A back adhesive bonding device

Abstract

The application discloses a back adhesive laminating device, and relates to the technical field of back adhesive laminating devices, which comprises a laminating table, a substrate, an adsorption assembly, a laminating assembly and a plurality of release rollers. The laminating assembly comprises a laminating roller, which can move along the Z axis and the X axis. Each release roller is used to isolate the back adhesive adsorbed by the adsorption assembly from the panel on the laminating table. The laminating roller has at least one release roller in front of and behind the X axis direction. The adsorption assembly comprises two adsorption units, which can be synchronously approached to make the adsorbed back adhesive curve. In the application, the starting point of the contact between the back adhesive and the panel is the curved part of the back adhesive, rather than the end of the back adhesive. Therefore, when the laminating roller starts to laminate the back adhesive, the back adhesive will not be accumulated and wrinkled. Before the back adhesive is laminated to the panel, the release roller is used to isolate the back adhesive from the panel. The back adhesive is gradually laminated to the panel under the pushing of the laminating roller, so that the air between the back adhesive and the panel is fully exhausted.

Description

Technical Field

[0001] This invention relates to the field of adhesive bonding equipment technology, specifically to an adhesive bonding device. Background Technology

[0002] The adhesive bonding equipment mainly consists of modules such as material feeding and conveying, peeling and tearing film, bonding execution, and material collection and recycling. Among them, the suction cup and pressure roller of the bonding execution mechanism are key components to ensure bonding quality.

[0003] The suction cup precisely picks up the adhesive strip after the film has been peeled off, ensuring the adhesive side is facing down. It then conveys the strip to the product panel that has been vacuum-adhesive fixed, applying gentle pre-pressure to initially adhere the adhesive to the panel surface. At this point, the adhesive is only in slight contact with the panel and is not fully bonded, which is to avoid premature adhesion that could lead to misalignment later, and to prepare for the pressing roller. The pressing roller begins to roll from one end of the adhesive to the other in a line-contact manner. Its internal rigid steel core ensures uniform pressure, while the outer high-elasticity rubber layer provides flexible bonding, preventing scratches to the panel or the adhesive. The pressing roller compacts the adhesive, causing a slight deformation of the adhesive layer to fully wet the microscopic unevenness of the product panel surface, while simultaneously expelling air between the adhesive layer and the panel, thus achieving a firm bond between the two.

[0004] It is important to note the following: First, when the pressure roller first contacts the end of the adhesive backing, the adhesive is not fully bonded and the end is in a loose state without strong fixation. The thrust generated by the rolling of the pressure roller will squeeze the end of the adhesive backing, which may cause the adhesive backing to accumulate and wrinkle, resulting in potential quality problems in the glued product. Second, because the adhesive backing has already made slight contact with the panel before the pressure roller presses it together, it is difficult to completely remove the air between the adhesive backing and the panel during the process of the pressure roller rolling from one end of the adhesive backing to the other. This results in micro-air bubbles between the adhesive backing and the panel, affecting the flatness of the adhesive backing surface. Summary of the Invention

[0005] The purpose of this invention is to provide an adhesive bonding device to solve the problems of easy accumulation and wrinkling of the adhesive end under pressure from the pressure roller and the existence of micro-bubbles between the adhesive and the panel in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adhesive bonding device, comprising an adhesive application table moving along the X-axis, a substrate disposed on a cross slide, and an adsorption assembly disposed on the substrate moving along the Z-axis, further comprising a pressing assembly and a plurality of release rollers; the pressing assembly includes a pressure roller, which is capable of moving along the Z-axis and the X-axis, and the axial direction of each release roller is the Y-axis direction and they are arranged at X-axis intervals above the adhesive application table of the substrate, for isolating the adhesive adsorbed by the adsorption assembly from the panel on the adhesive application table, and the pressure rollers moving along the X-axis... There is at least one release roller at the front and back of the pressure roller in the axial direction. The position of the release roller behind the pressure roller is constant, while the position of the release roller in front of the pressure roller is movable. The adsorption assembly includes two adsorption units that can approach each other synchronously to bend the adsorbed adhesive. The pressure roller descends along the Z-axis to press the adhesive onto the panel from the bend. The pressure roller then moves along the X-axis to press a portion of the adhesive onto the panel and push it away from the front release roller. The adhesive application table moves the panel and adhesive towards the front of the pressure roller so that all the adhesive is pressed onto the panel by the pressure roller.

[0007] Furthermore, the pressing assembly also includes a lifting shaft and a swing arm. The lifting shaft is axially aligned with the Y-axis and can move along the Z-axis. The pressure roller is axially parallel to the lifting shaft. One end of the swing arm is rotatably connected to the lifting shaft, and the other end is rotatably connected to the pressure roller.

[0008] Furthermore, the lifting shaft is fixedly connected to the piston rod of a pneumatic or hydraulic cylinder arranged along the Z-axis.

[0009] Furthermore, a torsion spring is fitted onto the lifting shaft, with one end of the torsion spring connected to the lifting shaft and the other end connected to the swing arm.

[0010] Furthermore, the release roller's shaft seat located in front of the pressure roller is slidably connected to a guide rail. An elastic element is provided between the shaft seat and the guide rail. The guide rail is tilted and raised in front of the pressure roller. A roller is provided on the shaft seat through a connecting rod. The pressure roller pushes the corresponding release roller away from the panel and the backing adhesive by squeezing the roller and causes the elastic element to store energy.

[0011] Furthermore, the elastic element includes a tension spring, one end of which is connected to the shaft seat and the other end of which is connected to the bracket of the guide rail.

[0012] Furthermore, the adsorption assembly also includes a lifting plate that is movable along the Z-axis on the substrate. Two rotating rods that are distributed in a V-shape are rotatably connected to the lifting plate. The other ends of the two rotating rods are rotatably connected to the mounting brackets of the two adsorption units in a one-to-one correspondence. The lifting plate is also provided with a drive assembly that drives the two rotating rods to rotate synchronously in opposite directions.

[0013] Furthermore, a guide rod and a first driving member are fixedly installed on the base plate, and the lifting plate is slidably connected to the guide rod along the Z-axis. The first driving member is used to drive the lifting plate to move along the guide rod.

[0014] Furthermore, the drive assembly includes guide slots respectively formed on the two rotating rods, a sliding part slidably connected to the two guide slots, and a second drive member that drives the sliding part to move along the Z-axis.

[0015] Furthermore, the adsorption unit includes a mounting frame and multiple suction cups fixedly mounted on the mounting frame.

[0016] Compared to existing technologies, the adhesive bonding device provided by this invention uses two adsorption units that simultaneously approach to bend the adhesive backing. A pressure roller descends and presses the adhesive backing onto the panel from the bend. An adsorption unit located in front of the pressure roller releases the adhesive backing, and the pressure roller moves forward to bond a portion of the adhesive backing onto the panel. Subsequently, the bonding table moves the panel and adhesive backing forward along the pressure roller, allowing the remaining adhesive backing to adhere to the panel. The starting point of contact between the adhesive backing and the panel is the bend in the adhesive backing, not its end. This prevents the adhesive backing from accumulating and wrinkling when the pressure roller begins to press it onto the panel. Furthermore, a release roller separates the adhesive backing from the panel before it is bonded. As the pressure roller pushes the adhesive forward, it gradually adheres to the panel, ensuring that any air between the adhesive backing and the panel is fully expelled. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the adsorption unit picking up the adhesive in an embodiment of the present invention; Figure 2 This is a front view of the structure of the adsorption unit picking up the adhesive according to an embodiment of the present invention; Figure 3 This is a top view of the structure of the adsorption unit picking up the adhesive in an embodiment of the present invention; Figure 4 This is a structural diagram of the adhesive-backed aligned panel provided in an embodiment of the present invention. Figure I ; Figure 5 This is a structural diagram of the adhesive-backed aligned panel provided in an embodiment of the present invention. Figure II ; Figure 6 This is a front view of the structure of the adhesive-backed aligned panel provided in an embodiment of the present invention; Figure 7 This is a rear view of the structure of the adhesive-backed aligned panel provided in an embodiment of the present invention; Figure 8 This is a top view of the structure of the adhesive-backed aligned panel provided in an embodiment of the present invention; Figure 9 This is a front view of the structure of the adsorption unit with bent adhesive provided in an embodiment of the present invention; Figure 10 This is a rear view of the structure of the adsorption unit with bent adhesive provided in an embodiment of the present invention; Figure 11 This is a front view of the structure provided in an embodiment of the present invention, showing the pressure roller pressing the bent part of the adhesive backing onto the panel; Figure 12 This is a front view of the structure provided in an embodiment of the present invention, showing the pressure roller pressing the adhesive portion onto the panel. Figure 13 This is a schematic diagram of the adhesive bonding assembly provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of the structure of the adsorption component provided in an embodiment of the present invention; Figure 15 This is a schematic diagram of the installation structure of the release roller located in front of the pressure roller, provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Adhesive application table; 2. Substrate; 3. Guide rod; 4. Lifting plate; 5. First driving component; 6. Rotating rod; 7. Guide groove; 8. Adsorption unit; 81. Mounting bracket; 82. Suction cup; 9. Sliding part; 10. Second driving component; 11. Third driving component; 12. Lifting shaft; 13. Swing rod; 131. Limiting block; 14. Torsion spring; 15. Pressure roller; 16. Release roller; 17. Shaft seat; 18. Guide rail; 19. Connecting rod; 20. Roller; 21. Tension spring; 22. Bracket; 23. Adhesive backing; 24. Panel. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Please see Figures 1-15 This invention provides an adhesive bonding device, which mainly includes an adhesive application table 1, a substrate 2, an adsorption assembly, a pressing assembly, and multiple release rollers 16. The adhesive application table 1 moves along the X-axis, specifically driven by a cylinder or lead screw, and is used to place the panel 24 to be coated with adhesive. The substrate 2 is mounted on a cross slide (not shown in the figure, using existing technology), and the substrate 2 can move along the X-axis and Y-axis. The adsorption assembly is mounted on the substrate 2 and can move along the Z-axis on the substrate 2.

[0022] See Figure 14The adsorption assembly specifically includes a lifting plate 4, two rotating rods 6, two adsorption units 8, and a driving assembly. A first driving component 5 and multiple guide rods 3 are fixedly mounted on the base plate 2. The guide rods 3 are arranged along the Z-axis, and the lifting plate 4 is slidably connected to the guide rods 3 along the Z-axis. The first driving component 5 is located on the base plate 2 and is used to drive the lifting plate 4 to move along the guide rods 3. The adsorption unit 8 includes a mounting frame 81 and multiple suction cups 82 fixedly connected to the mounting frame 81. The suction cups 82 are used to adsorb the non-adhesive surface of the adhesive 23, and the two adsorption units 8 adsorb the adhesive at intervals. One end of the two rotating rods 6 is coaxially rotatably connected to the lifting plate 4. The height of the common axis of rotation of the two rotating rods 6 is lower than the height of the adhesive adsorbed by the suction cups 82, and the two rotating rods 6 are V-shaped relative to each other. The other ends of the two rotating rods 6 are rotatably connected to the mounting frames 81 of the two adsorption units 8 one-to-one. The driving assembly is located on the lifting plate 4 and is used to drive the two rotating rods 6 to rotate synchronously in opposite directions, thereby causing the two adsorption units 8 to flip towards each other. The two adsorption units 8 approach synchronously to make the adsorbed adhesive bend.

[0023] The drive assembly includes a guide groove 7, a sliding part 9, and a second drive member 10. There are two guide grooves 7, which are respectively opened on two rotating rods 6. The length direction of the guide groove 7 is consistent with the length direction of the rotating rod 6. The sliding part 9 has two sliding columns, which are slidably connected to the two guide grooves 7 in a one-to-one correspondence. That is, the sliding part 9 can simultaneously slide with the two guide grooves 7. A sliding structure in the Z-axis direction can be added between the sliding part 9 and the lifting plate 4. The second drive member 10 is installed on the lifting plate 4 and is used to drive the sliding part 9 to move along the Z-axis. Through the sliding engagement between the sliding part 9 and the two guide grooves 7, the two rotating rods 6 are driven to rotate synchronously in opposite directions.

[0024] See Figure 13 The adhesive pressing assembly includes a lifting shaft 12, a swing arm 13, and a pressure roller 15. The lifting shaft 12 is axially aligned with the Y-axis and is driven by a third drive unit 11 to move along the Z-axis. A sliding structure along the Z-axis can be added between the lifting shaft 12 and the substrate 2 or the fixed base. The third drive unit 11 is a cylinder or hydraulic cylinder arranged along the Z-axis, and the lifting shaft 12 is fixedly connected to the piston rod of the cylinder or hydraulic cylinder. The pressure roller 15 is axially parallel to the lifting shaft 12 and is located on the perpendicular bisector of the line connecting adjacent suction cups 82 of the two adsorption units 8. The lower end of the swing arm 13 is rotatably connected to the pressure roller 15, and the upper end is rotatably connected to the lifting shaft 12. A torsion spring 14 is sleeved on the lifting shaft 12, with one end connected to the lifting shaft 12 and the other end connected to the swing arm 13. A limiting mechanism is provided between the rocker arm 13 and the lifting shaft 12 to limit the rotation stroke of the rocker arm 13. The limiting mechanism is preferably a limiting block 131 fixedly connected to the upper end of the rocker arm 13. The elastic force of the torsion spring 14 applies a force to the rocker arm 13 to rotate relative to the lifting shaft 12. This force drives the rocker arm 13 to rotate until the limiting block 131 abuts against the piston rod.

[0025] When the adsorption assembly moves the adhesive backing to align with the product panel on the adhesive application table 1, and the two adsorption units 8 approach synchronously to bend the adsorbed adhesive backing, the third drive component 11 drives the lifting shaft 12 to descend a first stroke. The lifting shaft 12 drives the pressure roller 15 to descend along the Z-axis via the swing arm 13. The pressure roller 15 presses the adhesive backing onto the panel from the center of the bend. Immediately afterwards, the third drive component 11 drives the lifting shaft 12 to descend a second stroke. Since the pressure roller 15 cannot descend further, the swing arm 13 rotates against the elastic force of the torsion spring 14. The pressure roller 15 moves along the X-axis to push the adhesive backing, adhering a portion of the adhesive backing to the panel. The elastic force of the torsion spring 14 enables the pressure roller 15 to apply pressure to the adhesive backing to help it adhere firmly. Since the starting point of the contact between the adhesive backing and the panel is the bend of the adhesive backing, not the end of the adhesive backing, the pressure roller 15 does not cause the adhesive backing to accumulate or wrinkle when it begins to press.

[0026] Each release roller 16 is axially aligned with the Y-axis and spaced apart along the X-axis above the adhesive application platform 1 on the substrate 2. The release rollers 16 isolate the adhesive adsorbed by the suction assembly from the panel on the adhesive application platform 1, ensuring that the adhesive does not adhere to the panel after the suction cup 82 releases the adhesive and before the pressure roller 15 pushes it. The release rollers 16 are positioned as close as possible to the panel in height. At least one release roller 16 is located before and after the pressure roller 15 along the X-axis. The release roller 16 behind the pressure roller 15 is mounted on the substrate 2 or a fixed base via a bracket 22, maintaining a constant position.

[0027] The release roller 16, positioned in front of the pressure roller 15 (in the direction the pressure roller 15 advances along the X-axis during the second stroke of the lowering shaft 12), is movably arranged. For details, please refer to [link to relevant documentation]. Figure 15 The release roller 16, located in front of the pressure roller 15, has its bearing seat 17 slidably connected to a guide rail 18. An elastic element, preferably a tension spring 21, is provided between the bearing seat 17 and the guide rail 18. One end of the tension spring 21 is connected to the bearing seat 17, and the other end is connected to a bracket 22 of the guide rail 18. The bracket 22 is fixedly connected to the base plate 2 or a fixed foundation. The guide rail 18 is tilted and raised in front of the pressure roller 15, and a roller 20 is provided on the bearing seat 17 via a connecting rod 19. As the pressure roller 15 presses the adhesive backing onto the panel from the curved part of the adhesive backing and pushes the adhesive backing along the X-axis, the pressure roller 15 also squeezes the roller 20, causing the corresponding release roller 16 to tilt and move upward along the guide rail 18 in front of the pressure roller 15. The release roller 16 is pushed away from the panel and the adhesive backing, so that the adhesive backing can be gradually pushed and adhered to the panel by the pressure roller 15. This helps to fully remove the air between the adhesive backing and the panel. During this period, the movement of the release roller 16 also causes the elastic element to deform and store energy so that the release roller 16 can be reset later. Moreover, since the guide rail 18 is tilted and raised in front of the pressure roller 15, after the release roller 16 is pushed away from the panel and the adhesive backing, it is higher than the adhesive backing adhered to the panel. Therefore, when the adhesive application table 1 moves the panel and the adhesive backing forward of the pressure roller 15 later, the release roller 16 will not touch the adhesive backing.

[0028] During operation, the adsorption component uses suction cup 82 to pick up the adhesive backing with the film already peeled off on the bottom surface. At the loading / unloading station, the adhesive-coated product panel is placed into the positioning slot on the adhesive-coating table 1. Figures 1-3 As shown; the adhesive application table 1 moves along the X-axis to the adhesive application station directly below each release roller 16. The adsorption assembly moves the adhesive to the top of the panel and aligns it via the substrate 2. The first drive unit 5 drives the adsorption assembly to descend, causing the adhesive to come into contact with each release roller 16 on the adhesive surface. Figures 4-8 As shown; the second driving member 10 drives the sliding part 9 to move upward along the Z-axis. The sliding part 9 slides with the two guide grooves 7, causing the two rotating rods 6 to rotate synchronously in opposite directions and close together. The two adsorption units 8 flip towards each other and approach each other, causing the adsorbed adhesive to bend, as shown. Figures 9-10 As shown; the third drive component 11 drives the lifting shaft 12 to descend by the first stroke, and the lifting shaft 12, through the swing arm 13, causes the pressure roller 15 to press the adhesive onto the panel from the center position of the adhesive bend, as shown. Figure 11 As shown; the adsorption unit 8 located in front of the pressure roller 15 releases the adhesive, and the adhesive droops onto the movable release roller 16; then the third drive member 11 drives the lifting shaft 12 to descend a second stroke, and the lifting shaft 12 rotates through the swing arm 13 to make the pressure roller 15 move along the X-axis to push the adhesive, adhering a part of the adhesive to the panel. The pressure roller 15 also squeezes the roller 20, causing the corresponding release roller 16 to tilt upward along the guide rail 18 in front of the pressure roller 15. The release roller 16 is pushed away from the panel and the adhesive, and at the same time the elastic element stores energy, such as Figure 12 As shown; then another adsorption unit 8 releases the adhesive backing, and the adhesive backing droops onto the release roller 16 which is fixed in position; the adhesive application table 1 moves the panel and the adhesive backing towards the front of the pressure roller 15, and the adhesive backing is gradually pressed onto the panel by the pressure roller 15. The release roller 16 helps to fully remove the air between the adhesive backing and the panel. During this period, the torsion spring 14 continuously provides pressure on the adhesive backing to the pressure roller 15, so that the adhesive backing is firmly adhered to the panel.

[0029] After the adhesive is applied, the adhesive application table 1 moves the panel with the adhesive backing from the adhesive application station to the loading and unloading station, whereby the panel with the adhesive backing can be removed from the adhesive application table 1. As the third drive component 11 drives the lifting shaft 12 to move upward, the pressure roller 15 gradually retracts along the X-axis, releasing the elastic force of the elastic element, causing the corresponding release roller 16 to tilt and descend along the guide rail 18 to reset.

[0030] In the above technical solution, the first driving component 5, the second driving component 10 and the third driving component 11 all output linear driving force, and adopt driving components such as cylinders, hydraulic cylinders, electric push rods or linear motors.

[0031] It should be noted that the X-axis, Y-axis and Z-axis are mutually perpendicular, with the X-axis and Y-axis lying on the horizontal plane and the Z-axis in the vertical direction.

[0032] In this invention, the starting point for the contact between the adhesive backing and the panel is the curved part of the adhesive backing, not the end of the adhesive backing. Therefore, when the pressure roller 15 starts to press the adhesive backing, the adhesive backing will not accumulate or wrinkle. Furthermore, before the adhesive backing is applied to the panel, a release roller 16 separates the adhesive backing from the panel. The adhesive backing gradually adheres to the panel under the forward push of the pressure roller 15, thereby fully removing the air between the adhesive backing and the panel.

[0033] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An adhesive bonding device, comprising an adhesive application stage moving along the X-axis, a substrate disposed on a cross slide, and an adsorption assembly disposed on the substrate moving along the Z-axis, characterized in that: It also includes a pressure bonding assembly and multiple release rollers; The adhesive bonding assembly includes a pressure roller, which is capable of moving along the Z-axis and the X-axis. Each release roller is arranged above the adhesive application table of the substrate with its axial direction in the Y-axis direction and its X-axis spacing, in order to isolate the backing adhesive adsorbed by the adsorption component from the panel on the adhesive application table. The pressure roller has at least one release roller in front of and behind it in the X-axis direction, the position of the release roller behind the pressure roller is constant, and the position of the release roller in front of the pressure roller is movably arranged. The adsorption assembly includes two adsorption units, which can approach each other synchronously to bend the adsorbed adhesive. The pressure roller descends along the Z-axis to press the adhesive backing onto the panel from the bend. The pressure roller then moves along the X-axis to press a portion of the adhesive backing onto the panel and push it away from the release roller in front. The adhesive application table moves the panel and adhesive backing towards the front of the pressure roller so that all the adhesive backing is pressed onto the panel by the pressure roller.

2. The adhesive bonding device according to claim 1, characterized in that, The pressing assembly also includes a lifting shaft and a swing arm. The lifting shaft is axially aligned with the Y-axis and can move along the Z-axis. The pressure roller is axially parallel to the lifting shaft. One end of the swing arm is rotatably connected to the lifting shaft, and the other end is rotatably connected to the pressure roller.

3. The adhesive bonding device according to claim 2, characterized in that, The lifting shaft is fixedly connected to the piston rod of a pneumatic or hydraulic cylinder arranged along the Z-axis.

4. The adhesive bonding device according to claim 2, characterized in that, A torsion spring is fitted on the lifting shaft, with one end of the torsion spring connected to the lifting shaft and the other end connected to the swing arm.

5. The adhesive bonding device according to claim 1, characterized in that, The release roller, located in front of the pressure roller, has its shaft seat slidably connected to a guide rail. An elastic element is provided between the shaft seat and the guide rail. The guide rail is tilted and raised in front of the pressure roller. A roller is provided on the shaft seat via a connecting rod. The pressure roller pushes the corresponding release roller away from the panel and the backing adhesive by squeezing the roller, and the elastic element stores energy.

6. The adhesive bonding device according to claim 5, characterized in that, The elastic element includes a tension spring, one end of which is connected to the shaft seat and the other end of which is connected to the bracket of the guide rail.

7. The adhesive bonding device according to claim 1, characterized in that, The adsorption assembly also includes a lifting plate that is movable on the substrate along the Z-axis. Two rotating rods that are distributed in a V-shape are rotatably connected to the lifting plate. The other ends of the two rotating rods are rotatably connected to the mounting brackets of the two adsorption units in a one-to-one correspondence. The lifting plate is also provided with a drive assembly that drives the two rotating rods to rotate synchronously in opposite directions.

8. The adhesive bonding device according to claim 7, characterized in that, A guide rod and a first driving component are fixedly installed on the base plate. The lifting plate is slidably connected to the guide rod along the Z-axis. The first driving component is used to drive the lifting plate to move along the guide rod.

9. The adhesive bonding device according to claim 7, characterized in that, The drive assembly includes guide slots respectively opened on two rotating rods, a sliding part that is slidably connected to the two guide slots, and a second drive member that drives the sliding part to move along the Z-axis.

10. The adhesive bonding device according to claim 1, characterized in that, The adsorption unit includes a mounting frame and multiple suction cups fixedly mounted on the mounting frame.

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