High-precision liquid crystal screen laser cutting equipment

Abstract

The invention belongs to the technical field of liquid crystal screen cutting, and particularly relates to high-precision liquid crystal screen laser cutting equipment which comprises a laser head, a mounting frame is mounted on one side of the laser head, a quick-change disc is fixed to the bottom of the laser head, a lens mounting head is arranged at the bottom of the mounting frame, and an assembly groove is formed in the lens mounting head. A mounting piece is arranged in the assembling groove, a mounting lens is mounted in the center of the mounting piece, a protective lens is assembled at the top of the lens mounting head, a fixing plate is fixed to the top of the lens mounting head, and a connecting mechanism is arranged between the fixing plate and the quick-change disc. According to the invention, laser head replacement and optical path calibration can be completed synchronously, calibration operation does not need to be carried out independently after replacement, the shutdown time of equipment is greatly shortened, the production efficiency is obviously improved, dependence on experience of operators is eliminated, calibration errors caused by human factors are avoided, the calibration success rate is obviously improved, and the production cost is reduced. And the light path precision stability after the laser head is replaced can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of LCD screen cutting technology, specifically relating to a high-precision LCD screen laser cutting device. Background Technology

[0002] In the modern LCD screen production process, laser cutting technology has become a key processing method due to its advantages such as high precision, non-contact operation, and low heat-affected zone. With the continuous expansion of LCD screen production scale and the continuous improvement of product precision requirements, the efficient and stable operation of high-precision LCD screen laser cutting equipment is becoming increasingly important. In this type of equipment, the laser head is the core component, and its performance directly affects the cutting quality and efficiency. Because the internal optical components of the laser head are prone to wear and aging under long-term high-load operation, or because the laser head needs to be frequently replaced due to different processing requirements, a mechanism that allows for convenient and quick replacement of the laser head has become an important part of the equipment.

[0003] Currently, modular laser head quick-change mechanisms have achieved rapid laser head replacement to a certain extent, significantly shortening the time required for laser head disassembly and installation, reducing downtime caused by component replacement, and playing a positive role in improving production efficiency. For example, some quick-change mechanisms use specific mechanical connection structures, such as sliding grooves and locking pins, to achieve rapid insertion, removal, and fixation of the laser head, greatly simplifying the replacement process compared to traditional bolt-fastening methods. However, existing modular laser head quick-change mechanisms still reveal many technical problems that urgently need to be solved in practical applications.

[0004] The most prominent issue is the separation of mechanical connection and calibration. Existing modular laser head quick-change structures only address the rapid assembly problem at the mechanical connection level. After the laser head is replaced, there are serious deficiencies in the optical path calibration process. Optical path calibration is crucial to ensuring that the laser beam is accurately focused and operates in the best condition for LCD screen cutting. However, currently, optical path calibration must be performed every time the laser head is replaced. This process significantly extends equipment downtime and severely reduces production efficiency. In actual production, each optical path calibration may take several minutes or even longer. For large-scale, high-efficiency LCD screen production, the accumulated downtime losses are extremely considerable.

[0005] From the perspective of the calibration process, traditional calibration methods heavily rely on the experience of operators. Operators need to rely on their familiarity with laser equipment and their long-accumulated operating experience to repeatedly adjust the angles and positions of various optical components inside or outside the laser head, such as reflectors and focusing lenses. Due to the lack of precise and automated calibration methods, this process is time-consuming and is prone to errors due to human factors. For example, when manually adjusting the angle of the reflector, operators cannot guarantee that the accuracy of each adjustment is completely consistent. Even a small angle deviation may cause the transmission direction of the laser beam to change, thereby affecting the cutting accuracy. This kind of human error not only reduces the calibration success rate, but may also further increase equipment downtime and production costs due to repeated invalid calibrations.

[0006] In summary, while existing modular laser head quick-change mechanisms have made some progress in mechanical connection, problems such as the separation of mechanical connection and calibration in the optical path calibration process, the complexity of the calibration process and its reliance on manual experience, and the low calibration success rate severely restrict the overall performance and production efficiency improvement of high-precision LCD screen laser cutting equipment. Therefore, developing a new modular laser head quick-change and calibration integrated mechanism for high-precision LCD screen laser cutting equipment that can effectively solve the above problems has important practical significance and urgent market demand. Summary of the Invention

[0007] The purpose of this invention is to provide a high-precision LCD screen laser cutting equipment that can simultaneously complete laser head replacement and optical path calibration, eliminating the need for separate calibration operations after replacement. This significantly reduces equipment downtime, greatly improves production efficiency, eliminates reliance on operator experience, avoids calibration errors caused by human factors, significantly improves calibration success rate, and ensures stable optical path accuracy after laser head replacement, thus meeting the requirements for high-precision LCD screen cutting.

[0008] The specific technical solution adopted by this invention is as follows:

[0009] A high-precision LCD screen laser cutting device includes a laser head, a mounting bracket mounted on one side of the laser head, a quick-change disc fixed to the bottom of the laser head, a lens mounting head at the bottom of the mounting bracket, an assembly groove inside the lens mounting head, an assembly piece inside the assembly groove, an mounting lens mounted at the center of the assembly piece, a protective lens mounted on the top of the lens mounting head, a fixing plate fixed to the top of the lens mounting head, and a connecting mechanism between the fixing plate and the quick-change disc for locking the fixing plate and the quick-change disc together.

[0010] An adjustment assembly is installed between the laser head and the lens mounting head, the adjustment assembly being used to adjust the height of the mounting plate and the mounting lens.

[0011] The connecting mechanism includes at least two fixing rods fixed to the outside of the fixing plate. A locking block is fixed to the top of the fixing rod. A limit plate is provided on the outside of the quick-change plate. The limit plate is used to support the locking block. A mounting plate is fixed to the outside of the laser head. The bottom of the mounting plate is fixed with the same number of first springs as the locking blocks. An abutment block is fixed to the bottom of the first spring. A guide rod is fixed to the top of the abutment block and inside the first spring. The guide rod is slidably connected to the mounting plate. The abutment block is used to block the locking block. A driving structure is installed between the bottom of the mounting plate and the abutment block. The driving structure is used to drive the abutment block to move up and down.

[0012] The driving structure includes at least one electromagnet fixed to the bottom of the mounting plate, and an iron plate is fixed to the top of the abutment block. The number of iron plates is the same as the number of electromagnets and their positions correspond.

[0013] The abutting block is fixed with a soft abutting block at one end near the locking block, and the bottom of the soft abutting block is provided with a slope.

[0014] The top of the fixing plate is also fixed with an installation ring, and a retaining strip is provided on the outer side of the installation ring. The installation ring is inserted into the quick-change plate, and the retaining strip is engaged with the inner wall of the quick-change plate.

[0015] The adjustment assembly includes a grating ruler installed on the top of the lens mounting head and the inner wall of the laser head. A sealing structure is installed in the mounting groove at both the top and bottom of the mounting plate, and the sealing structure is connected to the inner wall of the mounting groove. Multiple second springs are distributed in a ring at the bottom of the mounting plate. An air guide tube is connected inside the lens mounting head. The air guide tube extends into the mounting groove and is located between the lens mounting head and the sealing structure at the lower end. A check valve is installed on the air guide tube.

[0016] The sealing structure includes an outer sealing plate and an inner sealing plate. One of the outer sealing plate and the inner sealing plate is connected to the lens mounting head, and the other is connected to the mounting piece. A second abutment is provided on the outer side of the bottom of the outer sealing plate, and a first abutment is provided on the inner side of the top of the inner sealing plate. The second abutment abuts against the inner sealing plate, and the first abutment abuts against the outer sealing plate. An installation chamber is formed between the outer sealing plate, the inner sealing plate, the first abutment, and the second abutment. A third spring is installed in the installation chamber, and sealing plates are fixed at the top and bottom of the third spring. The sealing plate at the bottom end is in contact with the second abutment and the inner sealing plate, and the sealing plate at the top end is in contact with the outer sealing plate and the first abutment.

[0017] An annular air knife is installed inside the lens mounting head and at the bottom of the protective lens. The annular air knife is used to blow air onto the mounting lens. Multiple air holes are provided inside the lens mounting head and at the bottom of the annular air knife.

[0018] The vent includes an outer vent, an inner vent, and an oblique vent;

[0019] The outer hole and the inner hole are located at both ends inside the lens mounting head. Two oblique holes are provided inside the lens mounting head and between the outer hole and the inner hole. The two oblique holes are oriented towards one end that is close to each other and are inclined upwards. The two oblique holes are interconnected. The outer hole and the inner hole are respectively interconnected with the two oblique holes.

[0020] The technical effects achieved by this invention are as follows:

[0021] This invention enables precise up-and-down adjustment of the lens by screwing the lens mounting head onto the quick-change disc and using pneumatic airflow through the air duct. This allows for simultaneous laser head replacement and optical path calibration, eliminating the need for separate calibration after replacement. This significantly reduces equipment downtime, greatly improves production efficiency, and employs a fully automated calibration process. It eliminates reliance on operator experience, avoids calibration errors caused by human factors, and significantly increases the calibration success rate. Furthermore, precise mechanical positioning and automatic optical path compensation ensure stable optical path accuracy after laser head replacement, meeting the requirements of high-precision LCD screen cutting, reducing waste caused by improper calibration, and lowering production costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure between the guide rod, the abutment block, and the fixing plate in this invention;

[0024] Figure 3 This is a schematic diagram of the structure between the locking block, the abutment block, and the guide rod in this invention;

[0025] Figure 4 This is a cross-sectional view of the lens mounting head in this invention;

[0026] Figure 5 This is a schematic diagram of the structure between the air guide tube, the mounting lens, and the annular air knife in this invention;

[0027] Figure 6 This is a schematic diagram of the structure between the air guide tube, the inclined tube, and the check valve in this invention;

[0028] Figure 7This is a schematic diagram of the structure between the outer hole, the inner hole, and the oblique hole in this invention;

[0029] Figure 8 This is a schematic diagram of the structure between the outer sealing plate and the inner sealing plate in this invention;

[0030] Figure 9 In this invention Figure 8 Enlarged view of point A in the middle.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Laser head; 2. Mounting bracket; 3. Fixing plate; 4. Quick-change disc; 5. Fixing rod; 6. Locking block; 7. Limiting plate; 8. Abutment block; 9. Electromagnet; 10. First spring; 11. Iron sheet; 12. Abutment soft block; 13. Inclined surface; 14. Guide rod; 15. Lens mounting head; 16. Mounting piece; 17. Mounting lens; 18. Main scale; 19. Reading head; 20. Protective lens; 21. Outer sealing plate; 2. Inner sealing plate; 23. Second spring; 24. Air guide tube; 25. Check valve; 26. Annular air knife; 27. Air hole; 28. Outer hole; 29. ​​Inner hole; 30. Inclined hole; 31. First abutment joint; 32. Second abutment joint; 33. Mounting chamber; 34. Third spring; 35. Sealing plate; 36. Mounting ring; 37. Locking strip; 38. Mounting plate; 39. Assembly groove; 40. Inclined tube; 41. Solenoid valve. Detailed Implementation

[0033] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0034] like Figures 1-9 As shown, a high-precision LCD screen laser cutting device includes a laser head 1, which is a cutting end mounted on a laser cutting machine. The laser head 1 contains multiple lenses, such as an upper lens, a middle lens, and a lower lens. These lenses include collimating lenses, focusing lenses, etc. A mounting bracket 2 is installed on one side of the laser head 1, and the laser head 1 is mounted on the cutting machine through the mounting bracket 2. A quick-change plate 4 is fixed to the bottom of the laser head 1. A lens mounting head 15 is provided at the bottom of the mounting bracket 2. An assembly groove 39 is provided inside the lens mounting head 15. An assembly piece 16 is provided inside the assembly groove 39. An installation lens 17 is installed at the center of the assembly piece 16. A protective lens 20 is mounted on the top of the lens mounting head 15. A fixing plate 3 is fixed to the top of the lens mounting head 15, and a connecting mechanism is provided between the fixing plate 3 and the quick-change plate 4. The connecting mechanism is used to lock the fixing plate 3 and the quick-change plate 4 together.

[0035] See attached document Figures 2-3 The connecting mechanism includes at least two fixing rods 5 fixed to the outside of the fixing plate 3. A locking block 6 is fixed to the top of the fixing rod 5. A limit plate 7 is provided on the outside of the quick-change plate 4. The limit plate 7 is used to support the locking block 6 and ensure that the locking block 6 will not fall off when assembled on the limit plate 7. An installation plate 38 is fixed to the outside of the laser head 1. The bottom of the installation plate 38 is fixed with the same number of first springs 10 as the locking blocks 6. An abutment block 8 is fixed to the bottom of the first spring 10. A guide rod 14 is fixed to the top of the abutment block 8 and located inside the first spring 10. The guide rod 14 is slidably connected to the installation plate 38. The abutment block 8 is used to block the locking block 6. A driving structure is installed between the bottom of the installation plate 38 and the abutment block 8. The driving structure is used to drive the abutment block 8 to move up and down.

[0036] When it is necessary to install the fixing plate 3 and the lens mounting head 15 onto the laser head 1, the fixing plate 3 can be aligned with the center position of the laser head 1, and the locking block 6 can be placed on the limiting plate 7. Rotating the fixing plate 3 will cause the locking block 6 to rotate on the top of the limiting plate 7 until it abuts against the end of the limiting plate 7 of the quick-change disc 4. At this time, the first spring 10 can drive the abutment block 8 to move down, thereby blocking the locking block 6 and preventing the locking block 6 from rotating off the limiting plate 7. The guide rod 14 is used to guide the... The rod 14 has two functions: First, the guide rod 14 can prevent the first spring 10 from tilting to one side, thereby avoiding a reduction in the service life of the first spring 10 due to long-term use. Second, the guide rod 14 can also prevent the first spring 10 from tilting, thereby causing the abutment block 8 to move, thus limiting the abutment effect of the abutment block 8 on the locking block 6. When it is necessary to remove the fixing plate 3 and the lens mounting head 15, the abutment block 8 can be moved upward by the drive structure to cancel the blocking effect on the locking block 6.

[0037] See attached document Figure 3 The driving structure includes at least one electromagnet 9 fixed to the bottom of the mounting plate 38, and an iron plate 11 fixed to the top of the abutment block 8. The number of iron plates 11 and the electromagnet 9 are the same and their positions correspond. When it is necessary to move the abutment block 8 upward, the electromagnet 9 can be driven to generate magnetic force and attract the iron plate 11, thereby causing the iron plate 11 to move the abutment block 8 upward, which in turn compresses the first spring 10. After the fixing plate 3 and the lens mounting head 15 are removed and replaced, the electromagnet 9 can be turned off, and the first spring 10 will drive the abutment block 8 downward again to block the locking block 6.

[0038] See attached document Figure 3A flexible abutment block 12 is fixed to one end of the abutment block 8 near the locking block 6, and the bottom of the flexible abutment block 12 is provided with a slope 13. With this arrangement, when the abutment block 8 blocks the locking block 6, the abutment block 12 can strengthen the abutment effect on the locking block 6, further preventing the locking block 6 from shifting. Moreover, with the slope 13 provided at the bottom of the flexible abutment block 12, when the abutment block 12 moves downward, the slope 13 can deform when it comes into contact with the locking block 6, thereby causing the flexible abutment block 12 to contract inward until the flexible abutment block 12 and the locking block 6 are flush, at which point the locking block 6 can be squeezed.

[0039] See attached document Figure 3 The top of the fixing plate 3 is also fixed with an installation ring 36, and a retaining strip 37 is provided on the outer side of the installation ring 36. The installation ring 36 is inserted into the quick-change plate 4, and the retaining strip 37 is engaged with the inner wall of the quick-change plate 4. With this arrangement, when the installation ring 36 on the fixing plate 3 is inserted into the quick-change plate 4, the retaining strip 37 can contact the retaining groove provided inside the quick-change plate 4. The retaining groove is L-shaped, so that the retaining strip 37 is inserted into the retaining groove and moves upward. Finally, the fixing plate 3 is rotated, which drives the retaining strip 37 to rotate in the retaining groove, thereby achieving the retaining effect of the installation ring 36 inside the quick-change plate 4. Thus, with this arrangement, the connection between the fixing plate 3 and the quick-change plate 4 is better.

[0040] An adjustment assembly is installed between the laser head 1 and the lens mounting head 15. The adjustment assembly is used to adjust the height of the mounting plate 16 and the mounting lens 17.

[0041] See attached document Figures 3-5 The adjustment assembly includes a grating ruler mounted on the top of the lens mounting head 15 and the inner wall of the laser head 1. The grating ruler includes a reading head 19 mounted on the inner wall of the quick-change disc 4 and a main scale 18 mounted on the top of the lens mounting head 15 or the mounting ring 36.

[0042] When the position of the mounting lens 17 shifts vertically, a relative displacement occurs between the main scale 18 and the reading head 19. The light source inside the reading head 19 illuminates the grating of the main scale 18, and the grating lines of the main scale 18 and the indicator grating are superimposed to form moiré fringes.

[0043] The movement of the moiré fringes is proportional to the displacement of the main scale 18. The photodetector in the reading head 19 converts the light intensity change of the moiré fringes into four sinusoidal electrical signals with a phase difference of 90°. After being subdivided by the signal processor, the signal outputs a digital displacement signal with a resolution of 0.1μm, which is then transmitted to the PLC.

[0044] After receiving the displacement signal from the grating ruler, the PLC compares it with the preset "optical path reference position" and calculates the position deviation ΔH of the mounted lens 17, where ΔH = measured position - reference position. Based on the deviation value, the PLC controls the air path of the air duct 24 to achieve fine adjustment of the height of the mounted lens 17.

[0045] Sealing structures are installed in the mounting groove 39 at the top and bottom of the mounting plate 16, and the sealing structures are connected to the inner wall of the mounting groove 39. Multiple second springs 23 are distributed in a ring at the bottom of the mounting plate 16. A gas guide tube 24 is connected inside the lens mounting head 15. The gas guide tube 24 extends into the mounting groove 39 and is located between the lens mounting head 15 and the sealing structure at the lower end. A check valve 25 is installed on the gas guide tube 24. A high-precision air pump is connected to the gas guide tube 24. When the air pump is started, it can deliver inert gas to the lens mounting head 15 through the gas guide tube 24. The inert gas setting can minimize the risk of electric sparks or other uncontrollable factors, while the check valve 25 setting prevents gas leakage from the check valve 25.

[0046] When it is necessary to adjust the mounting plate 16 and mounting lens 17 according to the detection of the grating ruler, the lens mounting head 15 can be inflated by the air duct 24. During inflation, the sealing structure at the lower end gradually becomes longer and the sealing structure at the upper end gradually becomes shorter, thereby causing the mounting plate 16 and mounting lens 17 to gradually move upward. This allows the second spring 23 to be stretched or compressed according to the up and down movement of the mounting plate 16, thereby enabling fine adjustment of the mounting lens 17. This allows the mounting lens 17 to adapt to the focusing degree of the optical path and ensures the adaptability of the lens mounting head 15.

[0047] See attached document Figure 6 An inclined tube 40 is provided on the air duct 24, and a solenoid valve 41 is installed on the inclined tube 40. When it is necessary to release the air inside the lens mounting head 15, the check valve 25 and the solenoid valve 41 can be opened at the same time. This allows the gas inside the lens mounting head 15 to be compressed by the second spring 23, so that the gas inside the lens mounting head 15 is gradually discharged. The gas can enter the air duct 24 through the check valve 25 and then enter the inclined tube 40, and then be discharged through the inclined tube 40.

[0048] See attached document Figure 5The sealing structure includes an outer sealing plate 21 and an inner sealing plate 22. One of the outer sealing plate 21 and the inner sealing plate 22 is connected to the lens mounting head 15, and the other is connected to the mounting piece 16. A second abutment 32 is provided on the outer side of the bottom of the outer sealing plate 21, and a first abutment 31 is provided on the inner side of the top of the inner sealing plate 22. The second abutment 32 abuts against the inner sealing plate 22, and the first abutment 31 abuts against the outer sealing plate 21. An installation chamber 33 is formed between the outer sealing plate 21, the inner sealing plate 22, the first abutment 31, and the second abutment 32. A third spring 34 is installed in the installation chamber 33, and sealing pieces 35 are fixed at the top and bottom of the third spring 34. The sealing piece 35 at the bottom end is in contact with the second abutment 32 and the inner sealing plate 22, and the sealing piece 35 at the top end is in contact with the outer sealing plate 21 and the first abutment 31.

[0049] When the air duct 24 inflates into the lens mounting head 15, it actually fills the space between the mounting groove 39 and the lower sealing structure. As the air is gradually inflated, the sealing structure becomes longer, which means that the outer sealing plate 21 and the inner sealing plate 22 gradually separate, thus making the outer sealing plate 21 and the inner sealing plate 22 gradually longer as a whole. By setting the sealing structure, it is avoided that the gas contains a small amount of other gases besides inert gases, such as oxygen, which may accelerate the oxidation of the mounting lens 17. In order to prevent this, the outer sealing plate 21 and the inner sealing plate 22 are used to avoid this. Therefore, in fact, this application can be designed using only the lower sealing structure, and the upper sealing structure can be omitted as appropriate. Adding the upper sealing structure can increase the stability of the vertical movement of the mounting piece 16 and the mounting lens 17, and prevent them from becoming skewed.

[0050] See appendix Figure 9 The third spring 34 installed in the mounting chamber 33 can apply elasticity to the two sealing plates 35 in a direction away from each other, so that the two sealing plates 35 can be tightly attached to the first abutment 31 and the second abutment 32 respectively. The sealing plates 35 can be deformed to a certain extent by the compression of the third spring 34, so that the sealing plates 35 can better block the gaps between the first abutment 31 and the outer sealing plate 21 and the second abutment 32 and the inner sealing plate 22, ensuring their sealing performance and preventing gas leakage to the position of the mounting lens 17.

[0051] See appendix Figure 4An annular air knife 26 is installed inside the lens mounting head 15 and at the bottom of the protective lens 20. The annular air knife 26 is used to blow air onto the mounting lens 17. Multiple air holes 27 are provided inside the lens mounting head 15 and at the bottom of the annular air knife 26. Through the setting of the annular air knife 26, the annular air knife 26 blows out annular gas, which can clean the dust and other objects on the mounting lens 17. The dust will be blown out through the air holes 27.

[0052] The vent 27 includes an outer vent 28, an inner vent 29, and an oblique vent 30;

[0053] The outer hole 28 and the inner hole 29 are located at both ends inside the lens mounting head 15. Two oblique holes 30 are provided inside the lens mounting head 15 and between the outer hole 28 and the inner hole 29. The two oblique holes 30 are oriented towards the end that is close to each other and are inclined upwards. The two oblique holes 30 are interconnected, and the outer hole 28 and the inner hole 29 are respectively connected to the two oblique holes 30. With this arrangement, the air blown out by the annular air knife 26 and the dust blown away will be blown out through the inner hole 29, the oblique holes 30 and the outer hole 28. The dust from the outside is difficult to reach the inner oblique hole 30 due to the oblique setting of the oblique holes 30. Thus, it is difficult for the dust from the outside to enter the lens mounting head 15 through the inner hole 29. The air blown out by the annular air knife 26 can easily blow away the dust blocking the outer hole 28 and the oblique holes 30, thereby cleaning the newly installed mounting lens 17 and ensuring the laser transmission effect.

[0054] The general installation of the new lens is as follows: Align the mounting ring 36 on the top of the new lens mounting head 15 with the center hole of the quick-change disc 4, ensure that the locking strip 37 is embedded in the vertical section of the L-shaped groove, and place the three locking blocks 6 in the positioning grooves of the limiting plate 7 respectively.

[0055] Rotate the lens mounting head 15 clockwise by about 30° until the locking block 6 abuts against the end stop of the limiting plate 7. At this time, the retaining strip 37 of the mounting ring 36 enters the horizontal section of the L-shaped groove, completing the initial mechanical positioning. Then, the PLC cuts off the power to the electromagnet 9, the first spring 10 releases its elastic force, and drives the abutting block 8 to move down. The abutting soft block 12 fits against the locking block 6 through the bottom inclined surface 13. Finally, a pre-tightening force is applied to achieve axial limiting of the locking block 6 and prevent loosening.

[0056] Activate the annular air knife 26 and continue blowing for 10 seconds to clean the lens mounting head 15.

[0057] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A high-precision LCD screen laser cutting device, comprising a laser head (1), characterized in that, A mounting bracket (2) is installed on one side of the laser head (1), a quick-change disc (4) is fixed at the bottom of the laser head (1), a lens mounting head (15) is provided at the bottom of the mounting bracket (2), an assembly groove (39) is provided inside the lens mounting head (15), an mounting piece (16) is provided inside the assembly groove (39), an mounting lens (17) is installed at the center of the mounting piece (16), a protective lens (20) is mounted on the top of the lens mounting head (15), a fixing plate (3) is fixed on the top of the lens mounting head (15), and a connecting mechanism is provided between the fixing plate (3) and the quick-change disc (4), the connecting mechanism is used to lock the fixing plate (3) and the quick-change disc (4) together; An adjustment assembly is installed between the laser head (1) and the lens mounting head (15), the adjustment assembly being used to adjust the height of the mounting plate (16) and the mounting lens (17).

2. The high-precision LCD screen laser cutting equipment according to claim 1, characterized in that: The connecting mechanism includes at least two fixing rods (5) fixed to the outside of the fixing plate (3). A locking block (6) is fixed to the top of the fixing rod (5). A limit plate (7) is provided on the outside of the quick-change plate (4). The limit plate (7) is used to support the locking block (6). An installation plate (38) is fixed to the outside of the laser head (1). A first spring (10) with the same number as the locking block (6) is fixed to the bottom of the installation plate (38). An abutment block (8) is fixed to the bottom of the first spring (10). A guide rod (14) is fixed to the top of the abutment block (8) and inside the first spring (10). The guide rod (14) is slidably connected to the installation plate (38). The abutment block (8) is used to block the locking block (6). A driving structure is installed between the bottom of the installation plate (38) and the abutment block (8). The driving structure is used to drive the abutment block (8) to move up and down.

3. The high-precision LCD screen laser cutting equipment according to claim 2, characterized in that: The driving structure includes at least one electromagnet (9) fixed to the bottom of the mounting plate (38), and an iron plate (11) is fixed to the top of the abutment block (8), and the number of iron plates (11) is the same as that of the electromagnet (9) and their positions correspond.

4. The high-precision LCD screen laser cutting equipment according to claim 3, characterized in that: The abutting block (8) has a soft abutting block (12) fixed at one end near the locking block (6), and the bottom of the soft abutting block (12) is provided with a slope (13).

5. A high-precision LCD screen laser cutting device according to claim 4, characterized in that: The top of the fixing plate (3) is also fixed with an installation ring (36), and a retaining strip (37) is provided on the outside of the installation ring (36). The installation ring (36) is inserted into the quick-change plate (4), and the retaining strip (37) is engaged with the inner wall of the quick-change plate (4).

6. The high-precision LCD screen laser cutting equipment according to claim 1, characterized in that: The adjustment assembly includes a grating ruler installed on the top of the lens mounting head (15) and the inner wall of the laser head (1). A sealing structure is installed in the mounting groove (39) at the top and bottom of the mounting plate (16), and the sealing structure is connected to the inner wall of the mounting groove (39). A plurality of second springs (23) are distributed in a ring at the bottom of the mounting plate (16). An air guide tube (24) is connected inside the lens mounting head (15). The air guide tube (24) extends into the mounting groove (39) and is located between the lens mounting head (15) and the sealing structure at the lower end. A check valve (25) is installed on the air guide tube (24).

7. A high-precision LCD screen laser cutting device according to claim 6, characterized in that: The sealing structure includes an outer sealing plate (21) and an inner sealing plate (22). One of the outer sealing plate (21) and the inner sealing plate (22) is connected to the lens mounting head (15), and the other is connected to the mounting piece (16). A second abutment (32) is provided on the outer side of the bottom of the outer sealing plate (21), and a first abutment (31) is provided on the inner side of the top of the inner sealing plate (22). The second abutment (32) abuts against the inner sealing plate (22), and the first abutment (31) abuts against the outer sealing plate (21). 1) Abutting, an installation chamber (33) is formed between the outer sealing plate (21), the inner sealing plate (22), the first abutting joint (31) and the second abutting joint (32). A third spring (34) is installed in the installation chamber (33), and sealing plates (35) are fixed at the top and bottom of the third spring (34). The sealing plate (35) at the bottom end is in contact with the second abutting joint (32) and the inner sealing plate (22), and the sealing plate (35) at the top end is in contact with the outer sealing plate (21) and the first abutting joint (31).

8. The high-precision LCD screen laser cutting equipment according to claim 1, characterized in that: An annular air knife (26) is installed inside the lens mounting head (15) and at the bottom of the protective lens (20). The annular air knife (26) is used to blow air onto the mounting lens (17). Multiple air holes (27) are provided inside the lens mounting head (15) and at the bottom of the annular air knife (26).

9. A high-precision LCD screen laser cutting device according to claim 8, characterized in that: The vent (27) includes an outer vent (28), an inner vent (29), and an oblique vent (30); The outer hole (28) and the inner hole (29) are located at both ends inside the lens mounting head (15). Two oblique holes (30) are provided inside the lens mounting head (15) and between the outer hole (28) and the inner hole (29). The two oblique holes (30) are oriented towards one end that is close to each other and are inclined upward. The two oblique holes (30) are interconnected. The outer hole (28) and the inner hole (29) are respectively interconnected with the two oblique holes (30).

Images