Attaching device

Abstract

The application relates to a fitting device, comprising a first fitting mechanism, a second fitting mechanism and an elastic tensioning mechanism, the first fitting mechanism comprises a profiling surface, one side of a flexible screen body attached with a bearing film is arranged on the profiling surface; the second fitting mechanism is used for picking up a curved surface element and can move relative to the profiling surface along a first direction; the elastic bearing mechanism comprises at least two elastic bearing components arranged on the circumferential side of the profiling surface along a second direction, and the elastic bearing components are configured to generate elastic reaction force on the curved surface element during fitting of the curved surface element and the flexible screen body, so as to provide elastic buffering, and the application can improve the fitting yield.

Description

Technical Field

[0001] This application relates to the field of curved display technology, and in particular to bonding devices. Background Technology

[0002] Current curved display screen bonding equipment uses multi-axis linkage components to clamp the carrier film, thereby shaping the flexible display screen body with OCA adhesive onto the contoured surface of the silicone fixture, and then pressing the curved glass cover plate down to bond it to the flexible display screen body.

[0003] However, during the bonding process, the impact force of the curved glass cover plate pressing down directly acts on the flexible screen, which can easily lead to uneven stress on the bonding interface and defects such as wrinkles, misalignment, and film marks on the flexible screen. Summary of the Invention

[0004] Based on this, this application provides a bonding device that can improve the bonding yield.

[0005] A bonding device for bonding curved elements to a flexible screen includes a first bonding mechanism, a second bonding mechanism, and an elastic bearing mechanism. The first bonding mechanism includes a contoured surface, and one side of the flexible screen with a bearing film attached is positioned on the contoured surface. The second bonding mechanism is used to pick up the curved element and can drive the curved element to move along a first direction toward the contoured surface. The elastic bearing mechanism includes at least two elastic bearing components disposed opposite each other along a second direction around the contoured surface. The first direction and the second direction are perpendicular. The elastic bearing components are configured to generate an elastic reaction force on the curved element during the bonding process between the curved element and the flexible screen to provide elastic cushioning.

[0006] In some embodiments, the first fitting mechanism includes a fixed base and a contouring member disposed on the top of the fixed base, the contouring member having the contouring surface; the elastic bearing assembly includes a first connector, a second connector, a bearing member, and an elastic reset member, the first connector being disposed on the fixed base; the second connector being movably connected to the first connector along the first direction; the bearing member being disposed on the second connector and used to bear the edge of the curved element; the elastic reset member having its opposite ends connected to the first connector and the second connector respectively.

[0007] In some embodiments, the carrier has a bearing surface and a limiting step located on the outer periphery of the bearing surface; the bearing surface is used to support the bottom of the curved element, and the limiting step is used to abut against the side of the curved element.

[0008] In some embodiments, the elastic bearing assembly further includes a fine-tuning mounting plate, which is movably mounted on the second connector along the first direction; the two opposite ends of the elastic reset member are respectively connected to the first connector and the fine-tuning mounting plate.

[0009] In some embodiments, the first connector is provided with a guide rail, the second connector is provided with a slider, the guide rail extends along the first direction, and the slider is slidably mounted on the guide rail.

[0010] In some embodiments, the number of elastic bearing components is multiple, and they are spaced apart circumferentially along the contouring member.

[0011] In some embodiments, the first bonding mechanism includes a fixing base and a contouring member disposed on the fixing base, the contouring member having the contouring surface; the elastic tensioning mechanism includes two elastic tensioning components disposed opposite to each other on opposite sides of the contouring surface along a second direction, the elastic tensioning components including a first mounting plate, a second mounting plate, and an elastic tensioning member, the first mounting plate having at least two connecting protrusions spaced apart along the second direction, the connecting protrusions being used to pass through and fix the carrier film; the second mounting plate is fixed to the fixing base and spaced apart from the first mounting plate in the first direction; the elastic tensioning member is connected to the first mounting plate and the second mounting plate at opposite ends respectively, and the first mounting plate has a tendency to move closer to the second mounting plate in the first direction, so as to elastically tension the carrier film.

[0012] In some embodiments, the mounting base is provided with a mounting cavity that is open in a third direction, the mounting cavity having a first inner wall close to the profile in the first direction, the third direction being perpendicular to both the first and second directions;

[0013] The elastic tensioning assembly is installed inside the mounting cavity, and at least a portion of the connecting protrusion extends outward from the opening of the mounting cavity;

[0014] The elastic tensioning assembly further includes a tension adjustment structure, which is movably disposed on the first mounting plate along the first direction and abuts against the first inner wall;

[0015] The tension adjustment structure is configured to limit the maximum travel of the first mounting plate toward the first inner wall by adjusting the distance of its protrusion relative to the upper surface of the first mounting plate, thereby adjusting the tension force applied to the carrier membrane by the elastic tensioning assembly.

[0016] In some embodiments, the tension adjustment structure is an adjustment bolt, and a threaded hole is correspondingly provided on the first mounting plate, with the tension adjustment structure threadedly connected to the threaded hole.

[0017] In some embodiments, the first mounting plate has a first mounting protrusion; the elastic tensioning assembly further includes a fine-tuning connecting plate, which is movably disposed on the second mounting plate along the first direction, and the fine-tuning connecting plate is provided with a second mounting protrusion; the two ends of the elastic tensioning member are respectively connected to the first mounting protrusion and the second mounting protrusion, and the tension of the elastic tensioning member is adjusted by adjusting the distance of the fine-tuning connecting plate on the first mounting plate.

[0018] In some embodiments, the elastic tensioning assembly further includes a guide post and a guide sleeve; the guide post is connected to the first mounting plate, the guide sleeve is connected to the second mounting plate, and the guide post is slidably disposed within the guide sleeve along the first direction.

[0019] Based on the bonding device of this application, by setting up an elastic tensioning mechanism and an elastic bearing mechanism, the bonding yield of flexible screens and curved components can be improved. Specifically, the elastic tensioning component is used to clamp and elastically tension the edge of the bearing film to pull the bearing film taut and conformally bond it to the conforming surface. The bearing film in the tensioned state is tightly attached to the conforming surface, which can apply a preload to the conforming surface, effectively limiting excessive deformation of the conforming surface during the compression process, and avoiding the risk of bending or tearing of the flexible screen due to local collapse of the conforming surface.

[0020] Meanwhile, during the pressing and bonding process of the curved components, the elastic bearing components can generate an upward elastic reaction force on the curved components. This elastic reaction force absorbs the impact load when the curved components are pressed down, providing flexible buffering and preventing damage to the flexible screen from hard collisions. On the other hand, this elastic reaction force makes the curved components more stable during the pressing and bonding process, which is conducive to improving the uniform distribution of stress at the bonding interface and avoiding wrinkles or displacement of the flexible screen due to uneven unidirectional force. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the assembly of the flexible screen and the carrier film in some embodiments.

[0022] Figure 2 This is a schematic diagram of the structure of the curved surface element in some embodiments.

[0023] Figure 3 This is a schematic diagram of the bonding device in some embodiments.

[0024] Figure 4This is a schematic diagram of the bonding device from another perspective in some embodiments.

[0025] Figure 5 This is a schematic diagram of the structure of the first bonding mechanism in some embodiments.

[0026] Figure 6 This is a schematic diagram of the structure of the second bonding mechanism in some embodiments.

[0027] Figure 7 This is a schematic diagram of the bonding component in some embodiments.

[0028] Figure 8 This is an assembly diagram of the contouring component, elastic tensioning mechanism, and elastic bearing mechanism in some embodiments.

[0029] Figure 9 This is a schematic diagram of the assembly of the contouring component, elastic tensioning mechanism and elastic bearing mechanism from another perspective in some embodiments.

[0030] Figure 10 This is a schematic diagram showing the structure of the carrier film, flexible screen and glass cover plate in some embodiments, which are respectively engaged with the conforming component, the elastic tensioning mechanism and the elastic bearing mechanism.

[0031] Figure 11 This is a schematic diagram showing the structure of the carrier film, flexible screen and glass cover plate in some embodiments, respectively cooperating with the bonding component, the conforming component, the elastic tensioning mechanism and the elastic bearing mechanism.

[0032] Figure 12 This is a schematic diagram of the elastic tensioning mechanism in some embodiments.

[0033] Figure 13 This is a schematic diagram of the elastic bearing mechanism in some embodiments.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Bonding device; 10. Frame; 20. First bonding mechanism; 21. Drive assembly; 211. Drive element; 212. Lifting element; 22. First housing; 221. First cavity; 23. Contouring assembly; 231. Mounting base plate; 232. Leveling base plate; 233. Leveling upper plate; 234. Support plate; 235. Fixing seat; 235a. Mounting cavity; 236. Pressure plate; 237. Contouring part; 2371. 24. Contouring surface; 30. Alignment platform assembly; 31. Second bonding mechanism; 32. Gantry frame; 33. Lifting assembly; 34. Second housing; 35. Second cavity; 36. Drive unit; 37. Bonding assembly; 38. Mounting base plate; 39. Leveling assembly; 30. Bonding component; 31. Bonding surface; 42. Pressure detection device; 43. Elastic tensioning mechanism; 44. First mounting plate; 45. Connecting protrusion; 46. 12. First mounting protrusion; 42. Second mounting plate; 43. Elastic tensioning element; 44. Tension adjustment structure; 45. Fine-tuning connecting plate; 451. Second mounting protrusion; 452. First oblong hole; 46. Guide bushing; 47. Guide post; 50. Elastic bearing mechanism; 51. First connecting piece; 511. First connecting part; 52. Second connecting piece; 53. Bearing element; 54. Elastic reset element; 541. Bearing surface; 542. Limiting step; 55. Fine-tuning mounting plate; 551. Second connecting part; 552. Second oblong hole; 561. Guide rail; 562. Slider; 60. Vacuum generating mechanism; 70. Feeding mechanism; 71. Feeding platform; 72. Feeding robot; 80. Cleaning mechanism; 2. Bearing film; 2a. Connecting hole; 3. Flexible screen; 4. Curved surface element; XX, First direction; YY, Second direction; ZZ, Third direction. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical connection; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] With the development of flexible display technology, curved displays are being used more and more widely. The production of these curved displays generally involves bonding a flexible screen body to a curved glass cover.

[0043] In related technologies, a vacuum bonding structure with upper and lower cavities is commonly used: the flexible screen is placed on a carrier film, and then the carrier film is placed on the contouring surface of the lower vacuum cavity. Under the drive of the multi-axis linkage contouring clamp assembly, the flexible screen is tensioned, so that it is pre-contacted to the contouring surface that matches the curved glass cover. At the same time, the curved glass cover is placed on the positioning fixture of the upper vacuum cavity, and then the position and pose information of the two are collected by a vision camera to complete the alignment. Finally, the upper and lower cavities are closed and a vacuum is drawn, and then the curved glass cover is driven down to complete the bonding with the flexible screen.

[0044] However, during the bonding process, the impact force of the curved glass cover pressing down directly acts on the flexible screen, which can easily lead to uneven stress on the bonding interface and defects such as wrinkles, misalignment, and film marks on the flexible screen. In addition, the multi-axis linkage contour clamp assembly has a complex structure and large size, occupying a large amount of space inside the lower vacuum chamber, resulting in a large vacuum chamber volume after the cover is closed and a long vacuuming time. Secondly, the multi-axis linkage assembly has a large number of motion axes, high assembly precision requirements, and difficulty in adjusting motion parameters, resulting in high overall procurement and maintenance costs.

[0045] Please see Figure 1 and Figure 2 , Figure 1 This illustration shows an assembly diagram of the flexible screen 3 being attached to the carrier film 2 in an embodiment of this application. Figure 2 This is a schematic diagram of the curved surface element 4 in an embodiment of this application. (See attached diagram.) Figure 3 , Figure 3 The diagram shows a schematic of the bonding device 1 in one embodiment of this application. The bonding device 1 provided in one embodiment of this application is used for bonding a curved element 4 to a flexible screen 3. The curved element 4 may be a 3D curved glass cover.

[0046] For ease of description, Figure 3Taking the coordinate system in the figure as an example, the first direction XX, the second direction YY and the third direction ZZ are defined as being perpendicular to each other. When the bonding device 1 is performing bonding operations, the first direction XX can correspond to the vertical direction, and the second direction YY and the third direction ZZ can correspond to the horizontal direction.

[0047] Please refer to the following: Figure 3 and Figure 4 The bonding device 1 includes a frame 10 and a first bonding mechanism 20, a second bonding mechanism 30, an elastic tensioning mechanism 40, an elastic bearing mechanism 50, a vacuum generating mechanism 60, a feeding mechanism 70, and a cleaning mechanism 80, all mounted on the frame 10. The frame 10 can be a frame structure formed by welding metal rods to provide a stable supporting foundation.

[0048] Please see Figure 3 and Figure 5 The first bonding mechanism 20 constitutes the lower module, including a drive assembly 21, a first housing 22, and a contouring assembly 23. The drive assembly 21 is mounted on the frame 10 and drives the first housing 22 to move along a first direction XX and / or a second direction YY. The first housing 22 has a first cavity 221 with an open top, and the contouring assembly 23 is housed within the first cavity 221. Please refer to the reference section. Figure 8 The contouring component 23 is provided with a contouring surface 2371, which has a shape adapted to the curved element 4. The side of the flexible screen 3 with the carrier film 2 attached is placed on the contouring surface 2371, which is used to support and pre-conform the flexible screen 3.

[0049] Please see Figure 6 and Figure 7 The second bonding mechanism 30 constitutes the upper module, including a gantry 31, a lifting assembly 32, a second housing 33, a drive unit 34, and a bonding assembly 35. The gantry 31 is mounted on the frame 10 and positioned above the first bonding mechanism 20. The lifting assembly 32 is mounted on the gantry 31 and drives the second housing 33 to move along a first direction XX. The second housing 33 has a second cavity 331 with an open lower section, and the bonding assembly 35 is housed within the second cavity 331. The drive unit 34 is mounted on the gantry 31 and is capable of driving the bonding assembly 35 to reciprocate along the first direction XX, wherein the bonding assembly 35 is used to pick up and fix the curved surface element 4.

[0050] Please see Figure 5 The elastic tensioning mechanism 40 is installed inside the first cavity 221. Please refer to the relevant documentation. Figure 8 and Figure 9The elastic tensioning mechanism 40 includes two elastic tensioning components disposed opposite each other along the second direction YY on both sides of the contoured surface 2371. The elastic tensioning components are used to clamp and elastically tension the edges of the carrier film 2, thereby pulling the carrier film 2 taut and tightly adhering it to the contoured surface 2371. The tensioned carrier film 2 can apply a preload to the contoured surface 2371, thereby limiting excessive deformation of the contoured surface 2371 during the pressure process. It should be noted that the contoured surface 2371 is formed by a contouring fixture made of flexible materials such as silicone, which can undergo elastic deformation under pressure to adapt to the curvature of the curved element 4. However, without constraint, excessive collapse is likely to occur; while the tensioned carrier film 2 can effectively suppress its excessive deformation, balance the bonding pressure, and avoid defects such as tearing and wrinkling of the flexible screen 3 due to localized stress concentration.

[0051] Please see Figure 8 and Figure 9 The elastic bearing mechanism 50 is also installed in the first cavity 221, including at least two elastic bearing components disposed opposite each other along the second direction YY on the periphery of the contoured surface 2371. The elastic bearing components are configured to apply an upward elastic reaction force to the curved element 4 during the bonding process between the curved element 4 and the flexible screen 3, thereby providing elastic cushioning while balancing the impact force on the flexible screen 3 during the bonding process.

[0052] Please see Figure 10 and Figure 11The bonding process of the bonding device 1 in this embodiment is as follows: The flexible screen 3, with the carrier film 2 and optical adhesive attached, is placed on the contour surface 2371 of the first bonding mechanism 20, wherein the side of the flexible screen 3 with the carrier film 2 attached faces the contour surface 2371, and the side of the flexible screen 3 with the optical adhesive attached faces upward, i.e., the second bonding mechanism 30; wherein the optical adhesive can be OCA adhesive. The elastic tensioning mechanism 40 clamps and tightens the edge of the carrier film 2, so that the flexible screen 3 is bonded to the contour surface 2371. At the same time, the bonding component 35 of the second bonding mechanism 30 picks up the curved element 4. Then, the lifting component 32 drives the second housing 33 to descend until the open edge of the first housing 22 and the second housing 33 abuts, forming a closed vacuum chamber. At this time, the curved element 4 and the flexible screen 3 have not yet come into contact. The vacuuming procedure is started to remove the air in the vacuum chamber. After vacuuming is completed, the drive unit 34 drives the bonding assembly 35 downwards along the first direction XX, causing the curved element 4 to move towards the flexible screen 3. During this process, the edge of the curved element 4 is supported by the elastic support mechanism 50. The elastic support assembly generates an elastic reaction force under force, absorbing the downward impact and providing cushioning. As the bonding assembly 35 continues to descend, the middle part of the curved element 4 first contacts the flexible screen 3. The flexible screen 3 on the contoured surface 2371 begins to bond from the highest point of the curved element 4, gradually expelling air bubbles from the center point to the surrounding edges. Under the bonding pressure, the elastic support assembly further contracts until the edge of the curved element 4 is completely bonded to the flexible screen 3, achieving the assembly and fixation of the two.

[0053] Based on the bonding device 1 of this embodiment, by providing the elastic tensioning mechanism 40 and the elastic bearing mechanism 50, the stability of the bonding process can be improved, thereby increasing the bonding yield. Specifically, the elastic tensioning component is used to clamp and elastically tension the edge of the bearing film 2 to pull the bearing film 2 taut and conformally bond it to the conforming surface 2371. The bearing film 2 in the tensioned state is tightly attached to the conforming surface 2371, which can apply a pre-tension force to the conforming surface 2371, effectively limiting the excessive deformation of the conforming surface 2371 during the pressure process, and avoiding the risk of bending or tearing of the flexible screen 3 due to local collapse of the conforming surface 2371. At the same time, during the pressing and bonding process of the curved element 4, the elastic bearing component can generate an upward elastic reaction force on the curved element 4. The elastic reaction force absorbs the impact load when the curved element 4 is pressed down, providing a flexible buffer to prevent hard collisions from damaging the flexible screen 3. On the other hand, the elastic reaction force makes the curved element 4 more stable during the pressing and bonding process, which is conducive to improving the uniform distribution of stress at the bonding interface and avoiding wrinkles or displacement of the flexible screen 3 due to uneven unidirectional force, thereby improving the bonding yield.

[0054] Please see Figure 8 and Figure 9In some embodiments, the contouring component 23 includes a mounting base 235 and a contouring element 237 disposed on the mounting base 235, the contouring element 237 having a contouring surface 2371. The contouring element 237 is made of silicone to provide sufficient flexibility during the bonding process and avoid damage to the flexible screen 3.

[0055] Please see Figure 12 In some embodiments, the elastic tensioning assembly includes a first mounting plate 41, a second mounting plate 42, and an elastic tensioning member 43. The first mounting plate 41 has at least two connecting protrusions 411 spaced apart along its extension direction (i.e., the second direction YY), and corresponding connecting holes 2a are provided on the carrier film 2. The second mounting plate 42 is fixed to the fixing base 235 and is spaced apart from the first mounting plate 41 in the first direction XX. The elastic tensioning member 43 is a tension spring, with its opposite ends connected to the first mounting plate 41 and the second mounting plate 42, respectively. Under normal conditions, the elastic tensioning member 43 has a tendency to drive the first mounting plate 41 to move closer to the second mounting plate 42 in the first direction XX, that is, it has a tendency to drive the first mounting plate 41 to move away from the second bonding mechanism 30 along the first direction XX.

[0056] Based on the above structure, this embodiment implements a passive elastic tensioning mechanism: during installation, the connecting hole 2a at the edge of the carrier film 2 is hooked onto the connecting protrusion 411, thus achieving rapid clamping of the carrier film 2; after the carrier film 2 is hooked onto the connecting protrusion 411 through the connecting hole 2a, the carrier film 2 applies a pulling force to the first mounting plate 41 along the first direction XX away from the second mounting plate 42. At this time, the elastic tensioning member 43 generates an elastic restoring force due to being stretched. This elastic restoring force drives the first mounting plate 41 to tend to return to its original position closer to the second mounting plate 42, but due to the constraint of the carrier film 2, the first mounting plate 41 cannot return to its original position, thereby making the carrier film 2 elastically tensioned. The elastic tensioning component of this embodiment has the advantages of simple structure, rapid response, and adaptive compensation for the slight deformation of the carrier film 2 during the bonding process.

[0057] To further optimize the installation convenience of the elastic tensioning components and improve space utilization, please refer to [link / reference needed]. Figure 8 and Figure 9 In some embodiments, the mounting base 235 has a mounting cavity 235a open in the third direction ZZ, and the mounting cavity 235a has a first inner wall close to the profile member 237 in the first direction XX; the elastic tensioning assembly is integrally embedded in the mounting cavity 235a. The connecting protrusion 411 on the first mounting plate 41 extends at least partially from the opening of the mounting cavity 235a to the outside, leaving sufficient operating space for the connecting hole 2a of the carrier membrane 2 to engage.

[0058] Based on the above embodiments, the elastic tensioning component is embedded in the mounting cavity 235a of the fixing base 235, without any additional protruding redundant structure, which improves the internal space utilization of the first cavity 221. This not only frees up fitting space for larger irregular curved surface covers, but also reduces the volume of the vacuum chamber after the first housing 22 and the second housing 33 are closed, which helps to shorten the vacuuming time. At the same time, the protruding position of the connecting protrusion 411 matches the edge contour of the contouring part 237. When the carrier film 2 is hooked to the connecting protrusion 411 through the connecting hole 2a and the elastic tensioning member 43 applies tension, the carrier film 2 can fit tightly against the edge area of ​​the contouring part 237, avoiding problems such as edge suspension and wrinkles, which is beneficial to improving the surface accuracy of the large curvature contouring surface 2371.

[0059] To adjust the tension of the carrier film 2 to accommodate the bonding requirements of flexible screen bodies 3 with different thicknesses and materials, please refer to [link / reference needed]. Figure 12 In some embodiments, the elastic tensioning assembly further includes a tension adjustment structure 44, which is movably coupled to the first mounting plate 41 along a first direction XX, with its top end rigidly abutting against the first inner wall. In this embodiment, the tension adjustment structure 44 essentially constitutes a rigid stop for the upward travel of the first mounting plate 41. Its working principle is as follows: by adjusting the distance by which the tension adjustment structure 44 protrudes relative to the upper surface of the first mounting plate 41, the highest position that the first mounting plate 41 can reach under tension (when pulled by the bearing membrane 2 and the elastic tensioning member 43) can be set, that is, the maximum travel of the first mounting plate 41 towards the first inner wall is limited. When the distance by which the tension adjustment structure 44 protrudes from the upper surface of the first mounting plate 41 increases, the top limit of the first mounting plate 41 is raised, which can increase the tension force on the bearing membrane 2; conversely, when the distance by which the tension adjustment structure 44 protrudes decreases, the tension force on the bearing membrane 2 can be reduced. In this example, stable and reliable tension control can be achieved through simple mechanical adjustment, which not only improves the bonding quality of the contoured surface 2371 edge, but also effectively avoids the risk of tearing of the flexible screen 3 due to excessive tension.

[0060] In some embodiments, the tension adjustment structure 44 is an adjusting bolt with external threads on its outer periphery, and a corresponding threaded hole is provided on the first mounting plate 41. The adjusting bolt is threaded into the threaded hole. By rotating the adjusting bolt, the micro-feed characteristic of the threaded engagement can be used to drive the adjusting bolt to reciprocate along the first direction XX, thereby infinitely adjusting the distance of its protrusion from the upper surface of the first mounting plate 41. This solution does not require an additional drive source and can achieve continuous fine adjustment of the tension force simply by manually turning it. The adjustment accuracy is high, which can not only adapt to the different tension force requirements of flexible screens 3 with different thicknesses and materials, but also further reduces the energy consumption and complexity of the equipment.

[0061] In other embodiments, the tension adjustment structure 44 can also be an active adjustment structure, such as a linear motor or a miniature lead screw module. In this type of solution, the mover of the linear motor or the nut of the lead screw can be used as the adjustment end, directly connected to the first mounting plate 41. By outputting an adjustment signal through the control system, the first mounting plate 41 can be automatically driven to move along the first direction XX, achieving precise digital control of the tension force.

[0062] To improve the flexibility of elastic tension adjustment and adaptability to operating conditions, please refer to [link / reference]. Figure 12 In some embodiments, the first mounting plate 41 is provided with a first mounting protrusion 412, and the elastic tensioning assembly further includes a fine-tuning connecting plate 45, which is movably disposed on the second mounting plate 42 along the first direction XX, and is provided with a second mounting protrusion 451; the elastic tensioning member 43 is a tension spring, with both ends bent to form hooks. Both the first mounting protrusion 412 and the second mounting protrusion 451 adopt a smooth cylindrical structure. The tension spring is hung on the first mounting protrusion 412 and the second mounting protrusion 451 respectively through the hooks at both ends, without the need for fasteners, making disassembly and assembly convenient.

[0063] Optionally, multiple sets of the first mounting protrusion 412 and the second mounting protrusion 451 are configured, and multiple elastic tensioning members 43 are correspondingly provided. For example, two elastic tensioning members 43 are provided at intervals along the second direction YY to provide a balanced tension force in the first direction XX, so as to avoid uneven force on the bearing membrane 2 and cause skewing.

[0064] Please see Figure 12 The fine-tuning connecting plate 45 has a first oblong hole 452 extending along the first direction XX. A locking screw passing through the first oblong hole 452 is used to fix it to the second mounting plate 42. During adjustment, the locking screw is loosened, and the fine-tuning connecting plate 45 is moved along the first direction XX to change the distance between the first mounting protrusion 412 and the second mounting protrusion 451, thereby adjusting the pre-tension of the tension spring. After adjustment to the target position, the locking screw can fix the fine-tuning connecting plate 45. This fine-tuning structure, in conjunction with the aforementioned tension adjusting bolt, forms a two-stage adjustment system, which can adapt to elastic tensioning elements 43 with different elastic coefficients and meet the differentiated tension requirements of flexible screen bodies 3 with different materials and thicknesses.

[0065] Please return to the reference. Figure 1 In some embodiments, the edge of the carrier film 2 is provided with a plurality of connecting holes 2a spaced apart along its own extension direction, and the connecting protrusion 411 of the first mounting plate 41 can be selectively engaged with any one of the connecting holes 2a. When adapting to flexible screens of different widths, or when the width of the carrier film 2 itself has processing tolerances, the connecting protrusion 411 can be selectively engaged with connecting holes 2a at different positions, thereby changing the effective tension length of the carrier film 2.

[0066] It is understandable that the optional adjustment of the connecting hole 2a in this embodiment and the spacing adjustment of the aforementioned fine-tuning connecting plate 45 are tension adjustment methods of different dimensions: the former adapts to different specifications of membrane materials by changing the effective tension length of the bearing membrane 2, and the latter adapts to different tension force requirements by changing the pre-stretch amount of the elastic tensioning member 43. The two, together with the stroke adjustment of the aforementioned tension adjusting bolt, further enhance the equipment's compatibility with products of different specifications.

[0067] To further improve the straightness and stability of the movement of the first mounting plate 41 relative to the second mounting plate 42, and to avoid uneven stress on the bearing membrane 2 due to movement skew, please refer to [reference needed]. Figure 12 The elastic tensioning assembly also includes a guide structure comprising a guide post 47 and a guide sleeve 46, both extending along a first direction XX. In one specific implementation, the guide sleeve 46 is fixed to the first mounting plate 41, and the guide post 47 is fixed to the second mounting plate 42. The guide post 47 is slidably inserted into the guide sleeve 46, providing a rigid constraint on the movement trajectory of the first mounting plate 41, ensuring that the first mounting plate 41 can only move linearly along the first direction XX. In another specific implementation, the guide sleeve 46 is fixed to the second mounting plate 42, and the guide post 47 is fixed to the first mounting plate 41, achieving the same guiding function. To balance the unidirectional tension applied by the elastic tensioning member 43, the guide structure is preferably configured in two sets, symmetrically arranged on both sides of the elastic tensioning member 43, to prevent the first mounting plate 41 from tilting due to eccentric loading.

[0068] Please see Figure 13 In some embodiments, the elastic bearing assembly includes a first connector 51, a second connector 52, a bearing 53, and an elastic reset member 54. The first connector 51 is fixed to the periphery of the fixing base 235, and the first connector 51 is provided with a guide rail 561 extending along the first direction XX; the second connector 52 is provided with a slider 562, which is slidably connected to the guide rail 561 to improve the accuracy of the second connector 52 moving linearly along the first direction XX; the bearing 53 is fixed to the top of the second connector 52, and the bearing 53 has a horizontally arranged bearing surface 541 and a limiting step 542 located on the outer periphery of the bearing surface 541; the elastic reset member 54 is a tension spring, whose opposite ends are respectively connected to the first connector 51 and the second connector 52, and under normal conditions has the tendency to drive the second connector 52 to move along the first direction XX toward the second bonding mechanism 30.

[0069] During the bonding process between the curved element 4 and the flexible screen 3, the bottom edge of the curved element 4 first abuts against the bearing surface 541, while the outer edge adheres to the inner side of the limiting step 542. The limiting step 542 achieves horizontal limiting of the curved element 4, preventing skewing during the downward pressing process. As the bonding assembly 35 continues to drive the curved element 4 downward, the second connector 52 overcomes the elastic force of the elastic reset member 54 and slides towards the first connector 51 along the first direction XX. The elastic reset member 54 is compressed and generates an upward elastic reaction force: on the one hand, this reaction force can absorb the impact load during the downward pressing process, providing flexible buffering and preventing hard collision damage to the curved element 4 or the flexible screen 3; on the other hand, this reaction force forms a dynamic mechanical balance with the vertical downward tensioning component of the aforementioned elastic tensioning assembly on the bearing film 2, preventing defects such as wrinkles, tears, or film marks from appearing on the flexible screen 3 due to uneven unidirectional force, thus ensuring a uniform stress distribution at the bonding interface.

[0070] To further improve the uniformity of force distribution, please refer to 8. In some embodiments, multiple elastic bearing components are provided and spaced apart circumferentially along the contour member 237. For example, four elastic bearing components are provided, respectively arranged at the four corners of the contour member 237. The four elastic bearing components jointly support the edge of the curved element 4, and with the guiding effect of the sliding structure, improve the posture stability of the curved element 4 during the pressing process. The elastic bearing components are integrated into the periphery of the fixed base 235, further reducing the internal volume of the first cavity 221. This, combined with the embedded design of the elastic tensioning component, forms a space-optimized synergy, helping to shorten the vacuuming time and improve the production cycle.

[0071] Please see Figure 13 In some embodiments, the elastic bearing assembly further includes a fine-tuning mounting plate 55, which is movably mounted along a first direction XX to one of the first connector 51 and the second connector 52. The fine-tuning mounting plate 55 is provided with a second connecting portion 551; the other of the first connector 51 and the second connector 52 is provided with a first connecting portion 511. For example, the fine-tuning mounting plate 55 is movably disposed on the second connector 52, and the first connector 51 is provided with the first connecting portion 511. The two ends of the elastic reset member 54 are respectively hooked and connected to the first connecting portion 511 and the second connecting portion 551. The fine-tuning mounting plate 55 is provided with a second oblong hole 552 extending in the first direction XX. It is fixed to the second connector 52 by a locking screw passing through the second oblong hole 552. During adjustment, the locking screw is loosened and the fine-tuning mounting plate 55 is moved along the first direction XX to change the distance between the first connector 511 and the second connector 551, thereby adjusting the pre-tension of the elastic reset member 54. After adjustment to the target position, the locking screw can fix the fine-tuning mounting plate 55.

[0072] By adjusting the position of the fine-tuning mounting plate 55 in the first direction XX, the distance between the first connecting part 511 and the second connecting part 551 can be changed, thereby adjusting the pre-tension (i.e., pre-tightening force) of the elastic reset member 54. The overall structure of this elastic bearing assembly is simple and compact, and it is located close to the periphery of the fixed base 235, which helps to reduce the volume of the first cavity 221.

[0073] In addition to the above-mentioned scheme of using a tension spring as the elastic reset member 54, the elastic reset member 54 can also be replaced by a compression spring. In this alternative scheme, the two ends of the compression spring abut against the first connecting member 51 and the second connecting member 52 respectively, and under normal conditions, it has the tendency to drive the second connecting member 52 to move along the first direction XX toward the direction of the second contacting mechanism 30.

[0074] Please return to the reference. Figure 3 In some embodiments, the drive assembly 21 of the first bonding mechanism 20 includes a drive element 211 and a lifting element 212. The drive element 211 is mounted on the frame 10 and is used to drive the lifting element 212 to move along the second direction YY (horizontal direction). The lifting element 212 is connected to the first housing 22 and is used to drive the first housing 22 to move up and down along the first direction XX (vertical direction). The drive element 211 and the lifting element 212 can adopt conventional linear drive structures such as cylinders, lead screw modules or servo motors.

[0075] To improve the flatness and bonding yield of the contoured surface 2371, please refer to [link / reference needed]. Figure 8 and Figure 9 In some embodiments, the contouring assembly 23 further includes a mounting base plate 231, a leveling base plate 232, a leveling upper plate 233, and a support plate 234. The mounting base plate 231 is mounted on the bottom wall of the first cavity 221, and the leveling base plate 232, the leveling upper plate 233, and the support plate 234 are stacked sequentially in the first direction XX. By adjusting the relative position between the leveling base plate 232 and the leveling upper plate 233 (for example, by using a fine-tuning screw on the leveling base plate 232 to abut against the leveling upper plate 233), precise correction of the levelness of the contouring part 237 can be achieved. In addition, the contouring assembly 23 also includes a pressure plate 236, which is fixed to the fixing seat 235 by fasteners and presses the edge of the contouring part 237 to prevent the contouring part 237 from shifting or curling during the pressing process.

[0076] Please see Figure 5 In some embodiments, the first bonding mechanism 20 further includes an alignment platform component 24 (such as a UVW alignment platform), which is connected to the bottom of the first housing 22 and is used to drive the first housing 22 to make fine translation or rotation adjustments in the horizontal plane to cooperate with the second bonding mechanism 30 to complete high-precision alignment.

[0077] Please see Figure 7 In some embodiments, the bonding component 35 of the second bonding mechanism 30 further includes a mounting base 351, a leveling component 352, and a bonding member 353. The mounting base 351 is fixedly mounted on the top wall of the second cavity 331. The leveling component 352 is mounted on the mounting base 351 and is used to fine-tune the horizontal posture of the bonding member 353. The leveling component 352 can be set in the form of the leveling bottom plate 232 and the leveling top plate 233 in the first bonding mechanism 20. The bonding member 353 is mounted on the side of the leveling component 352 facing the first bonding mechanism 20. The bonding member 353 has a bonding surface 3531 that is adapted to the shape of the curved element 4, and a vacuum adsorption channel is opened inside the bonding member 353. The bonding surface 3531 is distributed with adsorption holes communicating with the vacuum adsorption channel for fixing the curved element 4 by vacuum adsorption.

[0078] To further precisely control the bonding pressure and avoid damaging the flexible screen 3 due to excessive pressure or causing incomplete bonding due to insufficient pressure, please refer to [link / reference needed]. Figure 6 In some embodiments, the second bonding mechanism 30 further includes a pressure detection device 36. The pressure detection device 36 is a pressure sensor disposed between the power output end of the drive unit 34 and the mounting base plate 351 of the bonding assembly 35. It is configured to collect the reverse force applied by the drive unit 34 to the bonding assembly 35 in real time during the bonding process and feed the signal back to the control system to achieve constant force bonding control.

[0079] Please see Figure 3 In some embodiments, the bonding device 1 further includes a vacuum generating mechanism 60, which includes at least a vacuum pump. The vacuum pump is connected to the first cavity 221 and the second cavity 331 via a suction pipe. When the first housing 22 and the second housing 33 approach and abut against each other along the first direction XX to form a closed vacuum chamber, the vacuum pump is activated to extract air from the vacuum chamber to create a high vacuum environment, thereby effectively eliminating residual bubbles at the bonding interface and significantly reducing the bubble defect rate. Optionally, a vacuum sensor and an electromagnetic control valve are also provided on the suction pipe, which can monitor the vacuum level in real time and accurately control the suction rate and holding time according to process requirements, further improving the stability of the vacuum environment. In addition, the vacuum pump is also connected to the vacuum adsorption channel inside the bonding component 353 via an adsorption pipe. The bonding surface 3531 of the bonding component 353 is distributed with adsorption holes that communicate with the vacuum adsorption channel. When the bonding assembly 35 picks up the curved element 4, the vacuum pump applies a uniform adsorption force to the back of the curved element 4 through the adsorption holes to achieve stable fixation of the curved element 4.

[0080] For automated production, please refer to Figure 4In some embodiments, the bonding device 1 further includes a loading mechanism 70. The loading mechanism 70 includes a loading platform 71 and a loading robot 72. The loading platform 71 is used to temporarily store the curved surface element 4 to be bonded, and the loading robot 72 is used to pick up the curved surface element 4 from the loading platform 71 and transfer it to the bonding assembly 35 of the second bonding mechanism 30. The end effector of the loading robot 72 preferably adopts a porous suction or flexible gripper structure to adapt to the irregular contour of the curved surface element 4 and avoid damage during picking or transferring.

[0081] In some embodiments, the bonding device 1 further includes a cleaning mechanism 80, preferably a plasma cleaning mechanism 80, which is located beside the loading platform 71. The loading robot 72 is configured to move the curved element 4 above or in front of the cleaning mechanism 80 along the path of the curved element 4, and then perform online cleaning and surface activation treatment on the bonding surface 3531 (i.e., the side facing the flexible screen 3) of the curved element 4 using a plasma beam sprayed by the cleaning mechanism 80. This treatment effectively removes organic contaminants and microparticles from the surface of the curved element 4 and increases its surface energy, thereby significantly improving the bonding strength between the subsequent OCA adhesive and the curved element 4, and reducing the risk of delamination, bubbles, and other defects after bonding.

[0082] In summary, the working process of the bonding device 1 in this embodiment is as follows:

[0083] Loading process: The loading robot 72 picks up the curved surface component 4 (such as a 3D curved glass cover) to be bonded from the loading platform 71 on the side. During the transfer, it passes through the plasma cleaning mechanism 80, where the bonding surface 3531 of the curved surface component 4 is cleaned and activated by plasma spraying to remove organic contaminants and increase surface energy. Then, the loading robot 72 transfers the processed curved surface component 4 to the bonding component 353 of the second bonding mechanism 30. The vacuum adsorption channel inside the bonding component 353 is activated, and the curved surface component 4 is firmly adsorbed through the adsorption holes of the bonding surface 3531. The leveling component 352 of the bonding component 353 can simultaneously fine-tune the horizontal posture of the curved surface component 4 to improve the initial position accuracy, thus completing the loading and pre-treatment. Upstream automated equipment or operators place the flexible screen with the carrier film 2 and OCA adhesive attached onto the contouring surface 2371 of the first bonding mechanism 20. The connecting holes 2a at the edge of the carrier film 2 are hooked onto the connecting protrusions 411 of the first mounting plate 41 of the elastic tensioning component. Subsequently, the elastic tensioning component operates, and the elastic tensioning member 43 pulls the carrier film 2 tight, so that it fits tightly against the contouring surface 2371 of the contouring member 237, thus completing the pre-contouring of the flexible screen.

[0084] At this stage, the pre-tension of the elastic tensioning member 43 can be adjusted by moving the connecting plate 45 along the first direction XX to change the distance between the two mounting protrusions; the tension of the bearing membrane 2 can also be adjusted by rotating the tension adjustment structure 44.

[0085] During the bonding process: the lifting component 32 of the second bonding mechanism 30 drives the second housing 33 to descend along the first direction XX (vertical direction) until the open edge of the second housing 33 abuts against the open edge of the first housing 22, forming a closed vacuum chamber; then the vacuum generating mechanism 60 is activated, and air is extracted from the vacuum chamber through an independent pipeline. After reaching the preset vacuum level, pressure is maintained to complete the vacuuming process of closing the lid. The driving unit 34 of the second bonding mechanism 30 drives the bonding assembly 35 to move downward along the first direction XX. First, the edge of the curved element 4 abuts against the bearing surface 541 of the elastic bearing assembly, and the outer edge is bonded to the inner side of the limiting step 542. The limiting step 542 achieves horizontal limiting to avoid downward pressure and deviation. As the bonding assembly 35 continues to move downward, the curved element 4 pushes the second connector 52 to slide towards the first connector 51 along the first direction XX. The elastic reset member 54 is compressed / stretched to generate an upward elastic reaction force: on the one hand, it absorbs the downward pressure impact to provide flexible buffer and avoid damage to the device from hard collisions; on the other hand, it forms a dynamic mechanical balance with the vertical downward tensioning component of the elastic tensioning assembly on the bearing film 2, so as to avoid wrinkles, tears or film marks on the flexible screen due to uneven force in one direction.

[0086] Simultaneously, the pressure detection device 36 collects the bonding pressure in real time and feeds it back to the control system to achieve constant force control. This allows the flexible screen on the contoured surface 2371 to begin bonding from the highest point in the middle of the curved element 4, gradually expelling air bubbles from the center outwards until the edge of the curved element 4 is completely bonded to the flexible screen, completing high-precision bonding. This stage eliminates the need for visual alignment; bonding accuracy of ±0.05mm can be achieved by relying on elastic tension pre-contouring and elastic bearing guide limits, saving the complex steps of visual acquisition and algorithm alignment required in traditional solutions.

[0087] After bonding is completed, the drive unit 34 drives the bonding component 35 to reset, and the lifting component 32 drives the second housing 33 to move upward, releasing the vacuum adsorption of the bonding component 353 on the curved element 4; then the first housing 22 can move horizontally, making it convenient for downstream equipment to take out the bonded finished product; the elastic tension component releases the carrier film 2, and the elastic carrier component automatically resets under the restoring force of the elastic reset component 54, and the device returns to the initial state, waiting for the next round of operation.

[0088] Based on the bonding device 1 of this application embodiment, the elastic tensioning mechanism 40 elastically tensions the carrier film 2, so that the tensioned carrier film 2 can limit the excessive deformation of the silicone material contour part 237 during the pressure process, and avoid the bending and tearing of the flexible screen caused by the partial collapse of the contour part 237; the elastic bearing mechanism 50 provides an upward elastic reaction force when the curved element 4 is pressed down, and avoids the flexible screen 3 from defects such as wrinkles, displacement, and film marks due to uneven unidirectional force, which is beneficial to improving the bonding yield. The elastic tensioning component is embedded in the mounting cavity 235a of the fixed base 235, and the elastic bearing component is arranged circumferentially in the corner area of ​​the fixed base 235. The overall structure is compact and eliminates the need for a bulky multi-axis linkage contour clamp component and an upper and lower cavity visual alignment component. This frees up fitting space for larger irregular curved surface covers and reduces the volume of the vacuum chamber, which helps to shorten the vacuuming time and increase the equipment's productivity. At the same time, it saves the high-precision machining, assembly, and debugging costs of the multi-axis linkage component, reducing the overall machine procurement and maintenance costs.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A bonding device for bonding curved elements to a flexible screen, characterized in that, include: The first bonding mechanism includes a contoured surface, wherein one side of the flexible screen body to which the carrier film is attached is used to be placed on the contoured surface; The second bonding mechanism is used to pick up the curved surface element and can drive the curved surface element to move along the first direction toward the contoured surface; as well as The elastic bearing mechanism includes at least two elastic bearing components disposed opposite each other on the periphery of the contoured surface along a second direction, wherein the first direction and the second direction are perpendicular, and the elastic bearing components are configured to generate an elastic reaction force on the curved surface element during the process of the curved surface element being attached to the flexible screen body, so as to provide elastic cushioning.

2. The bonding device according to claim 1, characterized in that, The first bonding mechanism includes a fixing base and a contouring member disposed on the top of the fixing base, the contouring member being provided with the contouring surface; the elastic bearing component includes: A first connector is disposed on the fixed base; The second connector is movably connected to the first connector along the first direction; A support member, disposed on the second connector, is used to support the edge of the curved element; and An elastic reset component is connected to the first connector and the second connector at its opposite ends.

3. The bonding device according to claim 2, characterized in that, The support member has a bearing surface and a limiting step located on the outer periphery of the bearing surface.

4. The bonding device according to claim 2, characterized in that, The elastic bearing assembly further includes a fine-tuning mounting plate, which is movably mounted on the second connector along the first direction; The two opposite ends of the elastic reset member are respectively connected to the first connector and the fine-tuning mounting plate.

5. The bonding device according to claim 2, characterized in that, The first connector is provided with a guide rail, and the second connector is provided with a slider. The guide rail extends along the first direction, and the slider is slidably mounted on the guide rail. And / or; the number of the elastic bearing components is multiple, and they are spaced apart circumferentially along the contoured part.

6. The bonding device according to claim 1, characterized in that, The first bonding mechanism includes a fixed base and a contouring component disposed on the fixed base, the contouring component being provided with the contouring surface; the bonding device further includes: The elastic tensioning mechanism includes two elastic tensioning components disposed opposite each other on opposite sides of the contoured surface along the second direction. Each elastic tensioning component includes: A first mounting plate is provided with at least two connecting protrusions spaced apart along the second direction, the connecting protrusions being used to pass through and fix the carrier membrane; A second mounting plate is fixed to the fixing base and is spaced apart from the first mounting plate in the first direction; and An elastic tensioning member is connected to the first mounting plate and the second mounting plate at opposite ends, respectively, so that the first mounting plate tends to move closer to the second mounting plate in the first direction, so as to elastically tension the carrier film.

7. The bonding device according to claim 6, characterized in that, The mounting base is provided with a mounting cavity that is open in the third direction. The mounting cavity has a first inner wall that is close to the profile in the first direction, and the third direction is perpendicular to the first direction and the second direction. The elastic tensioning assembly is installed inside the mounting cavity, and at least a portion of the connecting protrusion extends outward from the opening of the mounting cavity; The elastic tensioning assembly further includes a tension adjustment structure, which is movably disposed on the first mounting plate along the first direction and abuts against the first inner wall; The tension adjustment structure is configured to limit the maximum travel of the first mounting plate toward the first inner wall by adjusting the distance of its protrusion relative to the upper surface of the first mounting plate.

8. The bonding device according to claim 7, characterized in that, The tension adjustment structure is an adjustment bolt, and a threaded hole is correspondingly provided on the first mounting plate. The tension adjustment structure is threadedly connected to the threaded hole.

9. The bonding device according to claim 7, characterized in that, The first mounting plate has a first mounting protrusion; The elastic tensioning assembly further includes a fine-tuning connecting plate, which is movably disposed on the second mounting plate along the first direction, and the fine-tuning connecting plate is provided with a second mounting protrusion. The two ends of the elastic tensioning member are respectively connected to the first mounting protrusion and the second mounting protrusion.

10. The bonding device according to claim 7, characterized in that, The elastic tensioning assembly also includes a guide post and a guide bushing; The guide post is connected to the first mounting plate, the guide bushing is connected to the second mounting plate, and the guide post is slidably disposed within the guide bushing along the first direction.

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