Negative-pressure dustproof isolation device for optical coating area

Abstract

The invention belongs to the technical field of optical coating, and particularly relates to an optical coating area negative pressure dustproof isolation device which comprises an optical coating chamber, a long outer pipe is arranged on the outer wall of one side of the optical coating chamber, a first spring is fixedly connected to the inner wall of one end of the long outer pipe, and an inner pipe is fixedly connected to the outer wall of one end of the first spring. And the inner pipe is slidably connected to the inner wall of the long outer pipe, and a ventilation opening is formed in the outer wall of the end, close to the first spring, of the inner pipe. Through the sliding connection design of the long outer pipe and the inner pipe and the elastic supporting of the first spring, the inner pipe can be automatically adjusted to stretch out and draw back according to the tension of the film, and stable butt joint of the butt joint hose and the dust collection roller is ensured. The equidistant dust collection grooves formed in the surface of the dust collection roller form local negative pressure under driving of the air blower and directly act on the surface of the film, the dust adsorption efficiency can be effectively improved, the first rotating connector allows the dust collection roller to freely rotate along with movement of the film, friction damage is avoided, and meanwhile continuous dust removal is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical coating, and particularly to a negative pressure dust-proof isolation device for an optical coating area. Background Art

[0002] Optical coating technology is one of the key processes in the manufacturing of optical components. By uniformly coating an optical coating with specific functions (such as an anti-reflection film, a reflection film, a filter film, etc.) on the surface of a thin film or a substrate, the regulation and optimization of light waves can be achieved. Such coatings are widely used in fields such as display screens, lenses, solar cells, and optical sensors. Their coating quality directly determines the optical performance and service life of the final product. During the coating process, the cleanliness of the thin film surface is crucial. Any tiny dust or impurities may cause problems such as uneven coating, bubbles, or peeling, resulting in a decrease in product yield and performance defects.

[0003] However, in the prior art, before entering the coating chamber, the thin film often adheres to a large amount of dust due to reasons such as electrostatic adsorption and environmental exposure. Traditional dust removal means such as electrostatic precipitators, mechanical brushing, or compressed air blowing have some deficiencies: electrostatic dust removal has limited effect on non-conductive dust and may introduce secondary charges; mechanical brushing is likely to scratch the surface of the thin film, especially less applicable to high-precision optical thin films; compressed air blowing is difficult to completely remove fine dust, and the airflow disturbance may redeposit the dust onto the thin film. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a negative pressure dust-proof isolation device for an optical coating area, which overcomes the deficiencies of the prior art and effectively solves the problem of limited effect of traditional dust removal means.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A negative pressure dust-proof isolation device for an optical coating area includes an optical coating chamber. One outer wall of the optical coating chamber is provided with a long outer tube, and one end inner wall of the long outer tube is fixedly connected with a first spring. One end outer wall of the first spring is fixedly connected with an inner tube, and the inner tube is slidably connected to the inner wall of the long outer tube. An air vent is formed on one end outer wall of the inner tube close to the first spring, and the other end outer wall of the inner tube is fixedly connected with a docking hose. Adjacent first rotary joints are installed on one end outer wall of the docking hose, and the first rotary joints are rotatably connected with suction rollers distributed up and down through sealed bearings. Suction grooves are formed on the outer walls of the suction rollers at equal distances. An outer part of the dust suction roller is rotatably connected with a fixing sleeve, and roller frames are fixedly connected to outer walls at two ends of the fixing sleeve. A connecting shaft is installed at a center of an outer wall of each of the two roller frames. One side inner wall of the optical coating chamber is fixedly connected with a sleeve through a screw. A fixing disk is arranged on an outer wall of the connecting shaft on one side of the sleeve, and a second spring is fixedly connected between the fixing disk and the sleeve.

[0006] Preferably, the connecting shaft is rotatably connected to two side inner walls of the optical coating chamber through bearings, and the connecting shaft penetrates through an inner wall of the fixing disk. The second spring is arranged outside the connecting shaft.

[0007] Preferably, positioning disks which are symmetrically distributed are screwed on an outer wall of the connecting shaft between the two roller frames.

[0008] Preferably, a second rotary joint is installed on an outer wall of one side of the long outer tube, and the second rotary joint is rotatably connected with a dust suction pipe through a sealed bearing. A blower is installed on an outer wall of one end of the dust suction pipe, and a dust removal pipe is installed on an inner wall of an air outlet of the blower.

[0009] Preferably, a support plate is fixedly connected to an outer wall of one side of the optical coating chamber through a screw, and the outer wall of the other end of the long outer tube is welded to a bottom inner wall of the support plate.

[0010] Preferably, symmetrically distributed support frames are welded to an outer wall of one side of the optical coating chamber, and a sliding roller is rotatably connected between the two support frames. A thin film is slidably connected to an outer wall of the sliding roller, and the thin film is slidably connected between the two dust suction rollers. The thin film is slidably connected to an outer wall of a guide roller.

[0011] Preferably, an optical coater is fixedly connected to a top of an inner wall of the other side of the optical coating chamber through a screw.

[0012] Preferably, an upper limiting plate and a lower limiting plate are respectively welded to an inner wall of one side of the optical coating chamber, and a height difference between the upper limiting plate and the lower limiting plate is consistent with a width dimension of the roller frame.

[0013] Preferably, a film inlet is arranged on an outer wall of one side of the optical coating chamber, and a film outlet is arranged on an outer wall of the top of the optical coating chamber. The thin film penetrates through the film inlet and the film outlet.

[0014] The beneficial effects of the present invention are as follows: 1. The negative pressure dust-proof isolation device for the optical coating area of the present invention, through the sliding connection design of the long outer tube and the inner tube, and with the elastic support of the first spring, the inner tube can automatically adjust its telescopic length according to the film tension to ensure the stable connection between the docking hose and the dust suction roller. The equidistant dust suction grooves opened on the surface of the dust suction roller form a local negative pressure under the drive of the blower, which directly acts on the film surface, can effectively improve the efficiency of dust adsorption, and at the same time, the first rotary joint allows the dust suction roller to rotate freely with the movement of the film, avoiding frictional damage and realizing continuous dust removal; 2. The negative pressure dust-proof isolation device for the optical coating area of the present invention, the rigid frame composed of the fixed sleeve and the roller frame, through the elastic cooperation of the connecting shaft and the second spring, ensures that the dust suction roller and the film surface maintain a constant contact pressure. The upper limit plate and the lower limit plate limit the displacement range of the roller frame to prevent deviation caused by vibration. The positioning disk is screwed onto the connecting shaft, and the distance between the dust suction rollers can be quickly adjusted to adapt to films of different widths. The dust removal pipe and the blower form a closed circulation system, and the dust is collected under negative pressure and then discharged centrally to avoid secondary pollution; 3. The negative pressure dust-proof isolation device for the optical coating area of the present invention, the support frame and the sliding roller guide the film to pass smoothly through the film inlet and the film outlet, and the guiding roller further corrects the film path to ensure that it accurately passes between the dust suction roller and the optical coater. The inside of the optical coating chamber is designed with negative pressure isolation to physically separate the dust removal area and the coating area, reducing the probability of dust intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of the overall structure of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention; Figure 2 is a front view of the overall structure of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention; Figure 3 is a side view of the internal structure of the optical coating chamber of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention; Figure 4 is a three-dimensional schematic diagram of the internal structure of the optical coating chamber of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention; Figure 5 is a schematic diagram of the connection structure of the long outer tube of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention; Figure 6 is Figure 5 an enlarged schematic diagram of the structure of part A; Figure 7 is a schematic diagram of the internal structure of the long outer tube of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention; Figure 8 is a schematic diagram of the internal connection structure of the fixed sleeve of a negative pressure dust-proof isolation device for the optical coating area proposed by the present invention.

[0016] In the figure: 1. Optical coating chamber; 2. Long outer tube; 3. First spring; 4. Inner tube; 5. Ventilation port; 6. Docking hose; 7. First rotary joint; 8. Dust suction roller; 9. Dust suction groove; 10. Fixed sleeve; 11. Roller frame; 12. Guide roller; 13. Connecting shaft; 14. Sleeve; 15. Fixed disk; 16. Second spring; 17. Positioning disk; 18. Second rotary joint; 19. Dust suction pipe; 20. Blower; 21. Dust removal pipe; 22. Optical coater; 23. Support plate; 24. Support frame; 25. Sliding roller; 26. Upper limit plate; 27. Lower limit plate; 28. Film inlet; 29. Film outlet. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] Referring to Figures 1-8 , Embodiment 1, an optical coating area negative pressure dust-proof isolation device, including an optical coating chamber 1, a long outer tube 2 is provided on the outer wall of one side of the optical coating chamber 1, and a first spring 3 is fixedly connected to the inner wall of one end of the long outer tube 2. One end of the first spring 3 is fixedly connected to the outer wall of an inner tube 4, and the inner tube 4 is slidably connected to the inner wall of the long outer tube 2. A ventilation port 5 is opened on the outer wall of the inner tube 4 near one end of the first spring 3, and a docking hose 6 is fixedly connected to the outer wall of the other end of the inner tube 4. A first rotary joint 7 is installed on the outer wall of one end of the docking hose 6, and the first rotary joint 7 is rotatably connected to a dust suction roller 8 distributed up and down through a sealed bearing. Dust suction grooves 9 are opened on the outer wall of the dust suction roller 8 at equal distances. A second rotary joint 18 is installed on the outer wall of one side of the long outer tube 2, and the second rotary joint 18 is rotatably connected to a dust suction pipe 19 through a sealed bearing. A blower 20 is installed on the outer wall of one end of the dust suction pipe 19, and a dust removal pipe 21 is installed on the inner wall of the air outlet of the blower 20.

[0019] The long outer tube 2 is fixed to the support plate 23 by welding, and a first spring 3 and an inner tube 4 are arranged inside one end thereof. The inner tube 4 slides within the long outer tube 2, and the first spring 3 provides axial elastic compensation. When the film tension changes, the inner tube 4 expands and contracts along the long outer tube 2, and the air vent 5 maintains the connection between the dust suction tube 19 and the docking hose 6. By relying on the air vent 5 to balance the air pressure, it is ensured that the docking hose 6 is always tightly connected to the dust suction roller 8. The dust suction tube 19 is connected to the long outer tube 2 through a second rotary joint 18. After the blower 20 is started, a negative pressure area is formed at the dust suction groove 9. The dust suction roller 8 rotates synchronously with the advancement of the film, and the dust suction groove 9 periodically aligns with the film surface to achieve directional adsorption, so that the dust suction groove 9 can only adsorb the dust on the film surface, enhancing the dust removal effect. Moreover, the blower 20 sucks the dust-containing air flow through the dust suction tube 19 into the dust removal tube 21, and discharges it to the external collection device after multi-stage filtration.

[0020] In this embodiment, through the sliding connection design of the long outer tube 2 and the inner tube 4, and with the elastic support of the first spring 3, the inner tube 4 can automatically adjust its expansion and contraction according to the film tension, ensuring the stable docking of the docking hose 6 and the dust suction roller 8. The equidistant dust suction grooves 9 provided on the surface of the dust suction roller 8 form a local negative pressure under the drive of the blower 20, which directly acts on the film surface, effectively improving the efficiency of adsorbing dust. Moreover, the first rotary joint 7 allows the dust suction roller 8 to rotate freely with the movement of the film, avoiding frictional damage and realizing continuous dust removal at the same time.

[0021] Embodiment 2: A fixed sleeve 10 is rotatably connected to the outside of the dust suction roller 8, and roller frames 11 are fixedly connected to the outer walls at both ends of the fixed sleeve 10. A connecting shaft 13 is installed at the center of the outer walls of the two roller frames 11. One side inner wall of the optical coating chamber 1 is fixedly connected with a sleeve 14 by screws, and a fixing disk 15 is arranged on one side of the sleeve 14 on the outer wall of the connecting shaft 13. A second spring 16 is fixedly connected between the fixing disk 15 and the sleeve 14.

[0022] The connecting shaft 13 is fixed to both sides of the optical coating chamber 1 through bearings. The second spring 16 connects the fixing disk 15 and the sleeve 14, enabling the roller frame 11 to tilt with the adjustment of the film tension. Moreover, the positioning disk 17 adjusts the distance between the roller frames 11 through threads to adapt to different film widths.

[0023] In this embodiment, the rigid frame formed by the fixed sleeve 10 and the roller frames 11, through the elastic cooperation of the connecting shaft 13 and the second spring 16, ensures that the dust suction roller 8 maintains a constant contact pressure with the film surface. The upper limit plate 26 and the lower limit plate 27 define the displacement range of the roller frame 11 to prevent deviation caused by vibration. The positioning disk 17 is screwed onto the connecting shaft 13, and the distance between the dust suction rollers 8 can be quickly adjusted to adapt to films of different widths. The dust removal tube 21 and the blower 20 form a closed circulation system, and the dust is collected under negative pressure and discharged centrally to avoid secondary pollution.

[0024] The connecting shaft 13 is rotatably connected to the inner walls on both sides of the optical coating chamber 1 through bearings, and the connecting shaft 13 penetrates through the inner wall of the fixed disk 15. The second spring 16 is arranged outside the connecting shaft 13. Symmetrically distributed positioning disks 17 are screwed on the outer wall of the connecting shaft 13 between the two roller frames 11.

[0025] One outer wall of the optical coating chamber 1 is fixedly connected by screws to a support plate 23, and the other outer wall of the long outer tube 2 is welded to the bottom inner wall of the support plate 23.

[0026] In the third embodiment, an optical coater 22 is fixedly connected by screws to the top of the inner wall on the other side of the optical coating chamber 1. Symmetrically distributed support frames 24 are welded to one outer wall of the optical coating chamber 1, and a sliding roller 25 is rotatably connected between the two support frames 24. A thin film is slidably connected to the outer wall of the sliding roller 25, and the thin film is slidably connected between the two dust suction rollers 8. The thin film is slidably connected to the outer wall of the guide roller 12. An inlet film port 28 is arranged on one outer wall of the optical coating chamber 1, and an outlet film port 29 is arranged on the top outer wall of the optical coating chamber 1. The thin film penetrates through the inside of the inlet film port 28 and the outlet film port 29.

[0027] In this embodiment, the support frame 24 and the sliding roller 25 guide the thin film to smoothly pass through the inlet film port 28 and the outlet film port 29, and the guide roller 12 further corrects the path of the thin film to ensure that it accurately passes between the dust suction roller 8 and the optical coater 22. The inside of the optical coating chamber 1 is designed with negative pressure isolation to physically separate the dust removal area and the coating area, reducing the probability of dust intrusion.

[0028] Through the above scheme, the thin film enters from the inlet film port 28 and is guided by the sliding roller 25 and the guide roller 12 to between the two dust suction rollers 8 in the upper and lower parts. The dust-removed thin film is parallel to one side of the optical coater 22. The optical coater 22 is fixedly connected to the top inner wall of the optical coating chamber 1 by screws, and the optical coater 22 is aligned with the surface of the thin film for optical spraying. The outlet film port 29 is designed as a slit structure to reduce the backflow of external dust.

[0029] An upper limit plate 26 and a lower limit plate 27 are respectively welded to one inner wall of the optical coating chamber 1, and the height difference between the upper limit plate 26 and the lower limit plate 27 is the same as the width dimension of the roller frame 11.

[0030] Through the above scheme, the upper limit plate 26 and the lower limit plate 27 are welded to the inner wall of the coating chamber, and their height difference precisely matches the width of the roller frame 11, so that the roller frame 11 remains horizontally arranged when not under force.

[0031] Working principle: Thin film conveying and dust removal stage: The film enters the optical coating chamber 1 from the film inlet 28, adjusts its path through the sliding roller 25 and the guiding roller 12, and enters between the upper and lower dust suction rollers 8. After the blower 20 is started, a negative pressure is formed at the dust suction groove 9 to adsorb the dust on the film surface. The dust suction roller 8 rotates as the film moves, and the first rotary joint 7 ensures that the docking hose 6 transmits the negative pressure air flow without distortion.

[0032] Dynamic pressure regulation and isolation: When the film tension changes, the inner tube 4 slides inside the long outer tube 2, and the first spring 3 compensates for the displacement to keep the contact pressure between the dust suction roller 8 and the film constant. The second spring 16 buffers the vibration of the connecting shaft 13, and the upper limit plate 26 and the lower limit plate 27 limit the stopping range of the roller frame 11 to ensure the stability of the initial position.

[0033] Coating and dust emission: After dust removal, the film is sprayed with a functional layer by the optical coater 22 to improve the coating uniformity. The dust-containing air flow enters the dust removal pipe 21 through the dust suction pipe 19. After being separated by a filter screen in the later stage, the clean air is discharged, so that the dust is collected in a closed container. The coated film is led out from the film outlet 29. The whole process is completed in a negative pressure isolation environment, reducing the risk of dust pollution. After the film is coated, the blower 20 is turned off, and the dust suction roller 8 resets under the action of the second spring 16.

[0034] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An optical coating area negative pressure dust-proof isolation device, comprising an optical coating chamber (1), characterized in that, On one outer wall of the optical coating chamber (1), there is a long outer tube (2), and a first spring (3) is fixedly connected to the inner wall of one end of the long outer tube (2). One end of the first spring (3) is fixedly connected to the outer wall of an inner tube (4), and the inner tube (4) is slidably connected to the inner wall of the long outer tube (2). An air vent (5) is opened on the outer wall of the inner tube (4) near one end of the first spring (3), and a docking hose (6) is fixedly connected to the outer wall of the other end of the inner tube (4). A first rotary joint (7) is installed on the outer wall of one end of the docking hose (6) in an adjacent distribution, and a dust suction roller (8) distributed up and down is rotatably connected to the first rotary joint (7) through a sealed bearing. Dust suction grooves (9) are opened on the outer wall of the dust suction roller (8) at equal distances; A fixed sleeve (10) is rotatably connected to the outside of the dust suction roller (8), and roller frames (11) are fixedly connected to the outer walls of both ends of the fixed sleeve (10). A connecting shaft (13) is installed at the center of the outer walls of the two roller frames (11). One side inner wall of the optical coating chamber (1) is fixedly connected with a sleeve (14) by screws, and a fixed disk (15) is arranged on the outer wall of the connecting shaft (13) on one side of the sleeve (14). A second spring (16) is fixedly connected between the fixed disk (15) and the sleeve (14).

2. The negative pressure dust-proof isolation device for an optical coating area according to claim 1, wherein The connecting shaft (13) is rotatably connected to the inner walls of both sides of the optical coating chamber (1) through bearings, and the connecting shaft (13) penetrates through the inner wall of the fixed disk (15). The second spring (16) is arranged outside the connecting shaft (13).

3. The negative pressure dust-proof isolation device for the optical coating area according to claim 1, wherein, Symmetrically distributed positioning disks (17) are screwed on the outer wall of the connecting shaft (13) between the two roller frames (11).

4. An optical coating area negative pressure dust-proof isolation device according to claim 1, characterized in that, A second rotary joint (18) is installed on one outer wall of the long outer tube (2), and a dust suction pipe (19) is rotatably connected to the second rotary joint (18) through a sealed bearing. A blower (20) is installed on the outer wall of one end of the dust suction pipe (19), and a dust removal pipe (21) is installed on the inner wall of the air outlet of the blower (20).

5. An optical coating area negative pressure dust-proof isolation device according to claim 1, characterized in that One outer wall of the optical coating chamber (1) is fixedly connected with a support plate (23) by screws, and the other end outer wall of the long outer tube (2) is welded to the bottom inner wall of the support plate (23).

6. The optical coating area negative pressure dust-proof isolation device according to claim 1, characterized in that Symmetrically distributed support frames (24) are welded to one outer wall of the optical coating chamber (1), and a sliding roller (25) is rotatably connected between the two support frames (24). A thin film is slidably connected to the outer wall of the sliding roller (25), and the thin film is slidably connected between the two dust suction rollers (8). The thin film is slidably connected to the outer wall of the guide roller (12).

7. An optical coating area negative pressure dust-proof isolation device according to claim 1, characterized in that, An optical coater (22) is fixedly connected to the top of the other inner wall of the optical coating chamber (1) by screws.

8. An optical coating area negative pressure dust-proof isolation device according to claim 1, characterized in that An upper limit plate (26) and a lower limit plate (27) are respectively welded to one side inner wall of the optical coating chamber (1), and the height difference between the upper limit plate (26) and the lower limit plate (27) is the same as the width dimension of the roller frame (11).

9. An optical coating area negative pressure dust-proof isolation device according to claim 6, characterized in that, One outer wall of the optical coating chamber (1) is provided with a film inlet (28), and the top outer wall of the optical coating chamber (1) is provided with a film outlet (29). The film passes through the inside of the film inlet (28) and the film outlet (29).

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