Mechanism for automatically adjusting the size of a repair spot

Abstract

The application relates to a mechanism for automatically adjusting a repair light spot size, which comprises, from top to bottom, an X-axis light path adjusting mechanism and a Y-axis light path adjusting mechanism, an upper bottom plate is arranged between the X-axis light path adjusting mechanism and the Y-axis light path adjusting mechanism, and a lower bottom plate is arranged at the bottom of the Y-axis light path adjusting mechanism. The application is suitable for OLED screen light spot repair, can automatically adjust the thickness of a light beam in a servo driving mode, can meet the requirement of quickly repairing light spots with different sizes, and greatly reduces the workload and improves the repair efficiency.

Description

Technical Field

[0001] This invention relates to the field of OLED screen processing technology, and in particular to a mechanism for automatically adjusting and repairing the size of light spots. Background Technology

[0002] The development of laser technology has become an important symbol of contemporary scientific and technological development and a crucial pillar of optoelectronic technology in the modern information society.

[0003] Scientists use the energy of light or electric current to bombard certain crystals or atoms in a tube, causing the electrons of the atoms to reach a high-energy excited state. When these electrons return to a calm, low-energy state, the atoms emit photons to release excess energy. Then, these emitted photons bombard other atoms, exciting more atoms to produce photons, triggering a series of chain reactions, all moving in the same direction, forming strong and concentrated light directed in a certain direction.

[0004] Lasers are widely used because of their properties. A laser is almost a monochromatic light wave with an extremely narrow frequency range, and it can concentrate high energy within a small direction. Therefore, a focused laser beam can be used to drill holes in various materials. These properties of lasers are not due to their unique light energy, but rather their extremely high power density, which is why lasers are so widely used.

[0005] This equipment is primarily used for repairing defects such as bright spots on flexible panels. It automatically locates and repairs these defects using an AOI system and employs a laser. The equipment features a simple and convenient design, utilizes advanced AOI technology and an operating system, and boasts excellent dynamic performance. The selected control system's actuators are highly precise, reliable, and have a fast response time. The equipment is easy to use, operate, and maintain, has a compact structure, and operates stably and reliably.

[0006] Liquid crystal displays, including LCD and LED displays, produce images by stimulating liquid crystal molecules with electric current, creating dots, lines, and surfaces that work in conjunction with backlighting. Compared to traditional cathode ray tube displays, they are larger, produce softer images, are flicker-free, and reduce eye strain. With technological advancements, the emergence of laser-repairable LCD screens has greatly satisfied user needs.

[0007] Equipment Functions: The multi-band (visible light, infrared, ultraviolet) laser repair system is primarily used to melt and break adhesions generated during the manufacturing process without affecting the substrate performance. It can also be used to weld non-conductive materials between upper and lower layers. It is mainly used for the repair of TFTs, FPDs (LCDs, PDPs, OECs), semiconductor devices, and PCBs. The laser system of the multi-band (visible light, infrared, ultraviolet) laser repair system has a three-band pulsed laser output function, capable of repairing various materials. It also features a wiring system capable of repairing open circuits in devices.

[0008] Laser repair machines for LCD screens represent high-end repair technology and are advanced equipment in the LCD screen repair industry. Besides repairing loose TAB solder joints and burnt areas, laser repair machines can also repair other issues such as broken ITO lines, short lines, bright lines, half-line lines, dotted lines, coarse mesh, and multiple lines.

[0009] Laser repair spots vary in size. In practice, because the beam thickness is fixed without external interference, when repairing spots of varying sizes, the beam can only be provided with the smaller spot as a reference, resulting in a large workload and low repair efficiency.

[0010] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a mechanism that automatically adjusts and repairs the size of the light spot, making it more valuable for industrial applications. Summary of the Invention

[0011] To solve the above-mentioned technical problems, the purpose of this invention is to provide a mechanism for automatically adjusting and repairing the size of the light spot.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] The mechanism for automatically adjusting and repairing the light spot size includes, from top to bottom, an X-axis optical path adjustment mechanism and a Y-axis optical path adjustment mechanism. An upper base plate is positioned between the X-axis and Y-axis optical path adjustment mechanisms, and a lower base plate is positioned at the bottom of the Y-axis optical path adjustment mechanism. The X-axis optical path adjustment mechanism includes a first servo motor, a first nut seat, a first optical path baffle, and a second optical path baffle. The first servo motor is mounted on the upper base plate along the negative X-axis direction via a motor mount. The drive end of the first servo motor is connected to the first nut seat along the positive X-axis direction. The upper base plate along the positive X-axis direction has a first optical path baffle and a second optical path baffle sequentially arranged along the positive X-axis direction. The first and second optical path baffles are slidably connected to the lower upper base plate along the X-axis direction, and a lower base plate is positioned between the first and second optical path baffles. An X-axis guide drive block assembly is provided, with a first nut seat in contact with the guide drive block assembly on one side along the positive X-axis direction. The Y-axis optical path adjustment mechanism includes a second servo motor, a second nut seat, a third optical path baffle, and a fourth optical path baffle. The second servo motor is mounted on the upper base plate on one side along the negative X-axis direction via a motor mount. The drive end of the second servo motor is driven and connected to the second nut seat on one side along the positive X-axis direction. The third and fourth optical path baffles are sequentially arranged on the lower base plate along one side along the positive X-axis direction and along the negative Y-axis direction. The third and fourth optical path baffles are slidably connected to the lower base plate at the bottom along the Y-axis direction. A Y-axis guide drive block assembly is provided at the bottom of the upper base plate between the first and second optical path baffles, with the second nut seat in contact with the Y-axis guide drive block assembly on one side along the positive X-axis direction.

[0014] As a further improvement of the present invention, the X-axis guide drive block assembly includes a first top block and a first push wheel. The first top block is mounted on the upper base plate between the first optical path baffle and the second optical path baffle via a rotating shaft. The first push wheel is provided on the side of the first top block facing the light beam, and the first nut seat is provided in contact with the first push wheel on one side along the positive direction of the X-axis.

[0015] As a further improvement of the present invention, the Y-axis guide drive block assembly includes a second top block, a second push wheel and a connecting arm. The second top block is mounted on the bottom of the upper base plate between the third optical path baffle and the fourth optical path baffle via a rotating shaft. The second top block is connected to the lower second push wheel via the connecting arm. The second nut seat is arranged in contact with the second push wheel on one side along the positive direction of the X-axis.

[0016] As a further improvement of the present invention, a first pin is provided on one side of the first optical path baffle along the negative X-axis and on one side of the second optical path baffle along the positive X-axis, and a first spring is provided between the two first pins. The first optical path baffle and the second optical path baffle are connected together by the first spring. A second pin is provided on one side of the third optical path baffle along the positive Y-axis and on one side of the fourth optical path baffle along the negative Y-axis, and a second spring is provided between the two second pins. The third optical path baffle and the fourth optical path baffle are connected together by the second spring.

[0017] As a further improvement of the present invention, the first nut seat moves along the X-axis direction on the upper base plate via the first guide block, and the second nut seat moves along the X-axis direction on the lower base plate via the second guide block.

[0018] As a further improvement of the present invention, the drive end of the first servo motor is sequentially connected to the first nut seat on one side along the positive X-axis via a coupling and a lead screw, and the drive end of the second servo motor is sequentially connected to the second nut seat on one side along the positive X-axis via a coupling and a lead screw.

[0019] As a further improvement of the present invention, a first sensing plate is provided on one side of the first nut seat along the negative direction of the X-axis, and a first sensor adapted to the first sensing plate is provided on the upper base plate. A second sensing plate is provided on one side of the second nut seat along the negative direction of the X-axis, and a second sensor adapted to the second sensing plate is provided at the bottom of the upper base plate.

[0020] As a further improvement of the present invention, a first blade is provided on the inner side of the first optical path baffle and the second optical path baffle, and a second blade is provided on the inner side of the third optical path baffle and the fourth optical path baffle.

[0021] As a further improvement of the present invention, an air blowing block is provided on the lower base plate between the first optical path baffle, the second optical path baffle, the third optical path baffle and the fourth optical path baffle.

[0022] As a further improvement of the present invention, a cover is provided on the outside of the X-axis optical path adjustment mechanism and the Y-axis optical path adjustment mechanism, and a beam hole is provided on the cover for the light beam to pass through.

[0023] By means of the above-described solution, the present invention has at least the following advantages:

[0024] This invention is applicable to the repair of light spots on OLED screens. By using servo drive, the beam thickness can be automatically adjusted to quickly meet the needs of repairing light spots of different sizes, greatly reducing workload and improving repair efficiency.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the mechanism for automatically adjusting and repairing the size of the light spot according to the present invention;

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure after removing the cover;

[0029] Figure 3 yes Figure 2 A schematic diagram of the structure after removing the X-axis optical path adjustment mechanism at the top;

[0030] Figure 4 yes Figure 3 A schematic diagram of the structure on the other side after removing the fourth optical path baffle.

[0031] The meanings of the labels in the figures are as follows.

[0032] 1 First servo motor 2 Second servo motor 3 casing 4 beam 5 Beam aperture 6 motor base 7 upper base plate 8 Bottom plate 9 coupling 10 Lead screw 11 First nut seat 12 First sensor 13 First sensor 14 Spacer column 15 First guide block 16 First optical path baffle 17 First top block 18 First push wheel 19 Second optical path baffle 20 First blade 21 First spring 22 First pin 23 Second sensor 24 Second nut seat 25 Third optical path baffle 26 Second guide block 27 Second blade 28 Fourth optical path baffle 29 Second top block 30 Second pusher wheel 31 Second spring 32 Second pin 33 Inflatable blocks 34 Connecting arm Detailed Implementation

[0033] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] Example

[0036] like Figures 1-4 As shown,

[0037] The mechanism for automatically adjusting and repairing the light spot size includes, from top to bottom, an X-axis optical path adjustment mechanism and a Y-axis optical path adjustment mechanism. An upper base plate 7 is positioned between the X-axis and Y-axis optical path adjustment mechanisms, and a lower base plate 8 is positioned at the bottom of the Y-axis optical path adjustment mechanism. The X-axis optical path adjustment mechanism includes a first servo motor 1, a first nut seat 11, a first optical path baffle 16, and a second optical path baffle 19. The first servo motor 1 is mounted on the upper base plate 7 along the negative X-axis direction via a motor mount 6. The drive end of the first servo motor 1 is connected to the first nut seat 11 along the positive X-axis direction. The upper base plate 7 along the positive X-axis direction has the first optical path baffle 16 and the second optical path baffle 19 sequentially arranged. The first optical path baffle 16 and the second optical path baffle 19 are slidably connected to the lower upper base plate 7 along the X-axis direction, and a lower base plate 8 is provided on the upper base plate 7 between the first optical path baffle 16 and the second optical path baffle 19. The device includes an X-axis guide drive block assembly, with a first nut seat 11 in contact with the guide drive block assembly on one side along the positive X-axis direction. The Y-axis optical path adjustment mechanism includes a second servo motor 2, a second nut seat 24, a third optical path baffle 25, and a fourth optical path baffle 28. The second servo motor 2 is mounted on the upper base plate 7 on one side along the negative X-axis direction via a motor seat 6. The drive end of the second servo motor 2 is connected to the second nut seat 24 on one side along the positive X-axis direction. The lower base plate 8 has the third optical path baffle 25 and the fourth optical path baffle 28 sequentially arranged on one side along the positive X-axis direction and along the negative Y-axis direction. The third optical path baffle 25 and the fourth optical path baffle 28 are slidably connected to the lower base plate 8 at the bottom along the Y-axis direction. The bottom of the upper base plate 7 between the first optical path baffle 16 and the second optical path baffle 19 has a Y-axis guide drive block assembly, with the second nut seat 24 in contact with the Y-axis guide drive block assembly on one side along the positive X-axis direction.

[0038] Among them, a spacer column 14 is provided between the upper base plate 7 and the lower base plate 8 to provide support.

[0039] Preferably, the X-axis guide drive block assembly includes a first top block 17 and a first pusher 18. The first top block 17 is mounted on the upper base plate 7 between the first optical path baffle 16 and the second optical path baffle 19 via a rotating shaft. The first pusher 18 is provided on the side of the first top block 17 facing the beam 4, and the first nut seat 11 is in contact with the first pusher 18 on one side along the positive direction of the X-axis.

[0040] Preferably, the Y-axis guide drive block assembly includes a second top block 29, a second pusher 30, and a connecting arm 34. The second top block 29 is mounted on the bottom of the upper base plate 7 between the third optical path baffle 25 and the fourth optical path baffle 28 via a rotating shaft. The second top block 29 is connected to the lower second pusher 30 via the connecting arm 34. The second nut seat 24 is arranged in contact with the second pusher 30 on one side along the positive X-axis direction. The second nut seat 24 has a rectangular frame structure along the positive X-axis direction, and its rectangular frame is arranged in contact with the second pusher 30 on both the negative X-axis direction and the positive X-axis direction side.

[0041] Preferably, a first pin 22 is provided on one side of the first optical path baffle 16 along the negative X-axis and on one side of the second optical path baffle 19 along the positive X-axis, respectively. A first spring 21 is provided between the two first pins 22, and the first optical path baffle 16 and the second optical path baffle 19 are connected together by the first spring 21. A second pin 32 is provided on one side of the third optical path baffle 25 along the positive Y-axis and on one side of the fourth optical path baffle 28 along the negative Y-axis, respectively. A second spring 31 is provided between the two second pins 32, and the third optical path baffle 25 and the fourth optical path baffle 28 are connected together by the second spring 31.

[0042] Preferably, the first nut seat 11 moves along the X-axis direction on the upper base plate 7 via the first guide block 15, and the second nut seat 24 moves along the X-axis direction on the lower base plate 8 via the second guide block 26.

[0043] Preferably, the drive end of the first servo motor 1 is sequentially connected to the first nut seat 11 on one side along the positive X-axis via the coupling 9 and the lead screw 10, and the drive end of the second servo motor 2 is sequentially connected to the second nut seat 24 on one side along the positive X-axis via the coupling 9 and the lead screw 10.

[0044] Preferably, a first sensing plate 13 is provided on one side of the first nut seat 11 along the negative X-axis, a first sensor 12 adapted to the first sensing plate 13 is provided on the upper base plate 7, a second sensing plate 23 is provided on one side of the second nut seat 24 along the negative X-axis, and a second sensor adapted to the second sensing plate 23 is provided at the bottom of the upper base plate 7 (not shown in the figure).

[0045] Preferably, the inner sides of the first optical path baffle 16 and the second optical path baffle 19 are respectively provided with first blades 20, and the inner sides of the third optical path baffle 25 and the fourth optical path baffle 28 are respectively provided with second blades 27.

[0046] Preferably, an air blowing block 33 is provided on the lower base plate 8 between the first optical path baffle 16, the second optical path baffle 19, the third optical path baffle 25 and the fourth optical path baffle 28.

[0047] Preferably, a cover 3 is provided on the outside of the X-axis optical path adjustment mechanism and the Y-axis optical path adjustment mechanism, and a beam hole 5 is provided on the cover 3 for the beam 4 to pass through.

[0048] When the mechanism for automatically adjusting and repairing the size of the light spot of this invention is working, two servo motors drive the lead screws respectively, converting the rotational motion into linear motion; two sets of linkage mechanisms convert the linear motion of the lead screw nut into the linear movement of the optical path blocking block; two sets of sensors are used to sense the position of the blocking block and feed it back to the servo motor driver to form a closed loop, thereby achieving the purpose of precisely adjusting the size of the repair light spot.

[0049] A brief description of the working process of the mechanism for automatically adjusting and repairing the light spot size in this invention:

[0050] Throughout the entire process, light is emitted from the optical device, passes through a reflector, enters the adjustment mechanism of the invention to adjust the size of the beam, and is then reflected into the repair galvanometer to achieve the effect of repairing spots on the OLED screen. A driver sends a signal to rotate either the first servo motor 1 or the second servo motor 2. The rotation of the first servo motor 1 or the second servo motor 2 drives the lead screw 10 to rotate via the coupling 9. The rotation of the lead screw 10 drives the lead screw nut to move back and forth. The lead screw nut drives the first nut seat 11 or the second nut seat 24 to move back and forth, and pushes the X-axis guide drive block assembly or the Y-axis guide drive block assembly. The X-axis guide drive block assembly or the Y-axis guide drive block assembly drives the rotating block below to open the first optical path baffle 16, the second optical path baffle 19, the third optical path baffle 25, and the fourth optical path baffle 28, forming a gap. The two layers of connecting rod assemblies are superimposed in the X and Y directions to form an adjustable square hole, which is the mechanism for adjusting the size of the repair spot. The sensing element of the first nut seat 11 or the second nut seat 24 establishes a zero-point coordinate system for the size of the light spot by moving back and forth from the origin through the sensor, thereby realizing automatic control through the driver, which is the mechanism for automatically adjusting and repairing the size of the light spot.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly referring to the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A mechanism for automatically adjusting the size of the repair light spot, characterized in that, The optical path adjustment mechanism consists of an X-axis optical path adjustment mechanism and a Y-axis optical path adjustment mechanism, arranged from top to bottom. An upper base plate (7) is provided between the X-axis and Y-axis optical path adjustment mechanisms. A lower base plate (8) is provided at the bottom of the Y-axis optical path adjustment mechanism. The X-axis optical path adjustment mechanism includes a first servo motor (1), a first nut seat (11), a first optical path baffle (16), and a second optical path baffle (19). The first servo motor (1) is mounted on one side of the upper base plate (7) along the negative X-axis direction via a motor mount (6). The drive end of the servo motor (1) is driven and connected to the first nut seat (11) on one side along the positive X-axis. The upper base plate (7) is provided with a first optical path baffle (16) and a second optical path baffle (19) in sequence along the positive X-axis. The first optical path baffle (16) and the second optical path baffle (19) are slidably connected to the bottom upper base plate (7) along the X-axis. An X-axis guide drive block is provided on the upper base plate (7) between the first optical path baffle (16) and the second optical path baffle (19). The first nut seat (11) is disposed in contact with the X-axis guide drive block assembly on one side along the positive X-axis direction; the Y-axis optical path adjustment mechanism includes a second servo motor (2), a second nut seat (24), a third optical path baffle (25) and a fourth optical path baffle (28). The second servo motor (2) is mounted on the upper base plate (7) on one side along the negative X-axis direction via a motor mount (6). The drive end of the second servo motor (2) is connected to the second nut seat (24) on one side along the positive X-axis direction. The lower base plate... (8) A third optical path baffle (25) and a fourth optical path baffle (28) are sequentially arranged along the positive direction of the X-axis and along the negative direction of the Y-axis. The third optical path baffle (25) and the fourth optical path baffle (28) are slidably connected to the bottom plate (8) along the Y-axis direction. A Y-axis guide drive block assembly is arranged at the bottom of the upper plate (7) between the first optical path baffle (16) and the second optical path baffle (19). The second nut seat (24) is in contact with the Y-axis guide drive block assembly along the positive direction of the X-axis. The X-axis guide drive block assembly includes a first top block (17) and a first pusher (18). The first top block (17) is mounted on the upper base plate (7) between the first optical path baffle (16) and the second optical path baffle (19) via a rotating shaft. The first pusher (18) is provided on the side of the first top block (17) facing the beam (4). The first nut seat (11) is in contact with the first pusher (18) on one side along the positive direction of the X-axis. The Y-axis guide drive block assembly includes a second top block (29), a second push wheel (30), and a connecting arm (34). The second top block (29) is mounted on the bottom of the upper base plate (7) between the third optical path baffle (25) and the fourth optical path baffle (28) via a rotating shaft. The second top block (29) is connected to the lower second push wheel (30) via the connecting arm (34). The second nut seat (24) is positioned in contact with the second push wheel (30) on one side along the positive direction of the X-axis.

2. The mechanism for automatically adjusting the size of the repair spot as described in claim 1, characterized in that, First pins (22) are respectively provided on one side of the first optical path baffle (16) along the negative direction of the X-axis and on one side of the second optical path baffle (19) along the positive direction of the X-axis. A first spring (21) is provided between the two first pins (22). The first optical path baffle (16) and the second optical path baffle (19) are connected together by the first spring (21). Second pins (32) are respectively provided on one side of the third optical path baffle (25) along the positive direction of the Y-axis and on one side of the fourth optical path baffle (28) along the negative direction of the Y-axis. A second spring (31) is provided between the two second pins (32). The third optical path baffle (25) and the fourth optical path baffle (28) are connected together by the second spring (31).

3. The mechanism for automatically adjusting the size of the repair spot as described in claim 1, characterized in that, The first nut seat (11) moves along the X-axis direction on the upper base plate (7) via the first guide block (15), and the second nut seat (24) moves along the X-axis direction on the lower base plate (8) via the second guide block (26).

4. The mechanism for automatically adjusting the size of the repair spot as described in claim 1, characterized in that, The drive end of the first servo motor (1) is connected to the first nut seat (11) on one side along the positive direction of the X-axis via a coupling (9) and a lead screw (10). The drive end of the second servo motor (2) is connected to the second nut seat (24) on one side along the positive direction of the X-axis via a coupling (9) and a lead screw (10).

5. The mechanism for automatically adjusting the size of the repair spot as described in claim 1, characterized in that, The first nut seat (11) is provided with a first sensing plate (13) on one side along the negative X-axis, and the upper base plate (7) is provided with a first sensor (12) adapted to the first sensing plate (13). The second nut seat (24) is provided with a second sensing plate (23) on one side along the negative X-axis, and the bottom of the upper base plate (7) is provided with a second sensor adapted to the second sensing plate (23).

6. The mechanism for automatically adjusting the size of the repair spot as described in claim 1 or 2, characterized in that, The inner sides of the first optical path baffle (16) and the second optical path baffle (19) are respectively provided with first blades (20), and the inner sides of the third optical path baffle (25) and the fourth optical path baffle (28) are respectively provided with second blades (27).

7. The mechanism for automatically adjusting the size of the repair spot as described in claim 1 or 2, characterized in that, An air-blowing block (33) is provided on the bottom plate (8) between the first optical path baffle (16), the second optical path baffle (19), the third optical path baffle (25) and the fourth optical path baffle (28).

8. The mechanism for automatically adjusting the size of the repair spot as described in claim 1, characterized in that, The outer side of the X-axis optical path adjustment mechanism and the Y-axis optical path adjustment mechanism is provided with a cover (3), and the cover (3) is provided with a beam hole (5) for the beam (4) to pass through.

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