A shell membrane connected protective shell

Abstract

The utility model discloses a kind of shell membrane connected protective shell, to solve the shell membrane separation of existing folding screen protection device, hinge protection is insufficient, operation jam and the problems such as protective film edge lifting. The protective shell includes first membrane body and second membrane body, first membrane body covers folding screen mobile phone screen by second membrane body, forms basic screen protection;Second membrane body extends to mobile phone hinge direction and forms connecting piece, connecting piece is pasted with second body back around hinge, realizes dustproof scratchproof protection to hinge. Connecting piece can be provided with rear shell wrapping second body, first membrane body or second membrane body can be provided with frame shell wrapping first body, rear shell and frame shell are cooperated to form all-around wrapping. Second membrane body is made of 0.05-0.5mm high molecular polymer, first membrane body is made of high molecular polymer or tempered glass. The utility model improves the operation fluency, reduces the protective film edge lifting phenomenon, enhances overall protection and structural stability, prolongs the service life of mobile phone.

Description

Technical Field

[0001] This utility model relates to the field of mobile terminal accessories technology, and in particular to a protective film device for foldable screen mobile phones. Background Technology

[0002] With the increasing popularity of foldable screen phones, users' demand for screen protection is rising. Existing foldable screen protection devices mostly adopt a one-piece square frame structure, with the left, right, top, and bottom bezels having the same thickness and fitting tightly to the screen edges, which presents the following problems:

[0003] Operational lag: "Swipe left to go back" and "Swipe right to switch" are high-frequency operations on foldable screens, requiring users to slide their fingers from the edge of the screen inwards. Due to their considerable thickness, the left and right bezels of the existing protective frame create noticeable protrusions at the screen edges, causing fingers to easily collide with or lag when swiping, severely impacting the smoothness of operation.

[0004] Screen protector edge lifting: During frequent folding of the phone, the rigid frame will exert continuous compressive stress on the edge of the screen protector, causing the protector to separate from the screen (i.e., "edge lifting") or even fall off, losing its protective function.

[0005] Insufficient hinge protection: Traditional protective frames only cover the edges of the screen, and do not adequately cover the hinge area, the core component of the foldable screen. This area is easily damaged by dust accumulation and accidental scratches, affecting the lifespan of the folding function.

[0006] The shell and membrane separate, resulting in poor protection. Utility Model Content

[0007] To address the problems of shell-film separation, insufficient hinge protection, operational lag, and protective film peeling in existing folding screen protection devices, this utility model provides a shell-film integrated protective shell. Through an integrated structural design, it achieves all-round protection for the screen, hinge, and body, while improving operational smoothness.

[0008] This utility model provides a shell-and-film integrated protective shell, which consists of a first film and a second film. The first film covers the screen of a foldable phone through the second film, forming basic screen protection. One side of the second film extends towards the phone hinge and bypasses the hinge to fit against the back of the second body. The part that overlaps with or even extends from the hinge is a connector. The connector directly wraps around the hinge area, solving the problem of insufficient hinge coverage in traditional protective devices and achieving dustproof and scratch-proof protection for the hinge.

[0009] Furthermore, to enhance the stability of the protective device and the phone, a back cover is also provided on the connector. The back cover wraps around the second body of the folding phone. Through the synergistic effect of the back cover and the connector, the protective device is fixed to the back of the phone, preventing the device from loosening or falling off due to frequent folding or bumps. There are two ways to do this: the connector is connected to the inside of the back cover, or the connector can be connected to the outside of the back cover.

[0010] Furthermore, the first or second membrane body is provided with a frame shell, which wraps around the first body of the folding phone. The mechanical fastening structure enhances the connection strength between the device and the front of the phone, and together with the back shell, forms an all-round wrapping of the front and back of the phone, improving the overall protection.

[0011] Furthermore, an auxiliary connector is provided between the connector and the back cover. The auxiliary connector can be made of flexible materials such as leather, painted soft plastic or memory metal, which can not only enhance the aesthetics of the overall structure, but also form a second layer of protection, providing double protection for the hinge. In addition to the above, the connector and the auxiliary connector can also be designed as an integrated unit to enhance practicality.

[0012] Furthermore, the second membrane is made of a polymer (such as PET or TPU) with a thickness of 0.05-0.5 mm, which combines flexibility and protection.

[0013] Furthermore, the first film is made of polymer or tempered glass, which provides the screen with wear-resistant and scratch-resistant basic protection, and enhances the overall integrity by connecting with the second film, avoiding the problem of the film falling off easily when applied separately.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Addressing insufficient hinge protection: The connector formed by the extension of the second membrane directly adheres to the hinge, effectively blocking dust from entering, preventing accidental scratches, and extending the hinge's service life.

[0016] Improved operation smoothness: The second membrane adopts a 0.05-0.5mm high-molecular polymer sheet design, which greatly reduces the protrusion at the edge of the screen, and with the smooth transition surface, it avoids the lag when sliding your finger.

[0017] Reduce protective film curling: The full-circumference adhesive structure and thin frame reduce the compressive stress on the protective film. Combined with the integrated connection between the film and the frame, it significantly reduces the risk of protective film curling or falling off during folding.

[0018] Enhanced overall protection: The frame and back cover work together to wrap around the front and back of the phone. The membrane structure forms a stable whole with the frame and connectors, solving the problem of shell-membrane separation and achieving all-round protection for the screen, hinge and body. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is an overall schematic diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 This is an exploded state diagram provided for Embodiment 2 of the present invention;

[0022] Figure 3 This is an exploded view diagram provided for Embodiment 3 of the present invention;

[0023] Figure 4 These are exploded schematic diagrams provided for embodiments 2 and 3 of this utility model;

[0024] Figure 5 These are schematic diagrams illustrating the use of embodiments 2 and 3 of this utility model.

[0025] The following are the labeling elements in the figure:

[0026] 1. First membrane body; 2. Second membrane body; 3. Connector; 4. Rear shell; 5. Frame shell.

[0027] 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

[0028] 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.

[0029] 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.

[0030] Example 1

[0031] like Figure 1As shown, the core of this utility model lies in constructing an integrated "screen-hinge" protection system, fundamentally breaking the design limitations of traditional "shell-film separation". The first film 1, as the protective layer directly in contact with the screen, requires a material selection that balances protective performance and user experience. If tempered glass is used, the thickness is strictly controlled between 0.1 and 0.3 mm. This thickness allows for chemical strengthening to increase the surface hardness to above Mohs 7, effectively resisting scratches from hard objects such as keys and sand during daily use, while also preventing a decrease in touch sensitivity due to excessive thickness. The edges are finished with a 2.5D curved surface polishing process, minimizing any discomfort when the film contacts the fingers, ensuring comfort even during prolonged use. Alternatively, if PET polymer is used, the thickness is set at 0.15–0.2 mm. This material offers better flexibility, better adapting to the curvature changes of the foldable screen during opening and closing. Its surface hardness reaches above 3H after hardening treatment, ensuring wear resistance while also providing some fingerprint resistance, reducing the frequency of daily wiping.

[0032] The second membrane 2, serving as a crucial component connecting the first membrane 1 and the hinge protection, is made of flexible TPU material with a thickness between 0.05 and 0.5 mm, preferably 0.1 to 0.2 mm. This material has an elongation at break of no less than 300% and has been tested to withstand 100,000 repeated folds from 0 to 180 degrees without cracking, fully meeting the daily usage needs of foldable screen phones. Simultaneously, the TPU material possesses a certain degree of impact resistance, withstanding the impact of a 64g steel ball from a height of 1 meter in a drop ball impact test, providing additional cushioning protection for the screen edges and hinge area. The right side of the second membrane 2 is seamlessly bonded to the first membrane 1 using UV-cured adhesive, with the flatness error of the bonding surface controlled within 0.01 mm, ensuring no air bubbles are generated in the screen coverage area, avoiding impact on visual effects and touch experience. The left side extends along the natural curvature of the phone hinge towards the hinge, forming a protective structure surrounding the hinge (i.e., connector 3), fundamentally solving the problem of traditional protective devices failing to cover the hinge.

[0033] Regarding the hinge protection mechanism, the second membrane 2 does not simply cover the hinge surface, but extends naturally along the hinge's curvature, bypassing the hinge axis and tightly adhering to the back of the second body, i.e., the secondary screen or back cover area of ​​the foldable phone, thus forming a continuous protective closed loop of "screen-hinge-back". The gap between the (connector 3) and the hinge surface is controlled within 0.05mm. In terms of the fixing process, a full-circumference bonding design is adopted. The edge of the membrane is fixed to the phone body with acrylic pressure-sensitive adhesive, with an adhesive layer thickness of 0.02–0.03mm and an initial adhesion force of no less than 5N / 25mm, ensuring that no delamination occurs within an ambient temperature range of -20℃ to 60℃. Simultaneously, the adhesive layer has micro-elasticity, capable of compensating for deformation of 0.1–0.3mm as the phone folds, preventing the membrane from cracking due to rigid tension and ensuring the durability of the protection.

[0034] Example 2

[0035] like Figure 2 , Figure 5 As shown, a back cover 4 is added to Example 1 to enhance the stability of the protective device and the phone, while improving back protection. This makes it suitable for scenarios requiring high durability, such as outdoor use and frequent carrying. The back cover 4 is made of a composite material of polycarbonate (PC) and glass fiber in a 7:3 ratio, with a thickness of 1.2–1.5 mm and a density not exceeding 1.3 g / cm³. 3 This material combination ensures the impact resistance of the back cover 4, allowing it to withstand a 1.5-meter drop onto a concrete surface without damage, while effectively controlling the overall weight, with each cover weighing no more than 20g, avoiding excessive burden on the phone. The back cover 4 has a matte spray-painted surface with an anti-slip coefficient of no less than 0.6, effectively reducing the risk of slipping while holding the phone and improving safety.

[0036] The back cover 4 covers the back and side edges of the phone's second body. The sides have designated areas for the volume and power buttons, ensuring smooth operation and clear tactile feedback. The bottom retains a cutout area for the charging port and speaker, with rounded edges to prevent scratching the charging cable or affecting sound transmission. The back cover 4 can be connected to the second screen protector 2 in several ways: a unibody design or adhesive bonding. A unibody design creates an inseparable unit with higher structural strength, suitable for users seeking ultimate protection. Adhesive bonding uses high-strength epoxy adhesive with a bonding strength ≥10MPa and supports a detachable design for easy maintenance or screen protector replacement, balancing practicality and convenience.

[0037] Example 3

[0038] like Figure 3 , Figure 5As shown, based on Embodiment 2, the first membrane 1 and the frame shell 5 are integrated into a single design. The frame shell 5 protects the first body of the folding phone. A mechanical fastening structure enhances the connection strength between the device and the front of the phone, forming a comprehensive wrap around both sides of the phone in conjunction with the back shell 4, further improving overall protection. The frame shell 5 uses the same PC / glass fiber composite material as the back shell 4, with a thickness of 1.0–1.2 mm and a weight not exceeding 18g, ensuring that increased protection does not excessively increase the overall weight of the phone. The frame shell 5 covers the front frame and part of the back edge of the first body. The connection with the first membrane 1 uses a hot-melt welding process, with a weld strength ≥8MPa, ensuring a strong connection that will not separate due to frequent opening and closing.

[0039] The mechanical fastening structure is located at the top and bottom of the phone, with a fastening depth of 0.5–0.8mm and a fastening force of 3–5N. This ensures a tight fit between the frame shell 5 and the phone while facilitating user installation and removal. The inner side of the frame shell 5 features a cushioning pad made of EVA foam, 0.3–0.5mm thick, with a Shore hardness of 30–40A. This effectively absorbs external impacts, reducing the risk of damage during drops. In a 1-meter drop test, phones equipped with both the frame shell 5 and the back shell 4 showed a 60% reduction in screen breakage compared to phones using only a protective film, with body deformation controlled to within 0.1mm, demonstrating significantly improved protection.

[0040] The synergistic effect of the frame shell 5 and the back shell 4 creates a complete protective loop on both the front and back of the phone, solving the problem that traditional protective devices can only protect one side. In simulated daily use wear tests (using an abrasion tester, 500g load, 1000 cycles), the surface wear of the frame shell 5 and the back shell 4 is ≤0.01mm, maintaining excellent appearance and protective performance. Meanwhile, the design of the frame shell 5 at the screen edge echoes the second membrane 2, with the protrusion height also controlled within 0.1mm, ensuring that smooth operation is not affected. Users can barely feel the presence of the frame shell 5 during use, yet enjoy all-around protection.

[0041] All of these fall within the protection scope of the claims of this utility model.

[0042] 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.

[0043] 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.

[0044] 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. A protective shell with an integrated membrane, characterized in that: It includes a first membrane (1) and a second membrane (2). The first membrane (1) covers the mobile phone screen through the second membrane (2). The second membrane (2) extends to one side to form a connector (3). The connector (3) is attached to the back of the second body to protect the hinge when the mobile phone is folded.

2. The protective shell with integrated membrane as described in claim 1, characterized in that: The connector (3) is also provided with a back cover (4), which wraps the second body of the folding phone.

3. A protective shell with an integrated membrane as described in claim 1 or 2, characterized in that: The first membrane (1) or the second membrane (2) is provided with a frame shell (5), which wraps the first body of the folding mobile phone.

4. The protective shell with integrated membrane as described in claim 2, characterized in that: An auxiliary connector is provided between the connector (3) and the rear shell.

5. The protective shell with integrated membrane as described in claim 1, characterized in that: The second membrane (2) is made of a polymer and has a thickness of 0.05-0.5 mm.

6. The protective shell with integrated membrane as described in claim 1, characterized in that: The first membrane (1) is made of polymer or tempered glass.

Images