A negative pressure dustproof isolation device for optical coating areas

Abstract

The present invention belongs to the field of optical coating technology, and in particular, is a negative pressure dustproof isolation device for an optical coating area, comprising an optical coating chamber, wherein a long outer tube is provided on the outer wall of one side of the optical coating chamber, and a first spring is fixedly connected to the inner wall of one end of the long outer tube, an inner tube is fixedly connected to the outer wall of one end of the first spring, and the inner tube is slidably connected to the inner wall of the long outer tube, and a vent is provided on the outer wall of the end of the inner tube close to the first spring. The present invention adopts a sliding connection design between the long outer tube and the inner tube, and cooperates with the elastic support of the first spring, so that the inner tube can automatically adjust and retract according to the tension of the film, ensuring the stable docking of the docking hose and the dust collection roller. The equidistant dust collection grooves provided on the surface of the dust collection roller form a local negative pressure when driven by a blower, directly acting on the surface of the film, which can effectively improve the efficiency of dust adsorption, and the first rotary joint allows the dust collection roller to rotate freely as the film moves, avoiding friction damage and achieving continuous dust removal.

Description

Technical Field

[0001] The present invention relates to the field of optical coating technology, and in particular to a negative pressure dustproof isolation device for an optical coating area. Background Art

[0002] Optical coating technology is a key process in optical component manufacturing. It achieves control and optimization of light waves by uniformly applying specialized optical coatings (such as antireflection coatings, reflective coatings, and optical filters) to the surface of thin films or substrates. These coatings are widely used in display screens, lenses, solar cells, optical sensors, and other fields. The quality of the coating directly determines the optical performance and service life of the final product. During the coating process, the cleanliness of the film surface is crucial. Any tiny dust or impurities can cause uneven coating, bubbles, or detachment, leading to reduced product yield and performance defects.

[0003] However, prior to entering the coating chamber, films often accumulate a large amount of dust on their surfaces due to electrostatic adsorption, environmental exposure, and other factors. Traditional dust removal methods, such as electrostatic precipitators, mechanical brushes, or compressed air purges, have several drawbacks: electrostatic precipitators are limited in their effectiveness against non-conductive dust and may introduce secondary charges; mechanical brushes can easily scratch the film surface, making them particularly unsuitable for high-precision optical films; and compressed air purges struggle to completely remove fine dust particles, and airflow disturbances can redeposit dust onto the film. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a negative pressure dust-proof isolation device for an optical coating area, which overcomes the shortcomings of the existing technology and effectively solves the problem of limited effect of traditional dust removal means.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A negative pressure dust-proof isolation device for an optical coating area, comprising an optical coating chamber, wherein a long outer tube is provided on an outer wall of one side of the optical coating chamber, and a first spring is fixedly connected to the inner wall of one end of the long outer tube, an inner tube is fixedly connected to the outer wall of one end of the first spring, and the inner tube is slidably connected to the inner wall of the long outer tube, a vent is provided on the outer wall of one end of the inner tube close to the first spring, and a docking hose is fixedly connected to the outer wall of the other end of the inner tube, an adjacent first rotary joint is installed on the outer wall of one end of the docking hose, and the first rotary joint is rotatably connected to a dust collection roller distributed above and below via a sealed bearing, and the outer wall of the dust collection roller is provided with dust collection grooves distributed equidistantly;

[0007] The outside of the dust suction roller is rotatably connected to a fixed sleeve, and the outer walls of both ends of the fixed sleeve are fixedly connected to roller frames, a connecting shaft is installed at the center of the outer walls of the two roller frames, the inner wall of one side of the optical coating chamber is fixedly connected to a sleeve by screws, and a fixed disk is provided on the outer wall of the connecting shaft on one side of the sleeve, and a second spring is fixedly connected between the fixed disk and the sleeve.

[0008] Preferably, the connecting shaft is rotatably connected to the inner walls on both sides of the optical coating chamber through bearings, and the connecting shaft is arranged through the inner wall of the fixed plate, and the second spring is arranged outside the connecting shaft.

[0009] Preferably, symmetrically distributed positioning plates are screwed on the outer wall of the connecting shaft between the two roller frames.

[0010] Preferably, a second rotary joint is installed on the outer wall of one side of the long outer tube, and the second rotary joint is rotatably connected to a dust suction pipe through a sealed bearing, a blower is installed on the outer wall of one end of the dust suction pipe, and a dust removal pipe is installed on the inner wall of the air outlet of the blower.

[0011] Preferably, the outer wall of one side of the optical coating chamber is fixedly connected to the support plate by screws, and the outer wall of the other end of the long outer tube is welded to the bottom inner wall of the support plate.

[0012] Preferably, the outer wall of one side of the optical coating chamber is welded with symmetrically distributed support frames, and a sliding roller is rotatably connected between the two support frames, a film is slidably connected to the outer wall of the sliding roller, and the film is slidably connected between the two suction rollers, and the film is slidably connected to the outer wall of the guide roller.

[0013] Preferably, an optical coater is fixedly connected to the top of the inner wall on the other side of the optical coating chamber by screws.

[0014] Preferably, an upper limiting plate and a lower limiting plate are welded to the inner wall of one side of the optical coating chamber, and the height difference between the upper limiting plate and the lower limiting plate is consistent with the width of the roller frame.

[0015] Preferably, a film inlet is provided on one outer wall of the optical coating chamber, and a film outlet is provided on the top outer wall of the optical coating chamber, and the film passes through the inside of the film inlet and the film outlet.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention's negative pressure dust isolation device for the optical coating area utilizes a sliding connection design between a long outer tube and an inner tube, coupled with the elastic support of a first spring. The inner tube automatically adjusts and expands according to film tension, ensuring stable docking between the docking hose and the suction roller. Equidistant suction grooves on the surface of the suction roller, driven by a blower, create a localized negative pressure that directly acts on the film surface, effectively improving dust absorption efficiency. Furthermore, a first rotary joint allows the suction roller to rotate freely as the film moves, preventing friction damage while achieving continuous dust removal.

[0018] 2. The optical coating area negative pressure dustproof isolation device of the present invention is a rigid frame composed of a fixed sleeve and a roller frame, which ensures that the dust collection roller maintains a constant contact pressure with the film surface through the elastic cooperation of the connecting shaft and the second spring. 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 plate is screwed to the connecting shaft, and the distance between the dust collection 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 by negative pressure and discharged in a centralized manner to avoid secondary pollution;

[0019] 3. The present invention's negative pressure dust isolation device for the optical coating area uses a support frame and sliding rollers to guide the film smoothly through the film inlet and outlet. Guide rollers further correct the film's path, ensuring it passes accurately between the dust collection roller and the optical coater. The negative pressure isolation design within the optical coating chamber physically separates the dust removal and coating areas, reducing the possibility of dust intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a negative pressure dust-proof isolation device for an optical coating area proposed by the present invention;

[0021] Figure 2 This is a front view of the overall structure of a negative pressure dust-proof isolation device for an optical coating area proposed by the present invention;

[0022] Figure 3 A side view of the internal structure of an optical coating chamber of a negative pressure dust-proof isolation device for an optical coating area proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of an optical coating chamber of a negative pressure dust-proof isolation device for an optical coating area proposed by the present invention;

[0024] Figure 5 This is a schematic diagram of the long outer tube connection structure of a negative pressure dust-proof isolation device for an optical coating area proposed by the present invention;

[0025] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part A;

[0026] Figure 7This is a schematic diagram of the internal structure of a long outer tube of a negative pressure dust-proof isolation device for an optical coating area proposed by the present invention;

[0027] Figure 8 This is a schematic diagram of the internal connection structure of a fixed sleeve of a negative pressure dustproof isolation device in an optical coating area proposed by the present invention.

[0028] In the figure: 1. Optical coating chamber; 2. Long outer tube; 3. First spring; 4. Inner tube; 5. Vent; 6. Docking hose; 7. First rotary joint; 8. Dust roller; 9. Dust trough; 10. Fixed sleeve; 11. Roller frame; 12. Guide roller; 13. Connecting shaft; 14. Sleeve; 15. Fixed plate; 16. Second spring; 17. Positioning plate; 18. Second rotary joint; 19. Dust pipe; 20. Blower; 21. Dust removal pipe; 22. Optical coater; 23. Support plate; 24. Support frame; 25. Slide roller; 26. Upper limit plate; 27. Lower limit plate; 28. Film inlet; 29. ​​Film outlet. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figures 1-8 , embodiment 1, a negative pressure dustproof isolation device for an optical coating area, comprising 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, an inner tube 4 is fixedly connected to the outer wall of one end of the first spring 3, and the inner tube 4 is slidably connected to the inner wall of the long outer tube 2, a vent 5 is provided on the outer wall of one end of the inner tube 4 close to 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, and the docking hose 6 is installed on the outer wall of one end with adjacently distributed first rotary joints 7, and the first rotary joints 7 are rotatably connected to the dust suction rollers 8 distributed above and below through sealed bearings. The outer wall of the dust suction roller 8 is provided with dust suction grooves 9 distributed 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 the 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.

[0031] The long outer tube 2 is fixed to the support plate 23 by welding, and one end of the long outer tube 2 is built-in with a first spring 3 and an inner tube 4. The inner tube 4 slides inside 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 vent 5 maintains the connection between the dust suction pipe 19 and the docking hose 6. The air pressure is balanced by the vent 5 to ensure that the docking hose 6 is always tightly connected to the dust roller 8. The dust suction pipe 19 is connected to the long outer tube 2 through the second rotary joint 18. After the blower 20 is started, a negative pressure area is formed at the dust suction groove 9. The dust roller 8 rotates synchronously with the movement of the film, and the dust suction groove 9 is periodically aligned with the film surface to achieve directional adsorption, so that the dust suction groove 9 can only adsorb dust on the film surface, enhancing the dust removal effect. The blower 20 draws the dust-laden airflow into the dust removal pipe 21 through the dust suction pipe 19, and discharges it to the external collection device after multi-stage filtration.

[0032] In this embodiment, the sliding connection between the long outer tube 2 and the inner tube 4, coupled with the elastic support of the first spring 3, allows the inner tube 4 to automatically adjust its extension and contraction based on the film tension, ensuring stable docking between the docking hose 6 and the suction roller 8. Driven by the blower 20, the equidistant suction grooves 9 on the surface of the suction roller 8 create a localized negative pressure that directly acts on the film surface, effectively improving dust absorption efficiency. Furthermore, the first rotary joint 7 allows the suction roller 8 to rotate freely with the movement of the film, preventing friction damage and achieving continuous dust removal.

[0033] In the second embodiment, the outer portion of the dust collecting roller 8 is rotatably connected to a fixed sleeve 10, 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. The inner wall of one side of the optical coating chamber 1 is fixedly connected to a sleeve 14 by screws, and a fixed plate 15 is provided on the outer wall of the connecting shaft 13 on one side of the sleeve 14, and a second spring 16 is fixedly connected between the fixed plate 15 and the sleeve 14.

[0034] The connecting shaft 13 is fixed to both sides of the optical coating chamber 1 through bearings. The second spring 16 connects the fixed plate 15 and the sleeve 14, which can enable the roller frame 11 to tilt as the film tension is adjusted, and the positioning plate 17 adjusts the spacing of the roller frame 11 through threads to adapt to different film widths.

[0035] In this embodiment, the rigid frame formed by the fixed sleeve 10 and roller frame 11, through the elastic interaction between the connecting shaft 13 and the second spring 16, ensures that the dust collection roller 8 maintains constant contact pressure with the film surface. Upper and lower limit plates 26 and 27 define the displacement range of the roller frame 11, preventing deviation due to vibration. A positioning plate 17, threaded onto the connecting shaft 13, allows for quick adjustment of the distance between the dust collection rollers 8 to accommodate films of varying widths. The dust collection duct 21 and blower 20 form a closed circulation system, collecting dust under negative pressure and then discharging it centrally to prevent secondary contamination.

[0036] 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 is arranged on the inner wall of the fixed plate 15. The second spring 16 is arranged on the outside of the connecting shaft 13. The outer wall of the connecting shaft 13 is screwed with symmetrically distributed positioning plates 17 between the two roller frames 11.

[0037] The outer wall of one side of the optical coating chamber 1 is fixedly connected to the support plate 23 by screws, and the outer wall of the other end of the long outer tube 2 is welded to the bottom inner wall of the support plate 23.

[0038] In the third embodiment, an optical coater 22 is fixed to the top of the inner wall on the other side of the optical coating chamber 1 by screws, and symmetrically distributed support frames 24 are welded to the outer wall of one side of the optical coating chamber 1, and a sliding roller 25 is rotatably connected between the two support frames 24. A film is slidably connected to the outer wall of the sliding roller 25, and the film is slidably connected between the two suction rollers 8. The film is slidably connected to the outer wall of the guide roller 12. A film inlet 28 is provided on the outer wall of one side of the optical coating chamber 1, and a film outlet 29 is provided on the outer wall of the top of the optical coating chamber 1. The film passes through the inside of the film inlet 28 and the film outlet 29.

[0039] In this embodiment, the support frame 24 and sliding roller 25 guide the film smoothly through the film inlet 28 and film outlet 29. The guide roller 12 further corrects the film path to ensure that it passes accurately between the dust collection roller 8 and the optical coater 22. The interior of the optical coating chamber 1 uses a negative pressure isolation design to physically separate the dust removal area from the coating area, reducing the probability of dust intrusion.

[0040] Through the above-described scheme, the film enters through film inlet 28, is guided by slide roller 25 and guide roller 12, and then is positioned between two upper and lower dust collection rollers 8. The dust-free film is then aligned with one side of optical coater 22, which is screwed to the top of the inner wall of optical coating chamber 1. Optical coater 22 is aligned with the film surface for optical coating. Film outlet 29 is designed as a slit structure to reduce the backflow of external dust.

[0041] An upper limiting plate 26 and a lower limiting plate 27 are welded to the inner wall of one side of the optical coating chamber 1 , and the height difference between the upper limiting plate 26 and the lower limiting plate 27 is consistent with the width of the roller frame 11 .

[0042] Through the above solution, the upper limiting plate 26 and the lower limiting plate 27 are welded to the inner wall of the coating chamber, and the height difference thereof precisely matches the width of the roller frame 11, so that the roller frame 11 remains horizontally arranged without being subjected to force.

[0043] Working principle:

[0044] Film conveying and dust removal stage:

[0045] The film enters the optical coating chamber 1 through film inlet 28, where it is guided by slide roller 25 and guide roller 12, before entering between upper and lower suction rollers 8. When blower 20 is activated, negative pressure is created in suction trough 9, which absorbs dust from the film's surface. Suction rollers 8 rotate with the film's movement, while a first rotary joint 7 ensures that the negative pressure airflow is transmitted through the docking hose 6 without distortion.

[0046] Dynamic pressure regulation and isolation:

[0047] When film tension changes, inner tube 4 slides within long outer tube 2, and first spring 3 compensates for the displacement, maintaining a constant contact pressure between suction roller 8 and the film. Second spring 16 cushions vibrations of connecting shaft 13, while upper and lower limit plates 26 and 27 limit the range of the roller frame 11's oscillation, ensuring stability in the initial position.

[0048] Coating and dust emission:

[0049] The film after dust removal is sprayed with a functional layer through an optical coater 22 to improve the coating uniformity. The dust-laden airflow enters the dust removal pipe 21 through the dust suction pipe 19. Later, it can be separated by a filter and the clean air is discharged, so that the dust is collected in a closed container. The coated film is discharged from the film outlet 29. The entire process is completed in a negative pressure isolation environment to reduce the risk of dust pollution. After the film is coated, the blower 20 is turned off and the dust suction roller 8 is reset under the action of the second spring 16.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A negative pressure dustproof isolation device for an optical coating area, comprising an optical coating chamber (1), characterized in that: The optical coating chamber (1) is provided with a long outer tube (2) on one side of the outer wall, and a first spring (3) is fixedly connected to the inner wall of one end of the long outer tube (2), an inner tube (4) is fixedly connected to the outer wall of one end of the first spring (3), and the inner tube (4) is slidably connected to the inner wall of the long outer tube (2), a vent (5) is provided on the outer wall of one end of the inner tube (4) close to 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), an adjacent 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 collection roller (8) distributed above and below through a sealed bearing, and dust collection grooves (9) distributed at equal distances are provided on the outer wall of the dust collection roller (8); The outer portion of the dust collecting roller (8) is rotatably connected to a fixed sleeve (10), and roller frames (11) are fixedly connected to the outer walls of both ends of the fixed sleeve (10), and a connecting shaft (13) is installed at the center of the outer walls of the two roller frames (11). The inner wall of one side of the optical coating chamber (1) is fixedly connected to a sleeve (14) by screws, and a fixed disk (15) is provided on the outer wall of the connecting shaft (13) on one side of the sleeve (14), and a second spring (16) is fixedly connected between the fixed disk (15) and the sleeve (14); 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) is arranged on the inner wall of the fixed plate (15). The second spring (16) is arranged on the outside of the connecting shaft (13). The outer wall of the connecting shaft (13) is screwed with symmetrically distributed positioning plates (17) between the two roller frames (11). The outer wall of one side of the optical coating chamber (1) is welded with symmetrically distributed support frames (24), and a sliding roller (25) is rotatably connected between the two support frames (24). A film is slidably connected to the outer wall of the sliding roller (25), and the film is slidably connected between the two dust suction rollers (8). The film is slidably connected to the outer wall of the guide roller (12). An upper limit plate (26) and a lower limit plate (27) are respectively welded to the inner wall of one side of the optical coating chamber (1), and the height difference between the upper limit plate (26) and the lower limit plate (27) is consistent with the width dimension of the roller frame (11).

2. The negative pressure dustproof isolation device for an optical coating area according to claim 1, characterized in that: 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) via 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).

3. The negative pressure dustproof isolation device for an optical coating area according to claim 1, characterized in that: The outer wall of one side of the optical coating chamber (1) is fixedly connected to a support plate (23) by screws, and the outer wall of the other end of the long outer tube (2) is welded to the bottom inner wall of the support plate (23).

4. The negative pressure dustproof isolation device for an optical coating area according to claim 1, characterized in that: An optical coater (22) is fixedly connected to the top of the inner wall of the other side of the optical coating chamber (1) by screws.

5. The negative pressure dustproof isolation device for an optical coating area according to claim 1, characterized in that: A film inlet (28) is provided on one side outer wall of the optical coating chamber (1), and a film outlet (29) is provided on the top outer wall of the optical coating chamber (1), and the film passes through the interior of the film inlet (28) and the film outlet (29).

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