Auxiliary tool for assembling outer frame of liquid crystal display screen

Abstract

The invention relates to the technical field of liquid crystal display screen machining, in particular to a liquid crystal display screen outer frame assembling auxiliary tool which comprises a concentric-square-shaped mounting frame, a transverse top plate is fixedly mounted in the concentric-square-shaped mounting frame, and a rotatable protective pad is mounted on the top plate. The device comprises a rectangular-ambulatory-plane mounting frame, a cleaning mechanism used for cleaning impurities on the surface of the protective pad is mounted at the bottom of the rectangular-ambulatory-plane mounting frame, a rotatable rectangular-ambulatory-plane frame is mounted at the upper end of the rectangular-ambulatory-plane mounting frame, a handle is fixedly mounted on the rectangular-ambulatory-plane frame, and four rolling extrusion mechanisms are mounted on the rectangular-ambulatory-plane frame. The driving mechanism can automatically drive the four rolling extrusion mechanisms to move, the extrusion rollers can synchronously move anticlockwise along the four edges of the outer frame to conduct extrusion operation, the automatic assembly process reduces the time of manual adjustment and operation, and compared with a traditional manual assembly mode, the assembly efficiency is greatly improved, and the production cost is reduced. The production cycle is shortened, and meanwhile the assembling precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display processing, and particularly to an auxiliary tooling for assembling the outer frame of a liquid crystal display. Background Art

[0002] In the production process of liquid crystal displays, the assembly of the outer frame is a key link, and its quality directly affects the aesthetics, structural stability and service life of the product. The assembly methods of the outer frame of liquid crystal displays mainly include snap assembly, screw fixation, glue pasting, and hot press assembly. When using the snap assembly method to assemble the outer frame, generally, the outer frame is manually squeezed and snapped onto the liquid crystal display.

[0003] The traditional snap assembly method mainly relies on manual operation. When manually placing the outer frame, problems such as misalignment and uneven gaps are likely to occur, affecting the appearance and sealing performance of the product; manually adjusting and squeezing the outer frame takes a long time, making it difficult to meet the requirements of large-scale production and resulting in low efficiency.

[0004] Therefore, there is an urgent need for an auxiliary tooling for assembling the outer frame of a liquid crystal display to solve these problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an auxiliary tooling for assembling the outer frame of a liquid crystal display to solve the problems of low precision and low efficiency in the existing manual assembly of the outer frame of a liquid crystal display as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An auxiliary tooling for assembling the outer frame of a liquid crystal display, including a rectangular installation frame. A horizontal top plate is fixedly installed in the rectangular installation frame. A rotatable protective pad is installed on the top plate. And a cleaning mechanism for cleaning impurities on the surface of the protective pad is installed at the bottom of the rectangular installation frame. A rotatable rectangular frame is installed at the upper end of the rectangular installation frame. And a handle is fixedly installed on the rectangular frame. Four rolling extrusion mechanisms are installed on the rectangular frame. A driving mechanism for driving the four rolling extrusion mechanisms to move along the rectangular frame is also installed on the rectangular frame. The four rolling extrusion mechanisms are respectively located at the four inner corners of the rectangular frame. The rolling extrusion mechanism includes a cylinder. The cylinder is fixedly installed on the driving mechanism. And the output end of the cylinder is elastically connected with an installation cylinder. An extrusion roller is fixedly installed at the bottom of the installation cylinder.

[0007] Preferably, the driving mechanism includes four threaded columns. Two strip-shaped chutes are vertically distributed on the loop-shaped frame. Two groups of vertically distributed mounting columns are detachably connected to the loop-shaped frame. Two of the threaded columns are respectively rotatably connected in the two strip-shaped chutes. A slide bar is fixedly connected between each group of two mounting columns, and a threaded column is rotatably connected. An installation block that is respectively threadedly connected to the corresponding threaded column and slidably connected to the corresponding slide bar is also installed between each group of two mounting columns. An installation block that is threadedly connected to the corresponding threaded column is also slidably connected in each strip-shaped chute. Stepping motors a for driving the corresponding threaded columns to rotate are fixedly installed on the outer wall of the loop-shaped frame and the corresponding mounting columns. The four installation blocks are respectively used for installing and fixing the cylinders in the four rolling extrusion mechanisms.

[0008] Preferably, a U-shaped connection block that is buckled on the loop-shaped frame is fixedly connected to the bottom end of each mounting column, and the U-shaped connection block is fixed to the loop-shaped frame by a locking bolt.

[0009] Preferably, the protective pad includes a loop-shaped protective pad. The loop-shaped protective pad is sleeved on the top plate. A rotating shaft is rotatably connected to both sides of the top plate, and the loop-shaped protective pad is driven to rotate by the rotating shaft. A stepping motor b for driving one of the rotating shafts to rotate is fixedly installed on the loop-shaped mounting frame.

[0010] Preferably, top blocks fixed to the inner side of the loop-shaped mounting frame are installed on both sides of the top plate, and the two top blocks are in clearance fit with the loop-shaped protective pad.

[0011] Preferably, the upper surface of the loop-shaped protective pad is on the same horizontal plane as the upper surfaces of the two top blocks.

[0012] Preferably, the cleaning mechanism includes cleaning bristles. A bottom plate with cleaning bristles installed on its upper surface is fixedly installed at the bottom of the loop-shaped mounting frame, and the upper ends of the cleaning bristles are abutted against the loop-shaped protective pad.

[0013] Preferably, the cleaning bristles are adhered to the upper surface of the bottom plate by Velcro.

[0014] Preferably, a top column fixedly connected to the output end of the cylinder is slidably connected in the installation cylinder. A spring is fixedly connected to the lower end of the top column, and the other end of the spring is fixedly connected to the inner bottom wall of the installation cylinder. A damping sleeve is also fixedly sleeved on the lower end of the top column.

[0015] Preferably, the rollers on the extrusion rollers are made of silicone rubber.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. When the liquid crystal display screen in the present invention is placed, it is aligned with a corner of the U-shaped mounting frame, and when the outer frame is placed, it is also aligned with the display screen. This precise positioning method, combined with the prior clamping of the four corners by the extrusion rollers and the extrusion along the edges, can make the outer frame closely fit with the liquid crystal display screen, ensuring that the outer frame is accurately clamped on the display screen, effectively avoiding problems such as assembly misalignment and uneven gaps, and greatly improving the assembly quality. The driving mechanism can automatically drive the four rolling extrusion mechanisms to move, and the extrusion rollers can move synchronously counterclockwise along the four sides of the outer frame for extrusion operations. This automated assembly process reduces the time for manual adjustment and operation. Compared with the traditional manual assembly method, it greatly improves the assembly efficiency and shortens the production cycle.

[0017] 2. By precisely controlling the four stepper motors a in the present invention, the synchronous movement or movement in a specific order of the four rolling extrusion mechanisms can be achieved. This synchronous and coordinated movement can ensure that the outer frame is evenly extruded at each position, enabling the outer frame to be better clamped with the display screen and improving the assembly quality.

[0018] 3. Through the rotatable protective pad and the cleaning mechanism for cleaning the surface of the protective pad, during the rotation of the U-shaped protective pad, the cleaning bristles on the bottom plate move relative to the U-shaped protective pad, capable of comprehensively and meticulously cleaning the surface of the U-shaped protective pad, effectively removing impurities such as dust and debris adhering to it. The cleaning effect is better than simply relying on gravity to drop impurities, ensuring that the surface of the protective pad maintains a high cleanliness, without the need for manual cleaning, and can continuously and automatically keep the contact surface between the protective pad and the liquid crystal display screen clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a preferred embodiment of the auxiliary tool for assembling the outer frame of the liquid crystal display screen provided by the present invention; Figure 2 is a schematic structural diagram of the U-shaped frame flipped 90 degrees in the present invention; Figure 3 is a schematic structural diagram of the U-shaped mounting frame in the present invention; Figure 4 is a schematic structural diagram of the bottom of the U-shaped mounting frame in the present invention; Figure 5 is a schematic structural diagram of the protective pad in the present invention; Figure 6 is a schematic structural diagram of the cleaning mechanism in the present invention; Figure 7 is a schematic structural diagram of the U-shaped frame in the present invention; Figure 8 is a schematic structural diagram of the rolling extrusion mechanism in the present invention; Figure 9 is an exploded structural diagram of the rolling extrusion mechanism in the present invention.

[0020] In the figure: 1, a loop-shaped mounting bracket; 11, a top plate; 12, a top block; 2, a loop-shaped bracket; 21, a handle; 3, a driving mechanism; 31, a strip-shaped sliding groove; 32, a mounting post; 321, a U-shaped connecting block; 322, a locking bolt; 33, a threaded post; 34, a mounting block; 35, a sliding rod; 36, a stepper motor a; 4, a protective pad; 41, a rotating shaft; 42, a loop-shaped protective pad; 43, a stepper motor b; 5, a cleaning mechanism; 51, a bottom plate; 52, cleaning bristles; 6, a rolling extrusion mechanism; 61, a cylinder; 62, a mounting cylinder; 621, a top post; 622, a spring; 623, a damping sleeve; 63, an extrusion roller. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] In this solution, please refer to Figure 1 - Figure 9 , a kind of auxiliary tooling for assembling the outer frame of a liquid crystal display screen shown in the figure, including a loop-shaped mounting bracket 1. A horizontal top plate 11 is fixedly installed in the loop-shaped mounting bracket 1. A rotatable protective pad 4 is installed on the top plate 11. And a cleaning mechanism 5 for cleaning the impurities on the surface of the protective pad 4 is installed at the bottom of the loop-shaped mounting bracket 1. A rotatable loop-shaped bracket 2 is installed at the upper end of the loop-shaped mounting bracket 1. And a handle 21 is fixedly installed on the loop-shaped bracket 2. Four rolling extrusion mechanisms 6 are installed on the loop-shaped bracket 2. A driving mechanism 3 for driving the four rolling extrusion mechanisms 6 to move along the loop-shaped bracket 2 is also installed on the loop-shaped bracket 2. The four rolling extrusion mechanisms 6 are respectively located at the four inner corners of the loop-shaped bracket 2. The rolling extrusion mechanism 6 includes a cylinder 61. The cylinder 61 is fixedly installed on the driving mechanism 3. And the output end of the cylinder 61 is elastically connected with a mounting cylinder 62. A bottom of the mounting cylinder 62 is fixedly installed with an extrusion roller 63; It should be noted that: the cylinder 61 in the present invention controls the expansion and contraction of the extrusion roller 63 at the bottom of the mounting cylinder 62. During the use of the auxiliary tooling, first, the loop-shaped bracket 2 is rotated and lifted through the handle 21. The liquid crystal display screen is placed on the protective pad 4 inside the loop-shaped mounting bracket 1. And a corner of the liquid crystal display screen is aligned with a corner of the loop-shaped mounting bracket 1 (corresponding to the attached Figure 2In the lower right corner of the figure), place the outer frame on the liquid crystal display screen and align it with the liquid crystal display screen. Put down the return frame 2 and press against the return frame 2 through the handle 21 to prevent it from having relative displacement with the return mounting frame 1. The driving mechanism 3 drives the extrusion rollers 63 on the four rolling extrusion mechanisms 6 to move to the four corners of the outer frame of the liquid crystal display screen respectively. The air cylinder 61 controls the extrusion roller 63 below the mounting cylinder 62 to extrude the outer frame, so that the four corners of the outer frame of the liquid crystal display screen are clamped with the four corners of the liquid crystal display screen. Then, the driving mechanism 3 drives the four rolling extrusion mechanisms 6 to move along the four sides of the outer frame of the liquid crystal display screen respectively. The four extrusion rollers 63 move counterclockwise synchronously along the outer frame of the liquid crystal display screen to extrude the outer frame of the liquid crystal display screen, so that the other parts of the outer frame are also clamped on the liquid crystal display screen. When the liquid crystal display screen of the present invention is placed, it is aligned with a corner of the return mounting frame, and when the outer frame is placed, it is also aligned with the display screen. This precise positioning method, combined with the prior clamping of the four corners by the extrusion rollers 63 and the extrusion along the sides, can make the outer frame fit tightly with the liquid crystal display screen, ensure that the outer frame is accurately clamped on the display screen, effectively avoid problems such as assembly misalignment and uneven gaps, and greatly improve the assembly quality. The driving mechanism 3 can automatically drive the four rolling extrusion mechanisms 6 to move, and the extrusion rollers 63 can move counterclockwise synchronously along the four sides of the outer frame for extrusion operation. This automated assembly process reduces the time for manual adjustment and operation, and compared with the traditional manual assembly method, greatly improves the assembly efficiency and shortens the production cycle. Among them, to further improve the intelligence of the device, the four air cylinders 61 adjust the lifting height of the extrusion rollers 63 according to whether the liquid crystal display screen is in a curved state, that is, the four air cylinders 61 are controlled by a plc, and the stroke and lifting height of the extrusion rollers 63 are controlled according to whether the liquid crystal display screen is in a curved state and its size. The PLC can quickly and accurately control the action of the air cylinder 61 according to the preset program and the information fed back by the sensor. Compared with manual operation or the traditional fixed setting method, it can complete the adjustment of the height and stroke of the extrusion rollers 63 more precisely and efficiently. This reduces the time for manual intervention and adjustment, improves the speed and stability of the assembly process, and thus improves the overall production efficiency. Among them, before placing the liquid crystal display screen on the protective pad 4, rotate the protective pad 4 so that the impurities remaining on the protective pad 4 fall to the ground as the protective pad 4 rotates. At the same time, the cleaning mechanism 5 at the bottom cleans the impurities adhered to the surface of the protective pad 4 to ensure that the surface of the protective pad 4 in contact with the liquid crystal display screen remains clean, preventing possible damage to the liquid crystal display screen caused by impurities on the surface of the protective pad 4. Among them, the mounting cylinder 62 is elastically connected to the output end of the air cylinder 61, which can avoid the risk of hard contact and damage during the clamping process of the outer frame and the liquid crystal display screen.

[0023] Further, refer to Figure 7 - Figure 8, the driving mechanism 3 includes four threaded columns 33. Two strip-shaped sliding grooves 31 distributed vertically are formed on the loop-shaped frame 2. Two groups of mounting columns 32 distributed vertically are detachably connected to the loop-shaped frame 2. Among them, two threaded columns 33 are respectively rotatably connected in the two strip-shaped sliding grooves 31. A slide bar 35 is fixedly connected between each group of two mounting columns 32, and a threaded column 33 is rotatably connected. An installation block 34 that is respectively threadedly connected to the corresponding threaded column 33 and slidably connected to the corresponding slide bar 35 is also installed between each group of two mounting columns 32. An installation block 34 that is threadedly connected to the corresponding threaded column 33 is also slidably connected in each strip-shaped sliding groove 31. A stepping motor a 36 for driving the corresponding threaded column 33 to rotate is fixedly installed on the outer wall of the loop-shaped frame 2 and the corresponding mounting column 32. The four installation blocks 34 are respectively used for the installation and fixation of the cylinders 61 in the four rolling extrusion mechanisms 6; It should be noted that: the four threaded columns 33 in the driving mechanism 3 are driven to rotate by four stepping motors a 36. Two of the threaded columns 33 are used for the movement of the installation blocks 34 in the strip-shaped sliding grooves 31, driving two of the rolling extrusion mechanisms 6 to move along the edge of the loop-shaped frame 2 (refer to the attached Figure 7 )). The other two installation blocks 34 are installed between each group of two mounting columns 32, and the two installation blocks 34 move along the slide bar 35 to adjust the movement paths of the two rolling extrusion mechanisms 6 installed on them. The two groups of mounting columns 32 are detachably connected to the loop-shaped frame 2, that is, the positions of the two groups of mounting columns 32 can be adjusted according to the size of the liquid crystal display screen, so that the two rolling extrusion mechanisms 6 located on them can be adapted to liquid crystal display screens of different sizes; the two groups of mounting columns 32 and the loop-shaped frame 2 in the present invention are detachably connected, which enables the positions of the two groups of mounting columns 32 to be flexibly adjusted according to the size of the liquid crystal display screen; when facing liquid crystal display screens of different sizes, the positions of the mounting columns 32 can be adjusted to make the movement paths of the rolling extrusion mechanisms 6 installed on them adapt to the display screen border, ensuring that the device can handle liquid crystal display screens of various sizes, greatly enhancing the versatility of the tooling and reducing the cost of the enterprise purchasing multiple sets of tooling due to the variety of product sizes; through the precise control of the four stepping motors a 36, the synchronous movement or sequential movement of the four rolling extrusion mechanisms 6 can be realized. This synchronous and coordinated movement can ensure that the outer frame is uniformly extruded at each position, making the outer frame better clamped with the display screen and improving the assembly quality; Among them, refer to Figure 8, at the bottom of each mounting post 32, a U-shaped connecting block 321 buckled on the loop-shaped frame 2 is fixedly connected, and the U-shaped connecting block 321 is fixed on the loop-shaped frame 2 through a locking bolt 322; the combination of the U-shaped connecting block 321 and the locking bolt 322 makes the disassembly and installation process of the mounting post 32 relatively simple and fast. When it is necessary to adjust the positions of the two groups of mounting posts 32 according to the size of the liquid crystal display screen, just loosen the locking bolt 322, and then the U-shaped connecting block 321 and its connected mounting post 32 can be easily moved. After adjusting to the appropriate position, tighten the bolt to fix it. This greatly saves the time for adjusting the tooling, improves the efficiency in the production preparation stage, and facilitates the rapid switching of the production of products with different sizes on the production line.

[0024] Among them, refer to Figure 3 - Figure 5 , the protective pad 4 includes a loop-shaped protective pad 42. The loop-shaped protective pad 42 is sleeved on the top plate 11. On both sides of the top plate 11, a rotating shaft 41 is rotatably connected, and the loop-shaped protective pad 42 is driven to rotate through the rotating shaft 41. A stepping motor b43 for driving one of the rotating shafts 41 to rotate is fixedly installed on the loop-shaped mounting frame 1; the stepping motor b43 controls the rotation of the rotating shaft 41, thereby controlling the rotation of the loop-shaped protective pad 42. During the rotation of the loop-shaped protective pad 42, when the upward part of the loop-shaped protective pad 42 rotates to the downward position, the dust and impurities on it will fall due to the action of gravity; there is no need for manual cleaning, and it can continuously and automatically keep the contact surface between the protective pad 4 and the liquid crystal display screen clean; the clean surface of the protective pad 4 can reduce the risk of scratching the surface of the liquid crystal display screen. If there are hard impurities remaining on the surface of the protective pad 4, it is very easy to scratch the surface of the display screen during the placement or movement of the display screen, affecting the appearance and performance of the product. And the continuously clean protective pad 4 provides a safe placement environment for the display screen and protects the integrity of the display screen.

[0025] Among them, refer to Figure 2 and Figure 3 , on both sides of the top plate 11, top blocks 12 fixed to the inner side of the loop-shaped mounting frame 1 are installed, and both of the two top blocks 12 are in clearance fit with the loop-shaped protective pad 42; the top plate 11 supports the placed display screen, and the setting of the top blocks 12 further strengthens the support structure of the display screen. The top blocks 12 and the top plate 11 work together to more evenly disperse the weight of the display screen, prevent the display screen from deforming or being damaged due to uneven force during placement and assembly, and ensure the stability and safety of the display screen during the assembly process. Since there is a gap between the top blocks 12 and the loop-shaped protective pad 42, it will not hinder the normal rotation of the loop-shaped protective pad 42. When it is necessary to rotate the loop-shaped protective pad 42 to remove surface impurities, the top blocks 12 will not interfere with its rotation, ensuring the smooth realization of the cleaning function of the protective pad and improving the convenience and reliability of the use of the tooling.

[0026] Among them, the upper surface of the loop-shaped gasket 42 is on the same horizontal plane as the upper surfaces of the two top blocks 12; when the liquid crystal display screen is placed on the loop-shaped gasket 42 and the top blocks 12, since they are on the same horizontal plane, the display screen can be placed stably without tilting or shaking. This helps to improve the stability of the display screen during the assembly process, ensuring that the outer frame and the display screen can be accurately aligned and snapped together, thereby improving the assembly accuracy and product quality.

[0027] Further, referring to Figure 4 and Figure 6 , the cleaning mechanism 5 includes cleaning bristles 52. A bottom plate 51 with cleaning bristles 52 mounted on its upper surface is fixedly installed at the bottom of the loop-shaped mounting frame 1, and the upper ends of the cleaning bristles 52 are abutted against the loop-shaped gasket 42; It should be noted that: during the rotation of the loop-shaped gasket 42, the cleaning bristles 52 on the bottom plate 51 move relative to the loop-shaped gasket 42, which can comprehensively and carefully clean the surface of the loop-shaped gasket 42, effectively removing impurities such as dust and debris adhered to it. The cleaning effect is better than simply relying on gravity to drop impurities, and it can ensure that the surface of the gasket remains highly clean; Among them, the cleaning bristles 52 are adhered to the upper surface of the bottom plate 51 by Velcro. After long-term use, the cleaning bristles 52 may be worn, deformed, or have a reduced cleaning effect. By adhering with Velcro, the operator can easily peel off the old cleaning bristles 52 from the bottom plate 51 and then replace them with new bristles without the need to use complex tools or perform cumbersome disassembly processes, greatly saving the replacement time and labor costs.

[0028] Further, referring to Figure 9, a ejector rod 621 fixedly connected to the output end of the cylinder 61 is slidably connected in the mounting cylinder 62, and a spring 622 is fixedly connected to the lower end of the ejector rod 621. The other end of the spring 622 is fixedly connected to the inner bottom wall of the mounting cylinder 62. A damping sleeve 623 is also fixedly sleeved on the lower end of the ejector rod 621. During the operation of the rolling extrusion mechanism 6, the cylinder 61 controls the extrusion roller 63 at the bottom of the mounting cylinder 62 to approach the outer frame and extrude the outer frame. During this process, the ejector rod 621 will extrude the spring 622 inside the mounting cylinder 62. During the extrusion and rolling process of the extrusion roller 63 on the outer frame, the spring 622 is always in a compressed state. The existence of the spring 622 prevents the extrusion roller 63 from making hard contact with the outer frame and protects the outer frame. When the outer frame is snapped onto the liquid crystal display screen, there is a certain gap between the extrusion roller 63 and the outer frame. The damping sleeve 623 has a buffering effect on the elastic force of the spring 622. After the outer frame is snapped onto the liquid crystal display screen, it can effectively prevent the extrusion roller 63 from colliding directly with the already installed outer frame due to the elastic force of the spring 622. The existence of the spring 622 prevents the extrusion roller 63 from making hard contact with the outer frame. When the extrusion roller 63 extrudes the outer frame, the spring 622 can absorb and buffer part of the pressure, avoid generating too large an impact force on the outer frame, and prevent the outer frame from being deformed or damaged due to excessive force.

[0029] Among them, the roller on the extrusion roller 63 is made of silicone rubber. Silicone rubber has excellent elasticity and can better conform to the shape of the outer frame when extruding the outer frame. Even if there are some minor irregularities or curvature changes on the outer frame, the silicone rubber roller can closely contact it through its own elastic deformation, ensuring uniform extrusion force and helping to improve the assembly accuracy of the outer frame and the liquid crystal display screen. At the same time, its flexibility can reduce damage to the surface of the outer frame during the extrusion process and prevent scratching or indentation.

[0030] Among them, the stepper motor a36 and the stepper motor b43 in this technical solution are the same kind of stepper motor, which is convenient to use, and its model is: 57HS22-A.

[0031] The working principle of the auxiliary tooling for assembling the outer frame of the liquid crystal display screen provided by the present invention is as follows: Before assembling the outer frame of the LCD screen, it is necessary to adjust the positions of the two groups of mounting columns 32 in the driving mechanism 3 according to the size of the outer frame, so that the four rolling extrusion mechanisms 6 are adapted to the LCD screens of the same batch and size. The stepping motor b43 controls the rotation of the rotating shaft 41, thereby controlling the rotation of the return-shaped protective pad 42. During the rotation of the return-shaped protective pad 42, when the upward return-shaped protective pad 42 part rotates to the downward position, the dust and impurities on it will fall down due to the action of gravity. During the rotation of the return-shaped protective pad 42, the cleaning bristles 52 on the bottom plate 51 move relative to the return-shaped protective pad 42, so that the surface of the return-shaped protective pad 42 can be comprehensively and carefully cleaned, and the dust, debris and other impurities adhering to it can be effectively removed. The cleaning effect is better than that of simply relying on gravity to drop impurities, and it can ensure that the surface of the protective pad maintains a high degree of cleanliness; put the LCD screen on the protective pad 4 inside the return-shaped mounting frame 1, and align one corner of the LCD screen with the corner of the return-shaped mounting frame 1 (corresponding to the appendix of the instruction manual Figure 2 The outer frame is placed on the LCD screen and aligned with it, the return frame 2 is put down and the return frame 2 is supported by the handle 21 so that it will not be relatively displaced with the return mounting frame 1, the driving mechanism 3 drives the extrusion rollers 63 on the four rolling extrusion mechanisms 6 to move to the four corners of the LCD screen outer frame respectively, the cylinder 61 controls the extrusion rollers 63 under the mounting cylinder 62 to squeeze the outer frame, so that the four corners of the LCD screen outer frame are clamped with the four corners of the LCD screen, and then the driving mechanism 3 drives the four rolling extrusion mechanisms 6 to move along the four sides of the LCD screen outer frame respectively. The four squeezing rollers 63 move synchronously counterclockwise along the outer frame of the LCD screen to squeeze the outer frame of the LCD screen so that the other parts of the outer frame are also snapped onto the LCD screen; the LCD screen is placed by aligning it with one corner of the circular mounting frame, and the outer frame is also aligned with the screen when placed. This precise positioning method, combined with the first snapping of the four corners by the squeezing rollers 63 and the squeezing along the edges, can make the outer frame fit tightly with the LCD screen, ensuring that the outer frame is accurately snapped onto the screen, effectively avoiding problems such as assembly misalignment and uneven gaps, and greatly improving the assembly quality.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen, characterized in that, Comprising: A U-shaped mounting frame (1), a horizontal top plate (11) is fixedly installed in the U-shaped mounting frame (1), a rotatable protective pad (4) is installed on the top plate (11), and a cleaning mechanism (5) for cleaning impurities on the surface of the protective pad (4) is installed at the bottom of the U-shaped mounting frame (1). A rotatable U-shaped frame (2) is installed at the upper end of the U-shaped mounting frame (1), and a handle (21) is fixedly installed on the U-shaped frame (2). Four rolling extrusion mechanisms (6) are installed on the U-shaped frame (2), and a driving mechanism (3) for driving the four rolling extrusion mechanisms (6) to move along the U-shaped frame (2) is also installed on the U-shaped frame (2). The four rolling extrusion mechanisms (6) are respectively located at the four inner corners of the U-shaped frame (2). The rolling extrusion mechanism (6) includes a cylinder (61), the cylinder (61) is fixedly installed on the driving mechanism (3), and the output end of the cylinder (61) is elastically connected with an installation cylinder (62). An extrusion roller (63) is fixedly installed at the bottom of the installation cylinder (62).

2. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 1, characterized in that: The driving mechanism (3) includes four threaded columns (33). Two strip-shaped chutes (31) vertically distributed are formed on the U-shaped frame (2). Two groups of installation columns (32) vertically distributed are detachably connected to the U-shaped frame (2). Two of the threaded columns (33) are respectively rotatably connected in the two strip-shaped chutes (31). A slide rod (35) is fixedly connected between each group of two installation columns (32), and a threaded column (33) is rotatably connected. An installation block (34) that is threadedly connected to the corresponding threaded column (33) and slidably connected to the corresponding slide rod (35) is also installed between each group of two installation columns (32). An installation block (34) that is threadedly connected to the corresponding threaded column (33) is also slidably connected in each strip-shaped chute (31). A stepper motor a (36) for driving the corresponding threaded column (33) to rotate is fixedly installed on the outer wall of the U-shaped frame (2) and the corresponding installation column (32). The four installation blocks (34) are respectively used for installing and fixing the cylinders (61) in the four rolling extrusion mechanisms (6).

3. The auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 2, characterized in that: A U-shaped connecting block (321) that is buckled on the U-shaped frame (2) is fixedly connected to the bottom end of each installation column (32), and the U-shaped connecting block (321) is fixed on the U-shaped frame (2) by a locking bolt (322).

4. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 1, characterized in that: The protective pad (4) includes a U-shaped protective pad (42), the U-shaped protective pad (42) is sleeved on the top plate (11). A rotating shaft (41) is rotatably connected to both sides of the top plate (11), and the U-shaped protective pad (42) is driven to rotate by the rotating shaft (41). A stepper motor b (43) for driving one of the rotating shafts (41) to rotate is fixedly installed on the U-shaped mounting frame (1).

5. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 4, characterized in that: Top blocks (12) fixed to the inner side of the U-shaped mounting frame (1) are installed on both sides of the top plate (11), and the two top blocks (12) are in clearance fit with the U-shaped protective pad (42).

6. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 5, characterized in that: The upper surface of the U-shaped protective pad (42) is on the same horizontal plane as the upper surfaces of the two top blocks (12).

7. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 4, characterized in that: The cleaning mechanism (5) includes cleaning bristles (52). A bottom plate (51) with cleaning bristles (52) mounted on its upper surface is fixedly installed at the bottom of the U-shaped mounting frame (1). The upper ends of the cleaning bristles (52) are abutted against the U-shaped cushion (42).

8. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 7, characterized in that: The cleaning bristles (52) are adhered to the upper surface of the bottom plate (51) by Velcro.

9. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 1, characterized in that: A ejector rod (621) fixedly connected to the output end of the air cylinder (61) is slidably connected in the mounting cylinder (62). A spring (622) is fixedly connected to the lower end of the ejector rod (621), and the other end of the spring (622) is fixedly connected to the inner bottom wall of the mounting cylinder (62). A damping sleeve (623) is also fixedly sleeved on the lower end of the ejector rod (621).

10. An auxiliary tooling for assembling the outer frame of a liquid crystal display screen according to claim 1, characterized in that: The rollers on the pressing rollers (63) are made of silicone rubber.

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