A film pasting device and an automatic pasting method of a screen protection film

Abstract

The application discloses a kind of film pasting equipment and the automatic method of screen protection film, method includes the following steps: the electronic equipment is positioned and fixed;Protection film is placed on the load-bearing part suspended on the left and right sides above screen, control film material alignment mechanism from left and right sides and front and back sides to protection film exert push force, so that protection film and screen reach preset central alignment;Control a rolling mechanism to perform the following actions: drive rolling mechanism and press down protection film to the first down pressure position of screen in the first mechanical trigger bit, to adhere the protection film between the first down pressure position and the first side edge of screen to screen;Drive rolling mechanism and press down protection film to the second down pressure position of screen in the second mechanical trigger bit, to adhere the protection film between the second down pressure position and the second side edge of screen to screen.Solve the problem that traditional film pasting is not accurate, poor exhaust path, rely on complex electric control timing and lead to low yield, poor reliability.

Description

Technical Field

[0001] This invention relates to the field of screen protector technology, and in particular to a screen protector application device and an automated application method for screen protectors. Background Technology

[0002] In the field of automated screen protector production, the process design of the film application directly determines the efficiency and final quality of the bonding. Existing automated film application methods can be summarized into several main steps: workpiece loading and fixing, protective film loading and pre-alignment, and final film bonding. Current mainstream methods have room for optimization in the core "alignment" and "bonding" stages. In the alignment stage, a common method is to use mechanical limits or simple visual guidance to roughly push the protective film above the screen area. This method lacks precise closed-loop feedback and step-by-step correction, making it difficult to achieve accurate center alignment between the protective film and the screen, creating potential deviations for subsequent bonding. In the bonding stage, the industry generally uses two approaches: one is "one-time unidirectional rolling," where the rolling head moves linearly from one end of the screen to the other to complete the bonding. This method is prone to generating air bubbles due to long-distance pushing for large or curved screens, and the initial error of the film material will be amplified along the way. Secondly, the "pressing from the center to both sides" method, while improving alignment to some extent, pushes air to both edges simultaneously, easily causing air bubbles to accumulate at the left and right ends and in the middle, resulting in an unclear exhaust path. Regardless of the bonding path, the timing of the rolling head's downward press action typically relies on preset program coordinates or photoelectric sensor signals. This method, dependent on the timing of the electronic control system, suffers from bottlenecks in stability and anti-interference capabilities; even a single signal jitter can cause bonding defects. Furthermore, the entire process often lacks intelligent linkage with preceding and following processes (such as precision dust removal and online quality inspection after bonding), failing to form an efficient, reliable, and traceable closed-loop process. Therefore, a novel automated film bonding process is urgently needed. This method should achieve precise step-by-step alignment of the protective film and employ a bidirectional, partitioned rolling bonding logic that is directly triggered by physical position, without relying on complex electronic control timing, thereby fundamentally improving the precision, yield, and reliability of film bonding at the process level. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention provides an automatic bonding method for screen protectors and a screen bonding device, thereby solving the problems of low bonding yield and poor reliability caused by inaccurate alignment, poor bonding and exhaust paths, and reliance on complex electronic control timing in traditional automatic bonding processes.

[0004] This invention is achieved using the following technical solution: An automated method for applying a screen protector includes the following steps: Position and fix the electronic device to be covered with the film; The protective film is placed on a support portion suspended above the screen on the left and right sides. A film alignment mechanism is controlled to apply a pushing force to the protective film from the left and right sides and the front and back sides, so that the protective film and the screen are aligned to a preset center. After alignment is completed, control a rolling mechanism to perform the following actions: Drive the rolling mechanism to move along the first direction, press the protective film down to the first pressing position of the screen at the first mechanical trigger position, and then continue to move horizontally along the first direction to roll the protective film between the first pressing position and the first side edge of the screen in one direction to adhere it to the screen. The rolling mechanism is driven to move along a second direction opposite to the first direction, and at the second mechanical trigger position, the protective film is pressed down to the second pressing position of the screen. Then, it continues to move horizontally along the second direction to roll the protective film between the second pressing position and the second side edge of the screen in one direction to adhere it to the screen.

[0005] Furthermore, the protective film is first subjected to symmetrical constraint thrust from the left and right directions by the left and right thrust modules, which forces the longitudinal geometric center line of the protective film to move closer to the longitudinal geometric center line of the screen until they coincide.

[0006] Furthermore, by applying opposing thrusts to the protective film from the front and rear directions through the front and rear thrust modules, the horizontal geometric center line of the protective film is automatically aligned with the horizontal geometric center line of the screen.

[0007] Furthermore, both the first pressing position and the second pressing position are offset from the horizontal geometric center line of the screen, and the first pressing position and the second pressing position are configured such that the pressing area formed by the two unidirectional rolling presses has an overlapping area in the middle of the screen.

[0008] A screen protector application device employs the aforementioned automated application method. The device includes a film alignment mechanism for fixing an electronic device, a film alignment mechanism for automatically aligning the protective film with the screen, and a rolling mechanism for pressing the protective film onto the screen. The rolling mechanism includes a horizontally moving part that can reciprocate along a horizontal path, a lifting part that is vertically and vertically mounted on the horizontally moving part, a rolling actuator mounted on the lifting part, at least two guide rails for driving the lifting part to move vertically relative to the horizontally moving part, and a trigger engagement member that mechanically interacts with the guide rails. The trigger engagement member is mounted on the lifting part and configured to move along a guide rail path. The guide rails are movably mounted on the guide rail path. When the trigger engagement member interacts with one of the guide rails, the lifting part is forced to carry the rolling actuator to press down the protective film, achieving unidirectional rolling of a first side area of ​​the screen. When the trigger engagement member interacts with the other guide rail, the lifting part is forced to carry the rolling actuator to press down the protective film, achieving unidirectional rolling of a second side area of ​​the screen.

[0009] Furthermore, the track-changing path includes a high-level segment path and a low-level segment path. The track-changing unit is movably disposed at the junction of the high-level segment path and the low-level segment path, and the track-changing unit has a first position and a second position. In the first position, the track-changing unit is flush with the high-level segment path, and in the second position, the track-changing unit connects the high-level segment path and the low-level segment path.

[0010] Furthermore, the left and right clamping parts of the positioning mechanism are integrated with a support portion. When the electronic device is fixed by the left and right clamping parts, the support portion is automatically positioned above the left and right sides of the screen to support the left and right edges of the protective film.

[0011] Furthermore, the membrane alignment mechanism includes a left and right thrust module and a front and rear thrust module arranged opposite to each other. The left and right thrust module is used to apply thrust to the protective membrane supported on the bearing part from the left and right sides, and the front and rear thrust module is used to apply thrust to the protective membrane from the front and rear ends.

[0012] Furthermore, the left and right thrust modules are configured with a first force-applying part and a second force-applying part on the surface that applies thrust to the protective film; the first force-applying part has a rigid contact surface, the second force-applying part has an elastic contact surface, and the second force-applying part is connected to an electronically controlled drive component to drive it to switch between an extended working position and a retracted avoidance position.

[0013] Furthermore, the front and rear thrust modules are configured with a third force-applying part and a fourth force-applying part on the surface that applies thrust to the protective film. The third force-applying part has a rigid contact surface, and the fourth force-applying part has an elastic contact surface. The fourth force-applying part is connected to an electronically controlled drive unit to drive it to switch between an extended working position and a retracted avoidance position.

[0014] Compared with the prior art, the beneficial effects of the present invention include at least the following: This invention applies a pushing force to the protective film from both sides via a film alignment mechanism. The pushing force is applied to the protective film from both sides and from both the top and bottom, ensuring that the protective film is aligned with the screen at a preset center position. This eliminates the need for a camera, image processor, and complex control algorithms, significantly reducing the manufacturing cost and lowering the barrier to entry for the device. This makes it more suitable for low-cost consumer-grade screen protector applicators and solves the problem of high costs associated with existing visual alignment solutions. Furthermore, the method of this application requires no special processing of the protective film and no additional positioning structure, avoiding increased film production costs and material waste. Simultaneously, this method is not dependent on a specific type of positioning mold, offering better versatility and adaptability to different sized mobile phone screens, solving the problems of poor versatility and cumbersome operation of existing mechanical positioning methods. Furthermore, this invention employs a unique bidirectional partitioned rolling bonding logic, combined with a core bonding logic of mechanically triggered bidirectional partitioned rolling that involves "triggered from non-center points on both sides, bidirectional unidirectional rolling." This creates a clear and short exhaust path for air under the protective film, effectively eliminating bonding air bubbles and ensuring extremely high alignment and coverage accuracy between the protective film and the screen, significantly reducing the defect rate. Simultaneously, this method integrates alignment and bonding into a fully automated operation, reducing manual intervention and improving production efficiency. The downward pressure triggering of the bonding action relies on purely mechanical interaction and preset positions, eliminating the dependence on complex electronic control timing. This makes the system highly resistant to interference and operates stably and reliably, making it particularly suitable for high-speed, continuous production environments. It effectively solves the problems of low bonding yield and poor reliability caused by inaccurate alignment, poor bonding exhaust paths, and reliance on complex electronic control timing in traditional film bonding. Attached Figure Description

[0015] Figure 1 This is a flowchart of an automated screen protector lamination method according to an embodiment of the present invention; Figure 2 This is one of the schematic diagrams of the film application device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the positioning mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the left and right thrust modules in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the protective film placed on the support portion according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the front and rear thrust modules in an embodiment of the present invention; Figure 7 This is a schematic diagram of the rolling mechanism according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the layout of the four track-changing units in the track-changing path according to an embodiment of the present invention; Figure 9This is a schematic diagram of the state of each track-changing part when the rolling mechanism of the present invention performs unidirectional rolling on the first side area of ​​the screen; Figure 10 This is a schematic diagram of the state of each track-changing part when the rolling mechanism of the present invention performs unidirectional rolling on the second side area of ​​the screen; Figure 11 This is a second schematic diagram of the film application device according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the limiting mechanism according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the internal structure of the chassis according to an embodiment of the present invention; In the diagram: 1. Chassis; 10. Support platform; 11. Horizontal path; 12. High-position path; 13. Low-position path; 2. Positioning mechanism; 21. Left and right clamping parts; 22. Front and rear clamping parts; 31. Supporting part; 32. Left and right thrust module; 321. First force application part; 322. Second force application part; 323. Electrically controlled drive component; 33. Front and rear thrust module; 331. Third force application part; 332. Fourth force application part; 4. Rolling mechanism; 41. Horizontal moving part; 42. Lifting part; 43. Trigger mating part; 44. Track changing part; 441. First track changing part; 442. Second track changing part; 443. Third track changing part; 444. Fourth track changing part; 45. Roller; 46. Rolling actuator; 5. Limiting mechanism; 6. Motor; 7. Gear and rack pair; 8. Protective film; 9. Electronic equipment. Detailed Implementation

[0016] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided to make the invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0017] The terms used to express position and direction in this invention are illustrated with reference to the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this invention.

[0018] like Figures 1 to 13 As shown, the present invention provides an automated screen protector application method, comprising the following steps: Position and fix the electronic device 9 to be coated; The protective film 8 is placed on a support part 31 suspended on the left and right sides above the screen. A film alignment mechanism is controlled to apply a pushing force to the protective film 8 from the left and right sides and the front and back sides, so that the protective film 8 is aligned with the screen in a preset center position. After alignment is completed, the rolling mechanism 4 is controlled to perform the following actions: Drive the rolling mechanism 4 to move along the first direction, press the protective film 8 down to the first pressing position of the screen at the first mechanical trigger position, and then continue to move horizontally along the first direction to roll the protective film 8 between the first pressing position and the first side edge of the screen in one direction to adhere it to the screen. The rolling mechanism 4 is driven to move along a second direction opposite to the first direction to the second mechanical trigger position to press the protective film 8 down to the second pressing position of the screen. Then it continues to move horizontally along the second direction to roll the protective film 8 between the second pressing position and the second side edge of the screen in one direction to adhere it to the screen.

[0019] In this embodiment, the first mechanical trigger position and the second mechanical trigger position refer to physical trigger points set on the moving path of the rolling mechanism 4. When the rolling mechanism 4 reaches these positions, it will trigger its downward pressing action through mechanical action, pressing the protective film 8 down onto the screen surface. The first pressing position and the second pressing position refer to the starting point where the protective film 8 is first pressed down on the screen by the rolling mechanism 4. These two positions are the starting points of bidirectional rolling bonding, corresponding to the rolling stroke in the first direction and the second direction, respectively. Unidirectional rolling bonding refers to the bonding method in which the rolling actuator 46 starts from a pressing position and moves continuously in one direction, gradually pressing the protective film 8 to the edge of the screen.

[0020] This method can be performed by a screen protector applicator that integrates automatic alignment and bonding functions. The applicator is designed to autonomously complete the entire bonding process, thereby reducing manual intervention and improving production efficiency and consistency. For example, the applicator may include a chassis 1, a positioning mechanism 2 for fixing the electronic device 9, a film alignment mechanism for automatically aligning the protective film 8 with the screen, and a rolling mechanism 4 for pressing the protective film 8 onto the screen. The method first positions and fixes the electronic device 9 (such as a smartphone) to be coated using the positioning mechanism 2, ensuring that it does not shift during the bonding process. Then, the screen is automatically or manually cleaned. Automatic cleaning can use an ionizer or a dust removal device to remove dust from the screen surface of the electronic device 9. After cleaning, a screen protector 8 is placed on the support 31. Subsequently, the control system sends instructions to the film alignment mechanism to apply pushing force to the protective film 8 from the left, right, front, and back sides, so that the protective film 8 is aligned with the screen at a preset center position. After the protective film 8 is precisely aligned with the screen, the rolling mechanism 4 begins the bonding action. The rolling mechanism 4 is driven to move along the longitudinal direction (first direction) of the screen. When the rolling mechanism 4 moves to the first mechanical trigger position, its trigger engagement 43 presses against the first track-changing part 441 provided on the track-changing path. The pressing action of the first track-changing part 441, through a mechanical linkage mechanism, immediately triggers the trigger engagement 43 of the rolling mechanism 4 to descend, precisely pressing the protective film 8 onto the first pressing position of the screen. Subsequently, the rolling mechanism 4 continues to move horizontally along the first direction, and from the first pressing position, performs unidirectional rolling towards the first side edge of the screen, gradually and evenly adhering the protective film 8 onto the screen, while simultaneously expelling air towards the first side edge. After completing the rolling of the first side of the screen, the rolling mechanism 4 is driven to move along the second direction opposite to the first direction (i.e., the other side of the longitudinal direction of the screen). When the rolling mechanism 4 moves to the second mechanical trigger position, its trigger engagement 43 presses against the third track-changing part 443. The pressure of the third track-changing section 443 is also triggered by a mechanical linkage mechanism, causing the trigger mating part 43 of the rolling mechanism 4 to descend and press the protective film 8 onto the second pressing position of the screen. Subsequently, the rolling mechanism 4 continues to move horizontally in the second direction, and from the second pressing position, performs unidirectional rolling towards the second side edge of the screen, gradually and evenly adhering the protective film 8 to the screen, while simultaneously expelling air towards the second side edge. Through this bidirectional partitioned rolling method, air can be effectively expelled from the center of the screen to the two side edges, greatly reducing the generation of air bubbles.

[0021] Compared to existing technologies that rely on visual alignment, this application uses a film alignment mechanism to apply pushing force to the protective film 8 from both the left and right sides and the front and back sides, ensuring that the protective film 8 is aligned with the screen at a preset center position. This avoids the need for a camera, image processor, and complex control algorithms, significantly reducing the manufacturing cost and lowering the barrier to entry for the device. This makes it more suitable for low-cost consumer-grade screen protector applicators and solves the problem of high costs associated with existing visual alignment solutions. Furthermore, compared to existing mechanical positioning methods that add positioning structures (such as pull strips or positioning holes) to the protective film 8, this application's method requires no special processing of the protective film 8 and eliminates the need for additional positioning structures, thus avoiding increased film production costs and material waste. Simultaneously, this method is not dependent on a specific type of positioning mold, offering better versatility and adaptability to different sized mobile phone screens, solving the problems of poor versatility and cumbersome operation associated with existing mechanical positioning methods.

[0022] Furthermore, addressing the issues of air bubble generation during "one-time unidirectional rolling" or air bubble accumulation in the center due to "pressing from the center to both sides" in existing technologies, this embodiment employs a unique bidirectional partitioned rolling bonding logic. Specifically, by "driving the rolling mechanism 4 to move along a first direction, pressing the protective film 8 down to the first pressing position of the screen at the first mechanical trigger position during the movement along the first direction, and then continuing to move horizontally along the first direction to unidirectionally roll and bond the protective film 8 between the first pressing position and the first side edge of the screen to the screen; driving the rolling mechanism 4 to move along a second direction opposite to the first direction, pressing the protective film 8 down to the second pressing position of the screen at the second mechanical trigger position during the movement along the second direction, and then continuing to move horizontally along the second direction to unidirectionally roll and bond the protective film 8 between the second pressing position and the second side edge of the screen to the screen," the screen is divided into two areas for unidirectional rolling. This partitioned strategy allows air to be effectively discharged from their respective pressing positions to the corresponding screen edges, significantly reducing the probability of air bubble generation and optimizing the exhaust path.

[0023] Furthermore, this embodiment innovates the pressing action triggering mechanism of the rolling mechanism 4. In the prior art, the pressing action of the rolling head usually relies on preset program coordinates or photoelectric sensor signals, and its stability is easily affected by timing fluctuations of the electronic control system and external interference. This embodiment achieves physical position triggering of the pressing action through mechanical triggering methods of "pressing the protective film 8 to the first pressing position of the screen at the first mechanical trigger position" and "pressing the protective film 8 to the second pressing position of the screen at the second mechanical trigger position". This ensures the accuracy and reliability of the pressing timing, avoids bonding defects caused by signal jitter or timing deviation, and thus improves the stability and anti-interference ability of the entire bonding process.

[0024] In summary, the automated bonding method of this embodiment effectively solves the core technical problems in the prior art, such as inaccurate film alignment, frequent air bubbles, and unstable triggering, through a combination of precise automatic alignment, bidirectional zoned rolling, and mechanically triggered pressing.

[0025] In a preferred embodiment, the protective film 8 is first subjected to symmetrical constraint thrust from the left and right directions by the left and right thrust module 32, which forces the longitudinal geometric center line of the protective film 8 to move closer to the longitudinal geometric center line of the screen until they coincide.

[0026] In this embodiment, opposing thrusts are applied to the protective film 8 from both the left and right sides. This is the specific physical means to achieve the left-right sliding of the protective film 8. The method of applying the thrust can be varied. For example, the left and right thrust modules 32, which apply opposing thrusts to both sides, can specifically be two symmetrically arranged linear modules. Each module is equipped with a thrust unit. The linear modules use pneumatic or electric push rods. By precisely controlling their stroke and force, stable pushing of the protective film 8 is achieved.

[0027] Specifically, the protective film 8 to be applied is simply placed on the left and right support parts 31 with its left and right edges as the support parts 31 limit it. Due to the limitation of the support parts 31, the protective film 8 is initially constrained to a general position in the width direction of the screen, but usually there is a certain random offset from the center of the screen. Then, opposing thrusts are applied to the protective film 8 from the left and right sides. For ease of understanding, the left and right thrust modules 32 are driven to move towards each other, contacting the left and right sides of the protective film 8 simultaneously from the left and right sides. Under the action of the symmetrical thrusts from the left and right, the protective film 8 is translated along the X-axis. When there is a deviation between the longitudinal geometric center line of the protective film 8 and the longitudinal geometric center line of the screen, the pusher block closer to the center line contacts the edge of the film first, while the pusher block farther from the center line has not yet contacted or has a smaller contact force. The resulting torque difference will automatically push the protective film 8 towards the center line until the two center lines coincide, at which point the contact force of the left and right pushers is balanced. This process does not require visual assistance or manual intervention and is completed automatically by the geometric constraints of the mechanical structure, realizing automatic alignment of the longitudinal center line. Alignment accuracy can reach ±0.1 mm, significantly improving the consistency and yield of automated film application.

[0028] The core of this invention lies in utilizing the self-centering effect under symmetrical constraints to achieve automatic alignment of the protective film 8. The principle is as follows: When the protective film 8 is supported only by its left and right edges (in a suspended state), its degree of freedom of movement in the X direction is unconstrained; the symmetrically applied thrusts from the left and right constitute a pair of collinear opposing forces, the resultant force of which is zero, but the resultant torque causes the centerline of the film to tend to coincide with the centerline of the thrust symmetry plane; when there is a deviation Δx between the centerline of the film and the centerline of the screen, the contact time or contact force between the two push blocks and the edge of the film is different, and the resulting restoring force is proportional to Δx, causing the film to automatically return to the center. This alignment method does not require sensors, vision systems, or manual calibration; it relies solely on the geometric constraints of the mechanical structure to achieve high-precision alignment. This significantly improves the alignment accuracy between the protective film 8 and the screen of the electronic device 9, ensures bonding quality, and reduces the scrap rate caused by misalignment, thereby improving the overall efficiency and reliability of automated bonding.

[0029] In a preferred embodiment, the protective film 8 is subjected to opposing thrusts from the front and rear directions by the front and rear thrust module 33, so that the horizontal geometric center line of the protective film 8 is automatically aligned with the horizontal geometric center line of the screen.

[0030] In this embodiment, this step aims to ensure that the protective film 8 is precisely aligned with the screen in the front-to-back direction, eliminating misalignment caused by deviations in the front-to-back direction. This step can be implemented in various ways. For example, the front and rear thrust modules 33 are located on the front and rear sides of the protective film 8, respectively. By controlling the extension and retraction of the front and rear thrust modules 33, opposing thrusts can be applied to the protective film 8. Alternatively, a movable thrust mechanism can be used to apply thrust to one side of the protective film 8, while a reaction force is provided on the other side through a fixed stop or friction.

[0031] Specifically, after left and right alignment, the control system controls the front and rear thrust modules 33 to move in opposite directions to apply opposing thrusts to the protective membrane 8 from the front and rear directions. For example, if the protective membrane 8 is biased forward, the rear thrust module will push the protective membrane 8 forward, while the front force application unit may provide slight reverse resistance or remain stationary until the protective membrane 8 moves backward. The reverse is also true. The automatic alignment principle in the front and rear direction is the same as the alignment principle in the left and right direction.

[0032] Through the above technical solution, in the automated application process of the screen protector 8, not only can the protector 8 be precisely aligned in the left-right direction, but furthermore, by introducing a front-back alignment step, the position of the protector 8 in the front-back direction can also be precisely adjusted. This comprehensive horizontal alignment capability effectively avoids problems such as misalignment or uneven edges caused by front-back deviations, significantly improving the alignment accuracy and application quality of the protector 8 and the screen of the electronic device 9. Ultimately, this ensures that the protector 8 can cover the screen in the best possible condition, enhancing the product's appearance and functional integrity.

[0033] Optionally, the alignment action of the membrane alignment mechanism includes sequentially executed left-right alignment steps and front-back alignment steps.

[0034] In this embodiment, by decomposing the alignment action of the film alignment mechanism into left-right alignment steps and front-back alignment steps, and clearly defining their sequential execution order, an efficient and stable alignment process is constructed. Specifically, after the protective film 8 is placed on the support part 31 of the film alignment mechanism, the left-right alignment step is initiated first. In this step, the left-right thrust module 32 is driven to apply opposing thrusts to the protective film 8 from the left and right sides until its longitudinal geometric center line is aligned with the longitudinal geometric center line of the screen of the electronic device 9. Once the left-right alignment is completed and stabilized, the control system triggers the front-back alignment step. In the front-back alignment step, the front-back thrust module 33 applies opposing thrusts to the protective film 8 from the front and back sides, causing the protective film 8 to translate in the front-back direction until its lateral geometric center line is aligned with the lateral geometric center line of the screen. This method of completing one dimension (e.g., left-right) alignment first, and then performing another dimension (e.g., front-back) alignment, ensures the independence and effectiveness of each adjustment action, avoiding mutual interference and accuracy loss that may occur due to simultaneous adjustments in multiple dimensions. By executing the process in this structured sequence, the entire horizontal alignment process is simplified, reducing the need for iterative adjustments. This not only significantly improves the efficiency and stability of horizontal alignment during automated bonding, but also enables more reliable high-precision alignment between the protective film 8 and the screen of the electronic device 9, laying a solid foundation for subsequent roll bonding and ultimately improving the overall bonding quality and production efficiency.

[0035] In a preferred embodiment, both the first pressing position and the second pressing position are offset from the longitudinal geometric center line of the screen, and the first pressing position and the second pressing position are configured such that the pressing area formed by the two unidirectional rolling presses has an overlapping area in the middle of the screen.

[0036] In this embodiment, the first pressing position refers to the starting point where the rolling actuator 46 first presses the protective film 8 onto the screen surface during its movement along the first direction. This position is the starting point for the protective film 8 to make contact with the screen and begin rolling bonding. Its function is to determine the initial contact point of the rolling bonding process, thereby affecting the subsequent rolling path and effect. For example, this position can be a preset coordinate point or a point dynamically calculated based on the screen size or characteristics of the protective film 8. The second pressing position refers to the starting point where the rolling actuator 46 first presses the protective film 8 onto the screen surface during its movement along the second direction opposite to the first direction. This position is the starting point for the second rolling bonding of the protective film 8 and the screen. Its function is similar to the first pressing position, jointly determining the distribution of the starting points for bidirectional rolling bonding. For example, this position can be symmetrically distributed with the first pressing position, or it can be asymmetrically set according to actual bonding requirements. The longitudinal geometric center line of the screen refers to the line connecting the midpoints of the two sides that bisect the screen along its length direction (usually the long side direction). Offset refers to the fact that the first and second pressing positions do not coincide spatially with the vertical geometric center line of the screen, but are at a certain distance from it. This offset can be to the left or right of the screen (if the vertical geometric center line is vertical). By offsetting both the first and second pressing positions from the vertical geometric center line of the screen, the starting points of the two rolling presses are not concentrated on the center line of the screen. This offset setting allows the rolling actuator 46 to roll towards the first side edge of the screen from the position off the center line after the first press, forming an initial bonding area. Subsequently, during the second press, the rolling actuator 46 rolls towards the second side edge of the screen from another position off the center line. In this way, the starting points of the two rolling presses are dispersed, avoiding excessive concentration of pressing or rolling in the central area of ​​the screen, thereby helping to push the protective film 8 outward more evenly from different starting points and reducing the generation and retention of air bubbles. This offset starting point design allows for a more rational distribution of the initial bonding points of the protective film 8 on the screen. This helps to more effectively expel air from the center of the screen to the side edges during the rolling process, thereby significantly reducing the probability of bubble formation and improving the uniformity of bonding and the final product's appearance quality. This solution provides a more stable and reliable bonding effect, especially when dealing with large-size screens or electronic devices 9 that require high bonding quality.

[0037] Specifically, when the rolling actuator 46 moves along the first direction and starts rolling unidirectionally from the first pressing position, a pressing area extending from the first pressing position to the first side edge of the screen is formed. Subsequently, when the rolling actuator 46 moves along the second direction and starts rolling unidirectionally from the second pressing position, another pressing area extending from the second pressing position to the second side edge of the screen is formed. By setting these two pressing positions on both sides of the central area of ​​the screen and ensuring that their respective rolling strokes cover the center of the screen, it is ensured that the two pressing areas intersect in the central part of the screen, forming an overlapping area. This design allows the center of the screen, i.e., the intersection of the two rolling actions, to receive double pressing, effectively solving the problem that in the automated bonding process, improper connection between the two unidirectional rolling actions may lead to unbonded areas or air bubbles remaining in the center of the screen. This overlapping pressing design ensures that the protective film 8 in the central area of ​​the screen can be fully and evenly pressed, significantly improving the integrity and reliability of the bonding, thereby improving the overall bonding quality of the screen protector 8 and reducing the scrap rate caused by bonding defects.

[0038] Specifically, when the rolling actuator 46 reaches a preset position slightly to the left of the screen's horizontal center line, for example, about one-third of the screen width from the left edge, the rolling actuator 46 presses down on the protective film 8 and begins unidirectional rolling towards the right edge until the right edge of the screen is reached. Then, the rolling actuator 46 returns and moves from the right side of the screen to the left. When the rolling actuator 46 reaches a preset position slightly to the right of the screen's horizontal center line, for example, about one-third of the screen width from the right edge, the rolling actuator 46 presses down on the protective film 8 and begins unidirectional rolling towards the left edge until the left edge of the screen is reached. In this way, the pressing area of ​​the first rolling action covers most of the right side of the screen, while the pressing area of ​​the second rolling action covers most of the left side of the screen, forming a clear overlapping area in the center of the screen, ensuring sufficient pressing of the central area of ​​the screen.

[0039] The present invention also provides a screen protector application device, which performs the screen protector application operation using the above-described automated application method. The screen protector application device includes a positioning mechanism 2 for fixing an electronic device 9, a film alignment mechanism for automatically aligning the protective film 8 with the screen, and a rolling mechanism 4 for pressing the protective film 8 down onto the screen. The rolling mechanism 4 includes a horizontal moving part 41 that can reciprocate along a horizontal path 11, a lifting part 42 that is vertically and vertically disposed on the horizontal moving part 41, a rolling actuator 46 mounted on the lifting part 42, at least two guide parts 44 for driving the lifting part 42 to generate a vertical displacement relative to the horizontal moving part 41, and a guide part that is connected to the guide part. A trigger engagement member 43, which engages in mechanical interaction, is mounted on a lifting unit 42 and configured to move along a track-changing path. The track-changing unit 44 is movably disposed on the track-changing path. When the trigger engagement member 43 interacts with one of the track-changing units 44 (referring to the first track-changing unit 441), the lifting unit 42 is forced to carry the rolling actuator 46 to press down the protective film 8, thereby achieving unidirectional rolling of the first side area of ​​the screen. When the trigger engagement member 43 interacts with another track-changing unit 44 (referring to the third track-changing unit 443), the lifting unit 42 is forced to carry the rolling actuator 46 to press down the protective film 8, thereby achieving unidirectional rolling of the second side area of ​​the screen.

[0040] In this embodiment, the rolling actuator 46 spans above the positioning mechanism 2. The rolling actuator 46 (such as a roller) can be mounted on a lifting part 42 with a trigger engagement 43 (such as a pulley). The trigger engagement 43 moves along the track-changing path (its extension direction is consistent with the horizontal path 11). The lifting part 42 is mounted vertically on a horizontal moving part 41 that can reciprocate along the horizontal path 11. The horizontal moving part 41 achieves horizontal reciprocating movement through a motor 6 and a gear rack pair 7. At the same time, the horizontal moving part 41 reciprocates along the horizontal path 11 through a roller 45. The track-changing path includes a high-position path 12 and a low-position path 13. The track-changing part 44 is movably disposed at the junction of the high-position path 12 and the low-position path 13. Each of the track-changing parts 44 has a first position and a second position. In the first position, the track-changing part 44 is flush with the high-position path 12. In the second position, the track-changing part 44 connects the high-position path 12 and the low-position path 13.

[0041] More specifically, four independent track-changing sections 44 (including a first track-changing section 441, a second track-changing section 442, a third track-changing section 443, and a fourth track-changing section 444) are provided on the track-changing path. At least the first track-changing section 441, the second track-changing section 442, the third track-changing section 443, and the fourth track-changing section 444 are connected between the high-position path 12 and the low-position path 13. Each track-changing section 44 is a rocker that can rotate around a pivot. The rocker is held in a horizontal position by a reset elastic member in its natural state, forming part of the high-position path 12, so that the rolling mechanism 4 can complete the actions of descending, low-position movement, rising, and high-position movement during the movement. When the trigger engagement member 43 presses against or pushes the track-changing section 44 on the track-changing path, it forces the attitude of the track-changing section 44 to change, thereby driving the rolling actuator 46 to generate a lifting displacement to achieve the pressing or lifting action.

[0042] This purely mechanical lifting control method avoids complex electronic control systems, improving system response speed and reliability. This purely mechanical control method tightly couples the pressing and lifting actions of the rolling actuator 46 with its horizontal movement stroke. Without additional sensors or complex control algorithms, precise action switching can be achieved at preset mechanical trigger positions, effectively solving the complexity of vertical motion control for the rolling actuator 46 and ensuring the stability and efficiency of the bonding process.

[0043] Specifically, after the film alignment mechanism drives the protective film 8 to automatically align with the screen, it drives the horizontal moving part 41 along the horizontal path 11 in the first direction (e.g., from...). Figure 9 The initial position shown is moved to the left. At this time, since the trigger mating part 43 is located on the high-position path 12, the lifting part 42 is in the raised position, and the rolling actuator 46 is not in contact with the protective film 8.

[0044] When the horizontal moving part 41 moves to the first mechanical trigger position, the trigger engagement part 43 on the lifting part 42 presses against the first track changing part 441, forcing the first track changing part 441 to tilt downwards around its axis of rotation (as shown in the image). Figure 9(As shown). This purely mechanical pressing action directly converts the horizontal movement of the trigger engagement 43 into a downward displacement along the inclined first track-changing section 441. The trigger engagement 43 rolls down the inclined surface of the first track-changing section 441, forcing the entire lifting section 42 to descend relative to the horizontal moving section 41, ultimately causing the rolling surface of the rolling actuator 46 to gently contact and press down the protective film 8 at the first pressing position in the first side (left) area of ​​the screen. After the rolling actuator 46 descends to the first pressing position, it continues to move horizontally in the first direction (the trigger engagement 43 travels along the low-position path 13). During this process, the rolling actuator 46 continues to move horizontally while maintaining the pressing state, completing the unidirectional rolling bonding from the first pressing position to the first side edge of the screen. This process unidirectionally and progressively rolls the protective film 8 between the first pressing position and the first side edge of the screen onto the screen. Because the pressing direction is unidirectional, the air under the protective film 8 is completely and smoothly pushed to the left edge of the screen and discharged, effectively avoiding the retention of air bubbles in the middle of the screen.

[0045] After the left side pressing is completed, the equipment enters the return pressing stage. The horizontal moving part 41 continues to move to the left, and the trigger engagement part 43 of the lifting part 42 contacts and lifts the second track changing part 442. When the second track changing part 442 is subjected to this pushing force, it rises upward, causing the trigger engagement part 43 to rise from the lower section path 13 through the inclined surface of the second track changing part 442 to the upper section path 12. The rolling actuator 46 is forcibly guided from the rolling state to the lifting state, so that it is removed from the protective film 8.

[0046] After completing the first side rolling and lifting, the rolling actuator 46 moves in a second direction (i.e., the return stroke) opposite to the first direction. The horizontal moving part 41, driven by the motor 6, begins to move in the second direction (i.e., to the right) (see reference). Figure 10 When the horizontal moving part 41 moves to the second mechanical trigger position to the right, similar to the above process, the trigger mating part 43 of the lifting part 42 presses against the third track changing part 443, causing it to tilt downwards and guiding the trigger mating part 43 down to the lower segment path 13 on the right. The rolling actuator 46 then presses down again, so that its rolling surface contacts the protective film 8 at a second pressing position in the area of ​​the second side (right side) of the screen. The horizontal moving part 41 continues to move to the right. At this time, the trigger mating part 43 has entered the lower segment path 13, and the rolling actuator 46 remains in the pressing state, continuously rolling to the right using the movement of the horizontal moving part 41. This process rolls the protective film 8 between the second pressing position and the second edge of the screen unidirectionally and progressively onto the screen. Since the pressing direction is unidirectional, the air under the protective film 8 is completely and smoothly pushed to the right edge of the screen and discharged, effectively avoiding the retention of air bubbles in the middle of the screen. After the pressing is completed, the trigger mating part 43 is reset to the initial high position at the end of the return stroke by lifting the fourth track changing part 444, thereby completing the entire bonding operation process and preparing for the next bonding.

[0047] In a preferred embodiment, the left and right clamping members 21 of the positioning mechanism 2 are integrated with a support part 31. When the electronic device 9 is fixed by the left and right clamping members 21, the support part 31 is automatically positioned above the left and right sides of the screen to support the left and right edges of the protective film 8.

[0048] In a preferred embodiment, the membrane alignment mechanism includes a left and right thrust module 32 and a front and rear thrust module 33 arranged opposite to each other. The left and right thrust module 32 is used to apply thrust to the protective membrane 8 supported on the bearing part 31 from the left and right sides, and the front and rear thrust module 33 is used to apply thrust to the protective membrane 8 from the front and rear ends.

[0049] In this embodiment, the left and right clamping members 21 are located on the left and right sides of the support platform 10 and can move towards / away from each other along the X-axis direction to clamp the mobile phone from the left and right sides. The support part 31 is located at the upper end of the left and right clamping members 21 and is an L-shaped component with its horizontal section extending inward to the top of the screen to support the left and right edges of the protective film 8. The left and right thrust modules 32 can move towards each other along the X-axis direction to apply thrust to the protective film 8 from the left and right sides. Preferably, the positioning mechanism 2 also includes front and rear clamping members 22, which are located on the front and rear sides of the support platform 10 and can move towards / away from each other along the Y-axis direction to clamp the mobile phone from the front and rear sides. The front and rear thrust modules 33 can move towards each other along the Y-axis direction to apply thrust to the protective film 8 from the front and rear sides.

[0050] The alignment process is as follows: First, place the phone on the support platform 10, then drive the left and right clamping parts 21 and the front and rear clamping parts 22 to move inwards until the clamping parts are close to the four sides of the phone, so that the phone is centered and fixed on the base. At this time, the phone screen is in a preset horizontal position, and the vertical geometric center line (X-direction center line) and the horizontal geometric center line (Y-direction center line) of the screen are basically coincident with the mechanical center line of the clamp.

[0051] The L-shaped support portion 31 at the upper end of the left and right clamping members 21 moves into place together with the clamping members. The horizontal section of the support portion 31 extends into the upper part of the screen by about 2-5mm, and the support portions 31 on the left and right sides are symmetrically distributed on both sides of the longitudinal center line of the screen. The upper surface of the support portion 31 is used to support the left and right edges of the protective film 8, and its height is 1-3mm higher than the screen surface, so that the protective film 8 placed laterally is suspended above the screen and does not contact the screen. The number of support portions 31 should ensure that the entire left and right edges of the protective film 8 are effectively supported. Next, the protective film 8 is placed into the device from above, so that the left and right edges of the protective film 8 fall on the upper surfaces of the left and right support portions 31 respectively. Since the support portion 31 only supports the left and right edges of the protective film 8, the middle area of ​​the protective film 8 is in a suspended state, with a gap between it and the screen surface. At this time, the protective film 8 can be freely translated along the X-axis (left and right direction) on the support portion 31, and can also be freely translated along the Y-axis (front and back direction) within a certain range.

[0052] Then, automatic vertical (X-direction) alignment is achieved through left and right thrust. Specifically, the left and right thrust modules 32 are driven to move towards each other, simultaneously contacting the left and right sides of the protective film 8 from both sides. The thrust applied by the left and right thrust modules 32 is equal or approximately equal in magnitude, forming a pair of symmetrical constraint forces. Since the protective film 8 is only supported by the bearing part 31 on the left and right sides, with its middle part suspended, the protective film 8 translates as a whole along the X-axis under the action of the symmetrical thrust. When there is a deviation between the vertical geometric center line of the protective film 8 and the vertical geometric center line of the screen, the thrust module closer to the center line contacts the edge of the film first, while the thrust module farther from the center line has not yet contacted or has a smaller contact force. The resulting torque difference automatically pushes the protective film 8 towards the center line until the two center lines coincide, at which point the contact forces of the left and right thrust modules 32 reach equilibrium. This process requires no visual assistance or manual intervention and is completely completed automatically by the geometric constraints of the mechanical structure, achieving automatic alignment of the vertical center line.

[0053] Finally, automatic lateral (Y-direction) alignment is achieved through the front and rear thrust modules 33. Specifically, the front and rear thrust modules 33 are driven to move towards each other, simultaneously contacting the front and rear edges of the protective film 8 from both sides. The thrust applied by the front and rear thrust modules 33 is equal or approximately equal in magnitude, forming another pair of symmetrical constraint forces. Similar to the principle of left and right alignment, under the action of the symmetrical thrust, the protective film 8 translates along the Y-axis, and its lateral geometric center line automatically approaches and eventually coincides with the lateral geometric center line of the screen. At this point, the protective film 8 is precisely aligned with the screen in both the X and Y directions. By integrating the support part 31 onto the left and right clamping members 21, when the electronic device 9 is positioned and fixed by the positioning mechanism 2, the support part 31 is automatically positioned above the left and right sides of the screen to support the left and right edges of the protective film 8. This integrated design allows the support part 31 to be in a ready state supporting the protective film 8 immediately after the electronic device 9 is fixed, without the need for additional driving or alignment steps. Furthermore, this design ensures a fixed relative position between the carrier 31 and the screen, eliminating the need for additional adjustments or calibration steps and effectively solving the positioning complexity and accuracy issues that might arise from independently setting up the carrier 31. This integrated structural design simplifies the overall structure of the alignment device, reduces errors caused by inaccurate relative positions of the carrier 31 and the phone during alignment, thereby improving the accuracy and stability of the protective film 8 alignment. In addition, since the position of the carrier 31 is determined when the phone is fixed, additional calibration or adjustment steps are eliminated, thus improving the efficiency and automation of the overall alignment operation.

[0054] In a preferred embodiment, the left and right thrust modules 32 are configured with a first force-applying part 321 and a second force-applying part 322 on the surface of the protective film 8. The first force-applying part 321 has a rigid contact surface, the second force-applying part 322 has an elastic contact surface, and the second force-applying part 322 is connected to an electronically controlled drive 323 to drive it to switch between the extended working position and the retracted avoidance position.

[0055] In a preferred embodiment, the front and rear thrust modules 33 are configured with a third force-applying part 331 and a fourth force-applying part 332 on the surface of the force-applying module 33 to apply thrust to the protective film 8. The third force-applying part 331 has a rigid contact surface, and the fourth force-applying part 332 has an elastic contact surface. The fourth force-applying part 332 is connected to an electronically controlled drive unit 323 to drive it to switch between an extended working position and a retracted avoidance position.

[0056] In this embodiment, considering that the protective film 8 has various material types, such as soft film, hard film, and glass film, different materials of protective film 8 may have different requirements for the contact method and force of the applied thrust. If a single force application method is used, it may lead to problems such as inaccurate alignment, film material damage, or low alignment efficiency. Therefore, in this embodiment, the left and right thrust modules 32 can switch to different force application parts according to the material type of the protective film 8, dynamically changing or adjusting the part of the thrust module that contacts the protective film 8. The force application part is the part of the thrust module that directly contacts the protective film 8, and its design should match the material characteristics of the protective film 8 to optimize the thrust transmission effect and avoid damage. In the above-mentioned automated bonding method, when the protective film 8 needs to be aligned, the left and right thrust modules 32 and / or the front and rear thrust modules 33 will automatically select or switch to the corresponding force application part according to the material type of the protective film 8 to be bonded. For example, for a softer or easily scratched protective film 8, the thrust module switches to a force application section with a soft contact surface or a larger contact area to distribute pressure and avoid damage to the film material. For a harder or less deformable protective film 8, it may switch to a force application section with a higher coefficient of friction or a more robust contact surface to ensure effective thrust transmission and achieve precise sliding alignment. In this way, the thrust module can provide customized thrust application methods for protective films 8 made of different materials, thereby ensuring alignment accuracy while effectively protecting the protective film 8 from damage and improving the stability and efficiency of the alignment process. In an optional embodiment, the system further includes a control unit and an operating interface electrically connected to the control unit. The operating interface has a first mode selection element and a second mode selection element. When the first mode selection element is selected, the electronically controlled drive unit 323 controls the second force-applying part 322 or the fourth force-applying part 332 to retract. When the second mode selection element is selected, the electronically controlled drive unit 323 controls the second force-applying part 322 or the fourth force-applying part 332 to extend. The operating interface can be a control panel with physical buttons and a display screen, allowing the user to select modes and confirm operations by pressing buttons and obtain feedback information through the display screen. Alternatively, the operating interface can be a touchscreen, allowing the user to select operating modes and control devices by touching virtual buttons or menu options on the screen, providing a more intuitive and convenient interactive experience. The first mode selection element is a specific input element on the operating interface used to trigger the device to enter a specific operating mode. When the user activates the selection element, the control unit receives the corresponding instruction and executes preset control logic. The first mode selection element can be a physical button or a virtual button or menu item displayed on the touchscreen, which the user activates by clicking or selecting. The second mode selection is similar to the first mode selection. When the user activates this selection, the control unit will receive the corresponding instruction and execute another set of preset control logic.The second mode selector can be a physical button, such as a button labeled "Elastic Alignment" or "Flexible Mode." It can also be a virtual button or menu item displayed on a touchscreen, which the user activates by clicking or selecting. When the first mode selector is selected, the control unit controls the membrane alignment mechanism to operate and retracts the second force-applying part 322. This control logic defines an operating mode that ensures the second force-applying part 322 or the fourth force-applying part 332 is in a retracted, abutment position during the alignment operation of the membrane alignment mechanism. This means that during alignment, the first force-applying part 321 or the third force-applying part 331 (with a rigid contact surface) primarily applies force to the protective membrane 8. This control can be achieved by the control unit sending a retraction command to the electronically controlled drive 323, for example, by controlling a cylinder via a solenoid valve or by driving a linkage mechanism via a motor 6, so that the second force-applying part 322 or the fourth force-applying part 332 is fully retracted, preventing its elastic contact surface from contacting the protective membrane 8. When the second mode selector is selected, the control unit controls the membrane alignment mechanism to operate and extends the second force-applying part 322 or the fourth force-applying part 332. This control logic defines another operating mode, in which the second force-applying part 322 or the fourth force-applying part 332 is in the extended working position when the membrane alignment mechanism is performing the centering operation. This means that during the centering process, the second force-applying part 322 or the fourth force-applying part 332 (with an elastic contact surface) will contact the protective membrane 8 and apply force. This control can be achieved by the control unit sending an extension command to the corresponding electronically controlled drive 323, so that the second force-applying part 322 or the fourth force-applying part 332 extends to the preset working position. Through the above technical solution, the left and right thrust modules 32 and / or the front and rear thrust modules 33 can flexibly switch the force-applying parts according to the different material types of the protective membrane 8, thereby avoiding problems such as damage to the protective membrane 8, inaccurate alignment, or low efficiency caused by improper force application. This allows the automated lamination method to adapt to a wider range of 8 types of protective films, improving the versatility and compatibility of the equipment, while ensuring the accuracy and stability of the alignment process, significantly improving the lamination yield and production efficiency.

[0057] Optionally, at the same time or after the rolling actuator 46 presses the protective film 8 down to the first pressing position or the second pressing position of the screen, a limiting mechanism 5 is controlled to extend between the screen of the electronic device 9 and the protective film 8 to prevent them from sticking together prematurely. The limiting mechanism 5 retracts before the protective film 8 sticks to the first side edge or the second side edge of the screen.

[0058] In this embodiment, the limiting mechanism 5 is a device used to prevent undesirable contact or adhesion between the protective film 8 and the screen during a specific operation phase. The limiting mechanism 5 can be a thin, physical baffle that can be inserted between the screen and the protective film 8 without damaging them. Alternatively, the limiting mechanism 5 can be a non-contact isolation device utilizing airflow or air cushion principles. By generating an upward airflow in a specific area, an air cushion is formed between the protective film 8 and the screen, preventing direct contact between them. The extension movement of the limiting mechanism 5 can be driven by a linear guide and a slider, with a stepper motor 6 or a servo motor 6 driving the limiting mechanism 5 to perform precise linear reciprocating motion, allowing it to be smoothly inserted into the gap between the screen and the protective film 8 from the side. Alternatively, a rotating mechanism, such as a linkage or cam mechanism driven by a rotary motor 6, can be used to make the limiting mechanism 5 swing or rotate along an arc path, thereby delivering the effective part of the limiting mechanism 5 between the screen and the protective film 8.

[0059] While or after the rolling actuator 46 presses the protective film 8 down to the first or second pressing position of the screen, the control limiting mechanism 5 extends between the screen of the electronic device 9 and the protective film 8, forming a temporary isolation layer between the protective film 8 and the screen. This isolation layer effectively prevents the protective film 8 from prematurely adhering to the screen in areas where the rolling actuator 46 has not yet rolled, ensuring that the remaining portion of the protective film 8 maintains a gap with the screen before the rolling actuator 46 begins unidirectional rolling. Subsequently, when the rolling actuator 46 begins unidirectional rolling and adhering in the first or second direction, the limiting mechanism 5 continues to function, allowing only the protective film 8 in the area where the rolling actuator 46 operates to contact and adhere to the screen. As the rolling actuator 46 gradually rolls the protective film 8 from the pressing position to the first or second edge of the screen, the limiting mechanism 5 retracts promptly and precisely before the protective film 8 is fully adhered to the corresponding edge. This dynamic isolation and retraction mechanism ensures that the bonding process of the protective film 8 remains under control, preventing the generation of air bubbles and uneven adhesion from the initial pressing to the final edge bonding. In this way, the rolling actuator 46 can focus on its rolling function, while the limiting mechanism 5 provides dynamic, removable support and isolation, together achieving high-precision automated bonding.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the invention without departing from the principles and spirit of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A film application device, characterized in that, include: Positioning mechanisms are used to fix electronic equipment. The film alignment mechanism is used to drive the protective film to automatically align with the screen; The rolling mechanism includes a horizontally movable part that can reciprocate along a horizontal path, a lifting part that is vertically and vertically disposed on the horizontally movable part, a rolling actuator mounted on the lifting part, at least two guide-changing parts for causing the lifting part to generate a vertical displacement relative to the horizontally movable part, and a trigger engagement member that mechanically interacts with the guide-changing parts. The trigger engagement member is mounted on the lifting part and configured to move along a guide-changing path, the guide-changing path including a high-position path and a low-position path, and the guide-changing part is movably disposed at the junction of the high-position path and the low-position path. The track-changing part has a first position and a second position. In the first position, the track-changing part is aligned with the high-level path. In the second position, the track-changing part connects the high-level path and the low-level path. When the triggering component interacts with one of the track-changing parts, the lifting part is forced to carry the rolling actuator and press down the protective film to achieve unidirectional rolling of the first side area of ​​the screen. When the triggering component interacts with another track-changing part, the lifting part is forced to carry the rolling actuator and press down the protective film to achieve unidirectional rolling of the second side area of ​​the screen.

2. The film application device according to claim 1, characterized in that, The positioning mechanism has a support portion integrated on its left and right clamping parts. When the electronic device is fixed by the left and right clamping parts, the support portion is automatically positioned above the left and right sides of the screen to support the left and right edges of the protective film.

3. The film application device according to claim 2, characterized in that, The membrane alignment mechanism includes a left and right thrust module and a front and rear thrust module arranged opposite to each other. The left and right thrust module is used to apply thrust to the protective membrane supported on the bearing part from the left and right sides, and the front and rear thrust module is used to apply thrust to the protective membrane from the front and rear ends.

4. The film application device according to claim 3, characterized in that, The left and right thrust modules are configured with a first force-applying part and a second force-applying part on the surface that applies thrust to the protective film; the first force-applying part has a rigid contact surface, the second force-applying part has an elastic contact surface, and the second force-applying part is connected to an electronically controlled drive component to drive it to switch between an extended working position and a retracted avoidance position.

5. The film application device according to claim 3, characterized in that, The front and rear thrust modules are configured with a third force-applying part and a fourth force-applying part on the surface that applies thrust to the protective film. The third force-applying part has a rigid contact surface, and the fourth force-applying part has an elastic contact surface. The fourth force-applying part is connected to an electronically controlled drive unit to drive it to switch between an extended working position and a retracted avoidance position.

6. An automated method for applying a screen protector using the screen protector application equipment according to any one of claims 1-5, characterized in that, Includes the following steps: Position and fix the electronic device to be coated; The protective film is placed on a support portion suspended above the screen on the left and right sides. A film alignment mechanism is controlled to apply a pushing force to the protective film from the left and right sides and the front and back sides, so that the protective film and the screen are aligned to a preset center. After alignment is completed, control a rolling mechanism to perform the following actions: Drive the rolling mechanism to move along the first direction, press the protective film down to the first pressing position of the screen at the first mechanical trigger position, and then continue to move horizontally along the first direction to roll the protective film between the first pressing position and the first side edge of the screen in one direction to adhere it to the screen. The rolling mechanism is driven to move along a second direction opposite to the first direction, and at the second mechanical trigger position, the protective film is pressed down to the second pressing position of the screen. Then, it continues to move horizontally along the second direction to roll the protective film between the second pressing position and the second side edge of the screen in one direction to adhere it to the screen.

7. The automated bonding method according to claim 6, characterized in that, First, the protective film is subjected to symmetrical constraint thrust from the left and right directions by the left and right thrust modules, which forces the longitudinal geometric center line of the protective film to move closer to the longitudinal geometric center line of the screen until they coincide.

8. The automated bonding method according to claim 7, characterized in that, The protective film is subjected to opposing thrusts from the front and rear directions by the front and rear thrust modules, so that the horizontal geometric center line of the protective film is automatically aligned with the horizontal geometric center line of the screen.

9. The automated bonding method according to claim 6, characterized in that, Both the first pressing position and the second pressing position are offset from the horizontal geometric center line of the screen. The first pressing position and the second pressing position are configured such that the pressing area formed by the two unidirectional rolling presses has an overlapping area in the middle of the screen.

Images