Laminating tool for large-size display curved screen

Abstract

The utility model relates to the technical field of curved screen film covering, and particularly discloses a fitting tool for a large-size display curved screen, which comprises an adsorption platform, a positioning platform, a film covering platform and a film covering platform, and is characterized in that the adsorption platform is suitable for fixing a curved cover plate; the pressing jig is suitable for attaching the flexible film to the curved surface cover plate; the tensioning device is suitable for fixing the flexible film between the adsorption platform and the pressing jig; and when the pressing jig moves towards the curved surface cover plate, the tensioning device is configured to move towards the middle part, so that the flexible film has a pre-deformation radian and covers the surface of the pressing jig. According to the utility model, the fitting between the flexible film and the pressing jig is more uniform, the tensile forces of the flexible film attached to different positions of the surface of the pressing jig can be ensured to be the same, bubbles and wrinkles pressed on the curved surface cover plate are fewer, and the fitting effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of curved screen coating, and in particular to a laminating tool for a large-size curved display screen. Background Art

[0002] With the rapid progress of flexible display technology, its penetration in many display application fields is deepening, especially with its unique advantage of being bendable and foldable, which has prompted the display interface to develop in a more diversified and curved direction. This trend has not only spawned many innovative flexible products, such as the curved screen smartphones that have been widely marketed, but also has a profound impact on the field of in-vehicle displays, prompting in-vehicle products to evolve in the direction of large-size, special-shaped curved screens.

[0003] Compared with portable devices such as smartphones, the screen size requirements of in-vehicle display systems are significantly higher, usually requiring a size of 1 meter or even larger, and these screens often need to be designed into non-traditional, complex curved shapes to adapt to the interior space and design aesthetics of the vehicle. This combination of large size and complex curves poses unprecedented challenges to the screen's production process, material selection, and final bonding technology.

[0004] Specifically, bubble control, wrinkle elimination and long-term stability during the screen bonding process are particularly important. Traditional screen bonding technology is powerless when faced with such high requirements for large-sized, irregular curved screens. For example, patent number CN215333835U discloses a large-sized curved screen full bonding device, which uses a curved hub to bond a flexible film to the display screen. During the bonding process, a large number of bubbles and wrinkles are easily generated, which seriously affects the display effect and product quality, and may even shorten the service life of the product.

[0005] Therefore, it is necessary to propose an efficient, precise, and low-defect bonding technology suitable for large-size special-shaped curved screens. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the utility model provides a bonding tool for a large-size display curved screen. Before the pressing jig presses the flexible film onto the curved cover plate, the tensioning device allows the flexible film to have a pre-deformation, which conforms to the characteristics of the large-size flexible film, and the tension of the tensioning device remains unchanged after the deformation. The flexible film is bonded to the curved cover plate through the extrusion deformation of the pressing jig, so that there are fewer bubbles and wrinkles when it is pressed onto the curved cover plate, thereby improving the bonding quality.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] The utility model provides a laminating tool for a large-size curved display screen, comprising: an adsorption platform, which is suitable for fixing a curved cover plate; and a pressing fixture, which is suitable for laminating a flexible film on the curved cover plate; and also comprises: a tensioning device, which is suitable for fixing the flexible film between the adsorption platform and the pressing fixture;

[0009] Wherein, when the pressing jig moves toward the curved cover plate, the tensioning device is configured to move toward the middle so that the flexible film has a pre-deformed arc and covers the surface of the pressing jig.

[0010] Furthermore, before the pressing jig abuts against the curved cover plate, the flexible film gradually covers the surface of the pressing jig from the middle to the surroundings.

[0011] Furthermore, during the process of the pressing jig pressing the flexible film onto the curved cover plate, the tensioning device is configured to gradually relax the flexible film so that the pressing jig squeezes the flexible film onto the curved cover plate.

[0012] Furthermore, the flexible film has two tensioning ends, and the tensioning device tensions the flexible film via the two tensioning ends.

[0013] Furthermore, it also includes a motor, which is used to drive the tensioning device to tighten or loosen the flexible film.

[0014] Furthermore, the adsorption platform has a limiting portion to position the curved cover plate.

[0015] Furthermore, the adsorption platform includes a negative pressure device to fix the curved cover plate after it is placed on the limiting portion.

[0016] Furthermore, a projection of the flexible film in the laminating direction is located within the laminating jig.

[0017] Furthermore, the pressing jig has a concave portion adapted to the curved cover plate.

[0018] Furthermore, it also includes a base, and the pressing jig is configured to be movably fixed on the pressing jig.

[0019] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0020] 1. In the large-size display curved screen bonding tool of the utility model, before the flexible film is bonded to the curved screen, the flexible film is evenly covered on the surface of the pressing jig under the control of the tensioning device, so that the tensioning force of the flexible film attached to different positions on the surface of the pressing jig can be kept the same. When the pressing jig moves toward the curved cover plate, the flexible film is gradually relaxed under the control of the tensioning device, so that the pressing jig can use its own deformation to better attach the flexible film to the curved cover plate, so that there are fewer bubbles and wrinkles when it is pressed on the curved cover plate.

[0021] 2. The large-size curved screen bonding tooling of the utility model is composed of a pressing jig, an adsorption platform and a tensioning device. During the bonding process, the curved cover plate remains unchanged, and the pressing jig abuts against the flexible film and moves toward the curved cover plate, which can ensure the stability of the curved cover plate during the bonding process and also ensure the consistency of batch coating of the curved cover plates; the batch production has good consistency and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0023] Figure 1 It is a structural schematic diagram of the curved screen laminating tooling of the utility model.

[0024] Figure 2 It is a schematic diagram of the structure of the adsorption platform of the utility model.

[0025] Figure 3 It is a front view of an embodiment of the curved screen laminating tooling of the utility model.

[0026] Figure 4 A top view of the tensioning device of the utility model and the flexible membrane in a tensioned state.

[0027] Figure 5 A schematic diagram of the flexible film of the utility model before being attached to the pressing fixture.

[0028] Figure 6 It is an exploded schematic diagram of the curved screen laminating tooling of the utility model.

[0029] Figure numerals: 1. adsorption platform; 11. negative pressure suction port; 2. curved cover plate; 3. tensioning device; 4. flexible membrane; 5. pressing fixture; 6. fixed stopper; 7. base. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] Unless otherwise defined, the technical terms or scientific terms used in this patent document shall be the common meanings understood by people with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the utility model patent specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantity limit, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0035] See also Figure 1-Figure 6As shown, this embodiment provides a bonding tool for a large-size curved display screen, which includes an adsorption platform 1, a tensioning device 3 and a pressing jig 5, wherein the adsorption platform 1 is used to fix the curved cover plate 2, which is located at the top of the device; the tensioning device 3 is used to fix the flexible film 4, and make the flexible film 4 be located between the curved cover plate 2 and the pressing jig 5, and during bonding, the pressing jig 5 and the adsorption platform 1 cooperate with each other to make the flexible film 4 bonded to the curved cover plate 2, thereby completing the film bonding operation of the curved cover plate 2.

[0036] See also Figure 2 As shown, the adsorption platform 1 is made of metal material, which has high strength and can effectively fix the curved cover plate 2; preferably, the adsorption platform 1 has a limiting portion to position the curved cover plate 2; the limiting portion is constituted as an arc-shaped bottom wall at the bottom of the adsorption platform 1, and the curvature of the arc-shaped bottom wall is adapted to the curvature of the curved cover plate 2, so as to position the curved cover plate 2; further, it also includes a negative pressure device (not shown in the figure), which can fix the curved cover plate 2 after it is placed on the limiting portion, and the adsorption platform 1 has a plurality of negative pressure suction ports 11, which are evenly distributed on the curved bottom wall surface, and negative pressure is generated by the negative pressure device and the curved cover plate 2 is fixed by the negative pressure suction port 11, so as to ensure the stability of the placement of the curved cover plate 2 and avoid displacement during the bonding process to affect the quality of the film. Of course, in other embodiments, the curved cover plate 2 can also be fixed to the adsorption platform 1 by bonding or magnetic attraction.

[0037] In this embodiment, the projection of the flexible film 4 in the bonding direction is located within the pressing jig 5, ensuring that the pressing jig 5 can accurately fit the flexible film 4 to the curved cover plate 2; further, the flexible film 4 has two tensioning ends, and the tensioning device 3 tightens the flexible film 4 through the two tensioning ends, so as to be suitable for fixing the flexible film 4 between the adsorption platform 1 and the pressing jig 5, and ensure the flatness of the surface of the flexible film 4; it also includes a motor (not shown in the figure), which is used to drive the tensioning device 3 to tighten or loosen the flexible film 4, so as to cooperate with the pressing jig 5 to squeeze the flexible film 4 to fit on the curved cover plate 2. It should be noted that the motor can be a reduction motor, which drives the tensioning devices 3 on both sides to move closer or farther synchronously through a threaded screw or a connecting rod mechanism; of course, the motor can also be a linear motor, etc., as long as it can realize a motor device that drives the tensioning device 3 to move in the horizontal direction. Preferably, the tensioning device 3 is configured as a fixing clamp suitable for clamping the flexible membrane 4. The fixing clamp is a common device in the art and has the function of clamping or releasing the flexible membrane 4, which will not be described in detail here.

[0038] Furthermore, the laminating tool also includes a base 7, and the laminating jig 5 is configured to be movably fixed on the laminating jig 5, so that the position, model, etc. of the laminating jig 5 can be adjusted according to the size and type of the curved cover plate 2 and the flexible film 4, so as to meet the laminating requirements of different types of flexible films 4 and curved cover plates 2. The flexible film 4 can be a special-shaped structure or a square structure with a regular shape, etc., and has a wide range of applications; further, the base 7 is made of metal material, and the base 7 and the laminating jig 5 are slidably matched through a guide groove and a guide column, one of which is provided on the base 7, and the other is provided at the bottom of the laminating jig 5. Under the cooperation of the guide groove and the guide column, the position of the laminating jig 5 can be changed according to the use requirements; in addition, the base 7 also has fixed blocks 6 on both sides for fixing the laminating jig 5. After the laminating jig 5 is fixed on the base 7, the fixed blocks 6 abut against both sides of the laminating jig 5, and then are fixed to the base 7 by bolts, thereby fixing the laminating jig 5. The main body of the pressing jig 5 is made of elastic material, such as elastic silicone, flexible inflatable material, etc. In this embodiment, it is mainly made of silicone material. During movement, the pressing jig 5 squeezes the flexible film 4 through its own deformation to achieve a fitting effect. Furthermore, the pressing jig 5 has a recessed portion that is adapted to the curved cover plate 2 so that the flexible film 4 can be better squeezed and fitted onto the curved cover plate 2.

[0039] See also Figure 1 As shown, Figure 1 The schematic diagram of the structure of the curved screen laminating tooling is shown. Before the pressing jig 5 presses the flexible film 4 onto the curved cover plate 2, the tensioning device 3 uses a constant tensioning force to tighten the flexible film 4. When the pressing jig 5 moves toward the curved cover plate 2, the tensioning device 3 is configured to be able to move in the horizontal direction and toward the middle to follow the gravity sag of the flexible film 4 to produce a pre-deformation arc corresponding to the pressing jig 5; due to the size and shape of the flexible film 4, it has a self-sag arc when it is pulled up by the tensioning device 3, so When the curved cover plate 2 and the flexible film 4 are ready to be bonded together, the tensioning device 3 will move inwards towards each other to push the flexible film 4 into a certain arc, which corresponds to the pressing jig 5 and also corresponds to the curved cover plate 2. In this way, before the pressing jig 5 abuts against the curved cover plate 2, the flexible film 4 can gradually cover the surface of the pressing jig 5 from the middle to the surrounding areas, and the tensioning device 3 tightens the flexible film 4 with a constant tensioning force, which can ensure that the flexible film 4 is evenly and well covered on the pressing jig 5 and further bonded to the curved cover plate 2.

[0040] When the pressing jig 5 contacts the flexible film 4 and approaches the curved cover plate 2, the relative position of the tensioning device 3 and the pressing jig 5 remains unchanged, which can effectively keep the flexible film 4 in a pre-deformed state, effectively avoiding the problem of bubbles and wrinkles caused by the early contact between the flexible film 4 and the curved cover plate 2 during the bonding process, thereby improving the bonding quality of large-size curved screens and ensuring the consistency of the product. Preferably, during the process of the pressing jig 5 pressing the flexible film 4 on the curved cover plate 2, the tensioning device 3 is configured to gradually relax the flexible film 4 so that the pressing jig 5 can use its own deformation to squeeze the flexible film 4 onto the curved cover plate 2.

[0041] Curved screen lamination tooling working process and principle:

[0042] When the curved cover plate 2 and the flexible film 4 are fitted together, the tensioning device 3 will move toward each other in accordance with the gravity of the large-sized flexible film 4 to push the flexible film 4 into a concave arc, and then the pressing jig 5 will slowly move upwards through the control of the motor to allow the flexible film 4 to adhere to the lower pressing jig 5. At this time, the curved cover plate 2 is fixed on the adsorption platform 1, and the pressing jig 5 will continue to move upwards against the flexible film 4 until it contacts the curved cover plate 2. During the fitting process, the surrounding positions of the pressing jig 5 are gradually fitted with the curved cover plate 2, which can further discharge the air between the flexible film 4 and the curved cover plate 2 to prevent the formation of bubbles and wrinkles. At the same time, during the extrusion process, the tensioning device 3 will also slowly loosen. Finally, the flexible film 4 is completely fitted to the curved cover plate 2 through the deformation and extrusion of the pressing jig 5, thereby completing the fitting process of the flexible film 4. After the pressing is completed, the base 7 drives the pressing jig 5 to move away from the curved cover plate 2 and separate from the curved cover plate 2 , and the flexible film 4 is attached to the surface of the curved cover plate 2 .

[0043] Since the flexible film 4 has a pre-deformation with the same curvature as the curved cover plate 2 before lamination, there are fewer bubbles and wrinkles during the lamination process, and the product consistency is better, which is conducive to mass production.

[0044] Of course, in other embodiments, the tensioning device 3 can also be tightened by an elastic device, and the elastic device can be, for example, a spring or elastic rubber. The pressing jig 5 can attach the flexible film 4 to the surface of the curved cover plate 2 in the form of air pressure. During the working process, the base 7 and the pressing jig 5 can remain stationary, and the adsorption platform 1 drives the curved cover plate 2 to move downward for bonding. Alternatively, the pressing jig 5 and the adsorption platform 1 move toward the middle together to complete the film bonding work.

[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A laminating tool for a large-size curved display screen, comprising: An adsorption platform, which is suitable for fixing the curved cover plate; as well as A pressing jig, which is suitable for laminating a flexible film on a curved cover plate; characterized in that: It also includes: a tensioning device, which is suitable for fixing the flexible film between the adsorption platform and the pressing jig; Wherein, when the pressing jig moves toward the curved cover plate, the tensioning device is configured to move toward the middle so that the flexible film has a pre-deformed arc and covers the surface of the pressing jig.

2. The laminating tool according to claim 1, characterized in that: Before the pressing jig abuts against the curved cover plate, the flexible film gradually covers the surface of the pressing jig from the middle to the surroundings.

3. The laminating tool according to claim 1, characterized in that: During the process of the pressing jig pressing the flexible film onto the curved cover plate, the tensioning device is configured to gradually relax the flexible film so that the pressing jig squeezes the flexible film onto the curved cover plate.

4. The laminating tool according to claim 1, characterized in that: The flexible film has two tensioning ends, and the tensioning device tensions the flexible film via the two tensioning ends.

5. The laminating tool according to any one of claims 1 to 4, characterized in that: A motor is also included, which is used to drive the tensioning device to tighten or relax the flexible film.

6. The laminating tool according to claim 1, characterized in that: The adsorption platform has a limiting portion to position the curved cover plate.

7. The laminating tool according to claim 6, characterized in that: The adsorption platform includes a negative pressure device to fix the curved cover plate after it is placed on the limiting portion.

8. The laminating tool according to claim 1, characterized in that: The projection of the flexible film in the laminating direction is located within the laminating jig.

9. The laminating tool according to claim 1, characterized in that: The pressing fixture has a concave portion matched with the curved cover plate.

10. The laminating tool according to claim 1, characterized in that: A base is also included, and the pressing jig is configured to be movably fixed on the pressing jig.

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