Backlight assembly positioning device

Abstract

The application provides a backlight source assembly assembling positioning device, relates to the technical field of backlight source assemblies, and comprises an assembling table, a positioning base is fixedly arranged at the center of the assembling table, lateral positioning and clamping mechanisms are arranged around the positioning base, the lateral positioning and clamping mechanisms comprise drive air cylinders, push plates and composite clamping plates, the drive air cylinders are fixedly arranged on the assembling table, the push plates are arranged at the output ends of the drive air cylinders, one side of each push plate is connected with a composite clamping plate through a connecting assembly, a plurality of first sliding holes are arranged on the side, away from the push plate, of each composite clamping plate, a contact rod is slidably arranged in each first sliding hole, one end of the contact rod extends to the outside of each first sliding hole, the other end of the contact rod is connected with a contact plate through a connecting spring, and a contact pressure sensor is arranged on the side, away from the contact rod, of the contact plate. In the application, the clamping pressure is monitored in real time through the contact pressure sensor, the clamping force is accurately controllable, and the problems that the frame body is deformed due to excessively large clamping force or the frame body is loose and displaced due to excessively small clamping force are avoided.

Description

Technical Field

[0001] This invention relates to the field of backlight assembly technology, and in particular to a backlight assembly positioning device. Background Technology

[0002] The backlight assembly is a core functional component of LCD displays, and its assembly precision directly affects the imaging effect and lifespan of the display. The assembly process of the backlight assembly uses the frame as the core assembly benchmark. The backlight frame must first be accurately positioned and reliably clamped, and then the LED strips, light guide plates, reflectors, and optical films are assembled in sequence. The positioning accuracy and clamping stability of the frame are crucial to ensuring the overall assembly quality of the backlight.

[0003] Currently, the industry mostly uses traditional rigid clamping fixtures for backlight frame assembly and positioning. For example, Chinese Patent CN102620253B discloses a backlight component assembly and positioning device and method, relating to the display technology field, invented to improve the assembly quality of backlight components. The backlight component assembly and positioning device includes a base with a guide rail. At least one sliding bracket is slidably mounted on the guide rail. Each sliding bracket has a groove for accommodating the backlight component. The guide rail also has a first limiting block and a second limiting block. The first limiting block is located on the outer side of one side of all at least one sliding bracket, and the second limiting block is located on the outer side of the other side of all at least one sliding bracket. Both the first and second limiting blocks have adjusting screws, and the advancing and retreating direction of the adjusting screws is consistent with the length direction of the guide rail. This invention is used for assembling backlight components.

[0004] The basic components in the aforementioned backlight assembly are rigidly clamped and fixed by the first limiting block and the second limiting block. However, during the clamping and fixing process, the clamping force cannot be precisely controlled. Overload of clamping force can easily cause the frame to deform, while insufficient clamping force can easily cause the frame to loosen and shift, which in turn leads to misalignment of subsequent LED light strips, light guide plates, optical films and other components, reducing the yield of the backlight finished product. Summary of the Invention

[0005] This invention provides a backlight component assembly and positioning device to solve the technical problems of current backlight component assembly and positioning devices, which cannot accurately control the clamping force during the clamping and fixing of the basic components of the backlight component. Overloading the clamping force can easily lead to deformation of the frame, while insufficient clamping force can easily cause the frame to loosen and shift, directly causing misalignment in subsequent component assembly and reducing the yield of the backlight product.

[0006] To solve the above-mentioned technical problems, the present invention discloses a backlight assembly positioning device, comprising: an assembly table, a positioning base fixedly disposed at the center of the assembly table, the positioning base being used to support the backlight frame, and a lateral positioning clamping mechanism arranged around the positioning base, the lateral positioning clamping mechanism being used to form a multi-directional circumferential clamping of the backlight frame, the lateral positioning clamping mechanism including a drive cylinder, a push plate and a composite clamping plate, the drive cylinder being fixedly disposed on the assembly table, the output end of the drive cylinder being disposed towards the backlight frame, the push plate being disposed at the output end of the drive cylinder, the side of the push plate away from the drive cylinder being connected to the composite clamping plate through a connecting component, the side of the composite clamping plate away from the push plate being provided with a plurality of first sliding holes, a contact rod being slidably disposed in the first sliding holes, one end of the contact rod extending to the outside of the first sliding hole, the other end of the contact rod being connected to the contact plate through a connecting spring, the contact plate being horizontally slidably connected to the inner wall of the first sliding hole, a contact pressure sensor being disposed on the side of the contact plate away from the contact rod, the contact pressure sensor being fixedly connected to the inner wall of the first sliding hole.

[0007] Preferably, the connecting assembly includes a plurality of second sliding holes disposed in the push plate. The second sliding holes are horizontally disposed. A connecting post is slidably disposed in the second sliding hole. One end of the connecting post is fixedly connected to the push plate. A reset spring is sleeved on the outside of the connecting post. One end of the reset spring is connected to the push plate, and the other end of the reset spring is connected to the composite clamping plate.

[0008] Preferably, the end of the connecting post away from the composite clamping plate extends to the outside of the second sliding hole and is provided with a baffle, the width of which is greater than the diameter of the second sliding hole.

[0009] Preferably, a plurality of first sliding holes are arranged at equal intervals along the length direction of the composite clamping plate.

[0010] Preferably, symmetrical grooves are provided on the upper and lower sides of the first sliding hole, and a slider is slidably arranged in the groove, with one end of the slider being fixedly connected to the contact plate.

[0011] Preferably, a first mounting hole is provided at the end of the contact rod away from the connecting spring, and a first ball is movably disposed in the first mounting hole.

[0012] Preferably, the composite clamping plate has an elongated mounting hole on the side away from the push plate, the elongated mounting hole is set along the length of the composite clamping plate, an airbag adapted to the elongated mounting hole is set in the elongated mounting hole, an air pump is set on the assembly table, an air inlet valve is set at the air pump input end, a first air pipe is set at the air pump output end, one end of the first air pipe passes through the composite clamping plate and communicates with the inside of the airbag, a second air pipe is set on the composite clamping plate, one end of the second air pipe communicates with the inside of the airbag, and an air outlet valve is set on the second air pipe.

[0013] Preferably, a plurality of second mounting holes are provided on the upper surface of the positioning base, and the plurality of second mounting holes are distributed in a rectangular array on the surface of the positioning base, and second ball bearings are movably disposed in the second mounting holes.

[0014] Preferably, an air chamber is provided inside the positioning base, and the air chamber is connected to the second mounting hole through an air inlet. The end of the second air pipe away from the airbag is connected to the inside of the air chamber. An air outlet is provided at the bottom of the second mounting hole. The lower end of the air outlet passes through the positioning base and the bottom wall of the assembly table in sequence and is connected to the bottom of the assembly table. Support legs are provided at the four corners of the bottom of the assembly table.

[0015] Preferably, the air inlets are arranged in a ring array about the center of the second mounting hole.

[0016] The technical solution of the present invention has the following advantages: In the present invention, the clamping pressure is monitored in real time by a contact pressure sensor, so as to achieve precise and controllable clamping force, avoiding the problem of frame deformation due to excessive clamping force and frame loosening and displacement due to insufficient clamping force, and providing a stable and reliable benchmark guarantee for the precise alignment and assembly of backlight components such as LED light strips, light guide plates and optical films.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the means particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a top view of a backlight assembly positioning device according to the present invention; Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 For the present invention Figure 1 Partial structural cross-sectional view at point BB; Figure 4 For the present invention Figure 3 Enlarged view of the structure at point C; Figure 5 For the present invention Figure 3 Enlarged view of the structure at point D; Figure 6 For the present invention Figure 3 Enlarged view of the structure at the EE section; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point F.

[0020] In the diagram: 1. Assembly table; 2. Positioning base; 3. Backlight frame; 4. Drive cylinder; 5. Push plate; 6. Composite clamping plate; 7. First sliding hole; 8. Contact rod; 9. Connecting spring; 10. Contact plate; 11. Contact pressure sensor; 12. Connecting column; 13. Reset spring; 14. Baffle; 15. Slide groove; 16. Slider; 17. First mounting hole; 18. First ball bearing; 19. Long strip mounting hole; 20. Airbag; 21. Air pump; 22. Inlet valve; 23. First air pipe; 24. Second air pipe; 25. Outlet valve; 26. Second mounting hole; 27. Second ball bearing; 28. Air chamber; 29. ​​Inlet; 30. Outlet. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Example 1: This embodiment of the invention provides a backlight component assembly and positioning device, such as... Figures 1-7As shown, the assembly includes: an assembly table 1, a positioning base 2 fixedly mounted at the center of the assembly table 1, the positioning base 2 supporting the backlight frame 3, and lateral positioning clamping mechanisms arranged around the positioning base 2 to form a multi-directional encircling clamping of the backlight frame 3. The lateral positioning clamping mechanisms include a drive cylinder 4, a push plate 5, and a composite clamping plate 6. The drive cylinder 4 is fixedly mounted on the assembly table 1, with its output end facing the backlight frame 3. The push plate 5 is mounted on the output end of the drive cylinder 4, and is located away from the drive cylinder 4. One side of the cylinder 4 is connected to the composite clamping plate 6 via a connecting assembly. The composite clamping plate 6 is provided with several first sliding holes 7 on the side away from the push plate 5. A contact rod 8 is slidably arranged in the first sliding hole 7. One end of the contact rod 8 extends to the outside of the first sliding hole 7, and the other end of the contact rod 8 is connected to the contact plate 10 via a connecting spring 9. The contact plate 10 is horizontally slidably connected to the inner wall of the first sliding hole 7. A contact pressure sensor 11 is provided on the side of the contact plate 10 away from the contact rod 8. The contact pressure sensor 11 is fixedly connected to the inner wall of the first sliding hole 7.

[0024] The working principle and beneficial effects of the above technical solution are as follows: The backlight frame 3 is positioned with the positioning base 2 as the core assembly reference. During assembly, the backlight frame 3 is first placed on the positioning base 2. Then, the lateral positioning clamping mechanism surrounding the frame drives the push plate 5 and the composite clamping plate 6 to feed synchronously towards the backlight frame 3 through the drive cylinder 4. The contact rod 8 on the composite clamping plate 6 first comes into contact with the flat outer wall of the frame. As the clamping feed continues, the contact rod 8 slides inward along the first sliding hole 7 and causes the connecting spring 9 to be elastically compressed. The connecting spring 9 drives the contact plate 10 to slide towards the contact pressure sensor 11 in the first sliding hole 7. The contact plate 10 contacts the contact pressure sensor 11, and the clamping force is smoothly transmitted to the contact pressure sensor 11 through the contact plate 10, realizing real-time and accurate monitoring of the clamping pressure. When the contact pressure sensor 11 monitors the clamping pressure in real time, the clamping force is adjusted accordingly. When the holding pressure reaches the preset clamping pressure range, the drive cylinder 4 stops working, thus completing the clamping and positioning of the backlight frame 3. This makes the frame the assembly reference for the entire backlight assembly. Components inside the backlight, such as the lamp strip, light guide plate, and optical film, are all assembled using the backlight frame 3 as the reference. The clamping pressure of the contact rod 8 on the backlight frame 3 is maintained within the preset clamping pressure range. This not only enables circumferential positioning based on the outer wall of the backlight frame 3, ensuring the positioning accuracy and clamping stability of the backlight frame 3, but also effectively avoids scratches and deformation of the outer wall of the frame caused by rigid contact. Furthermore, the clamping pressure is monitored in real time by the contact pressure sensor 11, ensuring precise and controllable clamping force. This avoids frame deformation due to excessive clamping force and loosening and displacement due to insufficient clamping force, thus paving the way for subsequent LED... The precise alignment and assembly of backlight components such as light strips, light guide plates, and optical films provides a stable and reliable benchmark. The overall device has a simple structure and reliable transmission, making it suitable for batch automated assembly of backlight components and improving overall assembly accuracy and production yield.

[0025] Example 2: Based on Example 1 above, the connecting component includes a plurality of second sliding holes disposed in the push plate 5. The second sliding holes are horizontally disposed. A connecting post 12 is slidably disposed in the second sliding hole. One end of the connecting post 12 is fixedly connected to the push plate 5. A return spring 13 is sleeved on the outside of the connecting post 12. One end of the return spring 13 is connected to the push plate 5, and the other end of the return spring 13 is connected to the composite clamping plate 6. The end of the connecting post 12 away from the composite clamping plate 6 extends to the outside of the second sliding hole and is provided with a baffle 14, the width of which is greater than the diameter of the second sliding hole.

[0026] The working principle and beneficial effects of the above technical solution are as follows: A connecting assembly is formed by the second sliding hole horizontally set inside the push plate 5, the connecting post 12 slidably disposed in the hole, the return spring 13 sleeved on the outside of the connecting post 12, and the baffle 14. During the process of the push plate 5 being fed and clamped by the drive cylinder 4, the connecting post 12 slides horizontally along the second sliding hole. The return spring 13 undergoes adaptive elastic deformation with the clamping and feeding stroke, forming a double elastic buffer with the contact rod 8 and the connecting spring 9. This further eliminates the rigid impact during the clamping and feeding process, preventing the backlight frame 3 from deforming or shifting due to instantaneous impact loads. It can also adaptively match the small dimensional deviations of the backlight frame 3, improving the fitting accuracy and consistency of the clamping and positioning. At the same time, the baffle 14 forms an axial limiting constraint on the connecting post 12, preventing the connecting post 12 from slipping out of the second sliding hole and failing. This ensures the structural stability and transmission reliability of the elastic connecting assembly, optimizes the overall stability of the clamping and feeding and the clamping safety, and provides a more stable reference support for the subsequent precise assembly of the backlight assembly.

[0027] Example 3: Based on Example 1 or 2, a plurality of first sliding holes 7 are equally spaced along the length of the composite clamping plate 6; The first sliding hole 7 is symmetrically provided with sliding grooves 15 on the upper and lower sides, and a slider 16 is slidably arranged in the sliding grooves 15. One end of the slider 16 is fixedly connected to the contact plate 10. A first mounting hole 17 is provided at the end of the contact rod 8 away from the connecting spring 9, and a first ball bearing 18 is movably disposed in the first mounting hole 17.

[0028] The working principle and beneficial effects of the above technical solution are as follows: The first sliding holes 7 are arranged at equal intervals along the length of the composite clamping plate 6, so that the contact rods 8 form a uniformly distributed multi-point support structure. The contact plate 10 achieves horizontal guidance constraint through the directional sliding cooperation of the sliding groove 15 and the slider 16. The first ball 18 at the end of the contact rod 8 forms rolling contact with the flat outer wall of the backlight frame 3. During the clamping positioning and subsequent reference fine-tuning sliding process, the equally spaced contact rods 8 can ensure that the supporting force on the backlight frame 3 is evenly distributed. The sliding cooperation of the sliding groove 15 and the slider 16 can prevent the contact rods 8 from being misaligned or offset. The first ball 18 can convert sliding friction into rolling friction, which greatly reduces the frictional resistance when clamping the backlight frame 3. At the same time, it avoids rigid sliding scratching the outer wall of the backlight frame 3. This not only improves the stability and accuracy of clamping positioning, but also ensures the safety of clamping the backlight frame 3, further optimizes the reference positioning effect of the backlight frame 3, and provides more reliable support for the subsequent precise assembly of the backlight components.

[0029] Example 4: Based on any one of Examples 1-3, a long mounting hole 19 is provided on the side of the composite clamping plate 6 away from the push plate 5. The long mounting hole 19 is provided along the length direction of the composite clamping plate 6. An airbag 20 adapted to the long mounting hole 19 is provided in the long mounting hole 19. An air pump 21 is provided on the assembly table 1. An air inlet valve 22 is provided at the input end of the air pump 21. A first air pipe 23 is provided at the output end of the air pump 21. One end of the first air pipe 23 passes through the composite clamping plate 6 and communicates with the inside of the airbag 20. A second air pipe 24 is provided on the composite clamping plate 6. One end of the second air pipe 24 communicates with the inside of the airbag 20. An air outlet valve 25 is provided on the second air pipe 24.

[0030] The working principle and beneficial effects of the above technical solution are as follows: A long strip mounting hole 19 is opened on the side of the composite clamping plate 6 facing the backlight frame 3, and a suitable flexible airbag 20 is built in. The assembly table 1 is equipped with an air pump 21, an air inlet valve 22, a first air pipe 23, a second air pipe 24, and an air outlet valve 25. After the backlight frame 3 completes multi-point rigid initial positioning through the contact rod 8, the air pump 21 and the air inlet valve 22 are turned on, and air is uniformly inflated into the airbag 20 through the first air pipe 23. The airbag 20 expands along the long strip mounting hole 19 and fits tightly against the outer wall of the backlight frame 3, forming a uniform surface pressure flexible clamping. A gas pressure sensor is installed in the airbag 20 to monitor the real-time air pressure in the airbag 20. When the airbag 20 is inflated to the preset air pressure, the air pump 21 and the air inlet valve 22 close synchronously, and the air outlet valve 25 remains closed. In the closed state, the airbag 20 is in a sealed and pressure-holding state, with no gas leakage throughout the process, and can maintain a constant clamping pressure for a long time. After all the backlight components are assembled, the air valve 25 automatically opens, the airbag 20 quickly depressurizes and releases the clamping state. The above structure ensures stable air pressure and no pressure decay throughout the clamping process through the sealed and pressure-holding design. It relies on the rigid support of the contact rod 8 to lock the reference position of the backlight frame 3, and the flexible surface of the airbag 20 contacts and disperses the clamping stress, preventing deformation, scratches and positioning deviation of the backlight frame 3. No continuous air supply is required during the pressure holding stage, which is energy-saving, stable and free from gas interference. Automatic air release after assembly greatly improves the efficiency of automated operation. The elongated mounting hole 19 forms a limit constraint on the airbag 20 to ensure the expansion fit and integrity, providing a stable and reliable reference guarantee for the high-precision assembly of the backlight components.

[0031] Example 5: Based on Example 4, a plurality of second mounting holes 26 are provided on the upper surface of the positioning base 2. The plurality of second mounting holes 26 are distributed in a rectangular array on the surface of the positioning base 2, and second ball bearings 27 are movably disposed in the second mounting holes 26.

[0032] The working principle and beneficial effects of the above technical solution are as follows: Second mounting holes 26 are arranged in a rectangular array on the upper surface of the positioning base 2, and second ball bearings 27 are movably installed within the second mounting holes 26. The second ball bearings 27 support the bottom surface of the backlight frame 3 in a protruding support state. During the initial rigid positioning of the backlight frame 3 by the contact rod 8, the second ball bearings 27 convert the sliding friction between the bottom surface of the backlight frame 3 and the positioning base 2 into low-resistance rolling friction, significantly reducing the moving resistance of the backlight frame 3 during adjustment. This avoids deformation of the frame or offset of the clamping position due to frictional resistance. The rectangular array arrangement ensures uniform and stable support of the bottom surface of the frame. Simultaneously, the movable rolling support of the second ball bearings 27 further reduces the risk of scratches and wear caused by hard contact between the bottom surface of the backlight frame 3 and the positioning base 2, protecting the structural and appearance integrity of the backlight frame 3 and further improving the adjustment accuracy and clamping reliability of the frame's reference positioning.

[0033] Example 6: Based on Example 5, an air chamber 28 is provided in the positioning base 2. The air chamber 28 is connected to the second mounting hole 26 through the air inlet 29. The end of the second air pipe 24 away from the airbag 20 is connected to the inside of the air chamber 28. An air outlet 30 is provided at the bottom of the second mounting hole 26. The lower end of the air outlet 30 passes through the bottom wall of the positioning base 2 and the assembly table 1 in sequence and is connected to the bottom of the assembly table 1. Support legs are provided at the four corners of the bottom of the assembly table 1. Several air inlets 29 are arranged in a ring array about the center of the second mounting hole 26.

[0034] The working principle and beneficial effects of the above technical solution are as follows: An air cavity 28 is integrated inside the positioning base 2, and an air outlet 30 is opened at the bottom of the second mounting hole 26. Air inlets 29 are arranged in a ring array around the center of the second mounting hole 26. When the air pump 21 is turned on, the air inlet valve 22 and the air outlet valve 25 are opened simultaneously. The air pump 21 supplies air to the airbag 20 and the air cavity 28 in a synchronous manner. The airflow is evenly output into the second mounting hole 26 through the ring array air inlets 29, forming an air-floating support film between the second ball 27 and the bottom surface of the backlight frame 3. Together with the second ball 27, it forms a dual-effect low-resistance support of air floating and rolling, which greatly reduces the fine-tuning resistance of the backlight frame 3. At the same time, the continuous airflow dynamically blows away dust and impurities on the inner wall of the second mounting hole 26 and the outer periphery of the second ball 27. The impurities are discharged in an orderly manner from the air outlet 30 with the airflow, avoiding the accumulation of impurities that could cause the second ball bearing 27 to become stuck. When the airbag 20 is inflated to the preset air pressure, the air pump 21 and the air inlet valve 22 are closed, and the air outlet valve 25 is closed simultaneously. The airbag 20 and the air chamber 28 enter a sealed and pressure-holding state simultaneously, with no gas flow in the air path. The air float support and airflow purging automatically stop, the backlight frame 3 is completely fixed, and the airbag 20 maintains a flexible and tight state. After assembly is completed, the air outlet valve 25 automatically opens, the airbag 20 and the air chamber 28 depressurize simultaneously, the clamping and support states are released simultaneously, and the gas is discharged through the air outlet 30 and the second mounting hole 26, further removing impurities from the outer periphery of the second ball bearing 27, eliminating the risk of the second ball bearing 27 becoming stuck, and improving operational reliability and service life.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A backlight assembly positioning device, characterized in that, include: Assembly table (1), with a fixed positioning base (2) at the center of the assembly table (1). The positioning base (2) is used to support the backlight frame (3). A lateral positioning clamping mechanism is arranged around the positioning base (2). The lateral positioning clamping mechanism is used to form a multi-directional circumferential clamping of the backlight frame (3). The lateral positioning clamping mechanism includes a drive cylinder (4), a push plate (5), and a composite clamping plate (6). The drive cylinder (4) is fixedly set on the assembly table (1). The output end of the drive cylinder (4) is set towards the backlight frame (3). The push plate (5) is set at the output end of the drive cylinder (4). The push plate (5) is away from the drive cylinder (4). One side is connected to the composite clamping plate (6) via a connecting component. Several first sliding holes (7) are provided on the side of the composite clamping plate (6) away from the push plate (5). A contact rod (8) is slidably arranged in the first sliding hole (7). One end of the contact rod (8) extends to the outside of the first sliding hole (7). The other end of the contact rod (8) is connected to the contact plate (10) via a connecting spring (9). The contact plate (10) is horizontally slidably connected to the inner wall of the first sliding hole (7). A contact pressure sensor (11) is provided on the side of the contact plate (10) away from the contact rod (8). The contact pressure sensor (11) is fixedly connected to the inner wall of the first sliding hole (7).

2. The backlight assembly positioning device according to claim 1, characterized in that, The connecting assembly includes several second sliding holes set in the push plate (5). The second sliding holes are set horizontally, and a connecting post (12) is slidably set in the second sliding hole. One end of the connecting post (12) is fixedly connected to the push plate (5). A reset spring (13) is sleeved on the outside of the connecting post (12). One end of the reset spring (13) is connected to the push plate (5), and the other end of the reset spring (13) is connected to the composite clamping plate (6).

3. The backlight assembly positioning device according to claim 2, characterized in that, The end of the connecting column (12) away from the composite clamping plate (6) extends to the outside of the second sliding hole and is provided with a baffle (14), the width of which is greater than the diameter of the second sliding hole.

4. The backlight assembly positioning device according to claim 1, characterized in that, Several first sliding holes (7) are equally spaced along the length of the composite clamping plate (6).

5. A backlight assembly positioning device according to claim 1, characterized in that, The first sliding hole (7) has symmetrically arranged sliding grooves (15) on the upper and lower sides. A slider (16) is slidably arranged in the sliding groove (15). One end of the slider (16) is fixedly connected to the contact plate (10).

6. The backlight assembly positioning device according to claim 1, characterized in that, A first mounting hole (17) is provided at the end of the contact rod (8) away from the connecting spring (9), and a first ball (18) is movably disposed in the first mounting hole (17).

7. The backlight assembly positioning device according to claim 1, characterized in that, A long mounting hole (19) is provided on the side of the composite clamping plate (6) away from the push plate (5). The long mounting hole (19) is set along the length direction of the composite clamping plate (6). An airbag (20) adapted to the long mounting hole (19) is set inside the long mounting hole (19). An air pump (21) is set on the assembly table (1). An air inlet valve (22) is set at the input end of the air pump (21). A first air pipe (23) is set at the output end of the air pump (21). One end of the first air pipe (23) passes through the composite clamping plate (6) and communicates with the inside of the airbag (20). A second air pipe (24) is set on the composite clamping plate (6). One end of the second air pipe (24) communicates with the inside of the airbag (20). An air outlet valve (25) is set on the second air pipe (24).

8. A backlight assembly positioning device according to claim 7, characterized in that, The upper surface of the positioning base (2) is provided with a number of second mounting holes (26), and the number of second mounting holes (26) are distributed in a rectangular array on the surface of the positioning base (2). The second ball bearings (27) are movably arranged in the second mounting holes (26).

9. A backlight assembly positioning device according to claim 8, characterized in that, An air chamber (28) is provided inside the positioning base (2). The air chamber (28) is connected to the second mounting hole (26) through the air inlet (29). The end of the second air pipe (24) away from the airbag (20) is connected to the inside of the air chamber (28). An air outlet (30) is provided at the bottom of the second mounting hole (26). The lower end of the air outlet (30) passes through the bottom wall of the positioning base (2) and the assembly table (1) in sequence and is connected to the bottom of the assembly table (1). Support legs are provided at the four corners of the bottom of the assembly table (1).

10. A backlight assembly positioning device according to claim 9, characterized in that, Several air inlets (29) are arranged in a ring array about the center of the second mounting hole (26).

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