An assembly for a display screen

Abstract

The utility model is suitable for display device processing field provides a kind of for display screen's laminating device, the laminating device for display screen includes: lower cavity, upper cavity, limiting component, pressure-equalizing mechanism and adjusting mechanism;Lower cavity is used to bear the display screen to be laminated;Upper cavity is oppositely arranged with lower cavity and can be moved and laminated to form chamber;Limiting component is set on lower cavity, for positioning and fixed display screen and cover plate;Pressure-equalizing mechanism is set in the inside of upper cavity by adjusting rod, for applying pressure to cover plate;Adjusting mechanism is installed between pressure-equalizing mechanism and upper cavity, for controlling the relative position of both to adjust laminating pressure.The device can effectively realize the accurate positioning and uniform pressure lamination of display screen and cover plate, improve lamination quality and efficiency.The utility model effectively solves the bubble problem caused by alignment deviation and uneven pressure in the prior art, significantly improves the laminating yield and display quality.

Description

Technical Field

[0001] This utility model belongs to the field of display device processing, and in particular relates to a bonding device for a display screen. Background Technology

[0002] With the rapid development of consumer electronics, smartphones, tablets, and wearable devices have become an important part of people's daily lives. As a core component of human-computer interaction, the quality of the display screen directly affects the user's visual experience and product quality.

[0003] Full lamination technology is a key process in the manufacturing of high-end displays. It seamlessly bonds the protective cover to the display screen using optical adhesive, which can effectively reduce the reflection and refraction of the display panel, improve contrast and display effect, and make the device thinner and more robust.

[0004] Currently, existing full lamination devices for displays suffer from air bubbles when the adhesive contacts the cover plate and the display screen due to misalignment and uneven pressure. These air bubbles not only severely affect the display effect but are also the primary cause of low product yield. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a bonding device for a display screen, which aims to solve the problem of air bubbles caused by misalignment and uneven pressure in the prior art.

[0006] This utility model embodiment is implemented as follows: a bonding device for a display screen, characterized in that the bonding device for the display screen includes: a lower cavity, an upper cavity, a limiting component, a pressure equalization mechanism, and an adjustment mechanism. The lower cavity is used to support the display screen to be bonded; The upper cavity and the lower cavity are arranged opposite to each other, and the upper cavity moves relative to the lower cavity to fit together with the lower cavity to form a chamber; The limiting component is disposed on the lower cavity and is used to position and fix the display screen and the cover plate to be bonded. The pressure equalization mechanism is installed inside the upper cavity via an adjusting rod and is used to apply pressure to the cover plate; The adjustment mechanism is installed between the pressure equalization mechanism and the upper cavity to control the relative position between the pressure equalization mechanism and the upper cavity, thereby adjusting the fitting pressure.

[0007] Preferably, both the upper cavity and the lower cavity are made of high-strength alloy; two air valves are provided on the back of the upper cavity, and the air valves and the interior of the upper cavity are provided with flow channels for gas flow, one of the air valves is used to connect to a vacuum pumping device, and the other air valve is used to connect to a vacuum breaking device; The upper and lower cavities are fitted together to form a chamber. The gas in the chamber is extracted by a vacuum pump to create a vacuum. Then, the chamber is injected with gas by a vacuum breaking device to return the chamber to its normal state. Preferably, both the upper cavity and the lower cavity are provided with positioning components to control the fitting accuracy of the upper cavity and the lower cavity; the positioning components include positioning sleeves and positioning pins; Multiple positioning sleeves are provided, and the positioning sleeves are evenly distributed on the inner edge of the lower cavity. Each positioning sleeve has a chamfer on the top to facilitate the insertion of the positioning pin. The number of positioning pins matches the number of positioning sleeves, and they are installed at corresponding positions on the upper cavity and the positioning sleeves; the head of the positioning pin is designed to be conical so that it can be accurately inserted into the positioning sleeve when the upper and lower cavities are fitted together.

[0008] Preferably, the limiting assembly includes a mounting plate, a connecting rod, a limiting plate, a first spring, a roller, and a pressure block; The mounting plate is located in the middle of the lower cavity. The mounting plate is a bent plate with all four sides bent upwards. Each bent side has two through holes through which the connecting rod can pass. The connecting rod is cylindrical, with one end passing through the mounting plate and connecting to the limiting plate. The connecting rod is slidably engaged with the mounting plate. The first spring is sleeved on the connecting rod and located between the mounting plate and the limiting plate, providing elastic force to the limiting plate; The roller is rotatably mounted on the end of the connecting rod away from the limiting plate via a rotating rod. The axis of the roller is perpendicular to the axis of the connecting rod and is used to contact the pressure block to drive the limiting plate to move. Four pressure blocks are provided and are evenly installed around the bottom of the upper cavity, located above the rollers. The pressure blocks are trapezoidal in shape, with their inclined surfaces facing the rollers. Since the rollers are rotatably connected to the connecting rods and the connecting rods are slidably engaged with the mounting plate, the rollers will roll along the inclined surfaces of the pressure blocks under the action of the pressure blocks, thereby driving the connecting rods to slide within the through holes of the mounting plate. Preferably, the pressure equalization mechanism includes a fixed plate, a telescopic rod, an air bladder, and a second spring; The fixing plate is a rectangular mounting plate, the top of which is connected to the upper cavity via a telescopic rod, and the bottom of the fixing plate is used to install the airbag; The airbag is made of a flexible material and is used to contact the display screen. Due to its flexible material and the presence of internal gas, when the cavity is in a vacuum state, the air pressure inside the airbag will be higher than the air pressure inside the cavity. The airbag will expand to contact the display screen and distribute the pressure evenly to various parts of the display screen. The second spring is installed inside the airbag, with one end connected to the fixing plate and the other end connected to the airbag, for providing contraction force to the airbag.

[0009] Preferably, the adjustment mechanism includes a connecting member and a driving member; The connecting component includes a bidirectional lead screw, a threaded sleeve, a fixing block, and a connecting rod. Two bidirectional lead screws are provided, each connected to the upper cavity via a bearing seat. The two ends of the bidirectional lead screw have threads in different directions, and the threaded sleeve is installed at the threaded portion, without contacting the upper cavity. Four fixing blocks are provided, evenly distributed on the pressure equalizing mechanism. The connecting rod is rotatably connected to the threaded sleeve and the fixing blocks, and is arranged parallel to the bidirectional lead screw. The driving component includes a rotating shaft, a synchronous belt assembly, and an operating wheel; the rotating shaft is rotatably disposed inside the upper cavity via a connecting member and is parallel to two bidirectional lead screws; a synchronous belt assembly is sleeved on the rotating shaft and the two bidirectional lead screws for driving the two bidirectional lead screws to rotate; the operating wheel is disposed at both ends of the rotating shaft for driving the rotating shaft to rotate.

[0010] Installed in the upper cavity, the drive component cooperates with the connecting component through a specific transmission structure to adjust the position of the pressure equalization mechanism.

[0011] Preferably, the adjustment mechanism can adjust the screen bonding pressure and bond displays of different thicknesses by adjusting the position of the pressure equalization mechanism; Preferably, the contact surface between the upper cavity and the lower cavity is further provided with a sealing ring, which is used to prevent gas leakage.

[0012] The bonding device for a display screen provided in this embodiment of the invention has the following advantages compared with the prior art: 1. By using a limiting component on the lower cavity to cooperate with a trapezoidal pressure block on the upper cavity, misalignment or slippage during the bonding process is effectively prevented.

[0013] 2. After the chamber is evacuated, the pressure equalization mechanism automatically expands by utilizing the pressure difference between the inside and outside of the chamber, applying pressure evenly to the entire surface of the display screen. This surface contact method completely avoids problems such as air bubbles and localized pressure damage caused by uneven pressure in traditional point or line contact methods.

[0014] 3. The adjustment mechanism allows the device to easily adapt to display screens of different thicknesses without the need to change fixtures or make complex mechanical adjustments, which greatly improves the versatility and production efficiency of the equipment and reduces changeover costs and time. Attached Figure Description

[0015] Figure 1This is a three-dimensional structural view of the front part of this utility model; Figure 2 This is a three-dimensional structural view of the rear of the present invention; Figure 3 This is a three-dimensional structural diagram of the lower cavity of this utility model; Figure 4 This is a three-dimensional structural diagram of the upper cavity of this utility model; Figure 5 This is a three-dimensional structural diagram of the pressure equalization mechanism and the adjustment mechanism of this utility model; Figure 6 This is a three-dimensional structural diagram of the pressure equalization mechanism of this utility model; Figure 7 This is a three-dimensional structural diagram of the adjustment mechanism of this utility model; In the attached diagram: 1. Lower cavity; 2. Upper cavity; 3. Air valve; 4. Positioning assembly; 41. Positioning sleeve; 42. Positioning pin; 5. Limiting assembly; 51. Mounting plate; 52. Connecting rod; 53. Limiting plate; 54. First spring; 55. Roller; 56. Pressure block; 6. Pressure equalizing mechanism; 61. Fixing plate; 62. Telescopic rod; 63. Airbag; 64. Second spring; 7. Adjusting mechanism; 71. Two-way lead screw; 72. Lead sleeve; 73. Fixing block; 74. Connecting rod; 75. Rotating shaft; 76. Synchronous belt assembly; 77. Operating wheel; 8. Sealing ring. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] like Figure 1-7 The diagram shows a structural representation of a bonding device for a display screen according to an embodiment of the present invention. The device includes: a lower cavity 1, an upper cavity 2, a limiting component 5, a pressure equalizing mechanism 6, and an adjusting mechanism 7. The lower cavity 1 supports the display screen to be bonded. The upper cavity 2 is disposed opposite to the lower cavity 1 and moves relative to the lower cavity 1 to bond with the lower cavity 1, forming a chamber. The limiting component 5 is disposed on the lower cavity 1 and is used to position and fix the display screen and the cover plate to be bonded. The pressure equalizing mechanism 6 is disposed inside the upper cavity 2 via an adjusting rod and is used to apply pressure to the cover plate. The adjusting mechanism 7 is installed between the pressure equalizing mechanism 6 and the upper cavity 2 and is used to control the relative position between the pressure equalizing mechanism 6 and the upper cavity 2 to adjust the bonding pressure.

[0019] In this embodiment of the invention, the lower cavity 1 serves as the base of the device, supporting the display screen to be bonded. The upper cavity 2 is located directly above the lower cavity 1, with the two positioned opposite each other. The upper cavity 2 can move linearly relative to the lower cavity 1 under the drive of the driving device, ultimately fitting tightly against the lower cavity 1 to form a closed chamber. A shock-absorbing rubber pad is provided at the bottom of the lower cavity 1, effectively reducing vibrations generated during operation and ensuring bonding stability. The positioning sleeve 41 and positioning pin 42 in the limiting assembly 5 have good wear resistance and corrosion resistance, maintaining accurate positioning for a long time. The limiting plate 53 is connected to the mounting plate 51 via a first spring 54. When positioning and fixing the display screen and cover plate, the first spring 54 provides appropriate elastic pressure, preventing damage to the display screen and cover plate. The surface of the roller 55 is covered with a layer of anti-slip rubber, allowing for better contact with the display screen and cover plate, enhancing the limiting effect.

[0020] The airbag 63 of the pressure equalization mechanism 6 is made of high-quality rubber, possessing excellent elasticity and sealing properties. The airbag 63 applies pressure evenly to the cover plate, ensuring a tighter fit between the display screen and the cover plate. The bidirectional lead screw 71 of the adjustment mechanism 7 is made of high-precision lead screw, offering high transmission efficiency and precise control over the movement of the lead sleeve 72. The synchronous belt assembly 76 uses a toothed belt, ensuring smooth transmission and low noise. The operating wheel 77 has anti-slip textured surfaces, facilitating manual adjustment of the contact pressure by the operator.

[0021] Furthermore, the bonding device is equipped with an intelligent control system, which allows for the setting and adjustment of various parameters. The intelligent control system enables intelligent bonding operations based on different display screens and cover plate materials. Simultaneously, the system also features fault diagnosis and alarm functions; when the device malfunctions, it promptly issues an alarm and displays fault information, facilitating maintenance personnel in troubleshooting.

[0022] like Figure 1-2 As shown, in a preferred embodiment of this utility model, both the upper cavity 2 and the lower cavity 1 are made of high-strength alloy; two air valves 3 are provided on the back of the upper cavity 2, and the air valves 3 and the interior of the upper cavity 2 are provided with flow channels for gas flow. One air valve 3 is used to connect to a vacuum pumping device, and the other air valve 3 is used to connect to a vacuum breaking device; the upper and lower cavities are fitted together to form a chamber. The gas in the chamber is extracted by the vacuum pumping device to create a vacuum state in the chamber, and then the vacuum breaking device injects gas into the chamber to make the chamber return to its normal state; In this embodiment of the invention, the high-strength alloy material of the upper cavity 2 and the lower cavity 1 ensures the structural stability and durability of the chamber, enabling it to withstand pressure changes during vacuuming and vacuum breaking. The ingenious design of the gas valve 3 and the flow channel ensures smooth gas flow, improving the efficiency of vacuuming and vacuum breaking. During vacuuming, the gas valve 3 of the vacuuming device opens, and the gas in the chamber is rapidly extracted along the flow channel, quickly achieving the required vacuum level within a short time. After the bonding operation is completed, the gas valve 3 of the vacuum breaking device opens, and gas is rapidly injected into the chamber, restoring it to its normal state.

[0023] like Figure 1-4 As shown in the preferred embodiment of this utility model, both the upper cavity 2 and the lower cavity 1 are provided with positioning components 4 for controlling the fitting accuracy of the upper cavity 2 and the lower cavity 1. The positioning component 4 includes a positioning sleeve 41 and a positioning pin 42. Multiple positioning sleeves 41 are provided, and the positioning sleeves 41 are evenly distributed on the inner edge of the lower cavity 1. Each positioning sleeve 41 has a chamfer on its top to facilitate the insertion of the positioning pin 42. The number of positioning pins 42 matches the number of positioning sleeves 41 and is installed at the corresponding positions of the upper cavity 2 and the positioning sleeves 41. The head of the positioning pin 42 is designed to be conical so that it can be accurately inserted into the positioning sleeve 41 when the upper and lower cavities 1 are fitted together.

[0024] In this embodiment of the invention, the design of the positioning component 4 greatly improves the fitting accuracy of the upper cavity 2 and the lower cavity 1. The positioning sleeves 41 are evenly distributed on the inner edge of the lower cavity 1. This layout ensures uniform force in all directions during the fitting process and avoids local displacement. The chamfered design at its top is ingenious. When the positioning pin 42 approaches the positioning sleeve 41, the chamfer acts as a guide, allowing the positioning pin 42 to be inserted into the positioning sleeve 41 more smoothly, reducing jamming and resistance during the insertion process.

[0025] Similarly, the tapered design of the head of the positioning pin 42 allows it to quickly locate the entrance of the positioning sleeve 41 as the upper and lower cavities 1 gradually approach and fit together. Even if there is a certain positional deviation, the tapered head can automatically adjust through its guiding action, thus accurately inserting the positioning sleeve 41. This design improves the efficiency and accuracy of the fitting process, enabling the upper and lower cavities 1 to complete the fitting operation quickly and precisely.

[0026] like Figure 3As shown, in a preferred embodiment of this utility model, the limiting component 5 includes a mounting plate 51, a connecting rod 52, a limiting plate 53, a first spring 54, a roller 55, and a pressure block 56; the mounting plate 51 is disposed in the middle of the lower cavity 1, and the mounting plate 51 is a bent plate with all four sides bent upwards, and each bent side has two through holes through which the connecting rod 52 can pass; the connecting rod 52 is cylindrical, and one end of it passes through the mounting plate 51 and connects to the limiting plate 53, and the connecting rod 52 slides with the mounting plate 51; the first spring 54 is sleeved on the connecting rod 52 and is located between the mounting plate 51 and the limiting plate 53, which is the limiting plate 53. Provides elasticity; the roller 55 is rotatably mounted on the end of the connecting rod 52 away from the limiting plate 53 via a rotating rod, and the axis of the roller 55 is perpendicular to the axis of the connecting rod 52, used to contact the pressure block 56 to drive the limiting plate 53 to move; four pressure blocks 56 are provided, evenly installed around the bottom of the upper cavity 2, located above the roller 55; the pressure block 56 is trapezoidal in shape, and its inclined surface faces the roller 55; since the roller 55 is rotatably connected to the connecting rod 52, and the connecting rod 52 is slidably engaged with the mounting plate 51, under the action of the pressure block 56, the roller 55 will roll along the inclined surface of the pressure block 56, thereby driving the connecting rod 52 to slide in the through hole of the mounting plate 51; In this embodiment of the invention, when the upper cavity 2 of the bonding device moves downwards and approaches the lower cavity 1, the pressure block 56 descends along with the upper cavity 2. At this time, the inclined surface of the pressure block 56 begins to contact the roller 55. Since the roller 55 is rotatably connected to the connecting rod 52, and the connecting rod 52 is slidably engaged with the mounting plate 51, the roller 55 rolls along the inclined surface of the pressure block 56. As the upper cavity 2 continues to descend, the roller 55, under the action of the inclined surface of the pressure block 56, drives the connecting rod 52 to slide in the through hole of the mounting plate 51 in a direction away from the center of the upper cavity 2.

[0027] During this process, the first spring 54 is compressed, and its elastic force gradually increases. When the bonding operation is completed and the upper cavity 2 moves upward, the pressure block 56 also rises, and the roller 55 is no longer squeezed by the inclined surface of the pressure block 56. At this time, the first spring 54 recovers its deformation due to the elastic force, pushing the limiting plate 53 to move towards the center of the upper cavity 2. The limiting plate 53 then drives the connecting rod 52 to slide in the reverse direction within the through hole of the mounting plate 51, causing the roller 55 to return to its initial position.

[0028] like Figure 4-6As shown, in a preferred embodiment of this utility model, the pressure equalization mechanism 6 includes a fixed plate 61, a telescopic rod 62, an airbag 63, and a second spring 64. The fixed plate 61 is a rectangular mounting plate 51, the top of which is connected to the upper cavity 2 via the telescopic rod 62. The bottom of the fixed plate 61 is used to mount the airbag 63. The airbag 63 is made of flexible material and is used to contact the display screen. Due to its flexible material and the presence of internal gas, when the cavity is in a vacuum state, the internal air pressure of the airbag 63 will be higher than the air pressure inside the cavity. The airbag 63 will expand to contact the display screen, distributing the pressure evenly to various parts of the display screen. The second spring 64 is installed inside the airbag 63. One end of the second spring 64 is connected to the fixed plate 61, and the other end is connected to the airbag 63, providing a contraction force for the airbag 63.

[0029] In this embodiment of the invention, when the upper cavity 2 descends and comes into contact with the lower cavity 1, the vacuum pump gradually creates a vacuum in the chamber. At this time, the air pressure inside the airbag 63 is higher than the air pressure inside the chamber, and the airbag 63 begins to expand under the action of the pressure difference. Because the airbag 63 is made of flexible material, it can better adapt to the shape of the display screen, and with the cooperation of the second spring 64, it can expand more stably. As the airbag 63 expands, it makes full contact with the surface of the display screen, applying pressure evenly to all parts of the display screen, avoiding damage to the display screen due to excessive local pressure.

[0030] After the bonding process is completed, the chamber returns to its normal air pressure state. At this time, the air pressure inside the airbag 63 gradually balances with the air pressure inside the chamber, and the second spring 64 comes into play, providing a contraction force to the airbag 63, causing the airbag 63 to gradually return to its initial state. This design allows the pressure equalization mechanism 6 to effectively protect the display screen during the bonding operation, and at the same time, it can quickly recover after the operation is completed, preparing for the next bonding operation.

[0031] like Figure 5 and Figure 7As shown in the preferred embodiment of this utility model, the adjusting mechanism 7 includes a connecting member and a driving member; the connecting member includes a bidirectional lead screw 71, a threaded sleeve 72, a fixing block 73, and a connecting rod 74; two bidirectional lead screws 71 are provided, both connected to the upper cavity 2 through a shaft seat, and the two ends of the bidirectional lead screw 71 are provided with threads in different directions, and the threaded sleeve 72 is installed at the thread, the threaded sleeve 72 does not contact the upper cavity 2; four fixing blocks 73 are provided, which are evenly distributed on the pressure equalizing mechanism 6, and the connecting rod 74... The connecting rod 74 is rotatably connected to the threaded sleeve 72 and the fixing block 73, and is arranged parallel to the bidirectional lead screw 71. The driving component includes a rotating shaft 75, a synchronous belt assembly 76, and an operating wheel 77. The rotating shaft 75 is rotatably disposed inside the upper cavity 2 via a connecting member and is parallel to the two bidirectional lead screws 71. The synchronous belt assembly 76 is sleeved on the rotating shaft 75 and the two bidirectional lead screws 71 for driving the two bidirectional lead screws 71 to rotate. The operating wheel 77 is disposed at both ends of the rotating shaft 75 for driving the rotating shaft 75 to rotate. Installed inside the upper cavity 2, the driving component cooperates with the connecting member through a specific transmission structure to adjust the position of the pressure equalization mechanism 6.

[0032] In this embodiment of the invention, the rotation of the operating wheel 77 drives the rotating shaft 75 to rotate. Since the rotating shaft 75 is connected to the two bidirectional lead screws 71 through a synchronous belt assembly 76, the rotation of the rotating shaft 75 synchronously drives the two bidirectional lead screws 71 to rotate. The threads at both ends of the bidirectional lead screws 71 in different directions cause the threaded sleeves 72 mounted on them to move in opposite or opposite directions along the lead screw as it rotates. The linear movement of the threaded sleeves 72 is transmitted to the fixed blocks 73 through the connecting rod 74. The fixed blocks 73 are evenly distributed on the pressure equalizing mechanism 6, thus enabling precise adjustment of the position of the pressure equalizing mechanism 6. Through the cooperation of the bidirectional lead screws 71 and the threaded sleeves 72, rotational motion can be converted into linear motion, achieving stable adjustment of the position of the pressure equalizing mechanism 6 and avoiding shaking and instability during the adjustment process. On the other hand, the use of the synchronous belt assembly 76 ensures the synchronicity of the rotation of the two bidirectional lead screws 71, enabling the pressure equalizing mechanism 6 to maintain balance and stability during the adjustment process, ensuring the accuracy and reliability of the adjustment.

[0033] Furthermore, the adjustment mechanism 7 has a compact design, installed within the limited upper cavity 2, thus not occupying excessive space while effectively adjusting the position of the pressure equalization mechanism 6. Simultaneously, the operating wheels 77 are located at both ends of the rotating shaft 75, facilitating operation from different directions and improving operational convenience and flexibility. This adjustment mechanism 7 allows for flexible adjustment of the position of the pressure equalization mechanism 6 according to actual needs, better adapting to various situations during the display screen bonding process and improving bonding quality and efficiency.

[0034] like Figure 5-7 As shown, in a preferred embodiment of the present invention, the adjustment mechanism 7 can adjust the screen bonding pressure and bond displays of different thicknesses by adjusting the position of the pressure equalization mechanism 6. In this embodiment of the invention, when the screen bonding pressure needs to be adjusted, the operator rotates the operating wheel 77, which drives the rotating shaft 75 to rotate. The rotating shaft 75 drives the bidirectional lead screws 71 on both sides to rotate synchronously via the synchronous belt assembly 76. Since the two ends of the bidirectional lead screws 71 have threads in different directions, the threaded sleeves 72 will make linear movements in opposite directions on the bidirectional lead screws 71. This drives the fixed block 73 to move via the connecting rod 74, thereby changing the position of the pressure equalizing mechanism 6, thus changing the bonding pressure of the pressure equalizing mechanism 6 on the screen to meet different bonding pressure requirements.

[0035] The adjustment mechanism 7 also plays a crucial role in bonding displays of varying thicknesses. When faced with displays of different thicknesses, the adjustment mechanism 7 is driven by the operating wheel 77 to adjust the position of the pressure equalizing mechanism 6. This ensures that the pressure equalizing mechanism 6 can precisely contact the displays of different thicknesses and apply appropriate pressure, guaranteeing a good bonding effect. This adjustment method is characterized by its ease of operation and high adjustment precision, and it can adapt to the bonding of various display sizes, greatly improving the versatility and applicability of the bonding device. Furthermore, the structure of the adjustment mechanism 7 is installed within the upper cavity 2, which does not occupy excessive space while providing stable and reliable position adjustment of the pressure equalizing mechanism 6.

[0036] like Figure 4 As shown, in a preferred embodiment of the present invention, the contact surface between the upper cavity 2 and the lower cavity 1 is further provided with a sealing ring 8, which is used to prevent gas leakage.

[0037] In this embodiment of the invention, to further improve the sealing performance of the chamber, a sealing ring 8 is provided on the mating surfaces of the upper cavity 2 and the lower cavity 1. The sealing ring 8 is made of special materials and processes, possessing good elasticity and corrosion resistance, effectively preventing gas leakage and ensuring stable vacuum and pressure within the chamber. Furthermore, the installation method of the sealing ring 8 is carefully designed for easy replacement and maintenance.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bonding device for a display screen, characterized in that, The bonding device for the display screen includes: a lower cavity, an upper cavity, a limiting component, a pressure equalization mechanism, and an adjustment mechanism; The lower cavity is used to support the display screen to be bonded; The upper cavity and the lower cavity are arranged opposite to each other, and the upper cavity moves relative to the lower cavity to fit together with the lower cavity to form a chamber; The limiting component is disposed on the lower cavity and is used to position and fix the display screen and the cover plate to be bonded. The pressure equalization mechanism is installed inside the upper cavity via an adjusting rod and is used to apply pressure to the cover plate; The adjustment mechanism is installed between the pressure equalization mechanism and the upper cavity to control the relative position between the pressure equalization mechanism and the upper cavity, thereby adjusting the fitting pressure.

2. The bonding device for a display screen according to claim 1, characterized in that, Both the upper cavity and the lower cavity are made of high-strength alloy; two air valves are provided on the back of the upper cavity, and the air valves and the interior of the upper cavity are provided with flow channels for gas flow. One air valve is used to connect to a vacuum pumping device, and the other air valve is used to connect to a vacuum breaking device. The upper and lower cavities are fitted together to form a chamber. The gas in the chamber is extracted by a vacuum pump to create a vacuum. Then, gas is injected into the chamber by a vacuum breaking device to restore the chamber to its normal state.

3. The bonding device for a display screen according to claim 2, characterized in that, Both the upper cavity and the lower cavity are provided with positioning components to control the fitting accuracy of the upper cavity and the lower cavity; the positioning components include positioning sleeves and positioning pins; Multiple positioning sleeves are provided, and the positioning sleeves are evenly distributed on the inner edge of the lower cavity. Each positioning sleeve has a chamfer on the top to facilitate the insertion of the positioning pin. The number of positioning pins matches the number of positioning sleeves, and they are installed at corresponding positions on the upper cavity and the positioning sleeves; the head of the positioning pin is designed to be conical so that it can be accurately inserted into the positioning sleeve when the upper and lower cavities are fitted together.

4. The bonding device for a display screen according to claim 1, characterized in that, The limiting assembly includes a mounting plate, a connecting rod, a limiting plate, a first spring, a roller, and a pressure block; The mounting plate is located in the middle of the lower cavity. The mounting plate is a bent plate with all four sides bent upwards. Each bent side has two through holes through which the connecting rod can pass. The connecting rod is cylindrical, with one end passing through the mounting plate and connecting to the limiting plate. The connecting rod is slidably engaged with the mounting plate. The first spring is sleeved on the connecting rod and located between the mounting plate and the limiting plate, providing elastic force to the limiting plate; The roller is rotatably mounted on the end of the connecting rod away from the limiting plate via a rotating rod. The axis of the roller is perpendicular to the axis of the connecting rod and is used to contact the pressure block to drive the limiting plate to move. Four pressure blocks are provided and are evenly installed around the bottom of the upper cavity, above the rollers. The pressure blocks are trapezoidal in shape, with their inclined surfaces facing the rollers. Since the rollers are rotatably connected to the connecting rods and the connecting rods are slidably engaged with the mounting plate, the rollers will roll along the inclined surfaces of the pressure blocks under the action of the pressure blocks, thereby driving the connecting rods to slide within the through holes of the mounting plate.

5. The bonding device for a display screen according to claim 1, characterized in that, The pressure equalization mechanism includes a fixed plate, a telescopic rod, an airbag, and a second spring; The fixing plate is a rectangular mounting plate, the top of which is connected to the upper cavity via a telescopic rod, and the bottom of the fixing plate is used to install the airbag; The airbag is made of a flexible material and is used to contact the display screen. Due to its flexible material and the presence of internal gas, when the cavity is in a vacuum state, the air pressure inside the airbag will be higher than the air pressure inside the cavity. The airbag will expand to contact the display screen and distribute the pressure evenly to various parts of the display screen. The second spring is installed inside the airbag, with one end connected to the fixing plate and the other end connected to the airbag, for providing contraction force to the airbag.

6. The bonding device for a display screen according to claim 1, characterized in that, The adjustment mechanism includes a connector and a drive component; The connecting component includes a bidirectional lead screw, a threaded sleeve, a fixing block, and a connecting rod. Two bidirectional lead screws are provided, each connected to the upper cavity via a bearing seat. The two ends of the bidirectional lead screw have threads in different directions, and the threaded sleeve is installed at the threaded portion, without contacting the upper cavity. Four fixing blocks are provided, evenly distributed on the pressure equalizing mechanism. The connecting rod is rotatably connected to the threaded sleeve and the fixing blocks, and is arranged parallel to the bidirectional lead screw. The driving component includes a rotating shaft, a synchronous belt assembly, and an operating wheel; the rotating shaft is rotatably disposed inside the upper cavity via a connecting member and is parallel to two bidirectional lead screws; a synchronous belt assembly is sleeved on the rotating shaft and the two bidirectional lead screws for driving the two bidirectional lead screws to rotate; the operating wheel is disposed at both ends of the rotating shaft for driving the rotating shaft to rotate.

7. The bonding device for a display screen according to claim 1, characterized in that, The adjustment mechanism can adjust the screen bonding pressure and bond displays of different thicknesses by adjusting the position of the pressure equalization mechanism.

8. The bonding device for a display screen according to claim 1, characterized in that, The contact surface between the upper cavity and the lower cavity is also provided with a sealing ring, which is used to prevent gas leakage.

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