Anti-adhesive protective film and protective shell

Abstract

The utility model discloses an anti-adhesive protective film and a protective shell, and belongs to the technical field of electronic equipment protection. The protective film comprises a first film and a second film which are attached to each other, the edge of the side edge of the second film exceeds the first film to form an adhesive edge, the surface of the side, facing the first film, of the adhesive edge is provided with an adhesive film layer, the adhesive film layer can adhere to a release film, the first film or the second film can also adhere to the release film, the adhesive edge is provided with more than two sections, the first film can be a tempered film, and the second film can be a tempered film. The second membrane may be a soft membrane. The protective shell comprises the protective film and a frame body, the frame body is used for being clamped to the edge of equipment to be subjected to film pasting and bonded with the bonding edge, the frame body can be divided into two sections, three sections or four sections, and a step structure is arranged at the bonding position of the inner side and the protective film so as to adapt to the height difference between the first film and the bonding edge. According to the utility model, the detachable connection between the diaphragm and the frame body is realized through the modular design, the edge fitting problem is solved, the maintenance cost is reduced, the use experience is improved, and the device is suitable for various electronic devices such as mobile phones, tablet computers, folding screens and the like.

Description

Technical Field

[0001] This utility model relates to the field of electronic device protection technology, and in particular to an anti-adhesive protective film and protective shell. Background Technology

[0002] In the field of protection for consumer electronic devices (such as mobile phones and tablets), the collaborative design of protective films and protective cases has long faced three major pain points:

[0003] I. Edge bonding and protection defects

[0004] Traditional full-coverage protective cases secure the screen protector by wrapping the back around the screen edge, but their rigid frame constantly presses against the edge of the film, resulting in:

[0005] The protective film may peel up at the edges and form bubbles. Under stress, it is easy to detach from the screen, forming gaps that allow dust and liquid to enter, affecting touch and appearance.

[0006] Degraded user experience: The raised edges feel rough to the touch, especially hindering edge-sliding operations on curved screen devices. Furthermore, the exposed edges of the film are prone to cracking when dropped, creating blind spots in protection.

[0007] II. Maintenance Costs and Ease of Use

[0008] Both existing integrated protection devices (with integrated membrane housing) and separate solutions have drawbacks:

[0009] Integrated solution: The protective film and the protective shell are fixedly connected. If any component is damaged, the whole thing needs to be replaced, resulting in high maintenance costs for users. In addition, it relies on professional tools for installation, and it is difficult to fit accurately to complex structures such as curved screens, resulting in poor adaptability.

[0010] Separate design: The protective film and the protective shell are installed independently with no effective connection at the edges, resulting in a significant height difference (the thickness of the film and the frame do not match), which easily accumulates dust and affects the grip; at the same time, the edges of the film lack support, resulting in insufficient protective performance.

[0011] III. Bottlenecks in Improving Existing Technologies

[0012] Although existing technologies have attempted to optimize the situation through edge reinforcement, magnetic positioning, and segmented adhesive, the core problem remains unresolved.

[0013] Edge reinforcement does not improve the connection with the protective shell, relying on the inherent defects of the wrap-around structure; the positioning accuracy and bonding strength of magnetic or adhesive solutions are insufficient, making it difficult to balance the ease of disassembly and the stability of protection; the lack of modular design makes it impossible to independently replace the diaphragm and the frame, resulting in poor compatibility and versatility.

[0014] To address this issue, a non-adhesive protective film and shell are proposed to solve the aforementioned problems. Utility Model Content

[0015] In view of this, an anti-adhesive protective film and protective shell are provided. The modular design enables the film and frame to be detachably connected, solving the problems of poor edge adhesion, high maintenance costs and poor compatibility.

[0016] The first aspect of this utility model is to provide a non-adhesive protective film, comprising a first film and a second film adhered to each other. The side edge of the second film extends beyond the side edge of the first film, forming an adhesive edge. An adhesive film layer is provided on the surface of the adhesive edge facing the first film for bonding to a protective shell. By bonding the adhesive film layer on the inner side of the adhesive edge to the protective shell frame, the traditional method of pressing and fixing the film edge is replaced, eliminating edge lifting and air bubbles caused by stress concentration, improving the sealing performance, and reducing dust and liquid intrusion. The adhesive edge serves as a connection medium between the film and the frame, enabling detachable bonding and laying a structural foundation for subsequent independent replacement of the film or frame, thus solving the problem of high maintenance costs associated with integrated solutions.

[0017] Further description of the aforementioned solution: The adhesive layer is also covered with a release film, which protects the adhesive layer before use to prevent dust contamination or premature adhesion; during installation, the release film can be removed to achieve quick positioning and adhesion between the frame and the adhesive edge, without the need for professional tools, thus reducing the difficulty of operation for users.

[0018] Further description of the aforementioned solution: The first or second membrane is coated with a release film. During transportation, storage, or installation, the release film protects the membrane from fingerprints, dust, or scratches, ensuring that the display effect and touch sensitivity are not affected after the film is applied.

[0019] Further description of the aforementioned solution: The adhesive edge is provided in two or more segments. The segmented adhesive edge can be flexibly designed according to the edge shape of the electronic device, such as two segments at the top and bottom, a C-shape on three sides, or a full wrap around all four sides. This avoids the obstruction of device interfaces, such as charging ports and volume buttons, by traditional full-wrap adhesive edges, while ensuring the fitting accuracy of edges with different curvatures. The multi-segment adhesive edge disperses the adhesive pull of the frame on the diaphragm, preventing adhesive failure caused by bending of the device or temperature differences due to a single long adhesive segment, thus improving connection stability.

[0020] Further description of the aforementioned solution: The first film is a tempered glass film, and the second film is a flexible film. The tempered glass film provides high-strength drop resistance and abrasion resistance, protecting the core area of ​​the screen; the flexible film, such as PET film, has good flexibility and bendable edges, making it easy to form an adhesive edge structure that extends beyond the first film. Furthermore, the flexible film material bonds more tightly with the adhesive layer, improving the durability of the adhesive edge. The extensibility of the flexible film allows the adhesive edge to adapt to the curved edges of curved screens, solving the problem of cracking caused by rigid contact at the edges of traditional tempered glass films, and expanding the product's application range.

[0021] The second aspect of this utility model is to provide a protective shell, including the aforementioned anti-adhesive protective film and a frame; the frame is used to snap onto the edge of the device to which the film is to be applied, and the frame is bonded to the adhesive edge. The frame is connected to the edge of the film through the adhesive edge, forming a composite protective structure of "film + frame," replacing the independent installation mode of the traditional separate solution, filling the protection blind spot of the exposed edge of the film, and improving drop resistance. The direct bonding of the frame to the adhesive edge ensures that the edge of the film and the frame are on the same plane, solving the problems of dust accumulation and discomfort when holding the film caused by the thickness mismatch between the film and the frame in the separate solution.

[0022] Further description of the aforementioned solution: The frame comprises two sections, which are respectively bonded to the adhesive edges at both ends of the second diaphragm. It is suitable for edge protection along the long axis of devices such as tablets and foldable screens. The two adhesive edges respectively fix the top and bottom of the device, preserving the operating areas on the left and right sides, such as the bending area of ​​a foldable screen, thus balancing protection and usability; reducing unnecessary frame coverage, lowering the weight of the protective case, and improving portability.

[0023] Further description of the aforementioned solution: The frame comprises three sections, which are connected end to end to form a C-shaped structure and are bonded to the adhesive edge of the second membrane side to adapt to a foldable screen.

[0024] Further description of the aforementioned solution: The frame comprises four segments, which are connected end-to-end to form an open-shaped structure and are bonded to the adhesive edges around the second diaphragm. This solution is suitable for extreme protection scenarios, such as outdoor equipment and devices used by children. The frame and adhesive edges are completely bonded, covering all edges of the screen, preventing dust and liquid intrusion, while enhancing drop resistance and reducing the risk of edge breakage. The closed, open-shaped structure evenly distributes external impact forces, avoiding damage to the diaphragm or frame caused by single-point force.

[0025] Further description of the aforementioned solution: A stepped structure is provided at the bonding point between the inner side of the frame and the protective film. This stepped structure accommodates the height difference between the first film and the adhesive edge. The height of the stepped structure matches the thickness of the first film, making the inner side of the frame flush with the surface of the film, eliminating the "step-like" feel of traditional protective shell edges, resulting in a smooth feel when gripped, and particularly improving the smoothness of edge sliding operations on curved screen devices. The stepped design fills the height difference between the adhesive edge and the first film, forming a continuous support surface, reducing warping deformation of the film edge due to uneven stress, and improving the overall structural reliability.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] I. Innovation in Edge Fitting and Protective Performance

[0028] The system employs an adhesive edge structure where the edge of the second diaphragm extends beyond that of the first diaphragm. This adhesive layer bonds the diaphragm to the frame, replacing traditional rigid compression fixation. This completely eliminates issues such as diaphragm edge lifting, air bubbles, and dust / liquid intrusion, significantly improving sealing and protection. The soft membrane material's adhesive edge is adaptable to complex shapes such as curved screens, preventing tempered glass edges from cracking and expanding the equipment's applicability.

[0029] II. Modular design reduces costs and improves efficiency

[0030] The membrane and frame are detachably connected via adhesive edges, allowing for independent replacement: when the membrane is worn or the frame is damaged, there's no need for complete replacement, significantly reducing maintenance costs; the stepped structure adapts to different membrane thicknesses, achieving universal compatibility with multiple membranes in one shell, and is compatible with mainstream devices. The release film design simplifies the installation process, allowing for precise application without specialized tools, improving the success rate of curved screen installation.

[0031] III. Detailed optimizations to improve the user experience

[0032] The stepped structure inside the frame eliminates the height difference between the membrane and the frame, resulting in a smooth, comfortable grip and smoother sliding operation on the curved screen. The non-adhesive design on the outer edge prevents dust accumulation and adhesive residue, keeping the device clean over time. The segmented frame design is lightweight, reducing weight by more than 30% compared to traditional full-coverage cases, and includes openings for charging ports and other functions without interfering with device operation.

[0033] IV. Universality and Industrial Value

[0034] The core architecture is applicable to multiple types of devices such as mobile phones, tablets, and foldable screens, providing a universal solution for both straight and curved screens; modular production reduces supply chain costs and inventory pressure, and promotes the upgrade of the electronic device protection field towards a new ecosystem of "independent replacement and diverse compatibility", combining technological innovation and industrial application value. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0036] Figure 1 This is an overall schematic diagram of Embodiment 1 of the present utility model;

[0037] Figure 2 , 3 This is an exploded view diagram provided for Embodiment 1 of the present invention;

[0038] Figure 4 This is a schematic diagram illustrating the use of Embodiment 2 of the present invention;

[0039] Figure 5 This is an exploded view diagram provided for Embodiment 2 of the present invention;

[0040] Figure 6 , 7 This is a cross-sectional schematic diagram of Embodiment 2 of the present invention;

[0041] Figure 8 This is a schematic diagram of the protective shell structure provided in Embodiment 2 of this utility model.

[0042] The following are the labeling elements in the figure:

[0043] 1. Protective film; 11. First film; 12. Second film; 121. Adhesive edge; 122. Release film; 2. Frame; 21. Step; 22. Edge fastening; 23. Top frame; 24. Side frame; 25. Bottom frame; 3. Mobile phone.

[0044] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0046] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0047] Example 1

[0048] Please see Figure 1 , 3 As shown, this embodiment discloses an anti-adhesive protective film, including a first film 11 and a second film 12 that are attached to each other. The side edge of the second film 12 extends beyond the side edge of the first film 11, and the extended portion forms an adhesive edge 121. An adhesive film layer is provided on the side surface of the adhesive edge 121 facing the first film 11 for bonding with the protective shell.

[0049] like Figure 2As shown, the adhesive layer is also covered with a release film 122. The release film 122 protects the adhesive layer before use to prevent dust contamination or premature adhesion. During installation, the release film 122 can be removed to achieve quick positioning and adhesion between the frame 2 and the adhesive edge 121 without the need for professional tools, thus reducing the difficulty of operation for users.

[0050] In this embodiment, a release film is adhered to either the first membrane 11 or the second membrane 12. During transportation, storage, or installation, the release film protects the membrane from fingerprints, dust, or scratches, ensuring that the display effect and touch sensitivity are not affected after the film is applied.

[0051] It should be noted that the adhesive edge 121 has more than two segments. The segmented adhesive edge 121 can be flexibly designed according to the edge shape of the electronic device, such as two segments at the top and bottom, three C-shaped segments, or four fully enclosed segments.

[0052] In this embodiment, the first film 11 is a tempered glass film, and the second film 12 is a flexible film. The tempered glass film provides high-strength drop resistance and abrasion resistance, protecting the core area of ​​the screen; the flexible film, such as PET film, has good flexibility and bendable edges, making it easy to form an adhesive edge 121 structure that extends beyond the first film 11. Furthermore, the flexible film material bonds more tightly with the adhesive layer, improving the durability of the adhesive edge 121. The extensibility of the flexible film allows the adhesive edge 121 to adapt to the curved edges of curved screens, solving the problem of cracking caused by rigid contact at the edges of traditional tempered glass films, and expanding the product's application range.

[0053] In this embodiment, the first film 11 is a 0.3mm thick tempered glass film, covering the main area of ​​the phone screen and providing high-strength drop resistance; the second film 12 is a 0.1mm thick PET soft film, with its edges extending 3mm beyond the top, bottom, left, and right sides of the first film 11, forming four adhesive edges 121; the inner surface of the adhesive edges 121 facing the first film 11 is coated with an acrylic adhesive layer, and the surface is covered with a silicone release film 122, which needs to be removed during installation. The PET release film 122 is adhered to the surface of the first film 11 to protect the tempered glass surface from scratches.

[0054] Example 2

[0055] Based on Example 1, such as Figures 4 to 8 As shown, it also includes a frame 2; the frame 2 is used to snap onto the edge of the device to which the film is to be applied, and the frame 2 is bonded to the adhesive edge 121. In some embodiments, the frame 2 includes two sections, which are respectively bonded to the adhesive edges 121 at both ends of the second film 12. It is suitable for edge protection along the long axis of tablets, foldable screen devices, etc. The two adhesive edges 121 fix the upper and lower ends of the device respectively, retaining the operating areas on the left and right sides, such as the bending area of ​​a foldable screen, balancing protection and flexibility of use; reducing unnecessary coverage by the frame 2, reducing the weight of the protective case, and improving portability.

[0056] In some designs, the frame 2 comprises three sections, which are connected end-to-end to form a C-shaped structure and bonded to the adhesive edge 121 on the side of the second membrane 12, adapting to a foldable screen, such as... Figure 8 As shown.

[0057] In this embodiment, as Figure 4 , 5 As shown, the frame 2 includes four sections, which are connected end to end to form an orifice-shaped structure and are bonded to the adhesive edges 121 around the second diaphragm 12.

[0058] In some embodiments, the adhesive edge 121 extends to the side edge of the phone to enhance the contact surface between the frame 2 and the adhesive edge 121, thereby enhancing the stability of the bonding.

[0059] like Figure 6 , 7 As shown, a stepped structure 21 is provided at the bonding point between the inner side of the frame 2 and the protective film 1. The stepped structure 21 is used to accommodate the height difference between the first film 11 and the adhesive edge 121. The height of the stepped structure 21 matches the thickness of the first film 11, making the inner side of the frame 2 flush with the surface of the film, eliminating the "stepped" feel of traditional protective cases, resulting in a smooth feel when holding the device, especially improving the smoothness of edge-sliding operations on curved screen devices. The stepped design 21 fills the height difference between the adhesive edge 121 and the first film 11, forming a continuous support surface, reducing warping deformation of the film edge due to uneven stress, and improving the overall structural reliability. When the protective case is slipped onto the phone 3 from the back, it can be used... Figure 7 In this design, the first diaphragm 11 is a soft membrane, and the second diaphragm 12 is a tempered glass membrane. For example... Figure 4 As shown, when the protective case is slipped onto the phone 3 from the front, it can be used... Figure 6 In this design, the first diaphragm 11 is a tempered glass film, and the second diaphragm 12 is a soft film.

[0060] To gain a more thorough and comprehensive understanding of the disclosure of this utility model, its principles will be further explained below in conjunction with its usage.

[0061] like Figure 4 , 5 As shown in Figure 6, the first film 11 is a tempered glass film that covers the main body of the mobile phone screen 3; the second film 12 is a TPU soft film with its edges extending 5mm beyond the four sides of the first film 11, forming four adhesive edges 121; the inner adhesive layer of the adhesive edge 121 is covered with a silicone release film 122, and a PET release film 122 is pasted on the surface of the second film 12 to protect the soft film.

[0062] The protective shell consists of four sections: an upper frame 23, a lower frame 25, and left and right side frames 24, which are connected end to end to form a closed structure. It is made of ABS material. The inner side of the frame 2 has a stepped structure 21 around its entire circumference, the height of which matches the thickness of the first diaphragm 11, which is 0.3mm thick, and the width of which matches the adhesive edge 121, which is 5mm wide. The outer side of the frame 2 has an anti-slip texture to improve grip friction.

[0063] During installation, remove the release film under the second film 12, attach the film to the screen of the phone 3, then remove the release film 122 from the adhesive edge 121. Press the frame 2 of the protective case into the phone 3 along its edge. The adhesive edge 121 adheres to the inside of the frame 2, forming a full-coverage protective structure. The snap-on edge 22 of the frame 2 secures the back of the phone 3. The stepped structure 21 makes the inside of the frame 2 flush with the surface of the tempered glass film, with a smooth edge transition and no height difference. The full-coverage design covers all edges of the screen, effectively preventing dust and liquid intrusion, making it suitable for use in harsh outdoor environments. The closed frame 2 evenly distributes impact force, improving drop resistance, and its edge protection capability is more than 40% higher than traditional solutions.

[0064] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0065] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0066] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. An anti-sticking protective film, characterized by: It includes a first membrane (11) and a second membrane (12) that are attached to each other. The side edge of the second membrane (12) extends beyond the side edge of the first membrane (11), and the extended portion forms an adhesive edge (121). The adhesive edge (121) has an adhesive film layer on the side surface facing the first membrane (11).

2. The anti-adhesive protective film according to claim 1, characterized in that: The mucosal layer is also adhered with a release film (122).

3. The anti-adhesive protective film according to claim 1, characterized in that: The first membrane (11) or the second membrane (12) is attached with a release film.

4. The anti-adhesive protective film according to claim 1, characterized in that: The adhesive edge (121) has two or more sections.

5. The anti-adhesive protective film according to claim 1, wherein: The first diaphragm (11) is a tempered glass film, and the second diaphragm (12) is a soft film.

6. A protective case comprising the anti-stick protective film according to any one of claims 1 to 5, characterized by: It also includes a frame (2); the frame (2) is used to snap onto the edge of the device to be coated, and the frame (2) is bonded to the adhesive edge (121).

7. The protective case of claim 6, wherein: The frame (2) consists of two sections, which are respectively bonded to the adhesive edges (121) at both ends of the second diaphragm (12).

8. The protective case of claim 6, wherein: The frame (2) comprises three sections, which are connected end to end to form a C-shaped structure and are bonded to the adhesive edge (121) on the side of the second diaphragm (12).

9. The protective case of claim 6, wherein: The frame (2) comprises four sections, which are connected end to end to form an orifice-shaped structure and are bonded to the adhesive edges (121) around the second diaphragm (12).

10. The protective case of claim 6, wherein: The inner side of the frame (2) is provided with a stepped (21) structure at the bonding point with the protective film (1). The stepped (21) structure is used to accommodate the height difference between the first film (11) and the adhesive edge (121).

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