Stable film pasting device convenient to use
By designing a guide rail and a cross roller limiting structure for the stable film applicator, combined with an elastic buffer layer, the problems of low efficiency, numerous air bubbles, and complex operation in traditional film application methods are solved, achieving efficient and stable film application results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN MISSFEEL CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional film application methods are inefficient, prone to air bubbles, have poor edge adhesion, and are difficult to guarantee positional accuracy. Existing film applicators are complex in structure, inconvenient to operate, and have poor stability.
A stable film applicator was designed, comprising a housing, a positioning seat, and a film application assembly. By utilizing guide rails and a cross-arranged roller limiting structure, combined with an elastic buffer layer, the film application is automated and precise, ensuring the smoothness and accuracy of the application process.
It improves the efficiency and quality of film application, reduces bubble formation, enhances the stability and versatility of the equipment during the film application process, simplifies the operation process, reduces difficulty, and increases the success rate.
Smart Images
Figure CN224225421U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of film applicator technology, and in particular discloses a convenient and stable film applicator. Background Technology
[0002] With the widespread use of smart mobile devices, screen protector application has become a common need. Traditional screen protector application methods mostly rely on manual labor, resulting in low efficiency, air bubbles, and poor edge adhesion. Furthermore, it's difficult to guarantee precise placement, leading to poor application results. While existing screen protector applicators have improved efficiency and effectiveness to some extent, they still suffer from drawbacks such as complex structures, inconvenient operation, and poor stability. For example, inaccurate positioning can cause screen protector misalignment, and poorly designed applicator components can affect the flatness of the applied screen protector. Therefore, there is an urgent need for a screen protector applicator that is simple in structure, easy to operate, and highly stable to meet users' demands for high-quality screen protector application. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a convenient and stable film applicator.
[0004] To achieve the above objectives, this utility model provides a convenient and stable film applicator, comprising a housing, a positioning seat installed within the housing, and a film applicator assembly reciprocatingly mounted on the housing. The film applicator assembly includes a support frame, a film applicator mounted on the support frame, and a limiting component mounted on the support frame and / or the film applicator. The limiting component has a first limiting unit and a second limiting unit. The first limiting unit is used to press against the housing in a vertical direction, and the second limiting unit is used to press against the housing in a horizontal direction. A guide rail is provided on the side wall of the housing. The limiting component abuts against the guide rail. The support frame reciprocates on the guide rail. The film applicator acts on an external protective film to affix the protective film to the display screen of the smart mobile terminal supported by the positioning seat.
[0005] The film applicator slides on the guide rail, and the limiting component ensures smooth movement, evenly pressing and flattening the film end face to prevent air bubbles and improve the application effect and efficiency. The positioning seat precisely fixes the smart mobile terminal, preventing the device from shifting during the application process and further ensuring the quality of the application. In practice, the smart mobile terminal is placed on the positioning seat, and the limiting component abuts against the guide rail on the side wall of the outer shell, pushing the film applicator to slide along the guide rail. During the sliding process, the film applicator rolls and flattens the film end face, making the operation simple and convenient, and effectively solving the problems of complex traditional film application operations and the tendency to produce air bubbles.
[0006] The positioning base includes a first housing, a first groove formed on the first housing, and a limiting member disposed on the first housing. The limiting member protrudes into the first groove. The first groove is used to accommodate a mobile smart terminal from the outside, and the limiting member is used to abut against the mobile smart terminal accommodated in the first groove.
[0007] The first slot provides precise placement space for the mobile smart terminal. A limiting component protrudes into the slot, firmly abutting the mobile smart terminal from the side, effectively limiting the device's shaking and displacement during the film application process, ensuring accurate film placement and improving the success rate. Simultaneously, this structure is adaptable to mobile smart terminals of various sizes, enhancing the applicator's versatility. In practice, the mobile smart terminal is first smoothly placed into the first slot, using the slot's contour for initial positioning. Then, the limiting component tightly adheres to the side of the device, limiting and fixing the device from multiple directions, ensuring stable placement within the first slot. This provides a stable foundation for subsequent film application, simplifying the process and reducing the difficulty of film application.
[0008] The first limiting unit is a first roller that is rotatably set, and the second limiting unit is a second roller that is rotatably set. The first rollers are respectively provided on both sides of the film-applying component, and the film-applying component reciprocates in the guide track via the first rollers. There are two second rollers, and the two second rollers respectively roll and abut against the left and right sides of the outer shell.
[0009] The rotation axis of the first roller is arranged to intersect with the rotation axis of the second roller.
[0010] The first rollers are positioned at both ends of the film applicator, allowing it to slide smoothly and flexibly back and forth within the guide rail, ensuring a stable and efficient rolling and flattening process. The second roller is positioned on the other side of the guide rail, working in conjunction with the first roller to guide and limit the film applicator from different directions, preventing it from shifting or wobbling during sliding, ensuring uniformity and accuracy of film flattening, and improving the quality of the film application. Furthermore, the intersecting rotation axes of the first and second rollers further optimize the force distribution and movement trajectory of the film applicator, enhancing the stability and reliability of the limiting components.
[0011] The film-applying component includes a first main shaft rotatably mounted on a support frame. The first rollers are provided in two sets, with two rollers in each set. The first set of first rollers is mounted on the support frame and rotates to press against the guide rails on the left and right sides of the outer casing. The second set of first rollers is mounted on both ends of the first main shaft. The guide rails are provided with a clearance notch. Rotating the first set of first rollers causes the support frame to move closer to the guide rails, and the second set of first rollers slides into the guide rails through the clearance notch. The two sets of first rollers together drive the first main shaft on the support frame to roll on the guide rails to press against and flatten the film-applying end face of the smart mobile terminal placed on the positioning seat.
[0012] The synergistic effect of the two sets of first rollers makes the sliding of the film applicator on the guide rail smoother and more controllable. The first set of rollers drives the carrier frame closer to the guide rail, while the second set of rollers slides into the rail through the clearance notch, realizing the phased positioning and movement of the film applicator and enhancing structural stability. At the same time, the rotation setting of the first spindle ensures more uniform pressure and flattening of the film end face, effectively eliminating air bubbles and improving the film application quality. In specific implementation, the smart mobile terminal is first placed on the positioning seat, and the carrier frame is pushed to make the first set of first rollers roll along the guide rail. When the carrier frame approaches a specific position on the guide rail, the second set of first rollers aligns with the clearance notch and slides into the guide rail. At this time, the two sets of rollers work together to drive the first spindle on the carrier frame to slide smoothly. During the rotation of the first spindle, the first spindle applies uniform pressure to the film end face, completing the precise film application operation. The whole process is simple and efficient, reducing the difficulty of film application and improving the success rate of film application.
[0013] The outer shell has a second groove for accommodating the positioning seat, and the outer shell has a first clearance hole opened from the bottom surface of the second groove; the bottom surface of the first groove of the positioning seat has a second clearance hole, and the first clearance hole and the second clearance hole are connected.
[0014] The second groove of the outer shell provides a precise installation space for the positioning seat, ensuring that the positioning seat is set up stably; the first clearance hole and the second clearance hole of the positioning seat are connected to form a passage, which facilitates the exposure of the bottom structure of the smart mobile terminal, such as the charging interface and buttons, and avoids the device being blocked during the film application process.
[0015] The positioning base also has a clearance groove, which is connected to the first groove. Users can remove their phones through the clearance groove, which provides a convenient way to take out the phone. After the screen protector is applied, the phone can be easily removed by flipping it over using the clearance groove, avoiding damage to the screen protector from direct prying and reducing the risk of device damage due to improper handling.
[0016] The roller is a rotating bearing.
[0017] Rotary bearings feature a low coefficient of friction and high rotational precision, allowing the film applicator to slide more smoothly within the guide rail, reducing jamming and ensuring a stable and efficient film applicator flattening process. Simultaneously, the bearings' significant wear resistance effectively extends the service life of the limiting components and reduces wear and tear. Furthermore, the stable rotational characteristics of the bearings ensure uniform pressure applied by the film applicator to the film applicator end face, further improving the film applicator quality and reducing air bubble formation.
[0018] The first spindle includes a first shaft body and an elastic buffer layer disposed on the outside of the first shaft body.
[0019] The elastic buffer layer, through its own deformation capability, can adaptively conform to the surface curvature of the smart mobile terminal (such as the edge of a curved screen) when the film is pressed flat, avoiding rigid compression that could cause the film to wrinkle or form air bubbles. At the same time, the elastic force of the buffer layer can evenly distribute the pressure, ensuring that the air between the film and the screen is fully expelled. In addition, the buffer layer material (such as silicone, sponge, etc.) has wear-resistant and anti-slip properties, which can not only protect the screen from scratches, but also prevent the film from shifting during rolling, thus improving the success rate of film application.
[0020] The outer shell is provided with a positioning post, and the first groove is recessed from the top surface of the positioning seat. The positioning seat is provided with multiple sets of positioning holes, which are recessed from the bottom surface of the positioning seat. The positioning seat is inserted into the positioning post of the outer shell through the positioning holes.
[0021] The insertion and engagement of the positioning pin and the positioning hole form a rigid positioning constraint, which ensures that the positioning seat is accurately positioned in the second groove of the outer shell without displacement or shaking. This guarantees the relative positional accuracy between the first groove and other components on the outer shell (such as guide rails and clearance holes), thereby improving the placement stability of the smart mobile terminal and the accuracy of film flattening during the film application process. At the same time, this structure simplifies the assembly process. Users can quickly complete the installation of the positioning seat by aligning the positioning pin and the positioning hole without additional tools, thus improving ease of use.
[0022] The beneficial effects of this utility model are as follows: Through the coordinated design of the outer shell, positioning seat, and film application assembly, the film application process is automated and precise using a mechanical structure. The first groove of the positioning seat and the limiting component form a three-dimensional positioning space, which, combined with the insertion structure of the positioning post and positioning hole in the outer shell, achieves rigid fixation of the smart mobile terminal. The film application assembly, guided by the limiting of the rotating bearing and the cross-axis rollers, combined with the design of two sets of rollers sliding into the guide rail in stages, ensures that the first main shaft slides smoothly along the preset trajectory. The elastic buffer layer on the outside of the main shaft adapts to the screen curvature through deformation, evenly expelling air between the film and the screen through rolling friction. The beneficial effects of this design are significant: the precise positioning structure prevents equipment displacement, the staged rolling flattening mechanism eliminates air bubbles, the elastic buffer layer adapts to various screen shapes, the bearing rollers improve sliding smoothness, and the clearance groove and avoidance hole design balances operational convenience and equipment functionality. Overall, it achieves a comprehensive improvement in film application efficiency, quality, and versatility, effectively solving the operational difficulties of traditional manual film application. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the positioning seat of this utility model;
[0025] Figure 3This is a structural schematic diagram of the positioning seat of this utility model from another perspective;
[0026] Figure 4 This is a schematic diagram of the outer shell and film-applying assembly of this utility model;
[0027] Figure 5 This is an exploded view of the outer shell and film-applying assembly of this utility model;
[0028] Figure 6 for Figure 5 A magnified structural diagram of part A in the middle;
[0029] Figure 7 This is a schematic diagram of the structure of the first main shaft of this utility model.
[0030] The reference numerals in the figures include:
[0031] 1. Outer shell; 2. Positioning seat; 3. Film application assembly; 4. Film application component; 5. Limiting assembly; 6. Guide rail; 7. First housing; 8. First groove; 9. Limiting component; 11. First roller; 12. Second roller; 13. Support frame; 14. First spindle; 15. Clearance notch; 16. Second groove; 17. First clearance hole; 18. Second clearance hole; 19. Clearance groove; 21. First shaft; 22. Elastic buffer layer; 23. Positioning post; 24. Positioning hole. Detailed Implementation
[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.
[0033] Please see Figures 1 to 7 As shown, this utility model discloses a convenient and stable film applicator, comprising a housing 1, a positioning seat 2 installed inside the housing 1, and a film applicator assembly 3 reciprocatingly mounted on the housing 1. The film applicator assembly 3 includes a support frame 13, a film applicator 4 mounted on the support frame 13, and a limiting assembly 5 mounted on the support frame 13 and / or the film applicator 4. The limiting assembly 5 has a first limiting unit and a second limiting unit. The first limiting unit is used to press against the housing 1 in the vertical direction, and the second limiting unit is used to press against the housing 1 in the horizontal direction. A guide rail 6 is provided on the side wall of the housing 1. The limiting assembly 5 abuts against the guide rail 6. The support frame 13 reciprocates on the guide rail 6. The film applicator 4 acts on the external protective film so that the protective film is applied to the display screen of the smart mobile terminal supported by the positioning seat 2.
[0034] The film applicator 4 of the film applicator assembly 3 slides on the guide rail 6, and the limiting component 5 ensures smooth movement, evenly pressing and flattening the film end face to avoid air bubbles, thus improving the film application effect and efficiency. The positioning seat 2 can accurately fix the smart mobile terminal and prevent the device from shifting during the film application process, further ensuring the quality of the film application. In specific implementation, the smart mobile terminal is placed on the positioning seat 2 for positioning. The limiting component 5 abuts against the guide rail 6 on the side wall of the outer shell 1, pushing the film applicator 4 to slide along the guide rail 6. During the sliding process, the film applicator 4 rolls and flattens the film end face. The operation is simple and convenient, effectively solving the problems of complex operation and easy air bubble formation in traditional film application.
[0035] The positioning base 2 includes a first housing 7, a first groove 8 formed on the first housing 7, and a limiting member 9 disposed on the first housing 7. The limiting member 9 protrudes into the first groove 8. The first groove 8 is used to accommodate a mobile smart terminal from the outside, and the limiting member 9 is used to abut against the mobile smart terminal accommodated in the first groove 8.
[0036] The first groove 8 provides a precise placement space for the mobile smart terminal. The limiting member 9 protrudes into the groove and firmly abuts against the mobile smart terminal from the side, effectively limiting the shaking and displacement of the device during the film application process, ensuring accurate film application position, and improving the success rate of film application. At the same time, this structure is compatible with mobile smart terminals of various sizes, enhancing the versatility of the film applicator. In specific implementation, the mobile smart terminal is first placed smoothly into the first groove 8, and the groove contour is used for initial positioning. Then, the limiting member 9 fits tightly against the side of the device, limiting and fixing the device from multiple directions, so that the device is stably placed in the first groove 8. This provides a stable foundation for the subsequent film application operation of the film application component 3, simplifies the film application process, and reduces the difficulty of film application.
[0037] The first limiting unit is a first roller 11 that is rotatably set, and the second limiting unit is a second roller 12 that is rotatably set. The first roller 11 is provided on both sides of the film-applying component 4, and the film-applying component 4 reciprocates in the guide rail 6 via the first roller 11. There are two second rollers 12, and the two second rollers 12 roll and abut against the left and right sides of the outer shell 1 respectively.
[0038] The rotation axis of the first roller 11 is intersected with the rotation axis of the second roller 12.
[0039] The first roller 11 is located at both ends of the film applicator 4, allowing it to slide smoothly and flexibly back and forth within the guide rail 6, ensuring a stable and efficient rolling and flattening process for the film applicator. The second roller 12 is rolled on the other side of the guide rail 6, cooperating with the first roller 11 to limit and guide the film applicator 4 from different directions, preventing it from shifting or shaking during sliding, ensuring the uniformity and accuracy of the film applicator, and improving the quality of the film applicator. Furthermore, the cross-rotation axes of the first roller 11 and the second roller 12 further optimize the force distribution and movement trajectory of the film applicator 4, enhancing the stability and reliability of the limiting assembly 5.
[0040] The film-applying component 4 includes a first main shaft 14 rotatably mounted on a support frame 13. The first rollers 11 are provided in two sets, with each set containing two first rollers 11. The first set of first rollers 11 is mounted on the support frame 13 and rotates to press against the guide rails 6 on the left and right sides of the outer casing 1. The second set of first rollers 11 is mounted on both ends of the first main shaft 14. The guide rail 6 is provided with an avoidance notch 15. Rotating the first set of first rollers 11 causes the support frame 13 to move closer to the guide rail 6. The second set of first rollers 11 slides into the guide rail 6 through the avoidance notch 15. The two sets of first rollers 11 together drive the first main shaft 14 on the support frame 13 to roll on the guide rail 6 to press against and flatten the film-applying end face of the smart mobile terminal placed on the positioning seat 2.
[0041] The synergistic effect of the two sets of first rollers 11 makes the sliding of the film applicator 4 on the guide rail 6 more stable and controllable. The first set of rollers drives the support frame 13 closer to the guide rail 6, and the second set of rollers slides into the rail through the clearance notch 15, realizing the phased positioning and movement of the film applicator 4 and enhancing structural stability. At the same time, the rotation setting of the first spindle 14 ensures more uniform pressure and flattening of the film end face, effectively eliminating air bubbles and improving the film application quality. In specific implementation, the smart mobile terminal is first placed on the positioning seat 2, and the support frame 13 is pushed to make the first set of first rollers 11 roll along the guide rail 6. When the support frame 13 is close to a specific position on the guide rail 6, the second set of first rollers 11 aligns with the clearance notch 15 and slides into the guide rail 6. At this time, the two sets of rollers work together to drive the first spindle 14 on the support frame 13 to slide smoothly. During the rotation, the first spindle 14 applies uniform pressure to the film end face, completing the precise film application operation. The whole process is simple and efficient, reducing the difficulty of film application and improving the success rate of film application.
[0042] The outer shell 1 has a second groove 16 for accommodating the positioning seat 2, and the outer shell 1 has a first clearance hole 17 opened from the bottom surface of the second groove 16; the bottom surface of the first groove 8 of the positioning seat 2 has a second clearance hole 18, and the first clearance hole 17 and the second clearance hole 18 are connected.
[0043] The second groove 16 of the outer shell 1 provides a precise installation space for the positioning seat 2, ensuring that the positioning seat 2 is set up stably; the first clearance hole 17 is connected to the second clearance hole 18 of the positioning seat 2 to form a passage, which facilitates the exposure of the bottom structure of the smart mobile terminal, such as the charging interface and buttons, and avoids the device being blocked during the film application process.
[0044] The positioning base 2 is also provided with a clearance groove 19, which is connected to the first groove 8. The user can take out the mobile phone through the clearance groove 19. The clearance groove 19 is connected to the first groove 8, providing the user with a convenient way to take out the mobile phone. After the screen protector is applied, the user can easily take it out by flipping the phone and using the clearance groove 19, avoiding damage to the screen protector caused by direct prying, and reducing the risk of device bumps caused by improper handling. The user can take out the mobile phone through the clearance groove 19.
[0045] The roller is a rotating bearing.
[0046] The rotating bearing has the characteristics of low friction coefficient and high rotational precision, which makes the sliding of the film applicator 4 within the guide rail 6 smoother and reduces jamming, ensuring a stable and efficient film applicator flattening process. At the same time, the bearing has significant wear resistance, which can effectively extend the service life of the limiting component 5 and reduce wear and tear. In addition, the stable rotational characteristics of the bearing can ensure that the pressure applied by the film applicator 4 to the film applicator end face is uniform, further improving the film applicator quality and reducing the generation of air bubbles.
[0047] The first spindle 14 includes a first shaft body 21 and an elastic buffer layer 22 disposed on the outside of the first shaft body 21.
[0048] The elastic buffer layer 22, through its own deformation capability, can adaptively conform to the surface curvature of the smart mobile terminal (such as the edge of a curved screen) when it is pressed against and flattened, avoiding the wrinkling or air bubbles caused by rigid compression. At the same time, the elastic force of the buffer layer can evenly distribute the pressure, ensuring that the air between the film and the screen is fully expelled. In addition, the buffer layer material (such as silicone, sponge, etc.) has wear-resistant and anti-slip properties, which can protect the screen from scratches and prevent the film from shifting during rolling, thus improving the success rate of film application.
[0049] The outer shell 1 is provided with a positioning post 23, the first groove 8 is recessed from the top surface of the positioning seat 2, the positioning seat 2 is provided with multiple sets of positioning holes 24, the positioning holes 24 are recessed from the bottom surface of the positioning seat 2, and the positioning seat 2 is inserted into the positioning post 23 of the outer shell 1 through the positioning holes 24.
[0050] The insertion and engagement of the positioning post 23 and the positioning hole 24 form a rigid positioning constraint, which ensures that the positioning seat 2 is accurately positioned in the second groove 16 of the outer shell 1 without displacement or shaking. This ensures the relative positional accuracy of the first groove 8 and other components on the outer shell 1 (such as the guide rail 6 and the clearance hole), thereby improving the placement stability of the smart mobile terminal and the accuracy of the film flattening during the film application process. At the same time, this structure simplifies the assembly process. Users can quickly complete the installation of the positioning seat 2 by aligning the positioning post 23 and the positioning hole 24 without additional tools, thus improving ease of use.
[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A convenient and stable film applicator, characterized in that: The device includes an outer shell (1), a positioning seat (2) installed inside the outer shell (1), and a film-applying assembly (3) reciprocatingly mounted on the outer shell (1). The film-applying assembly (3) includes a support frame (13), a film-applying component (4) mounted on the support frame (13), and a limiting assembly (5) mounted on the support frame (13) and / or the film-applying component (4). The limiting assembly (5) has a first limiting unit and a second limiting unit. The first limiting unit is used to press against the outer shell (1) in the vertical direction, and the second limiting unit is used to press against the outer shell (1) in the horizontal direction. The side wall of the outer shell (1) is provided with a guide rail (6). The limiting assembly (5) abuts against the guide rail (6). The support frame (13) reciprocates on the guide rail (6). The film-applying component (4) acts on the external protective film so that the protective film is applied to the display screen of the smart mobile terminal carried by the positioning seat (2).
2. The convenient and stable film applicator according to claim 1, characterized in that: The positioning base (2) includes a first housing (7), a first groove (8) formed on the first housing (7), and a limiting member (9) provided on the first housing (7). The limiting member (9) protrudes into the first groove (8). The first groove (8) is used to accommodate a mobile smart terminal from the outside, and the limiting member (9) is used to abut against the mobile smart terminal accommodated in the first groove (8).
3. The convenient and stable film applicator according to claim 1, characterized in that: The first limiting unit is a first roller (11) that is rotatably set, and the second limiting unit is a second roller (12) that is rotatably set. The first roller (11) is provided on both sides of the film-applying component (4), and the film-applying component (4) rolls back and forth in the guide rail (6) via the first roller (11). There are two second rollers (12), and the two second rollers (12) roll and abut against the left and right sides of the outer shell (1) respectively.
4. The convenient and stable film applicator according to claim 3, characterized in that: The rotation axis of the first roller (11) is intersected with the rotation axis of the second roller (12).
5. A convenient and stable film applicator according to claim 3, characterized in that: The film-applying component (4) includes a first main shaft (14) rotatably mounted on a support frame (13). The first rollers (11) are provided in two sets, with each set containing two first rollers (11). The first set of first rollers (11) is mounted on the support frame (13) and rotates to press against the guide rails (6) on the left and right sides of the outer shell (1). The second set of first rollers (11) is mounted on both ends of the first main shaft (14). The guide rail (6) is provided with an avoidance notch (15). Rotating the first set of first rollers (11) drives the support frame (13) to move closer to the guide rail (6). The second set of first rollers (11) slides into the guide rail (6) through the avoidance notch (15) of the guide rail (6). The two sets of first rollers (11) together drive the first main shaft (14) on the support frame (13) to roll on the guide rail (6) to press against and flatten the film-applying end face of the smart mobile terminal placed on the positioning seat (2).
6. The convenient and stable film applicator according to claim 1, characterized in that: The outer shell (1) has a second groove (16) for accommodating the positioning seat (2), and the outer shell (1) has a first clearance hole (17) opened from the bottom surface of the second groove (16); the bottom surface of the first groove (8) of the positioning seat (2) has a second clearance hole (18), and the first clearance hole (17) and the second clearance hole (18) are connected.
7. The convenient and stable film applicator according to claim 1, characterized in that: The positioning seat (2) is also provided with a clearance groove (19), which is connected to the first groove (8).
8. A convenient and stable film applicator according to claim 3, characterized in that: The roller is a rotating bearing.
9. A convenient and stable film applicator according to claim 5, characterized in that: The first spindle (14) includes a first shaft body (21) and an elastic buffer layer (22) disposed on the outside of the first shaft body (21).
10. A convenient and stable film applicator according to claim 2, characterized in that: The outer shell (1) is provided with a positioning post (23), the first groove (8) is recessed from the top surface of the positioning seat (2), the positioning seat (2) is provided with multiple sets of positioning holes (24), the positioning holes (24) are recessed from the bottom surface of the positioning seat (2), and the positioning seat (2) is inserted into the positioning post (23) of the outer shell (1) through the positioning holes (24).