A splicing screen dispensing mechanism and dispensing device

Abstract

This application discloses a dispensing mechanism and device for splicing screens, relating to the technical field of splicing screen processing equipment. It includes a horizontal moving track, a mounting base capable of horizontal movement along the horizontal moving track, and a dispensing head vertically mounted on the mounting base for dispensing adhesive. The mounting base is equipped with a pressure roller seat and a curing lamp seat. The pressure roller seat includes a bottom pressure roller, which is positioned along a direction parallel to the movement direction of the mounting base. The pressure roller is rotatable with its rotation axis horizontal and perpendicular to the movement direction of the mounting base. The bottom of the pressure roller is used to abut against the splicing screen. The bottom of the curing lamp seat is equipped with a curing lamp, the length of which is parallel to the movement direction of the mounting base. The mounting base is equipped with a first driving source for vertically raising and lowering the pressure roller, and a second driving source for vertically moving the curing lamp seat. This application offers the advantages of convenient dispensing operation, improved efficiency, and reduced costs.

Description

Technical Field

[0001] This application relates to the technical field of splicing screen processing equipment, and in particular to a splicing screen dispensing mechanism and dispensing device. Background Technology

[0002] LED video walls, also known as LED cabinet screens, are large or extra-large screens typically composed of multiple independent display units (modules or cabinets). Each display unit is densely covered with LED beads (light-emitting diodes) and driving circuitry. After splicing, adhesive (such as silicone, epoxy resin, or UV adhesive) needs to be applied to the connection points of each display unit and then cured. Specialized UV adhesive or epoxy resin is applied to the seams between modules, and then ultraviolet light is used to accelerate curing.

[0003] Applying adhesive can create a reliable seal, which is crucial for outdoor screens or indoor screens that require protection. After the adhesive cures, it increases the stability and strength of the overall structure, reduces displacement or poor contact caused by vibration, and creates an absolutely flat mirror surface on the screen, improving the viewing experience and making it easier to clean.

[0004] Current dispensing processes typically utilize dispensing devices, which include a three-dimensionally movable dispensing head positioned directly above the display unit. This head can be moved to dispense adhesive into the gaps between adjacent display units. After dispensing, a three-dimensionally movable pressure roller on the dispensing device flattens the dispensing area, and finally, the device moves to the curing lamp position where the adhesive is cured by the light curing lamp.

[0005] However, when changing to different dispensing products, the dispensing head, curing lamp, and pressure roller of the above-mentioned dispensing device are all moved separately, which makes the machine structure complex, the movement procedure cumbersome, and the cost significantly increased. Summary of the Invention

[0006] In order to facilitate dispensing operations, improve efficiency and reduce costs, this application provides a dispensing mechanism and dispensing device for splicing screens.

[0007] In a first aspect, this application provides a splicing screen adhesive dispensing mechanism, which adopts the following technical solution: A splicing screen dispensing mechanism includes a horizontal moving track, a mounting base capable of moving horizontally along the horizontal moving track, and a dispensing head vertically mounted on the mounting base for dispensing adhesive. The mounting base is provided with: The pressure roller seat includes a bottom pressure roller, which is disposed in a direction parallel to the moving direction of the dispensing head. The pressure roller is rotatable and its axis of rotation is horizontal and perpendicular to the moving direction of the mounting seat. The bottom of the pressure roller is used to abut against the splicing screen. A curing lamp holder is provided with a curing lamp at its bottom. The length direction of the curing lamp is parallel to the moving direction of the mounting base. The mounting base is provided with a first driving source for driving the pressure roller to move vertically up and down, and a second driving source for driving the curing lamp holder to move vertically.

[0008] By adopting the above technical solution, the transverse moving track can move horizontally, and the mounting base can move along the length of the transverse moving track. This allows adjustment of the dispensing head's dispensing position, ensuring the adhesive from the dispensing head can be applied to the edges of the display units. The pressure roller seat is located on one side of the dispensing head. When the dispensing head dispenses adhesive and moves, the pressure roller can directly act on the splicing screen, squeezing and flattening the adhesive, allowing for better adhesion between adjacent display units. The curing lamp can then cure the adhesive during movement. In other words, when the mounting base moves, the dispensing head, pressure roller, and curing lamp can all move synchronously, working sequentially on the same path. This significantly improves work efficiency, simplifies the machine structure and movement procedures, and achieves cost reduction and efficiency improvement. Since the first drive source can drive the pressure roller to rise and fall, and the second drive source can drive the curing lamp seat to rise and fall, the positions of the pressure roller and curing lamp can be adjusted, changing the squeezing effect and curing efficiency. This further improves efficiency and applicability, and also allows for rapid lifting of the pressure roller and curing lamp seat to facilitate the movement of the mounting base, reducing interference.

[0009] Optionally, the mounting base includes a main body and a dispensing seat vertically slidably connected to the main body, the second drive source is disposed on the main body, and the dispensing head and pressure roller are disposed on the dispensing seat.

[0010] By adopting the above technical solution, the dispensing base can be raised and lowered vertically, thereby adjusting the height of the dispensing head and the pressure roller together. This allows the dispensing head and the pressure roller to move together once their positions are determined without repeated adjustments, and the curing lamp can be moved without needing to be moved after its position is adjusted.

[0011] Optionally, the main body includes a vertical plate, two second drive sources are provided on the vertical plate, and the output end of each of the second drive sources is connected to a curing lamp holder. One of the curing lamp holders is located on the side of the dispensing head away from the pressure roller seat, and the two curing lamp holders are arranged in parallel.

[0012] By adopting the above technical solution, two curing lamp holders are provided: one located on one side of the dispensing head and the other on the dispensing head's moving path. This allows the curing lamp on the dispensing head's moving path to cure the adhesive on the part of the splicing screen that has just been dispensed after the dispensing head moves. The curing lamp on the lamp holder on one side of the dispensing head can then cure the adhesive on adjacent dispensing paths. Since both curing lamp boxes are driven independently by a second drive source to achieve different lifting and lowering, the positions of the curing lamp boxes can be set according to requirements to achieve different curing effects.

[0013] Optionally, the dispensing base includes a support plate, and both the first drive source and the dispensing head are disposed on the support plate; A movable rod is vertically slidably connected to the support plate, and a sensing plate is provided on the movable rod. The pressure roller seat includes a fixed part connected to the output end of the second drive source, and a sliding part slidably connected to the fixed part. One end of the movable rod is slidably connected to the sliding part, and the position of the movable rod relative to the sliding part can be locked by a locking member. The pressure roller is disposed on the sliding part, and the support plate is provided with a detection member for sensing the position of the sensing plate.

[0014] By adopting the above technical solution, since the sliding part moves relative to the fixed part, and the movable rod can be locked by the locking component after moving relative to the sliding part, the distance from the bottom of the pressure roller to the dispensing head can be finely adjusted. This ensures that the dispensing height of the dispensing head remains constant or changes only slightly during the dispensing process, reducing the impact on the dispensing result. The detection component can use a sensor to determine whether the distance between the dispensing head and the pressure roller has changed, and whether the distance adjustment is in place.

[0015] Optionally, a third drive source is provided on the support plate, which is used to drive the detection component to move vertically up and down.

[0016] By adopting the above technical solution, since the pressure roller may have small changes in height during use, the position of the detection element can also be driven to rise and fall (at least two height states) by a third drive source, and is located in the sensing center area of ​​the sensing sheet, reducing the impact of small changes in the position of the pressure roller on the detection of the detection element.

[0017] Optionally, a drive gear is rotatably connected to the transverse moving track, and a fourth drive source is provided for driving the drive gear to rotate, wherein the rotation axis of the drive gear is parallel to the transverse moving track. A locking and fixing component is vertically slidably mounted on the transverse moving track, and a fifth driving source is used to drive the locking and fixing component to move. The locking and positioning member forms a first wedge-shaped surface on both sides, and the two first wedge-shaped surfaces are inclined and the distance between them gradually increases in the vertical downward direction.

[0018] By adopting the above technical solution, since the transverse moving track and the sliding track on the frame are slidably connected, the fourth drive source drives the drive gear to rotate. The drive gear meshes with the rack structure on the sliding track, thereby realizing the overall movement of the transverse moving track. Because the dispensing head needs to be precisely positioned, ensuring it is directly above the splicing position of the video wall, when the drive gear drives the transverse moving track to the next dispensing position, the fifth drive source can drive the locking component to rise and fall. The first wedge-shaped surface structure adjusts the transverse moving track to the precise position and locks it in place.

[0019] Secondly, this application also provides a splicing screen dispensing device, which adopts the following technical solution: A splicing screen dispensing device includes the dispensing mechanism as described in any one of the above claims, and further includes: Machine tool; The machine tool includes at least two sliding rails arranged parallel to each other. A transverse moving rail is slidably connected to the sliding rails. The sliding rails are provided with racks for meshing with the drive gear. The sliding rails are provided with locking seats at intervals along their length. The locking seats are provided with positioning grooves for the locking fasteners to be inserted into. The positioning grooves form a second wedge-shaped surface on their opposite sidewalls for abutting against the first wedge-shaped surface. A fixing platform is installed on the machine platform and is used to fix the splicing screen.

[0020] By adopting the above technical solution, during use, the horizontal moving track and the sliding track are slidably connected. The rack and pinion, in conjunction with the self-rotating drive gear, enable the horizontal moving track to move along the sliding track. The locking seat can work with the locking fastener to fine-tune and precisely position the horizontal moving track, improving the dispensing accuracy. The splicing screen is fixed on the machine platform by the fixing table to work with the dispensing head.

[0021] Optionally, the fixed platform includes an adsorption plate, which is hollow and has adsorption holes evenly distributed on its surface. The adsorption holes are connected to the middle of the adsorption plate. Multiple pipe interfaces are evenly fixedly connected to the bottom of the adsorption plate. The multiple pipe interfaces are evenly distributed and connected to the middle of the adsorption plate. The ends of the multiple pipes away from the adsorption plate are connected to the same main pipe.

[0022] By adopting the above technical solution, the splicing screen can be fixed on the adsorption plate. Since the splicing screen includes multiple display units, the evenly distributed adsorption holes ensure that each display unit corresponds to a certain number of adsorption holes, allowing the adsorption plate to simultaneously adsorb all display units. The evenly distributed multiple pipe interfaces also ensure that the airflow flows evenly within the adsorption plate cavity, improving the adsorption effect.

[0023] Optionally, the fixing platform includes four limiting edges located around the adsorption plate. The four limiting edges form a rectangular frame to abut against the side wall of the splicing screen. Two adjacent limiting edges are fixed to the fixing platform, while the other two limiting edges are driven by a sixth driving source to move towards and away from the side wall of the splicing screen.

[0024] By adopting the above technical solution, when the splicing screen is placed on the fixed platform, it can abut against two of the limiting edges to form a preliminary positioning. Then, the sixth driving source drives the other two limiting edges to move, thereby adjusting the position of the splicing screen.

[0025] Optionally, the limiting edge is divided into two first limiting edges fixed to the fixed platform and two second limiting edges that can move. Multiple buffer plates are slidably connected to the end of the second limiting edge facing the splicing screen. The buffer plates are used to position a row of display units one by one. An installation strip is fixed to the end of the second limiting edge away from the splicing screen. An elastic element is provided between the buffer plate and the installation strip.

[0026] By adopting the above technical solution, by setting a buffer plate that corresponds one-to-one with a row of display units, and by allowing the buffer plate to move through the elastic force of the elastic element, the position of each row of display units can be adjusted individually when placing them. Furthermore, when the second limit edge moves, the position of the splicing screen can be adjusted as a whole. The setting of the buffer plate can also reduce damage to the display screen.

[0027] In summary, this application includes at least one of the following beneficial effects: 1. By integrating the dispensing, flattening and curing functional modules onto the same mounting base, they can move synchronously and sequentially complete the dispensing, rolling and curing operations on the same gap in a single journey. This changes the complex mode in traditional equipment where each functional unit needs to be independently programmed and coordinated, greatly simplifying the mechanical structure and motion control program. While reducing the manufacturing cost and complexity of the equipment, it significantly improves the production efficiency of continuous operation. 2. By setting two independently controlled curing lamp holders, they can be positioned in front of and behind the dispensing head in the direction of travel. The curing lamp at the rear can perform preliminary curing (pre-curing) on ​​the new glue line that has just been dispensed and flattened, so that it can quickly set and prevent it from flowing and deforming; the curing lamp at the front can have sufficient time to perform deep or secondary curing on the old glue line that has been dispensed in the previous row. 3. The gear-rack transmission combined with the wedge-shaped surface positioning and locking mechanism ensures the precise positioning and rigid locking of the lateral moving track after a wide range of movement, providing a stable reference for the dispensing path; 4. Through the closed-loop feedback or monitoring mechanism composed of the movable rod, the sensing plate and the adjustable detection component, the relative height between the pressure roller and the dispensing head can be finely adjusted and monitored in real time to ensure that the dispensing height and the pressure of the pressure roller remain constant within the set range, thereby ensuring that the width, thickness and flatness of each glue line are highly consistent. 5. The adsorption plate with a uniform adsorption hole array, combined with a multi-point pressure equalization air supply system, can generate a uniform and strong adsorption force on the whole screen spliced ​​by multiple independent display units, effectively preventing local warping or overall displacement of the screen during the processing. 6. The automatically adjustable limit edge enables precise positioning and flexible clamping of the splicing screen from all sides, providing a stable reference platform for high-precision dispensing operations. 7. Since the heights of the dispensing head, pressure roller, and curing lamp can all be adjusted independently, the same equipment can be quickly adapted to displays with different thicknesses and splicing process requirements, improving the equipment's versatility and process scope. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a partial structural diagram of the fixed platform shown in an embodiment of this application; Figure 3 This is a partial structural diagram illustrating the bottom structure of the fixed platform according to an embodiment of this application; Figure 4 This is a partial structural schematic diagram illustrating the limiting edge structure in an embodiment of this application; Figure 5 This is a partial cross-sectional structural diagram illustrating the second limiting edge movement mode in an embodiment of this application; Figure 6 This is a schematic diagram of the overall structure of the lateral moving track according to an embodiment of this application; Figure 7 This is a partial structural schematic diagram illustrating the lateral movement track and the sliding track drive structure in an embodiment of this application; Figure 8 This is a partial structural diagram illustrating the structure of the adhesive dispensing base in an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Lateral moving track; 11. Drive gear; 12. Fourth drive source; 13. Locking and fixing component; 131. First wedge-shaped surface; 14. Fifth drive source; 2. Mounting base; 21. Main body; 211. Vertical plate; 22. Dispensing base; 221. Support plate; 2211. Movable rod; 2212. Sensing plate; 2213. Detection component; 2214. Third drive source; 23. Dispensing machine; 231. Dispensing head; 24. Pressure roller base; 241. Pressure roller; 242. Fixing part; 243. Sliding part; 25. Curing lamp holder; 251. Curing lamp; 26. First drive source; 27. Second drive source; 28. Glue storage cylinder; 3. Machine base; 4. Sliding track; 41. Rack; 42. Locking seat; 421. Positioning groove; 4211. Second wedge surface; 5. Fixing platform; 51. Adsorption plate; 511. Main pipe; 512. Pipe interface; 52. Limiting edge; 521. First limiting edge; 522. Second limiting edge; 523. Buffer plate; 524. Elastic element; 525. Guide rod; 53. Sixth drive source; 54. Mounting strip; 6. Splicing screen; 61. Display unit. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will be described in further detail.

[0031] This application discloses a splicing screen dispensing device and its included dispensing mechanism, which integrates one-piece movable dispensing, flattening, and curing functions, aiming to simplify the equipment structure, optimize the operation process, and improve the dispensing and sealing efficiency and quality of splicing screen gaps. (Refer to...) Figure 1 Specifically, the splicing screen 6 that requires adhesive application in this application includes multiple display units 61, which are arranged in a rectangular pattern to form multiple rows. The step of bonding the multiple rows of display units 61 into a whole is performed in this device.

[0032] Reference Figure 1 The splicing screen dispensing device includes the above-mentioned dispensing mechanism, as well as a machine base 3, a fixed platform 5 for supporting and fixing the splicing screen 6 to be processed, and a moving track system that enables movement in a two-dimensional plane.

[0033] Reference Figure 2 and Figure 3 A fixing platform 5 is mounted on the machine base 3 for horizontally fixing and positioning multiple rows of display units 61. Specifically, the fixing platform 5 includes a hollow adsorption plate 51 with numerous adsorption holes evenly distributed on its surface, all of which communicate with the internal cavity of the adsorption plate 51. At the bottom of the adsorption plate 51, multiple pipe interfaces 512 are evenly distributed, all communicating with the internal cavity and ultimately converging to a main pipe 511. When the main pipe 511 is connected to a negative pressure device, airflow passes evenly through all the adsorption holes, thereby stably adsorbing and fixing the splicing screen 6 placed on the plate, effectively preventing it from shifting during processing.

[0034] Reference Figure 2 and Figure 4 To further ensure positioning accuracy, four limiting edges 52 are provided around the adsorption plate 51, forming a rectangular frame. Two adjacent limiting edges 52 are the first limiting edges 521, which are fixed to the platform 5. The lengths of the two first limiting edges 521 can be the same or different, depending on the size of the platform 5. The first limiting edges 521 are used for initial positioning of the splicing screen 6, and their surfaces are provided with wedge-shaped surfaces that gradually slope downwards towards the splicing screen 6 to support it.

[0035] The other two opposing limiting edges 52 are the second limiting edges 522. These can be controlled to move towards the center via the sixth drive source 53 (such as a cylinder or electric push rod) mounted on the fixed platform 5, clamping the splicing screen 6 from both sides, thus achieving precise positioning and clamping of the screen. Similarly, the second limiting edges 522 can be the same or different, depending on the size of the fixed platform 5.

[0036] Reference Figure 4 and Figure 5A buffer plate 523 is slidably connected to the side of the splicing screen 6 along the second limiting edge 522. The number of buffer plates 523 corresponds to the number of rows of display units 61, and their positions are also one-to-one. A mounting strip 54 is fixed to the end of the second limiting edge 522 away from the buffer plate 523. The buffer plate 523 passes through the second limiting edge 522 via a guide rod 525 and is slidably connected to the second limiting edge 522, with the sliding direction along the direction of approaching and moving away from the splicing screen 6. The surface of the buffer plate 523 is provided with a wedge-shaped surface that gradually slopes downward toward the splicing screen 6, and an elastic element 524, which can be a spring, is provided between the buffer plate 523 and the mounting strip 54.

[0037] By setting buffer plates 523 corresponding one-to-one with the display units 61, and by allowing the buffer plates 523 to move through the elastic force of the elastic element 524, the position of each row of display units 61 can be adjusted individually when placing them. Furthermore, when the second limiting edge 522 moves, the position of the splicing screen 6 can be adjusted as a whole. The setting of the buffer plates 523 can also reduce damage to the display screen. In specific positioning, the sixth driving source 53 can drive the second limiting edge 522 to move, so that the second limiting edge 522 and the first positioning edge clamp and position the splicing screen 6. After completion, the sixth driving source 53 drives the second limiting edge 522 to move in the opposite direction. The elastic force of the elastic element 524 stabilizes the position of the splicing screen 6 and prevents each display unit 61 from being too tightly pressed, thus affecting the dispensing operation.

[0038] Reference Figure 1 and Figure 6 The moving track system includes at least two parallel sliding tracks 4 fixed on the machine base 3 and a transverse moving track 1 that can move along the sliding tracks 4. Specifically, the sliding tracks 4 are located above the fixed platform 5. The transverse moving track 1 is slidably connected to the two sliding tracks 4 by a slider or a sliding sleeve, so that it can slide horizontally along the Y-axis. In this embodiment, a slide seat with a dovetail groove is provided on the transverse moving track 1, and a dovetail strip that slides in the dovetail groove is formed on the sliding track 4.

[0039] Reference Figure 6 and Figure 7 To achieve precise driving and positioning, a rack 41 is installed on one side of the sliding track 4, while a fourth drive source 12 (such as a motor) and its driven gear 11 are installed on the transverse moving track 1. The transverse moving track 1 is rotatably connected to a shaft along its length, and two drive gears 11 are coaxially fixed at both ends of the shaft and mesh with a rack 41 respectively. One of the drive gears 11 is driven to rotate by the fourth drive source 12 via a belt and pulley.

[0040] The longitudinal position of the transverse moving track 1 can be controlled by the meshing of gears and racks 41. Multiple locking seats 42 are installed at intervals along the length of the sliding track 4, each with a positioning groove 421. Correspondingly, a locking positioning member 13 is vertically slidably installed on the transverse moving track 1 and is driven to rise and fall by a fifth drive source 14. The locking positioning member 13 has inclined first wedge-shaped surfaces 131 machined on both sides, while the opposing inner walls of the positioning grooves 421 form second wedge-shaped surfaces 4211 that cooperate with it. When the transverse moving track 1 moves to its approximate position, the fifth drive source 14 drives the locking positioning member 13 to descend, inserting it into the positioning groove 421 of the locking seat 42. Through the tight fit of the two sets of wedge-shaped surfaces, the precise position of the transverse moving track 1 can be automatically corrected and locked, eliminating transmission gaps and providing a stable reference for dispensing.

[0041] Reference Figure 6 and Figure 8 The dispensing mechanism is the core of the entire device, including the mounting base 2. The mounting base 2 can move horizontally along the transverse moving track 1 in the X-axis direction, which can be achieved by using a motor screw structure or a linear motor. The mounting base 2 integrates three major functional units: dispensing, flattening, and pre-curing, and can achieve synchronous integrated movement.

[0042] Specifically, the mounting base 2 includes a main body 21 and a dispensing base 22 that is vertically slidably connected to it via a linear guide rail. The dispensing base 22 can be driven by a motor screw structure or a linear motor. A dispensing machine 23 and a pressure roller base 24 are mounted on the dispensing base 22. The dispensing machine 23 includes a vertically downward-facing dispensing head 231 for extruding UV adhesive or other optical adhesive into the gaps of the splicing screen 6. The dispensing machine 23 can be programmed to control the dispensing time and amount. A glue reservoir 28 is also fixed on the main body 21, connected to the dispensing machine 23 via a hose, which can replenish the glue for the dispensing machine 23.

[0043] The pressure roller seat 24 is located on one side of the dispensing head 231 along the X-axis direction of movement. A pressure roller 241 is rotatably connected to its bottom. The axis of the pressure roller 241 is horizontal and perpendicular to the direction of movement (i.e., the Y-axis direction). The pressure roller seat 24 is driven by a first drive source 26 (e.g., a cylinder) fixed to the dispensing seat 22. It can be vertically raised and lowered independently relative to the dispensing seat 22, thereby controlling the contact pressure of the pressure roller 241 on the glue line in the gap, and retracting the pressure roller 241 when the mounting seat 2 needs to be moved quickly.

[0044] On the other side of the dispensing head 231, a second drive source 27 (e.g., a cylinder) is fixed on the main body 21 of the mounting base 2. A curing lamp holder 25 is fixedly connected to the output end of the drive source 27. A long, strip-shaped curing lamp 251 (e.g., a UV LED strip) is mounted at the bottom of the curing lamp holder 25, its length parallel to the X-axis. Multiple curing lamps 251 can be simultaneously connected. The second drive source 27 can drive the curing lamp holder 25 to rise and fall as a whole. Preferably, two sets of the second drive source 27 and the curing lamp holder 25 are symmetrically arranged, located at different positions on the dispensing head 231. One set is located on the side of the dispensing head 231 away from or near the pressure roller 241, used for initial pre-curing of the glue line that has just been dispensed and flattened; the other set is located on one side of the dispensing head 231, used for secondary main curing or supplementary curing of the adjacent glue line in the previous row. This design allows for sequential dispensing, flattening, and pre-curing of new gaps, as well as deep curing of treated old gaps, within a single X-axis stroke of the dispensing mechanism, greatly improving efficiency.

[0045] Reference Figure 6 and Figure 8 To achieve fine-tuning of the distance between the pressure roller 241 and the dispensing head 231, the pressure roller seat 24 is designed as a split structure, including a fixed part 242 connected to the output end of the first drive source 26, and a sliding part 243 slidably connected thereto. The pressure roller 241 is mounted on the sliding part 243. A movable rod 2211 is vertically slidably connected to the support plate 221 of the dispensing seat 22. The bottom end of the movable rod 2211 is slidably connected to the sliding part 243 and can be fixed by bolts or other locking devices. A sensing plate 2212 is fixed to the top end of the movable rod 2211. The sensing plate 2212 is slidably connected to the support plate 221 and can be adjusted and locked by limiting devices (such as a set nut and a threaded connection between the movable rod 2211 and the sensing plate 2212). By adjusting the fixed positions of the movable rod 2211 and the sliding part 243, the sliding part 243 and the pressure roller 241 can be driven to make a slight height adjustment relative to the dispensing head 231, thereby accurately setting the relative height difference between the dispensing head 231 outlet and the bottom of the pressure roller 241.

[0046] To monitor whether this height difference is within the set range, a detection element 2213 (such as a photoelectric sensor) capable of sensing the position of the sensing element 2212 is also installed on the support plate 221. To further improve adaptability, a third drive source 2214 can also be provided on the support plate 221 to drive the detection element 2213 to perform a small range of vertical lifting and lowering, so that its sensing window can always be aligned with the effective activity range of the sensing element 2212, ensuring the reliability of the detection.

[0047] In other preferred embodiments of this application, the dispensing device is further provided with a secondary dispensing mechanism. The structure of the secondary dispensing mechanism is the same as that of the dispensing mechanism. The corresponding transverse moving track 1 can also move along the sliding track 4. While the original dispensing mechanism is working, the secondary dispensing mechanism can also perform one or more of the following tasks: glue replenishment, flattening and curing, which greatly improves the applicability of the device.

[0048] The implementation principle of the splicing screen dispensing mechanism and dispensing device in this application embodiment is as follows: During operation, the splicing screen 6 is fixed on the fixed platform 5. The dispensing device, according to a preset program, controls the horizontal moving track 1 to move along the Y-axis to the starting end of the target gap and locks it by the locking positioning component 13. Then, the mounting base 2 drives the dispensing base 22 and the pressure roller 241 to move vertically to the specified height. The mounting base 2 slides along the horizontal moving track 1. During the movement, the dispensing head 231 first applies glue to the gap and moves horizontally; the pressure roller 241, which follows, also moves horizontally, pressing the glue into the gap and making its surface flat; the curing lamp 251 located behind it irradiates the glue that has just been flattened to make it initially set. After the treatment of one gap is completed, the horizontal moving track 1 is unlocked, moved and locked to the position of the next gap, and the above process is repeated. At the same time, the curing lamp 251 located in front of the dispensing head 231 can supplement the irradiation of the glue line of the previous gap to ensure complete curing. By integrating and synchronously moving the functions of dispensing, flattening, and curing, this device achieves efficient, precise, and high-quality sealing of the six gaps in splicing screens.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A splicing screen dispensing mechanism, comprising a horizontal moving track (1), a mounting base (2) capable of horizontally moving along the horizontal moving track (1), and a dispensing head (231) vertically disposed on the mounting base (2) for dispensing adhesive, characterized in that: The mounting base (2) is provided with: The pressure roller seat (24) includes a pressure roller (241) at the bottom. The pressure roller seat (24) is arranged in a direction parallel to the moving direction of the dispensing head (231) and the pressure roller (241) is rotatable and the axis of rotation is horizontal and perpendicular to the moving direction of the mounting seat (2). The bottom of the pressure roller (241) is used to abut against the splicing screen (6). Curing lamp holder (25), the bottom of the curing lamp holder (25) is provided with a curing lamp (251), the length direction of the curing lamp (251) is parallel to the moving direction of the mounting base (2), the mounting base (2) is provided with a first driving source (26) for driving the pressure roller (241) to move vertically, and a second driving source (27) for driving the curing lamp holder (25) to move vertically.

2. The splicing screen dispensing mechanism according to claim 1, characterized in that, The mounting base (2) includes a main body (21) and a dispensing seat (22) that is vertically slidably connected to the main body (21). The second drive source (27) is disposed on the main body (21), and the dispensing head (231) and the pressure roller (241) are disposed on the dispensing seat (22).

3. The splicing screen dispensing mechanism according to claim 2, characterized in that, The main body (21) includes a vertical plate (211). Two second drive sources (27) are provided on the vertical plate (211), and the output end of each of the second drive sources (27) is connected to a curing lamp holder (25). One curing lamp holder (25) is located on the side of the dispensing head (231) away from the pressure roller seat (24), and the two curing lamp holders (25) are arranged in parallel.

4. The splicing screen dispensing mechanism according to claim 2, characterized in that, The dispensing base (22) includes a support plate (221), and the first drive source (26) and the dispensing head (231) are both disposed on the support plate (221); A movable rod (2211) is vertically slidably connected to the support plate (221). A sensing element (2212) is provided on the movable rod (2211). The pressure roller seat (24) includes a fixed part (242) connected to the output end of the second drive source (27) and a sliding part (243) slidably connected to the fixed part (242). One end of the movable rod (2211) is slidably connected to the sliding part (243) and can lock the position of the movable rod (2211) relative to the sliding part (243) by a locking member. The pressure roller (241) is provided on the sliding part (243). The support plate (221) is provided with a detection element (2213) for sensing the position of the sensing element (2212).

5. The splicing screen dispensing mechanism according to claim 4, characterized in that, A third drive source (2214) is provided on the support plate (221), which is used to drive the detection component (2213) to move vertically up and down.

6. The splicing screen dispensing mechanism according to claim 1, characterized in that, A drive gear (11) is rotatably connected to the transverse moving track (1), and a fourth drive source (12) is provided for driving the drive gear (11) to rotate. The rotation axis of the drive gear (11) is parallel to the transverse moving track (1). A locking and fixing component (13) is vertically slidably disposed on the transverse moving track (1), and a fifth driving source (14) is used to drive the locking and fixing component (13) to move. The locking and positioning member (13) forms a first wedge-shaped surface (131) on both sides. The two first wedge-shaped surfaces (131) are inclined and the distance between them gradually increases in the vertical downward direction.

7. A splicing screen dispensing device, comprising the dispensing mechanism as described in any one of claims 1-6, characterized in that, Also includes: Machine (3); The sliding rail (4) has at least two parallel sliding rails (4) arranged on the machine base (3). The transverse moving rail (1) is slidably connected to the sliding rail (4). The sliding rail (4) is provided with a rack (41) for meshing with the drive gear (11). The sliding rail (4) is provided with locking seats (42) spaced apart along its length. The locking seats (42) are provided with positioning grooves (421) for the locking fasteners to be inserted. The positioning grooves (421) form a second wedge surface (4211) on the opposite sidewall for abutting against the first wedge surface (131). A fixed platform (5) is set on the machine base (3) for fixing the splicing screen (6).

8. The splicing screen dispensing device according to claim 7, characterized in that, The fixed platform (5) includes an adsorption plate (51). The adsorption plate (51) is hollow and has adsorption holes evenly distributed on its surface. The adsorption holes are connected to the middle of the adsorption plate (51). Multiple pipe interfaces (512) are evenly fixedly connected to the bottom of the adsorption plate (51). The multiple pipe interfaces (512) are evenly distributed and connected to the middle of the adsorption plate (51). The ends of the multiple pipes away from the adsorption plate (51) are connected to the same main pipe (511).

9. A splicing screen dispensing device according to claim 8, characterized in that, The fixed platform (5) includes four limiting edges (52) located around the adsorption plate (51). The four limiting edges (52) form a rectangular frame to abut against the side wall of the splicing screen (6). Two adjacent limiting edges (52) are fixed to the fixed platform (5), and the other two limiting edges (52) are driven by the sixth driving source (53) to move towards and away from the side wall of the splicing screen (6).

10. A splicing screen dispensing device according to claim 9, characterized in that, The limiting edge (52) is divided into two first limiting edges (521) fixed to the fixed platform (5) and two second limiting edges (522) that can move. Multiple buffer plates (523) are slidably connected to the end of the second limiting edge (522) facing the splicing screen (6). The buffer plates (523) are used to position a row of display units (61) one by one. An installation strip (54) is fixed to the end of the second limiting edge (522) away from the splicing screen (6). An elastic element (524) is provided between the buffer plate (523) and the installation strip (54).

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