Roller pressing device

Abstract

The invention relates to a roller pressing device used for rolling a to-be-rolled piece, the roller pressing device comprises a roller and a movement assembly, the movement assembly is connected with the roller and used for driving the roller to roll, the roller comprises a first pressurizing section and a second pressurizing section connected with the first pressurizing section, and the second pressurizing section is connected with the first pressurizing section. The second pressurizing section is located on at least one side of the first pressurizing section in the axis direction of the roller. The first pressurizing section and the second pressurizing section are configured in the mode that the pressure of the second pressurizing section on the to-be-rolled piece is larger than that of the first pressurizing section on the to-be-rolled piece. The roller pressing device can be used for applying pressure to the protective film when the protective film is pasted on a screen, the pressure of the second pressurizing section to the protective film is large, the connection reliability of the protective film and the edge part of the screen can be improved, the risk that the edge part of the protective film tilts under the action of external force in the use process of electronic equipment can be reduced, and the service life of the electronic equipment is prolonged. The protection effect of the protection film on the screen is improved.

Description

Technical Field

[0001] The present application relates to the technical field of clamping equipment, and in particular to a roller clamping device. Background Art

[0002] A protective film is usually attached to the screen of an electronic device to protect the screen. Usually, the protective film and the screen are pressed together by a roller pressing device to improve the connection reliability between the protective film and the screen. During the use of electronic devices, the edge of the screen is often rubbed, causing the protective film connected to the edge of the screen to easily warp up. Summary of the invention

[0003] In view of this, the present 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 easily warped.

[0004] An embodiment of the present application provides a roller clamping device for rolling a workpiece to be rolled, the roller clamping device comprising: a roller; a moving component, the moving component being connected to the roller and used to drive the roller to roll; wherein the roller comprises a first pressurizing section and a second pressurizing section connected to the first pressurizing section, the second pressurizing section being 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.

[0005] In this embodiment, the part to be rolled can be a protective film, that is, the roller pressing device is used to apply pressure to the protective film when the protective film is pasted on the screen. When the protective film is pasted on the screen, after being pressurized by the roller pressing device, the connection reliability between the edge segment of the protective film and the edge portion 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 portion 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, that is, the connection reliability between the edge segment of the protective film and the edge portion of the screen is greater than the connection reliability between the middle segment of the protective film and the main body of the screen. First, the connection reliability between the edge segment of the protective film and the first edge portion of the screen is greater, which reduces the risk of warping due to poor fitting between the first edge portion and the protective film due to the low flatness of the axis area of ​​the screen, and can reduce the risk of warping of the edge segment of the protective film under the action of external force during the use of the electronic device, thereby improving the protective effect of the protective film on the screen. Secondly, the reliability of the connection between the middle section of the protective film and the main body of the screen is not too great. While the middle section of the protective film is reliably connected to the main body of the screen, the risk of light and shadow phenomena occurring on the main body of the screen is reduced.

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

[0007] In this embodiment, during the process of sticking the protective film on the screen, the second contact layer of the second pressurizing section always contacts 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 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 gravity of the second pressurizing section and the pressure of the gas, so that the pressure applied by the second contact layer between the edge section of the protective film and the edge of the screen is relatively large, thereby 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 warping during the use of the electronic device.

[0008] In a specific embodiment, the second support member includes a second support column and a second pressing portion sleeved on the second support portion, the ventilation groove is arranged on the second support column, and / or the ventilation groove is arranged on the second pressing portion.

[0009] In this embodiment, the first ventilation groove is provided on the second support column and extends along the axial direction of the second support column, and the second ventilation groove extends radially along the second clamping portion. The first ventilation groove can also be other structures. The second support column can be a solid structure, and an inclined or bent first ventilation groove is provided on the second support column so that the first ventilation groove is connected to the outside world, and the first ventilation groove passes through the outer wall of the second support column, and the first ventilation groove can be an L-shaped structure. The second ventilation groove can also be other structures. The second clamping portion is an integrated structure, and is provided with a second ventilation groove extending radially along the second clamping portion, and the two ends of the second ventilation groove pass through the inner wall and the outer wall of the second clamping portion, and are connected to the first ventilation groove.

[0010] In a specific embodiment, the ventilation groove includes a first ventilation groove and a second ventilation groove, the first ventilation groove is arranged on the second support column, the first ventilation groove 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 ventilation groove extends along the axis direction of the roller, and the second ventilation groove extends along the radial direction of the roller. The axis direction of the roller can be the same as the width direction of the screen. In this embodiment, the first ventilation groove is perpendicular to the second ventilation groove.

[0012] In a specific embodiment, the inner cavity of the second support column is the first ventilation groove, the outer wall of the second support column is provided with a mounting portion, the mounting portion includes a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are abutted against the second contact layer, and along the circumference of the second support column, there is a gap between the first mounting portion and the second mounting portion, and the gap is the second ventilation groove.

[0013] In this embodiment, the second support column is a hollow structure, that is, the inner cavity of the second support column is the above-mentioned first ventilation groove. The second pressurizing section includes a plurality of second clamping parts, and the plurality of second clamping parts are arranged at intervals along the circumference of the second support column, and the second ventilation groove is located between adjacent second clamping parts, that is, the second support member is provided with a plurality of second ventilation grooves, and the plurality of second ventilation grooves are evenly distributed along the circumference of the second clamping part, so that when the gas enters the second support member through the first ventilation groove and the second ventilation groove, it can be evenly distributed in the gap between the second contact layer and the second clamping part, so that the pressure acting on the second contact layer at various locations along the circumference is more uniform, so that when the roller rolls along the protective film, the second pressurizing section acts on various locations of the edge section of the protective film with a more uniform pressing force. In this embodiment, the first mounting portion and the second mounting portion have high strength and rigidity and are not easily deformed during the operation of the roller clamping device, so that the gap between the first mounting portion and the second mounting portion is relatively stable, so that the second ventilation groove surrounded by the first mounting portion and the second mounting portion has high structural stability during the operation of the roller clamping device, allowing gas to enter between the second contact layer and the second clamping portion through the second ventilation groove.

[0014] In a specific embodiment, the outer wall of the second support column is provided with a plurality of mounting portions spaced apart along the circumferential direction, and the second support member includes a plurality of second clamping portions, each of which is located between adjacent mounting portions.

[0015] In this embodiment, one end of the first mounting portion and the second mounting portion is 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, two adjacent mounting portions and the second support column enclose an installation space. The second pressurizing section includes a plurality of second clamping portions, each of which is installed in each installation space, so that the second clamping portion is limited by the adjacent mounting portion, thereby improving the position accuracy of the second clamping portion and reducing the risk of the position of the second clamping portion being offset during the operation of the roller clamping device.

[0016] In a specific embodiment, the first support member includes a first support column and a first clamping portion, the first clamping portion is an integrated structure and is sleeved on the first support column; the surface of the first clamping portion facing away from the first support column is the first contact layer, or the first clamping portion is sleeved on the outer side of the first contact layer.

[0017] In this embodiment, the first contact layer and the first pressing part are split structures, and the first pressing part can provide support for the first contact layer. The first contact layer and the first pressing part are integrated structures, and the first contact layer is the outer wall of the first pressing part. There is no need to set up the first contact layer additionally, which can reduce costs and improve assembly efficiency.

[0018] In a specific embodiment, the roller pressing device further includes an adhesive layer, and the first pressurizing section and the second pressurizing section are bonded to each other via the adhesive layer.

[0019] In this embodiment, an adhesive layer can be provided on the side of the first pressurizing section facing the second pressurizing section, and / or an adhesive layer can be provided on the side of the second pressurizing section facing the first pressurizing section, so that the first pressurizing section and the second pressurizing section are bonded to each other through the adhesive layer, thereby improving the connection reliability between the first pressurizing section and the second pressurizing section, avoiding the first pressurizing section and the second pressurizing section from breaking during use, and improving the safety of the roller clamping device.

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

[0021] In this embodiment, after the adhesive layer is cured, its circumferential edge is flush with the edge of the first pressurizing section and the edge of the second pressurizing section, that is, the profile of the roller is a flat cylindrical surface. The hardness of the adhesive layer after curing can be the same as the hardness of the first pressurizing section and the second pressurizing section. When the protective film is attached to the screen, the adhesive layer can apply pressure to the protective film in the corresponding area, so that the protective film and the screen in the corresponding area can be properly attached.

[0022] In a specific embodiment, along the axis 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 may 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 may be 1 / 20≤H2 / H1≤1 / 10. For example, H2 / H1 may be 1 / 20, 1 / 18, 1 / 15, 1 / 12, 1 / 10, etc. Based on this, the ratio of the length of the second pressurizing section of the roller to the length of the first pressurizing section may satisfy: 1 / 20≤L2 / L1≤1 / 10. In this embodiment, when the length of the first pressurizing section and the length of the second pressurizing section satisfy the above ratio, when the protective film is pasted on the screen, the risk of the protective film bonded to the edge of the screen being lifted up can be reduced, and the risk of light and shadow on the screen due to excessive pressure during the pasting of the protective film can be reduced.

[0024] In a specific embodiment, the roller clamping device further includes a reinforcement section, and the reinforcement section is connected to at least one side of the second pressurizing section along the axial direction of the roller.

[0025] In this embodiment, the roller clamping device may also include a reinforcement section, which is sleeved on the second support shaft of the second pressurizing section and connected to the end of the second pressurizing section away from the first pressurizing section. The reinforcement section and the second pressurizing section may be connected by an adhesive layer. The reinforcement section has high rigidity and can withstand large pressure without deformation. By arranging the reinforcement section on the side of the second pressurizing section away from the first pressurizing section, the second pressurizing section can be supported. After the air is filled into the ventilation groove of the second pressurizing section, the reinforcement section can prevent the second pressurizing section from deforming along the axial direction of the roller, so as to avoid the phenomenon that the second pressurizing section cannot press the protective film due to deformation, thereby improving the reliability of the roller clamping device.

[0026] In a specific embodiment, along the axis direction of the roller, both ends of the first pressurizing section are connected to the second pressurizing section.

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

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 2 This is a schematic diagram of the structure in which the protective film is installed on the screen;

[0031] Figure 3 for Figure 2 A front view of

[0032] Figure 4 for Figure 4 A schematic structural diagram of the roller pressing device, the protective film and the axis area of ​​the screen provided in the present application in a specific embodiment;

[0033] Figure 5 for Figure 4 A cross-sectional view of part I;

[0034] Figure 6 for Figure 5 A side view of the first pressurizing section;

[0035] Figure 7 for Figure 5 A side view of the second pressurizing section;

[0036] Figure 8 for Figure 7 A schematic diagram of the structure of the second support column;

[0037] Fig. 9 This is a diagram of the assembly process of the first pressurizing section in the roller pressing device provided in the present application in a specific embodiment;

[0038] Fig.10 This is a diagram of the assembly process of the first pressurizing section in the roller pressing device provided in the present application in another specific embodiment;

[0039] Fig.11 This is a diagram of the assembly process of the second pressurizing section in the roller pressing device provided in the present application in a specific embodiment;

[0040] Fig.12 This is a diagram of the assembly process of the roller in the roller pressing device provided in the present application in a specific embodiment;

[0041] Fig.13 This is a schematic structural diagram of a roller clamping device provided in the present application in a specific embodiment.

[0042] Reference numerals:

[0043] 1-Roller clamping device;

[0044] 11-Roller;

[0045] 111-first pressurizing section;

[0046] 111a-first supporting column;

[0047] 111b-first pressing portion;

[0048] 111c - first contact layer;

[0049] 112- second pressurizing section;

[0050] 112a - second supporting column;

[0051] 112b- second pressing portion;

[0052] 112d- second contact layer;

[0053] 112e-first ventilation groove;

[0054] 112f - second ventilation groove;

[0055] 112g-first mounting portion;

[0056] 112h- second mounting portion;

[0057] 113-adhesive layer;

[0058] 114-Reinforcement section;

[0059] 12-Motion components;

[0060] 13-rotating member;

[0061] 14-connecting column;

[0062] 15-Contact part;

[0063] 2- Protective film;

[0064] 21-middle segment;

[0065] 22-marginal segment;

[0066] 3- Screen;

[0067] 31-axis area;

[0068] 311- first main body;

[0069] 312- first edge portion;

[0070] 32-non-axis area;

[0071] 321- second main body;

[0072] 322 - second edge portion.

[0073] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0075] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0077] The electronic device includes any device with a foldable screen function, such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a laptop computer, a car computer, a foldable display device, a foldable display screen, a wearable device, etc. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned electronic device. For the convenience of description, the following description is based on the example of a foldable mobile phone as the electronic device.

[0078] The electronic device includes a rotating shaft, a screen, a first shell and a second shell, wherein the screen can be a flexible screen, which is used to display images, videos, etc. The specific type of the screen of the present application is not limited. For example, the screen can be an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen. The AMOLED display screen is a self-luminous display screen and does not need to be provided with a backlight module (BLM). Therefore, when the substrate substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have a bendable characteristic. For example, the screen can also be an organic light-emitting diode (OLED) display screen, a mini organic light-emitting diode (mini organic light emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light-emitting diode (quantum dot light-emitting diodes, QLED) display screen, etc.

[0079] The first shell and the second shell are spaced apart, and the first shell and the second shell are used to install the battery, circuit board, camera, earphone, receiver, button, battery and other components of the electronic device. The first shell and the second shell are used to carry the screen, that is, the screen is fixedly connected (for example, glued) to the first shell and the second shell, so that the screen is kept as flat as possible during use, and the non-display surface of the screen is protected. At the same time, after the screen is connected to the first shell and the second shell, it also covers the shaft. Specifically, if Figure 1 As shown, Figure 1 The figure is a schematic diagram of the structure of the screen of the electronic device in a specific embodiment. The screen 3 of the electronic device includes an axis area 31 and a non-axis area 32 connected to each other. Along the width direction X of the screen 3, both sides of the axis area 31 have non-axis areas 32, and the two non-axis areas 32 are fixedly connected to the first shell and the second shell of the electronic device, and the axis area 31 covers the rotating shaft of the electronic device.

[0080] Along the length direction Y of the screen 3, the axis area 31 includes a first main body 311 and a first edge 312 connected to each other, and the first edge 312 is located at both ends of the first main body 311 along the length direction Y of the screen 3. The length of the first main body 311 is H2, and the length of the first edge 312 is H1. Along the length direction Y of the screen 3, the non-axis area 32 of the screen 3 includes a second main body 321 and a second edge 322 connected to each other, and the second edge 322 is located at both ends of the second main body 321 along the length direction Y of the screen 3. It should be noted that there is no strict boundary between the first main body 311 and the first edge 312 of the axis area 31, which only means that the first edge 312 is located at the edge of the axis area 31; there is no strict boundary between the second main body 321 and the second edge 322 of the non-axis area 32, which only means that the second edge 322 is located at the edge of the non-axis area 32.

[0081] In a specific embodiment, 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, a protective film is installed on the screen of an electronic device to protect the screen during assembly and use of the electronic device. Figure 2 As shown, Figure 2 The figure is a schematic diagram of the structure of the protective film 2 installed on the screen. The protective film 2 is usually connected to the screen 3 through a roller clamping device. The roller clamping device includes a moving component 12, a rotating member and a roller 11. The moving component 12 is connected to the roller 11 through a rotating member 13, so that the moving component 12 can drive the roller 11 to move along the width direction X of the screen through the rotating member 13, and the rotating member 13 can also drive the roller 11 to rotate. When installing the protective film 2, first place the protective film 2 between the screen 3 and the roller clamping device, and drive the roller 11 to roll on the protective film 2 along the width direction X of the screen 3 through the moving component 12, so that the protective film 2 is pressed by the roller 11, so that the protective film 2 is fully attached to and connected to the screen 3. Please also refer to Figure 3 , Figure 3 for Figure 2 The front view of the roller includes a connecting column 14 and a contact portion 15 sleeved on the connecting column 14. Along the length direction Y of the screen, both ends of the connecting column 14 are rotatably connected to the rotating member. The roller 11 can move along the width direction X of the screen 3 driven by the moving component 12 and rotate relative to the protective film 2, that is, 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 relatively on 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, so that the protective film 2 and the screen 3 are fully attached and connected.

[0083] In a specific embodiment, a pressure-sensitive adhesive may be provided on the bonding surface of the protective film 2 facing the screen 3, and 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, and the viscosity of the pressure-sensitive adhesive should not be too strong to avoid damage to the screen 3 when replacing the protective film 2. The pressure-sensitive adhesive may be an optical adhesive.

[0084] like Figure 3 As shown, since the non-axis area 32 of the screen is connected to the first shell and the second shell of the electronic device, the surface flatness of the screen in the non-axis area 32 is better. When the protective film 2 is bonded to the non-axis area 32, the two have a better fit and are not prone to cracking and falling off. Since the axis area 31 of the screen covers the rotating shaft of the electronic device, the rotating shaft is usually an uneven structure, which makes the surface flatness of the screen in the axis area 31 poor. When the protective film 2 is connected to the axis area 31, the axis area 31 of the screen and the protective film 2 have a poor fit, resulting in the protective film 2 in the axis area 31 and the screen being easily cracked. Moreover, during the actual use of the electronic device, since the screen is often folded and the edge of the screen is often rubbed, the protective film 2 connected to the edge of the screen is easily warped under the action of external force, especially the protective film 2 connected to the edge of the axis area 31 of the screen is more likely to warp, that is, the connection reliability of the protective film 2 to the edge of the axis area 31 of the screen is lower.

[0085] In order to solve this technical problem, the embodiment of the present application 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 axis area of ​​the screen.

[0086] In a specific embodiment, Figure 4 As shown, Figure 4 This is a schematic structural diagram of the roller pressing device 1, the protective film 2 and the shaft area 31 of the screen 3 provided in the present application in a specific embodiment, that is, Figure 4 The figure shows the state of the roller pressing device when rolling the axis area 31 of the screen and the protective film 2. The roller pressing device includes: a moving component 12 and a roller 11. The moving component 12 can drive the roller 11 to move along the width direction X of the screen 3. The moving component 12 can also be connected to a rotating member. The roller 11 is rotatably connected to the rotating member. During the installation of the protective film 2, the roller 11 can be driven by the moving component 12 to move along the width direction X of the screen 3, and the roller 11 can be driven by the rotating member to rotate relative to the protective film 2.

[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 is located on at least one side of the first pressurizing section 111 along the axis direction of the roller. Figure 1 and Figure 4 As shown, the second pressurizing section 112 is used to pressurize the protective film 2 bonded to the first edge portion 312 and the second edge portion 322 of the screen 3, and the first pressurizing section 111 is used to pressurize the protective film 2 bonded to the first main body portion 311 and the second main body portion 321 of the screen 3. In the embodiment of the present application, 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 pressurizing section 112 of the roller is used to contact the edge segment 22 of the protective film 2, and the first pressurizing section 111 of the roller is used to contact the middle segment 21 of the protective film 2. The axial direction of the roller may be the same direction as the length direction Y of the screen 3.

[0088] In a specific embodiment, the first pressurizing section 111 and the second pressurizing section 112 are configured as follows: 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 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 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 of the screen 3. First, the connection reliability between the edge section 22 of the protective film 2 and the first edge portion 312 of the screen 3 is relatively high, which reduces the risk of warping caused by poor adhesion between the first edge portion 312 and the protective film 2 due to the low flatness of the axis area 31 of the screen 3, and can reduce the risk of warping of the edge section 22 of the protective film 2 under the action of external force during the use of the electronic device, thereby improving the protective effect of the protective film 2 on the screen 3. Secondly, the connection reliability between the middle section 21 of the protective film 2 and the main body of the screen 3 is not too high, which reduces the risk of light and shadow phenomena on the main body of the screen 3 while ensuring that the middle section 21 of the protective film 2 is reliably connected to the main body of the screen 3.

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

[0090] In a specific embodiment, 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 middle segment 21 of the protective film 2 is the same as the length H1 of the main body of the screen, L1≥H1, L2≥H2, that is, along the length direction Y of the screen 3, the first pressurizing segment 111 at least covers the middle segment 21 of the protective film 2, and the second pressurizing 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 may 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 may be 1 / 20≤H2 / H1≤1 / 10. For example, H2 / H1 may be 1 / 20, 1 / 18, 1 / 15, 1 / 12, 1 / 10, etc. Based on this, the ratio of the length of the second pressurizing section 112 of the roller to the length of the first pressurizing section 111 may satisfy: 1 / 20≤L2 / L1≤1 / 10.

[0092] In this embodiment, when the length of the first pressurizing section 111 and the length of the second pressurizing section 112 satisfy the above ratio, when the protective film 2 is pasted on the screen 3, the risk of the protective film 2 adhered to the edge of the screen 3 warping up can be reduced, and the risk of light and shadow on the screen 3 caused by excessive pressure during the pasting of the protective film 2 can be reduced.

[0093] In a specific embodiment, Figure 4 As shown, an adhesive layer 113 can be provided on the side of the first pressurizing section 111 facing the second pressurizing section 112, and / or an adhesive layer 113 can be provided on the side of the second pressurizing section 112 facing the first pressurizing section 111, so that the first pressurizing section 111 and the second pressurizing section 112 are bonded to each other through the adhesive layer 113, thereby improving the connection reliability between the first pressurizing section 111 and the second pressurizing section 112, avoiding the first pressurizing section 111 and the second pressurizing section 112 from breaking during use, and improving the safety of the roller clamping device 1.

[0094] Specifically, after curing, the edges of the adhesive layer 113 along the circumferential direction are flush with the edges of the first pressurizing section 111 and the second pressurizing section 112, that is, the profile of the roller 11 is a flat cylindrical surface. The hardness of the adhesive layer 113 after curing can be the same as the hardness of the first pressurizing section 111 and the second pressurizing section 112. When the protective film 2 is attached to the screen 3, the adhesive layer 113 can apply pressure to the protective film 2 in the corresponding area thereof, so that the protective film 2 and the screen 3 in the corresponding area can be normally attached.

[0095] The adhesive layer 113 in this embodiment may be a strong fixing glue.

[0096] In a specific embodiment, Figure 5 As shown, Figure 5 for Figure 4 The cross-sectional view of part I in the figure. The first pressurizing section 111 includes a first support member and a first contact layer 111c disposed on the first support member, and the first contact layer 111c is 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, and the second contact layer 112d is used to abut against the edge section 22 of the protective film 2. Among them, the second support member of the second pressurizing section 112 is provided with a ventilation 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, so that the gas from the external gas source can flow through the ventilation groove into the gap between the second contact layer 112d and the second support member, and exert pressure on the second contact layer 112d. When the gas filling stops, the gas can be discharged from the ventilation groove.

[0097] During the process of pasting the protective film 2 on the screen 3, the second contact layer 112d of the second pressurizing section 112 always contacts 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 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 gravity of the second pressurizing section 112 and the pressure of the gas, so that the 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 is relatively large, thereby 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 warping during the use of the electronic device.

[0098] In addition, during the process of pasting the protective film 2 on the screen 3, the first contact layer 111c of the first pressurizing section 111 always contacts 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 pressurizing section 111 is not provided with a venting groove, so that the pressing force applied by the first contact layer 111c to the middle section 21 is the gravity of the first pressurizing section 111, and the 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 to cause light and shadow.

[0099] In the embodiment of the present application, the first contact layer 111c and the second contact layer 112d may be a silicone wall or a rubber wall or a thermoplastic elastomer (Thermoplastic rubber, TPE).

[0100] In a specific embodiment, Figure 5 As shown, the ventilation groove may include a first ventilation groove 112e and a second ventilation groove 112f, the first ventilation groove 112e is connected to the outside, one end of the second ventilation groove 112f is connected to the first ventilation groove 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 ventilation groove 112e extends along the axial direction of the roller, and the second ventilation groove 112f extends along the radial direction of the roller. The axial direction of the roller may be the same direction as the width direction X of the screen 3. In this embodiment, the first ventilation groove 112e is perpendicular to the second ventilation groove 112f.

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

[0103] In a specific embodiment, Figure 5As shown, the first support member of the first pressurizing section 111 includes a first support column 111a and a first pressing portion 111b, the first pressing portion 111b is sleeved on the first support column 111a, and the first contact layer 111c is sleeved on the first pressing portion 111b. The second support member includes a second support column 112a and a second pressing portion 112b, the second pressing portion 112b is sleeved on the second support column 112a, and the second contact layer 112d is sleeved on the second pressing portion 112b. The first support column 111a and the second support column 112a are coaxially arranged and have the same diameter, are connected, and are connected to the moving component 12 through the second support column 112a; the first pressing portion 111b and the second pressing portion 112b have the same size along the radial direction of the roller, and the first contact layer 111c and the second contact layer 112d have the same size along the radial direction of the roller, so that the first pressurizing section 111 and the second pressurizing section 112 have the same size along the radial direction of the roller.

[0104] exist Figure 5 In the illustrated embodiment, the first ventilation 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 ventilation groove 112f extends along the radial direction of the second pressing portion 112b.

[0105] In a specific embodiment, the first support column 111a and the second support column 112a can be made of metal material, which has good strength and rigidity, and can enhance the supporting effect of the first support column 111a and the second support column 112a on the roller 11 as a whole, avoid deformation of the first support column 111a and the second support column 112a during use, and improve the safety of the roller clamping device 1.

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

[0107] In a specific embodiment, Figure 6 As shown, Figure 6 for Figure 51 is a side view of the first pressurizing section 111. In the first pressurizing section 111, the first pressing portion 111b is an integrated 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 a specific embodiment, Figure 7 As shown, Figure 7 for Figure 5 The second support column 112a is a hollow structure, that is, the inner cavity of the second support column 112a is the first ventilation groove 112e. The second pressurizing section 112 includes a plurality of second pressing portions 112b, and the plurality of second pressing portions 112b are spaced apart along the circumference of the second support column 112a, and the second ventilation grooves 112f are located between adjacent second pressing portions 112b, that is, the second support member is provided with a plurality of second ventilation grooves 112f, and the plurality of second ventilation grooves 112f are evenly distributed along the circumference of the second pressing portion 112b, so that when the gas enters the second support member through the first ventilation grooves 112e and the second ventilation grooves 112f, it can be evenly distributed in the gap between the second contact layer 112d and the second pressing portion 112b, so that the pressure acting on the second contact layer 112d at various locations along the circumference is more uniform, so that when the roller rolls along the protective film 2, the pressing force of the second pressurizing section 112 on various locations of the edge section 22 of the protective film 2 is more uniform.

[0109] In a specific embodiment, Figure 8 As shown, Figure 8 for Figure 7 Schematic diagram of the structure of the second support column 112a. 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 to the outside of the second support column 112a, and the first mounting portion 112g and the second mounting portion 112h are spaced apart along the circumference of the second support column 112a, and the gap between the first mounting portion 112g and the second mounting portion 112h is the above-mentioned second ventilation groove 112f. The second support column 112a includes a plurality of mounting portions, and the plurality of mounting portions are evenly spaced apart along the circumference of the second support column 112a, and the gap between the first mounting portion 112g and the second mounting portion 112h in each mounting portion is the above-mentioned plurality of second ventilation grooves 112f. In this embodiment, the first mounting portion 112g and the second mounting portion 112h have high strength and rigidity and are not easily deformed during the operation of the roller clamping device, so that the gap between the first mounting portion 112g and the second mounting portion 112h is relatively stable, so that the second ventilation groove 112f surrounded by the first mounting portion 112g and the second mounting portion 112h has high structural stability during the operation of the roller clamping device, allowing gas to enter between the second contact layer 112d and the second clamping portion 112b through the second ventilation groove 112f.

[0110] from Figure 7 It can be seen that one end of the first mounting portion 112g and the second mounting portion 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 portions and the second support column 112a form an installation space. The second pressurizing section 112 includes a plurality of second clamping portions 112b, each of which is installed in each installation space, so that the second clamping portion 112b is limited by the adjacent mounting portion, thereby improving the position accuracy of the second clamping portion 112b and reducing the risk of the position of the second clamping portion 112b being offset during the operation of the roller clamping device.

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

[0112] The first ventilation groove 112e may also be other structures. In a specific embodiment, the second support column 112a may be a solid structure, and an inclined or bent first ventilation groove 112e is provided on the second support column 112a, so that the first ventilation groove 112e is connected to the outside and the first ventilation groove 112e passes through the outer wall of the second support column 112a. For example, the first ventilation groove 112e may be an L-shaped structure.

[0113] The second vent groove 112f may also be other structures. In a specific embodiment, the second pressing portion 112b is an integrated structure, and is provided with a second vent groove 112f extending along the radial direction of the second pressing portion 112b, and the two ends of the second vent groove 112f penetrate the inner wall and the outer wall of the second pressing portion 112b and communicate with the first vent groove 112e.

[0114] The first pressurizing section in the above embodiments can be assembled in the following manner.

[0115] In a specific embodiment, Fig. 9 As shown, Fig. 9 The figure is an assembly process diagram of the first pressurizing section 111 in the roller clamping device 1 provided in the present application in a specific embodiment. When assembling the first pressurizing section 111, firstly, the first clamping portion 111b is sleeved on the first support column 111a, and then the first contact layer 111c is sleeved on the first clamping portion 111b to form the first pressurizing section. Adhesive layers 113 are provided at both ends of the first pressurizing section along the axial direction, and the adhesive layers 113 are used to bond with the second pressurizing section 112. Fig. 9 In the illustrated embodiment, the first contact layer 111c and the first pressing portion 111b are split structures, and the first pressing portion 111b can provide support for the first contact layer 111c.

[0116] In another specific embodiment, Fig.10 As shown, Fig.10 This is a diagram of the assembly process of the first pressurizing section 111 in the roller clamping device 1 provided in the present application in another specific embodiment. When assembling the first pressurizing section 111, the first clamping portion 111b is sleeved on the first support column 111a to form the first pressurizing section. Adhesive layers 113 are provided at both ends of the first pressurizing section along the axial direction, and the adhesive layers 113 are used to bond with the second pressurizing section. Fig.10 In the illustrated embodiment, the first contact layer 111c and the first pressing portion 111b are an integrated structure, that is, the first contact layer 111c is the outer wall of the first pressing portion 111b, and there is no need to additionally provide the first contact layer 111c, which can reduce costs and improve assembly efficiency.

[0117] The second pressurizing section in the above embodiments can be assembled in the following manner.

[0118] In a specific embodiment, Fig.11 As shown, Fig.11 This is a diagram of the assembly process of the second pressurizing section 112 in the roller pressing device 1 provided in the present application in a specific embodiment. Fig.11 Show Figure 4 The second pressurized section on the left side of the first pressurized section, Figure 4 The second pressurizing section on the right side of the first pressurizing section can also be assembled in the following manner. When assembling the second pressurizing section 112, firstly, the second pressing portion 112b is sleeved on the second support column 112a, and then the second contact layer 112d is sleeved on the second pressing portion 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 an adhesive layer 113 is provided at least at one end of the second pressurizing section 112 facing the first ventilation groove 112e, and the reinforcing section 114 is bonded to the second pressurizing section 112 through the adhesive layer 113.

[0119] Among them, Fig.11 As shown, along the axis direction of the roller, the second pressing portion 112b located on the side of the second vent groove 112f close to the first vent groove 112e is a split structure, and the second pressing portion 112b located on the side of the second vent groove 112f away from the first vent groove 112e is an integrated structure. When the second pressing portion 112b is sleeved on the second support column 112a, each separately arranged second pressing portion 112b is installed between adjacent mounting portions, and the integrated second pressing portion 112b is sleeved on the second support column 112a, and along the axis direction of the roller, each separately arranged second pressing portion 112b is separated from the integrated second pressing portion 112b by the mounting portion.

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

[0121] In a specific embodiment, Fig.12 As shown, Fig.12 The figure is a diagram of the assembly process of the roller 11 in the roller pressing device 1 provided in the present application in a specific embodiment. The two assembled second pressurizing sections 112 are adhered to the two ends of the first pressurizing section 111 through the adhesive layer 113 .

[0122] In a specific embodiment, Fig.13 As shown, Fig.13 It is a schematic structural diagram of the roller pressing device 1 provided in the present application 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 pressurizing section 112 and the first pressurizing section 111 of the roller clamping device 1 in the embodiment of the present application can be adjusted according to actual usage conditions. The specific number and installation position of the second pressurizing section 112 in the roller clamping device 1 are not limited in the embodiment of the present application.

[0124] It should be noted that the roller pressing device described in the embodiment of the present application is not limited to applying pressure to the protective film when the protective film is attached to the screen, but can also be used in other occasions. For example, applying pressure to the polarizer when the polarizer is attached to the display screen, or applying pressure to the vehicle identification code when the vehicle identification code is attached to the frame, etc.

[0125] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roller clamping device for rolling a workpiece to be rolled, characterized in that: The roller pressing device comprises: Roller; A motion component, the motion component is connected to the roller and is used to drive the roller to roll; Wherein, the roller comprises a first pressurizing section and a second pressurizing section connected to the first pressurizing section, and the second pressurizing section is located at least on one side of the first pressurizing section along the axis direction of the roller; The first pressurizing section and the second pressurizing section are configured such that the pressure applied by the second pressurizing section to the rolled part is greater than the pressure applied by the first pressurizing section to the rolled part.

2. The roller pressing device according to claim 1, characterized in that: The first pressurizing section comprises a first support member and a first contact layer disposed on the first support member, wherein the first contact layer is 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 is used to contact the workpiece to be rolled, and the second support member is provided with a ventilation groove.

3. The roller pressing device according to claim 2, characterized in that: The second support member includes a second support column and a second pressing portion sleeved on the second support column, the ventilation groove is arranged on the second support column, and / or the ventilation groove is arranged on the second pressing portion.

4. The roller pressing device according to claim 3, characterized in that: The ventilation groove includes a first ventilation groove and a second ventilation groove, the first ventilation groove is arranged on the second support column, the first ventilation groove 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 second support member.

5. The roller pressing device according to claim 4, 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 a mounting portion, and the mounting portion includes a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are abutted against the second contact layer, and along the circumference of the second support column, there is a gap between the first mounting portion and the second mounting portion that is connected to the inner cavity of the second support column, and the gap is the second ventilation groove.

6. The roller pressing device according to claim 5, characterized in that: The outer wall of the second support column is provided with a plurality of mounting portions spaced apart along the circumferential direction, and the second support member includes a plurality of second pressing portions, each of which is located between adjacent mounting portions.

7. The roller pressing device according to any one of claims 2 to 6, characterized in that: The first support member includes a first support column and a first pressing portion, wherein the first pressing portion is an integrated structure and is sleeved on the first support column; The surface of the first pressing portion facing away from the first supporting column is the first contact layer, or the first pressing portion is sleeved with the first contact layer on its outer side.

8. The roller pressing device according to any one of claims 2 to 6, characterized in that: The roller pressing device further includes an adhesive layer, and the first pressurizing section and the second pressurizing section are bonded to each other via the adhesive layer.

9. The roller pressing device according to claim 8, characterized in that: Along the circumference of the roller, an outer wall of the first contact layer, an outer wall of the second contact layer, and an outer wall of the adhesive layer are flush.

10. The roller pressing device according to any one of claims 1 to 6, characterized in that: Along the axis 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.

11. The roller pressing device according to any one of claims 1 to 6, characterized in that: The roller pressing device further includes a reinforcing section connected to at least one side of the second pressurizing section along the axial direction of the roller.

12. The roller pressing device according to any one of claims 1 to 6, characterized in that: Along the axis direction of the roller, both ends of the first pressurizing section are connected to the second pressurizing section.

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