provided with a second through hole corresponding to the annular post, the annular post is provided with a connecting bolt, the connecting bolt passes through the annular post to fix the surface light source body.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Fixing principle of this utility model: First, the PCB board and LED beads are limited by the accommodating cavity, and the PCB board and LED beads are fixed together with the light guide plate; Second, the light guide plate is limited by several second positioning plug-in plates in conjunction with the PCB board, and the diffuser plate is limited by several first positioning plug-in plates; Finally, the base plate and the frame cover each other and are connected by bolts to fix themselves and the internal diffuser plate and light guide plate.

[0017] 2. The frame of this utility model is formed into an L-shape by bending and then connected end to end by welding to form a square, thereby reducing the number of parts and assembly steps and reducing manufacturing costs; furthermore, the surface light source body adopts a combination of plug-in and bolt connection to achieve rapid assembly, effectively reducing assembly difficulty and production costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a low-cost side-emitting surface light source provided by this utility model;

[0020] Figure 2 This is an exploded view of a low-cost side-emitting surface light source provided by this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of a low-cost side-emitting surface light source provided by this utility model;

[0022] Figure 4 This is a longitudinal sectional view of a low-cost side-emitting surface light source provided by this utility model;

[0023] Figure 5 This is a schematic diagram of the bottom structure of the frame provided by this utility model;

[0024] Figure 6 This is a schematic diagram of a low-cost side-emitting surface light source with frame removal provided by this utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the PCB board and the thermally conductive silicone pad bonded together according to this utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the first positioning plug-in plate provided by this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the second positioning plug-in plate provided by this utility model;

[0028] Figure 10 This is a structural schematic diagram of the third positioning plug-in plate provided by this utility model.

[0029] The diagram includes:

[0030] 9. Surface light source body; 1. Base plate; 2. Frame; 3. Receiving cavity; 4. PCB board; 5. LED lamp bead; 6. Light guide plate; 7. Diffuser plate; 21. First positioning plug-in plate; 22. Second positioning plug-in plate; 41. Thermal conductive silicone pad; 26. Through groove; 211. First protrusion; 212. First receiving groove; 221. Second protrusion; 222. Second receiving groove; 23. Third positioning plug-in plate; 231. Third protrusion; 232. Third receiving groove; 8. Power cord; 24. Connecting post; 11. First through hole; 12. Annular post; 25. Second through hole. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 10 This invention provides a low-cost side-emitting surface light source.

[0033] like Figure 1As shown, the surface light source body 9 includes a base plate 1 at the bottom and a frame 2 at the top; the base plate 1 and the frame 2 cover each other and are connected together by bolts, and the four sides of the base plate 1 and the frame 2 together form a receiving cavity 3 for accommodating internal components; in this embodiment, there are two PCB boards 4, which are symmetrically installed on the left and right inner walls of the receiving cavity 3, and each PCB board 4 has an array of multiple LED beads 5; in other embodiments, the PCB board can also be set as a single or four, and the layout can be adjusted according to the actual light emission requirements.

[0034] In this embodiment, the frame 2 has an L-shaped cross-section, forming an inverted U-shaped accommodating cavity 3 with the base plate 1. To fix the PCB board 4, the PCB board 4 and the frame 2 can be fixedly connected by bolts, or a snap-fit ​​structure can be used for quick assembly. However, in this embodiment, a thermally conductive silicone pad 41 is installed on the side of the PCB board 4 away from the LED beads 5. The thermally conductive silicone pad 41 is tightly attached between the PCB board 4 and the frame 2. The adhesion of the thermally conductive silicone pad 41 achieves a stable connection between the PCB board 4 and the frame 2, while improving heat dissipation efficiency. One side of the thermally conductive silicone pad 41 is attached to the frame 2, and the other side is attached to the PCB board 4 to fix the PCB board 4.

[0035] Furthermore, the thermally conductive silicone pad 41 fills the gaps, contacting not only the frame 2 but also the base plate 1. This allows heat to be conducted from the PCB board 4 to the frame 2 and the base plate 1 via the thermally conductive silicone pad 41, forming a dual heat dissipation path and effectively reducing the temperature of the LED beads 5 during operation.

[0036] Furthermore, both the frame 2 and the base plate 1 are made of thermally conductive metal materials, such as aluminum alloy, copper, or stainless steel, to further improve the overall heat dissipation performance; several heat dissipation grooves extending along the length direction can also be opened on the side of the frame 2 to increase the contact area with the air and accelerate heat convection.

[0037] like Figure 4 As shown, a light guide plate 6 is installed on one side of the light-emitting surface of the LED bead 5. The light guide plate 6 is closely attached to the light-emitting surface of the LED bead 5 to convert and conduct the point light source, making the light more uniform. Furthermore, a diffuser plate 7 is installed on the light guide plate 6, which further scatters the light, improves the uniformity of light output, and reduces bright spots and dark areas.

[0038] The diffuser plate 7 is square, and its four sides are limited by four first positioning plug-in plates 21. The first positioning plug-in plates 21 are plugged into the frame 2 to achieve assembly. A light guide plate 6 is covered on the top of the diffuser plate 7. The light guide plate 6 is limited on both sides by second positioning plug-in plates 22, and on the other two sides by PCB board 4, thereby limiting the light guide plate 6 around its perimeter. Similarly, the second positioning plug-in plates 22 are plugged into the frame 2 to achieve assembly, thereby achieving rapid assembly. At this time, the light guide plate 6 and the diffuser plate 7 are limited in the four directions of front, back, left, and right, but are still free in the vertical direction. Therefore, they need to be fixed in the vertical direction. In this embodiment, the base plate 1 and the frame 2 are fitted together and connected by bolts. During the fitting process, the internal diffuser plate 7 and light guide plate 6 are also pressed and fixed in the vertical direction to achieve a stable assembly of the overall structure. The tight fit between the base plate 1 and the frame 2 ensures that the internal components remain stable under vibration or impact, avoiding loosening or displacement.

[0039] In this embodiment, both the base plate 1 and the frame 2 are made of stainless steel. The base plate 1 is a flat plate that can be simply stamped and formed. The frame 2 is formed by bending to make its cross-section L-shaped. It is then connected by bending and welding at both ends to form a square shape. A through groove 26 is provided in the middle. The through groove 26 is located on one side of the diffuser plate 7 and is in contact with the diffuser plate 7. It is used to limit the vertical displacement of the diffuser plate 7 and enhance the structural stability.

[0040] In this embodiment, the LED beads 5 emit light horizontally, which is guided by the side of the light guide plate 6 and uniformly conducted inside the light guide plate 6. Then, it forms a uniform surface light source through the diffuser plate 7. The emitted light from the surface light source passes through the through groove 26 and is emitted outward.

[0041] In this embodiment, as Figure 2 As shown, both the diffuser plate 7 and the light guide plate 6 are square. The area of ​​the through groove 26 is smaller than the area of ​​the diffuser plate 7, ensuring that the edge of the diffuser plate 7 is effectively limited. The area of ​​the light guide plate 6 is larger than the area of ​​the diffuser plate 7. At the same time, the height of the first positioning plug plate 21 is lower than the height of the diffuser plate 7, so that the light guide plate 6 can cover the diffuser plate 7 and the first positioning plug plate 21, and realize the pressing and fixing of the diffuser plate 7, ensuring that the two fit tightly and reducing light loss.

[0042] like Figure 2As shown, four first positioning plug-in plates 21 are provided, respectively distributed on the four sides of the diffuser plate 7, and used to limit the four sides of the diffuser plate 7. Each first positioning plug-in plate 21 has two first protrusions 211. Correspondingly, the frame 2 has first receiving grooves 212 adapted to the first protrusions 211. The first protrusions 211 are inserted into the first receiving grooves 212, fixing the first positioning plug-in plates 21 and firmly limiting the four sides of the diffuser plate 7. Furthermore, if it is desired to strengthen the connection between the first positioning plug-in plates 21 and the frame 2, welding or bonding processes can be used at the connection point to form a strong mechanical connection between the first protrusions 211 and the first receiving grooves 212.

[0043] The height of the first positioning plug plate 21 is less than the thickness of the diffuser plate 7, so as to ensure that during the locking process between the base plate 1 and the frame 2, the light guide plate 6 can cover the diffuser plate 7 and the first positioning plug plate 21 without scratching.

[0044] like Figure 6 As shown, in this embodiment, four second positioning plug-in plates 22 are provided, which are respectively distributed on both sides of the light guide plate 6, with two on each side, arranged symmetrically, for limiting the side of the light guide plate 6; the other two sides are limited by the PCB board 4 to ensure that the position of the light guide plate 6 is limited in the horizontal direction and to prevent it from shifting during the assembly process.

[0045] Similarly, the second positioning plug plate 22 is provided with two second protrusions 221, and the frame 2 is provided with a second receiving groove 222 that is adapted to the second protrusions 221. The second protrusions 221 are inserted into the second receiving groove 222 and cooperate with the PCB board 4 to limit the light guide plate 6.

[0046] Similarly, the connection between the second positioning plug plate 22 and the frame 2 can be achieved by welding or bonding; the second positioning plug plate 22 is disposed outside the first positioning plug plate 21.

[0047] To enhance the positioning of the PCB board 4 and the light guide plate 6, a third positioning plug-in plate 23 is also provided in this embodiment. Four third positioning plug-in plates 23 are provided, located at the four vertices of the frame 2, such as... Figure 10 As shown, one is provided at each vertex of the frame. The third positioning plug-in plate 23 is L-shaped. One side of the third positioning plug-in plate 23 limits the PCB board 4, and the other side limits the light guide plate 6.

[0048] When the PCB board 4 detaches from the thermally conductive silicone pad 41, the third positioning plug plate 23 can limit the displacement of both ends of the PCB board 4. The third positioning plug plate 23 can also prevent the light guide plate 6 from impacting the PCB board 4, causing damage to the PCB board 4 and the LED beads 5. At the same time, the L-shaped structure of the third positioning plug plate 23 effectively enhances the overall structural strength at the apex of the frame.

[0049] Similar to the second positioning plug-in plate 22, the third positioning plug-in plate 23 has two third protrusions 231, spaced apart and perpendicular to each other. The frame 2 has a third receiving groove 232 that matches the third protrusions 231. The third protrusions 231 are inserted into the third receiving groove 232, achieving a stable connection between the third positioning plug-in plate 23 and the frame 2, ensuring positioning accuracy and structural reliability. Through the plugging and mating of the protrusions and grooves, combined with welding or bonding processes, the connection strength is further improved, effectively preventing loosening caused by long-term vibration or thermal expansion and contraction.

[0050] like Figure 6 As shown, the surface light source body 9 also includes a power line 8, which passes through the frame 2 and is electrically connected to the PCB board 4 to provide power to the LED beads 5 and drive them to emit light. The power line 8 can also be electrically connected to the PCB board 4 on the other side through the wiring channel inside the accommodating cavity 3 to provide power, so that the LED beads 5 on both sides can be driven to emit light simultaneously, achieving uniform illumination.

[0051] like Figure 5 As shown, in order to bolt the frame 2 and the base plate 1 together, connecting posts 24 are provided at the four vertices of the frame 2. The connecting posts 24 have internal threads and can be welded to the frame 2. The base plate 1 has a first through hole 11 corresponding to the connecting post 24. A connecting bolt is installed in the first through hole 11, and one end of the connecting bolt passes through the first through hole 11 and is threaded to the connecting post 24. Through this bolt connection method, a firm assembly between the frame 2 and the base plate 1 is achieved, ensuring the overall structure is stable and reliable. It also fixes the internal light guide plate 6 and diffuser plate 7, and forms an internal accommodating cavity 3, providing a safe and stable installation space for each component.

[0052] like Figure 6As shown, to fix the surface light source body 9 to the external mounting surface, the base plate 1 is equipped with several annular posts 12. These annular posts 12 are inserted into the receiving cavity 3, with the internal parts of the receiving cavity 3 avoiding the annular posts 12 to ensure no interference during assembly. The frame 2 is provided with second through holes 25 corresponding to the annular posts 12. Connecting bolts are installed inside the annular posts 12, passing through them to fix the surface light source body 9. The cooperation of the annular posts 12 and the connecting bolts achieves a stable fixation of the surface light source body 9 to the external mounting surface, while also facilitating disassembly and maintenance.

[0053] Assembly steps of the surface light source body 9:

[0054] Step S1: The stainless steel plate is bent into an L-shaped cross section, and then bent and welded together at both ends to form a square shape. A through groove 26 is provided in the middle, and connecting posts 24 are welded to the four vertices of the frame 2 to form the frame 2.

[0055] Step S2: Arrange the LED beads 5 array on the PCB board 4. A thermal conductive silicone pad 41 is attached to the bottom surface of the PCB board 4. The thermal conductive silicone pad 41 is attached to the inside of the frame 2 to complete the fixation of the PCB board 4.

[0056] Step S3: The power line 8 passes through the frame 2 and is electrically connected to the PCB board 4 to provide power to the LED beads 5 and drive the LED beads 5 to emit light;

[0057] Step S4: Cover the through groove 26 with the diffused plate 7, insert the first protrusion 211 into the first receiving groove 212, fix the first positioning plug plate 21, and also firmly limit the four sides of the diffused plate 7.

[0058] Step S5: Cover the light guide plate 6 on the diffuser plate 7 and the first positioning plug plate 21, insert the second protrusion 221 into the second receiving groove 222, and cooperate with the PCB board 4 to limit the position of the light guide plate 6;

[0059] Step S6: The third protrusion 231 is inserted into the third receiving groove 232 to achieve a stable connection between the third positioning plug plate 23 and the frame 2. The third positioning plug plate 23 limits the PCB board 4 on one side and limits the light guide plate 6 on the other side.

[0060] Step S7: The base plate 1 is placed on the frame 2, and one end of the connecting bolt passes through the first through hole 11 and is threaded to the connecting post 24; through this bolt connection method, the frame 2 and the base plate 1 are firmly assembled, ensuring the overall structure is stable and reliable; it also fixes the internal light guide plate 6 and the diffuser plate 7.

[0061] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A low-cost side-emitting surface light source, characterized in that: The light source includes a surface light source body (9), which includes a bottom plate (1) at the bottom and a frame (2) at the top; the bottom plate (1) and the frame (2) together form a cavity (3), and PCB boards (4) are installed on both sides of the cavity (3). Multiple LED beads (5) are integrated on the PCB board (4), and a light guide plate (6) is installed on one side of the light-emitting surface of the LED beads (5). The light guide plate (6) is in close contact with the light-emitting surface of the LED beads (5). The light guide plate (6) is equipped with a diffuser plate (7), and the frame (2) is provided with a plurality of first positioning plug-in plates (21). The first positioning plug-in plates (21) limit the diffuser plate (7). The frame (2) is also provided with a plurality of second positioning plug-in plates (22). The second positioning plug-in plates (22) and the PCB board (4) cooperate to limit the light guide plate (6). The base plate (1) and the frame (2) are connected by bolts to fix the diffuser plate (7) and the light guide plate (6) inside.

2. The low-cost side-emitting surface light source according to claim 1, characterized in that: A thermally conductive silicone pad (41) is installed on the side of the PCB board (4) away from the LED beads (5). The thermally conductive silicone pad (41) is tightly attached between the PCB board (4) and the frame (2). The frame (2) is attached to one side of the thermally conductive silicone pad (41), and the other side is attached to the PCB board (4) to fix the PCB board (4).

3. A low-cost side-emitting surface light source according to claim 1, characterized in that: The frame (2) has an L-shaped cross section and a through groove (26) in the middle. The through groove (26) is located on one side of the diffuser plate (7). The LED beads (5) emit light horizontally, which is guided through the side of the light guide plate (6) and uniformly conducted inside the light guide plate (6). The light source is formed by the diffuser plate (7) and the emitted light from the surface light source passes through the through groove (26) and shines outward.

4. A low-cost side-emitting surface light source according to claim 1, characterized in that: Both the diffuser plate (7) and the light guide plate (6) are square, and the area of ​​the light guide plate (6) is larger than the area of ​​the diffuser plate (7). The height of the first positioning plug-in plate (21) is lower than the height of the diffuser plate (7), and the light guide plate (6) covers the diffuser plate (7) and the first positioning plug-in plate (21).

5. A low-cost side-emitting surface light source according to claim 4, characterized in that: The first positioning plug-in plate (21) is provided in four parts, which are distributed on the four sides of the diffuse plate (7); the first positioning plug-in plate (21) is provided with a first protrusion (211), and the frame (2) is provided with a first receiving groove (212) that is adapted to the first protrusion (211). The first protrusion (211) is inserted into the first receiving groove (212) to position the diffuse plate (7).

6. A low-cost side-emitting surface light source according to claim 5, characterized in that: Four second positioning plug-in plates (22) are provided, which are distributed on both sides of the light guide plate (6). The second positioning plug-in plate (22) is provided with a second protrusion (221). The frame (2) is provided with a second receiving groove (222) that is adapted to the second protrusion (221). The second protrusion (221) is inserted into the second receiving groove (222) and, together with the PCB board (4), positions the light guide plate (6).

7. A low-cost side-emitting surface light source according to claim 1, characterized in that: The frame (2) is also equipped with several third positioning plug-in plates (23). There are four third positioning plug-in plates (23), which are distributed at the four vertices of the frame (2). The third positioning plug-in plates (23) are L-shaped. One side of the third positioning plug-in plate (23) limits the PCB board (4), and the other side limits the light guide plate (6).

8. A low-cost side-emitting surface light source according to claim 7, characterized in that: The third positioning plug plate (23) is provided with a third protrusion (231), and the frame (2) is provided with a third receiving groove (232) adapted to the third protrusion (231). The third protrusion (231) is inserted into the third receiving groove (232).

9. A low-cost side-emitting surface light source according to claim 1, characterized in that: The surface light source body (9) also includes a power line (8), which passes through the frame (2) and is electrically connected to the PCB board (4) to provide power to the LED beads (5) and drive the LED beads (5) to emit light.

10. A low-cost side-emitting surface light source according to claim 1, characterized in that: Connecting posts (24) are provided at the four vertices of the frame (2). The connecting posts (24) have internal threads. The base plate (1) has a first through hole (11) corresponding to the connecting post (24). A connecting bolt is installed in the first through hole (11). One end of the connecting bolt passes through the first through hole (11) and is threaded to the connecting post (24). A plurality of annular posts (12) are installed on the base plate (1). The frame (2) has a second through hole (25) corresponding to the annular post (12). A connecting bolt is installed in the annular post (12). The connecting bolt passes through the annular post (12) to fix the surface light source body (9).

Images