Device and method for testing screen protective film

Abstract

The invention discloses a screen protective film testing device and method, and relates to the field of protective film defect detection.The screen protective film testing device comprises a conveying mechanism used for conveying a protective film and further comprises a dust removal mechanism and a detection mechanism, the dust removal mechanism comprises an upper sticking roller a, an upper sticking roller b, a lower sticking roller a and a lower sticking roller b, and when the upper sticking roller a and the lower sticking roller a are located at the first dust sticking position, the dust removal mechanism is located at the second dust sticking position; the upper sticking roller a and the lower sticking roller b are located at a first dust sticking position or a cleaning position, the upper sticking roller b and the lower sticking roller b are located at a second dust sticking position or a cleaning position, when the upper sticking roller b and the lower sticking roller b are located at the second dust sticking position, the upper sticking roller a and the lower sticking roller a are located at the first dust sticking position or the cleaning position, and sticking roller cleaning parts are arranged at the cleaning position. And the other group can be automatically switched to a cleaning position for cleaning, so that the problem that the traditional equipment needs to be shut down to replace a sticking roller or cleaned manually is solved, the continuous operation of the detection process is ensured, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a protective film defect detection technology, and in particular to a testing device and method for a screen protective film. Background Art

[0002] Screen protective film is used for temporary protection of the screen surface during the processing of mobile phones. Therefore, there are certain requirements for the quality of the protective film to adapt to the dust protection during processing. When used, the protective film usually needs to be die-cut into a suitable size and its surface defects are inspected. In the Chinese invention patent with publication number CN117805130A, a dust removal station is set to clean the protective film before inspection, and then inspection is carried out. In the Chinese invention patent with publication number CN118641543A, the surface of the protective film is cleaned by a cleaning device to prevent adhered impurities from affecting the inspection work. The existing method usually uses a mucous film set on the surface of the roller for cleaning, but it needs to be frequently torn off the mucous film, and it is difficult to judge when the mucous film is to be torn off. If it is not torn off in time, it is easy to cause impurities to remain, affecting the detection accuracy. There is also a method in the existing technology to coat the surface of the roller with a soft rubber layer and use the adhesiveness of the rubber layer to adhere impurities, but the soft rubber layer also has an adsorption limit. After exceeding the limit, it needs to be cleaned manually in time, which is inefficient. Summary of the Invention

[0003] The purpose of the present invention is to provide a testing device and method for a screen protective film to solve the above-mentioned deficiencies in the prior art.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a testing device for a screen protective film, comprising a conveying mechanism for conveying the protective film, the conveying mechanism being mounted on a frame, and further comprising:

[0005] The dust removal mechanism includes an upper dust-sticking member and a lower dust-sticking member symmetrically arranged along both sides of the protective film, the upper dust-sticking member includes an upper dust-sticking roller a and an upper dust-sticking roller b, and the lower dust-sticking member includes a lower dust-sticking roller a and a lower dust-sticking roller b. When the upper dust-sticking roller a and the lower dust-sticking roller a are located in a first dust-sticking position, the upper dust-sticking roller b and the lower dust-sticking roller b are located in a second dust-sticking position or a cleaning position. When the upper dust-sticking roller b and the lower dust-sticking roller b are located in the second dust-sticking position, the upper dust-sticking roller a and the lower dust-sticking roller a are located in the first dust-sticking position or the cleaning position. A dust-sticking roller cleaning member is provided at the cleaning position.

[0006] A detection mechanism, comprising two detection members arranged on both sides of the dust removal mechanism, for real-time detection of defects in the protective film;

[0007] A first driving member, which is used to drive the upper dust-sticking member to move;

[0008] The second driving member is used to drive the lower dust-sticking member to move.

[0009] Furthermore, the upper dust-sticking member and the lower dust-sticking member at the first dust-sticking position and the second dust-sticking position are arranged to face each other.

[0010] Furthermore, the upper dust-sticking member and the lower dust-sticking member at the first dust-sticking position and the second dust-sticking position are arranged in a staggered manner.

[0011] Furthermore, the first driving member includes a V-shaped inclined groove a opened on the frame and opening downward, and both ends of the upper sticky roller a and the upper sticky roller b of the upper dust-sticking member are fixedly connected to the first rotating shaft, and the surface of the first rotating shaft is rotatably connected to the first slider, and the first slider is slidably connected to the inner wall of the V-shaped inclined groove a. The surface of the first rotating shaft is also rotatably connected to the first shaft sleeve, and the first shaft sleeve is connected to the first cylinder for driving it to move.

[0012] Furthermore, the second driving member includes a V-shaped inclined groove b opened on the frame and opening upward, and both ends of the lower sticky roller a and the lower sticky roller b of the lower dust-sticking member are fixedly connected to the second rotating shaft, and the surface of the second rotating shaft is rotatably connected to the second slider, and the second slider is slidably connected to the inner wall of the V-shaped inclined groove b. The surface of the second rotating shaft is also rotatably connected to the second shaft sleeve, and the second shaft sleeve is connected to the second cylinder for driving it to move.

[0013] Furthermore, the first driving member and the second driving member both include a rotation switch, and the rotation switch includes a shell, one side of the shell is fixedly connected to the input shaft, and the other side of the shell is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the inner wall of the frame, and a first turntable and a second turntable are coaxially arranged in the shell, and a plurality of teeth are opened on the circumference of the first turntable and the second turntable.

[0014] Furthermore, a limit assembly is provided on the shell, and the limit assembly can cooperate with the teeth of the first turntable or the second turntable to rotate synchronously with the shell, and a first output shaft is fixedly connected to one side of the first turntable, and a second output shaft is fixedly connected to one end of the first output shaft and the second output shaft respectively. The first turntable and the second turntable are respectively rotatably connected to the upper sticking roller a and the upper sticking roller b or respectively rotatably connected to the lower sticking roller a and the lower sticking roller b, and the input shaft is connected to a motor for driving its rotation.

[0015] Furthermore, a positioning assembly is provided on one side of the first rotating plate and the second rotating plate, and the positioning assembly includes a positioning seat fixedly installed on one side of the first rotating plate and the second rotating plate, a positioning pin is slidably connected in the positioning seat, and a second spring is provided in the positioning seat, and the elastic force of the second spring acts on the positioning pin to make it tend to approach the frame body, and three pin seats are provided on the side of the frame body close to the positioning pin, and a positioning groove is provided on the pin seat that is compatible with the end of the positioning pin, and the three pin seats are respectively located at the first dust sticking position, the second dust sticking position and the cleaning position.

[0016] Furthermore, the sticky roller cleaning member includes a cleaning cover, and the cleaning cover is connected to a linear moving component for driving the cleaning cover to move in a vertical direction.

[0017] A method for testing a screen protective film, which is applicable to the test equipment for the screen protective film as described above, the method comprising:

[0018] The protective film is transported to the dust removal station through the conveying mechanism;

[0019] Make the upper dust-adhesive piece and the lower dust-adhesive piece contact the upper and lower surfaces of the protective film to adhere to impurities;

[0020] The protective film is inspected twice for defects before and after dust removal by the inspection agency;

[0021] Compare the two test results. When the difference between the test results exceeds a threshold, it is determined that the current working adhesive roller needs to be cleaned.

[0022] The standby adhesive roller is switched to the working position by the first driving member and the second driving member, and the current working adhesive roller is moved to the cleaning position at the same time;

[0023] The surface of the sticky roller in the cleaning position is cleaned by the sticky roller cleaning member, and the continuous alternating use of the working sticky rollers is maintained.

[0024] Compared with the prior art, the screen protection film testing device and method provided by the present invention have the following beneficial effects:

[0025] By setting up two sets of sticky rollers (upper and lower dust-sticking parts) working alternately, when one set is stuck to the working position, the other set can automatically switch to the cleaning position for cleaning. This solves the problem of traditional equipment requiring shutdown to replace sticky rollers or manual cleaning, ensures the continuous operation of the inspection process, and improves inspection efficiency.

[0026] Two defect detections are set up before and after the dust removal process. By comparing the differences in the detection results, it is automatically determined whether the sticky roller needs to be cleaned, avoiding secondary contamination of impurities due to saturation of the sticky roller adsorption, ensuring detection accuracy, and reducing the risk of misjudgment and missed detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0029] Figure 2The embodiment of the present invention provides Figure 1 A schematic diagram of a partial cross-sectional structure;

[0030] Figure 3 The embodiment of the present invention provides Figure 1 A longitudinal section view of the front view;

[0031] Figure 4 A schematic diagram of the partial structure of another embodiment of the first driving member and the second driving member provided by the present invention;

[0032] Figure 5 The embodiment of the present invention provides Figure 4 Schematic diagram of the back structure;

[0033] Figure 6 The embodiment of the present invention provides Figure 5 A schematic diagram of a partial cross-sectional structure;

[0034] Figure 7 The embodiment of the present invention provides Figure 6 Enlarged view of point A in the middle;

[0035] Figure 8 A schematic structural diagram of a positioning assembly provided in an embodiment of the present invention;

[0036] Figure 9 A schematic diagram of the upper dust-sticking member and the lower dust-sticking member provided in an embodiment of the present invention switching between a first dust-sticking position, a second dust-sticking position, and a cleaning position;

[0037] Figure 10 A schematic diagram of the state in which the upper dust-sticking members and the lower dust-sticking members provided in an embodiment of the present invention are arranged in a staggered manner.

[0038] Description of reference numerals:

[0039] 1. Frame; 2. Dust removal mechanism; 21. Upper dust sticking member; 211. Upper dust sticking roller a; 212. Upper dust sticking roller b; 22. Lower dust sticking member; 221. Lower dust sticking roller a; 222. Lower dust sticking roller b; 23. First dust sticking position; 24. Second dust sticking position; 25. Cleaning position; 26. Sticking roller cleaning member; 261. Cleaning cover; 262. Linear moving member; 3. Detection mechanism; 31. Detection member mounting rod; 4. First driving member; 401. V-shaped chute a; 402. First rotating shaft; 403. First slider; 404. First bushing; 405. First cylinder; 5. Second driving member; 501. V-shaped chute b; 502. Second rotating shaft; 503, second slider; 504, second bushing; 505, second cylinder; 6, rotary switch; 601, housing; 602, input shaft; 603, rotating shaft; 604, first turntable; 605, second turntable; 606, tooth mouth; 607, first output shaft; 608, second output shaft; 609, first rotating plate; 610, second rotating plate; 7, limiting assembly; 71, limiting sleeve; 72, pin shaft; 73, pin column; 74, first spring; 75, limiting retaining ring; 8, positioning assembly; 81, positioning seat; 82, positioning pin; 83, second spring; 84, pin seat; 85, positioning groove; 9, protective film. DETAILED DESCRIPTION

[0040] During the inspection of the protective film, it is necessary to inspect its surface defects. The adsorbed impurities on the surface of the protective film are also a factor that interferes with the detection results. The existing method usually adopts a mucous film set on the roller surface for cleaning, but it needs to frequently tear off the mucous film, and it is difficult to judge when the mucous film is torn off. If it is not torn off in time, it is easy to cause impurities to remain, affecting the detection accuracy. There is also a method in the prior art to coat the roller surface with a soft rubber layer and use the adhesion of the rubber layer to adhere impurities, but the soft rubber layer also has an adsorption limit. Once the adsorption limit is exceeded, the impurities will fall off and re-contaminate the protective film. After exceeding the limit, the machine needs to be shut down and manually cleaned or replaced in time, affecting the detection efficiency. In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings.

[0041] See also Figure 1 - Figure 10, a testing device for a screen protective film, comprising a conveying mechanism (not shown) for conveying the protective film, the conveying mechanism being mounted on a frame 1, a dust removal mechanism 2 being mounted on the frame 1, the dust removal mechanism 2 comprising an upper dust-sticking member 21 and a lower dust-sticking member 22 symmetrically arranged along both sides of a protective film 9, the upper dust-sticking member 21 comprising an upper dust-sticking roller a211 and an upper dust-sticking roller b212, the lower dust-sticking member 22 comprising a lower dust-sticking roller a221 and a lower dust-sticking roller b222, when the upper dust-sticking roller a211 and the lower dust-sticking roller a221 are located at a first dust-sticking position 23, the upper dust-sticking roller b212 and the lower dust-sticking roller b222 are located at a second dust-sticking position 24 or a cleaning position 25, when the upper dust-sticking roller b212 and the lower dust-sticking roller b222 are located at the second dust-sticking position 24, the upper dust-sticking roller a211 and the lower dust-sticking roller a221 are located at the first dust-sticking position 23 or the cleaning position 25, and a dust-sticking roller cleaning member 26 is provided at the cleaning position 25;

[0042] like Figure 1 and Figure 2 As shown, the protective film 9 enters the dust removal mechanism 2 through the conveying mechanism, and the upper dust sticking member 21 and the lower dust sticking member 22 contact the upper and lower surfaces of the protective film 9, adhering to the impurities on the protective film 9. As the protective film 9 is continuously conveyed, it is continuously cleaned to ensure that the impurities are continuously adhered to and removed;

[0043] The detection mechanism 3 includes two detection components (not shown) arranged on both sides of the dust removal mechanism 2, which are used to perform real-time detection of defects in the protective film 9. The detection components are installed on the detection component mounting rod 31. During the detection process, the detection component located behind the protective film 9 in the conveying direction performs a second detection on the protective film 9 that has passed the dust removal. By comparing the detection results of the two detection components, the defects of the protective film are determined. In addition, an additional detection component can be added behind the detection component to further confirm defects and improve detection accuracy. The detection mechanism 3 can also determine whether the sticky roller of the dust removal mechanism 2 needs to be cleaned or replaced by comparing the detection results;

[0044] When the adhesive roller needs to be replaced, take the upper adhesive roller b212 and the lower adhesive roller b222 that are currently in contact with the protective film 9 as an example. Figure 9As shown, the upper sticking roller a211 and the lower sticking roller a221 move from the cleaning position 25 to the first dust sticking position 23, and fit with the upper and lower surfaces of the protective film 9 at this position, and the upper sticking roller b212 and the lower sticking roller b222 move from the second dust sticking position 24 to the cleaning position 25 for cleaning or replacement, ensuring that the sticking rollers always maintain efficient adhesion capabilities and do not affect the continuity and accuracy of the detection process. It should be understood that since the first dust sticking position 23 and the second dust sticking position 24 are at a certain distance, after the upper sticking roller a211 and the lower sticking roller a221 move to the first dust sticking position 23 and process for a certain period of time, the upper sticking roller b212 and the lower sticking roller b222 move from the second dust sticking position 24 to the cleaning position 25 to ensure that the protective film 9 between the first dust sticking position 23 and the second dust sticking position 24 can also be cleaned during the movement of the sticking rollers;

[0045] After the upper sticky roller b212 and the lower sticky roller b222 move from the second dust-sticking position 24 to the cleaning position 25, the sticky roller cleaning member 26 cleans the sticky roller in the cleaning position 25 to clean the impurities adhered to it to restore the dust-sticking effect. For the sticky roller, its surface is covered with a soft rubber layer, which has a certain viscosity.

[0046] A first driving member 4, which is used to drive the upper dust-binding member 21 to move;

[0047] The second driving member 5 is used to drive the lower dust-sticking member 22 to move.

[0048] In one embodiment of the present invention, the upper dust sticking member 21 and the lower dust sticking member 22 at the first dust sticking position 23 and the second dust sticking position 24 are arranged in a face-to-face relationship. Figure 3 As shown;

[0049] In one embodiment of the present invention, the upper dust sticking member 21 and the lower dust sticking member 22 at the first dust sticking position 23 and the second dust sticking position 24 are arranged in a staggered manner, such as Figure 10 As shown, this method increases the contact area of the protective film 9 on the surface of the sticky roller, increases the contact time between the protective film 9 and the sticky roller surface at the same position, and enhances the adsorption effect of the sticky roller on impurities on the surface of the protective film 9, thereby ensuring that the surface impurities of the protective film 9 are effectively removed after the sticky roller treatment, further improving the accuracy and reliability of the test results. In addition, the staggered arrangement makes the protective film 9 more evenly stressed during the sticky roller treatment, avoiding damage to the film surface caused by excessive local force.

[0050] In one embodiment of the present invention, the first driving member 4 includes a V-shaped inclined groove a401 opened on the frame 1 and opening downward. The upper sticking roller a211 and the upper sticking roller b212 of the upper dust-sticking member 21 are fixedly connected to the first rotating shaft 402 at both ends. The first sliding block 403 is rotatably connected to the surface of the first rotating shaft 402. The first sliding block 403 is slidably connected to the inner wall of the V-shaped inclined groove a401. The first rotating shaft 402 is also rotatably connected to the surface of the first rotating shaft 402. The first sleeve 404 is connected to a first cylinder 405 for driving its movement.

[0051] In one embodiment of the present invention, the second driving member 5 includes a V-shaped inclined groove b501 opened on the frame 1 and opening upward. The lower sticking roller a221 and the lower sticking roller b222 of the lower dust sticking member 22 are fixedly connected to the second rotating shaft 502 at both ends. The second rotating shaft 502 is rotatably connected to the second slider 503. The second slider 503 is slidably connected to the inner wall of the V-shaped inclined groove b501. The second rotating shaft 502 is also rotatably connected to the second shaft sleeve 504. The second shaft sleeve 504 is connected to a second cylinder 505 for driving its movement.

[0052] like Figure 2 and Figure 3 As shown, the first slider 403 and the second slider 503 are driven by the first cylinder 405 and the second cylinder 505 to move in the V-shaped inclined groove, driving the upper dust-sticking member 21 and the lower dust-sticking member 22 to switch between the first dust-sticking position 23, the second dust-sticking position 24 and the cleaning position 25;

[0053] In one embodiment of the present invention, another driving mode of the first driving member 4 and the second driving member 5 is provided. Specifically, the first driving member 4 and the second driving member 5 both include a rotary switch 6. The rotary switch 6 includes a shell 601. One side of the shell 601 is fixedly connected to the input shaft 602, and the other side of the shell 601 is fixedly connected to the rotating shaft 603. The rotating shaft 603 is rotatably connected to the inner wall of the frame 1. A first turntable 604 and a second turntable 605 are coaxially arranged in the shell 601. A plurality of teeth 606 are provided on the circumference of the first turntable 604 and the second turntable 605. A limit assembly 7 is provided on the shell 601, and the limit assembly 7 can be connected to the inner wall of the frame 1. The teeth 606 of the first rotating disk 604 or the second rotating disk 605 cooperate to rotate synchronously with the housing 601. A first output shaft 607 is fixedly connected to one side of the first rotating disk 604, and a second output shaft 608 is fixedly connected to one side of the second rotating disk 605. One end of the first output shaft 607 and the second output shaft 608 are respectively fixedly connected to a first rotating plate 609 and a second rotating plate 610. The first rotating plate 609 and the second rotating plate 610 are respectively rotatably connected to the upper sticking roller a211 and the upper sticking roller b212 or respectively rotatably connected to the lower sticking roller a221 and the lower sticking roller b222. The input shaft 602 is connected to a motor (not shown) for driving its rotation.

[0054] In one embodiment of the present invention, two limit assemblies 7 are provided, and the limit assemblies 7 include a limit sleeve 71, a pin shaft 72 is slidably connected in the limit sleeve 71, one end of the pin shaft 72 extends into the housing 601 and is fixedly connected to a pin column 73, a first spring 74 is provided in the limit sleeve 71, and the elastic force of the first spring 74 acts on the pin shaft 72 to make the pin shaft 72 have a tendency to move away from the housing 601, and two limit retaining rings 75 are provided outside the housing 601, and the two limit retaining rings 75 are respectively located on the moving paths of the ends of the two pin shafts 72. When one end of the pin shafts 72 of the two limit assemblies 7 moves inside the limit retaining ring 75, it can push the pin column 73 to move into the tooth opening 606;

[0055] like Figure 4 - Figure 7 As shown, compared with the aforementioned first driving member 4 and second driving member 5, by providing a rotary switch 6, complex connections between multiple driving members are avoided, the structure is simplified, and the first turntable 604 and the second turntable 605 can be rotated by simply driving the input shaft 602 by the motor, thereby achieving position switching between the upper sticking roller a211 and the upper sticking roller b212 or the lower sticking roller a221 and the lower sticking roller b222, thereby improving the operating efficiency of the equipment and reducing maintenance costs;

[0056] For specific implementation, see Figure 6 and Figure 7 When the input shaft 602 rotates, it drives the housing 601 to rotate. The housing 601 drives the first turntable 604 or the second turntable 605 to rotate synchronously through the cooperation of the limit assembly 7, so that the first output shaft 607 or the second output shaft 608 rotates accordingly, and then drives the first rotating plate 609 or the second rotating plate 610 to rotate, realizing the precise position switching of the upper sticking roller a211 and the upper sticking roller b212 or the lower sticking roller a221 and the lower sticking roller b222. The limit ring 75 is set according to the required position. When the pin shaft 72 When it moves to the position of the limit ring 75, the pin shaft 72 is pushed to move toward the housing 601, and at the same time, the first spring 74 is compressed, and the pin column 73 at the end of the pin shaft 72 moves into the tooth mouth 606 and locks with the first turntable 604 or the second turntable 605, thereby driving them to rotate; when the input shaft 602 rotates, it first drives the sticking roller at the cleaning position 25 to move. When the sticking roller moves to the first dust sticking position 23 or the second dust sticking position 24, the sticking roller originally in the working state moves toward the cleaning position 25 again.

[0057] When the sticking roller is in the first sticking position 23, the second sticking position 24 and the cleaning position 25, it is difficult to stabilize the corresponding operation in the position by relying solely on the limitation of the driving member. For example, when it is in the cleaning position 25, it is difficult to stabilize it even with the limiting effect of the sticking roller cleaning member 26 during the cleaning operation. In one embodiment of the present invention, a method for solving this problem is provided. A positioning assembly 8 is provided on one side of the first rotating plate 609 and the second rotating plate 610. The positioning assembly 8 includes a positioning seat 81 fixedly mounted on one side of the first rotating plate 609 and the second rotating plate 610. A positioning pin 82 is slidably connected in the positioning seat 81. A second spring 83 is provided in the positioning seat 81. The elastic force of the second spring 83 acts on the positioning pin 82 to make it have a tendency to approach the frame 1. Three pin seats 84 are provided on the side of the frame 1 close to the positioning pin 82. A positioning groove 85 is provided on the pin seat 84 to match the end of the positioning pin 82. The three pin seats 84 are respectively located in the first sticking position 23, the second sticking position 24 and the cleaning position 25. Figure 8 As shown, when the positioning pin 82 moves to one of the positioning slots 85, the second spring 83 is compressed, and the positioning pin 82 fits into the positioning slot 85, so that the first rotating plate 609 or the second rotating plate 610 is stably fixed, ensuring that the bonding roller operates accurately at each position.

[0058] In one embodiment of the present invention, the sticky roller cleaning member 26 includes a cleaning cover 261, which is connected to a linear moving component 262 for driving it to move in the vertical direction. The linear moving component 262 is a cylinder or a hydraulic cylinder or an electric telescopic rod. The method is the existing technology and will not be described in detail here. The cleaning cover 261 is filled with a cleaning liquid or a nozzle, etc., which is used to efficiently clean the surface of the sticky roller and remove impurities adhered to its surface. The cleaning liquid can be a volatile liquid such as alcohol or an air-drying device (not shown in the figure) after cleaning to ensure that the surface of the sticky roller is dry and free of residue, and restore the viscosity of the sticky roller so that it can be put into work again.

[0059] In one embodiment of the present invention, a method for testing a screen protective film is provided, which specifically includes the following steps:

[0060] The protective film is transported to the dust removal station through the conveying mechanism;

[0061] Make the upper dust-adhesive piece and the lower dust-adhesive piece contact the upper and lower surfaces of the protective film to adhere to impurities;

[0062] The protective film is inspected twice for defects before and after dust removal by the inspection agency;

[0063] Compare the two test results. When the difference between the test results exceeds a threshold, it is determined that the current working adhesive roller needs to be cleaned.

[0064] The standby adhesive roller is switched to the working position by the first driving member and the second driving member, and the current working adhesive roller is moved to the cleaning position at the same time;

[0065] The surface of the sticky roller in the cleaning position is cleaned by the sticky roller cleaning member, and the continuous alternating use of the working sticky rollers is maintained.

[0066] It should be noted that exceeding the set threshold means that the accumulation of impurities on the surface of the sticky roller has affected the dust removal effect and requires timely cleaning to restore its normal function.

[0067] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present invention.

Claims

1. A screen protective film testing device, comprising a conveying mechanism for conveying the protective film, the conveying mechanism being mounted on a frame, and characterized in that: The dust removal mechanism includes an upper dust-sticking member and a lower dust-sticking member symmetrically arranged along both sides of the protective film, the upper dust-sticking member includes an upper dust-sticking roller a and an upper dust-sticking roller b, and the lower dust-sticking member includes a lower dust-sticking roller a and a lower dust-sticking roller b. When the upper dust-sticking roller a and the lower dust-sticking roller a are located in a first dust-sticking position, the upper dust-sticking roller b and the lower dust-sticking roller b are located in a second dust-sticking position or a cleaning position. When the upper dust-sticking roller b and the lower dust-sticking roller b are located in the second dust-sticking position, the upper dust-sticking roller a and the lower dust-sticking roller a are located in the first dust-sticking position or the cleaning position. A dust-sticking roller cleaning member is provided at the cleaning position. A detection mechanism, comprising two detection members arranged on both sides of the dust removal mechanism, for real-time detection of defects in the protective film; A first driving member, which is used to drive the upper dust-sticking member to move; The second driving member is used to drive the lower dust-sticking member to move.

2. The screen protection film testing device according to claim 1, characterized in that: The upper dust-sticking part and the lower dust-sticking part at the first dust-sticking position and the second dust-sticking position are arranged in a facing relationship.

3. The screen protection film testing device according to claim 1, characterized in that: The upper dust-sticking piece and the lower dust-sticking piece at the first dust-sticking position and the second dust-sticking position are arranged in a staggered manner.

4. The screen protection film testing device according to claim 1, characterized in that: The first driving member includes a V-shaped inclined groove a opened on the frame and opening downward, and both ends of the upper sticky roller a and the upper sticky roller b of the upper dust-sticking member are fixedly connected to the first rotating shaft, and the surface of the first rotating shaft is rotatably connected to the first slider, and the first slider is slidably connected to the inner wall of the V-shaped inclined groove a. The surface of the first rotating shaft is also rotatably connected to the first shaft sleeve, and the first shaft sleeve is connected to the first cylinder for driving it to move.

5. The screen protection film testing device according to claim 1, characterized in that: The second driving member includes a V-shaped inclined groove b opened on the frame and opening upward, and both ends of the lower sticky roller a and the lower sticky roller b of the lower dust-sticking member are fixedly connected to the second rotating shaft, and the second rotating shaft surface is rotatably connected to the second slider, and the second slider is slidably connected to the inner wall of the V-shaped inclined groove b. The second rotating shaft surface is also rotatably connected to the second shaft sleeve, and the second shaft sleeve is connected to the second cylinder for driving it to move.

6. The screen protection film testing device according to claim 1, characterized in that: The first driving member and the second driving member both include a rotation switch, and the rotation switch includes a shell, one side of the shell is fixedly connected to the input shaft, and the other side of the shell is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the inner wall of the frame, and a first turntable and a second turntable are coaxially arranged in the shell, and a plurality of teeth are opened on the circumference of the first turntable and the second turntable.

7. The screen protection film testing device according to claim 6, characterized in that: The shell is provided with a limiting component, which can cooperate with the tooth mouth of the first turntable or the second turntable to rotate synchronously with the shell. One side of the first turntable is fixedly connected to the first output shaft, and one side of the second turntable is fixedly connected to the second output shaft. One end of the first output shaft and the second output shaft are respectively fixedly connected to the first rotating plate and the second rotating plate. The first rotating plate and the second rotating plate are respectively rotatably connected to the upper sticking roller a and the upper sticking roller b or respectively rotatably connected to the lower sticking roller a and the lower sticking roller b, and the input shaft is connected to a motor for driving its rotation.

8. The screen protection film testing device according to claim 7, characterized in that: A positioning assembly is provided on one side of the first rotating plate and the second rotating plate, and the positioning assembly includes a positioning seat fixedly installed on one side of the first rotating plate and the second rotating plate, a positioning pin is slidably connected in the positioning seat, and a second spring is provided in the positioning seat, and the elastic force of the second spring acts on the positioning pin to make it tend to approach the frame body, and three pin seats are provided on the side of the frame body close to the positioning pin, and a positioning groove is provided on the pin seat that is compatible with the end of the positioning pin, and the three pin seats are respectively located at the first dust sticking position, the second dust sticking position and the cleaning position.

9. The screen protection film testing device according to claim 1, characterized in that: The sticky roller cleaning member comprises a cleaning cover, which is connected to a linear moving component for driving the cleaning cover to move in a vertical direction.

10. A method for testing a screen protective film, which is applicable to the testing device for the screen protective film according to any one of claims 1 to 9, characterized in that: The method comprises: The protective film is transported to the dust removal station through the conveying mechanism; Make the upper dust-adhesive piece and the lower dust-adhesive piece contact the upper and lower surfaces of the protective film to adhere to impurities; The protective film is inspected twice for defects before and after dust removal by the inspection agency; Compare the two test results. When the difference between the test results exceeds a threshold, it is determined that the current working adhesive roller needs to be cleaned. The standby adhesive roller is switched to the working position by the first driving member and the second driving member, and the current working adhesive roller is moved to the cleaning position at the same time; The surface of the sticky roller in the cleaning position is cleaned by the sticky roller cleaning member, and the continuous alternating use of the working sticky rollers is maintained.

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