Lens protection device and laser processing equipment

Abstract

The utility model relates to a lens protection device and laser processing equipment, the lens protection device comprises a cylindrical blowing assembly and a dust extraction piece, and the dust extraction piece is in butt joint with the lower end of the blowing assembly; an air inlet is formed in the outer wall of the air blowing assembly, an air outlet is formed in the inner wall of the air blowing assembly, the air blowing assembly is provided with an air blowing channel, the air inlet is communicated with the air outlet through the air blowing channel, and the air outlet is in a ring shape or a plurality of air outlets are arranged in a ring shape; a dust extraction opening is formed in the inner wall of the dust extraction piece, the dust extraction opening is in a ring shape or a plurality of dust extraction openings are arranged in a ring shape, and the dust extraction openings are connected with a negative pressure device. According to the lens protection device provided by the invention, an annular air curtain can be formed below the lens assembly through the air blowing assembly and is used for isolating dust from the lens assembly. The dust suction part is in butt joint with the bottom of the air blowing assembly, dust blocked by the air curtain can be sucked and collected, the dust concentration of the area below the lens assembly is reduced, the number of dust particles is reduced from the source, and the situation that the laser machining precision and the yield are affected due to dust adsorption is avoided.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a lens protection device and laser processing equipment. Background Art

[0002] With the development of intelligent manufacturing technology, the degree of automation in all walks of life is constantly improving. Taking laser processing technology as an example, the laser processing system usually includes a laser and a supporting optical path system. The optical path system includes optical components such as galvanometers and field lenses, which are used to realize the transmission of laser light, thereby realizing laser processing operations such as welding, cutting, drilling, and coding of workpieces through laser.

[0003] During processing operations, due to the influence of electrostatic effects and other factors, dust and other impurities in the production area are easily adsorbed on the field mirror, which in turn affects the laser processing operation and reduces the laser processing accuracy and yield. Utility Model Content

[0004] The present application provides a lens protection device and laser processing equipment to solve the technical problem in the prior art that dust and other impurities are easily adsorbed on the lens, affecting the laser processing accuracy and yield.

[0005] In the first aspect, the present application provides a lens protection device, comprising a cylindrical blowing assembly and a dust extraction piece, the dust extraction piece is connected to the lower end of the blowing assembly; the outer wall of the blowing assembly is provided with an air inlet, the inner wall of the blowing assembly is provided with an air outlet, the blowing assembly is provided with a blowing channel, the air inlet is connected with the air outlet through the blowing channel, the air outlet is annular or multiple air outlets are arranged in a ring shape; the inner wall of the dust extraction piece is provided with a dust extraction port, the dust extraction port is annular or multiple dust extraction ports are arranged in a ring shape, and the dust extraction port is connected to a negative pressure device.

[0006] Optionally, the blowing assembly includes an inner cylinder and an outer cylinder sleeved on the inner cylinder, the air inlet is arranged on the outer cylinder, a blowing channel is formed between the outer cylinder and the inner cylinder, the air outlet end of the blowing channel is configured as an air outlet, and the air outlet direction of the air outlet is inclined to the center line of the inner cylinder and downward.

[0007] Optionally, a first air chamber is formed in a depression on the outer wall of the inner tube, the first air chamber is opposite to the air inlet, and the first air chamber is connected to the air blowing channel.

[0008] Optionally, a second air chamber is formed in a depression on the outer wall of the inner tube, and the second air chamber is connected between the first air chamber and the blowing channel, and the channel sizes of the first air chamber, the second air chamber and the blowing channel decrease in sequence.

[0009] Optionally, the outer tube and the inner tube are detachably connected; the inner wall of the outer tube is provided with a lens connecting portion and an inner tube connecting portion, and the lens connecting portion, the inner tube connecting portion and the first air chamber are arranged in sequence along the axial direction of the outer tube.

[0010] Optionally, a first dust extraction channel is formed inside the barrel wall of the dust extraction member, and the dust extraction port is connected to the negative pressure device through the first dust extraction channel.

[0011] Optionally, the lens protection device further includes a dust extraction base connected to the outside of the dust extraction member. A second dust extraction channel is provided inside the dust extraction base, and the dust extraction port is connected to the negative pressure device through the first dust extraction channel, the second dust extraction channel.

[0012] Optionally, the dust extraction member and the dust extraction base are of an integral structure.

[0013] Optionally, the lens protection device further includes a fixing base connected to the dust extraction base.

[0014] In a second aspect, the present application provides a laser processing device, including the lens protection device provided in the first aspect of the present application, and further including a lens assembly, and a blowing assembly is connected to the bottom of the lens assembly.

[0015] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0016] For the lens protection device provided by the embodiment of the present application, by providing an annular air outlet on the inner wall of the blowing assembly, or arranging a plurality of air outlets in an annular displacement, an annular air curtain can be formed below the lens assembly to isolate dust and the lens assembly, and prevent impurities such as dust from passing through the air curtain and adsorbing on the field lens at the bottom of the lens assembly, affecting the laser processing accuracy and yield. The dust extraction member is docked at the bottom of the blowing assembly, and the dust and impurities below the blowing assembly are sucked through the annular dust extraction port or a plurality of annularly arranged dust extraction ports, so that the dust blocked by the air curtain can be sucked and collected, reducing the dust concentration in the area below the lens assembly, reducing the number of dust particles from the source, and further preventing the dust from moving randomly below the field lens and then crossing the air curtain and adsorbing on the field lens. Description of the Drawings

[0017] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated. The drawings in the figures do not constitute a scale limitation.

[0020] Figure 1 Structural schematic diagram of the lens protection device provided by the embodiment of the present application;

[0021] Figure 2 Exploded view of the lens protection device provided by the embodiment of the present application;

[0022] Figure 3 Partial cross-sectional view of the lens protection device provided by the embodiment of the present application;

[0023] Figure 4 Provided by the embodiment of the present application Figure 3 Detail enlarged view of part A in

[0024] Figure 5 Cross-sectional view of the blowing component and the suction component provided by the embodiment of the present application;

[0025] Figure 6 Partial structure schematic of the laser processing equipment provided by the embodiment of the present application Figure 1 ;

[0026] Figure 7 Partial structure schematic of the laser processing equipment provided by the embodiment of the present application Figure 2 .

[0027] Explanation of reference numerals in the drawings:

[0028] 1. Blowing component; 11. Outer cylinder; 111. First channel surface; 112. Air inlet; 113. Inner cylinder connection part; 114. Lens connection part; 12. Inner cylinder; 121. Second channel surface; 122. Outer cylinder connection part; 123. First groove; 124. Second groove; 13. Air outlet;

[0029] 2. Suction component; 21. Dust extraction part; 211. Dust extraction port; 22. Dust outlet; 23. Dust extraction seat;

[0030] 3. Lens component; 31. Field lens; 32. Galvo scanner;

[0031] 4. Frame;

[0032] 5. Fixed seat; 51. Angle connecting piece; 52. Connecting plate;

[0033] 6. Sliding module;

[0034] 7. External optical path system. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts fall within the scope of protection of this application.

[0036] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure of this application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0037] For ease of description, spatially relative relationship terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms such as "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "upper", "front", "rear", etc. This spatially relative relationship term is intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip, attitude change, or motion state change, then these directional indications will also change accordingly. For example, an element described as "below" or "beneath" other elements or features will subsequently be oriented as "above" or "over" other elements or features. Therefore, the example term "below" can include the orientations of above and below. The device may be oriented otherwise (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0038] To solve the technical problem in the prior art that dust and other impurities are easily adsorbed on the lens, affecting the laser processing accuracy and yield, this application provides a lens protection device and a laser processing device, which can collect dust in the area where the lower end of the lens is located, reduce the dust concentration at the source, and prevent dust and other impurities from being adsorbed on the lens (such as the field lens 31, etc.).

[0039] Please refer to Figures 1 to 7, in the first aspect of the embodiments of the present application, a lens protection device is provided, which includes a cylindrical air blowing component 1 and a dust extraction component 21. The dust extraction component 21 is docked with the lower end of the air blowing component 1, so that the dust extraction component 21 is located below the air blowing component 1. An air inlet 112 is provided on the outer wall of the air blowing component 1, which can be used to connect to an external air source to realize the input of compressed air. An air outlet 13 is provided on the inner wall of the air blowing component 1. The air blowing component 1 is provided with an air blowing channel, and the air inlet 112 is communicated with the air outlet 13 through the air blowing channel, so as to convey the compressed air to the air outlet 13. The air outlet 13 is annular or a plurality of air outlets 13 are arranged in a ring shape, and an annular air curtain can be formed on the inner circumference of the air blowing component 1, as Figure 3 , Figure 4 and Figure 5 shown, so as to isolate the dust and the lens assembly 3. Avoid impurities such as dust from passing through the air curtain and adsorbing on the field lens 31 at the bottom of the lens assembly 3, which affects the laser processing accuracy and yield.

[0040] A dust extraction port 211 is provided on the inner wall of the dust extraction component 21. The dust extraction port 211 is annular or a plurality of dust extraction ports 211 are arranged in a ring shape. The dust extraction port 211 is connected to a negative pressure device. On the one hand, it can be used to uniformly suck the dust and impurities in the inner peripheral area of the dust extraction component 21, realize the collection of the dust and impurities below the annular air curtain, reduce the dust concentration in the area below the lens assembly 3, reduce the number of dust particles from the source, and further avoid the dust from moving randomly below the field lens 31 and then crossing the air curtain and adsorbing on the field lens 31, as Figure 3 and Figure 5 shown. On the other hand, it can reduce the air pressure inside the dust extraction component 21, make the air curtain more stable and the shape more complete, and make it more difficult for dust to pass through the air curtain.

[0041] It should be noted that the axially penetrating optical path channel formed by the cylindrical air blowing component 1 and the dust extraction component 21. The lens assembly 3 is located at the top of the air blowing component 1, and the light beam emitted by the lens assembly 3 can pass through the optical path channel, so as to facilitate the laser processing operation on the workpiece below the dust extraction component 21, as Figure 1 , Figure 3 and Figure 6 shown.

[0042] It should be noted that through the cooperation of the air blowing component 1 and the dust extraction component 2 in the present application, the dust and other impurities below the lens assembly 3 can flow along the direction shown by the dotted arrow in Figure 5 . The dust is blown to the side away from the lens assembly 3 and collected by the dust extraction component 2. While forming an isolation air curtain below the lens assembly 3, the dust concentration below the lens can be reduced, and the possibility of dust and other impurities adsorbing on the lens assembly 3 can be greatly reduced, avoiding adverse effects on the laser processing accuracy and yield.

[0043] In some embodiments of the present application, please refer toFigure 1 , Figure 2 , Figure 3 and Figure 4 , the air blowing assembly 1 includes an inner cylinder 12 and an outer cylinder 11 sleeved on the inner cylinder 12. An air inlet 112 is arranged on the outer cylinder 11. An air blowing channel is formed between the outer cylinder 11 and the inner cylinder 12. The air outlet end of the air blowing channel is configured as an air outlet 13. The air outlet direction of the air outlet 13 is inclined and downward with respect to the central axis of the inner cylinder 12. By the air blowing assembly 1, a uniform annular air flow is formed in the circumferential direction of the optical path channel, and a complete and uniform conical air curtain is formed below the lens assembly 3, reducing the possibility of dust and other impurities penetrating the air curtain. The conical air curtain makes the blown air face the side where the dust extraction member 21 is located and will not blow towards the lens assembly 3, effectively protecting the lens assembly 3.

[0044] Specifically, a first channel surface 111 is provided on the inner wall of the outer cylinder 11, and a second channel surface 121 is provided on the outer wall of the inner cylinder 12. The first channel surface 111 and the second channel surface 121 are arranged opposite to each other to form an air blowing channel. The air blowing channel is integrally in an annular structure and can communicate with the air outlet 13 to form a uniform annular air flow.

[0045] In some embodiments of the present application, the distance between the first channel surface 111 and the second channel surface 121 is preferably 0.2 - 0.3 mm, that is, the channel width of the air blowing channel is preferably 0.2 - 0.3 mm. This is because when the distance between the first channel surface 111 and the second channel surface 121 is less than 0.2 mm, the assembly accuracy requirements for the outer cylinder 11 and the inner cylinder 12 are relatively high and it is difficult to manufacture. When the distance between the first channel surface 111 and the second channel surface 121 is greater than 0.3 mm, the air pressure of the annular air flow blown out from the air blowing channel is relatively small, and the blocking effect of the formed air curtain on dust and other impurities is not good.

[0046] In some embodiments of the present application, please refer to Figure 3 , Figure 4 and Figure 5 , a first air chamber is recessed on the outer wall of the inner cylinder 12. The first air chamber is opposite to the position of the air inlet 112. The compressed air input from the air inlet 112 enters the first air chamber. Since the air inlet 112 is arranged in a partial area of the outer cylinder 11, when the compressed air enters the air blowing assembly 1 through the air inlet 112, it is local air intake. When the compressed air enters the first air chamber, the compressed air can be buffered and pressure-maintained through the first air chamber. The first air chamber communicates with the air blowing channel and can transport the air flow after buffering and pressure-maintaining to the air blowing channel, converting the local air intake with large pressure into a stable and uniform annular air outlet through the first air chamber.

[0047] In some embodiments of the present application, please refer to Figure 3 , Figure 4 and Figure 5, a second air chamber is formed by recessing on the outer wall of the inner cylinder 12. The second air chamber is connected between the first air chamber and the air blowing channel. After the air flow in the first air chamber enters the second air chamber, it can be buffered and pressure-maintained again and the flow direction can be changed through the second air chamber.

[0048] The channel sizes of the first air chamber, the second air chamber, and the air blowing channel decrease in sequence, which can gradually increase the pressure during the process of buffering and pressure-maintaining the compressed air, and is used to reduce the dynamic loss caused by the flow direction change and collision of the air flow in the first air chamber, the second air chamber, and the air blowing channel, so that the formed air curtain is more stable and uniform.

[0049] In some embodiments of the present application, please refer to Figure 4 , the cross-sectional area of the first air chamber, the cross-sectional area of the second air chamber, and the cross-sectional area of the air blowing channel decrease in sequence, so that the channel sizes of the first air chamber, the second air chamber, and the air blowing channel decrease in sequence.

[0050] In some embodiments of the present application, both the first air chamber and the second air chamber are annular air chambers extending circumferentially along the outer periphery of the inner cylinder 12. The first air chamber and the second air chamber are communicated through the gap between the inner wall of the outer cylinder 11 and the outer wall of the inner cylinder 12. The compressed air inside the first air chamber enters the second air chamber in a relatively uniform annular air outlet manner. After the compressed air enters the second air chamber, the compressed air can be further buffered and pressure-maintained and the flow direction can be changed. The second air chamber is also communicated with the annular air blowing channel through the gap between the inner wall of the outer cylinder 11 and the outer wall of the inner cylinder 12. The compressed air after the flow direction change enters the annular air blowing channel in a more uniform annular air outlet manner, ensuring that a uniform and relatively strong annular air can be blown out from the air blowing channel, forming an air curtain to isolate dust and protect the field lens 31 above it, and preventing dust from entering and adsorbing to the field lens 31.

[0051] As a specific embodiment of the present application, along the axial direction of the air blowing assembly 1, a first groove 123 and a second groove 124 are sequentially arranged on the outer wall of the inner cylinder 12; wherein, the groove wall of the first groove 123 and the inner wall of the outer cylinder 11 enclose to form the first air chamber, and the groove wall of the second groove 124 and the inner wall of the outer cylinder 11 enclose to form the second air chamber, as Figure 4 shown.

[0052] In some embodiments of the present application, please refer to Figure 2 and Figure 4 , the outer cylinder 11 and the inner cylinder 12 are detachably connected, so that after the manufacturing of the outer cylinder 11 and the inner cylinder 12 are respectively realized, structures such as the first air chamber, the second air chamber, and the air blowing channel are formed by assembly between the inner cylinder 12 and the outer cylinder 11.

[0053] Specifically, the inner wall of the outer cylinder 11 is provided with a lens connection part 114 and an inner cylinder connection part 113. The lens connection part 114, the inner cylinder connection part 113, and the first air chamber are arranged in sequence along the axis direction of the outer cylinder 11. The inner cylinder 12 is provided with an outer cylinder connection part 122 at one end of the first air chamber away from the second air chamber. The connection between the outer cylinder 11 and the inner cylinder 12 is realized through the cooperation of the outer cylinder connection part 122 and the inner cylinder connection part 113. At the same time, the connection area is far away from the first air chamber, the second air chamber, and the air blowing channel, avoiding affecting the air flow.

[0054] It should be noted that, in order to prevent air leakage between the outer cylinder connection part 122 and the inner cylinder connection part 113, corresponding sealing measures can be set between the outer cylinder connection part 122 and the inner cylinder connection part 113. Specifically, when the outer cylinder connection part 122 is an external thread and the inner cylinder connection part 113 is an internal thread, sealant can be set inside the thread, and the sealant is cured inside the thread after threaded connection to achieve sealing.

[0055] In some embodiments of the present application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 , a first dust extraction channel is formed inside the barrel wall of the dust extraction part 21. The dust extraction port 211 is connected to the negative pressure device through the first dust extraction channel, so as to facilitate dust and other impurities to enter the inside of the first dust extraction channel through the dust extraction port 211, and be sucked and collected through the negative pressure device.

[0056] In some embodiments of the present application, a plurality of dust extraction ports 211 are evenly arranged on the inner side wall of the dust extraction part 21 and are communicated with the first dust extraction channel. When the annular wind blown out by the air blowing channel and the air outlet 13 converges below the lens assembly 3, an annular wind will be formed, and a wind curtain is formed to isolate and protect the upper field lens 31. The dust extraction ports 211 on the inner side wall of the dust extraction part 21 can suck the dust and other impurities at the lower end of the field lens 31, reducing the amount of dust at the lower end of the field lens 31 and further protecting the field lens 31.

[0057] In some embodiments of the present application, please refer to Figure 1 , Figure 2 and Figure 3 , the lens protection device further includes a dust extraction seat 23. The dust extraction seat 23 is connected to the outside of the dust extraction part 21. A second dust extraction channel is provided inside the dust extraction seat 23, and the dust in the first dust extraction channel can be introduced into the second dust extraction channel. The dust extraction port 211 is connected to the negative pressure device through the first dust extraction channel, the second dust extraction channel, so as to facilitate the suction, transportation, and collection of dust and other impurities.

[0058] In some embodiments of the present application, the dust extraction member 21 and the dust extraction seat 23 are of an integral structure, and an integrated dust extraction assembly 2 can be formed. The dust extraction assembly 2 can be manufactured by methods such as integral injection molding. While simplifying the manufacturing process of the dust extraction assembly 2, a connected first dust extraction channel and second dust extraction channel can be formed inside the dust extraction assembly 2.

[0059] In some embodiments of the present application, please refer to Figure 1 and Figure 2 , the dust extraction assembly 2 further includes a dust outlet 22 connected to the dust extraction seat 23. One end of the dust outlet 22 is connected to the second dust extraction channel, and the other end of the dust outlet 22 is used to be connected to a negative pressure device, so that the second dust extraction channel, the first dust extraction channel, and the dust outlet 211 have a negative pressure suction force on the dust inside the optical path channel, facilitating dust and other impurities to sequentially enter the dust outlet 211, the first dust extraction channel, the second dust extraction channel, and the dust outlet 22 under the action of the suction force, and being discharged from the dust extraction assembly 2 through the dust outlet 22 to the impurity collection assembly for collection.

[0060] In some embodiments of the present application, please refer to Figure 1 , Figure 6 and Figure 7 , the lens protection device further includes a fixing base 5, which can be used to realize the connection between the lens protection device and an external device.

[0061] In some embodiments of the present application, the fixing base 5 is connected to the dust extraction seat 23 in the dust extraction assembly 2, and the connection between the dust extraction assembly 2 and an external device (such as the main body of a laser processing device) can be realized.

[0062] In the second aspect of the embodiments of the present application, a laser processing device is provided, including the lens protection device in the above embodiments, and further including a lens assembly 3. The air blowing assembly 1 and the dust extraction assembly 2 are sequentially arranged below the lens assembly 3, and the air blowing assembly 1 is connected to the bottom of the lens assembly 3. One end of the optical path channel is connected to the lens assembly 3, so that the light beam emitted by the lens assembly 3 can irradiate the workpiece below the lens protection device through the optical path channel for laser processing.

[0063] In some embodiments of the present application, the lens assembly 3 includes a connected galvanometer 32 and a field lens 31. The top of the field lens 31 is connected to the galvanometer 32, and the bottom of the field lens 31 is connected to the air blowing assembly 1. By sequentially arranging the air blowing assembly 1 and the dust extraction assembly 2 in the height direction (from top to bottom), dust and other impurities are prevented from being adsorbed on the field lens 31.

[0064] Specifically, a positioning step is formed between the top of the outer cylinder 11 and the top of the inner cylinder 12, which can be used to abut against the bottom of the field lens 31. A plurality of connection holes are circumferentially provided on the lens connection portion 114, and connecting members such as screws can be arranged in the connection holes to realize the fixed connection between the outer cylinder 11 and the field lens 31, such as Figure 1 andFigure 6 as shown

[0065] In some embodiments of the present application, please refer to Figure 6 and Figure 7 , the laser processing device further includes a frame 4. The lens assembly 3 is movably arranged on the frame 4 through a sliding module 6. The lens assembly 3 is connected to the slider of the sliding module 6 to realize the position adjustment of the lens assembly 3. The air blowing assembly 1 is fixedly connected to the field lens 31 and can move synchronously with the field lens 31.

[0066] One end of the fixing seat 5 is connected to the frame 4, and the other end of the fixing seat 5 is connected to the dust extraction assembly 2, which can realize the relative fixation between the dust extraction assembly 2 and the frame 4.

[0067] In some embodiments of the present application, a dust extraction seat 23 is provided on one side of the dust extraction part 21 and is connected to the corner connecting part 51 in the fixing seat 5, so as to realize the connection with the frame 4. Bar-shaped holes are provided on both right-angle plates of the corner connecting part 51, which is convenient for adjusting the connection position. The fixing seat 5 further includes a connecting plate 52 between the frame 4 and the corner connecting part 51. The relative fixation between the dust extraction seat 23 and the frame 4 can be realized through the fixing seat 5, as Figure 7 shown

[0068] It should be noted that corresponding dust extraction channels are provided inside both the dust extraction part 21 and the dust extraction seat 23. The dust outlet 22 can be arranged on the dust extraction part 21 or on the dust extraction seat 23, and the purpose of the present application can be achieved. However, in order to avoid the hose connected to the dust outlet 22 interfering with the processing area below the dust extraction part 21, it is preferably to arrange the dust outlet 22 on the dust extraction seat 23, away from the processing area below the lens assembly 3.

[0069] In some other embodiments of the present application, the dust extraction part 21 of the dust extraction assembly 2 can also be fixedly connected to the outer cylinder 11 of the air blowing assembly 1, so that the dust extraction assembly 2 moves synchronously with the air blowing assembly 1 and the lens assembly 3. However, corresponding protection measures need to be set for the negative pressure pipeline at this time, such as fixing and binding part of the negative pressure pipeline, or wrapping a protective pad outside the negative pressure pipeline, etc. When the lens protection device moves synchronously with the lens assembly 3, it is convenient to pick and place the workpiece. At this time, there is no need to set the fixing seat 5 to realize the fixed connection between the dust extraction assembly 2 and the frame 4.

[0070] In some embodiments of the present application, the laser processing device further includes an external optical path system 7 connected to the lens assembly 3, which is convenient for performing laser processing operations on the workpiece, as Figure 6 shown

[0071] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0072] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms when used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be referred to as a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0073] The above description is only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A lens protection device, characterized in that: The invention comprises a cylindrical air blowing component (1) and a dust extracting member (21), wherein the dust extracting member (21) is butt-jointed with the lower end of the air blowing component (1); an air inlet (112) is arranged on the outer wall of the air blowing component (1), an air outlet (13) is arranged on the inner wall of the air blowing component (1), and the air blowing component (1) is provided with an air blowing channel, wherein the air inlet (112) is connected with the air outlet (13) through the air blowing channel, and the air outlet (13) is in a ring shape or a plurality of the air outlets (13) are arranged in a ring shape; and a dust extracting port (211) is arranged on the inner wall of the dust extracting member (21), wherein the dust extracting port (211) is in a ring shape or a plurality of the dust extracting ports (211) are arranged in a ring shape, and the dust extracting port (211) is connected to a negative pressure device.

2. The lens protection device according to claim 1, characterized in that: The blowing assembly (1) comprises an inner cylinder (12) and an outer cylinder (11) sleeved on the inner cylinder (12); the air inlet (112) is arranged on the outer cylinder (11); the blowing channel is formed between the outer cylinder (11) and the inner cylinder (12); the air outlet end of the blowing channel is configured as the air outlet (13); the air outlet direction of the air outlet (13) is inclined with respect to the center line of the inner cylinder (12) and faces downward.

3. The lens protection device according to claim 2, characterized in that: A first air chamber is formed by a depression on the outer wall of the inner tube (12), the first air chamber is opposite to the air inlet (112), and the first air chamber is connected to the air blowing channel.

4. The lens protection device according to claim 3, characterized in that: A second air chamber is formed on the outer wall of the inner tube (12), and the second air chamber is connected between the first air chamber and the blowing channel. The channel sizes of the first air chamber, the second air chamber and the blowing channel decrease in sequence.

5. The lens protection device according to claim 3 or 4, characterized in that: The outer cylinder (11) and the inner cylinder (12) are detachably connected; the inner wall of the outer cylinder (11) is provided with a lens connecting portion (114) and an inner cylinder connecting portion (113); the lens connecting portion (114), the inner cylinder connecting portion (113) and the first air chamber are arranged in sequence along the axial direction of the outer cylinder (11).

6. The lens protection device according to any one of claims 1 to 4, characterized in that: A first dust extraction channel is formed in the cylinder wall of the dust extraction member (21), and the dust extraction port (211) is connected to the negative pressure device through the first dust extraction channel.

7. The lens protection device according to claim 6, characterized in that: It also comprises a dust extraction seat (23), the dust extraction seat (23) being connected to the outer side of the dust extraction member (21), a second dust extraction channel being arranged in the dust extraction seat (23), and the dust extraction port (211) being connected via the first dust extraction channel, the second dust extraction channel and the negative pressure device.

8. The lens protection device according to claim 7, characterized in that: The dust extraction member (21) and the dust extraction seat (23) are an integrated structure.

9. The lens protection device according to claim 7, characterized in that: It also comprises a fixing seat (5), wherein the fixing seat (5) is connected to the dust extraction seat (23).

10. A laser processing device, comprising the lens protection device according to any one of claims 1 to 9, characterized in that: It also comprises a lens assembly (3), wherein the air blowing assembly (1) is connected to the bottom of the lens assembly (3).

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