A film pasting device and a film pasting assembly

Abstract

The utility model relates to electronic equipment fittings technical field, especially a kind of film pasting device and film pasting subassembly, film pasting device includes main body, main body includes bottom surface and side wall, bottom surface and side wall are enclosed to form accommodating groove, bottom surface is equipped with operating port;Accommodating groove length direction is defined as first direction, accommodating groove width direction is second direction;Operating port is arranged along first direction, side wall includes two outer wall surfaces arranged along first direction, in second direction, the distance of operating port to one outer wall surface is less than the distance to another outer wall surface, and asymmetric layout is formed.The outer wall surface of operating port closer to side wall side makes the area corresponding to operating port between protective film and screen, its exhaust path is relatively shorter, and resistance is smaller, gas is discharged from here to the side of another outer wall surface away from operating port, forms orderly directional exhaust path, avoids gas to be wrapped in middle or disorder area, to significantly reduce bubble formation, improve film pasting flatness and fitting quality.

Description

Technical Field

[0001] This utility model relates to the field of electronic device accessories technology, and in particular to a film application device and film application assembly. Background Technology

[0002] To better protect the screens of electronic devices such as mobile phones and tablets, screen protectors are typically applied using screen protector application devices to prevent damage from scratches and impacts. However, when using existing screen protector application devices, it is usually necessary to press the screen protector to expel air between it and the screen during the application process. However, the disordered expulsion of air can easily lead to air bubbles becoming trapped in localized areas between the screen protector and the screen, thus reducing the quality of the application. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a film application device and a film application assembly.

[0004] The present invention provides a film-applying device to solve the technical problem. The film-applying device includes a main body, the main body including a bottom surface and a side wall disposed on one side of the bottom surface, the bottom surface and the side wall forming a receiving groove, the bottom surface having an operating opening that penetrates the bottom surface and communicates with the receiving groove; the length direction of the receiving groove is defined as a first direction, and the width direction of the receiving groove is defined as a second direction; the operating opening is disposed along the first direction, and the side wall includes two outer wall surfaces disposed along the first direction; in the second direction, the distance from the operating opening to one of the outer wall surfaces is less than the distance to the other outer wall surface.

[0005] Preferably, the outer wall surface that is relatively close to the operating port is defined as the first wall surface, and in the second direction, the distance from the operating port to the first wall surface is 0.

[0006] Preferably, the outer wall surface that is relatively close to the operating port is defined as the first wall surface, and the side of the operating port near the first wall surface is defined as the first groove surface; in the second direction, the distance from the first groove surface to the first wall surface is between 3mm and 25mm.

[0007] Preferably, in the second direction, the width of the operating port is between 3 mm and 30 mm.

[0008] Preferably, in the first direction, the ratio of the length of the operating port to the length of the receiving groove is between 0.2 and 0.8.

[0009] Preferably, the operating port includes a straight segment and two arc segments, with the two arc segments located on both sides of the straight segment.

[0010] Preferably, the sidewall has a pull-out groove at one end in the first direction, and the bottom surface has a limiting member at at least one end in the first direction.

[0011] To solve the above-mentioned technical problems, this utility model provides another technical solution as follows: a film-applying assembly, the film-applying assembly including the film-applying device and the protective film assembly described above, the protective film assembly being disposed on the film-applying device.

[0012] Preferably, the protective film assembly includes a positioning film, a protective film, and a release film. The positioning film, the protective film, and the release film are arranged sequentially in a direction away from the bottom surface. An adhesive layer is provided on the side of the positioning film away from the bottom surface. A pull strip is connected to the release film. The positioning film has a notch on the side corresponding to the operating port.

[0013] Preferably, there are two notches, which are spaced apart, and the area of ​​the positioning membrane between the two notches is at least partially exposed to the operating port.

[0014] Compared with the prior art, the film application device and film application assembly provided by this utility model have the following beneficial effects:

[0015] 1. This utility model provides a screen protector application device, which includes a main body, a bottom surface, and a side wall disposed on one side of the bottom surface. The bottom surface and the side wall enclose a receiving groove. An operation port is provided on the bottom surface, penetrating the bottom surface and communicating with the receiving groove. The length direction of the receiving groove is defined as a first direction, and the width direction of the receiving groove is defined as a second direction. The operation port is disposed along the first direction, and the side wall includes two outer wall surfaces disposed along the first direction. In the second direction, the distance from the operation port to one of the outer wall surfaces is less than the distance to the other outer wall surface. The distance from the operation port to one of the outer wall surfaces in the second direction is less than the distance to the other outer wall surface, forming an asymmetrical layout. During the screen protector application process, because the operation port is closer to the outer wall surface on one side of the side wall, the area between the protective film and the screen corresponding to the operation port has a relatively short exhaust path and low resistance, forming a low-resistance exhaust starting area. When the user applies pressure from the operation port, the gas in this area is squeezed and mainly diffuses and is discharged along the outer wall surface closer to the operation port (low resistance side) to the outer wall surface farther from the operation port (high resistance side). This gradual venting method, progressing from the low-resistance side to the high-resistance side, creates an orderly and directional venting path, effectively reducing air bubble formation and improving the flatness and adhesion quality of the film. Furthermore, because the operating port is positioned along the first direction (length), the protective film gradually adheres to the screen along the second direction (width). Since the width dimension is smaller than the length dimension, the adhesion path is shorter, facilitating complete air expulsion. The offset position of the operating port allows air to gradually escape from the side closer to the outer wall surface to the other side, avoiding the problem of disordered air bubble accumulation caused by traditional horizontal venting in the middle, thus improving the film application effect.

[0016] 2. In this embodiment of the invention, the outer wall surface with a relatively small distance from the operating port is defined as the first wall surface. In the second direction, the distance from the operating port to the first wall surface is 0. When the distance from the operating port to the first wall surface is 0 in the second direction, it means that one edge of the operating port is flush with the first wall surface, forming an opening. The user can operate smoothly and without obstruction at the opening. At this time, the area where the user presses the protective film through the operating port will be strictly limited to the side close to the first wall surface, and the starting point of the pressing force is aligned with the near end of the gas discharge. This structure can force the gas to be discharged preferentially from the side closest to the first wall surface, avoiding disorderly diffusion of gas in other directions due to the displacement of the operating port position. When pressing, the gas can only be discharged gradually along the single path from the first wall surface through the operating port to the other side, reducing the possibility of air bubbles being trapped from the source. This is especially suitable for scenarios with high requirements for exhaust accuracy, such as curved screens and screen protectors for narrow-bezel devices.

[0017] 3. In this embodiment of the invention, the outer wall surface that is relatively close to the operating port is defined as the first wall surface, and the side of the operating port near the first wall surface is defined as the first groove surface. In the second direction, the distance from the first groove surface to the first wall surface is between 3mm and 25mm. When the distance from the first groove surface to the first wall surface is between 3mm and 25mm in the second direction, it means that the operating port is completely located in the bottom area and no opening is formed at the first wall surface. This still allows the gas to be guided to diffuse and be discharged along the outer wall surface that is closer to the operating port to the outer wall surface that is farther away from the operating port, thus taking into account structural strength, ease of operation, and exhaust efficiency.

[0018] 4. In the second direction provided in this embodiment of the utility model, the width of the operating opening is between 3mm and 30mm. The operating opening width is limited to between 3mm and 30mm. The lower limit of 3mm ensures that fingers or tools can be inserted into the operating opening to contact the protective film, meeting basic pressing requirements; the upper limit of 30mm avoids an excessively wide operating opening that would lead to a dispersed pressing area, preventing disordered air release due to simultaneous pressing of an excessively wide area, and also reducing the offset of the protective film caused by uneven force during pressing. The width of the operating opening can be specifically set according to the size of the electronic device. A smaller width is suitable for small-screen devices such as mobile phones, allowing for more precise air release; a larger width is used for large-screen devices such as large-screen mobile phones or tablets, covering a wider area, thereby meeting the film application needs of electronic devices of different sizes.

[0019] 5. In the first direction provided in this embodiment of the utility model, the ratio of the length of the operating port to the length of the receiving groove is between 0.2 and 0.8. By limiting the ratio of the length of the operating port to the length of the receiving groove to between 0.2 and 0.8, the coverage range of the operating port is optimized. The minimum ratio of 0.2 ensures that the operating port is long enough, allowing the user to have sufficient operating area and avoiding the formation of edge bubbles due to the operating port being too short; the maximum ratio of 0.8 prevents the operating port from being too long, so as not to affect the structural stability of the device or occupy too much space. A reasonable length ratio can reduce the amount of material used, reduce manufacturing costs, and maintain the stability of the structure.

[0020] 6. The operating port provided in this embodiment of the utility model includes a straight segment and two arc-shaped segments, with the two arc-shaped segments located on both sides of the straight segment. The straight segment ensures a linear pressing path along the first direction, so that after pressing, a low-resistance exhaust starting area is formed along the first direction near one side of the outer wall, allowing gas to diffuse and be discharged evenly from that side to the outer wall side farther away from the operating port; the arc-shaped segments eliminate the sharp corners of the operating port, providing a buffer for fingers to enter the operating port for operation, and improving operational safety.

[0021] 7. In this embodiment of the invention, the sidewall is provided with a pull-out groove at one end in the first direction, and the bottom surface is provided with a limiting member at at least one end in the first direction. The pull-out groove provides a pull-out space, making it convenient for the user to pull the pull strip through the pull-out groove to peel off the release film. The bottom surface is provided with a limiting member at at least one end in the first direction, which is used to fix the protective film assembly when applying the film, ensuring that the protective film can be accurately attached to the screen.

[0022] 8. The film-applying assembly provided in this embodiment of the present invention has the same beneficial effects as the film-applying device described above, and will not be repeated here.

[0023] 9. The protective film assembly provided in this embodiment includes a positioning film, a protective film, and a release film. The positioning film, protective film, and release film are arranged sequentially in a direction away from the bottom surface. An adhesive layer is provided on the side of the positioning film away from the bottom surface, and a pull strip is connected to the release film. The positioning film has a notch on the side corresponding to the operation port. The adhesive layer on the side of the positioning film away from the bottom shell can fix the protective film assembly and prevent the position of the protective film assembly from shifting, affecting the film application effect. The pull strip connected to the release film makes it easier and more convenient to remove the release film. Because the positioning film has a notch on the side corresponding to the operation port, the notch is located on the side closer to the operation port and there is no adhesive layer at the notch. The protective film corresponding to the notch will first contact the screen and adhere to the screen due to the reduced adhesion, thereby generating an adhesion force. From the side closer to the operation port, the entire protective film is sequentially and orderly adhered to the side away from the operation port, and air can be smoothly discharged without generating air bubbles.

[0024] 10. In this embodiment of the invention, two notches are provided, spaced apart. The area of ​​the positioning film between the two notches is at least partially exposed to the operating port. The spacing between the two notches makes the process of the protective film gradually adhering from the side closer to the operating port to the side farther away from the operating port more uniform, avoiding oblique adhering paths that would prevent smooth gas discharge. The area of ​​the positioning film between the two notches is at least partially exposed to the operating port, corresponding to the area where the user applies pressure, ensuring the accuracy of the pressure applied by the user, and assisting the protective film in adhering to the screen sequentially from the side closer to the operating port to the side farther away from the operating port. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a three-dimensional structural schematic diagram of the film-applying device provided in the first embodiment of this utility model.

[0027] Figure 2 This is a schematic diagram of the planar structure of the film-applying device provided in the first embodiment of this utility model.

[0028] Figure 3 This is a three-dimensional structural schematic diagram of the film-applying device provided in the second embodiment of this utility model.

[0029] Figure 4 This is a schematic diagram of the planar structure of the film-applying device provided in the second embodiment of this utility model.

[0030] Figure 5 This is an exploded structural diagram of the film-applying assembly provided in the third embodiment of this utility model.

[0031] Figure 6 This is a cross-sectional structural diagram of the protective film assembly of the film application assembly provided in the third embodiment of this utility model.

[0032] Figure 7 This is a structural block diagram of the film-applying assembly provided in the third embodiment of this utility model.

[0033] Explanation of reference numerals in the attached diagram:

[0034] 1. Film application device; 1a. Film application device; 10. Main body; 11. Bottom surface; 12. Side wall; 13. Receiving groove; 111. Operating port; 112. Limiting component; 121. Outer wall surface; 122. Pull-out groove; 1111. First groove surface; 1112. Straight section; 1113. Arc section; 1211. First wall surface; 100. Film application assembly; 20. Protective film assembly; 21. Positioning film; 22. Protective film; 23. Release film; 211. Adhesive layer; 212. Notch; 213. Limiting hole; 231. Pull strip. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0036] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0038] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0039] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0040] Please combine Figures 1 to 2 The first embodiment of this utility model provides a film application device 1, which includes a main body 10. The main body 10 includes a bottom surface 11 and a side wall 12 disposed on one side of the bottom surface 11. The bottom surface 11 and the side wall 12 enclose a receiving groove 13. The bottom surface 11 has an operation port 111, which penetrates the bottom surface 11 and communicates with the receiving groove 13. The length direction of the receiving groove 13 is defined as a first direction, and the width direction of the receiving groove 13 is defined as a second direction. The operation port 111 is disposed along the first direction, and the side wall 12 includes two outer wall surfaces 121 disposed along the first direction. In the second direction, the distance from the operation port 111 to one of the outer wall surfaces 121 is less than the distance to the other outer wall surface 121.

[0041] It should be noted that in the figure, the first direction is represented by the x-axis and the second direction is represented by the y-axis.

[0042] Understandably, the distance from the operating port 111 to one of the outer wall surfaces 121 in the second direction is less than the distance to the other outer wall surface 121, forming an asymmetrical layout. During the film application process, because the operating port 111 is closer to the outer wall surface 121 on the side wall 12, the area between the protective film and the screen corresponding to the operating port 111 has a relatively short exhaust path and low resistance, forming a low-resistance exhaust starting area. When the user applies pressure from the operating port 111, the gas in this area is compressed and mainly diffuses and is discharged along the side of the outer wall surface 121 closer to the operating port 111 (low-resistance side) towards the side of the other outer wall surface 121 farther from the operating port 111 (high-resistance side). This exhaust method, which gradually advances from the low-resistance side to the high-resistance side, forms an orderly and directional exhaust path, effectively reducing bubble formation and improving the flatness and adhesion quality of the film. Furthermore, because the operating port 111 is positioned along the first direction, i.e., the length direction, the protective film gradually adheres to the screen along the second direction, i.e., the width direction, during application. Since the width dimension is smaller than the length dimension, the adhesion path is shorter, which is more conducive to complete gas expulsion. Through the offset position of the operating port 111, gas is gradually expelled from the side closer to the outer wall surface 121 via the operating port 111 to the other side, avoiding the problem of disordered air venting in the traditional middle horizontal venting method that leads to air bubble accumulation, thus improving the film application effect.

[0043] It should be noted that, in actual application, the most effective way to vent air is to gradually expel the air between the electronic device screen and the protective film from one side of the film to the other. The side-biased layout of the operating port 111 matches this operational logic: the user applies force through the operating port 111, starting from one edge of the protective film and gradually pushing towards the other side, ensuring that air is continuously pushed away from the operating port 111 and completely expelled, reducing air trapping caused by inconsistent pressing direction. If the operating port 111 were located in the middle of the bottom surface 11, the pressure would easily disperse in all directions during pressing, requiring simultaneous control of venting in multiple directions, making the operation difficult. If the operating port 111 is positioned along the second direction and at one end of the bottom surface 11 in the first direction, the venting path needs to span the entire length of the protective film in the first direction; an excessively long venting path increases the probability of air bubbles forming.

[0044] Optionally, the bottom surface 11 and the side wall 12 disposed on one side of the bottom surface 11 can be integrally injection molded, or they can be separately molded and then assembled to form a film-applying device.

[0045] Please see Figure 2 Furthermore, the outer wall surface 121 that is relatively close to the operating port 111 is defined as the first wall surface 1211, and in the second direction, the distance from the operating port 111 to the first wall surface 1211 is 0.

[0046] Understandably, when the distance from the operating port 111 to the first wall surface 1211 is 0 in the second direction, it means that one edge of the operating port 111 is flush with the first wall surface 1211, forming an opening. Users can operate smoothly and without obstruction at this opening. In this case, the area where the user presses the protective film through the operating port 111 is strictly limited to the side closest to the first wall surface 1211, with the starting point of the pressing force aligned with the proximal end of the gas discharge. This structure forces the gas to preferentially discharge from the nearest first wall surface 1211, preventing disorderly diffusion of gas in other directions due to the offset position of the operating port 111. During pressing, the gas can only be discharged gradually along a single path from the first wall surface 1211 through the operating port 111 to the other side, reducing the possibility of air bubbles being trapped at the source. This is particularly suitable for scenarios requiring high exhaust precision, such as curved screens and screen protectors for narrow-bezel devices.

[0047] Please continue reading. Figure 2 Furthermore, in the second direction, the width of the operating port 111 is between 3mm and 30mm.

[0048] Understandably, the width of the operating port is defined as D1, where 3mm ≤ D1 ≤ 30mm. The width of the operating port 111 is limited to between 3mm and 30mm. The lower limit of 3mm ensures that fingers or tools can be inserted into the operating port 111 to contact the protective film, meeting basic pressing requirements. The upper limit of 30mm prevents the operating port 111 from being too wide, which would cause the pressing area to be dispersed and prevent disordered air venting due to simultaneous pressing of an excessively wide area. It also reduces the offset of the protective film caused by uneven force during pressing. The width of the operating port 111 can be specifically set according to the size of the electronic device. A smaller width is suitable for small-screen devices such as mobile phones, allowing for more precise air venting. A larger width is used for large-screen devices such as large-screen mobile phones or tablets, covering a wider area, thereby meeting the screen protector application needs of electronic devices of different sizes.

[0049] Please continue reading. Figure 2 Furthermore, in the first direction, the ratio of the length of the operating port 111 to the length of the receiving groove 13 is between 0.2 and 0.8.

[0050] Understandably, the length of the operating port 111 is defined as H1, and the length of the receiving groove 13 is defined as S1, with 0.2 ≤ H1 / S1 ≤ 0.8. By limiting the ratio of the length H1 of the operating port 111 to the length S1 of the receiving groove 13 to between 0.2 and 0.8, the coverage area of ​​the operating port 111 is optimized. A minimum ratio of 0.2 ensures that the operating port 111 is long enough, providing the user with sufficient operating area and preventing edge bubbles from forming due to the operating port 111 being too short; a maximum ratio of 0.8 prevents the operating port 111 from being too long, so as not to affect the structural stability of the device or occupy too much space. A reasonable length ratio can reduce material usage, lower manufacturing costs, and maintain structural stability.

[0051] Please combine Figure 1 and Figure 2 Furthermore, the operating port 111 includes a straight segment 1112 and two arc segments 1113, with the two arc segments 1113 located on both sides of the straight segment 1112.

[0052] Understandably, the straight segment 1112 ensures a linear pressing path along the first direction, so that after pressing, a low-resistance exhaust starting area is formed along the first direction near one side of the outer wall surface 121, allowing the gas to diffuse and be discharged evenly from that side to the side of the outer wall surface 121 that is farther away from the operating port 111; the arc segment 1113 eliminates the sharp corners of the operating port 111, providing a buffer for the finger to enter the operating port 111 for operation, and improving the safety of operation.

[0053] Please see Figure 1 Furthermore, the sidewall 12 is provided with a pull-out groove 122 at one end in the first direction, and the bottom surface 11 is provided with a limiting member 112 at at least one end in the first direction.

[0054] Understandably, the pull-out groove 122 provides a pull-out space, allowing the user to easily pull the release film strip through the pull-out groove 122 to remove the release film when applying it. The bottom surface 11 is provided with a limiting member 112 at at least one end in the first direction. The limiting member 112 is used to fix the protective film during application, ensuring that the protective film can be accurately attached to the screen.

[0055] Please combine Figures 3 to 4 The second embodiment of this utility model provides a film-applying device 1a, which differs from the film-applying device 1 of the first embodiment of this utility model in that: the outer wall surface 121, which is relatively close to the operation port 111, is defined as the first wall surface 1211, and the side of the operation port 111 near the first wall surface 1211 is defined as the first groove surface 1111; in the second direction, the distance from the first groove surface 1111 to the first wall surface 1211 is between 3mm and 25mm.

[0056] Understandably, the distance from the first groove surface 1111 to the first wall surface 1211 is defined as L2, where 3mm ≤ L2 ≤ 25mm. When the distance from the first groove surface 1111 to the first wall surface 1211 is between 3mm and 25mm in the second direction, it means that the operating port 111 is completely located within the area of ​​the bottom surface 11 and does not form an opening at the first wall surface 121. This allows the gas to be guided to diffuse and be discharged along the side of the outer wall surface 121 that is closer to the operating port 111 to the side of the other outer wall surface 121 that is farther away from the operating port 111, thus taking into account structural strength, ease of operation, and exhaust efficiency.

[0057] Please combine Figures 5 to 7The third embodiment of this utility model provides a film application assembly 100, which includes a film application device 1 of the first embodiment or a film application device 1a of the second embodiment of this utility model, and a protective film assembly 20, which is disposed on the film application device 1.

[0058] Understandably, the film application assembly 100 has the same beneficial effects as the film application device 1 of the first or second embodiment of this utility model, and will not be described again here.

[0059] Please combine Figure 5 and Figure 6 Furthermore, the protective film assembly 20 includes a positioning film 21, a protective film 22, and a release film 23. The positioning film 21, the protective film 22, and the release film 23 are arranged sequentially in a direction away from the bottom surface 11. An adhesive layer 211 is provided on the side of the positioning film 21 away from the bottom surface 11. A pull strip 231 is connected to the release film 23. A notch 212 is provided on the side of the positioning film 21 corresponding to the operation port 111.

[0060] Understandably, the adhesive layer 211 on the side of the positioning film 21 away from the bottom shell serves to adhere the protective film 22. The pull strip 231 connected to the release film 23 makes it easier and more convenient to remove the release film 23. Since the positioning film 21 has a notch 212 on the side corresponding to the operation port 111, and the notch 212 is located near the operation port 111 without the adhesive layer 211, the protective film 22 corresponding to the notch 212 will first contact the screen and adhere to the screen due to the reduced adhesion, thereby generating an adhesion force. From the side near the operation port 111, the entire protective film 22 is pushed to adhere sequentially and orderly to the side away from the operation port 111, allowing gas to escape smoothly without generating air bubbles.

[0061] Optionally, as one method of applying a screen protector, the electronic device is placed in the receiving slot 13 with the screen of the electronic device facing the bottom surface 11. The release film 23 is peeled off by pulling the pull strip 231. The user presses the corresponding area of ​​the positioning film 21 at the operation port 111, and the protective film 22 is simultaneously squeezed. The film is applied sequentially from the side closer to the operation port 111 to the side farther away from the operation port 111. There is no adhesive layer 211 at the notch 212. The protective film 22 corresponding to the notch 212 contacts the screen first due to the reduced adhesion, providing an entry point for the entire screen protector application process, making the entire application process more orderly.

[0062] Optionally, the positioning film 21 is also provided with a limiting hole 213 corresponding to the limiting member 112, so that the two cooperate to fix the position of the protective film assembly 20.

[0063] Please see Figure 5Furthermore, there are two notches 212, which are spaced apart, and the area of ​​the positioning membrane 21 located between the two notches 212 is at least partially exposed to the operating port 111.

[0064] Understandably, the spacing between the two notches 212 ensures a more uniform application of the protective film 22 from the side closest to the operating port 111 to the side furthest from the operating port 111, preventing oblique application paths that could hinder gas escape. The positioning film 21, located between the two notches 212, is at least partially exposed to the operating port 111, corresponding to the area where the user applies pressure, ensuring the accuracy of the applied pressure and assisting the protective film 22 in sequentially applying to the screen from the side closest to the operating port 111 to the side furthest from the operating port 111. The number of other notches 212 is not limited here.

[0065] Compared with the prior art, the film application device and film application assembly of this utility model have the following advantages:

[0066] 1. This utility model provides a screen protector application device, which includes a main body, a bottom surface, and a side wall disposed on one side of the bottom surface. The bottom surface and the side wall enclose a receiving groove. An operation port is provided on the bottom surface, penetrating the bottom surface and communicating with the receiving groove. The length direction of the receiving groove is defined as a first direction, and the width direction of the receiving groove is defined as a second direction. The operation port is disposed along the first direction, and the side wall includes two outer wall surfaces disposed along the first direction. In the second direction, the distance from the operation port to one of the outer wall surfaces is less than the distance to the other outer wall surface. The distance from the operation port to one of the outer wall surfaces in the second direction is less than the distance to the other outer wall surface, forming an asymmetrical layout. During the screen protector application process, because the operation port is closer to the outer wall surface on one side of the side wall, the area between the protective film and the screen corresponding to the operation port has a relatively short exhaust path and low resistance, forming a low-resistance exhaust starting area. When the user applies pressure from the operation port, the gas in this area is squeezed and mainly diffuses and is discharged along the outer wall surface closer to the operation port (low resistance side) to the outer wall surface farther from the operation port (high resistance side). This gradual venting method, progressing from the low-resistance side to the high-resistance side, creates an orderly and directional venting path, effectively reducing air bubble formation and improving the flatness and adhesion quality of the film. Furthermore, because the operating port is positioned along the first direction (length), the protective film gradually adheres to the screen along the second direction (width). Since the width dimension is smaller than the length dimension, the adhesion path is shorter, facilitating complete air expulsion. The offset position of the operating port allows air to gradually escape from the side closer to the outer wall surface to the other side, avoiding the problem of disordered air bubble accumulation caused by traditional horizontal venting in the middle, thus improving the film application effect.

[0067] 2. In this embodiment of the invention, the outer wall surface with a relatively small distance from the operating port is defined as the first wall surface. In the second direction, the distance from the operating port to the first wall surface is 0. When the distance from the operating port to the first wall surface is 0 in the second direction, it means that one edge of the operating port is flush with the first wall surface, forming an opening. The user can operate smoothly and without obstruction at the opening. At this time, the area where the user presses the protective film through the operating port will be strictly limited to the side close to the first wall surface, and the starting point of the pressing force is aligned with the near end of the gas discharge. This structure can force the gas to be discharged preferentially from the side closest to the first wall surface, avoiding disorderly diffusion of gas in other directions due to the displacement of the operating port position. When pressing, the gas can only be discharged gradually along the single path from the first wall surface through the operating port to the other side, reducing the possibility of air bubbles being trapped from the source. This is especially suitable for scenarios with high requirements for exhaust accuracy, such as curved screens and screen protectors for narrow-bezel devices.

[0068] 3. In this embodiment of the invention, the outer wall surface that is relatively close to the operating port is defined as the first wall surface, and the side of the operating port near the first wall surface is defined as the first groove surface. In the second direction, the distance from the first groove surface to the first wall surface is between 3mm and 25mm. When the distance from the first groove surface to the first wall surface is between 3mm and 25mm in the second direction, it means that the operating port is completely located in the bottom area and no opening is formed at the first wall surface. This still allows the gas to be guided to diffuse and be discharged along the outer wall surface that is closer to the operating port to the outer wall surface that is farther away from the operating port, thus taking into account structural strength, ease of operation, and exhaust efficiency.

[0069] 4. In the second direction provided in this embodiment of the utility model, the width of the operating opening is between 3mm and 30mm. The operating opening width is limited to between 3mm and 30mm. The lower limit of 3mm ensures that fingers or tools can be inserted into the operating opening to contact the protective film, meeting basic pressing requirements; the upper limit of 30mm avoids an excessively wide operating opening that would lead to a dispersed pressing area, preventing disordered air release due to simultaneous pressing of an excessively wide area, and also reducing the offset of the protective film caused by uneven force during pressing. The width of the operating opening can be specifically set according to the size of the electronic device. A smaller width is suitable for small-screen devices such as mobile phones, allowing for more precise air release; a larger width is used for large-screen devices such as large-screen mobile phones or tablets, covering a wider area, thereby meeting the film application needs of electronic devices of different sizes.

[0070] 5. In the first direction provided in this embodiment of the utility model, the ratio of the length of the operating port to the length of the receiving groove is between 0.2 and 0.8. By limiting the ratio of the length of the operating port to the length of the receiving groove to between 0.2 and 0.8, the coverage range of the operating port is optimized. The minimum ratio of 0.2 ensures that the operating port is long enough, allowing the user to have sufficient operating area and avoiding the formation of edge bubbles due to the operating port being too short; the maximum ratio of 0.8 prevents the operating port from being too long, so as not to affect the structural stability of the device or occupy too much space. A reasonable length ratio can reduce the amount of material used, reduce manufacturing costs, and maintain the stability of the structure.

[0071] 6. The operating port provided in this embodiment of the utility model includes a straight segment and two arc-shaped segments, with the two arc-shaped segments located on both sides of the straight segment. The straight segment ensures a linear pressing path along the first direction, so that after pressing, a low-resistance exhaust starting area is formed along the first direction near one side of the outer wall, allowing gas to diffuse and be discharged evenly from that side to the outer wall side farther away from the operating port; the arc-shaped segments eliminate the sharp corners of the operating port, providing a buffer for fingers to enter the operating port for operation, and improving operational safety.

[0072] 7. In this embodiment of the invention, the sidewall is provided with a pull-out groove at one end in the first direction, and the bottom surface is provided with a limiting member at at least one end in the first direction. The pull-out groove provides a pull-out space, making it convenient for the user to pull the pull strip through the pull-out groove to peel off the release film. The bottom surface is provided with a limiting member at at least one end in the first direction, which is used to fix the protective film assembly when applying the film, ensuring that the protective film can be accurately attached to the screen.

[0073] 8. The film-applying assembly provided in this embodiment of the present invention has the same beneficial effects as the film-applying device described above, and will not be repeated here.

[0074] 9. The protective film assembly provided in this embodiment includes a positioning film, a protective film, and a release film. The positioning film, protective film, and release film are arranged sequentially in a direction away from the bottom surface. An adhesive layer is provided on the side of the positioning film away from the bottom surface, and a pull strip is connected to the release film. The positioning film has a notch on the side corresponding to the operation port. The adhesive layer on the side of the positioning film away from the bottom shell can fix the protective film assembly and prevent the position of the protective film assembly from shifting, affecting the film application effect. The pull strip connected to the release film makes it easier and more convenient to remove the release film. Because the positioning film has a notch on the side corresponding to the operation port, the notch is located on the side closer to the operation port and there is no adhesive layer at the notch. The protective film corresponding to the notch will first contact the screen and adhere to the screen due to the reduced adhesion, thereby generating an adhesion force. From the side closer to the operation port, the entire protective film is sequentially and orderly adhered to the side away from the operation port, and air can be smoothly discharged without generating air bubbles.

[0075] 10. In this embodiment of the invention, two notches are provided, spaced apart. The area of ​​the positioning film between the two notches is at least partially exposed to the operating port. The spacing between the two notches makes the process of the protective film gradually adhering from the side closer to the operating port to the side farther away from the operating port more uniform, avoiding oblique adhering paths that would prevent smooth gas discharge. The area of ​​the positioning film between the two notches is at least partially exposed to the operating port, corresponding to the area where the user applies pressure, ensuring the accuracy of the pressure applied by the user, and assisting the protective film in adhering to the screen sequentially from the side closer to the operating port to the side farther away from the operating port.

[0076] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A film application device, characterized in that: The film-applying device includes a main body, which includes a bottom surface and a side wall disposed on one side of the bottom surface. The bottom surface and the side wall enclose a receiving groove. An operation opening is provided on the bottom surface, which penetrates the bottom surface and communicates with the receiving groove. The length direction of the receiving groove is defined as a first direction, and the width direction of the receiving groove is defined as a second direction. The operation opening is disposed along the first direction, and the side wall includes two outer wall surfaces disposed along the first direction. In the second direction, the distance from the operation opening to one of the outer wall surfaces is less than the distance to the other outer wall surface.

2. The film-applying device as described in claim 1, characterized in that: The outer wall surface that is relatively close to the operating port is defined as the first wall surface, and in the second direction, the distance from the operating port to the first wall surface is 0.

3. The film-applying device as described in claim 1, characterized in that: The outer wall surface that is relatively close to the operating port is defined as the first wall surface, and the side of the operating port that is close to the first wall surface is defined as the first groove surface; in the second direction, the distance from the first groove surface to the first wall surface is between 3mm and 25mm.

4. The film-applying device as described in claim 1, characterized in that: In the second direction, the width of the operating port is between 3mm and 30mm.

5. The film-applying device as described in claim 1, characterized in that: In the first direction, the ratio of the length of the operating port to the length of the receiving groove is between 0.2 and 0.

8.

6. The film-applying device as described in claim 1, characterized in that: The operating port includes a straight segment and two arc segments, with the two arc segments located on both sides of the straight segment.

7. The film-applying device as described in claim 1, characterized in that: The sidewall has a pull-out groove at one end in the first direction, and the bottom surface has a limiting member at at least one end in the first direction.

8. A film-applied assembly, characterized in that: The film application assembly includes a film application device and a protective film assembly as described in any one of claims 1 to 7, wherein the protective film assembly is disposed on the film application device.

9. The film-applying assembly as described in claim 8, characterized in that: The protective film assembly includes a positioning film, a protective film, and a release film. The positioning film, the protective film, and the release film are arranged sequentially in a direction away from the bottom surface. An adhesive layer is provided on the side of the positioning film away from the bottom surface. A pull strip is connected to the release film. The positioning film has a notch on the side corresponding to the operating port.

10. The film-applying assembly as described in claim 9, characterized in that: The number of notches is two, and the two notches are spaced apart. The area of ​​the positioning membrane located between the two notches is at least partially exposed to the operating port.

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