A roller compactor

Abstract

The application relates to a roller pressing device for rolling a to-be-rolled piece, which comprises a roller and a movement assembly, wherein the movement assembly is connected with the roller and used for driving the roller to roll, the roller comprises a first pressing section and a second pressing section connected with the first pressing section, the second pressing section is located on at least one side of the first pressing section in the axial direction of the roller, and the first pressing section and the second pressing section are configured as follows: the pressure of the second pressing section on the to-be-rolled piece is greater than the pressure of the first pressing section on the to-be-rolled piece. The roller pressing device can be used for applying pressure to a protective film when the protective film is pasted on a screen, and the pressure of the second pressing section on the protective film is greater, so that the connection reliability of the protective film and an edge portion of the screen can be improved, the risk that an edge section of the protective film is lifted under external force during use of the electronic equipment can be reduced, and the protection effect of the protective film on the screen is improved.

Description

Technical Field

[0001] This application relates to the field of clamping equipment technology, and in particular to a roller clamping device. Background Technology

[0002] Screen protectors are typically affixed to the screens of electronic devices. Usually, a roller clamping device is used to press the protector and screen together, improving the reliability of the connection. However, during use, the edges of the screen are frequently rubbed, causing the protector attached to the screen edges to easily peel off. Summary of the Invention

[0003] In view of this, this application provides a roller pressing device to solve the technical problem in the prior art that the protective film connected to the edge of the screen is prone to peeling up.

[0004] This application provides a roller pressing device for rolling a workpiece. The roller pressing device includes: a roller; a motion component connected to the roller for driving the roller to roll; wherein the roller includes a first pressing section and a second pressing section connected to the first pressing section, the second pressing section being located on at least one side of the first pressing section along the axial direction of the roller; the first pressing section and the second pressing section are configured such that the pressure of the second pressing section on the workpiece to be rolled is greater than the pressure of the first pressing section on the workpiece to be rolled.

[0005] In this embodiment, the component to be rolled can be a protective film, meaning the roller pressing device applies pressure to the protective film when it is adhered to the screen. When the protective film is adhered to the screen, after being pressed by the roller pressing device, the connection reliability between the edge segment of the protective film and the edge of the screen is greater than the connection reliability between the middle segment of the protective film and the first main body of the screen, and the connection reliability between the edge segment of the protective film and the second edge of the screen is greater than the connection reliability between the middle segment of the protective film and the second main body of the screen. In other words, the connection reliability between the edge segment of the protective film and the edge of the screen is greater than the connection reliability between the middle segment of the protective film and the main body of the screen. Firstly, the higher connection reliability between the edge segment of the protective film and the first edge of the screen reduces the risk of lifting due to poor adhesion between the first edge and the protective film caused by low flatness in the screen's axial area. It also reduces the risk of the edge segment of the protective film lifting under external force during the use of the electronic device, thus improving the protective effect of the protective film on the screen. Secondly, the connection between the middle section of the protective film and the main body of the screen should not be too reliable. While ensuring a reliable connection between the middle section of the protective film and the main body of the screen, the risk of light and shadow phenomena appearing on the main body of the screen should be reduced.

[0006] In one specific embodiment, the first pressurizing section includes a first support member and a first contact layer disposed on the first support member, the first contact layer being used to contact the workpiece to be rolled; the second pressurizing section includes a second support member and a second contact layer disposed on the second support member, the second contact layer being used to contact the workpiece to be rolled, and the second support member is provided with a venting groove.

[0007] In this embodiment, during the process of applying the protective film to the screen, the second contact layer of the second pressurizing section always abuts against the edge section of the protective film and rolls on the edge section, so that the edge section of the protective film is bonded to the edge of the screen under the pressing force of the second contact layer. The pressure of the gas entering between the second contact layer and the second support member is transmitted to the edge section of the protective film through the second contact layer, so that the pressing force applied by the second contact layer to the edge section is the sum of the weight of the second pressurizing section and the pressure of the gas. This results in a larger pressure applied by the second contact layer between the edge section of the protective film and the edge of the screen, improving the connection reliability between the edge section of the protective film and the edge of the screen, and reducing the risk of the edge section of the protective film lifting up during the use of electronic devices.

[0008] In one specific embodiment, the second support member includes a second support column and a second clamping part sleeved on the second support portion, the vent groove is disposed on the second support column, and / or the vent groove is disposed on the second clamping part.

[0009] In this embodiment, a first vent groove is disposed on the second support column and extends along the axial direction of the second support column, while a second vent groove extends radially along the second pressing part. The first vent groove can also have other structures. The second support column can be a solid structure, and an inclined or bent first vent groove is provided on it, allowing the first vent groove to connect to the outside and penetrate the outer wall of the second support column. The first vent groove can be an L-shaped structure. The second vent groove can also have other structures. The second pressing part is an integral structure and is provided with a second vent groove extending radially along the second pressing part. Both ends of the second vent groove penetrate the inner and outer walls of the second pressing part and communicate with the first vent groove.

[0010] In one specific embodiment, the ventilation groove includes a first ventilation groove and a second ventilation groove. The first ventilation groove is disposed on the second support column and is connected to the outside. One end of the second ventilation groove is connected to the first ventilation groove, and the other end passes through the second support member along the radial direction of the roller.

[0011] In this embodiment, the first vent groove extends along the axial direction of the roller, and the second vent groove extends radially along the roller. The axial direction of the roller can be the same as the width direction of the screen. In this embodiment, the first vent groove and the second vent groove are perpendicular.

[0012] In one specific embodiment, the inner cavity of the second support column is the first venting groove, and the outer wall of the second support column is provided with an installation part, the installation part including a first installation part and a second installation part, the first installation part and the second installation part abutting against the second contact layer, and a gap is provided between the first installation part and the second installation part along the circumference of the second support column, the gap being the second venting groove.

[0013] In this embodiment, the second support column has a hollow structure, meaning the inner cavity of the second support column is the aforementioned first venting groove. The second pressurizing section includes multiple second pressing parts, which are spaced apart circumferentially along the second support column. The second venting grooves are located between adjacent second pressing parts. That is, the second support member is provided with multiple second venting grooves, which are evenly distributed circumferentially along the second pressing parts. This allows gas to enter the second support member through the first and second venting grooves and be evenly distributed within the gap between the second contact layer and the second pressing parts. This makes the pressure acting on the second contact layer circumferentially more uniform, thereby making the pressing force of the second pressurizing section acting on the edge section of the protective film more uniform when the roller rolls along the protective film. In this embodiment, the first mounting part and the second mounting part have high strength and rigidity, and are not easily deformed during the operation of the roller pressing device. This makes the gap between the first mounting part and the second mounting part relatively stable, thereby making the structure of the second venting groove formed by the first mounting part and the second mounting part highly stable during the operation of the roller pressing device. This allows gas to enter the space between the second contact layer and the second pressing part through the second venting groove.

[0014] In one specific embodiment, the outer wall of the second support column is provided with a plurality of mounting portions distributed circumferentially, and the second support member includes a plurality of second clamping portions, each of the second clamping portions being located between adjacent mounting portions.

[0015] In this embodiment, one end of the first mounting part and the second mounting part are connected to the outer wall of the second support column, and the other end extends to abut against the second contact layer, so that the second contact layer, the two adjacent mounting parts, and the second support column enclose the mounting space. The second pressurizing section includes a plurality of second clamping parts, each of which is installed in its respective mounting space, so that the second clamping parts are limited by the adjacent mounting parts, thereby improving the positional accuracy of the second clamping parts and reducing the risk of the position of the second clamping parts shifting during the operation of the roller clamping device.

[0016] In one specific embodiment, the first support member includes a first support column and a first pressing part. The first pressing part is an integral structure and is sleeved on the first support column. The surface of the first pressing part facing away from the first support column is the first contact layer, or the first contact layer is sleeved on the outside of the first pressing part.

[0017] In this embodiment, the first contact layer and the first pressing part are separate structures, with the first pressing part providing support for the first contact layer. Alternatively, the first contact layer and the first pressing part can be integrated, with the first contact layer serving as the outer wall of the first pressing part. This eliminates the need for an additional first contact layer, reducing costs and improving assembly efficiency.

[0018] In one specific embodiment, the roller pressing device further includes an adhesive layer, through which the first pressing section and the second pressing section are bonded.

[0019] In this embodiment, an adhesive layer may be provided on the side of the first pressure section facing the second pressure section, and / or an adhesive layer may be provided on the side of the second pressure section facing the first pressure section, so that the first pressure section and the second pressure section are bonded together by the adhesive layer, thereby improving the connection reliability between the first pressure section and the second pressure section, avoiding the phenomenon of breakage between the first pressure section and the second pressure section during use, and improving the safety of the roller pressing device.

[0020] In one specific embodiment, the outer walls of the first contact layer, the second contact layer, and the adhesive layer are flush along the circumference of the roller.

[0021] In this embodiment, after the adhesive layer cures, its circumferential edge is flush with the edges of both the first and second pressure sections, meaning the roller's outline is a flat cylindrical surface. The hardness of the cured adhesive layer can be the same as that of the first and second pressure sections. When the protective film is pasted onto the screen, the adhesive layer can apply pressure to the protective film in its corresponding area, ensuring proper adhesion between the protective film and the screen in that area.

[0022] In one specific embodiment, along the axial direction of the roller, the length of the first pressurizing section is L1, the length of the second pressurizing section is L2, and L2 / L1 satisfies: 1 / 20≤L2 / L1≤1 / 10.

[0023] In this embodiment, the ratio of the length H2 of the first edge portion to the length H1 of the first main body portion can be 1 / 20 ≤ H2 / H1 ≤ 1 / 10, and the ratio of the length H2 of the second edge portion to the length H1 of the second main body portion can be 1 / 20 ≤ H2 / H1 ≤ 1 / 10. For example, H2 / H1 can be 1 / 20, 1 / 18, 1 / 15, 1 / 12, 1 / 10, etc. Based on this, the ratio of the length of the second pressure section of the roller to the length of the first pressure section can satisfy: 1 / 20 ≤ L2 / L1 ≤ 1 / 10. In this embodiment, when the lengths of the first pressure section and the second pressure section satisfy the above ratio, the risk of the protective film adhering to the edge of the screen lifting can be reduced when the protective film is pasted on the screen, and the risk of excessive pressure during the pasting process causing light and shadow on the screen can be reduced.

[0024] In one specific embodiment, the roller pressing device further includes a reinforcing section connected to at least one side of the second pressing section along the axial direction of the roller.

[0025] In this embodiment, the roller pressing device may further include a reinforcing section, which is sleeved on the second support shaft of the second pressing section and connected to the end of the second pressing section opposite to the first pressing section. The reinforcing section and the second pressing section can be connected by an adhesive layer. The reinforcing section has high rigidity, can withstand large pressure without deformation, and by providing a reinforcing section on the side of the second pressing section opposite to the first pressing section, it can provide support for the second pressing section. After the venting groove of the second pressing section is filled with gas, the reinforcing section can prevent the second pressing section from deforming along the axial direction of the roller, thereby avoiding the phenomenon that the second pressing section cannot press the protective film due to deformation, and improving the reliability of the roller pressing device.

[0026] In one specific embodiment, the second pressurizing section is connected to both ends of the first pressurizing section along the axial direction of the roller.

[0027] In this embodiment, a second pressure section is connected to both ends of the first pressure section along the axial direction of the roller. The length of the second pressure section is L2, and the length of the first pressure section is L1. When the protective film is adhered to the screen, the first pressure section corresponds to the middle section of the protective film and is used to apply pressure to the middle section. The second pressure section corresponds to the two edge sections of the protective film and is used to apply pressure to the two edge sections.

[0028] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the screen of an electronic device in one specific embodiment;

[0030] Figure 2 A schematic diagram of the structure for installing a protective film on a screen;

[0031] Figure 3 for Figure 2 The front view;

[0032] Figure 4 for Figure 4 A schematic diagram of the structure of the roller clamping device and the axis area of ​​the protective film and screen provided in this application in a specific embodiment;

[0033] Figure 5 for Figure 4 Cross-sectional view of section I;

[0034] Figure 6 for Figure 5 Side view of the first pressurization section;

[0035] Figure 7 for Figure 5 Side view of the second pressurization section;

[0036] Figure 8 for Figure 7 Schematic diagram of the second supporting column in the middle;

[0037] Figure 9 This is a diagram illustrating the assembly process of the first pressurizing section in a specific embodiment of the roller clamping device provided in this application.

[0038] Figure 10 This is a diagram illustrating the assembly process of the first pressurizing section in the roller clamping device provided in this application in another specific embodiment.

[0039] Figure 11 This diagram illustrates the assembly process of the second pressurizing section in the roller clamping device provided in this application in one specific embodiment.

[0040] Figure 12 This is a diagram illustrating the assembly process of the rollers in the roller clamping device provided in this application in one specific embodiment.

[0041] Figure 13 This is a schematic diagram of the structure of the roller clamping device provided in this application in a specific embodiment.

[0042] Figure label:

[0043] 1-Roller clamping device;

[0044] 11-Roller;

[0045] 111 - First pressurization stage;

[0046] 111a - First support column;

[0047] 111b - First clamping part;

[0048] 111c - First contact layer;

[0049] 112 - Second pressurization stage;

[0050] 112a - Second support column;

[0051] 112b - Second clamping part;

[0052] 112d - Second contact layer;

[0053] 112e - First vent slot;

[0054] 112f - Second vent slot;

[0055] 112g - First mounting section;

[0056] 112h - Second Installation Section;

[0057] 113 - Adhesive layer;

[0058] 114 - Enhanced Section;

[0059] 12-Motion components;

[0060] 13-Rotating component;

[0061] 14-Connecting post;

[0062] 15-Contact part;

[0063] 2- Protective film;

[0064] 21-Middle section;

[0065] 22-Edge segment;

[0066] 3-screen;

[0067] 31-Axis region;

[0068] 311-First Main Body;

[0069] 312 - First edge portion;

[0070] 32-Non-axial region;

[0071] 321-Second main body section;

[0072] 322 - Second edge.

[0073] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0075] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0077] Electronic devices include, for example, mobile phones, tablets, personal digital assistants (PDAs), laptops, in-vehicle computers, foldable display devices, foldable displays, wearable devices, and any other device with a foldable screen function. This application does not impose any special limitations on the specific form of the aforementioned electronic devices; for ease of explanation, the following description uses a foldable mobile phone as an example.

[0078] The electronic device includes a hinge, a screen, a first housing, and a second housing. The screen can be a flexible screen used to display images, videos, etc. The specific type of screen in this application is not limited. For example, the screen can be an active-matrix organic light-emitting diode (AMOLED) display. As a self-emissive display, AMOLED does not require a backlight module (BLM). Therefore, when the substrate of the AMOLED display is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display can have bendable characteristics. For example, the screen can also be an organic light-emitting diode (OLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MOLED) display, a quantum dot light-emitting diode (QLED) display, etc.

[0079] A first housing and a second housing are spaced apart and used to house components of electronic devices such as batteries, circuit boards, cameras, headphones, earpieces, buttons, and more. The first and second housings also support the screen, which is fixedly connected (e.g., glued) to them to maintain its flatness during use and protect the non-display surfaces. Furthermore, the screen, after being connected to the first and second housings, also covers the hinge. Specifically, as shown... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the screen of an electronic device in a specific embodiment. The screen 3 of the electronic device includes a connected axial region 31 and non-axial regions 32. Along the width direction X of the screen 3, there are non-axial regions 32 on both sides of the axial region 31, and the two non-axial regions 32 are fixedly connected to the first housing and the second housing of the electronic device. The axial region 31 covers the pivot of the electronic device.

[0080] Along the length Y of screen 3, the axial region 31 includes a first main body portion 311 and a first edge portion 312 connected together, with the first edge portion 312 located at both ends of the first main body portion 311 along the length Y of screen 3. The length of the first main body portion 311 is H2, and the length of the first edge portion 312 is H1. Along the length Y of screen 3, the non-axial region 32 of screen 3 includes a second main body portion 321 and a second edge portion 322 connected together, with the second edge portion 322 located at both ends of the second main body portion 321 along the length Y of screen 3. It should be noted that there is no strict boundary between the first main body portion 311 and the first edge portion 312 of the axial region 31; it only indicates that the first edge portion 312 is located at the edge of the axial region 31. Similarly, there is no strict boundary between the second main body portion 321 and the second edge portion 322 of the non-axial region 32; it only indicates that the second edge portion 322 is located at the edge of the non-axial region 32.

[0081] In one specific embodiment, such as Figure 1 As shown, the second edge portion 322 is aligned with the first edge portion 312, and the second main body portion 321 is aligned with the first main body portion 311, that is, the length of the second main body portion 321 is H1 and the length of the second edge portion 322 is H2.

[0082] Typically, protective films are installed on the screens of electronic devices to protect the screen during assembly and use. For example... Figure 2 As shown, Figure 2 This is a schematic diagram of the protective film 2 installed on the screen. The protective film 2 is typically connected to the screen 3 via a roller clamping device. The roller clamping device includes a moving component 12, a rotating component, and a roller 11. The moving component 12 is connected to the roller 11 via the rotating component 13, allowing the moving component 12 to drive the roller 11 to move along the width direction X of the screen via the rotating component 13. The rotating component 13 can also drive the roller 11 to rotate. When installing the protective film 2, it is first placed between the screen 3 and the roller clamping device. The moving component 12 drives the roller 11 to roll on the protective film 2 along the width direction X of the screen 3, thereby applying a clamping force to the protective film 2, ensuring that the protective film 2 is fully adhered and connected to the screen 3. Please also refer to... Figure 3 , Figure 3 for Figure 2 The front view shows that the roller includes a connecting post 14 and a contact portion 15 sleeved on the connecting post 14. Along the length Y direction of the screen, both ends of the connecting post 14 are rotatably connected to a rotating component. The roller 11 can move along the width X direction of the screen 3 under the drive of the moving component 12 and rotate relative to the protective film 2, i.e., the roller rolls on the protective film 2. Specifically, during the installation of the protective film 2, the contact portion 15 on the roller 11 rolls relative to the protective film 2 and always abuts against the end of the protective film 2 away from the screen 3, thereby applying a pressing force to the protective film 2, ensuring that the protective film 2 and the screen 3 are fully adhered and connected.

[0083] In one specific embodiment, pressure-sensitive adhesive can be provided on the bonding surface of the protective film 2 facing the screen 3. Under the pressing force of the roller pressing device 1, the protective film 2 and the screen 3 are fixedly connected by the pressure-sensitive adhesive. The adhesive should not be too strong to avoid damage to the screen 3 when replacing the protective film 2. The pressure-sensitive adhesive can be an optical adhesive.

[0084] like Figure 3 As shown, because the non-axial area 32 of the screen is connected to the first and second housings of the electronic device, the surface flatness of the screen in the non-axial area 32 is relatively good. When the protective film 2 is bonded to the non-axial area 32, the adhesion between the two is good, and cracking and detachment are less likely to occur. However, because the axial area 31 of the screen covers the hinge of the electronic device, and the hinge is usually an uneven structure, the surface flatness of the screen in the axial area 31 is poor. When the protective film 2 is connected to the axial area 31, the adhesion between the screen and the axial area 31 is poor, making the protective film in the axial area 31 and the screen prone to cracking. Moreover, in actual use of electronic devices, due to frequent screen folding and frequent friction on the screen edges, the protective film 2 connected to the screen edges is prone to lifting under external force, especially the protective film 2 connected to the edge of the axial area 31, meaning the connection reliability between the protective film 2 and the edge of the axial area 31 is lower.

[0085] To solve this technical problem, this application embodiment changes the structure of the roller clamping device, thereby increasing the external force applied by the roller clamping device to the protective film connected to the edge of the screen's axial area.

[0086] In one specific embodiment, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of the roller pressing device 1, the protective film 2, and the shaft area 31 of the screen 3 provided in this application in a specific embodiment. Figure 4 The image shows the state of the roller clamping device when it is pressing the screen's axis region 31 against the protective film 2. The roller clamping device includes a motion component 12 and a roller 11. The motion component 12 can drive the roller 11 to move along the width direction X of the screen 3. A rotating component can also be connected to the motion component 12. The roller 11 is rotatably connected to the rotating component. During the installation of the protective film 2, the roller 11 can move along the width direction X of the screen 3 under the drive of the motion component 12, and the roller 11 can rotate relative to the protective film 2 under the drive of the rotating component.

[0087] The roller 11 includes a first pressurizing section 111 and at least one second pressurizing section 112 connected to the first pressurizing section 111, the second pressurizing section 112 being located on at least one side of the first pressurizing section 111 along the axial direction of the roller. Figure 1 and Figure 4 As shown, the second pressure section 112 is used to apply pressure to the protective film 2 bonded to the first edge portion 312 and the second edge portion 322 of the screen 3, and the first pressure section 111 is used to apply pressure to the protective film 2 bonded to the first main body portion 311 and the second main body portion 321 of the screen 3. In this embodiment, the protective film 2 bonded to the first edge portion 312 and the second edge portion 322 of the screen 3 is defined as the edge segment 22 of the protective film 2, and the protective film 2 bonded to the first main body portion 311 and the second main body portion 321 of the screen 3 is defined as the middle segment 21 of the protective film 2. That is, in this embodiment, the second pressure section 112 of the roller is used to contact the edge segment 22 of the protective film 2, and the first pressure section 111 of the roller is used to contact the middle segment 21 of the protective film 2. The axial direction of the roller can be the same as the length direction Y of the screen 3.

[0088] In one specific embodiment, the first pressurizing section 111 and the second pressurizing section 112 are configured such that the pressure applied by the second pressurizing section 112 to the edge section 22 is greater than the pressure applied by the first pressurizing section 111 to the middle section 21, so that after being pressurized by the roller pressing device 1, the connection reliability between the edge section 22 of the protective film 2 and the first edge portion 312 of the screen 3 is greater than the connection reliability between the middle section 21 of the protective film 2 and the first main body portion 311 of the screen 3, and the connection reliability between the edge section 22 of the protective film 2 and the second edge portion 322 of the screen 3 is greater than the connection reliability between the middle section 21 of the protective film 2 and the second main body portion 321 of the screen 3, that is, the connection reliability between the edge section 22 of the protective film 2 and the edge portion of the screen 3 is greater than the connection reliability between the middle section 21 of the protective film 2 and the main body portion of the screen 3. First, the connection reliability between the edge segment 22 of the protective film 2 and the first edge portion 312 of the screen 3 is relatively high, reducing the risk of lifting due to poor adhesion between the first edge portion 312 and the protective film 2 caused by the low flatness of the axial area 31 of the screen 3. It also reduces the risk of the edge segment 22 of the protective film 2 lifting under external force during the use of the electronic device, improving the protective effect of the protective film 2 on the screen 3. Second, the connection reliability between the middle segment 21 of the protective film 2 and the main body of the screen 3 is not excessive. While ensuring a reliable connection between the middle segment 21 of the protective film 2 and the main body of the screen 3, it reduces the risk of light and shadow phenomena appearing on the main body of the screen 3.

[0089] In one specific embodiment, such as Figure 4As shown, along the axial direction of the roller, both ends of the first pressure section 111 are connected to a second pressure section 112. The length of the second pressure section 112 is L2, and the length of the first pressure section 111 is L1. When the protective film 2 is pasted onto the screen, the first pressure section 111 corresponds to the middle section 21 of the protective film 2, and applies pressure to the middle section 21. The second pressure section 112 corresponds to the two edge sections 22 of the protective film 2, and applies pressure to the two edge sections 22.

[0090] In one specific embodiment, such as Figure 4 As shown, the length of the edge segment 22 of the protective film 2 is the same as the length H2 of the edge portion of the screen, and the length of the middle segment 21 of the protective film 2 is the same as the length H1 of the main body portion of the screen. L1≥H1, L2≥H2, that is, along the length direction Y of the screen 3, the first pressure segment 111 at least covers the middle segment 21 of the protective film 2, and the second pressure segment 112 at least covers the edge segment 22 of the protective film 2.

[0091] The ratio of the length H2 of the first edge portion 312 to the length H1 of the first main body portion 311 can be 1 / 20 ≤ H2 / H1 ≤ 1 / 10, and the ratio of the length H2 of the second edge portion 322 to the length H1 of the second main body portion 321 can be 1 / 20 ≤ H2 / H1 ≤ 1 / 10. For example, H2 / H1 can be 1 / 20, 1 / 18, 1 / 15, 1 / 12, 1 / 10, etc. Based on this, the ratio of the length of the second pressing section 112 of the roller to the length of the first pressing section 111 can satisfy: 1 / 20 ≤ L2 / L1 ≤ 1 / 10.

[0092] In this embodiment, when the length of the first pressure section 111 and the length of the second pressure section 112 meet the above ratio, when the protective film 2 is pasted on the screen 3, the risk of the protective film 2 that is pasted on the edge of the screen 3 can be reduced, and the risk of excessive pressure during the pasting process causing light and shadow on the screen 3 can be reduced.

[0093] In one specific embodiment, such as Figure 4 As shown, an adhesive layer 113 may be provided on the side of the first pressure section 111 facing the second pressure section 112, and / or an adhesive layer 113 may be provided on the side of the second pressure section 112 facing the first pressure section 111, so that the first pressure section 111 and the second pressure section 112 are bonded together by the adhesive layer 113, thereby improving the connection reliability between the first pressure section 111 and the second pressure section 112, avoiding the phenomenon of breakage between the first pressure section 111 and the second pressure section 112 during use, and improving the safety of the roller pressing device 1.

[0094] Specifically, after curing, the circumferential edge of the adhesive layer 113 is flush with the edges of the first pressure section 111 and the second pressure section 112, meaning the outline of the roller 11 is a flat cylindrical surface. The hardness of the cured adhesive layer 113 can be the same as that of the first pressure section 111 and the second pressure section 112. When the protective film 2 is pasted onto the screen 3, the adhesive layer 113 can apply pressure to the protective film 2 in its corresponding area, allowing the protective film 2 and the screen 3 to adhere properly in their respective areas.

[0095] In this embodiment, the adhesive layer 113 can be a strong fixing adhesive.

[0096] In one specific embodiment, such as Figure 5 As shown, Figure 5 for Figure 4 A cross-sectional view of section I. The first pressurizing section 111 includes a first support member and a first contact layer 111c disposed on the first support member, the first contact layer 111c being used to abut against the middle section 21 of the protective film 2. The second pressurizing section 112 includes a second support member and a second contact layer 112d disposed on the second support member, the second contact layer 112d being used to abut against the edge section 22 of the protective film 2. The second support member of the second pressurizing section 112 is provided with a venting groove, one end of which is used to communicate with an external gas source, and the other end extends to the second contact layer 112d, allowing gas from the external gas source to flow through the venting groove into the gap between the second contact layer 112d and the second support member, applying pressure to the second contact layer 112d. When gas injection stops, gas can be discharged from the venting groove.

[0097] During the process of attaching the protective film 2 to the screen 3, the second contact layer 112d of the second pressure section 112 always abuts against the edge section 22 of the protective film 2 and rolls on the edge section 22, so that the edge section 22 of the protective film 2 is bonded to the edge of the screen 3 under the pressing force of the second contact layer 112d. The pressure of the gas entering between the second contact layer 112d and the second support member is transmitted to the edge section 22 of the protective film 2 through the second contact layer 112d, so that the pressing force applied by the second contact layer 112d to the edge section 22 is the sum of the weight of the second pressure section 112 and the pressure of the gas. This results in a larger pressure applied by the second contact layer 112d between the edge section 22 of the protective film 2 and the edge of the screen 3, improving the connection reliability between the edge section 22 of the protective film 2 and the edge of the screen 3, and reducing the risk of the edge section of the protective film 2 lifting off during the use of the electronic device.

[0098] Furthermore, during the process of applying the protective film 2 to the screen 3, the first contact layer 111c of the first pressure section 111 always abuts against the middle section 21 of the protective film 2 and rolls on the middle section 21, so that the middle section 21 of the protective film 2 is bonded to the main body of the screen 3 under the pressing force of the first contact layer 111c. The first support member of the first pressure section 111 is not provided with a ventilation groove, so that the pressing force applied by the first contact layer 111c to the middle section 21 is the weight of the first pressure section 111. This pressing force can reliably bond the middle section 21 of the protective film 2 to the main body of the screen 3, and will not cause excessive pressure between the middle section 21 of the protective film 2 and the main body of the screen 3, resulting in light and shadow.

[0099] In this embodiment, the first contact layer 111c and the second contact layer 112d can be silicone walls, rubber walls, or thermoplastic elastomers (TPE).

[0100] In one specific embodiment, such as Figure 5 As shown, the ventilation slot may include a first ventilation slot 112e and a second ventilation slot 112f. The first ventilation slot 112e is connected to the outside. One end of the second ventilation slot 112f is connected to the first ventilation slot 112e, and the other end extends toward the second contact layer 112d and passes through the second support member.

[0101] exist Figure 5 In the illustrated embodiment, the first venting groove 112e extends along the axial direction of the roller, and the second venting groove 112f extends radially along the roller. The axial direction of the roller can be the same as the width direction X of the screen 3. In this embodiment, the first venting groove 112e and the second venting groove 112f are perpendicular.

[0102] In other embodiments, the first venting groove 112e and the second venting groove 112f may extend in other directions, as long as the first venting groove 112e and the second venting groove 112f are connected to the outside and the second venting groove 112f extends to the second contact layer 112d.

[0103] In one specific embodiment, such as Figure 5As shown, the first support member of the first pressurizing section 111 includes a first support column 111a and a first pressing part 111b. The first pressing part 111b is sleeved on the first support column 111a, and a first contact layer 111c is sleeved on the first pressing part 111b. The second support member includes a second support column 112a and a second pressing part 112b. The second pressing part 112b is sleeved on the second support column 112a, and a second contact layer 112d is sleeved on the second pressing part 112b. The first support column 111a and the second support column 112a are coaxially arranged and have the same diameter. They are connected and connected to the motion assembly 12 through the second support column 112a. The first pressing part 111b and the second pressing part 112b have the same radial dimension along the roller, and the first contact layer 111c and the second contact layer 112d have the same radial dimension along the roller, so that the first pressurizing section 111 and the second pressurizing section 112 have the same radial dimension along the roller.

[0104] exist Figure 5 In the embodiment shown, the first vent groove 112e is disposed on the second support column 112a and extends along the axial direction of the second support column 112a, and the second vent groove 112f extends radially along the second pressing part 112b.

[0105] In one specific embodiment, the first support column 111a and the second support column 112a can be made of metal. Metal materials have good strength and rigidity, which can enhance the supporting effect of the first support column 111a and the second support column 112a on the roller 11 as a whole, prevent the first support column 111a and the second support column 112a from deforming during use, and improve the safety of the roller pressing device 1.

[0106] In one specific embodiment, such as Figure 5 As shown, the roller pressing device may further include a reinforcing section 114, which is sleeved on the second support shaft 112a of the second pressing section and connected to the end of the second pressing section 112 away from the first pressing section 111. The reinforcing section 114 and the second pressing section 112 can be connected by an adhesive layer 113. The reinforcing section 114 has high rigidity and can withstand large pressure without deformation. By providing the reinforcing section 114 on the side of the second pressing section 112 away from the first pressing section 111, the second pressing section 112 can be supported. After the air groove of the second pressing section 112 is filled with gas, the reinforcing section 114 can prevent the second pressing section 112 from deforming along the axial direction of the roller, thereby avoiding the phenomenon that the second pressing section 112 cannot press the protective film 2 due to deformation, and improving the reliability of the roller pressing device 1.

[0107] In one specific embodiment, such as Figure 6 As shown, Figure 6 for Figure 5A side view of the first pressurizing section 111. In this first pressurizing section 111, the first clamping part 111b is an integral structure and is sleeved on the first support column 111a. The first support column 111a can be a solid structure or a hollow structure.

[0108] In one specific embodiment, such as Figure 7 As shown, Figure 7 for Figure 5 Side view of the second pressurization section 112. The second support column 112a is a hollow structure, that is, the inner cavity of the second support column 112a is the aforementioned first ventilation groove 112e. The second pressurizing section 112 includes a plurality of second pressing parts 112b, which are spaced apart circumferentially along the second support column 112a. The second venting grooves 112f are located between adjacent second pressing parts 112b. That is, the second support member is provided with a plurality of second venting grooves 112f, which are evenly distributed circumferentially along the second pressing parts 112b. This allows the gas to be evenly distributed in the gap between the second contact layer 112d and the second pressing part 112b when it enters the second support member through the first venting groove 112e and the second venting groove 112f. This makes the pressure acting on the second contact layer 112d circumferentially more uniform, so that the pressing force of the second pressurizing section 112 acting on the edge section 22 of the protective film 2 is more uniform when the roller rolls along the protective film 2.

[0109] In one specific embodiment, such as Figure 8 As shown, Figure 8 for Figure 7 A schematic diagram of the structure of the second support column 112a is shown. The outer wall of the second support column 112a has a mounting portion, which includes a first mounting portion 112g and a second mounting portion 112h. The first mounting portion 112g and the second mounting portion 112h extend outward from the second support column 112a and are spaced apart circumferentially along the second support column 112a, with the gap between them being the aforementioned second venting groove 112f. The second support column 112a includes multiple mounting portions, which are evenly spaced circumferentially along the second support column 112a, with the gap between the first mounting portion 112g and the second mounting portion 112h being the aforementioned multiple second venting grooves 112f. In this embodiment, the first mounting part 112g and the second mounting part 112h have high strength and rigidity, and are not easily deformed during the operation of the roller pressing device. This makes the gap between the first mounting part 112g and the second mounting part 112h relatively stable, thereby making the structure of the second venting groove 112f formed by the first mounting part 112g and the second mounting part 112h highly stable during the operation of the roller pressing device. This allows gas to enter the space between the second contact layer 112d and the second pressing part 112b through the second venting groove 112f.

[0110] from Figure 7 It is understood that one end of the first mounting part 112g and the second mounting part 112h are connected to the outer wall of the second support column 112a, and the other end extends to abut against the second contact layer 112d, so that the second contact layer 112d, the two adjacent mounting parts, and the second support column 112a form an installation space. The second pressurizing section 112 includes a plurality of second pressing parts 112b, each of which is installed in its respective installation space. The second pressing parts 112b are limited by adjacent mounting parts, which improves the positional accuracy of the second pressing parts 112b and reduces the risk of the position of the second pressing parts 112b shifting during the operation of the roller pressing device.

[0111] exist Figure 8 In the embodiment shown, the first mounting part 112g, the second mounting part 112h, and the second support column 112a are integrally formed, which can improve the sealing performance of the vent groove and reduce the assembly difficulty.

[0112] The first venting groove 112e can also be other structures. In one specific embodiment, the second support column 112a can be a solid structure, and an inclined or bent first venting groove 112e is provided on the second support column 112a so that the first venting groove 112e communicates with the outside and penetrates the outer wall of the second support column 112a. For example, the first venting groove 112e can be an L-shaped structure.

[0113] The second venting groove 112f can also be other structures. In one specific embodiment, the second pressing part 112b is an integral structure and is provided with a second venting groove 112f extending radially along the second pressing part 112b. The two ends of the second venting groove 112f penetrate the inner wall and the outer wall of the second pressing part 112b and communicate with the first venting groove 112e.

[0114] The first pressurization section in each of the above embodiments can be assembled in the manner described below.

[0115] In one specific embodiment, such as Figure 9 As shown, Figure 9 This diagram illustrates the assembly process of the first pressing section 111 in the roller pressing device 1 provided in this application, in one specific embodiment. When assembling the first pressing section 111, the first pressing part 111b is first sleeved onto the first support column 111a, and then the first contact layer 111c is sleeved onto the first pressing part 111b to form the first pressing section. Adhesive layers 113 are provided at both ends of the first pressing section along the axial direction; these adhesive layers 113 are used for bonding with the second pressing section 112. Figure 9 In the embodiment shown, the first contact layer 111c and the first pressing part 111b are separate structures, and the first pressing part 111b can provide support for the first contact layer 111c.

[0116] In another specific embodiment, such as Figure 10 As shown, Figure 10 This diagram illustrates the assembly process of the first pressing section 111 in the roller pressing device 1 provided in this application in another specific embodiment. During assembly of the first pressing section 111, the first pressing part 111b is sleeved onto the first support column 111a to form the first pressing section. Adhesive layers 113 are provided at both ends of the first pressing section along the axial direction; these adhesive layers 113 are used for bonding with the second pressing section. Figure 10 In the embodiment shown, the first contact layer 111c and the first pressing part 111b are an integral structure, that is, the first contact layer 111c is the outer wall of the first pressing part 111b. There is no need to set the first contact layer 111c separately, which can reduce costs and improve assembly efficiency.

[0117] The second pressurization section in each of the above embodiments can be assembled in the manner described below.

[0118] In one specific embodiment, such as Figure 11 As shown, Figure 11 This diagram illustrates the assembly process of the second pressurizing section 112 in the roller pressing device 1 provided in this application, in one specific embodiment. Figure 11 Show Figure 4 The second pressurization section on the left side of the first pressurization section. Figure 4 The second pressurizing section to the right of the first pressurizing section can also be assembled in the manner described below. When assembling the second pressurizing section 112, firstly, the second clamping part 112b is sleeved onto the second support column 112a, and then the second contact layer 112d is sleeved onto the second clamping part 112b to form the second pressurizing section 112. Then, an adhesive layer 113 is provided at least at one end of the second pressurizing section 112 along the axial direction, and at least on the end of the second pressurizing section 112 facing the first vent groove 112e. The reinforcing section 114 is bonded to the second pressurizing section 112 through the adhesive layer 113.

[0119] Among them, such as Figure 11 As shown, along the axial direction of the roller, the second pressing part 112b located on the side of the second vent groove 112f closest to the first vent groove 112e is a separate structure, while the second pressing part 112b located on the side of the second vent groove 112f away from the first vent groove 112e is an integral structure. When the second pressing part 112b is sleeved onto the second support column 112a, each separate second pressing part 112b is installed between adjacent mounting parts, and the integral second pressing part 112b is sleeved onto the second support column 112a. Furthermore, along the axial direction of the roller, each separate second pressing part 112b and the integral second pressing part 112b are separated by mounting parts.

[0120] After the first pressurizing section 111 and the second pressurizing section 112 are assembled, they can be assembled together in the following manner.

[0121] In one specific embodiment, such as Figure 12 As shown, Figure 12 This diagram illustrates the assembly process of the roller 11 in the roller pressing device 1 provided in this application in one specific embodiment. The two assembled second pressing sections 112 are then bonded to both ends of the first pressing section 111 using an adhesive layer 113.

[0122] In one specific embodiment, such as Figure 13 As shown, Figure 13 The present invention provides a schematic diagram of the roller pressing device 1 in another specific embodiment. The roller pressing device 1 may include three second pressing sections 112 and two first pressing sections 111, and the first pressing sections 111 and the second pressing sections 112 are arranged at intervals.

[0123] The number and installation position of the second pressing section 112 and the first pressing section 111 in the roller pressing device 1 of this application embodiment can be adjusted according to the actual use. In this application embodiment, the specific number and installation position of the second pressing section 112 in the roller pressing device 1 are not limited.

[0124] It should be noted that the roller pressing device described in this application embodiment is not limited to applying pressure to the protective film when it is pasted onto the screen, but can also be used in other situations. For example, it can be used to apply pressure to the polarizer when it is pasted onto the display screen, or to apply pressure to the vehicle identification code when it is pasted onto the vehicle frame.

[0125] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A roller pressing device for rolling a workpiece, characterized in that, The roller clamping device includes: Roller; A motion component, connected to the roller, is used to drive the roller to rotate; The roller includes a first pressurizing section and a second pressurizing section connected to the first pressurizing section, wherein the second pressurizing section is located on at least one side of the first pressurizing section along the axial direction of the roller; The first pressurizing section and the second pressurizing section are configured such that the pressure of the second pressurizing section on the workpiece to be rolled is greater than the pressure of the first pressurizing section on the workpiece to be rolled. The second pressurization section includes a second support member and a second contact layer disposed on the second support member. The second contact layer is used to contact the part to be rolled. The second support member is provided with a venting groove. The second support member includes a second support column and a second pressing part sleeved on the second support column. One end of the venting groove is used to communicate with an external gas source, and the other end extends to the second contact layer so that gas can enter between the second contact layer and the second pressing part. The ventilation slot includes a first ventilation slot and a second ventilation slot. The first ventilation slot is disposed on the second support column and is connected to the outside. One end of the second ventilation slot is connected to the first ventilation slot, and the other end passes through the second support member radially. The roller pressing device also includes an adhesive layer, through which the first pressing section and the second pressing section are bonded together.

2. The roller clamping device according to claim 1, characterized in that, The first pressurization section includes a first support member and a first contact layer disposed on the first support member, the first contact layer being used to contact the part to be rolled.

3. The roller clamping device according to claim 2, characterized in that, The ventilation groove is disposed on the second support column, and / or the ventilation groove is disposed on the second pressing part.

4. The roller clamping device according to claim 3, characterized in that, The inner cavity of the second support column is the first ventilation groove, and the outer wall of the second support column is provided with an installation part, the installation part including a first installation part and a second installation part, the first installation part and the second installation part abut against the second contact layer, and along the circumference of the second support column, there is a gap between the first installation part and the second installation part communicating with the inner cavity of the second support column, the gap being the second ventilation groove.

5. The roller clamping device according to claim 4, characterized in that, The outer wall of the second support column is provided with a plurality of mounting portions distributed circumferentially, and the second support member includes a plurality of second clamping portions, each of which is located between adjacent mounting portions.

6. The roller clamping device according to any one of claims 2-5, characterized in that, The first support member includes a first support column and a first clamping part, wherein the first clamping part is an integral structure and is sleeved on the first support column; The surface of the first pressing part that is opposite to the first support column is the first contact layer, or the first contact layer is sleeved on the outside of the first pressing part.

7. The roller clamping device according to claim 2, characterized in that, Along the circumference of the roller, the outer walls of the first contact layer, the second contact layer, and the adhesive layer are flush.

8. The roller clamping device according to any one of claims 1-5, characterized in that, Along the axial direction of the roller, the length of the first pressurizing section is L1, the length of the second pressurizing section is L2, and L2 / L1 satisfies: 1 / 20≤L2 / L1≤1 / 10.

9. The roller clamping device according to any one of claims 1-5, characterized in that, The roller pressing device further includes a reinforcing section connected to at least one side of the second pressing section along the axial direction of the roller.

10. The roller clamping device according to any one of claims 1-5, characterized in that, Along the axial direction of the roller, both ends of the first pressurizing section are connected to the second pressurizing section.

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