A liquid crystal display screen cutting device
Patent Information
- Application Number
- CN202522223394.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-21
AI Technical Summary
[0003]本实用新型的目的在于至少解决现有技术中存在的技术问题之一，提供一种液晶显示屏裁切装置，能够解决现有设备对显示屏固定稳定性不足，裁切时易因位移导致偏差，且缺乏裁切区域二次清理机制的问题
1、该液晶显示屏裁切装置，进口处的预清理装置中，弹簧带动滚筒刷紧密贴合显示屏，转轴驱动滚筒刷转动刷除表面杂质，避免杂质影响裁切质量，且能适应不同厚度显示屏，防止过度挤压损坏，夹持气吹装置中，电动伸缩杆调整支架高度适配不同厚度显示屏，吸盘固定显示屏防止裁切位移，气吹头配合气泵二次清理裁切区域，进一步保障裁切质量，整体提升装置的实用性与可靠性。
Smart Images
Figure CN224750376U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid crystal display technology, and in particular to a liquid crystal display cutting device. Background Technology
[0002] As electronic devices become thinner, lighter, and more precise, LCD screens, as core display components, are now used in a wide range of applications, including smartphones, tablets, and smart TVs. The demand for customized screen size and shape is growing, and the cutting process has become a key part of the LCD screen production process, requiring the precise cutting of the finished LCD substrate into individual units that meet product specifications. Currently, mainstream LCD screen cutting equipment on the market has basic conveying and cutting functions, usually using conveyor belts, belt conveyors, etc. as the conveying carrier to realize the movement of the display screen to be cut inside the equipment; The core of the cutting process consists of a laser generator, laser head, and a matching mobile platform. Some devices are also equipped with clamping mechanisms, such as mechanical grippers and suction cups, to fix the display screen and reduce displacement during cutting. While these devices can meet basic cutting requirements, they are significantly lacking in cleaning functionality. They do not have corresponding cleaning mechanisms designed for impurities that adhere to the LCD screen during transportation and storage, such as dust particles, debris, and tiny contaminants attracted by electrostatic discharge. This leads to multiple problems during the cutting process. Impurities adhering to the surface of the LCD screen can directly interfere with the energy transmission and focusing effect of laser cutting. When the laser acts on the cutting path, if the impurities are located at the laser landing point, the local laser energy may be blocked or dispersed, resulting in burrs, gaps or uneven depths at the cutting edge. Especially for substrates such as flexible LCD screens that are easily affected by external forces, impurities may also cause the cutting path to shift, further reducing dimensional accuracy. Unremoved impurities may be melted by the high temperature of the laser during the cutting process, and adhere to the surface of the display substrate, forming stains or scorch marks that are difficult to remove, directly resulting in poor appearance of the display screen; In summary, the lack of a targeted cleaning mechanism in existing LCD screen cutting equipment makes it impossible to effectively remove impurities from the screen surface before and during cutting. This has become a key bottleneck restricting the improvement of cutting accuracy, product yield optimization, and production efficiency, making it difficult to meet the current production requirements of high precision, high quality, and high automation for LCD screens. It is urgent to add a cleaning function to the equipment design to solve the above problems. Utility Model Content
[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a liquid crystal display screen cutting device that can solve the problems of insufficient stability of the display screen fixation in the existing equipment, easy deviation due to displacement during cutting, and lack of secondary cleaning mechanism for the cutting area.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a liquid crystal display screen cutting device, comprising a housing, wherein an inlet and an outlet are respectively provided at the front and rear ends of the housing, and the inlet and outlet are arranged correspondingly in the horizontal direction; A laser generator is fixedly installed on the top of the outer shell, a moving platform is fixedly installed on the top of the inner shell, and a laser head is fixedly installed below the moving platform. The laser head and the laser generator are connected to each other through optical paths. A base is fixedly installed at the bottom of the outer shell, and a conveying assembly is fixedly installed inside the base. The conveying direction of the conveyor belt in the conveying assembly is set from the inlet to the outlet, and its conveying surface is located on the inner side of the bottom of the outer shell. A collection box is fixedly installed at the bottom of the base, and the collection box is located below the conveyor belt; A clamping air blowing device is fixedly installed on the base, and the clamping air blowing device is located inside the housing and above the conveyor belt's conveying path. A pre-cleaning device is fixedly installed at the inlet of the housing, and the pre-cleaning device is located above the starting end of the conveyor belt's conveying path and along the conveying direction. The pre-cleaning device and the clamping air blowing device are arranged sequentially.
[0005] Preferably, the conveyor surface of the conveyor belt has a hollow structure, and the hollow structure is configured to correspond to the opening of the collection box.
[0006] Preferably, the clamping air blowing device includes an electric telescopic rod, a bracket, an air blowing head, a suction cup, and an air pump; The electric telescopic rod is fixedly installed on the base and located on the side of the conveyor belt. The bracket is fixedly installed on the upper end of the electric telescopic rod. The air blower is fixedly installed on the inner side of the bracket facing the conveyor belt conveying path. The suction cup is fixedly installed on the bracket below the conveyor belt conveying surface. The air pump is fixedly installed above the rear end of the bracket.
[0007] Preferably, the air blower head is connected to the air pump via a pipe, and the suction cup is connected to the air pump via a pipe.
[0008] Preferably, the pre-cleaning device includes a roller brush, a rotating shaft, a guide rail groove, a slider, a support rod, and a spring; The two guide rail grooves are symmetrically distributed and fixedly installed on the inner walls of both sides of the housing, and are located above the conveyor belt at the inlet; The two sliders are slidably installed in the two guide rail grooves respectively, and the two ends of the rotating shaft are rotatably connected to the opposite sides of the two sliders respectively. The roller brush is fixedly installed on the rotating shaft and its outer circumferential surface is opposite to the conveying surface of the conveyor belt.
[0009] Preferably, the upper end of the guide rail groove is provided with a through hole, the lower end of the support rod is fixedly installed on the slider, and the upper end passes through the through hole and can slide up and down along the through hole; The spring is sleeved on the support rod, and the two ends of the spring are respectively fixedly installed on the upper end face of the slider and the inner wall of the through hole of the guide rail groove.
[0010] Preferably, the laser generated by the laser generator can be transmitted to the laser head through an optical path, and the irradiation direction of the laser head is perpendicular to the conveyor surface of the conveyor belt.
[0011] Preferably, the laser head is located between the clamping air blowing device and the outlet, and the projection area of the laser head covers the conveyor belt's transport path.
[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In the pre-cleaning device at the inlet of this LCD screen cutting device, a spring drives a roller brush to fit tightly against the screen, and a rotating shaft drives the roller brush to rotate and remove surface impurities, preventing impurities from affecting the cutting quality. It can also adapt to screens of different thicknesses and prevent damage from excessive compression. In the clamping air blowing device, an electric telescopic rod adjusts the height of the bracket to adapt to screens of different thicknesses, a suction cup fixes the screen to prevent cutting displacement, and the air blowing head works with an air pump to clean the cutting area a second time, further ensuring the cutting quality and improving the practicality and reliability of the device as a whole.
[0013] 2. This LCD screen cutting device uses a conveyor belt to transport the LCD screen from the inlet to the outlet, achieving automated transport, reducing manual intervention, and improving overall cutting efficiency. The hollow structure of its conveyor surface, in conjunction with the collection box inside the base, can collect the cleaned dust and impurities. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of a liquid crystal display screen cutting device according to the present invention; Figure 2 This utility model Figure 1 Enlarged view of point A; Figure 3 This is a schematic diagram of a liquid crystal display screen cutting device according to the present invention; Figure 4 This is a cross-sectional view of a liquid crystal display screen cutting device according to the present invention. Figure 1 ; Figure 5This is a cross-sectional view of a liquid crystal display screen cutting device according to the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the interior of the outer shell of this utility model.
[0015] Reference numerals: 1. Outer shell; 2. Laser generator; 3. Inlet; 4. Roller brush; 5. Conveyor belt; 6. Base; 7. Rotary shaft; 8. Guide rail groove; 9. Slider; 10. Support rod; 11. Spring; 12. Moving platform; 13. Laser head; 14. Electric telescopic rod; 15. Bracket; 16. Air blower head; 17. Suction cup; 18. Collection box; 19. Air pump; 20. Outlet. Detailed Implementation
[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0018] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.
[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0020] Please see Figure 1-6This utility model provides a technical solution: a liquid crystal display screen cutting device. It includes a housing 1, with an inlet 3 and an outlet 20 at its front and rear ends respectively, and the inlet 3 and outlet 20 are arranged horizontally. A laser generator 2 is fixedly installed on the top of the housing 1, and a moving platform 12 is fixedly installed on the top inside the housing 1. A laser head 13 is fixedly installed below the moving platform 12, and the laser head 13 is connected to the laser generator 2 via an optical path. The laser generated by the laser generator 2 can be transmitted to the laser head 13. The outer shell 1 serves as the protective and support structure for the entire device. The inlet 3 and outlet 20 at its front and rear ends are arranged horizontally to form a conveying channel for the liquid crystal display screen. This ensures that the liquid crystal display screen to be cut can enter the device from the inlet 3 along the horizontal path and be sent out from the outlet 20 after cutting. The laser generator 2 fixed on the top of the outer shell 1 is the energy source for laser cutting. The laser generated by it is transmitted through the optical path to the laser head 13 below the top moving platform 12 inside the outer shell 1. The laser head 13 serves as the laser output terminal and can focus the laser on the position to be cut. The moving platform 12 can drive the laser head 13 to adjust its position, thereby adapting to the cutting requirements of liquid crystal display screens of different sizes and ensuring that the laser head 13 can be accurately aligned with the cutting path. A base 6 is fixedly installed at the bottom of the outer casing 1. A conveyor belt assembly is fixedly installed inside the base 6. The conveyor belt 5 in the conveyor assembly is driven by a motor and the conveying direction is set from the inlet 3 to the outlet 20. Its conveying surface is located on the inner side of the bottom of the outer casing 1. A collection box 18 is fixedly installed at the bottom of the base 6. The collection box 18 is located below the conveyor belt 5. The conveying surface of the conveyor belt 5 has a hollow structure to allow dust and impurities to fall into the collection box 18. A cleaning port is opened on the side of the collection box 18, and an opening and closing door is provided at the cleaning port. When it is necessary to clean the impurities inside the collection box 18, the opening and closing door can be opened and the cleaning can be carried out through the cleaning port. The base 6 at the bottom of the outer casing 1 provides stable support for the entire device. The conveyor belt 5 fixed inside it is the conveying carrier of the LCD screen. The conveying direction is set from the inlet 3 to the outlet 20. The conveying surface is located on the inner side of the bottom of the outer casing 1. The LCD screen to be cut is placed on the conveying surface of the conveyor belt 5 and moves from the inlet 3 to the outlet 20 as the conveyor belt 5 rotates. A clamping air blowing device is fixedly installed on the base 6, and the clamping air blowing device is located inside the outer shell 1 and above the conveying path of the conveyor belt 5. A pre-cleaning device is fixedly installed at the inlet 3 of the outer shell 1. The pre-cleaning device is located above the starting end of the conveying path of the conveyor belt 5, and the pre-cleaning device and the clamping air blowing device are arranged in sequence along the conveying direction. The clamping air blowing device on the base 6 is located inside the outer shell 1 and above the conveyor belt 5. During the cutting process, it fixes the LCD screen and cleans the impurities in the cutting area. The pre-cleaning device at the inlet 3 of the outer shell 1 is located above the starting end of the conveyor belt 5. It is used to perform preliminary cleaning on the LCD screen that just enters the device. Along the conveying direction of the conveyor belt 5, the pre-cleaning device and the clamping air blowing device are arranged in sequence to form a process of cleaning first and then fixing and cutting: the LCD screen to be cut first enters through the inlet 3 and is conveyed by the conveyor belt 5 to the pre-cleaning device to complete the preliminary cleaning. Then it continues to be conveyed to the clamping air blowing device, where it is fixed and the cutting area is cleaned. Finally, after cutting, it is conveyed to the outlet 20. The clamping air blowing device includes: an electric telescopic rod 14, a bracket 15, an air blowing head 16, a suction cup 17, and an air pump 19; The electric telescopic rod 14 is fixedly installed on the base 6 and located on the side of the conveyor belt 5. The bracket 15 is fixedly installed on the upper end of the electric telescopic rod 14. Multiple air blowers 16 are fixedly installed on the inner side of the bracket 15 facing the conveyor belt 5 and covering the entire cutting area of the display screen. The suction cup 17 is fixedly installed below the conveyor surface of the bracket 15 facing the conveyor belt 5. The air pump 19 is fixedly installed above the rear end of the bracket 15, and the multiple air blowers 16 are connected to the air pump 19 through pipelines. The electric telescopic rod 14 is fixed on the base 6 and located on the side of the conveyor belt 5. It can move the upper bracket 15 up and down by telescopic movement, thereby adjusting the distance between the bracket 15 and the conveyor belt 5 to accommodate LCD screens of different thicknesses. The bracket 15 serves as an installation carrier. Its air blower 16 facing the inner side of the conveying path is connected to the air pump 19 above the rear end of the bracket 15 through a pipeline. The air pump 19 provides an air source. Multiple air blowers 16 can blow airflow into the cutting area of the LCD screen to clean the surface of small impurities. The suction cup 17 facing the lower side of the bracket 15 generates negative pressure under the action of an independent air source (not shown in the figure). When the bracket 15 descends to the appropriate position, the suction cup 17 adheres to the surface of the LCD screen and firmly fixes it to the conveyor belt 5 to prevent displacement during cutting. Among them, the air blower 16 can be installed at different angles as needed to meet the airflow requirements of different areas of the LCD screen; The pre-cleaning device includes: a roller brush 4, a rotating shaft 7, a guide rail groove 8, a slider 9, a support rod 10, and a spring 11; Among them, roller brush 4 is a flexible brush; Two guide rail grooves 8 are symmetrically distributed and fixedly installed on the inner walls of both sides of the outer casing 1, and are located above the conveyor belt 5 at the inlet 3. Two sliders 9 are slidably installed in the two guide rail grooves 8. The two ends of the rotating shaft 7 are rotatably connected to the opposite sides of the two sliders 9. The roller brush 4 is fixedly installed on the rotating shaft 7 and its outer circumferential surface is opposite to the conveying surface of the conveyor belt 5. A through hole is opened at the upper end of the guide rail groove 8. The lower end of the support rod 10 is fixedly installed on the slider 9, and the upper end passes through the through hole and can slide up and down along the through hole. The spring 11 is sleeved on the support rod 10, and the two ends of the spring 11 are fixedly installed on the upper end face of the slider 9 and the inner wall of the through hole of the guide rail groove 8, respectively. Two symmetrically distributed guide rail grooves 8 are fixed on the inner walls of both sides of the outer casing 1 and above the conveyor belt 5 at the inlet 3, providing sliding tracks for the sliders 9. The two sliders 9 slide in the guide rail grooves 8 respectively. The rotating shaft 7 connected to their opposite sides can move synchronously with the sliders 9. The roller brush 4 fixed on the rotating shaft 7 rotates with the rotating shaft 7. Its outer circumference is opposite to the conveying surface of the conveyor belt 5. When the LCD screen is conveyed to the bottom of the roller brush 4, the roller brush 4 contacts the surface of the screen and rotates to remove dust, debris and other impurities from the surface. The through hole at the upper end of the guide rail groove 8 allows the support rod 10 to pass through. The lower end of the support rod 10 is fixed on the slider 9, and the upper end can slide up and down along the through hole. The two ends of the spring 11 sleeved on the support rod 10 are fixed to the upper end face of the slider 9 and the inner wall of the through hole of the guide rail groove 8 respectively. The elastic force of the spring 11 makes the slider 9 always have a downward sliding tendency, thereby driving the roller brush 4 to fit tightly against the surface of the LCD screen to ensure the cleaning effect. At the same time, it can adapt to screens of different thicknesses and avoid excessive squeezing and damage to the screen. The roller brush 4 has flexible bristles, which exert less resistance on the LCD screen than the frictional force of the conveyor belt 5. Therefore, it does not affect the forward movement of the LCD screen, ensuring normal screen transport. For example, the roller brush is made of 0.12mm diameter PA66 nylon filaments (flexible, tensile strength ≥5N / brush); the bristle length is 12mm, and the ends are rounded; the contact gap between the roller brush and the screen is 0.8mm, and the shaft speed is 100r / min (low-speed rotation to reduce relative friction between the bristles and the screen); the conveyor belt is made of nitrile rubber (oil-resistant, high-friction) with a thickness of 2mm; the surface is decorated with diamond-shaped anti-slip texture (texture depth 0.25mm, spacing 2mm); the conveyor belt speed is 0.5m / s (the uniform speed of screen movement), and the tensioning structure keeps the conveyor belt taut, allowing the screen to move at a uniform speed without jamming or deviation; the bristles only remove dust from the screen surface (low resistance, no scratches to the screen), and the conveyor belt transports stably, meeting the production rhythm.
[0021] The structure and principle of conveyor belt 5 are similar to existing plate chain transport equipment, which is well known to professionals in this field. Therefore, its internal structure will not be described in detail. Common models include BP50 and BP100. The core principle of laser generator 2 is to achieve population inversion through an excitation medium, such as optical fiber or CO2 gas, and then generate a high-energy laser beam through a resonant cavity amplification. Common models such as the IPG YLR series fiber lasers achieve high beam quality output through optical fiber gain medium, which is suitable for the precision cutting requirements of LCD screens. CO2 lasers such as the Rofin Sinar series generate infrared lasers through gas discharge, which are suitable for cutting scenarios of different materials. Laser head 13 focuses the beam transmitted from the laser generator. Its principle is to compress the spot diameter and increase the energy density by using a built-in focusing lens group. Common models such as the PicoQuantLDH-FA series laser head integrate optical path coupling and focusing functions, support multi-wavelength output, and have a pulse width as low as 70ps. It can accurately focus on the cutting path to ensure smooth cutting edges. The mobile platform 12 is based on the coordinated transmission of the ball screw and linear guide rail driven by the servo motor. The principle is to convert the rotational motion of the motor into linear displacement to realize the two-dimensional or three-dimensional position adjustment of the laser head 13. Common models such as the HIWINKK series linear module ensure positioning accuracy through high-precision guide rail and screw structure, and adapt to the cutting path adjustment needs of different sized displays. The principle of the electric telescopic rod 14 is that the motor drives the telescopic rod to extend and retract through gear or screw transmission, thereby realizing the height adjustment of the bracket 15. Common models such as Thomson electric push rods use DC motors to drive the screw structure, which has stable load capacity and telescopic accuracy. The working height of the suction cup 17 and the air blower 16 can be flexibly adjusted according to the thickness of the display screen. The air pump 19 generates a high-pressure air source by compressing air through a piston or vortex mechanism. The principle is to use a crankshaft connecting rod mechanism or impeller rotation to increase gas pressure. Common models include the AtlasCopco small vortex air pump, which outputs stable air pressure and can provide a continuous airflow for the air blower 16 to clean impurities.
[0022] Working principle: The LCD screen to be cut enters from the inlet 3 of the outer casing 1 and is conveyed by the conveyor belt 5 inside the base 6. It first passes through the pre-cleaning device at the inlet 3: the slider 9 slides along the guide rail groove 8, the spring 11 applies force to make the roller brush 4 fit against the screen, and the roller brush 4 on the rotating shaft 7 rotates under the friction force of the screen to remove dust and other small impurities from the screen surface, thus achieving pre-treatment. Then the screen is conveyed to the clamping air blowing device. The electric telescopic rod 14 drives the bracket 15 to descend, the suction cup 17 adsorbs and fixes the screen, the air pump 19 supplies air through the pipeline, the air blowing head 16 cleans the cutting area, and the laser generator 2 on the top of the outer casing 1 transmits the laser to the laser head 13 below the moving platform 12 through the optical path. The moving platform 12 adjusts the position of the laser head 13 to complete the cutting.
[0023] It should be noted that the rotation of the roller brush 4 can also be driven by an external driving force (such as a micro motor), and a protective plate matching the laser cutting is set at the bottom of the LCD screen. In addition, the driving of the laser generator 2 and the conveyor belt 5, and the control of the moving platform 12, the electric telescopic rod 14, the air pump 19, etc. can all be achieved by using the program set in the control panel, inputting relevant parameters as needed for automated control, so as to achieve orderly operation. The setting of this control method can be achieved by existing technologies, such as PLC.
[0024] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A liquid crystal display screen cutting device, comprising a housing (1), characterized in that: The outer shell (1) has an inlet (3) and an outlet (20) at its front and rear ends, respectively, and the inlet (3) and outlet (20) are arranged in a horizontal direction. A laser generator (2) is fixedly installed on the top of the outer shell (1), a mobile platform (12) is fixedly installed on the top inside the outer shell (1), and a laser head (13) is fixedly installed below the mobile platform (12). The laser head (13) and the laser generator (2) are connected to each other through an optical path. A base (6) is fixedly installed at the bottom of the outer shell (1), and a conveying assembly is fixedly installed inside the base (6). The conveying direction of the conveyor belt (5) in the conveying assembly is set from the inlet (3) to the outlet (20), and its conveying surface is located on the inner side of the bottom of the outer shell (1). A collection box (18) is fixedly installed at the bottom of the base (6), and the collection box (18) is located below the conveyor belt (5); A clamping air blowing device is fixedly installed on the base (6), and the clamping air blowing device is located inside the outer shell (1) and above the conveying path of the conveyor belt (5). A pre-cleaning device is fixedly installed at the inlet (3) of the outer shell (1). The pre-cleaning device is located above the starting end of the conveying path of the conveyor belt (5) and along the conveying direction, the pre-cleaning device and the clamping air blowing device are arranged in sequence.
2. The liquid crystal display screen cutting device according to claim 1, characterized in that: The conveyor surface of the conveyor belt (5) is provided with a hollow structure, and the hollow structure is set in correspondence with the opening of the collection box (18).
3. The liquid crystal display screen cutting device according to claim 1, characterized in that: The clamping air blowing device includes an electric telescopic rod (14), a bracket (15), an air blowing head (16), a suction cup (17), and an air pump (19). The electric telescopic rod (14) is fixedly installed on the base (6) and located on the side of the conveyor belt (5). The bracket (15) is fixedly installed on the upper end of the electric telescopic rod (14). The air blower (16) is fixedly installed on the inner side of the bracket (15) facing the conveyor belt (5) conveying path. The suction cup (17) is fixedly installed on the bracket (15) below the conveying surface of the conveyor belt (5), and the air pump (19) is fixedly installed above the rear end of the bracket (15).
4. The liquid crystal display screen cutting device according to claim 3, characterized in that: The air blower (16) is connected to the air pump (19) via a pipe, and the suction cup (17) is connected to the air pump (19) via a pipe.
5. The liquid crystal display screen cutting device according to claim 1, characterized in that: The pre-cleaning device includes a roller brush (4), a rotating shaft (7), a guide rail groove (8), a slider (9), a support rod (10), and a spring (11). The two guide rail grooves (8) are symmetrically distributed and fixedly installed on the inner walls of the outer shell (1) on both sides, and are located above the conveyor belt (5) at the inlet (3); the two sliders (9) are slidably installed in the two guide rail grooves (8), and the two ends of the rotating shaft (7) are rotatably connected to the opposite sides of the two sliders (9), and the roller brush (4) is fixedly installed on the rotating shaft (7) and its outer circumferential surface is opposite to the conveying surface of the conveyor belt (5).
6. The liquid crystal display screen cutting device according to claim 5, characterized in that: The upper end of the guide rail groove (8) is provided with a through hole, the lower end of the support rod (10) is fixedly installed on the slider (9), and the upper end passes through the through hole and can slide up and down along the through hole; The spring (11) is sleeved on the support rod (10), and the two ends of the spring (11) are respectively fixedly installed on the upper end face of the slider (9) and the inner wall of the through hole of the guide rail groove (8).
7. The liquid crystal display screen cutting device according to claim 1, characterized in that: The laser generated by the laser generator (2) can be transmitted to the laser head (13) through an optical path. The irradiation direction of the laser head (13) is perpendicular to the conveying surface of the conveyor belt (5).
8. The liquid crystal display screen cutting device according to claim 1, characterized in that: The laser head (13) is located between the clamping air blowing device and the outlet (20), and the projection area of the laser head (13) covers the conveying path of the conveyor belt (5).