Film application assist device and protective film assembly compatible therewith

Abstract

This invention provides a film application assist device and a protective film assembly that enable easy film application and achieve high-quality film application results. [Solution] The film application assist device comprises a base 300, a slide rail mechanism 310, a fixing assembly 320, and a roll mechanism 330. The slide rail mechanism includes a pair of L-shaped linear guideways 311 that extend continuously from the top surface of the base to the front surface. The fixing assembly includes four positioning members, two of which are positioning blocks on the top surface of the base, and the other two are positioning columns hinged to two housing grooves in the base. The roll mechanism is attached to the linear guideways and moves from the front surface to the top surface of the base to press the protective film in stages. When the positioning columns are tilted to the side, the roll mechanism becomes removable. The protective film assembly includes a flexible glass protective film, an adhesive layer, an adhesive release film, and a temporary protective film.

Description

Technical Field

[0001] The present invention relates to the field of film sticking to foldable displays, and particularly to a film sticking auxiliary device.

Background Art

[0002] With the rapid development of flexible display technology, foldable display-equipped electronic devices are becoming increasingly popular due to their unique foldability. In order to protect the surface of the foldable display from daily damages such as scratches and collisions, a display protection film has become an essential accessory. In recent years, protection films for ultra-thin flexible glass (UTG) have been becoming the mainstream solution for protecting foldable displays because they combine flexibility and high hardness.

[0003] In the film sticking process, the method of achieving accurate alignment between the protection film and the display and bubble-free sticking is a key point affecting the film sticking effect. For this reason, various film sticking auxiliary devices have already appeared in the prior art. For example, like the Chinese utility model with the application number CN202620164959.7 proposed by the inventor before the present application (this utility model belongs to the utility model and patent family with the Japanese registration number "Registration Number 3255507" and the registration date of April 3, 2026), the film sticking auxiliary device described in this utility model includes a base, a slide rail mechanism, a fixed assembly, and a roll mechanism. Among them, the roll mechanism is detachably attached to the linear guideway through a detachable groove, and the operator controls the movement of the roller along the guide rail through a handle, thereby realizing the step-by-step pressure contact of the protection film. The above prior art improves the success rate of film sticking and the ease of operation to a certain extent.

[0004] However, in actual use, the above device still suffers from the following shortcomings: 1. The roll mechanism and slide rail are detachably connected via a detachable groove, making installation and removal easy. However, due to variations in installation, roll equipment mounted via the detachable groove structure is prone to rattling or snagging in the roll mechanism during the rolling process, affecting the stability of film application. 2. The presence of the detachable groove increases the complexity of the slide rail structure, which tends to reduce alignment accuracy after prolonged use.

[0005] To overcome the above problems, this application proposes a film application assist device and a protective film assembly compatible therewith. [Overview of the project]

[0006] The first objective of this application is to solve the technical problems in conventional film application assist devices, such as the tendency for rattling or sticking to occur during the rolling process in the roll mechanism, the complexity of the slide rail structure, and the decrease in alignment accuracy after prolonged use. This application provides a film application assist device.

[0007] The film application assisting device provided in this application is used for applying a protective film to the display surface of an electronic device. A base for fixing the aforementioned electronic device, A slide rail mechanism provided on the base, including a pair of linear guideways, wherein the linear guideways are L-shaped and the slide rail mechanism extends continuously from the upper surface of the base to the front surface of the base, A fixing assembly comprising at least four positioning members, provided on the base and used to fix the protective film assembly, The device comprises a roll mechanism slidably mounted on the linear guideway, which moves along the linear guideway from the front surface of the base to the upper surface of the base, and which can press a protective film onto the display surface in stages during its movement.

[0008] In the above technical solution, the film application assist device achieves continuous pressure contact of the roll mechanism from the natural starting position of the edge of the device through the design of an innovative L-shaped linear guideway and a simplified slide rail structure, effectively avoiding problems of warping or air bubbles that tend to appear at the starting edge of film application. The L-shaped linear guideway extends continuously from the front surface of the base to the top surface, making the movement path of the roll mechanism smoother and more fluid. Furthermore, in this solution, the attachment groove structure of the prior art is eliminated, and the roll mechanism is directly attached to the linear guideway, eliminating rattling or sticking during the rolling process, ensuring uniform pressure by the roller, and resulting in more stable and reliable quality of the applied film. Because the attachment groove is eliminated, the structure of the slide rail mechanism is simpler, avoiding the problem of reduced alignment accuracy due to wear of the attachment groove caused by long-term use, and extending the service life of the device.

[0009] Preferably, of the four positioning members of the fixed assembly, two are positioning blocks located on the upper surface of the base, and the other two are positioning columns located at the lower left and lower right corners of the base.

[0010] In the above technical solution, the design combining positioning blocks and positioning columns enables accurate multi-directional positioning of the protective film assembly. Two positioning blocks on the upper surface of the base form surface contact positioning with the protective film assembly, and two positioning columns at the lower left and lower right corners position the corners. The synergistic effect of both ensures that the protective film assembly is always held in the correct position and orientation during the film application process, avoiding displacement and misalignment, and achieving a more perfect film application effect.

[0011] Preferably, the lower left and lower right corners of the base are provided with accommodating grooves, and the two positioning columns are hinged to each other within the two accommodating grooves, and when both of the two positioning columns are laid on their sides and housed within the accommodating grooves, the roll mechanism can be removed from the base along the linear guideway, and when both of the two positioning columns are upright, the positioning columns restrict the roll mechanism and prevent it from being removed from the linear guideway.

[0012] In the above technical solution, by hinge-connecting the positioning columns within the housing groove, an innovative organic unification of two functions—ease of removal of the roll mechanism and reliable positional restriction—is achieved. When it is necessary to remove the roll mechanism for cleaning or maintenance, the two positioning columns can be laid on their sides and stored in the housing groove, allowing the roll mechanism to slide out easily along the guide rail. When performing film application work, raising the two positioning columns physically restricts the roll mechanism, preventing unintended escape during rolling. This design does not require the addition of positional restriction members, has a simple structure, is easy to work with, and improves the safety and usability of the equipment.

[0013] Preferably, the base is provided with relief holes.

[0014] In the above technical solution, the provision of relief holes in the base achieves dual optimization of structure and process. This design not only effectively reduces the overall weight of the device and improves portability and ease of operation, but also improves the release performance during injection molding through optimized material distribution. The rational placement of the relief holes ensures the structural strength of the base, significantly reduces raw material consumption, lowers production costs, and provides a practical solution for the industrial production of film application equipment.

[0015] Preferably, a positioning groove for receiving the electronic device is provided in the base.

[0016] In the above technical solution, a positioning groove is provided in the base to match the outer shape of the target electronic device, thereby enabling rapid and accurate fixing of the electronic device. This design ensures that the device remains stable throughout the film application process, preventing misaligned film application caused by device movement, simplifying the work process, and allowing the user to position the device simply by placing it in the groove without requiring additional adjustments, significantly improving ease of use.

[0017] A second object of this application is to provide a protective film assembly that, when combined with the above-mentioned film application assisting device, enables accurate positioning and easy application of the protective film.

[0018] To achieve the above objective, this application provides a protective film assembly for use in combination with the film application assist device described in any one of the above paragraphs. A flexible glass protective film made from ultra-thin flexible glass, which is foldable, An adhesive layer is provided on one side of the flexible glass protective film and is used to attach the flexible glass protective film to the surface of a foldable display. A release film for the adhesive layer, which is used to cover the outside of the adhesive layer and protect the adhesive layer, The flexible glass protective film comprises a temporary protective film covering the side of the flexible glass protective film away from the adhesive layer, A positioning structure is provided on the temporary protective film that engages with the fixing assembly of the film application assisting device.

[0019] In the above technical solution, the protective film assembly achieves precise mechanical alignment between the protective film and the film application device by installing a positioning structure on a temporary protective film combined with a film application assist device. The combination of the flexible glass protective film and a dedicated adhesive layer ensures excellent foldability and provides reliable protection for the display. The dual protection mechanism of the adhesive layer release film and the temporary protective film effectively prevents damage to the surface and adhesive layer of the protective film during transportation and handling. By introducing the positioning structure, the protective film assembly can form a stable combination relationship with the fixed assembly (positioning block and positioning column) of the film application assist device, ensuring positional stability during the application process, avoiding displacement and misalignment, and resulting in a more perfect film application effect.

[0020] Preferably, the positioning structure includes positioning holes or positioning grooves corresponding to the positioning block and positioning column of the fixed assembly, respectively.

[0021] In the above technical solution, the positioning structure is specifically made into a positioning hole or positioning groove, thereby forming a one-to-one correspondence between the positioning block and positioning column of the film application assist device. This design enables rapid and accurate alignment during the protective film assembly application process, and by using a mechanical positioning method instead of conventional visual alignment, it significantly improves film application accuracy and work efficiency, allowing even ordinary users to easily complete professional-level film application work.

[0022] Preferably, the length and width dimensions of the temporary protective film and the adhesive release film are both larger than those of the flexible glass protective film, forming an extended edge portion.

[0023] In the above technical solution, by designing the temporary protection film and the adhesive layer release film to have dimensions larger than those of the flexible glass protection film and to serve as the outer extension edge, a plurality of technical advantages are realized. The design of this structure provides a highly reliable working boundary and a mechanical clamping area for film pasting, effectively preventing contamination of the device due to overflow of the adhesive layer, and facilitating accurate positioning and fixing in combination with the film pasting auxiliary device. The installation of the outer extension edge further facilitates the industrialized production of the protection film assembly and ensures the structural integrity and use reliability of the entire product.

[0024] Preferably, the positioning structure is provided at the outer extension edge of the temporary protection film.

[0025] In the above technical solution, by providing the positioning structure at the outer extension edge of the temporary protection film, the risk of stress concentration or strength reduction that may be caused by the opening of the positioning holes in the flexible glass protection film body is avoided. This design guarantees accurate positioning, fully protects the integrity and foldability of the flexible glass protection film, and embodies the synergistic integration of structural optimization and function realization.

[0026] Preferably, the adhesive layer release film is provided with a release pull tab for quickly peeling off the adhesive layer release film.

[0027] In the above technical solution, by installing the release pull tab on the adhesive layer release film, the preparatory work before film pasting is greatly simplified. The user can easily peel off the adhesive layer release film just by grasping the release pull tab, without the need to use a jig or spend time finding the edge of the release film, making the peeling operation easier and more efficient, greatly reducing the difficulty of the user's work, and further reducing the possibility of generating bubbles and dust during the pasting process.

[0028] As described above, the present application has at least one of the following beneficial technical effects.

[0029] The film application assist device and corresponding protective film assembly provided in this application, through innovative structural design and synergistic optimization, provide a more reliable display protection solution for devices with foldable displays. The film application assist device employs an L-shaped linear guideway to achieve continuous pressure application by the roll mechanism from the natural starting position of the device edge, effectively solving problems of warping and air bubbles at the film application starting edge. The removal groove is eliminated, simplifying the slide rail structure and avoiding accuracy degradation after long-term use. The hinged housing groove design of the positioning column innovatively integrates the removal and positioning of the roll mechanism. The protective film assembly achieves rapid and accurate alignment between the protective film and the display through the precise combination of the positioning structure on the temporary protective film and the positioning block and positioning column of the film application device. Human-centered design, such as release pull tabs, makes the peeling process easier and more efficient. This technical solution, through the synergistic optimization of the protective film assembly and film application device, solves industry challenges such as bubble control, precise alignment, and the difficulty of the work during the film application process to foldable displays, significantly reducing the barrier to entry and allowing even general consumers to easily achieve professional-level film application results. [Brief explanation of the drawing]

[0030] [Figure 1] This is a schematic diagram of the structure of a conventional film application assist device. [Figure 2] This is a schematic diagram of the structure of the film application assist device according to Embodiment 1 of this application. [Figure 3] This is a schematic diagram showing the hinge connection relationship of the positioning column of the film application assisting device of Embodiment 1 of this application. [Figure 4] This is another schematic diagram showing the hinge connection relationship of the positioning column of the film application assist device of Embodiment 1 of this application. [Figure 5] This is a schematic diagram illustrating the usage state of the film application assist device according to Embodiment 1 of this application. [Figure 6] This is a schematic diagram illustrating another usage state of the film application assist device of Embodiment 1 of this application. [Figure 7] This is a schematic diagram of the combination relationship between the film application assist device, the foldable smartphone, and the protective film assembly according to Embodiment 1 of this application. [Figure 8] This is a schematic diagram of another combination relationship between the film application assist device, folding smartphone, and protective film assembly of Embodiment 1 of this application. [Figure 9] This is a top view of the film application assist device according to Embodiment 1 of this application. [Figure 10] This is a top view of the film application assist device according to Embodiment 2 of this application. [Modes for carrying out the invention]

[0031] The present application will be described in more detail below with reference to the drawings.

[0032] Explanation of the conventional technology Referring to Figure 1, in the field of display protection for devices with foldable displays, a film application assistance device 3 already exists, which is the subject of a utility model application previously filed by the inventor (CN202620164959.7, Japanese registration number 3255507 of the patent family). The device comprises a base 300, a slide rail mechanism 310, a fixing assembly 320, and a roll mechanism 330. The slide rail mechanism 310 consists of two linear slide rails 311 and two attachment grooves 312, with the two linear slide rails 311 provided on the left and right sides of the upper surface of the base 300, and the two attachment grooves 312 provided on each of the two linear slide rails 311. The roll mechanism 330 is detachably mounted on the linear guideway 311 via the attachment grooves 312. After the operator places the electronic device 2 on the base 300, the fixing assembly 320 fixes the protective film, and then the roll mechanism 330 applies the film by stepwise pressure. This method represents some progress in terms of ease of operation and the success rate of film application.

[0033] However, the device still has shortcomings in actual use. The roll mechanism 330, which is attached via the attachment groove 312 structure, is prone to rattling or snagging during the rolling process due to variations in attachment, affecting the stability of film application. On the other hand, the attachment groove 312 increases the complexity of the slide rail 311, and after prolonged use, the alignment accuracy is prone to decrease due to wear.

[0034] To address the above-mentioned problems, this application provides an improved film application assist device and a protective film assembly compatible therewith. The technical solutions of this application will be described in detail below with reference to specific embodiments.

[0035] Example 1 This embodiment provides a film application assist device and a protective film assembly compatible therewith.

[0036] 1. Film application assist device Referring to Figure 2, the film application assist device 3 of this embodiment is used to apply a protective film to the surface of the display of an electronic device (for example, a smartphone with a foldable display), and mainly comprises a base 300, a slide rail mechanism 310, a fixing assembly, and a roll mechanism 330.

[0037] Base 300: The base is made of ABS engineering plastic and is injection molded, forming a rectangular plate structure overall. The top surface of the base is provided with a positioning groove 302 for receiving electronic devices. The shape of the positioning groove 302 is designed to match the external shape of the target foldable display device (e.g., fold7 foldable smartphone), ensuring that the electronic device is stably positioned without displacement during the film application process. The base 300 is further provided with multiple relief holes 301. The structure of the relief holes 301 makes the base 300 easier to release during injection molding and saves on raw material usage.

[0038] Slide rail mechanism: The slide rail mechanism is mounted on a base and includes a pair of parallel linear guideways 311. This pair of linear guideways 311 is L-shaped and extends continuously from the upper surface of the base 300 to the front surface of the base. The surfaces of the linear guideways 311 are smoothed to ensure a coefficient of friction of ≤0.1, allowing the roll mechanism 330 to slide smoothly.

[0039] Fixing Assembly: The fixing assembly is mounted on the base 330 and is used to fix the protective film assembly. The fixing assembly includes four positioning members. Two of these are positioning blocks located on the top surface of the base, which are the first positioning block 321 and the second positioning block 322, respectively, and the other two are positioning columns 323 located at the lower left and lower right corners of the base.

[0040] The first positioning block 321 and the second positioning block 322 are located on the upper surface of the base, on the side closer to the starting end of the roll mechanism 330 (i.e., the side closer to the front of the base). The shapes of the first positioning block 321 and the second positioning block 322 are slightly different; in this embodiment, the width of the second positioning block 322 is slightly larger than that of the first positioning block 321. The purpose of this design with different shapes is to provide a "error-prevention" function and prevent the worker from placing the protective film assembly upside down.

[0041] Referring to Figures 3 and 4, the two positioning columns 323 are located at the lower left and lower right corners of the base (when viewed from the bottom). A housing groove 303 is provided at each of the lower left and lower right corners of the base 300, and the two positioning columns are each housed within the two housing grooves 303 via a hinge connection structure. Specifically, the lower end of each positioning column 323 is hinged to the side wall of the housing groove 303 via a pivot axis, allowing the positioning columns 323 to rotate within a predetermined angular range. When it is not necessary to restrict the roll mechanism 330, the two positioning columns 323 can be laid on their sides and stored in the housing grooves 303. In this case, the upper surfaces of the positioning columns 323 are almost flush with the upper surface of the base 300. When it is necessary to perform film application work, the two positioning columns 323 can be erected perpendicular to the upper surface of the base 300. In this case, the positioning columns can physically restrict the roll mechanism 330.

[0042] Roll mechanism 330: The roll mechanism includes a bracket, sliders, and rollers. The bracket is door-shaped or U-shaped, and sliders are provided at each end of the bottom of the bracket. The two sliders are slidably fitted to a pair of linear guideways. The rollers are rotatably mounted on the bracket and are made of silica gel material with a Shore hardness of A50 and their length matches the width of the protective film. The roll mechanism in this embodiment does not have an operating handle; during operation, the user directly presses the bracket with their hands to move the roll mechanism along the linear guideways.

[0043] Referring to Figure 5, the roll mechanism 330 is slidably mounted on the linear guideway 311 and can move along the linear guideway 311 from the front surface of the base 300 to the top surface of the base. When the roll mechanism 330 is pressed to move to the top surface of the base 300, the roller presses the protective film assembly into stepwise contact with the display surface of the electronic device during rolling.

[0044] Referring to Figure 6, the roll mechanism 330 can slide out of the linear guideway 311 as needed, thereby enabling removal from the base 300.

[0045] 2. Protective film assembly Referring to Figure 7, the protective film assembly 1 of this embodiment is used in combination with the film application assist device 3 to apply a film to a foldable smartphone 2, and mainly includes a flexible glass protective film, an adhesive layer, an adhesive layer release film, and a temporary protective film.

[0046] Flexible glass protective film (not shown, placed between temporary protective film 105 and adhesive release film 103): Made of ultra-thin flexible glass (UTG), it is foldable. The flexible glass protective film has a thickness of 50 μm, undergoes chemical strengthening treatment, and can be bent to a radius of 3 mm without cracking. The length and width dimensions of the protective film are perfectly matched to the display area of ​​the target foldable display device.

[0047] Adhesive layer (not shown): Provided on one side (bottom surface) of the flexible glass protective film, it is used to attach the flexible glass protective film to the surface of the foldable display. The adhesive layer is made of optical transparent adhesive film (OCA), has a thickness of 25 μm, a light transmittance of ≥92%, and an elastic modulus of 0.3 MPa, making it suitable for repeated bending of the foldable display.

[0048] Adhesive layer release film 103: This film is applied to the outside of the adhesive layer and is used to protect the adhesive layer until it is peeled off during film application. The adhesive layer release film 103 is a single-sided release PET film with a thickness of 100 μm and a release force of 10 g / 25 mm. One edge of the adhesive layer release film extends to form a release pull tab 104, which is a flap-like structure protruding from the edge of the adhesive layer release film, making it easy for the user to grasp and stably peel off the adhesive layer release film.

[0049] Temporary protective film 105: This film is applied to the side (top surface) of the flexible glass protective film that is away from the adhesive layer. It is used to prevent damage to the surface of the flexible glass protective film during transportation or handling, and is removed after the film has been applied. The temporary protective film is made of highly transparent PET material, has a thickness of 125 μm, and is treated with an anti-scratch coating on its surface.

[0050] Referring to Figure 8, the temporary protective film 105 is provided with a positioning structure that engages with the fixing assembly of the film application assist device. Specifically, the temporary protective film is provided with a first positioning hole 106 and a second positioning hole 107, which correspond to the first positioning block 321 and the second positioning block 322 on the base 300, respectively, and also has two third positioning holes 108 for engaging with the two positioning columns 323. Because the shapes of the first positioning hole 321 and the second positioning hole 322 are different, the protective film assembly can only be placed on the base in the correct orientation. When the orientation is correct, the first positioning hole 321 and the second positioning hole 322 can be precisely aligned with the two positioning blocks and smoothly fitted. If the orientation is reversed, the shapes will not match, and the protective film assembly cannot be placed correctly, thus serving as a warning against errors.

[0051] The length and width dimensions of the temporary protective film 105 and the adhesive release film 103 are both larger than those of the flexible glass protective film, forming the outer edge. The positioning structure is provided on the outer edge of the temporary protective film, enabling accurate positioning.

[0052] 3. Film application procedure Referring to Figure 8, the steps for applying a film using the film application assist device and protective film assembly of this embodiment are as follows:

[0053] Securing the electronic device: Place the foldable smartphone 2 into the positioning groove on the base to ensure stable mounting of the smartphone.

[0054] Prepare the protective film assembly 1: Remove the protective film assembly 1, turn the temporary protective film 105 upwards, and precisely align the positioning holes on the protective film assembly with the positioning blocks on the base. Because the shapes of the first positioning hole 106 and the second positioning hole 107 are different, they can only be positioned in a specific orientation. Gently lower the protective film assembly 1 and insert the positioning blocks into the corresponding positioning holes, while simultaneously ensuring that the extended edges around the protective film assembly 1 contact the corresponding parts on the base, thereby achieving precise positioning of the protective film assembly.

[0055] Erecting the positioning columns 323: Erect the two positioning columns 323 at the lower left and lower right corners of the base from a horizontal position so that they are perpendicular to the top surface of the base 300.

[0056] Peel off the adhesive layer release film 104: Grasp the release tab 103 with your hand and steadily peel off the adhesive layer release film 104 to expose the adhesive layer.

[0057] Rolling bonding: The roll mechanism 300 is pressed directly by hand, and the roll mechanism is moved at a constant speed from the front surface of the base 300 to the top surface of the base. During the rolling process, the roller presses the protective film assembly onto the smartphone display surface in stages from one end to the other. The L-shaped guide rail design allows the roll mechanism to press from the natural starting position of the device's edge, effectively avoiding the occurrence of warping or air bubbles at the starting end of film bonding.

[0058] Removing temporary protective film 105: After the flexible glass protective film has been fully applied, gently peel off temporary protective film 105 from one corner.

[0059] Remove the device: Remove the foldable smartphone 2 with the film applied from the base 300 and complete the film application process.

[0060] Example 2 Referring to Figures 9 and 10, the only difference between this embodiment and Embodiment 1 is the arrangement of the relief holes on the base; all other structures, connections, and operating principles are the same as in Embodiment 1.

[0061] It should be explained that these differences in the shape of the relief holes are due to optional configurations in the mold design during the production manufacturing process. There is no substantial difference between the two in terms of function and film application effect, and both can achieve the technical effects of reducing base weight, saving raw materials, and improving injection molding and release performance. This embodiment is protected as substantially the same alternative as Example 1.

[0062] Other Embodiments The above description is merely a preferred embodiment of the present application and does not limit the scope of protection of this application. Those skilled in the art will understand that various equivalent changes or combinations can be made to the specific structure, dimensions, materials, etc., in the above embodiments without departing from the concept of this application. For example, The shape of the positioning block and positioning hole is not limited to circular or elliptical shapes; other irregular shapes such as triangles, rectangles, and cross shapes may be combined as long as they can achieve the function of preventing errors.

[0063] The material of the rollers in the roll mechanism is not limited to silica gel; other elastic materials such as rubber may also be used.

[0064] The number, shape, and distribution of the relief holes on the base can be adjusted according to actual needs.

[0065] As the hinge connection structure for the positioning column, a rotation axis, a hinge, or other structural forms that enable rotational storage can be adopted.

[0066] Any equivalent changes made based on the structure, shape, and principle of this application shall be included within the scope of protection of this application. [Explanation of symbols]

[0067] 1. Protective film assembly 103 Adhesive release film 104 Release pull tab 105 Temporary protective film 106 First positioning hole 107 Second positioning hole 108 Third positioning hole 2. Foldable smartphone 3. Film application assist device 300 base 301 Mitigation holes 302 Positioning groove 303 Storage groove 311 Linear slide rail 312 Attachment / detachment groove 321 First positioning block 322 Second positioning block 323 Positioning column 330 Roll Mechanism

Claims

1. A film application assist device for attaching a protective film to the display surface of an electronic device, A base (300) for fixing the aforementioned electronic device, A slide rail mechanism provided on the base (300) and including a pair of linear guideways (311), wherein the linear guideways (311) are L-shaped and the slide rail mechanism extends continuously from the upper surface of the base (300) to the front surface of the base (300), A fixing assembly comprising at least four positioning members, provided on the base (300) and used to fix the protective film assembly, A film application assist device comprising: a roll mechanism (330) slidably mounted on the linear guideway (311), the roll mechanism (330) moving along the linear guideway (311) from the front surface of the base (300) to the upper surface of the base, and capable of gradually pressing a protective film onto the display surface during movement.

2. The film application assist device according to claim 1, characterized in that of the four positioning members of the fixed assembly, two are positioning blocks located on the upper surface of the base (300), and the other two are positioning columns (323) located at the lower left and lower right corners of the base.

3. The film application assist device according to claim 2, characterized in that a housing groove (303) is provided at the lower left corner and the lower right corner of the base (300), the two positioning columns are each hinged and provided within the two housing grooves (303), and when both of the two positioning columns are laid on their sides and stored within the housing grooves (303), the roll mechanism (330) can be removed from the base (300) along the linear guideway (311), and when both of the two positioning columns are upright, the positioning columns restrict the roll mechanism (330), preventing the roll mechanism (330) from being removed from the linear guideway (311).

4. The film application assist device according to claim 1, characterized in that the base (300) is provided with relief holes (301).

5. The film application assist device according to claim 1, characterized in that a positioning groove (302) for receiving the electronic device is provided in the base (302).

6. A protective film assembly for use in combination with a film application assist device according to any one of claims 1 to 5, A flexible glass protective film made from ultra-thin flexible glass, which is foldable, An adhesive layer is provided on one side of the flexible glass protective film and is used to attach the flexible glass protective film to the surface of a foldable display. A release film (103) for the adhesive layer is used to cover the outside of the adhesive layer and protect the adhesive layer, The flexible glass protective film comprises a temporary protective film (105) covering the side of the flexible glass protective film away from the adhesive layer, A protective film assembly characterized in that the temporary protective film (105) is provided with a positioning structure that engages with the fixing assembly of the film application assisting device (3).

7. The protective film assembly according to claim 6, wherein the positioning structure includes positioning holes or positioning grooves corresponding to the positioning block and positioning column of the fixed assembly, respectively.

8. The protective film assembly according to claim 6, characterized in that the temporary protective film (105) and the adhesive release film (103) are both larger in length and width than the flexible glass protective film and extend to the outer edge.

9. The protective film assembly according to claim 8, characterized in that the positioning structure is provided on the outer edge portion of the temporary protective film.

10. The protective film assembly according to claim 6, characterized in that the adhesive release film is provided with a release pull tab (104) for quickly peeling off the adhesive release film (103).

Images