Protective film pressing device capable of preventing generation of bubbles and use method of protective film pressing device

Abstract

The invention discloses a protective film pressing device capable of preventing bubbles from being generated, and belongs to the technical field of protective film pressing, the protective film pressing device comprises a supporting seat, a bubble detection assembly, a secondary bubble scraping assembly and an auxiliary pressing assembly, and the supporting seat is provided with three mounting grooves penetrating through the upper surface and the lower surface of the supporting seat; a primary pressing roller set and a secondary pressing roller set are installed in the installation grooves in the two ends through bearings correspondingly, a bubble detection assembly is installed in the installation groove in the middle, the bubble detection assembly is connected with a secondary bubble scraping assembly, and the secondary bubble scraping assembly is arranged between the bubble detection assembly and the secondary pressing roller set. An exhaust scraping plate is arranged between the primary pressing roller set and the bubble detection assembly, and the exhaust scraping plate is supported on the upper surface of the supporting seat through a supporting rod frame. According to the protective film, bubbles can be prevented from being generated after the protective film body and the bottom film are pressed, adsorption of the protective film body and the bottom film can be improved, and therefore pressing of the protective film body and the bottom film is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of protective film lamination, and in particular to a protective film lamination device for preventing bubble generation and a use method thereof. Background Art

[0002] In the field of electronic equipment manufacturing, such as mobile phones and tablet computers, their display screens, touch screens and other components are very susceptible to scratches, dust pollution and physical damage. In order to protect the integrity of these precision components during transportation, assembly and the initial use by end users, protective films need to be attached to their surfaces; During the production process of the protective film, the protective film body needs to be covered with a base film to prevent the protective film from being contaminated. The protective film pressing device is a device that presses the base film and the protective film together during the production process of the protective film; The existing protective film laminating device still has the following technical problems when in use, such as: 1. The existing protective film laminating device cannot prevent the generation of bubbles when in use, which results in bubbles on the finished product after the protective film body and the base film are pressed together, affecting the appearance and subsequent sales; 2. The existing protective film pressing device cannot assist the protective film body and the bottom film in pressing when in use. This is because when the two are pressed together, the air between them will be squeezed, which is not conducive to the two being closely attached together, thus causing bubbles to easily be generated during the pressing process; Therefore, a protective film pressing device for preventing the generation of bubbles is needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a protective film pressing device for preventing the generation of bubbles, so as to solve the problem mentioned in the above background technology that the existing protective film pressing device cannot prevent the generation of bubbles and has no auxiliary pressing structure.

[0004] To achieve the above object, the present invention provides the following technical solutions: A protective film laminating device for preventing bubble generation and a method of using the same, comprising a support seat, a bubble detection component, a secondary bubble scraping component and an auxiliary laminating component, the support seat being provided with three mounting grooves penetrating the upper and lower surfaces thereof, and the mounting grooves at both ends are respectively provided with bearings for mounting a primary pressure roller group and a secondary pressure roller group, and the middle mounting groove is provided with a bubble detection component, the bubble detection component is connected to the secondary bubble scraping component, and the secondary bubble scraping component is arranged between the bubble detection component and the secondary pressure roller group, an exhaust scraper is arranged between the primary pressure roller group and the bubble detection component, and the exhaust scraper is supported on the upper surface of the support seat by a support rod frame, the primary pressure roller group is connected with an auxiliary laminating component, and the auxiliary laminating component is also connected to the support seat.

[0005] Preferably, the bubble detection assembly includes a test roller, a fixed roller, a piston tube and a support block, the test roller is installed above the fixed roller, and the bearings at both ends of the fixed roller are connected to the two sides of the middle installation groove, the bearings at both ends of the test roller pass through the corresponding support blocks, and the upper end of the support block is fixedly connected to the corresponding piston rod, the upper end of the piston rod is seamlessly slidably connected to the inner side of the opening at the lower end of the piston tube, and the upper end of the piston tube is fixedly connected to the support seat, a spring movably nested in the outside of the piston rod is provided between the opening at the lower end of the piston tube and the upper surface of the support block, and the support seat is provided with an air inlet hole that passes through the piston tube.

[0006] Preferably, the secondary bubble scraping assembly includes a support pipe rack, a support frame and a rubber limit block. The support frame is arranged between the inspection roller and the re-pressure roller group, and the support frame is fixed to the upper surface of the support seat through the support pipe rack. The inner side of the lower surface of the support frame is seamlessly connected with a piston plate, and the lower surface of the piston plate is fixedly connected with a support bar. A rubber limit block is arranged inside the support frame, and the rubber limit block is arranged between the upper surface of the support bar and the lower surface of the support frame. Through holes are evenly arranged within the height range of the support frame where the rubber limit block is located, and the piston tube is connected with the support pipe rack through the air supply pipe.

[0007] Preferably, the lower surface of the support bar and the lower surface of the exhaust scraper are both provided with rubber scrapers, and the two exhaust scrapers and the two support bars are all arranged in an I shape.

[0008] Preferably, the highest point of the fixed roller is located on the upper surface of the support seat where the support strip and the exhaust scraper are located, and the highest point of the fixed roller is coplanar with the highest point of the roller shaft below the initial pressure roller group and the secondary pressure roller group.

[0009] Preferably, the support pipe rack is connected to the support frame to facilitate the gas in the piston tube 1 to be transported to the support frame to increase the pressure in the support frame.

[0010] Preferably, the auxiliary pressing assembly includes a piston tube 2, a disc and an exhaust hole, the two piston tubes 2 are arranged on the side of the support seat at the initial pressure roller group, and the interior of the piston tube 2 is seamlessly and slidably connected with a piston disc, the upper surface axis of the piston disc is connected to the lower end of the corresponding connecting rod, and the upper end axis of the connecting rod is connected to the eccentric position of the disc, the disc is coaxially fixedly connected to the end of the roller shaft above the initial pressure roller group, the lower end of the piston tube 2 is penetrated by an air guide pipe and an air intake port, and the air intake port is installed on the upper surface of the support seat, and the piston tube 2 is also provided with an exhaust hole.

[0011] Preferably, the exhaust hole, the position where the air guide tube and piston tube 2 are connected, and the position where the air inlet hole, piston tube 1 and air delivery pipe are connected are all provided with a one-way valve.

[0012] Preferably, the air intake port is trumpet-shaped and is arranged on the feeding side of the initial pressing roller group.

[0013] A method for using a protective film laminating device, comprising: Step 1: Feed the protective film body and the base film from the position of the initial pressing roller group, and the two will be initially pressed together after passing through the initial pressing roller group; Step 2: During the process of the initial pressing roller group pressing the protective film body and the bottom film, the roller shaft on it rotates, driving the disc to rotate, so that the connecting rod connected to the eccentric position shaft drives the piston disc to move up and down reciprocatingly, and the air inlet can continuously generate suction through the exhaust hole and the one-way valve arranged at the connection position of the air guide pipe and the piston pipe. The suction force generated by the air inlet absorbs the air between the protective film body and the bottom film before the two are pressed together, thereby generating negative pressure between the two, which helps the two to stick to each other, and is conducive to the two being pressed together by the initial pressing roller group, and can also reduce the amount of bubbles generated when the two are pressed together; Step 3: After the protective film body and the bottom film are pressed by the initial pressing roller group, all or part of the bubbles will be scraped off when they pass through the exhaust scraper; Step 4: When the protective film body and the bottom film that have passed through the exhaust scraper and the bubbles have not been completely scraped off pass through the inspection roller, one end of the inspection roller will move up according to the position of the bubbles. When the end of the inspection roller moves up, the piston rod of the end will move into the corresponding piston tube 1, thereby squeezing the air in the piston tube 1, so that the air in the piston tube 1 enters the support pipe rack through the air pipe, and finally enters the support frame to increase the pressure in the support frame. The increase in the pressure in the support frame will cause the piston plate to move down, thereby driving the support bar to move down, thereby increasing the pressure between the rubber scraper connected to the lower surface of the support bar and the protective film body; Step 5: When the protective film body and the bottom film pass through the support frame, the rubber strip below them will completely scrape away the bubbles, so that the finished product formed by the protective film body and the bottom film basically has no bubbles, thereby improving the aesthetics and facilitating sales. Compared with the prior art, the beneficial effects of the present invention are: the protective film laminating device for preventing bubble generation can avoid the generation of bubbles after the protective film body and the bottom film are pressed together, and can help to improve the adsorption of the protective film body and the bottom film, thereby facilitating the pressing of the protective film body and the bottom film: 1. The exhaust scraper can scrape off the bubbles generated after the base film, the protective film body and the base film are initially pressed together. If the bubbles generated by the initial pressing are not completely discharged, the bulging bubbles will cause the inspection roller to lift, and then the gas in the piston tube 1 will be transported to the support frame, thereby increasing the air pressure in the support frame, so that the support bar moves downward, thereby increasing the pressure of the rubber scraper on the lower surface of the support bar on the protective film body, which helps to more thoroughly remove the bubbles, so as to avoid the generation of bubbles after the protective film body and the base film are pressed together; 2. When the initial pressing roller group presses the base film and the protective film body for the first time, the roller shaft on the initial pressing roller group will drive the disc to rotate, and then the piston disc will continuously move up and down through the connecting rod. The reciprocating movement of the piston disc can continuously generate suction at the suction port, thereby absorbing the air between the base film and the protective film body before they are pressed together, which helps the two to adsorb each other and facilitates subsequent pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of point A; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point B in the middle; Figure 5 It is a schematic diagram of a partial cross-sectional structure of the present invention; Figure 6 For the present invention Figure 5 The schematic diagram of the enlarged structure of point C in the middle; Figure 7 This is a schematic diagram of the cross-sectional structure of the support frame of the present invention; Figure 8 This is a schematic diagram of the connection structure between the inspection roller and the support frame of the present invention; Fig. 9 For the present invention Figure 8 A schematic diagram of a partial cross-sectional structure; Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point D.

[0015] In the figure: 1. support seat; 2. initial pressure roller group; 3. inspection roller; 4. re-pressure roller group; 5. support rod frame; 6. exhaust scraper; 7. support pipe frame; 8. support frame; 9. fixed roller; 10. piston tube one; 11. air inlet; 12. air delivery pipe; 13. piston tube two; 14. piston rod; 15. spring; 16. support block; 17. air intake; 18. air guide pipe; 19. disc; 20. connecting rod; 21. piston disc; 22. exhaust hole; 23. support strip; 24. through hole; 25. piston plate; 26. rubber limit block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problem that bubbles are easily generated in the process of laminating the protective film body and the base film in the previous protective film laminating device, which leads to an unsightly finished product and affects sales, the following technical solution is provided, specifically, a protective film laminating device to prevent the generation of bubbles, including a support seat 1, a bubble detection component, a secondary bubble scraping component and an auxiliary laminating component, the support seat 1 is provided with three mounting grooves running through the upper and lower surfaces thereof, and the mounting grooves at both ends are respectively bearing-mounted with a primary pressure roller group 2 and a secondary pressure roller group 4, and a bubble detection component is installed in the middle mounting groove, the bubble detection component is connected to the secondary bubble scraping component, and the secondary bubble scraping component is arranged between the bubble detection component and the secondary pressure roller group 4, an exhaust scraper 6 is arranged between the primary pressure roller group 2 and the bubble detection component, and the exhaust scraper 6 is supported on the upper surface of the support seat 1 through a support rod frame 5.

[0018] The bubble detection assembly includes a test roller 3, a fixed roller 9, a piston tube 10 and a support block 16. The test roller 3 is installed above the fixed roller 9, and the bearings at both ends of the fixed roller 9 are connected to the two sides in the middle installation groove. The bearings at both ends of the test roller 3 pass through the corresponding support block 16, and the upper end of the support block 16 is fixedly connected with the corresponding piston rod 14. The upper end of the piston rod 14 is seamlessly slidably connected to the inner side of the lower end opening of the piston tube 10, and the upper end of the piston tube 10 is fixedly connected to the support seat 1. A spring 15 movably nested on the outside of the piston rod 14 is arranged between the opening at the lower end of the piston tube 10 and the upper surface of the support block 16. The support seat 1 is provided with an air inlet 11 that passes through the piston tube 10. The protective film body and the bottom film are After the roller group 2 is pressed together, bubbles may exist between the two. As the pressed protective film body and the bottom film move, the rubber scraper on the exhaust scraper 6 will scrape off the bubbles. If the exhaust scraper 6 does not scrape thoroughly, the bubbles between the protective film body and the bottom film will cause the inspection roller 3 to lift up when passing between the inspection roller 3 and the fixed roller 9. According to the lifted end of the inspection roller 3, the piston rod 14 of the end is moved into the corresponding piston tube 10, thereby squeezing the gas in the piston tube 10, so that the gas in the piston tube 10 enters the support pipe rack 7 through the air supply pipe 12. The secondary bubble scraping assembly includes a support pipe rack 7, a support frame 8 and a rubber limit block 26. The support frame 8 is arranged between the inspection roller 3 and the re-pressing roller group 4, and the support frame 8 is fixed by the support pipe rack 7 The upper surface of the support seat 1 is fixed, and the inner side of the lower surface of the support frame 8 is seamlessly connected with a piston sheet 25, and the lower surface of the piston sheet 25 is fixedly connected with a support strip 23. A rubber limit block 26 is arranged inside the support frame 8, and the rubber limit block 26 is arranged between the upper surface of the support strip 23 and the lower surface of the support frame 8. Through holes 24 are evenly arranged within the height range of the support frame 8 where the rubber limit block 26 is located. The piston tube 10 is connected with the support pipe rack 7 through the gas supply pipe 12. The gas entering the support pipe rack 7 will eventually enter the support frame 8, thereby increasing the pressure in the support frame 8, so that the piston sheet 25 in the support frame 8 is pressed and moves downward. When the piston sheet 25 moves downward, it drives the support strip 23 connected thereto to move downward synchronously, thereby increasing the support strip 2 3, the rubber scraper connected to the lower surface of the support bar 23 exerts pressure on the protective film body, thereby helping to remove bubbles more thoroughly. In addition, when the pressing device is used for a long time, more and more gas will enter the support frame 8. When the pressure in the support frame 8 is relatively high and reaches the point where the rubber limit block 26 is deformed, the excess gas in the support frame 8 will be discharged through the through hole 24, avoiding the rubber scraper connected to the lower surface of the support bar 23 from exerting excessive pressure on the protective film body, thereby causing damage to the protective film body. The lower surface of the support bar 23 and the lower surface of the exhaust scraper 6 are both provided with rubber scrapers, and the two exhaust scrapers 6 and the two support bars 23 are all arranged in an "I" shape. The highest point of the fixed roller 9 is on the upper surface of the support seat 1 where the support bar 23 and the exhaust scraper 6 are located.The highest point of the fixed roller 9 is coplanar with the highest point of the roller shaft below the primary pressure roller group 2 and the secondary pressure roller group 4. The support pipe frame 7 is connected to the support frame 8, which is convenient for conveying the gas in the piston tube 10 to the support frame 8 to increase the pressure in the support frame 8.

[0019] Embodiment 2: In order to solve the problem that the previous protective film laminating device is not provided with an auxiliary laminating structure, which is not conducive to the close contact between the protective film body and the base film, and bubbles are easily generated during subsequent laminating, the following technical solution is provided, specifically, an auxiliary laminating assembly is connected to the initial pressing roller group 2, and the auxiliary laminating assembly is also connected to the support seat 1.

[0020] The auxiliary pressing assembly includes a piston tube 13, a disc 19 and an exhaust hole 22. The two piston tubes 13 are arranged on the side of the support seat 1 at the position of the initial pressing roller group 2, and the interior of the piston tube 13 is seamlessly slidably connected with a piston disc 21. The upper surface axis of the piston disc 21 is connected to the lower end of the corresponding connecting rod 20, and the upper end axis of the connecting rod 20 is connected to the eccentric position of the disc 19. The disc 19 is coaxially fixedly connected to the end of the roller shaft above the initial pressing roller group 2. The lower end of the piston tube 13 is connected through the air guide pipe 18 and the air intake port 17, and the air intake port 17 is installed on the upper surface of the support seat 1. The piston tube 13 is also provided with an exhaust hole 22. When the initial pressing roller group 2 presses the protective film body and the bottom film, the initial pressing roller The roller shaft on group 2 will rotate, and then drive the disc 19 coaxially connected thereto to rotate. The connecting rod 20 connected to the eccentric position of the disc 19 will drive the piston disc 21 connected to its lower end to move up and down reciprocatingly. In the process of the up and down reciprocating movement of the piston disc 21, the air intake port 17 will continuously generate suction, thereby absorbing the air between the protective film body and the bottom film before the two are pressed together, thereby facilitating the adsorption of the two, which is beneficial to reduce the bubbles generated when the two are pressed together. One-way valves are provided at the exhaust hole 22, the connection position of the air guide pipe 18 and the piston tube 2 13, and the connection position of the air inlet hole 11 with the piston tube 1 10 and the air supply pipe 12. The air intake port 17 is trumpet-shaped and is provided on the feeding side of the initial pressing roller group 2.

[0021] A method for using a protective film laminating device, comprising: Step 1: Feed the protective film body and the base film from the position of the primary pressing roller group 2, and the two will be preliminarily pressed together after passing through the primary pressing roller group 2; Step 2: During the process of the initial pressing roller group 2 pressing the protective film body and the bottom film, the roller shaft thereon rotates, driving the disc 19 to rotate, so that the connecting rod 20 connected to the eccentric position shaft drives the piston disc 21 to move up and down reciprocatingly, and the air inlet 17 can continuously generate suction through the exhaust hole 22 and the one-way valve arranged at the connection position of the air guide pipe 18 and the piston tube 13. The suction force generated by the air inlet 17 absorbs the air between the protective film body and the bottom film before the two are pressed together, thereby generating negative pressure between the two, which helps the two to be closely attached to each other, and is conducive to the two being pressed together by the initial pressing roller group 2. In addition, it can also reduce the amount of bubbles generated when the two are pressed together; Step 3: All or part of the bubbles of the protective film body and the bottom film pressed by the primary pressing roller group 2 will be scraped off when passing through the exhaust scraper 6; Step 4: When the protective film body and the bottom film that have not been completely scraped off the bubbles after passing through the exhaust scraper 6 pass through the inspection roller 3, one end of the inspection roller 3 will move up according to the position of the bubbles. When the end of the inspection roller 3 moves up, the piston rod 14 of the end will move into the corresponding piston tube 10, thereby squeezing the air in the piston tube 10, so that the air in the piston tube 10 enters the support pipe rack 7 through the air supply pipe 12, and finally enters the support frame 8 to increase the pressure in the support frame 8. The increase in the pressure in the support frame 8 will cause the piston plate 25 to move downward, thereby driving the support bar 23 to move downward, thereby increasing the pressure between the rubber scraper connected to the lower surface of the support bar 23 and the protective film body; Step 5: When the protective film body and the bottom film pass through the support frame 8, the rubber strips underneath them completely scrape out bubbles, so that the finished product formed by the protective film body and the bottom film basically has no bubbles, thereby improving the aesthetics and facilitating sales.

[0022] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective film laminating device for preventing bubble generation, comprising a support seat (1), a bubble detection component, a secondary bubble scraping component and an auxiliary laminating component, characterized in that: The support seat (1) is provided with three mounting grooves penetrating the upper and lower surfaces thereof, and the mounting grooves at both ends are respectively bearing-mounted with a primary pressure roller group (2) and a secondary pressure roller group (4), and a bubble detection component is installed in the middle mounting groove, the bubble detection component is connected to a secondary bubble scraping component, and the secondary bubble scraping component is arranged between the bubble detection component and the secondary pressure roller group (4), an exhaust scraper (6) is arranged between the primary pressure roller group (2) and the bubble detection component, and the exhaust scraper (6) is supported on the upper surface of the support seat (1) through a support rod frame (5), and an auxiliary pressing component is connected to the primary pressure roller group (2), and the auxiliary pressing component is also connected to the support seat (1).

2. A protective film laminating device for preventing bubble generation according to claim 1, characterized in that: The bubble detection assembly comprises a test roller (3), a fixed roller (9), a piston tube (10) and a support block (16); the test roller (3) is mounted above the fixed roller (9), and the bearings at both ends of the fixed roller (9) are connected to the two sides of the middle mounting groove; the bearings at both ends of the test roller (3) pass through the corresponding support block (16), and the upper end of the support block (16) is fixedly connected to the corresponding piston rod (14); the upper end of the piston rod (14) is seamlessly slidably connected to the inner side of the lower end opening of the piston tube (10), and the upper end of the piston tube (10) is fixedly connected to the support seat (1); a spring (15) movably nested in the outer side of the piston rod (14) is arranged between the lower end opening of the piston tube (10) and the upper surface of the support block (16); and the support seat (1) is provided with an air inlet (11) that passes through the piston tube (10).

3. A protective film laminating device for preventing bubble generation according to claim 2, characterized in that: The secondary bubble scraping assembly comprises a support pipe rack (7), a support frame (8) and a rubber stopper (26); the support frame (8) is arranged between the inspection roller (3) and the re-pressing roller group (4), and the support frame (8) is fixed to the upper surface of the support seat (1) through the support pipe rack (7); the inner side of the lower surface of the support frame (8) is seamlessly connected with a piston plate (25), and the lower surface of the piston plate (25) is fixedly connected with a support bar (23); a rubber stopper (26) is arranged inside the support frame (8), and the rubber stopper (26) is arranged between the upper surface of the support bar (23) and the lower surface of the support frame (8); through holes (24) are evenly arranged within the height range of the support frame (8) where the rubber stopper (26) is located; the piston tube 1 (10) is connected to the support pipe rack (7) through the air supply pipe (12).

4. A protective film laminating device for preventing bubble generation according to claim 3, characterized in that: The lower surface of the support strip (23) and the lower surface of the exhaust scraper (6) are both provided with rubber scrapers, and the two exhaust scrapers (6) and the two support strips (23) are both arranged in an I-shape.

5. A protective film laminating device for preventing bubble generation according to claim 4, characterized in that: The highest point of the fixed roller (9) is located on the upper surface of the support seat (1) where the support bar (23) and the exhaust scraper (6) are located, and the highest point of the fixed roller (9) is coplanar with the highest point of the roller shaft below the initial pressure roller group (2) and the secondary pressure roller group (4).

6. A protective film laminating device for preventing bubble generation according to claim 5, characterized in that: The support pipe rack (7) is connected to the support frame (8) to facilitate the delivery of the gas in the piston tube 1 (10) to the support frame (8) to increase the pressure in the support frame (8).

7. A protective film laminating device for preventing bubble generation according to claim 6, characterized in that: The auxiliary pressing assembly comprises a second piston tube (13), a disc (19) and an exhaust hole (22). The two second piston tubes (13) are arranged on the side of the support seat (1) at the position of the initial pressure roller group (2), and the interior of the second piston tube (13) is seamlessly slidably connected with a piston disc (21). The upper surface of the piston disc (21) is axially connected to the lower end of the corresponding connecting rod (20), and the upper end of the connecting rod (20) is axially connected to the eccentric position of the disc (19). The disc (19) is coaxially fixedly connected to the end of the roller shaft above the initial pressure roller group (2). The lower end of the second piston tube (13) is connected through an air guide pipe (18) and an air intake port (17), and the air intake port (17) is installed on the upper surface of the support seat (1). The second piston tube (13) is also provided with an exhaust hole (22).

8. A protective film laminating device for preventing bubble generation according to claim 7, characterized in that: The exhaust hole (22), the position where the air guide tube (18) and the second piston tube (13) are connected, and the position where the air inlet hole (11) and the first piston tube (10) and the air delivery tube (12) are connected are all provided with one-way valves.

9. A protective film laminating device for preventing bubble generation according to claim 8, characterized in that: The air intake port (17) is trumpet-shaped and is arranged on the feeding side of the primary pressure roller group (2).

10. A method for using a protective film laminating device, characterized in that: Applied to the protective film laminating device for preventing bubble generation as claimed in claim 9, the method comprises: Step 1: feeding the protective film body and the base film from the position of the primary pressing roller group (2), and the two are initially pressed together after passing through the primary pressing roller group (2); Step 2: During the process of the initial pressing roller group (2) pressing the protective film body and the bottom film together, the roller shaft thereon rotates, driving the disc (19) to rotate, so that the connecting rod (20) connected to the eccentric position shaft drives the piston disc (21) to move up and down reciprocatingly, and the air inlet (17) can continuously generate suction through the exhaust hole (22) and the one-way valve provided at the connection position between the air guide pipe (18) and the second piston tube (13). The suction force generated by the air inlet (17) absorbs the air between the protective film body and the bottom film before the two are pressed together, thereby generating negative pressure between the two, which helps the two to be closely attached to each other, and thus facilitates the two to be pressed together by the initial pressing roller group (2). In addition, the amount of bubbles generated when the two are pressed together can be reduced; Step 3: When the protective film body and the bottom film pressed by the primary pressing roller group (2) pass through the exhaust scraper (6), all or part of the bubbles will be scraped off; Step 4: After the protective film body and the bottom film that have not been completely scraped off the bubbles after passing through the exhaust scraper (6) pass through the inspection roller (3), one end of the inspection roller (3) will move upwards according to the position of the bubbles. When the end of the inspection roller (3) moves upwards, the piston rod (14) at the end will move into the corresponding piston tube (10), thereby squeezing the air in the piston tube (10), so that the air in the piston tube (10) enters the support pipe frame (7) through the air supply pipe (12), and finally enters the support frame (8), so as to increase the pressure in the support frame (8). The increase in the pressure in the support frame (8) will cause the piston plate (25) to move downwards, thereby driving the support bar (23) to move downwards, thereby increasing the pressure between the rubber scraper connected to the lower surface of the support bar (23) and the protective film body; Step 5: When the protective film body and the bottom film pass through the support frame (8), the rubber strip below them completely scrapes away bubbles, so that the finished product formed by the protective film body and the bottom film basically does not have bubbles, thereby improving the aesthetics and facilitating sales.

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