A flexible film applicator compatible with different device sizes and film sizes

Abstract

This utility model discloses an elastic screen protector compatible with different device sizes and film sizes. It includes a straight frame connected by corner elastic elements, forming an elastically expandable cavity. The inner side of the straight frame has an edge positioning surface and a height stop. Several inclined elastic cylinders with spherical or arc-shaped surfaces are arranged on the straight frame. This structure allows the cylinders to both support and guide the tempered glass film in a point-contact manner, and to elastically deform and uniformly retract under pressure, ensuring a perfect fit between the film and the screen. The corner elastic elements, through their beveled design, allow the cavity to expand adaptively, accommodating devices of different sizes. The screen protector is integrally injection molded from elastic materials such as plastic, and the frame also has protrusions and slots for stacking. This utility model achieves synchronous compatibility between the device and the film through a dual elastic structure, offering significant advantages such as precise positioning, easy operation, bubble-free application, and convenient transportation and storage.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone screen protector application auxiliary tools, and in particular to an elastic positioning screen protector applicator that is compatible with mobile phones of different sizes and tempered glass screen protectors. Background Technology

[0002] In the consumer electronics industry, applying screen protectors (such as tempered glass screen protectors) to devices like mobile phones and tablets has become commonplace. Traditional screen protector positioning frames are usually designed for specific models, resulting in the drawback of "one mold per device." This leads to high mold development costs, complex warehousing management, and an inability to adapt to the market demands of rapidly iterating electronic device models.

[0003] While some existing technologies offer screen protector applicators that can adapt to different phone sizes, such as those using corner elastic structures, these solutions generally have shortcomings in the film positioning process. Most use fixed bevels or curved surfaces to support the film, which have limited deformation capabilities and cannot accommodate films with significant size differences. Furthermore, during the film pressing and application process, traditional support structures cannot provide even displacement, easily leading to uneven stress on the film, air bubbles, or positioning misalignment.

[0004] Therefore, there is an urgent need in this field for a universal film applicator that can adapt to devices of different sizes, be compatible with films of different sizes, and ensure uniform force and accurate positioning during film application. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model aims to provide an elastic film applicator compatible with different device sizes and film sizes. Its core objective is to solve the problems of adaptive support and uniform positioning of the film through an inclined elastic cylinder, and to achieve precise positioning of devices of different sizes through small-range elastic structures at the four corners, ultimately achieving the effect of "universal mobile phone, universal film".

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An elastic screen protector compatible with different device sizes and film sizes includes several straight frames connected by corner elastic members to form an elastically expandable accommodating cavity for accommodating the device to be covered. The inner side of each straight frame is provided with an edge positioning surface for clamping and positioning the side of the device and a height stop for positioning the top of the device. Several inclined elastic cylinders are provided on each straight frame, fixed to the frame with their axes forming an acute angle with the frame plane. These cylinders support the tempered glass film and guide its descent, and under pressure, they can elastically deform to allow the tempered glass film to adhere to the device screen.

[0007] Preferably, the cylindrical surface of the elastic cylinder is a spherical or arc-shaped surface, and it always contacts the tempered film in a point-contact manner during the pressing process to ensure uniform force distribution.

[0008] Furthermore, the top of the corner elastic element is inclined from the outside towards the center of the accommodating cavity to form a slope, which facilitates the insertion of the device and guides the expansion of the accommodating cavity.

[0009] Furthermore, the number of corner elastic elements is four, and the shape of the corner elastic elements is selected from any one of square, semi-circular, V-shaped, wavy, or U-shaped.

[0010] Furthermore, the straight frame is provided with protrusions and slots for interlocking when multiple film applicators are stacked, preventing displacement or deformation during transportation.

[0011] Furthermore, the straight frame, corner elastic elements, and elastic cylinder are integrally molded by injection molding, preferably using elastic materials such as ABS or PC.

[0012] Furthermore, the tilt angle of the elastic cylinder ranges from 15° to 60°.

[0013] Furthermore, the inner side of the top of the straight frame is inclined to form a diaphragm inlet surface, which is used to guide the tempered glass film to slide smoothly into the V-shaped cavity formed by the elastic cylinder.

[0014] Compared with the prior art, the present invention has the following significant advantages: Dual compatibility: The corner elastic components enable a small-range elastic adaptation to mobile phones of different sizes; the tilted elastic cylinder enables elastic support for tempered glass screen protectors of different sizes, truly achieving universal compatibility of one product with multiple devices and screen protectors.

[0015] Precise positioning and bubble-free fit: The "point contact" design of the elastic cylinder maintains local contact with the film and makes even clearance during the pressing process, effectively avoiding problems such as film displacement and bubbles caused by uneven clearance of the support structure, and greatly improving the success rate and yield of film application.

[0016] The operation is extremely simplified: users only need to slide the phone in along the inlet surface, and the receiving cavity will automatically adjust to the appropriate size; after the tempered glass screen protector is placed, it slides down along the elastic cylinder due to gravity and automatically centers itself when pressed. The elastic cylinder then smoothly retracts, making the operation process intuitive, simple, and efficient.

[0017] Robust structure, easy for commercial use: The one-piece molded structure is sturdy and durable; the unique stacking design makes the product less prone to deformation during storage and transportation, saving space, and is very suitable for sale as an accessory along with products such as mobile phone cases and screen protectors. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model; Figure 2 , 3 This is a partially enlarged schematic diagram of an embodiment of the present utility model; Figure 4 Top view provided for an embodiment of this utility model; Figure 5 , 6 A schematic diagram illustrating the use of this utility model according to an embodiment; Figure 7 A storage diagram provided for an embodiment of this utility model; Figure 8 , 9 This is a cross-sectional schematic diagram provided for an embodiment of the present utility model.

[0020] The following are the labeling elements in the figure: 1. Corner elastic element; 11. Bevel; 2. Straight frame; 21. Elastic cylinder; 22. Edge positioning surface; 221. Guide surface; 23. Height stop strip; 231. Height positioning surface; 24. Protrusion; 25. Slot; 26. Diaphragm guide surface; 3. Mobile phone; 4. Tempered glass screen protector.

[0021] 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

[0022] 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.

[0023] 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.

[0024] Please see Figures 1-9 As shown, this utility model provides an elastic film applicator compatible with different equipment sizes and diaphragm sizes. Through an innovative elastic frame structure, it simultaneously solves the size compatibility problem between both equipment and diaphragm, ensuring accuracy and convenience in the application process. The main body of the applicator is integrally molded using injection molding, preferably made of plastic materials such as ABS or PC. These materials combine good rigidity, toughness, and elasticity, providing necessary elastic deformation capacity for key components while ensuring the durability of the overall structure.

[0025] The elastic frame is formed by four straight frame edges 2 and four corner elastic elements 1 connected between them, creating a rectangular accommodating cavity that can expand and contract elastically. Each corner elastic element 1 is designed as a U-shaped structure with good elasticity, its top extending naturally from the outside towards the center of the cavity and sloping to form a slope 11, which allows the user to easily expand the cavity by pressing and pulling with their fingers. When the user places the phone 3 into the cavity from the bottom, the edge of the device first contacts the guide surface 221 of the edge positioning surface 22. Under downward pressure, the corner elastic elements 1 expand elastically outward, thereby allowing the size of the entire cavity to adaptively adjust to tightly accommodate devices of different widths. This ingenious structural design allows a single screen protector applicator to adapt to multiple phone models within a certain size range, greatly improving the product's versatility and practicality.

[0026] For precise device positioning, the inner side of the straight frame 2 features a multi-positioning structure. An inclined guide surface 221 is machined on the inner bottom of the frame. This inclined surface ensures that the device is smoothly guided to the correct position upon initial insertion, avoiding hard impacts and equipment damage. Above the guide surface 221 is an edge positioning surface 22 for clamping the side of the device. In some embodiments, the edge positioning surface 22 adopts an inclined design, with its bottom converging towards the center of the receiving cavity and its top slightly expanding outward, forming a structure similar to an inverted "V". This special structure allows for the application of a stable, center-to-center clamping force from different positions above and below the side of the device after it is fully inserted, utilizing the elasticity of the material. This effectively prevents the applicator from accidentally detaching from the device during operation, ensuring the stability of the applicator process. A height stop 23 is also provided on the top inner side of the straight frame 2. Its lower surface forms a height positioning surface 231. When the top of the device contacts this surface, precise vertical positioning of the device is achieved. The horizontal clamping of the edge positioning surface 22 and the vertical limiting of the height stop bar 23 together achieve precise three-dimensional positioning of the equipment in the accommodating cavity, laying a solid foundation for subsequent film application operations.

[0027] like Figure 2As shown, the inner top of the straight frame 2 is inclined to form a film guide surface 26, which guides the tempered glass film 4 to smoothly slide into the V-shaped cavity formed by the elastic cylinder 21. When the tempered glass film 4 is placed horizontally, it will be supported by the film guide surface 26. Even if the film is slightly tilted, it doesn't matter. The height difference caused by one end being higher than the other is only 0.4-1.2 mm. Within the size range of mobile phones, according to trigonometric function calculations, the sum of the squares of the two sides is equal to the sum of the squares of the hypotenuse. Since the tempered glass film is tilted by at most about one millimeter, the final tilt position of the film on the screen is only a few micrometers different, which is completely within an acceptable range.

[0028] Unlike traditional solutions that use fixed inclined or curved surfaces, this invention features several inclined elastic cylinders 21 on the straight frame 2. These elastic cylinders 21 are fixed to the straight frame 2 at their roots, and are inclined forward and toward the center of the accommodating cavity, with their axis forming an acute angle with the plane of the frame. The inclination angle is preferably between 15° and 60°. The top of the elastic cylinder 21 is machined into a smooth spherical or arc-shaped surface, and because it is integrally formed with the straight frame 2, it possesses good elastic bending properties.

[0029] When the user places the tempered glass screen protector 4 on the applicator, the edges of the screen protector 4 naturally rest on several elastic cylinders 21. Since the cylinders are tilted, they provide a force pointing towards the center of the screen, guiding the screen protector 4 to smoothly and automatically slide down to the pre-positioned position directly above the screen using its own weight, completing the initial centering and greatly simplifying the user's operation. When the user presses down on the screen protector 4, it will not detach from the elastic cylinders 21 because the screen protector 4 is too long and will bend, with its long ends supported by the elastic cylinders 21. At this point, the user only needs to hold down the screen protector 4 with one hand while using the other hand to reach around the screen protector and remove the applicator. The positioning is completed the instant the screen protector is pressed down.

[0030] like Figure 7 As shown, to enhance the product's commercial usability and ease of transport, interlocking protrusions 24 and slots 25 are designed on the side wall of the straight frame 2. When multiple film applicators are stacked for storage or transport, the slots 25 of the upper film applicator will precisely engage with the protrusions 24 of the lower film applicator, forming a stable stacking structure. This effectively prevents slippage, squeezing, and deformation during transportation, saving storage space and ensuring the product arrives in good condition, demonstrating the designer's comprehensive consideration of the entire product lifecycle.

[0031] In use, the user simply slides the phone 3 into the receiving cavity along the guide surface 221. The corner elastic element 1 automatically expands to adapt to the device size and secures it firmly. Then, the tempered glass screen protector 4 is placed on the elastic cylinder 21 through the film guide surface 26. Under the influence of gravity, the tempered glass screen protector 4 automatically slides down to the center. Finally, gently press the center of the tempered glass screen protector 4, and the elastic cylinder 21 retracts accordingly. Lift the screen protector applicator upwards to completely detach it, and the tempered glass screen protector 4 will perfectly adhere to the screen. The entire process is simple and intuitive, requiring no complicated operations, greatly reducing the barrier to screen protector application for users.

[0032] In summary, this invention achieves small-range self-adaptation of device dimensions through the corner elastic element 1, and solves the core problem of size compatibility and uniform adhesion of the tempered glass screen protector 4 through the innovative inclined elastic cylinder structure 21. Combined with a precise three-dimensional positioning system and a practical stacking design, it constitutes a truly "universal mobile phone, universal tempered glass screen protector" high-precision, high-efficiency, and high-reliability screen protector application tool. Its innovative design concept and practical structural features give it broad market prospects and promotional value in the consumer electronics accessories field.

[0033] 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.

[0034] 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.

[0035] 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 flexible film applicator compatible with different equipment sizes and film sizes, characterized in that: It includes several straight frame frames (2), which are connected by corner elastic members (1) to form an elastically expandable accommodating cavity for accommodating the device to be applied; the inner side of the straight frame frame (2) is provided with an edge positioning surface (22) and a height stop (23) for clamping and positioning the device; the straight frame frame (2) is provided with several symmetrically distributed elastic cylinders (21), which are inclined and fixed on the straight frame frame (2), and their axis forms an acute angle with the frame plane for supporting and guiding the tempered glass film (4) to fall, and generating elastic deformation when pressed, so that the tempered glass film (4) adheres to the screen.

2. The elastic film pasting device compatible with different device sizes and film sizes according to claim 1, wherein: The cylindrical surface of the elastic cylinder (21) is a spherical or arc surface, and it always contacts the tempered film (4) in a point-contact manner during the pressing process.

3. The elastic film pasting device of claim 1, wherein the elastic film pasting device is compatible with different device sizes and film sizes. The bottom inner side of the straight frame (2) is inclined to form an inlet surface (221), which is used to guide the device to smoothly insert into the receiving cavity.

4. The elastic film pasting device compatible with different device sizes and film sizes according to claim 1, wherein: The straight frame (2) is provided with protrusions (24) and slots (25) for interlocking when stacked.

5. The elastic film pasting device of claim 1, wherein the elastic film pasting device is compatible with different device sizes and film sizes. The straight frame (2), corner elastic element (1), and elastic cylinder (21) are integrally formed by injection molding.

6. The elastic film pasting device compatible with different device sizes and film sizes according to claim 1, wherein: The number of corner elastic elements (1) is 4, and the shape of the corner elastic elements (1) is selected from any one of square, semi-circular, V-shaped, wavy or U-shaped.

7. The elastic film pasting device of claim 1, wherein the elastic film pasting device is compatible with different device sizes and film sizes. The inclination angle of the elastic cylinder (21) ranges from 15° to 60°.

8. The elastic film pasting device compatible with different device sizes and film sizes according to claim 1, wherein: The inner side of the top of the straight frame (2) is inclined to form a membrane inlet surface (26), which is used to guide the tempered film (4) to slide smoothly into the V-shaped cavity formed by the elastic cylinder (21).

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