Protective film and method for aligning a protective film with a screen of a mobile phone and automatic mobile phone film applying machine

Abstract

This invention relates to a method for aligning a protective film with a mobile phone screen and an automatic mobile phone screen protector applicator. The applicator includes a mobile phone clamping and positioning device, a first conveying device for moving the clamping and positioning device, a film positioning device for positioning the film, an applicator fixture, a third conveying device for moving the applicator fixture, a release paper peeling device, and a roller bonding assembly. By acquiring mobile phone size data and protective film size data corresponding to the phone model, and combining this with pre-stored initial coordinate parameters, the target position coordinates of the clamping and positioning device, the film positioning device, and the applicator fixture are calculated and linked for coordinated control. This enables automatic alignment between the center of the mobile phone screen and the center of the protective film, followed by application and roller bonding. This solves the problems of existing alignment methods relying on manual experience, unstable alignment accuracy, and low changeover efficiency, improving the consistency of screen protector alignment and the yield rate.

Description

Technical Field

[0001] This invention relates to a method for aligning a protective film with a mobile phone screen and an automatic mobile phone screen protector applicator. Background Technology

[0002] Existing automated screen protector application equipment for mobile phones typically relies on manual experience, visual calibration, or multiple trial applications for adaptation to different phone models and screen protector alignment. This makes it difficult to balance efficiency and consistency, and at least the following technical problems exist: (1) The alignment of the screen protector relies heavily on manual visual inspection or experience. The relative position error between the mobile phone screen and the screen protector is difficult to control stably, which can easily lead to problems such as misalignment, obstruction, and exposed edges, resulting in large fluctuations in yield. (2) Different models of mobile phones and screen protectors have large size differences. The existing solutions are not universal enough. When changing models, it is necessary to recalibrate or adjust parameters, which results in long adjustment time and high maintenance costs. (3) The lack of a unified coordinate reference and alignment target definition, and the unclear coordinate conversion relationship between the various actuators of the equipment, are prone to cumulative errors and alignment drift; (4) When the alignment control strategy is complex or relies on real-time feedback from sensors, the algorithm and hardware costs are high, and it is sensitive to the field environment (light, reflection, etc.) and has insufficient stability. (5) The lack of repeatable pose control logic between each step of the film application process (absorption-peeling-alignment-attachment-rolling) leads to changes in the film's pose and increased transfer error after peeling. (6) When the motion axis of the actuator is not properly allocated, there is more motion coupling, more complex control, slower cycle time, and it is difficult to guarantee the repeatability of positioning accuracy; (7) If reliable center alignment cannot be achieved before bonding, wrinkles, uneven stress, or poor subsequent rolling and de-bubbling effect are likely to occur at the moment of bonding, resulting in an increased defect rate. (8) If the whole system lacks coordinated control with units such as cleaning, dust blowing, positive and negative pressure air sources, the cleaning and adsorption / release state before film application will be unstable, further amplifying film application defects and consistency problems. Summary of the Invention

[0003] To address the aforementioned technical problems or one of them, the primary objective of this invention is to provide a method for aligning a protective film with a mobile phone screen. This method acquires mobile phone size data and protective film size data corresponding to the phone model, and combines this with the initial coordinate parameters pre-stored in the film application device to calculate the target position coordinates of the mobile phone clamping positioning device, the film positioning device, and the film application fixture. This achieves automatic alignment between the center of the mobile phone screen and the center of the protective film, thereby reducing the cost of model change calibration and improving the consistency of film alignment.

[0004] To address the aforementioned technical problems or one of them, a second objective of this invention is to provide an automatic mobile phone screen protector applicator, which implements the aforementioned screen protector alignment method and combines mechanisms for film picking, film positioning, release paper peeling, application, and rolling bonding to achieve automation and coordinated control of the entire screen protector application process, thereby improving application efficiency and yield. Simultaneously, it can be used with a cleaning device, a dust blowing nozzle, and a positive and negative pressure air source device to improve the cleanliness and adsorption / release stability before application.

[0005] The first objective of this invention is achieved as follows: A method for aligning a protective film with a mobile phone screen, applied to a screen protector application device, the screen protector application device including a mobile phone clamping and positioning device, a first conveying device for moving the mobile phone clamping and positioning device, a film positioning device for positioning the film, a screen protector clamp, a third conveying device for moving the screen protector clamp, a release paper peeling device, and a roller bonding assembly, the method including the following steps: Step S1: Obtain the model information of the mobile phone to be screen protectored, and retrieve the mobile phone size data and screen protector size data corresponding to the model; Step S2: Place the mobile phone into the mobile phone clamping and positioning device and clamp and position it; place the film containing the mutually attached protective film and release paper into the film positioning device and complete the film positioning; Step S3: The third transfer device drives the film-applying clamp to pick up the positioned film at the film positioning device, and drives the film-applying clamp to move to the release paper peeling device to peel off the release paper; S4: Based on the mobile phone size data, the protective film size data, and the pre-stored initial coordinate parameters of the film application device, calculate the target position coordinates of the mobile phone clamping and positioning device, the film positioning device, and the film application fixture, and control the first transfer device, the film positioning device, and the third transfer device to move according to the target position coordinates so that the center of the mobile phone screen is aligned with the center of the protective film; Step S5: After center alignment, move the film applicator and the mobile phone clamping and positioning device relative to each other in the bonding direction so that the protective film is attached to the mobile phone screen; Step S6: The rolling bonding component and the protective film attached to the mobile phone screen are subjected to relative rolling motion to roll bond the protective film.

[0006] By acquiring the phone size data and protective film size data corresponding to the model, and combining the initial coordinate parameters pre-stored in the film application equipment, the target position coordinates of the phone clamping positioning device, the film positioning device, and the film application fixture are calculated and linked for control, so that the center of the phone screen and the center of the protective film are automatically aligned, and then the application and rolling bonding are completed. This solves the problems of existing alignment relying on manual experience, unstable alignment accuracy, and low changeover efficiency, and improves the consistency of film application alignment and the yield rate of film application.

[0007] The primary objective of this invention can also be achieved using the following technical measures: Furthermore, the predetermined reference point at the upper right corner of the clamping cavity of the mobile phone clamping and positioning device is used as the mobile phone positioning reference origin, the predetermined reference point at the upper right corner of the positioning area of ​​the film positioning device is used as the film positioning reference origin, and the alignment target is the coincidence of the center of the mobile phone screen and the center of the protective film.

[0008] By selecting the upper right corner of the clamping cavity of the mobile phone clamping positioning device and the upper right corner of the positioning area of ​​the film positioning device as the origin of the coordinate reference, and taking "the center of the screen and the center of the protective film coincide" as the alignment target, the alignment reference and alignment target are standardized and repeatable, thereby solving the problems of unclear coordinate conversion, error accumulation and alignment drift caused by the lack of a unified coordinate reference, and improving the repeatability and stability of multi-mechanism collaborative alignment.

[0009] Furthermore, the pre-stored initial coordinate parameters include constants 1 to 5; constant 1 is the initial coordinate of the mobile phone clamping and positioning device in the X direction; constant 2 is the initial coordinate of the film positioning device in the X direction; constants 3 and 4 are the first and second initial coordinates of the film clamp in the Y direction, respectively; and constant 5 is the initial coordinate of the mobile phone clamping and positioning device in the Y direction.

[0010] The pre-stored initial coordinate parameters of the screen protector application device are abstracted into constants 1 to 5, which correspond to the initial coordinate references of the mobile phone clamping and positioning device, the film positioning device, and the screen protector application fixture, respectively. This decouples the size variable (mobile phone / screen protector size) from the inherent reference of the device (initial coordinate constants), thereby solving the problems of frequent recalibration and chaotic parameter management required for existing model changes, and realizing modularization and rapid configuration of alignment calculation.

[0011] Furthermore, the target coordinate in the X direction of the mobile phone clamping and positioning device satisfies: X = mobile phone width / 2 + constant 1.

[0012] The target coordinates in the X direction of the mobile phone clamping and positioning device are limited to satisfy "X = mobile phone width / 2 + constant 1". This allows the mobile phone to be controlled by the "center of the mobile phone width" in the X direction and directly mapped to the device coordinates. The calculation logic is simple and reusable, thereby solving the problems of low efficiency and insufficient stability caused by complex conversion or reliance on visual feedback in the existing X-direction alignment. This improves the determinism and execution efficiency of X-direction alignment calculation.

[0013] Furthermore, the target coordinate in the Y direction of the mobile phone clamping and positioning device satisfies: Y = (mobile phone length - protective film length) / 2 + constant 5.

[0014] The target coordinates in the Y direction of the mobile phone clamping and positioning device are limited to satisfy "Y = (mobile phone length - protective film length) / 2 + constant 5". The longitudinal compensation relationship for center alignment is established by the difference between the length of the mobile phone and the length of the protective film, so that the center of the alignment target can still be kept coincident under different length specifications. This solves the problem of random changes in longitudinal alignment and the need for repeated trial application and correction, and improves the adaptability of the model and the consistency of longitudinal alignment.

[0015] Furthermore, the target coordinates in the X direction of the diaphragm positioning device satisfy: X = protective film width / 2 + constant 2.

[0016] The target coordinates in the Y direction of the mobile phone clamping and positioning device are limited to satisfy "Y = (mobile phone length - protective film length) / 2 + constant 5". The longitudinal compensation relationship for center alignment is established by the difference between the length of the mobile phone and the length of the protective film, so that the center of the alignment target can still be kept coincident under different length specifications. This solves the problem of random changes in longitudinal alignment and the need for repeated trial application and correction, and improves the adaptability of the model and the consistency of longitudinal alignment.

[0017] Furthermore, the target coordinate in the Y direction of the film-applying fixture when picking up the film satisfies: Y = - length of protective film + constant 3.

[0018] The target coordinate of the Y direction of the film-applying fixture when picking up the film is limited to "Y = -protective film length + constant 3". This gives the film-applying fixture a clear target position related to the protective film length during the film-picking action, which can reduce the deviation of the picking position caused by the change of film length. This solves the problem that the existing film picking position needs to be manually adjusted according to the specifications and the picking stability is poor, thus improving the versatility and reliability of the picking stage.

[0019] Furthermore, the target Y-axis coordinate of the film-applying fixture when performing peeling at the release paper peeling device satisfies: Y = -protective film length + constant 4.

[0020] The target Y-axis coordinate of the film-applying fixture when performing peeling at the release paper peeling device is limited to "Y = -protective film length + constant 4". This ensures that the position of the peeling station is also determined by the length of the protective film, guaranteeing that the attitude and feed amount of the film are consistent when it enters the peeling position. This solves the problem of peeling failure, stretching deformation or attitude disturbance caused by inaccurate peeling position in the existing system, improves the stability of the release paper peeling process and reduces interference with subsequent alignment.

[0021] Further, in step S4, the first transfer device drives the mobile phone clamping and positioning device to move along the X-axis and Y-axis, the film positioning device moves along the X-axis, and the third transfer device drives the film-applying fixture to move along the Y-axis and Z-axis.

[0022] The first transfer device drives the mobile phone clamping and positioning device to move along X and Y, the film positioning device to move along X, and the third transfer device drives the film-applying fixture to move along Y and Z. This makes the alignment motion clear in its responsibilities on each axis and reduces coupling, which helps to simplify the control strategy, shorten the cycle time and improve the accuracy of repeated positioning. This solves the problems of complex control, slow cycle time and poor consistency caused by existing multi-axis coupling, and improves the overall coordination efficiency and stability of the machine.

[0023] The second objective of this invention is achieved as follows: An automatic mobile phone screen protector applicator is provided for implementing the aforementioned method of aligning the protective film with the mobile phone screen. The applicator includes a cabinet; the cabinet has a mobile phone loading / unloading port; the cabinet contains a cleaning station and a screen protector applicator, the screen protector applicator having a dust-blowing nozzle; the cabinet also includes a cleaning device, a film storage box and a shelf for carrying the film storage box, a film-retrieving clamp and a second transfer device for driving the film-retrieving clamp, and a positive and negative pressure air source device; wherein, the film storage box stores films containing mutually adhered protective films and release paper; the second transfer device drives the film-retrieving clamp to move between the shelf and the film positioning device to release the film to the film positioning device for positioning; the positive and negative pressure air source device is connected to the cleaning device, the film-retrieving clamp, the screen protector applicator, and / or the dust-blowing nozzle to selectively provide positive or negative pressure.

[0024] By integrating the film picking, film positioning, release paper peeling, application, and rolling bonding mechanisms into the cabinet, and configuring a cleaning station, dust blowing nozzles, and positive and negative pressure air source devices, the film alignment method can form a closed-loop process in the whole machine: the film can be stably picked up, placed, and positioned; after peeling, it can be aligned and applied according to the target coordinates and rolled. At the same time, the cleaning / dust blowing and positive / negative pressure switching improve the cleanliness before film application and the reliability of adsorption / release, thereby solving the problems of poor film application consistency and high defect rate caused by insufficient coordination of existing systems, and realizing automated and high-yield film application operations.

[0025] The beneficial effects of this invention are as follows: (1) Based on the mobile phone size data and the protective film size data and combined with the pre-stored initial coordinate parameters, the target position coordinates of multiple mechanisms are directly calculated to achieve automatic alignment between the center of the screen and the center of the protective film, which significantly reduces manual dependence and improves alignment consistency.

[0026] (2) Establish a unified coordinate origin by pre-defined reference points, and use constant 1 to constant 5 to parameterize the inherent initial coordinates of the equipment, so that the changeover and adaptation are faster, the calibration workload is smaller, and the parameters are more maintainable.

[0027] (3) The suction position, peeling position and alignment position are uniformly incorporated into the coordinate calculation framework to reduce the impact of posture disturbance after peeling on alignment, improve the stability of the film transfer and attachment process, and reduce the risk of poor adhesion, wrinkles and poor defoaming.

[0028] (4) By optimizing the motion axis distribution of the first transfer device, the film positioning device and the third transfer device, motion coupling is reduced and the cycle time and repeatability are improved; at the same time, the whole machine is equipped with cleaning, dust blowing and positive and negative pressure air source switching to improve the cleanliness before film application and the reliability of adsorption / release, thereby improving the film application yield and consistency from the system level. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an automatic screen protector applicator for mobile phones.

[0030] Figure 2 This is a schematic diagram of an automatic screen protector applicator for mobile phones (excluding the cabinet door).

[0031] Figure 3 A schematic diagram of placing a mobile phone into a mobile phone clamping and positioning device.

[0032] Figure 4 This is a schematic diagram of a cleaning device cleaning a mobile phone.

[0033] Figure 5 A schematic diagram of a mobile phone clamping and positioning device clamping a mobile phone.

[0034] Figure 6 A schematic diagram showing the separation of the mobile phone and the mobile phone clamping and positioning device.

[0035] Figure 7 A cross-sectional view of a mobile phone clamping and positioning device.

[0036] Figure 8 This is a schematic diagram of the cleaning device.

[0037] Figure 9 This is a schematic diagram of the cleaning device from another angle.

[0038] Figure 10A schematic diagram showing the preparation of the membrane retrieval fixture.

[0039] Figure 11 This is a schematic diagram of a membrane-retrieving clamp picking up a membrane sheet.

[0040] Figure 12 This is a schematic diagram of the membrane retrieval fixture (in preparation for membrane retrieval).

[0041] Figure 13 This is a schematic diagram of the membrane retrieval fixture (with the membrane being retrieved).

[0042] Figure 14 This is a schematic diagram of the transport membrane of the membrane retrieval clamp.

[0043] Figure 15 This is a schematic diagram showing the separated state of the membrane, membrane storage box, and shelf.

[0044] Figure 16 This is a schematic diagram of a membrane storage box.

[0045] Figure 17 This is a schematic diagram of the membrane storage box from another angle.

[0046] Figure 18 A schematic diagram showing the membrane leaving the membrane positioning device, which is used for membrane clamping.

[0047] Figure 19 A schematic diagram of a diaphragm positioning device clamping a diaphragm.

[0048] Figure 20 This is a cross-sectional view of the diaphragm positioning device.

[0049] Figure 21 Another sectional view of the diaphragm positioning device.

[0050] Figure 22 This is a schematic diagram of a release paper peeling device peeling off the release paper.

[0051] Figure 23 This is a schematic diagram of the release paper peeling device (release paper peeling state).

[0052] Figure 24 This is a schematic diagram of the combination of the film-applying fixture and the third transfer device.

[0053] Figure 25 A schematic diagram showing the rolling bonding assembly pressing against and rolling the protective film to complete the film application.

[0054] Figure 26 This is a schematic diagram of the film-applying clamp using a suction cup to firmly hold the protective film in place.

[0055] Figure 27 This is a schematic diagram of the gas circuit operation of the positive and negative pressure gas source device. Detailed Implementation

[0056] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1, combined with Figures 1 to 27 As shown, an automatic mobile phone screen protector applicator includes a cabinet 1 with a mobile phone loading / unloading port 2 and a shielding door 3 at the port 2. When the shielding door 3 is open, it allows users to load and unload mobile phones through the port 2. When the shielding door 3 is closed, it prevents users from putting their hands inside the cabinet 1, thus improving operational safety. The cabinet 1 contains a cleaning station and a screen protector application station. The screen protector application station is equipped with a dust-blowing nozzle 6, which is used to blow dust off the mobile phone screen before applying the screen protector.

[0057] The cabinet 1 integrates the following functional components: a mobile phone clamping and positioning device 7, a first transfer device 8 for driving the mobile phone clamping and positioning device 7 to move, a cleaning device 9 set in the cleaning station, a film storage box 10 and a shelf 11 for carrying the film storage box 10, a film retrieval clamp 12 and a second transfer device 13 for driving the film retrieval clamp 12 to move, a film positioning device 14, a film application clamp 15 and a third transfer device 16 for driving the film application clamp 15 to move, a release paper peeling device 17, a roller bonding assembly 18, and a positive and negative pressure air source device 19.

[0058] (a) Mobile phone clamping and positioning device Furthermore, the mobile phone clamping and positioning device 7 includes a carrier 71, a horizontal clamping plate 73, a vertical clamping plate 74, a horizontal clamping drive mechanism 75, and a vertical clamping drive mechanism 76. The carrier 71 is provided with a clamping cavity 72 for accommodating the mobile phone; the horizontal clamping plate 73 is slidably disposed on the horizontal side wall of the clamping cavity 72, and the vertical clamping plate 74 is slidably disposed on the vertical side wall of the clamping cavity 72, thereby achieving adaptive clamping and positioning for mobile phones of different sizes.

[0059] Further, the lateral clamping drive mechanism 75 includes, for example, a first guide rail 751, a first slider 752, a second slider 753, a drive motor 754, and a swing arm 755. The first guide rail 751 is disposed in the inner cavity of the carrier 71; the first slider 752 and the second slider 753 are slidably disposed along the first guide rail 751. One end of the swing arm 755 is fixedly connected to the output shaft of the drive motor 754, and the other end of the swing arm 755 is connected to the second slider 753 in a transmission connection; when the drive motor 754 drives the swing arm 755 to rotate, it drives the second slider 753 to move along the first guide rail 751, and further drives the first slider 752 to move along the first guide rail 751; the first slider 752 is connected to the lateral clamping plate 73 to drive the lateral clamping plate 73 to slide, thereby realizing lateral clamping and positioning.

[0060] Furthermore, the longitudinal clamping drive mechanism 76 may have the same or similar structure and transmission relationship as the transverse clamping drive mechanism 75, and its first slider is connected to the longitudinal clamping plate 74 to achieve longitudinal clamping positioning.

[0061] Optionally, the second slider 753 is provided with a guide groove 7531; the end of the swing arm 755 away from the output shaft of the drive motor 754 is provided with a positioning protrusion 7551, which is placed in the guide groove 7531. When the drive motor 754 drives the swing arm 755 to rotate, the positioning protrusion 7551 moves along the guide groove 7531 to push the second slider 753 to move.

[0062] Optionally, the first slider 752 is provided with a countersunk hole 7521 and a through hole 7522 that are interconnected, and a connecting pin 7523 is provided that passes through the countersunk hole 7521 and the through hole 7522 in sequence and is connected to the second slider 753, so that the first slider 752 and the second slider 753 are interconnected. A first elastic element 7524 (e.g., a spring) may be provided in the countersunk hole 7521 and sleeved on the connecting pin 7523, thereby applying a restoring elastic force to the first slider 752.

[0063] Optionally, a limit switch 77 is also provided in the clamping cavity 72 to detect whether the mobile phone has entered the clamping cavity 72 and provide an entry / exit detection signal.

[0064] (ii) First transfer device Furthermore, the first transfer device 8 is used to drive the mobile phone clamping and positioning device 7 to move between the cleaning station and the film application station. The first transfer device 8 can be implemented using a linear module, a lead screw slide, a synchronous belt module, or an industrial robot, and can achieve displacement control in the X-axis and / or Y-axis directions according to the film application alignment requirements, so as to provide posture adjustment capability for film application alignment and bonding.

[0065] (iii) Cleaning device Furthermore, the cleaning device 9 includes a mounting plate 91, a cleaning fluid spraying assembly 92, a brushing assembly 93, and a non-woven fabric wiping assembly 94. The cleaning fluid spraying assembly 92 is mounted on the mounting plate 91 and is used to spray cleaning fluid onto the mobile phone screen, for example, it includes a nozzle 921.

[0066] The washing assembly 93 is mounted on the mounting plate 91 and is used to wash the mobile phone screen. For example, the washing assembly 93 includes a washing roller 931 and a first drive motor 932. The first drive motor 932 is connected to the washing roller 931 to drive the washing roller 931 to rotate.

[0067] The nonwoven fabric wiping assembly 94 is mounted on the mounting plate 91, and includes, for example, a nonwoven fabric unwinding roller 941, a nonwoven fabric take-up roller 942, and a transmission mechanism 943 for driving the nonwoven fabric. After the nonwoven fabric is drawn out from the nonwoven fabric unwinding roller 941, it forms a nonwoven fabric wiping surface on the mounting plate 91, and finally winds onto the nonwoven fabric take-up roller 942 to achieve wiping and drying of the mobile phone screen.

[0068] Further, the transmission mechanism 943 includes a second drive motor 9431, a drive roller 9432, and a first pressure roller 9433. The drive roller 9432 is sleeved on the output shaft of the second drive motor 9431; the first pressure roller 9433 is located above the drive roller 9432; a clamping and conveying area is formed between the two for clamping and conveying the nonwoven fabric. Optionally, a second pressure roller 9434 is also provided, so that the nonwoven fabric passes sequentially around the second pressure roller 9434 and the clamping and conveying area and is wound onto the nonwoven fabric take-up roller 942, and the nonwoven fabric forms the nonwoven fabric wiping surface at the second pressure roller 9434.

[0069] Optionally, the transmission mechanism 943 further includes a transmission belt 9435, which is sleeved between the nonwoven fabric take-up roller 942 and the output shaft of the second drive motor 9431 to drive the take-up roller to recycle the used nonwoven fabric.

[0070] In terms of arrangement, the cleaning liquid spraying component 92, the brushing component 93, and the non-woven cloth wiping surface are arranged sequentially along the movement direction of the mobile phone relative to the cleaning device 9, thereby realizing a continuous cleaning process of "spraying - brushing - wiping".

[0071] (iv) Membrane storage box and shelf Furthermore, the film storage box 10 is used to store the film 200, the film 200 includes a protective film 201 and a release paper 202 attached to each other, and the film storage box 10 includes a box body 101; the box body 101 has an open top and a lateral opening on the side wall, the open top and the lateral opening communicate with each other and together form a film retrieval port 102, so that the film retrieval clamp 12 can extend into the inner cavity of the box body 101 to pick up the film 200.

[0072] Furthermore, the bottom of the housing 101 is provided with a first positioning post 103, a second positioning post 104, and a third positioning post 105, as well as multiple exhaust ports 106. The first positioning post 103 is located near the front end of the bottom of the housing 101; the second positioning post 104 and the third positioning post 105 are located near the rear end of the bottom of the housing 101, and are symmetrically arranged with respect to the longitudinal centerline of the housing 101. The exhaust ports 106 are spaced apart along the length of the bottom of the housing 101 to reduce gas damping within the housing and improve membrane extraction stability when the membrane 200 is sucked in or released. Optionally, the inner sidewall of the housing 101 is provided with multiple vertical reinforcing ribs 107, and the inner bottom wall is provided with multiple transverse reinforcing ribs 108 to enhance structural strength.

[0073] Furthermore, the shelf 11 is provided with multiple storage layers 111; each storage layer 111 is provided with multiple placement positions 112 for membrane 200 storage boxes. The bottom of each placement position 112 is provided with a first positioning hole 113, a second positioning hole 114, and a third positioning hole 115 corresponding to the first positioning post 103, the second positioning post 104, and the third positioning post 105, respectively. When the membrane storage box 10 is placed in the placement position 112, each positioning post is inserted into its corresponding positioning hole, thereby achieving rapid and error-proof positioning of the membrane storage box 10 on the shelf 11.

[0074] Optionally, the height of the storage layer 111 is greater than the height of the membrane storage box 10, so as to ensure that the membrane retrieval clamp 12 has sufficient space when it extends into the membrane retrieval port 102 to retrieve the membrane.

[0075] (v) Film-removing clamp and second transfer device Further, the membrane retrieval fixture 12 is used to pick up the membrane 200 from the membrane storage box 10 and release the membrane 200 to the membrane positioning device 14. The membrane retrieval fixture 12 includes a substrate 121, a telescopic drive assembly 122, a sliding assembly 124, and a diffuse reflection photoelectric sensor 125. A linear guide rail 123 is provided along the length direction on the lower surface of the substrate 121; the telescopic drive assembly 122 includes, for example, a drive motor 1221, a drive wheel 1222, a driven wheel 1223, and a transmission belt 1224. The drive motor 1221 is mounted on the substrate 121, and its output shaft extends out of the substrate 121 and is connected to the drive wheel 1222. The driven wheel 1223 is mounted on the lower surface of the substrate 121, and the transmission belt 1224 is sleeved on the drive wheel 1222 and the driven wheel 1223. The sliding assembly 124 is slidably disposed on the linear guide rail 123 and is provided with a clamping member 1241 (e.g., a clamping piece) that is clamped and connected to the transmission belt 1224, so that when the drive motor 1221 drives the transmission belt 1224 to move, the sliding assembly 124 is driven to reciprocate along the linear guide rail 123.

[0076] Further, the sliding assembly 124 includes an upper slide seat 1242, a lower slide seat 1243, and a film-adsorption plate 1244 disposed on the lower slide seat 1243; the lower slide seat 1243 is movable up and down relative to the upper slide seat 1242. An avoidance notch 1211 is provided near the front end of the substrate 121. The sliding assembly 124 is provided with a first guide structure, for example including a first guide hole 1246 opened in the upper slide seat 1242, and a first guide rod 1247 disposed in the lower slide seat 1243 and passing through the first guide hole 1246; a first limiting block 1248 is provided on the outer periphery of the first guide rod 1247. When the first guide rod 1247 is located in the non-notch area, the first guide rod 1247 abuts against the substrate 121 to limit the rise of the sliding seat 1243; when the sliding assembly 124 moves to a position where the first guide rod 1247 is aligned with the clearance notch 1211, the first guide rod 1247 enters the clearance notch 1211, thereby allowing the sliding seat 1243 to rise relative to the upper sliding seat 1242 to perform the film taking action; the first limiting block 1248 abuts against the upper sliding seat 1242 to limit the relative upward stroke of the sliding seat 1243.

[0077] Furthermore, the sliding assembly 124 also includes a second guide structure, which includes a second guide hole opened in the upper slide seat 1242 and a second guide rod 1256 disposed in the lower slide seat 1243 and passing through the second guide hole. The end of the second guide rod 1256 is provided with a limiting baffle 1257, and the second guide rod 1256 is provided with a second limiting block 1258. The second limiting block 1258 cooperates with the limiting baffle 1257 to limit the common upward stroke of the upper slide seat 1242 and the lower slide seat 1243.

[0078] Furthermore, the diffuse reflection photoelectric sensor 125 is mounted on the substrate 121, with the sensing end of the diffuse reflection photoelectric sensor 125 facing outward from the substrate 121, and the diffuse reflection photoelectric sensor 125 is set with an action distance threshold. A reflector plate 1251 is provided on the side wall of the sliding seat 1242. When the sliding seat 1242 rises, the reflector plate 1251 rises synchronously with the sliding seat 1242 and enters the action distance threshold range of the diffuse reflection photoelectric sensor 125. The light signal emitted by the diffuse reflection photoelectric sensor 125 is reflected back to the diffuse reflection photoelectric sensor 125 after being reflected by the reflector plate 1251, thereby causing the diffuse reflection photoelectric sensor 125 to output a trigger signal, so that the diffuse reflection photoelectric sensor 125 can be used to detect the distance between the upper sliding seat 1242 and the diffuse reflection photoelectric sensor 125.

[0079] When the sliding assembly 124 is in the raised state and the distance between the upper slide block 1242 and the sensor meets the threshold condition, a trigger signal is output as the detection basis for the film-taking fixture 12 to complete the raising or positioning.

[0080] Furthermore, at least one membrane suction cup 126 is provided on the lower surface of the membrane suction plate 1244; a negative pressure air passage communicating with the membrane suction cup 126 is provided inside the membrane suction plate 1244, and a negative pressure connector 128 is provided in the negative pressure air passage. The membrane clamp 12 is also provided with a positive pressure jet connector 129; the positive pressure jet connector 129 has an air inlet end and an air outlet end, is fixedly installed on the membrane suction plate 1244 and is provided near the end of the membrane suction plate 1244, and the air outlet end exhausts air downwards from the membrane suction plate 1244, for jetting air onto the membrane sheet 200 during membrane removal or placement, so as to reduce membrane sheet 200 adhesion and improve separation effect.

[0081] Furthermore, the second transfer device 13 is used to drive the film-taking fixture 12 to move between the shelf 11 and the film positioning device 14. The second transfer device 13 can be implemented using a linear module, an industrial robot, or a gantry structure, and can achieve positioning and transfer in the X-axis and / or Y-axis directions according to the shelf layout.

[0082] (vi) Diaphragm positioning device Further, the diaphragm positioning device 14 includes a positioning platform 141, a transverse pushing mechanism 146, a longitudinal pushing mechanism 147, and an elastic pressing assembly 149. The positioning platform 141 has a positioning area 142 for placing the diaphragm 200; a front limiting part 143 is provided on the front side of the positioning area 142, and a right limiting part 144 is provided on the right side; the front limiting part 143 and the right limiting part 144 are connected to form an L-shaped limiting structure, used for reference limiting of adjacent sides of the diaphragm 200. Below the L-shaped limiting structure, the positioning platform 141 has a release paper 202 insertion channel 145 for inserting the edge of the release paper 202; the height of the insertion channel 145 is less than the thickness of the protective film 201, so as to suppress the misalignment of the protective film 201 with the release paper 202 during pushing and alignment.

[0083] The lateral pushing mechanism 146 is slidably disposed on the positioning platform 141 and located on the left side of the positioning area 142, for pushing the diaphragm 200 laterally toward the positioning area 142; the longitudinal pushing mechanism 147 is slidably disposed on the positioning platform 141 and located on the rear side of the positioning area 142, for pushing the diaphragm 200 longitudinally toward the positioning area 142. The lateral pushing mechanism 146 may include a lateral pusher 1461, and the longitudinal pushing mechanism 147 may include a longitudinal pusher 1471, with the pushing end faces of the lateral pusher 1461 and the longitudinal pusher 1471 facing the positioning area 142. At least one of the lateral pushing mechanism 146 and / or the longitudinal pushing mechanism 147 is a pneumatically driven mechanism, and each is provided with a pneumatic control valve 148 connected to an external air source.

[0084] The elastic pressing component 149 is disposed in the positioning area 142 and adjacent to the L-shaped limiting structure, and is used to apply an elastic pressing force to the diaphragm 200 to stabilize the posture of the diaphragm 200 during the pushing, alignment and suction processes. Optionally, the elastic pressing component 149 includes a housing 1491 and multiple sets of elastic units 1492 disposed within the housing 1491; each set of elastic units 1492 includes a spring 1493 and a ball bearing 1494; the housing 1491 is provided with a ball bearing outlet hole 1495, and the ball bearing 1494 is located at the outlet hole 1495 and elastically extends toward the outlet hole 1495 under the action of the spring 1493 to form point contact pressing.

[0085] (vii) Film application clamp and third transfer device Furthermore, the film-applying fixture 15 is used to pick up the positioned film 200, peel off the release paper 202, and attach the protective film 201 to the mobile phone screen. The film-applying fixture 15 includes a film-applying suction plate 151, a main suction component 152, and an auxiliary suction component 156. The main suction component 152 includes at least one main suction cup 1521; the main suction cup 1521 is disposed on the lower surface of the film-applying suction plate 151; a first air passage communicating with the main suction cup 1521 is provided in the film-applying suction plate 151, and the first air passage is provided with a first air source connector 154.

[0086] The film-applying suction plate 151 has a downward-facing mounting cavity 155. The auxiliary suction assembly 156 includes a film-applying auxiliary suction cup 1561, a hollow air guide rod 1562, and a second elastic element 1563. The film-applying auxiliary suction cup 1561 is disposed within the mounting cavity 155; the lower end of the hollow air guide rod 1562 passes through the film-applying suction plate 151, extends into the mounting cavity 155, and communicates with the film-applying auxiliary suction cup 1561; the upper end of the hollow air guide rod 1562 is provided with a second air source connector 1564. The second elastic element 1563 is sleeved on the hollow air guide rod 1562, with one end abutting against the second air source connector 1564 and the other end abutting against the film-applying suction plate 151, thereby forming an elastic reset mechanism for the film-applying auxiliary suction cup 1561, allowing the film-applying auxiliary suction cup 1561 to rise, fall, and reset relative to the film-applying suction plate 151.

[0087] Optionally, the film-applying auxiliary suction cup 1561 can selectively extend to the outer side of the lower surface of the film-applying adsorption plate 151 or retract into the mounting cavity 155 under the action of the elastic reset mechanism; the mounting cavity 155 can be set outside the arrangement area of ​​the main film-applying suction cup 1521, so that the film-applying auxiliary suction cup 1561 is located outside the main film-applying suction cup 1521, thereby providing auxiliary adsorption and positioning stability in the edge area of ​​the film.

[0088] Furthermore, the third transfer device 16 is used to drive the film-applying fixture 15 to pick up the positioned film 200 at the film positioning device 14 and peel off the release paper 202 at the release paper peeling device 17; subsequently, the protective film 201 is transferred to the film-applying station to complete the application. The third transfer device 16 can realize displacement control in the Y-axis and Z-axis directions; if necessary, X-axis adjustment can also be added to adapt to different machine models and station layouts.

[0089] (viii) Release paper peeling device Further, the release paper peeling device 17 is used to peel the release paper 202 from the protective film 201 in the film 200. The release paper peeling device 17 includes, for example, a bracket 171 fixedly installed inside the cabinet 1, a first peeling roller 172, a second peeling roller 173, and a drive motor 174. The first peeling roller 172 and the second peeling roller 173 are rotatably mounted on the bracket 171 and arranged opposite to each other, forming a clamping channel 175 for clamping the release paper 202. The drive motor 174 is driven by the first peeling roller 172 to drive the first peeling roller 172 to rotate and pull the release paper 202 into the clamping channel 175, thereby achieving the peeling of the release paper 202.

[0090] (ix) Roller bonding assembly and dust blowing nozzle Furthermore, the film application station is equipped with a roller bonding component 18; the roller bonding component 18 is used to roller bond the protective film 201 attached to the mobile phone screen to eliminate air bubbles and improve the flatness of the bonding. The roller bonding component 18 can be implemented using rollers, pressure rollers or other rolling structures. Furthermore, the roller bonding component 18 is fixed to the back of the mounting plate 91 of the cleaning device 9.

[0091] Furthermore, the dust-blowing nozzle 6 is connected to a positive pressure air source and is used to blow away dust from the mobile phone screen before applying the screen protector.

[0092] (x) Positive and negative pressure air source devices and air distribution Furthermore, the positive and negative pressure air source device 19 is used to provide selective positive or negative pressure to the pneumatic mechanisms of the cleaning device 9, the membrane clamp 12, the membrane applicator 15, the dust blowing nozzle 6, and the membrane positioning device 14. The positive and negative pressure air source device 19 includes a vacuum pump 191, a first three-way valve 192, an air storage tank 193, a positive pressure gauge 194, an air source processing component 195, a positive pressure distribution pipeline 196, a negative pressure gauge 197, a second three-way valve 198, and a negative pressure distribution pipeline 199.

[0093] The vacuum pump 191 has an inlet and an outlet. The first port of the first three-way valve 192 is connected to the outlet of the vacuum pump 191, the second port is connected to the atmosphere, and the third port is connected to the inlet of the gas storage tank 193. The outlet of the gas storage tank 193 is sequentially connected to the positive pressure gauge 194, the gas source processing component 195, and the inlet of the positive pressure distribution pipeline 196; the positive pressure distribution pipeline 196 is provided with multiple positive pressure output ports 1961.

[0094] The first port of the second three-way valve 198 is connected to the air inlet of the vacuum pump 191, the second port is connected to the atmosphere, and the third port is connected to the inlet of the negative pressure distribution pipeline 199; the negative pressure gauge 197 is provided between the air inlet of the vacuum pump 191 and the second three-way valve 198; the negative pressure distribution pipeline 199 is provided with multiple negative pressure output ports 1991.

[0095] The gas source processing component 195 may include an oil mist separator and a pressure regulating automatic drainer, which are connected sequentially along the airflow direction to improve the cleanliness and stability of the supplied gas. Optionally, the first three-way valve 192, the second three-way valve 198, and each branch three-way valve are three-way solenoid valves to facilitate automatic switching by the controller.

[0096] In an exemplary gas distribution scheme: each positive pressure output port 1961 of the positive pressure distribution pipeline 196 is connected to an external gas-using component through a positive pressure branch three-way valve 1962 (supply end, exhaust end, and gas-using end); each negative pressure output port 1991 of the negative pressure distribution pipeline 199 is connected to an external gas-using component through a negative pressure branch three-way valve 1992 (intake end, exhaust end, and gas-using end).

[0097] For example: at least one positive pressure output port 1961 is connected to the nozzle 921 of the cleaning fluid spraying assembly 92; at least one positive pressure output port 1961 is connected to the positive pressure jet connector 129 of the film-taking clamp 12 and the dust-blowing nozzle 6 via the air distribution connector; at least one positive pressure output port 1961 is connected to the pneumatic control valve 148 of the longitudinal pushing mechanism 147, and at least one positive pressure output port 1961 is connected to the pneumatic control valve 148 of the transverse pushing mechanism 146; at least one negative pressure output port 1991 is connected to the negative pressure connector 128 of the film-taking clamp 12; at least one negative pressure output port 1991 is connected to the first air source connector 154 of the film-applying clamp 15; at least one negative pressure output port 1991 is connected to the second air source connector 1564 of the film-applying clamp 15.

[0098] (xi) Alignment of controller and film The automatic screen protector applicator can be configured with a controller for performing workstation linkage, air path switching, and alignment calculations. The controller can obtain the model information of the mobile phone to be covered and call up the corresponding mobile phone size data and the protective film 201 size data. In the screen protector alignment stage, the target position coordinates of the mobile phone clamping positioning device 7, the film positioning device 14, and the screen protector clamp 15 can be calculated based on the mobile phone size data, the protective film 201 size data, and the reference coordinate parameters and / or calibration parameters pre-stored in the equipment; and the first transfer device 8, the film positioning device 14, and the third transfer device 16 are controlled to move according to the target position coordinates, so that the mobile phone screen and the protective film 201 reach a preset alignment relationship before being applied (e.g., the center of the screen coincides with the center of the protective film 201).

[0099] In summary, the above structure enables the following: after the mobile phone is cleaned at the cleaning station, it is transferred to the screen protector application station; the screen protector retrieval fixture 12 takes out the screen protector 200 from the corresponding screen protector storage box 10 on the shelf 11 and positions the screen protector 200 at the screen protector positioning device 14; the screen protector application fixture 15 picks up the positioned screen protector 200 and peels off the release paper 202 at the release paper peeling device 17 to obtain the protective film 201; then, under alignment control, the protective film 201 is applied to the mobile phone screen, and the roller bonding assembly 18 completes the roller bonding, thereby achieving automated and highly consistent screen protector application.

[0100] How does an automatic screen protector applicator work? The user enters the phone model into the automatic screen protector applicator. The shielding door 3 of the automatic screen protector applicator opens, and the phone is placed into the clamping cavity 72 of the phone clamping and positioning device 7 through the phone pick-up and drop port 2. The phone is then adaptively clamped and positioned by the horizontal clamping plate 73 and the vertical clamping plate 74 under the drive of the horizontal clamping drive mechanism 75 and the vertical clamping drive mechanism 76. Then the first transfer device 8 transfers the clamped and positioned mobile phone to the cleaning station, where the cleaning device 9 cleans and dries the mobile phone screen in the order of "spraying cleaning solution - brushing - wiping with non-woven cloth". Before applying the screen protector, the dust blowing nozzle 6 at the screen protector station blows the dust off the screen. At the same time, the second transfer device 13 drives the membrane retrieval clamp 12 to pick up the membrane 200 from the corresponding membrane storage box 10 on the shelf 11, and releases the membrane 200 to the positioning area 142 of the membrane positioning device 14 through the positive pressure jet connector 129 for separation and the negative pressure air path for adsorption and holding. The membrane 200 is then pushed against the L-shaped limiting structure by the horizontal pushing mechanism 146 and the vertical pushing mechanism 147 to complete the positioning, and the elastic pressing component 149 stabilizes the posture of the membrane 200. The third transfer device 16 drives the film-applying clamp 15 to pick up the positioned film 200 at the film positioning device 14 and then transfer it to the release paper peeling device 17, so that the release paper 202 enters the clamping channel 175 formed by the first peeling roller 172 and the second peeling roller 173 and is separated from the protective film 201 under the traction of the drive motor 174, thereby obtaining the protective film 201 to be applied; Subsequently, the controller calculates and controls the first transfer device 8, the film positioning device 14 and the third transfer device 16 to reach the target coordinates based on the model size data, the protective film 201 size data and the equipment calibration parameters, so that the protective film 201 and the mobile phone screen reach a preset alignment relationship, and the film clamp 15 first attaches the protective film 201 to the screen to form an initial bonding area. During the bonding and venting stages, the main adsorption component 152 of the film-applying clamp 15 provides primary adsorption and retention for the film 200, while the auxiliary adsorption component 156, under the action of the elastic reset mechanism, can undergo controlled relative lifting and lowering during the bonding process. In the initial stage of bonding, the main suction cup releases or reduces negative pressure, and the auxiliary suction cup maintains a certain adsorption force so that the protective film 201 is in a "semi-bonded" state, avoiding air trapping caused by instantaneous full bonding; Subsequently, the rolling bonding component 18 and the protective film 201 generate relative rolling motion. The rolling pressure causes the protective film 201 and the auxiliary suction cup to gradually move downward, realizing a progressive bonding process similar to manual "segmented bonding - segmented degassing". Air bubbles are continuously expelled during the rolling process. When the protective film 201 is completely bonded to the screen, the auxiliary suction cup is removed from the film surface and reset under the action of elastic element reset and adsorption force switching, thus completing the action chain that simulates manual segmented degassing bonding. Finally, the first transfer device 8 drives the clamping and positioning device 7 to carry the mobile phone to complete the entire rolling and pressing process and transfer it back to the mobile phone pick-up and drop-off port 2. The shielding door 3 opens, and the user takes out the mobile phone with the screen protector applied. Throughout the process, the positive and negative pressure air source device 19 provides positive or negative pressure to components such as cleaning, film removal, film application, and dust blowing as needed, realizing the coordination of actions such as adsorption, air spraying, release, and station dust removal, thereby improving the consistency of bonding and reducing defects such as bubbles and wrinkles.

[0101] Film-removing principle of the film-applying fixture 15: The second transfer device 13 moves the film-removing fixture 12 to above the film-removing port 102 of the target film storage box 10 on the shelf 11, and presses it downward along Z to make the film-removing suction cup 126 contact the surface of the film 200; since the sliding seat 1243 can be raised and lowered relative to the upper sliding seat 1242, when the film-removing suction cup 126 contacts the film 200, the sliding seat 1243 will inevitably rise relative to it under the action of the contact reaction force, driving the reflector plate 1251 on its side wall to simultaneously enter the action distance threshold range of the diffuse reflection photoelectric sensor 125, so that the light signal emitted by the sensor is reflected back by the reflector plate 1251 and will inevitably output a trigger signal; after receiving the trigger signal, the controller controls the positive The negative pressure air source device 19 provides negative pressure to the negative pressure connector 128, enabling the membrane suction cup 126 to form a stable adsorption and reliably pick up the membrane 200. At the same time, it supplies positive pressure to the positive pressure jet connector 129 and jets air from its outlet towards the membrane adsorption plate 1244 to weaken the adhesion between the membrane 200 and the lower membrane 200 or the box, and reduce the risk of membrane slippage and missed pick-up. Subsequently, the second transfer device 13 rises and transfers the membrane clamp 12 away from the membrane storage box 10. Thus, the interlocking control of "contact-lift-sensor trigger-negative pressure adsorption" realizes the positioning judgment and adsorption establishment of the membrane picking action, ensuring that the membrane suction cup 126 will definitely pick up the membrane 200 after positioning and improving the success rate and consistency of membrane picking.

[0102] Noun and Symbol Conventions In this specification, unless otherwise expressly defined, the following terms have the following meanings: "Diaphragm 200" refers to an assembly comprising a protective film 201 and a release paper 202 that are attached to each other.

[0103] "Protective film 201" refers to the film layer that is ultimately attached to the surface of the mobile phone screen.

[0104] "Release paper 202" refers to the backing paper that is attached to the protective film 201 and used for temporary support / protection.

[0105] The "membrane retrieval fixture" is used to pick up the membrane 200 from the membrane storage box 10 and release the membrane 200 to the membrane positioning device 14.

[0106] The "film applicator" is used to pick up the positioned film 200 and apply the protective film 201 after the release paper 202 has been peeled off.

[0107] The "first transfer device" is used to drive the mobile phone clamping and positioning device 7 to move (e.g., transfer between the cleaning station and the film application station), and can participate in the relative movement of the bonding / rolling process.

[0108] The "second transfer device" is used to drive the film removal clamp 12 to move between the shelf 11 and the film positioning device 14.

[0109] The "third transfer device" is used to drive the film-applying fixture 15 to move between the film positioning device 14, the release paper peeling device 17, and the film-applying station.

[0110] For ease of description, a device coordinate system is established: the X-axis is horizontal (corresponding to the width of the phone), the Y-axis is vertical (corresponding to the length of the phone), and the Z-axis is vertical (the fitting direction). The above axes are for illustrative purposes only and can be adjusted according to the actual installation direction of the device.

[0111] "First guide rail / first slider / second slider" specifically refers to the guide and slider mechanism in the mobile phone clamping and positioning device 7.

[0112] "Linear guide / upper slide / lower slide" specifically refers to the guide and slide structure in the film removal fixture 12.

[0113] Example 2: An automatic screen protector application method, applied to the above-mentioned automatic screen protector application machine for mobile phones, the method includes the following steps: Step S1: The user enters or the device identifies the model information of the mobile phone to be covered with the screen protector, and the controller calls up the mobile phone size data and the screen protector 201 size data corresponding to the model.

[0114] Step S2: The user places the mobile phone into the clamping cavity 72 of the mobile phone clamping and positioning device 7 through the mobile phone pick-up and drop port 2; the mobile phone clamping and positioning device 7 clamps and positions the mobile phone horizontally and vertically. Optionally, the limit switch 77 detects the entry of the mobile phone and triggers the start process; the shielding door 3 closes to enter the automatic operation state.

[0115] Step S3: The first transfer device 8 drives the mobile phone clamping and positioning device 7 to the cleaning station; the cleaning device 9 sequentially performs cleaning fluid spraying, brushing, and non-woven cloth wiping to clean and dry the mobile phone screen. Subsequently, the first transfer device 8 transfers the mobile phone clamping and positioning device 7 to the screen protector application station; the dust blowing nozzle 6 blows dust off the screen.

[0116] Step S4: The second transfer device 13 drives the membrane retrieval clamp 12 to move between the shelf 11 and the membrane positioning device 14. The membrane retrieval clamp 12 extends into the target membrane storage box 10 and picks up the membrane 200 under negative pressure through the membrane retrieval suction cup 126; optionally, the positive pressure jet nozzle 129 jets air onto the membrane 200 to reduce adhesion. Subsequently, the membrane retrieval clamp 12 releases the membrane 200 into the positioning area 142 of the membrane positioning device 14, and releases the membrane by switching to positive pressure or depressurization when necessary.

[0117] Step S5: The diaphragm positioning device 14 pushes the diaphragm 200 to the L-shaped limiting structure (front limiting part 143 and right limiting part 144) through the transverse pushing mechanism 146 and the longitudinal pushing mechanism 147 to achieve reference limiting positioning; the elastic pressing component 149 applies elastic pressing force to the diaphragm 200 to stabilize the posture of the diaphragm 200.

[0118] Step S6: The third transfer device 16 drives the film-applying fixture 15 to pick up the positioned film 200 at the film positioning device 14 and move the film 200 to the release paper peeling device 17. After the edge of the release paper 202 enters the clamping channel 175 between the peeling rollers (the first peeling roller 172 and the second peeling roller 173), the release paper 202 is peeled off from the protective film 201 under the traction of the drive motor 174; the film-applying fixture 15 retains the protective film 201 and enters the lamination station.

[0119] Step S7: Perform screen protector alignment. Based on the phone size data, the screen protector 201 size data, and the reference coordinate parameters and / or calibration parameters stored in the device, determine the target position coordinates of the phone clamping positioning device 7, the film positioning device 14, and the screen protector clamp 15; and control the first transfer device 8, the film positioning device 14, and the third transfer device 16 to move to the corresponding target position coordinates, so that the screen protector 201 and the phone screen achieve a preset alignment relationship before being applied.

[0120] Step S8: After alignment, the film applicator 15 and the mobile phone clamping and positioning device 7 move relative to each other along the bonding direction (e.g., the Z-axis direction) to attach the protective film 201 to the mobile phone screen; then, the rolling bonding assembly 18 rolls relative to the protective film 201 attached to the mobile phone screen to roll and bond the protective film 201 to eliminate air bubbles and improve the flatness of the bonding.

[0121] Step S9: The first transfer device 8 drives the mobile phone clamping and positioning device 7 to transfer the mobile phone with the protective film 201 applied to the mobile phone pick-up and drop-off port 2; after the shielding door 3 opens, the user takes out the mobile phone with the film applied, and the process ends.

[0122] Example of film alignment calculation In one optional implementation, a predetermined reference point at the upper right corner of the clamping cavity 72 of the mobile phone clamping and positioning device 7 is used as the mobile phone positioning reference origin, and a predetermined reference point at the upper right corner of the positioning area 142 of the diaphragm positioning device 14 is used as the diaphragm 200 positioning reference origin, with the center of the mobile phone screen coinciding with the center of the protective film 201 as the alignment target.

[0123] The device can pre-store initial coordinate parameters (e.g., constants 1 to 5). Wherein: constant 1 is the initial coordinate of the mobile phone clamping and positioning device 7 in the X direction; constant 2 is the initial coordinate of the film positioning device 14 in the X direction; constants 3 and 4 are the first and second initial coordinates of the film-applying clamp 15 in the Y direction, respectively; and constant 5 is the initial coordinate of the mobile phone clamping and positioning device 7 in the Y direction. These constants can be obtained through device calibration.

[0124] In this example, the target coordinates can be determined according to the following relationship: The target coordinate in the X direction of the mobile phone clamping and positioning device 7 is: X = mobile phone width / 2 + constant 1; The target coordinate in the Y direction of the mobile phone clamping and positioning device 7 is: Y = (mobile phone length - protective film 201 length) / 2 + constant 5; The target coordinate of the diaphragm positioning device 14 in the X direction is: X = width of protective film 201 / 2 + constant 2; The target coordinate of the film-applying fixture 15 in the Y direction when picking up the film 200 is: Y = - length of protective film 201 + constant 3; The target coordinate in the Y direction when the film-applying fixture 15 performs peeling at the release paper peeling device 17 is: Y = - length of protective film 201 + constant 4.

[0125] By controlling the target coordinates as described above, and combining the motion coordination of the first transfer device 8, the film positioning device 14, and the third transfer device 16, high-precision alignment between the protective film 201 and the mobile phone screen can be achieved.

[0126] In other optional implementations, the alignment target can also be set to a preset offset relationship between the protective film 201 and the screen, or visual calibration, edge detection and other methods can be introduced to further improve the alignment accuracy.

[0127] Finally, it should be understood that the above embodiments are merely examples. Without departing from the concept of the present invention, those skilled in the art can make various modifications and improvements to the structure of each component, the layout of the workstation, the driving method, and the control strategy. For example, replacing the pneumatic pushing mechanism with an electric pushing mechanism, or replacing the transfer device with a multi-axis robotic arm, etc., should all be considered to fall within the protection scope of the present invention.

Claims

1. A method for aligning a protective film with a mobile phone screen, characterized in that: The method is applied to a screen protector application device, which includes a mobile phone clamping and positioning device, a first conveying device for moving the mobile phone clamping and positioning device, a screen protector positioning device for positioning the screen protector, a screen protector application fixture, a third conveying device for moving the screen protector application fixture, a release paper peeling device, and a roller bonding assembly. The method includes the following steps: Step S1: Obtain the model information of the mobile phone to be screen protectored, and retrieve the mobile phone size data and screen protector size data corresponding to the model; Step S2: Place the mobile phone into the mobile phone clamping and positioning device and clamp and position it; place the film containing the mutually attached protective film and release paper into the film positioning device and complete the film positioning; Step S3: The third transfer device drives the film-applying clamp to pick up the positioned film at the film positioning device, and drives the film-applying clamp to move to the release paper peeling device to peel off the release paper; Step S4: Based on the phone size data, the protective film size data, and the pre-stored initial coordinate parameters of the film application device, calculate the target position coordinates of the phone clamping positioning device, the film positioning device, and the film application fixture, and control the first transfer device, the film positioning device, and the third transfer device to move according to the target position coordinates so that the center of the phone screen is aligned with the center of the protective film; Step S5: After center alignment, move the film applicator and the mobile phone clamping and positioning device relative to each other in the bonding direction so that the protective film is attached to the mobile phone screen; Step S6: The rolling bonding component and the protective film attached to the mobile phone screen are subjected to relative rolling motion to roll bond the protective film.

2. The method for aligning the protective film with the mobile phone screen according to claim 1, characterized in that: The predetermined reference point at the upper right corner of the clamping cavity of the mobile phone clamping and positioning device is taken as the mobile phone positioning reference origin, the predetermined reference point at the upper right corner of the positioning area of ​​the film positioning device is taken as the film positioning reference origin, and the alignment target is the coincidence of the center of the mobile phone screen and the center of the protective film.

3. The method for aligning the protective film with the mobile phone screen according to claim 1, characterized in that: The pre-stored initial coordinate parameters include constants 1 to 5; constant 1 is the initial coordinate of the mobile phone clamping and positioning device in the X direction; constant 2 is the initial coordinate of the film positioning device in the X direction; constants 3 and 4 are the first and second initial coordinates of the film clamp in the Y direction, respectively; constant 5 is the initial coordinate of the mobile phone clamping and positioning device in the Y direction.

4. The method for aligning the protective film with the mobile phone screen according to claim 3, characterized in that: The target coordinates in the X direction of the mobile phone clamping and positioning device satisfy: X = mobile phone width / 2 + constant 1.

5. The method for aligning the protective film with the mobile phone screen according to claim 3, characterized in that: The target coordinate of the mobile phone clamping and positioning device in the Y direction satisfies: Y = (mobile phone length - protective film length) / 2 + constant 5.

6. The method for aligning the protective film with the mobile phone screen according to claim 3, characterized in that: The target coordinates in the X direction of the diaphragm positioning device satisfy: X = protective film width / 2 + constant 2.

7. The method for aligning the protective film with the mobile phone screen according to claim 3, characterized in that: The target coordinate of the Y direction of the film-applying fixture when picking up the film satisfies: Y = - length of protective film + constant 3.

8. The method for aligning the protective film with the mobile phone screen according to claim 3, characterized in that: The target Y-axis coordinate of the film-applying fixture when performing peeling at the release paper peeling device satisfies: Y = -protective film length + constant 4.

9. The method for aligning the protective film with the mobile phone screen according to claim 1, characterized in that: In step S4, the first transfer device drives the mobile phone clamping and positioning device to move along the X-axis and Y-axis, the film positioning device moves along the X-axis, and the third transfer device drives the film applicator to move along the Y-axis and Z-axis.

10. An automatic screen protector applicator for mobile phones, characterized in that: A method for aligning a protective film with a mobile phone screen according to any one of claims 1 to 9 includes a cabinet; the cabinet has a mobile phone loading / unloading port; the cabinet contains a cleaning station and a film application station, the film application station having a dust blowing nozzle; the cabinet also contains a cleaning device, a film storage box and a shelf for carrying the film storage box, a film retrieval clamp and a second transfer device for driving the film retrieval clamp to move, and a positive and negative pressure air source device; wherein, the film storage box is used to store films containing mutually attached protective films and release paper; the second transfer device is used to drive the film retrieval clamp to move between the shelf and the film positioning device to release the film to the film positioning device for positioning; the positive and negative pressure air source device is respectively connected to the cleaning device, the film retrieval clamp, the film application clamp and / or the dust blowing nozzle to selectively provide positive or negative pressure.

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