Positioning device for LED substrate patch

Abstract

This invention relates to the field of LED substrate manufacturing technology, and more particularly to a positioning device for LED substrate mounting, comprising a base, a worktable, a guide plate, a positioning plate, fixed seats, and sliding columns. The worktable is connected to the base, and the guide plate is connected to the center of the worktable. A guide groove is formed on the guide plate, and the positioning plate is slidably connected to the guide plate through the guide groove. A positioning assembly is connected to the guide plate. Two fixed seats are connected to the front of the base, and sliding columns are slidably connected to the adjacent sides of each fixed seat. This invention includes a fixed ring, a rotating ring, a top column, a fixed ring, an insert column, a wedge block, a connecting plate, and a first spring. It can prevent excessive rotation of the top column from causing the wedge block to squeeze and damage the substrate, automatically adjust the contact angle and pressure between the wedge block and the sidewall of the substrate, ensure that substrates of different shapes can be firmly clamped, and avoid displacement or uneven soldering caused by irregular substrate shapes. It is suitable for positioning irregularly shaped substrates.

Description

Technical Field

[0001] This invention relates to the field of LED substrate manufacturing technology, and in particular to a positioning device for LED substrate mounting. Background Technology

[0002] The LED substrate mounting process is one of the key steps in manufacturing LED lamps or displays. First, a layer of solder paste is applied to the substrate using stencil printing technology. This solder paste is used to fix and electrically connect the LED chips. A high-precision pick-and-place machine then places the LED chips and other surface-mount components onto the solder paste according to the design requirements. The entire process requires a high degree of precision to ensure that each component is correctly aligned and firmly adhered. After mounting, the PCB passes through a reflow oven, where the solder in the solder paste is heated to its melting point and, upon cooling, forms a strong electrical connection. Finally, quality inspection is performed, including checking the quality of the solder joints and conducting electrical performance tests to ensure the reliability and stability of the finished LED lamp.

[0003] When using a small soldering machine for manual soldering, it is usually necessary to design a simple positioning plate or fixture according to the different sizes of the substrate to fix the substrate and control the soldering position. However, every time the substrate specification is changed, the fixture needs to be remade or adjusted, which not only increases the production preparation time, but also reduces the applicability and flexibility of the equipment. When placing the substrate, the operator needs to manually straighten and align it. Even a slight deviation will affect the soldering effect, resulting in uneven solder joints or missed soldering, which affects product quality and consistency. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a positioning device for LED substrate mounting.

[0005] A positioning device for LED substrate mounting includes a base, a worktable, a guide plate, a positioning plate, fixed seats, sliding columns, a connecting rod, a steel mesh, a pull rod, a rotating assembly, a fixed ring, a rotating ring, a top column, a fixed ring, an insert column, and a positioning assembly. The worktable is connected to the base, and the guide plate is connected to the center of the worktable. A guide groove is formed on the guide plate, and the positioning plate is slidably connected to the guide plate through the guide groove. The positioning assembly is connected to the guide plate. Two fixed seats are connected to the front of the base, and sliding columns are slidably connected to the adjacent sides of each fixed seat. The two sliding columns rotate between each other. The connection has a connecting rod that can only rotate 90 degrees. A pull rod is rotatably connected to a fixed base on one side. The pull rod is fixedly connected to the connecting rod. A steel mesh is detachably connected to the connecting rod. There are two fixed rings that slide and rotate on both sides of the middle of the worktable. Each fixed ring has a rotating ring rotatably connected to it. Each rotating ring has a top post connected to it. The bottom of the top post is higher than the top of the positioning plate. Each fixed ring has a fixed ring connected inside it. There are insertion holes spaced apart along the circumference of the fixed ring. Insertion posts that fit the insertion holes are slidably connected to the inner wall of the fixed ring. A rotating component connects the connecting rod and the fixed ring.

[0006] Furthermore, the rotating assembly includes a fixed rod, a pressure rod, a connecting block, a rack, a gear ring, a second guide rod, and a fourth spring. Two fixed rods are connected to the bottom of the connecting rod. Connecting blocks are slidably connected to both the left and right sides of the worktable. Pressure rods are connected to the rear of each connecting block. The sides of the pressure rods that are close to each other are in contact with the fixed rods. The rear sides of the left and right pressure rods are close to each other, inclined, and extend vertically upward. The sides of the left and right connecting blocks that are far apart from each other are slidably connected to the second guide rods. The second guide rods are fixedly connected to the worktable. A fourth spring is connected between the second guide rods and the connecting blocks. Two racks are connected to the sides of the left and right connecting blocks that are far apart from each other. Gear rings are connected to the bottom of each fixed ring. The racks mesh with the gear rings.

[0007] Furthermore, it also includes a connecting plate, a first spring, and a wedge block. Each insert post is connected to a connecting plate, and the connecting plates are slidably connected to the top post. Each connecting plate is connected to a first spring between it and the fixing ring. Each top post is slidably connected to a wedge block, and the connecting plates are located on the inclined surface of the wedge block.

[0008] Furthermore, it also includes a sliding rod and a second spring. The wedge block and the top column are slidably connected by a sliding rod, and the wedge block and the sliding rod are connected by a second spring.

[0009] Furthermore, it also includes a movable seat, a two-way lead screw, and a motor. The bottom of the fixed ring is rotatably connected to the movable seat, and the movable seat is slidably connected to the worktable. The left and right movable seats are threadedly connected to the two-way lead screw, and the two-way lead screw is fixedly connected to the worktable. Two motors are installed inside the worktable, and one side of the two-way lead screw is fixedly connected to the output shaft of the motor.

[0010] Furthermore, the positioning assembly includes a first guide rod, a clamping block, a third spring, and a handle. Two sliding grooves are opened on the left and right sides of the top of the positioning plate, and the first guide rod is connected in each of the sliding grooves. The clamping block is slidably connected to the first guide rod, and the front and rear clamping blocks are connected to each other. The third spring is connected between the first guide rod and the clamping block. A handle is connected to the rear side of the positioning plate.

[0011] Furthermore, the positioning component also includes an extrusion strip, a first inclined surface, and a second inclined surface. Extrusion strips are connected to both the left and right sides of the guide plate, and the middle of each extrusion strip is provided with a first inclined surface and a second inclined surface. The clamping blocks are slidably connected to the extrusion strips.

[0012] Furthermore, it also includes screws, with two screws rotatably connected to the front side of the base, both of which are threadedly connected to the sliding column.

[0013] The present invention has the following advantages: 1. The present invention is provided with a fixed ring, a rotating ring, a top post, a fixed ring, an insert post, a wedge block, a connecting plate and a first spring, which can prevent the top post from rotating excessively and causing the wedge block to squeeze and damage the substrate. It automatically adjusts the contact angle and pressure between the wedge block and the side wall of the substrate, ensuring that substrates of different shapes can be firmly clamped, avoiding displacement or uneven soldering caused by irregular substrate shape, and can be applied to the positioning of irregularly shaped substrates.

[0014] 2. The present invention also includes a positioning plate and a positioning component, which can perform initial positioning of the substrate. The positioning component can quickly and stably clamp and position the substrate without the need for manual movement of the left and right clamping blocks and repeated adjustment of the substrate position, ensuring that the substrate position is consistent each time soldering is performed.

[0015] 3. The present invention is also provided with a screw, which can be rotated to adjust the height of the steel mesh, thereby flexibly controlling the distance between the steel mesh and the guide plate, ensuring that the steel mesh can be tightly attached to the upper surface of the substrate, achieving uniform tinning, suitable for substrates of different thicknesses, and will not cause the sliding column to deviate due to the downward pressure during tinning. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the connecting rod, steel mesh, and tie rod of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the movable seat, bidirectional lead screw, and motor of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the fixed ring, rotating ring, and top column of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the socket, post, and first spring of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the wedge block, sliding rod, and second spring of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the fixing rod, pressure rod, and connecting block of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the top column, connecting plate, and wedge block of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the guide plate, positioning plate, and grip of the present invention.

[0025] Figure 10 This is a cross-sectional view of the positioning plate of the present invention.

[0026] Figure 11 This is a schematic diagram of the structure of the fixing seat, sliding column, and screw of the present invention.

[0027] The meanings of the reference numerals in the diagram are as follows: 1-Base, 2-Workbench, 3-Guide plate, 301-Guide groove, 4-Fixed seat, 5-Sliding column, 6-Connecting rod, 7-Steel mesh, 8-Pull rod, 9-Fixed rod, 10-Pressure rod, 101-Connecting block, 11-Rack, 12-Fixed ring, 13-Rotating ring, 14-Top column, 15-Moving seat, 16-Double-acting screw, 17-Motor, 18-Gear ring, 19-Fixed ring 191-Insertion hole, 20-Insertion post, 21-Connecting plate, 22-First spring, 23-Wedge block, 24-Sliding rod, 25-Second spring, 26-Positioning plate, 261-Slide groove, 27-First guide rod, 28-Clamping block, 29-Third spring, 30-Grip, 31-Extrusion strip, 311-First inclined surface, 312-Second inclined surface, 32-Screw, 33-Second guide rod, 34-Fourth spring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments 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.

[0029] A positioning device for LED substrate mounting, such as Figures 1-11As shown, the system includes a base 1, a worktable 2, a guide plate 3, a positioning plate 26, a fixed seat 4, a sliding column 5, a connecting rod 6, a steel mesh 7, a pull rod 8, a rotating assembly, a fixed ring 12, a rotating ring 13, a top column 14, a fixed ring 19, an insert column 20, a positioning assembly, a connecting plate 21, a first spring 22, a wedge block 23, a sliding rod 24, and a second spring 25. The worktable 2 is fixedly connected to the top of the base 1. The guide plate 3 is fixedly connected to the middle of the worktable 2. The top of the guide plate 3 has a guide groove 301, and the positioning plate 26 is slidably connected to the top of the guide plate 3 through the guide groove 301. A positioning assembly is connected to the guide plate 3. Two fixed seats 4 are fixedly connected to the front of the base 1. Sliding columns 5 are slidably connected to the sides of the fixed seats 4 that are close to each other. A connecting rod 6, which can only rotate 90 degrees, is rotatably connected between the two sliding columns 5. A pull rod 8 is rotatably connected to one of the fixed seats 4. The pull rod 8 is fixedly connected to the connecting rod 6. A steel mesh 7 is detachably connected to the connecting rod 6. On both sides of the center of the worktable 2, there are two sliding and rotating fixed rings 12. Each fixed ring 12 is rotatably connected to a rotating ring 13, and each rotating ring 13 is fixedly connected to a top post 14. The bottom of the top post 14 is higher than the top of the positioning plate 26. Each fixed ring 12 is fixedly connected to a fixed ring 19, with insertion holes 191 spaced circumferentially along the upper edge of the fixed ring 19. Insertion posts 20, which fit the insertion holes 191, are slidably connected to the inner wall of each fixed ring 12. The connecting rod 6 is connected to the fixed ring 12. A rotating assembly is connected between them. Each insertion post 20 is fixedly connected to a connecting plate 21. Each connecting plate 21 is slidably connected to the top post 14. Each connecting plate 21 is fixedly connected to the fixing ring 12 with a first spring 22. Each top post 14 is slidably connected to a wedge block 23. Each connecting plate 21 is located on the inclined surface of the wedge block 23. Each wedge block 23 is slidably connected to the top post 14 with a sliding rod 24. Each wedge block 23 and sliding rod 24 is fixedly connected with a second spring 25.

[0030] like Figures 1-8 As shown, the rotating assembly includes a fixed rod 9, a pressure rod 10, a connecting block 101, a rack 11, a gear ring 18, a second guide rod 33, and a fourth spring 34. The bottom of the connecting rod 6 is fixedly connected to two fixed rods 9. The left and right sides of the worktable 2 are slidably connected to the connecting blocks 101. The rear side of the connecting blocks 101 is fixedly connected to the pressure rods 10. The sides of the pressure rods 10 that are close to each other are in contact with the fixed rods 9. The rear sides of the left and right pressure rods 10 are close to each other and extend vertically upward. The sides of the left and right connecting blocks 101 that are far apart from each other are slidably connected to the second guide rods 33. The second guide rods 33 are fixedly connected to the worktable 2. The second guide rods 33 and the connecting blocks 101 are fixedly connected to the fourth spring 34. The sides of the left and right connecting blocks 101 that are far apart from each other are fixedly connected to two racks 11. The bottom of the fixed ring 12 is fixedly connected to the gear ring 18. The racks 11 mesh with the gear ring 18.

[0031] Initially, the stencil 7 and pull rod 8 are perpendicular to the base 1. The first spring 22, the second spring 25, and the fourth spring 34 are in their natural state. The inserts 20 are all inserted into the insert holes 191, and the top posts 14 are all far apart. The connecting plates 21 are all located at the bottom of the inclined surface of the wedge block 23. When the substrate needs to be tinned, the substrate is placed on the positioning plate 26, and the substrate is initially positioned by the positioning assembly. The positioning assembly is pushed to slide along the guide groove 301 between the four fixing rings 12, thus completing the substrate loading. Pulling the pull rod 8 downwards causes the connecting rod 6 to rotate 90 degrees, so that the stencil 7 rotates 90 degrees backwards to fit tightly against the top of the substrate. During this process, the fixing rod 9 rotates 90 degrees forward to press the inclined part of the pressure rod 10, so that the left and right connecting blocks 101 slide against each other. As the fourth spring 34 is compressed, both left and right racks 11 move away from each other. Under the meshing action of the gear ring 18 and the rack 11, the gear ring 18 rotates, causing the fixed ring 12 to rotate. Under the action of the insert 20 and the fixed ring 19, the fixed ring 12 causes the rotating ring 13 to rotate. The top posts 14 rotate and move closer to the side wall of the substrate, so that the wedge blocks 23 are pressed against the side wall of the substrate under the squeezing action of the top posts 14, thus completing the secondary positioning of the substrate. When the wedge blocks 23 are pressed against the side wall of the substrate, and the fixed ring 12 continues to rotate, the wedge blocks 23 are squeezed by the side wall of the substrate, so that the wedge blocks 23 slide closer to the center of the top post 14 through the sliding rod 24. The second spring 25 is compressed, and the inclined surface of the wedge blocks 23 squeezes the connecting plate 21, so that the connecting plate 21 moves towards the center of the top post 14. Slide upwards, the insertion post 20 slides upwards and disengages from the insertion hole 191, the first spring 22 is stretched, and the rotation of the fixing ring 12 no longer drives the rotation ring 13 to rotate. This prevents the top post 14 from rotating excessively and causing the wedge block 23 to squeeze and damage the substrate. The contact angle and pressure between the wedge block 23 and the side wall of the substrate are automatically adjusted to ensure that substrates of different shapes can be firmly clamped, avoiding displacement or uneven soldering caused by irregular substrate shapes. It can be used for positioning irregularly shaped substrates. Then, solder paste is poured onto the stencil 7, and the solder paste is brushed into the mesh of the stencil 7 using a brush. The solder paste falls along the mesh into the designated position on the substrate, thus performing soldering treatment on the substrate. After soldering is completed, pull the lever 8 upwards to reverse the connecting rod 6 by 90 degrees, so that the stencil 7 rotates forward by 90 degrees to reset. During this process, the fixing rod 9 rotates 90 degrees backward, away from the inclined part of the pressure rod 10. The fourth spring 34 returns to its original state, causing the left and right connecting blocks 101 to slide closer to each other. The left and right racks 11 move closer to each other, and the racks 11 drive the gear ring 18 to reverse, causing the fixing ring 12 to reverse. The insertion post 20 slides along the top of the fixing ring 19. When the insertion post 20 is aligned with the insertion hole 191, the first spring 22 returns to its original state, causing the insertion post 20 to be inserted into the insertion hole 191. The fixing ring 12 drives the rotating ring 13 to reverse, causing the top posts 14 to rotate away from the side wall of the substrate, and the wedge blocks 23 to move away from the side wall of the substrate. The second spring 25 returns to its original state, causing the wedge blocks 23 to slide away from the center of the top posts 14. The second spring 25 can ensure that the wedge blocks 23 are correctly reset, and the connecting block 101 slides downward.Next, slide the positioning plate 26 backward along the guide groove 301 to remove the solder-applied substrate from the positioning plate 26, thus completing one solder-applied step. Repeat the above steps to achieve continuous solder-applied substrate processing.

[0032] like Figure 1 , Figure 9 and Figure 10 As shown, the positioning assembly includes a first guide rod 27, a clamping block 28, a third spring 29, a handle 30, a pressing strip 31, a first inclined surface 311, and a second inclined surface 312. Two sliding grooves 261 are opened on the left and right sides of the top of the positioning plate 26. The first guide rod 27 is fixedly connected to each of the sliding grooves 261. The clamping block 28 is slidably connected to each of the first guide rods 27. The front and rear clamping blocks 28 are interconnected. The third spring 29 is fixedly connected between the first guide rod 27 and the clamping block 28. The rear side of the positioning plate 26 is fixedly connected to... There is a handle 30. Extrusion strips 31 are fixedly connected to the left and right sides of the guide plate 3. The middle of the extrusion strip 31 is provided with a first inclined surface 311 and a second inclined surface 312. The clamping blocks 28 are slidably connected to the extrusion strip 31. The rear side of the first inclined surface 311 is close to the third spring 29. The rear side of the first inclined surface 311 is close to the left and right sides of the guide plate 3. The rear side of the second inclined surface 312 is close to the left and right sides of the guide plate 3. The front side of the second inclined surface 312 is close to the guide groove 301. The front side of the first inclined surface 311 is fixedly connected to the rear side of the second inclined surface 312.

[0033] like Figure 3 and Figure 7 As shown, it also includes a movable seat 15, a bidirectional lead screw 16, and a motor 17. The bottom of the fixed ring 12 is rotatably connected to the movable seat 15. The movable seat 15 is slidably connected to the worktable 2. The left and right movable seats 15 are threadedly connected to the bidirectional lead screw 16. The bidirectional lead screw 16 is fixedly connected to the worktable 2. Two motors 17 are installed in the worktable 2. One side of the bidirectional lead screw 16 is fixedly connected to the output shaft of the motor 17.

[0034] Initially, the third spring 29 is in its natural state, and the left and right clamping blocks 28 are close to each other. During the initial positioning of the substrate by the positioning assembly, the grip 30 pushes the positioning plate 26 closer to the steel mesh 7. The left and right clamping blocks 28 first move away from each other along the first guide rod 27 under the opening action of the first inclined surface 311, and the third spring 29 is stretched. When the left and right clamping blocks 28 are located at the connection between the first inclined surface 311 and the second inclined surface 312, the distance between the left and right clamping blocks 28 is the maximum opening distance. At this time, the substrate is placed on the positioning plate 26, and the grip 30 continues to push the positioning plate 26 forward. The first inclined surface 311 no longer opens the left and right clamping blocks 28, and the third spring 29 returns to its original state, causing the left and right clamping blocks 28 to slide along the first guide rod 27 and the second inclined surface 312. The left and right clamping blocks 28 move closer together, clamping and fixing the sidewalls of the substrate. This allows the positioning component to quickly and stably clamp and position the substrate without requiring manual movement of the left and right clamping blocks 28 or repeated adjustments to the substrate position, ensuring consistent substrate position during each soldering process. The motor 17 drives the bidirectional lead screw 16 to rotate, causing the left and right moving seats 15 to move closer together, thus shortening the distance between them. Conversely, the motor 17 drives the bidirectional lead screw 16 to reverse, causing the left and right moving seats 15 to move further apart, thus increasing the distance between them. Furthermore, the positioning component enables the positioning of substrates of different sizes, allowing for rapid switching between different sized substrates without changing the clamps, thus improving the utilization rate of this positioning device.

[0035] like Figure 1 , Figure 2 and Figure 11 As shown, it also includes screws 32. Two screws 32 are rotatably connected to the front side of the base 1, and both screws 32 are threadedly connected to the slide column 5. Rotating both screws 32 at the same time causes the slide column 5 to slide upward along the fixed base 4, thereby raising the height of the stencil 7. Reversing both screws 32 at the same time causes the slide column 5 to slide downward along the fixed base 4, thereby lowering the height of the stencil 7. This ensures that the stencil 7 is in close contact with the substrate, thereby flexibly controlling the distance between the stencil 7 and the guide plate 3. This ensures that the stencil 7 can fit tightly against the upper surface of the substrate, achieving uniform soldering. It is suitable for substrates of different thicknesses and will not cause the slide column 5 to shift due to downward pressure during soldering.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A positioning device for LED substrate mounting, comprising a base (1) and a worktable (2), wherein the worktable (2) is connected to the base (1), characterized in that, It also includes a guide plate (3), a positioning plate (26), a fixed seat (4), a sliding column (5), a connecting rod (6), a steel mesh (7), a pull rod (8), a rotating assembly, a fixed ring (12), a rotating ring (13), a top column (14), a fixed ring (19), an insert column (20), and a positioning assembly. The workbench (2) is connected to the middle of the guide plate (3). The guide plate (3) has a guide groove (301). The positioning plate (26) is slidably connected to the guide plate (3) through the guide groove (301). The positioning assembly is connected to the guide plate (3). The front side of the base (1) is connected to two fixed seats (4). The fixed seats (4) are slidably connected to the side of each other. The two sliding columns (5) are rotatably connected to a connecting rod (6) that can only rotate 90 degrees. A pull rod (8) is rotatably connected to a fixed base (4) on one side. The pull rod (8) is fixedly connected to a connecting rod (6). A steel mesh (7) is detachably connected to the connecting rod (6). Two fixed rings (12) are slidably and rotatably connected to the left and right sides of the middle of the worktable (2). A rotating ring (13) is rotatably connected to each fixed ring (12). A top column (14) is connected to each rotating ring (13). The bottom of the top column (14) is higher than the top of the positioning plate (26). A fixed ring (19) is connected inside each fixed ring (12). Insertion holes (191) are spaced apart along the circumference on the fixed ring (19). Insertion posts (20) that are compatible with the insertion holes (191) are slidably connected to the inner wall of the fixed ring (12). A rotating component is connected between the connecting rod (6) and the fixed ring (12).

2. The positioning device for LED substrate mounting according to claim 1, characterized in that, The rotating assembly includes a fixed rod (9), a pressure rod (10), a connecting block (101), a rack (11), a gear ring (18), a second guide rod (33), and a fourth spring (34). Two fixed rods (9) are connected to the bottom of the connecting rod (6). Connecting blocks (101) are slidably connected to both the left and right sides of the worktable (2). Pressure rods (10) are connected to the rear sides of each connecting block (101). The sides of the pressure rods (10) that are close to each other are in contact with the fixed rods (9). The rear sides of the left and right pressure rods (10) are... The two connecting blocks (101) are inclined and extend vertically upwards. The two connecting blocks (101) are slidably connected to the side away from each other. The second guide rod (33) is fixedly connected to the worktable (2). The second guide rod (33) is connected to the connecting block (101) with a fourth spring (34). The two connecting blocks (101) are connected to the side away from each other with two racks (11). The bottom of the fixing ring (12) is connected to a toothed ring (18). The racks (11) mesh with the toothed rings (18).

3. The positioning device for LED substrate mounting according to claim 2, characterized in that, The positioning device also includes a connecting plate (21), a first spring (22) and a wedge block (23). The insert (20) is connected to the connecting plate (21), the connecting plate (21) is slidably connected to the top post (14), the first spring (22) is connected between the connecting plate (21) and the fixing ring (12), the top post (14) is slidably connected to the wedge block (23), and the connecting plate (21) is located on the inclined surface of the wedge block (23).

4. The positioning device for LED substrate mounting according to claim 3, characterized in that, The positioning device also includes a sliding rod (24) and a second spring (25). The wedge block (23) and the top column (14) are slidably connected by the sliding rod (24), and the wedge block (23) and the sliding rod (24) are connected by the second spring (25).

5. The positioning device for LED substrate mounting according to claim 4, characterized in that, The positioning device also includes a movable seat (15), a two-way lead screw (16), and a motor (17). The bottom of the fixed ring (12) is rotatably connected to the movable seat (15). The movable seats (15) are slidably connected to the worktable (2). The left and right movable seats (15) are threadedly connected to the two-way lead screw (16). The two-way lead screw (16) is fixedly connected to the worktable (2). Two motors (17) are installed in the worktable (2). One side of the two-way lead screw (16) is fixedly connected to the output shaft of the motor (17).

6. The positioning device for LED substrate mounting according to claim 5, characterized in that, The positioning assembly includes a first guide rod (27), a clamping block (28), a third spring (29), and a handle (30). The top left and right sides of the positioning plate (26) each have two sliding grooves (261). The first guide rod (27) is connected to each of the sliding grooves (261). The clamping block (28) is slidably connected to the first guide rod (27). The front and rear clamping blocks (28) are connected to each other. The third spring (29) is connected between the first guide rod (27) and the clamping block (28). The handle (30) is connected to the rear side of the positioning plate (26).

7. The positioning device for LED substrate mounting according to claim 6, characterized in that, The positioning component also includes an extrusion strip (31), a first inclined surface (311) and a second inclined surface (312). Extrusion strips (31) are connected to both the left and right sides of the guide plate (3). The middle part of the extrusion strip (31) is provided with a first inclined surface (311) and a second inclined surface (312). The clamping blocks (28) are slidably connected to the extrusion strips (31).

8. The positioning device for LED substrate mounting according to claim 7, characterized in that, The positioning device also includes screws (32), and two screws (32) are rotatably connected to the front side of the base (1). Both screws (32) are threadedly connected to the slide column (5).

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